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grub2.29024
0011-libtasn1-import-libtasn1-4.18.0.patch
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File 0011-libtasn1-import-libtasn1-4.18.0.patch of Package grub2.29024
From c3a6fbeb436470aff90a63bb98444eb897fbe2f6 Mon Sep 17 00:00:00 2001 From: Daniel Axtens <dja@axtens.net> Date: Wed, 10 Jun 2020 16:31:22 +1000 Subject: [PATCH 11/23] libtasn1: import libtasn1-4.18.0 Import a very trimmed-down set of libtasn1 files: pushd /tmp wget https://ftp.gnu.org/gnu/libtasn1/libtasn1-4.18.0.tar.gz tar -xf libtasn1-4.18.0.tar.gz popd pushd grub-core/lib rm -rf libtasn1 mkdir libtasn1 cp /tmp/libtasn1-4.18.0/{README.md,COPYING} libtasn1/ mkdir libtasn1/lib cp /tmp/libtasn1-4.18.0/lib/{coding.c,decoding.c,element.c,element.h,errors.c,gstr.c,gstr.h,int.h,parser_aux.c,parser_aux.h,structure.c,structure.h} libtasn1/lib cp /tmp/libtasn1-4.18.0/lib/includes/libtasn1.h ../../include/grub/ git add libtasn1/ ../../include/grub/libtasn1.h popd Signed-off-by: Daniel Axtens <dja@axtens.net> --- grub-core/lib/libtasn1/COPYING | 16 + grub-core/lib/libtasn1/README.md | 98 + grub-core/lib/libtasn1/lib/coding.c | 1425 +++++++++++++ grub-core/lib/libtasn1/lib/decoding.c | 2501 +++++++++++++++++++++++ grub-core/lib/libtasn1/lib/element.c | 1109 ++++++++++ grub-core/lib/libtasn1/lib/element.h | 42 + grub-core/lib/libtasn1/lib/errors.c | 100 + grub-core/lib/libtasn1/lib/gstr.c | 74 + grub-core/lib/libtasn1/lib/gstr.h | 50 + grub-core/lib/libtasn1/lib/int.h | 221 ++ grub-core/lib/libtasn1/lib/parser_aux.c | 1178 +++++++++++ grub-core/lib/libtasn1/lib/parser_aux.h | 172 ++ grub-core/lib/libtasn1/lib/structure.c | 1225 +++++++++++ grub-core/lib/libtasn1/lib/structure.h | 46 + include/grub/libtasn1.h | 639 ++++++ 15 files changed, 8896 insertions(+) create mode 100644 grub-core/lib/libtasn1/COPYING create mode 100644 grub-core/lib/libtasn1/README.md create mode 100644 grub-core/lib/libtasn1/lib/coding.c create mode 100644 grub-core/lib/libtasn1/lib/decoding.c create mode 100644 grub-core/lib/libtasn1/lib/element.c create mode 100644 grub-core/lib/libtasn1/lib/element.h create mode 100644 grub-core/lib/libtasn1/lib/errors.c create mode 100644 grub-core/lib/libtasn1/lib/gstr.c create mode 100644 grub-core/lib/libtasn1/lib/gstr.h create mode 100644 grub-core/lib/libtasn1/lib/int.h create mode 100644 grub-core/lib/libtasn1/lib/parser_aux.c create mode 100644 grub-core/lib/libtasn1/lib/parser_aux.h create mode 100644 grub-core/lib/libtasn1/lib/structure.c create mode 100644 grub-core/lib/libtasn1/lib/structure.h create mode 100644 include/grub/libtasn1.h diff --git a/grub-core/lib/libtasn1/COPYING b/grub-core/lib/libtasn1/COPYING new file mode 100644 index 000000000..e8b3628db --- /dev/null +++ b/grub-core/lib/libtasn1/COPYING @@ -0,0 +1,16 @@ +LICENSING +========= + +The libtasn1 library is released under the GNU Lesser General Public +License (LGPL) version 2.1 or later; see [COPYING.LESSER](doc/COPYING.LESSER) +for the license terms. + +The GNU LGPL applies to the main libtasn1 library, while the +included applications library are under the GNU GPL version 3. +The libtasn1 library is located in the lib directory, while the applications +in src/. + +The documentation in doc/ is under the GNU FDL license 1.3. + +For any copyright year range specified as YYYY-ZZZZ in this package +note that the range specifies every single year in that closed interval. diff --git a/grub-core/lib/libtasn1/README.md b/grub-core/lib/libtasn1/README.md new file mode 100644 index 000000000..b0305b93e --- /dev/null +++ b/grub-core/lib/libtasn1/README.md @@ -0,0 +1,98 @@ +# Libtasn1 README -- Introduction information + +This is GNU Libtasn1, a small ASN.1 library. + +The C library (libtasn1.*) is licensed under the GNU Lesser General +Public License version 2.1 or later. See the file COPYING.LIB. + +The command line tool, self tests, examples, and other auxilliary +files, are licensed under the GNU General Public License version 3.0 +or later. See the file COPYING. + +## Building the library + +We require several tools to build the software, including: + +* [Make](https://www.gnu.org/software/make/) +* [Automake](https://www.gnu.org/software/automake/) (use 1.11.3 or later) +* [Autoconf](https://www.gnu.org/software/autoconf/) +* [Libtool](https://www.gnu.org/software/libtool/) +* [Texinfo](https://www.gnu.org/software/texinfo/) +* [help2man](http://www.gnu.org/software/help2man/) +* [Tar](https://www.gnu.org/software/tar/) +* [Gzip](https://www.gnu.org/software/gzip/) +* [bison](https://www.gnu.org/software/bison/) +* [Texlive & epsf](https://www.tug.org/texlive/) (for PDF manual) +* [GTK-DOC](https://www.gtk.org/gtk-doc/) (for API manual) +* [Git](https://git-scm.com/) +* [libabigail](https://pagure.io/libabigail/) (for abi comparison in make dist) +* [Valgrind](https://valgrind.org/) (optional) + +The required software is typically distributed with your operating +system, and the instructions for installing them differ. Here are +some hints: + +Debian/Ubuntu: +``` +sudo apt-get install make git autoconf automake libtool bison +sudo apt-get install texinfo help2man gtk-doc-tools valgrind abigail-tools +``` + +PDF manual - Debian <= stretch: +``` +sudo apt-get install texlive-generic-recommended texlive texlive-extra-utils +``` + +PDF manual - Debian >= buster: +``` +sudo apt-get install texlive-plain-generic texlive texlive-extra-utils +``` + +The next step is to run autoreconf, ./configure, etc: + +``` +$ ./bootstrap +``` + +Then build the project normally: + +``` +$ ./configure +$ make check +``` + +Happy hacking! + + +## Manual + +The manual is in the `doc/` directory of the release. + +You can also browse the manual online at: + + - https://www.gnu.org/software/libtasn1/manual/ + - https://gnutls.gitlab.io/libtasn1/manual/ + - https://gnutls.gitlab.io/libtasn1/manual/libtasn1.html + - https://gnutls.gitlab.io/libtasn1/manual/libtasn1.pdf + - https://gnutls.gitlab.io/libtasn1/reference/ + - https://gnutls.gitlab.io/libtasn1/reference/libtasn1.pdf + + +## Code coverage report + +The coverage report is at: + + - https://gnutls.gitlab.io/libtasn1/coverage + + +## Issue trackers + + - [Main issue tracker](https://gitlab.com/gnutls/libtasn1/issues) + - [oss-fuzz found issues](https://bugs.chromium.org/p/oss-fuzz/issues/list?q=libtasn1&can=2) + + +## Homepage + +The project homepage at the gnu site is at: + +https://www.gnu.org/software/libtasn1/ diff --git a/grub-core/lib/libtasn1/lib/coding.c b/grub-core/lib/libtasn1/lib/coding.c new file mode 100644 index 000000000..671104f63 --- /dev/null +++ b/grub-core/lib/libtasn1/lib/coding.c @@ -0,0 +1,1425 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + + +/*****************************************************/ +/* File: coding.c */ +/* Description: Functions to create a DER coding of */ +/* an ASN1 type. */ +/*****************************************************/ + +#include <int.h> +#include "parser_aux.h" +#include <gstr.h> +#include "element.h" +#include "minmax.h" +#include <structure.h> + +#define MAX_TAG_LEN 16 + +/******************************************************/ +/* Function : _asn1_error_description_value_not_found */ +/* Description: creates the ErrorDescription string */ +/* for the ASN1_VALUE_NOT_FOUND error. */ +/* Parameters: */ +/* node: node of the tree where the value is NULL. */ +/* ErrorDescription: string returned. */ +/* Return: */ +/******************************************************/ +static void +_asn1_error_description_value_not_found (asn1_node node, + char *ErrorDescription) +{ + + if (ErrorDescription == NULL) + return; + + Estrcpy (ErrorDescription, ":: value of element '"); + _asn1_hierarchical_name (node, ErrorDescription + strlen (ErrorDescription), + ASN1_MAX_ERROR_DESCRIPTION_SIZE - 40); + Estrcat (ErrorDescription, "' not found"); + +} + +/** + * asn1_length_der: + * @len: value to convert. + * @der: buffer to hold the returned encoding (may be %NULL). + * @der_len: number of meaningful bytes of ANS (der[0]..der[der_len-1]). + * + * Creates the DER encoding of the provided length value. + * The @der buffer must have enough room for the output. The maximum + * length this function will encode is %ASN1_MAX_LENGTH_SIZE. + * + * To know the size of the DER encoding use a %NULL value for @der. + **/ +void +asn1_length_der (unsigned long int len, unsigned char *der, int *der_len) +{ + int k; + unsigned char temp[ASN1_MAX_LENGTH_SIZE]; +#if SIZEOF_UNSIGNED_LONG_INT > 8 + len &= 0xFFFFFFFFFFFFFFFF; +#endif + + if (len < 128) + { + /* short form */ + if (der != NULL) + der[0] = (unsigned char) len; + *der_len = 1; + } + else + { + /* Long form */ + k = 0; + while (len) + { + temp[k++] = len & 0xFF; + len = len >> 8; + } + *der_len = k + 1; + if (der != NULL) + { + der[0] = ((unsigned char) k & 0x7F) + 128; + while (k--) + der[*der_len - 1 - k] = temp[k]; + } + } +} + +/******************************************************/ +/* Function : _asn1_tag_der */ +/* Description: creates the DER coding for the CLASS */ +/* and TAG parameters. */ +/* It is limited by the ASN1_MAX_TAG_SIZE variable */ +/* Parameters: */ +/* class: value to convert. */ +/* tag_value: value to convert. */ +/* ans: string returned. */ +/* ans_len: number of meaningful bytes of ANS */ +/* (ans[0]..ans[ans_len-1]). */ +/* Return: */ +/******************************************************/ +static void +_asn1_tag_der (unsigned char class, unsigned int tag_value, + unsigned char ans[ASN1_MAX_TAG_SIZE], int *ans_len) +{ + int k; + unsigned char temp[ASN1_MAX_TAG_SIZE]; + + if (tag_value < 31) + { + /* short form */ + ans[0] = (class & 0xE0) + ((unsigned char) (tag_value & 0x1F)); + *ans_len = 1; + } + else + { + /* Long form */ + ans[0] = (class & 0xE0) + 31; + k = 0; + while (tag_value != 0) + { + temp[k++] = tag_value & 0x7F; + tag_value >>= 7; + + if (k > ASN1_MAX_TAG_SIZE - 1) + break; /* will not encode larger tags */ + } + *ans_len = k + 1; + while (k--) + ans[*ans_len - 1 - k] = temp[k] + 128; + ans[*ans_len - 1] -= 128; + } +} + +/** + * asn1_octet_der: + * @str: the input data. + * @str_len: STR length (str[0]..str[*str_len-1]). + * @der: encoded string returned. + * @der_len: number of meaningful bytes of DER (der[0]..der[der_len-1]). + * + * Creates a length-value DER encoding for the input data. + * The DER encoding of the input data will be placed in the @der variable. + * + * Note that the OCTET STRING tag is not included in the output. + * + * This function does not return any value because it is expected + * that @der_len will contain enough bytes to store the string + * plus the DER encoding. The DER encoding size can be obtained using + * asn1_length_der(). + **/ +void +asn1_octet_der (const unsigned char *str, int str_len, + unsigned char *der, int *der_len) +{ + int len_len; + + if (der == NULL || str_len < 0) + return; + + asn1_length_der (str_len, der, &len_len); + memcpy (der + len_len, str, str_len); + *der_len = str_len + len_len; +} + + +/** + * asn1_encode_simple_der: + * @etype: The type of the string to be encoded (ASN1_ETYPE_) + * @str: the string data. + * @str_len: the string length + * @tl: the encoded tag and length + * @tl_len: the bytes of the @tl field + * + * Creates the DER encoding for various simple ASN.1 types like strings etc. + * It stores the tag and length in @tl, which should have space for at least + * %ASN1_MAX_TL_SIZE bytes. Initially @tl_len should contain the size of @tl. + * + * The complete DER encoding should consist of the value in @tl appended + * with the provided @str. + * + * Returns: %ASN1_SUCCESS if successful or an error value. + **/ +int +asn1_encode_simple_der (unsigned int etype, const unsigned char *str, + unsigned int str_len, unsigned char *tl, + unsigned int *tl_len) +{ + int tag_len, len_len; + unsigned tlen; + unsigned char der_tag[ASN1_MAX_TAG_SIZE]; + unsigned char der_length[ASN1_MAX_LENGTH_SIZE]; + unsigned char *p; + + if (str == NULL) + return ASN1_VALUE_NOT_VALID; + + if (ETYPE_OK (etype) == 0) + return ASN1_VALUE_NOT_VALID; + + /* doesn't handle constructed classes */ + if (ETYPE_CLASS (etype) != ASN1_CLASS_UNIVERSAL) + return ASN1_VALUE_NOT_VALID; + + _asn1_tag_der (ETYPE_CLASS (etype), ETYPE_TAG (etype), der_tag, &tag_len); + + asn1_length_der (str_len, der_length, &len_len); + + if (tag_len <= 0 || len_len <= 0) + return ASN1_VALUE_NOT_VALID; + + tlen = tag_len + len_len; + + if (*tl_len < tlen) + return ASN1_MEM_ERROR; + + p = tl; + memcpy (p, der_tag, tag_len); + p += tag_len; + memcpy (p, der_length, len_len); + + *tl_len = tlen; + + return ASN1_SUCCESS; +} + +/******************************************************/ +/* Function : _asn1_time_der */ +/* Description: creates the DER coding for a TIME */ +/* type (length included). */ +/* Parameters: */ +/* str: TIME null-terminated string. */ +/* der: string returned. */ +/* der_len: number of meaningful bytes of DER */ +/* (der[0]..der[ans_len-1]). Initially it */ +/* if must store the lenght of DER. */ +/* Return: */ +/* ASN1_MEM_ERROR when DER isn't big enough */ +/* ASN1_SUCCESS otherwise */ +/******************************************************/ +static int +_asn1_time_der (unsigned char *str, int str_len, unsigned char *der, + int *der_len) +{ + int len_len; + int max_len; + + max_len = *der_len; + + asn1_length_der (str_len, (max_len > 0) ? der : NULL, &len_len); + + if ((len_len + str_len) <= max_len) + memcpy (der + len_len, str, str_len); + *der_len = len_len + str_len; + + if ((*der_len) > max_len) + return ASN1_MEM_ERROR; + + return ASN1_SUCCESS; +} + + +/* +void +_asn1_get_utctime_der(unsigned char *der,int *der_len,unsigned char *str) +{ + int len_len,str_len; + char temp[20]; + + if(str==NULL) return; + str_len=asn1_get_length_der(der,*der_len,&len_len); + if (str_len<0) return; + memcpy(temp,der+len_len,str_len); + *der_len=str_len+len_len; + switch(str_len) + { + case 11: + temp[10]=0; + strcat(temp,"00+0000"); + break; + case 13: + temp[12]=0; + strcat(temp,"+0000"); + break; + case 15: + temp[15]=0; + memmove(temp+12,temp+10,6); + temp[10]=temp[11]='0'; + break; + case 17: + temp[17]=0; + break; + default: + return; + } + strcpy(str,temp); +} +*/ + +static void +encode_val (uint64_t val, unsigned char *der, int max_len, int *der_len) +{ + int first, k; + unsigned char bit7; + + first = 0; + for (k = sizeof (val); k >= 0; k--) + { + bit7 = (val >> (k * 7)) & 0x7F; + if (bit7 || first || !k) + { + if (k) + bit7 |= 0x80; + if (max_len > (*der_len)) + der[*der_len] = bit7; + (*der_len)++; + first = 1; + } + } +} + +/******************************************************/ +/* Function : _asn1_object_id_der */ +/* Description: creates the DER coding for an */ +/* OBJECT IDENTIFIER type (length included). */ +/* Parameters: */ +/* str: OBJECT IDENTIFIER null-terminated string. */ +/* der: string returned. */ +/* der_len: number of meaningful bytes of DER */ +/* (der[0]..der[ans_len-1]). Initially it */ +/* must store the length of DER. */ +/* Return: */ +/* ASN1_MEM_ERROR when DER isn't big enough */ +/* ASN1_SUCCESS if succesful */ +/* or an error value. */ +/******************************************************/ +static int +_asn1_object_id_der (const char *str, unsigned char *der, int *der_len) +{ + int len_len, counter, max_len; + char *temp, *n_end, *n_start; + uint64_t val, val1 = 0; + int str_len = _asn1_strlen (str); + + max_len = *der_len; + *der_len = 0; + + if (der == NULL && max_len > 0) + return ASN1_VALUE_NOT_VALID; + + temp = malloc (str_len + 2); + if (temp == NULL) + return ASN1_MEM_ALLOC_ERROR; + + memcpy (temp, str, str_len); + temp[str_len] = '.'; + temp[str_len + 1] = 0; + + counter = 0; + n_start = temp; + while ((n_end = strchr (n_start, '.'))) + { + *n_end = 0; + val = _asn1_strtou64 (n_start, NULL, 10); + counter++; + + if (counter == 1) + { + val1 = val; + } + else if (counter == 2) + { + uint64_t val0; + + if (val1 > 2) + { + free (temp); + return ASN1_VALUE_NOT_VALID; + } + else if ((val1 == 0 || val1 == 1) && val > 39) + { + free (temp); + return ASN1_VALUE_NOT_VALID; + } + + val0 = 40 * val1 + val; + encode_val (val0, der, max_len, der_len); + } + else + { + encode_val (val, der, max_len, der_len); + } + n_start = n_end + 1; + } + + asn1_length_der (*der_len, NULL, &len_len); + if (max_len >= (*der_len + len_len)) + { + memmove (der + len_len, der, *der_len); + asn1_length_der (*der_len, der, &len_len); + } + *der_len += len_len; + + free (temp); + + if (max_len < (*der_len)) + return ASN1_MEM_ERROR; + + return ASN1_SUCCESS; +} + +/** + * asn1_object_id_der: + * @str: An object identifier in numeric, dot format. + * @der: buffer to hold the returned encoding (may be %NULL). + * @der_len: initially the size of @der; will hold the final size. + * @flags: must be zero + * + * Creates the DER encoding of the provided object identifier. + * + * Returns: %ASN1_SUCCESS if DER encoding was OK, %ASN1_VALUE_NOT_VALID + * if @str is not a valid OID, %ASN1_MEM_ERROR if the @der + * vector isn't big enough and in this case @der_len will contain the + * length needed. + **/ +int +asn1_object_id_der (const char *str, unsigned char *der, int *der_len, + unsigned flags) +{ + unsigned char tag_der[MAX_TAG_LEN]; + int tag_len = 0, r; + int max_len = *der_len; + + *der_len = 0; + + _asn1_tag_der (ETYPE_CLASS (ASN1_ETYPE_OBJECT_ID), + ETYPE_TAG (ASN1_ETYPE_OBJECT_ID), tag_der, &tag_len); + + if (max_len > tag_len) + { + memcpy (der, tag_der, tag_len); + } + max_len -= tag_len; + der += tag_len; + + r = _asn1_object_id_der (str, der, &max_len); + if (r == ASN1_MEM_ERROR || r == ASN1_SUCCESS) + { + *der_len = max_len + tag_len; + } + + return r; +} + +static const unsigned char bit_mask[] = + { 0xFF, 0xFE, 0xFC, 0xF8, 0xF0, 0xE0, 0xC0, 0x80 }; + +/** + * asn1_bit_der: + * @str: BIT string. + * @bit_len: number of meaningful bits in STR. + * @der: string returned. + * @der_len: number of meaningful bytes of DER + * (der[0]..der[ans_len-1]). + * + * Creates a length-value DER encoding for the input data + * as it would have been for a BIT STRING. + * The DER encoded data will be copied in @der. + * + * Note that the BIT STRING tag is not included in the output. + * + * This function does not return any value because it is expected + * that @der_len will contain enough bytes to store the string + * plus the DER encoding. The DER encoding size can be obtained using + * asn1_length_der(). + **/ +void +asn1_bit_der (const unsigned char *str, int bit_len, + unsigned char *der, int *der_len) +{ + int len_len, len_byte, len_pad; + + if (der == NULL) + return; + + len_byte = bit_len >> 3; + len_pad = 8 - (bit_len & 7); + if (len_pad == 8) + len_pad = 0; + else + len_byte++; + asn1_length_der (len_byte + 1, der, &len_len); + der[len_len] = len_pad; + + if (str) + memcpy (der + len_len + 1, str, len_byte); + der[len_len + len_byte] &= bit_mask[len_pad]; + *der_len = len_byte + len_len + 1; +} + + +/******************************************************/ +/* Function : _asn1_complete_explicit_tag */ +/* Description: add the length coding to the EXPLICIT */ +/* tags. */ +/* Parameters: */ +/* node: pointer to the tree element. */ +/* der: string with the DER coding of the whole tree*/ +/* counter: number of meaningful bytes of DER */ +/* (der[0]..der[*counter-1]). */ +/* max_len: size of der vector */ +/* Return: */ +/* ASN1_MEM_ERROR if der vector isn't big enough, */ +/* otherwise ASN1_SUCCESS. */ +/******************************************************/ +static int +_asn1_complete_explicit_tag (asn1_node node, unsigned char *der, + int *counter, int *max_len) +{ + asn1_node p; + int is_tag_implicit, len2, len3; + unsigned char temp[SIZEOF_UNSIGNED_INT]; + + if (der == NULL && *max_len > 0) + return ASN1_VALUE_NOT_VALID; + + is_tag_implicit = 0; + + if (node->type & CONST_TAG) + { + p = node->down; + if (p == NULL) + return ASN1_DER_ERROR; + /* When there are nested tags we must complete them reverse to + the order they were created. This is because completing a tag + modifies all data within it, including the incomplete tags + which store buffer positions -- simon@josefsson.org 2002-09-06 + */ + while (p->right) + p = p->right; + while (p && p != node->down->left) + { + if (type_field (p->type) == ASN1_ETYPE_TAG) + { + if (p->type & CONST_EXPLICIT) + { + len2 = strtol (p->name, NULL, 10); + _asn1_set_name (p, NULL); + + asn1_length_der (*counter - len2, temp, &len3); + if (len3 <= (*max_len)) + { + memmove (der + len2 + len3, der + len2, + *counter - len2); + memcpy (der + len2, temp, len3); + } + *max_len -= len3; + *counter += len3; + is_tag_implicit = 0; + } + else + { /* CONST_IMPLICIT */ + if (!is_tag_implicit) + { + is_tag_implicit = 1; + } + } + } + p = p->left; + } + } + + if (*max_len < 0) + return ASN1_MEM_ERROR; + + return ASN1_SUCCESS; +} + +const tag_and_class_st _asn1_tags[] = { + [ASN1_ETYPE_GENERALSTRING] = + {ASN1_TAG_GENERALSTRING, ASN1_CLASS_UNIVERSAL, "type:GENERALSTRING"}, + [ASN1_ETYPE_NUMERIC_STRING] = + {ASN1_TAG_NUMERIC_STRING, ASN1_CLASS_UNIVERSAL, "type:NUMERIC_STR"}, + [ASN1_ETYPE_IA5_STRING] = + {ASN1_TAG_IA5_STRING, ASN1_CLASS_UNIVERSAL, "type:IA5_STR"}, + [ASN1_ETYPE_TELETEX_STRING] = + {ASN1_TAG_TELETEX_STRING, ASN1_CLASS_UNIVERSAL, "type:TELETEX_STR"}, + [ASN1_ETYPE_PRINTABLE_STRING] = + {ASN1_TAG_PRINTABLE_STRING, ASN1_CLASS_UNIVERSAL, "type:PRINTABLE_STR"}, + [ASN1_ETYPE_UNIVERSAL_STRING] = + {ASN1_TAG_UNIVERSAL_STRING, ASN1_CLASS_UNIVERSAL, "type:UNIVERSAL_STR"}, + [ASN1_ETYPE_BMP_STRING] = + {ASN1_TAG_BMP_STRING, ASN1_CLASS_UNIVERSAL, "type:BMP_STR"}, + [ASN1_ETYPE_UTF8_STRING] = + {ASN1_TAG_UTF8_STRING, ASN1_CLASS_UNIVERSAL, "type:UTF8_STR"}, + [ASN1_ETYPE_VISIBLE_STRING] = + {ASN1_TAG_VISIBLE_STRING, ASN1_CLASS_UNIVERSAL, "type:VISIBLE_STR"}, + [ASN1_ETYPE_OCTET_STRING] = + {ASN1_TAG_OCTET_STRING, ASN1_CLASS_UNIVERSAL, "type:OCT_STR"}, + [ASN1_ETYPE_BIT_STRING] = + {ASN1_TAG_BIT_STRING, ASN1_CLASS_UNIVERSAL, "type:BIT_STR"}, + [ASN1_ETYPE_OBJECT_ID] = + {ASN1_TAG_OBJECT_ID, ASN1_CLASS_UNIVERSAL, "type:OBJ_ID"}, + [ASN1_ETYPE_NULL] = {ASN1_TAG_NULL, ASN1_CLASS_UNIVERSAL, "type:NULL"}, + [ASN1_ETYPE_BOOLEAN] = + {ASN1_TAG_BOOLEAN, ASN1_CLASS_UNIVERSAL, "type:BOOLEAN"}, + [ASN1_ETYPE_INTEGER] = + {ASN1_TAG_INTEGER, ASN1_CLASS_UNIVERSAL, "type:INTEGER"}, + [ASN1_ETYPE_ENUMERATED] = + {ASN1_TAG_ENUMERATED, ASN1_CLASS_UNIVERSAL, "type:ENUMERATED"}, + [ASN1_ETYPE_SEQUENCE] = + {ASN1_TAG_SEQUENCE, ASN1_CLASS_UNIVERSAL | ASN1_CLASS_STRUCTURED, + "type:SEQUENCE"}, + [ASN1_ETYPE_SEQUENCE_OF] = + {ASN1_TAG_SEQUENCE, ASN1_CLASS_UNIVERSAL | ASN1_CLASS_STRUCTURED, + "type:SEQ_OF"}, + [ASN1_ETYPE_SET] = + {ASN1_TAG_SET, ASN1_CLASS_UNIVERSAL | ASN1_CLASS_STRUCTURED, "type:SET"}, + [ASN1_ETYPE_SET_OF] = + {ASN1_TAG_SET, ASN1_CLASS_UNIVERSAL | ASN1_CLASS_STRUCTURED, + "type:SET_OF"}, + [ASN1_ETYPE_GENERALIZED_TIME] = + {ASN1_TAG_GENERALIZEDTime, ASN1_CLASS_UNIVERSAL, "type:GENERALIZED_TIME"}, + [ASN1_ETYPE_UTC_TIME] = + {ASN1_TAG_UTCTime, ASN1_CLASS_UNIVERSAL, "type:UTC_TIME"}, +}; + +unsigned int _asn1_tags_size = sizeof (_asn1_tags) / sizeof (_asn1_tags[0]); + +/******************************************************/ +/* Function : _asn1_insert_tag_der */ +/* Description: creates the DER coding of tags of one */ +/* NODE. */ +/* Parameters: */ +/* node: pointer to the tree element. */ +/* der: string returned */ +/* counter: number of meaningful bytes of DER */ +/* (counter[0]..der[*counter-1]). */ +/* max_len: size of der vector */ +/* Return: */ +/* ASN1_GENERIC_ERROR if the type is unknown, */ +/* ASN1_MEM_ERROR if der vector isn't big enough, */ +/* otherwise ASN1_SUCCESS. */ +/******************************************************/ +static int +_asn1_insert_tag_der (asn1_node node, unsigned char *der, int *counter, + int *max_len) +{ + asn1_node p; + int tag_len, is_tag_implicit; + unsigned char class, class_implicit = + 0, temp[MAX (SIZEOF_UNSIGNED_INT * 3 + 1, LTOSTR_MAX_SIZE)]; + unsigned long tag_implicit = 0; + unsigned char tag_der[MAX_TAG_LEN]; + + is_tag_implicit = 0; + + if (node->type & CONST_TAG) + { + p = node->down; + while (p) + { + if (type_field (p->type) == ASN1_ETYPE_TAG) + { + if (p->type & CONST_APPLICATION) + class = ASN1_CLASS_APPLICATION; + else if (p->type & CONST_UNIVERSAL) + class = ASN1_CLASS_UNIVERSAL; + else if (p->type & CONST_PRIVATE) + class = ASN1_CLASS_PRIVATE; + else + class = ASN1_CLASS_CONTEXT_SPECIFIC; + + if (p->type & CONST_EXPLICIT) + { + if (is_tag_implicit) + _asn1_tag_der (class_implicit, tag_implicit, tag_der, + &tag_len); + else + _asn1_tag_der (class | ASN1_CLASS_STRUCTURED, + _asn1_strtoul (p->value, NULL, 10), + tag_der, &tag_len); + + *max_len -= tag_len; + if (der && *max_len >= 0) + memcpy (der + *counter, tag_der, tag_len); + *counter += tag_len; + + _asn1_ltostr (*counter, (char *) temp); + _asn1_set_name (p, (const char *) temp); + + is_tag_implicit = 0; + } + else + { /* CONST_IMPLICIT */ + if (!is_tag_implicit) + { + if ((type_field (node->type) == ASN1_ETYPE_SEQUENCE) || + (type_field (node->type) == ASN1_ETYPE_SEQUENCE_OF) + || (type_field (node->type) == ASN1_ETYPE_SET) + || (type_field (node->type) == ASN1_ETYPE_SET_OF)) + class |= ASN1_CLASS_STRUCTURED; + class_implicit = class; + tag_implicit = _asn1_strtoul (p->value, NULL, 10); + is_tag_implicit = 1; + } + } + } + p = p->right; + } + } + + if (is_tag_implicit) + { + _asn1_tag_der (class_implicit, tag_implicit, tag_der, &tag_len); + } + else + { + unsigned type = type_field (node->type); + switch (type) + { + CASE_HANDLED_ETYPES: + _asn1_tag_der (_asn1_tags[type].class, _asn1_tags[type].tag, + tag_der, &tag_len); + break; + case ASN1_ETYPE_TAG: + case ASN1_ETYPE_CHOICE: + case ASN1_ETYPE_ANY: + tag_len = 0; + break; + default: + return ASN1_GENERIC_ERROR; + } + } + + *max_len -= tag_len; + if (der && *max_len >= 0) + memcpy (der + *counter, tag_der, tag_len); + *counter += tag_len; + + if (*max_len < 0) + return ASN1_MEM_ERROR; + + return ASN1_SUCCESS; +} + +/******************************************************/ +/* Function : _asn1_ordering_set */ +/* Description: puts the elements of a SET type in */ +/* the correct order according to DER rules. */ +/* Parameters: */ +/* der: string with the DER coding. */ +/* node: pointer to the SET element. */ +/* Return: */ +/* ASN1_SUCCESS if successful */ +/* or an error value. */ +/******************************************************/ +static int +_asn1_ordering_set (unsigned char *der, int der_len, asn1_node node) +{ + struct vet + { + int end; + unsigned long value; + struct vet *next, *prev; + }; + + int counter, len, len2; + struct vet *first, *last, *p_vet, *p2_vet; + asn1_node p; + unsigned char class, *temp; + unsigned long tag, t; + int err; + + counter = 0; + + if (type_field (node->type) != ASN1_ETYPE_SET) + return ASN1_VALUE_NOT_VALID; + + p = node->down; + while (p && ((type_field (p->type) == ASN1_ETYPE_TAG) || + (type_field (p->type) == ASN1_ETYPE_SIZE))) + p = p->right; + + if ((p == NULL) || (p->right == NULL)) + return ASN1_SUCCESS; + + first = last = NULL; + while (p) + { + p_vet = malloc (sizeof (struct vet)); + if (p_vet == NULL) + { + err = ASN1_MEM_ALLOC_ERROR; + goto error; + } + + p_vet->next = NULL; + p_vet->prev = last; + if (first == NULL) + first = p_vet; + else + last->next = p_vet; + last = p_vet; + + /* tag value calculation */ + err = asn1_get_tag_der (der + counter, der_len - counter, &class, &len2, + &tag); + if (err != ASN1_SUCCESS) + goto error; + + t = ((unsigned int) class) << 24; + p_vet->value = t | tag; + counter += len2; + + /* extraction and length */ + len2 = asn1_get_length_der (der + counter, der_len - counter, &len); + if (len2 < 0) + { + err = ASN1_DER_ERROR; + goto error; + } + counter += len + len2; + + p_vet->end = counter; + p = p->right; + } + + p_vet = first; + + while (p_vet) + { + p2_vet = p_vet->next; + counter = 0; + while (p2_vet) + { + if (p_vet->value > p2_vet->value) + { + /* change position */ + temp = malloc (p_vet->end - counter); + if (temp == NULL) + { + err = ASN1_MEM_ALLOC_ERROR; + goto error; + } + + memcpy (temp, der + counter, p_vet->end - counter); + memcpy (der + counter, der + p_vet->end, + p2_vet->end - p_vet->end); + memcpy (der + counter + p2_vet->end - p_vet->end, temp, + p_vet->end - counter); + free (temp); + + tag = p_vet->value; + p_vet->value = p2_vet->value; + p2_vet->value = tag; + + p_vet->end = counter + (p2_vet->end - p_vet->end); + } + counter = p_vet->end; + + p2_vet = p2_vet->next; + p_vet = p_vet->next; + } + + if (p_vet != first) + p_vet->prev->next = NULL; + else + first = NULL; + free (p_vet); + p_vet = first; + } + return ASN1_SUCCESS; + +error: + while (first != NULL) + { + p_vet = first; + first = first->next; + free (p_vet); + } + return err; +} + +struct vet +{ + unsigned char *ptr; + int size; +}; + +static int +setof_compar (const void *_e1, const void *_e2) +{ + unsigned length; + const struct vet *e1 = _e1, *e2 = _e2; + int rval; + + /* The encodings of the component values of a set-of value shall + * appear in ascending order, the encodings being compared + * as octet strings with the shorter components being + * padded at their trailing end with 0-octets. + * The padding octets are for comparison purposes and + * do not appear in the encodings. + */ + length = MIN (e1->size, e2->size); + + rval = memcmp (e1->ptr, e2->ptr, length); + if (rval == 0 && e1->size != e2->size) + { + if (e1->size > e2->size) + rval = 1; + else if (e2->size > e1->size) + rval = -1; + } + + return rval; +} + +/******************************************************/ +/* Function : _asn1_ordering_set_of */ +/* Description: puts the elements of a SET OF type in */ +/* the correct order according to DER rules. */ +/* Parameters: */ +/* der: string with the DER coding. */ +/* node: pointer to the SET OF element. */ +/* Return: */ +/* ASN1_SUCCESS if successful */ +/* or an error value. */ +/******************************************************/ +static int +_asn1_ordering_set_of (unsigned char *der, int der_len, asn1_node node) +{ + int counter, len, len2; + struct vet *list = NULL, *tlist; + unsigned list_size = 0; + struct vet *p_vet; + asn1_node p; + unsigned char class; + unsigned i; + unsigned char *out = NULL; + int err; + + counter = 0; + + if (type_field (node->type) != ASN1_ETYPE_SET_OF) + return ASN1_VALUE_NOT_VALID; + + p = node->down; + while (p && ((type_field (p->type) == ASN1_ETYPE_TAG) || + (type_field (p->type) == ASN1_ETYPE_SIZE))) + p = p->right; + if (p == NULL) + return ASN1_VALUE_NOT_VALID; + p = p->right; + + if ((p == NULL) || (p->right == NULL)) + return ASN1_SUCCESS; + + while (p) + { + list_size++; + tlist = realloc (list, list_size * sizeof (struct vet)); + if (tlist == NULL) + { + err = ASN1_MEM_ALLOC_ERROR; + goto error; + } + list = tlist; + p_vet = &list[list_size - 1]; + + p_vet->ptr = der + counter; + p_vet->size = 0; + + /* extraction of tag and length */ + if (der_len - counter > 0) + { + err = asn1_get_tag_der (der + counter, der_len - counter, &class, + &len, NULL); + if (err != ASN1_SUCCESS) + goto error; + counter += len; + p_vet->size += len; + + len2 = asn1_get_length_der (der + counter, der_len - counter, &len); + if (len2 < 0) + { + err = ASN1_DER_ERROR; + goto error; + } + counter += len + len2; + p_vet->size += len + len2; + + } + else + { + err = ASN1_DER_ERROR; + goto error; + } + p = p->right; + } + + if (counter > der_len) + { + err = ASN1_DER_ERROR; + goto error; + } + + qsort (list, list_size, sizeof (struct vet), setof_compar); + + out = malloc (der_len); + if (out == NULL) + { + err = ASN1_MEM_ERROR; + goto error; + } + + /* the sum of p_vet->size == der_len */ + counter = 0; + for (i = 0; i < list_size; i++) + { + p_vet = &list[i]; + memcpy (out + counter, p_vet->ptr, p_vet->size); + counter += p_vet->size; + } + memcpy (der, out, der_len); + free (out); + + err = ASN1_SUCCESS; + +error: + free (list); + return err; +} + +/** + * asn1_der_coding: + * @element: pointer to an ASN1 element + * @name: the name of the structure you want to encode (it must be + * inside *POINTER). + * @ider: vector that will contain the DER encoding. DER must be a + * pointer to memory cells already allocated. + * @len: number of bytes of *@ider: @ider[0]..@ider[len-1], Initialy + * holds the sizeof of der vector. + * @ErrorDescription: return the error description or an empty + * string if success. + * + * Creates the DER encoding for the NAME structure (inside *POINTER + * structure). + * + * Returns: %ASN1_SUCCESS if DER encoding OK, %ASN1_ELEMENT_NOT_FOUND + * if @name is not a valid element, %ASN1_VALUE_NOT_FOUND if there + * is an element without a value, %ASN1_MEM_ERROR if the @ider + * vector isn't big enough and in this case @len will contain the + * length needed. + **/ +int +asn1_der_coding (asn1_node_const element, const char *name, void *ider, + int *len, char *ErrorDescription) +{ + asn1_node node, p, p2; + unsigned char temp[MAX (LTOSTR_MAX_SIZE, SIZEOF_UNSIGNED_LONG_INT * 3 + 1)]; + int counter, counter_old, len2, len3, move, max_len, max_len_old; + int err; + unsigned char *der = ider; + unsigned char dummy; + + if (ErrorDescription) + ErrorDescription[0] = 0; + + node = asn1_find_node (element, name); + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + /* Node is now a locally allocated variable. + * That is because in some point we modify the + * structure, and I don't know why! --nmav + */ + node = _asn1_copy_structure3 (node); + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + max_len = *len; + + if (der == NULL && max_len > 0) + { + err = ASN1_VALUE_NOT_VALID; + goto error; + } + + counter = 0; + move = DOWN; + p = node; + + while (1) + { + + counter_old = counter; + max_len_old = max_len; + if (move != UP) + { + p->start = counter; + err = _asn1_insert_tag_der (p, der, &counter, &max_len); + if (err != ASN1_SUCCESS && err != ASN1_MEM_ERROR) + goto error; + } + switch (type_field (p->type)) + { + case ASN1_ETYPE_NULL: + max_len--; + if (der != NULL && max_len >= 0) + der[counter] = 0; + counter++; + move = RIGHT; + break; + case ASN1_ETYPE_BOOLEAN: + if ((p->type & CONST_DEFAULT) && (p->value == NULL)) + { + counter = counter_old; + max_len = max_len_old; + } + else + { + if (p->value == NULL) + { + _asn1_error_description_value_not_found (p, + ErrorDescription); + err = ASN1_VALUE_NOT_FOUND; + goto error; + } + max_len -= 2; + if (der != NULL && max_len >= 0) + { + der[counter++] = 1; + if (p->value[0] == 'F') + der[counter++] = 0; + else + der[counter++] = 0xFF; + } + else + counter += 2; + } + move = RIGHT; + break; + case ASN1_ETYPE_INTEGER: + case ASN1_ETYPE_ENUMERATED: + if ((p->type & CONST_DEFAULT) && (p->value == NULL)) + { + counter = counter_old; + max_len = max_len_old; + } + else + { + if (p->value == NULL) + { + _asn1_error_description_value_not_found (p, + ErrorDescription); + err = ASN1_VALUE_NOT_FOUND; + goto error; + } + len2 = asn1_get_length_der (p->value, p->value_len, &len3); + if (len2 < 0) + { + err = ASN1_DER_ERROR; + goto error; + } + max_len -= len2 + len3; + if (der != NULL && max_len >= 0) + memcpy (der + counter, p->value, len3 + len2); + counter += len3 + len2; + } + move = RIGHT; + break; + case ASN1_ETYPE_OBJECT_ID: + if ((p->type & CONST_DEFAULT) && (p->value == NULL)) + { + counter = counter_old; + max_len = max_len_old; + } + else + { + if (p->value == NULL) + { + _asn1_error_description_value_not_found (p, + ErrorDescription); + err = ASN1_VALUE_NOT_FOUND; + goto error; + } + len2 = max_len; + err = + _asn1_object_id_der ((char *) p->value, + der ? der + counter : &dummy, &len2); + if (err != ASN1_SUCCESS && err != ASN1_MEM_ERROR) + goto error; + + max_len -= len2; + counter += len2; + } + move = RIGHT; + break; + case ASN1_ETYPE_GENERALIZED_TIME: + case ASN1_ETYPE_UTC_TIME: + if (p->value == NULL) + { + _asn1_error_description_value_not_found (p, ErrorDescription); + err = ASN1_VALUE_NOT_FOUND; + goto error; + } + len2 = max_len; + err = + _asn1_time_der (p->value, p->value_len, + der ? der + counter : &dummy, &len2); + if (err != ASN1_SUCCESS && err != ASN1_MEM_ERROR) + goto error; + + max_len -= len2; + counter += len2; + move = RIGHT; + break; + case ASN1_ETYPE_OCTET_STRING: + case ASN1_ETYPE_GENERALSTRING: + case ASN1_ETYPE_NUMERIC_STRING: + case ASN1_ETYPE_IA5_STRING: + case ASN1_ETYPE_TELETEX_STRING: + case ASN1_ETYPE_PRINTABLE_STRING: + case ASN1_ETYPE_UNIVERSAL_STRING: + case ASN1_ETYPE_BMP_STRING: + case ASN1_ETYPE_UTF8_STRING: + case ASN1_ETYPE_VISIBLE_STRING: + case ASN1_ETYPE_BIT_STRING: + if (p->value == NULL) + { + _asn1_error_description_value_not_found (p, ErrorDescription); + err = ASN1_VALUE_NOT_FOUND; + goto error; + } + len2 = asn1_get_length_der (p->value, p->value_len, &len3); + if (len2 < 0) + { + err = ASN1_DER_ERROR; + goto error; + } + max_len -= len2 + len3; + if (der != NULL && max_len >= 0) + memcpy (der + counter, p->value, len3 + len2); + counter += len3 + len2; + move = RIGHT; + break; + case ASN1_ETYPE_SEQUENCE: + case ASN1_ETYPE_SET: + if (move != UP) + { + p->tmp_ival = counter; + if (p->down == NULL) + { + move = UP; + continue; + } + else + { + p2 = p->down; + while (p2 && (type_field (p2->type) == ASN1_ETYPE_TAG)) + p2 = p2->right; + if (p2) + { + p = p2; + move = RIGHT; + continue; + } + move = UP; + continue; + } + } + else + { /* move==UP */ + len2 = p->tmp_ival; + p->tmp_ival = 0; + if ((type_field (p->type) == ASN1_ETYPE_SET) && (max_len >= 0)) + { + err = + _asn1_ordering_set (der ? der + len2 : &dummy, + counter - len2, p); + if (err != ASN1_SUCCESS) + goto error; + } + asn1_length_der (counter - len2, temp, &len3); + max_len -= len3; + if (der != NULL && max_len >= 0) + { + memmove (der + len2 + len3, der + len2, counter - len2); + memcpy (der + len2, temp, len3); + } + counter += len3; + move = RIGHT; + } + break; + case ASN1_ETYPE_SEQUENCE_OF: + case ASN1_ETYPE_SET_OF: + if (move != UP) + { + p->tmp_ival = counter; + p = p->down; + while ((type_field (p->type) == ASN1_ETYPE_TAG) + || (type_field (p->type) == ASN1_ETYPE_SIZE)) + p = p->right; + if (p->right) + { + p = p->right; + move = RIGHT; + continue; + } + else + p = _asn1_find_up (p); + move = UP; + } + if (move == UP) + { + len2 = p->tmp_ival; + p->tmp_ival = 0; + if ((type_field (p->type) == ASN1_ETYPE_SET_OF) + && (counter - len2 > 0) && (max_len >= 0)) + { + err = + _asn1_ordering_set_of (der ? der + len2 : &dummy, + counter - len2, p); + if (err != ASN1_SUCCESS) + goto error; + } + asn1_length_der (counter - len2, temp, &len3); + max_len -= len3; + if (der != NULL && max_len >= 0) + { + memmove (der + len2 + len3, der + len2, counter - len2); + memcpy (der + len2, temp, len3); + } + counter += len3; + move = RIGHT; + } + break; + case ASN1_ETYPE_ANY: + if (p->value == NULL) + { + _asn1_error_description_value_not_found (p, ErrorDescription); + err = ASN1_VALUE_NOT_FOUND; + goto error; + } + len2 = asn1_get_length_der (p->value, p->value_len, &len3); + if (len2 < 0) + { + err = ASN1_DER_ERROR; + goto error; + } + max_len -= len2; + if (der != NULL && max_len >= 0) + memcpy (der + counter, p->value + len3, len2); + counter += len2; + move = RIGHT; + break; + default: + move = (move == UP) ? RIGHT : DOWN; + break; + } + + if ((move != DOWN) && (counter != counter_old)) + { + p->end = counter - 1; + err = _asn1_complete_explicit_tag (p, der, &counter, &max_len); + if (err != ASN1_SUCCESS && err != ASN1_MEM_ERROR) + goto error; + } + + if (p == node && move != DOWN) + break; + + if (move == DOWN) + { + if (p->down) + p = p->down; + else + move = RIGHT; + } + if (move == RIGHT) + { + if (p->right) + p = p->right; + else + move = UP; + } + if (move == UP) + p = _asn1_find_up (p); + } + + *len = counter; + + if (max_len < 0) + { + err = ASN1_MEM_ERROR; + goto error; + } + + err = ASN1_SUCCESS; + +error: + asn1_delete_structure (&node); + return err; +} diff --git a/grub-core/lib/libtasn1/lib/decoding.c b/grub-core/lib/libtasn1/lib/decoding.c new file mode 100644 index 000000000..b1a35356f --- /dev/null +++ b/grub-core/lib/libtasn1/lib/decoding.c @@ -0,0 +1,2501 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + + +/*****************************************************/ +/* File: decoding.c */ +/* Description: Functions to manage DER decoding */ +/*****************************************************/ + +#include <int.h> +#include <parser_aux.h> +#include <gstr.h> +#include <structure.h> +#include <element.h> +#include <limits.h> +#include <intprops.h> +#include "c-ctype.h" + +#ifdef DEBUG +# define warn() fprintf(stderr, "%s: %d\n", __func__, __LINE__) +#else +# define warn() +#endif + +#define IS_ERR(len, flags) (len < -1 || ((flags & ASN1_DECODE_FLAG_STRICT_DER) && len < 0)) + +#define HAVE_TWO(x) (x>=2?1:0) + +/* Decoding flags (dflags) used in several decoding functions. + * DECODE_FLAG_HAVE_TAG: The provided buffer includes a tag + * DECODE_FLAG_CONSTRUCTED: The provided buffer is of indefinite encoding (useful + * when no tags are present). + * DECODE_FLAG_LEVEL1: Internal flag to indicate a level of recursion for BER strings. + * DECODE_FLAG_LEVEL2: Internal flag to indicate two levels of recursion for BER strings. + * DECODE_FLAG_LEVEL3: Internal flag to indicate three levels of recursion for BER strings. + * This is the maximum levels of recursion possible to prevent stack + * exhaustion. + */ + +#define DECODE_FLAG_HAVE_TAG 1 +#define DECODE_FLAG_CONSTRUCTED (1<<1) +#define DECODE_FLAG_LEVEL1 (1<<2) +#define DECODE_FLAG_LEVEL2 (1<<3) +#define DECODE_FLAG_LEVEL3 (1<<4) + +#define DECR_LEN(l, s) do { \ + l -= s; \ + if (l < 0) { \ + warn(); \ + result = ASN1_DER_ERROR; \ + goto cleanup; \ + } \ + } while (0) + +static int +_asn1_get_indefinite_length_string (const unsigned char *der, int der_len, + int *len); + +static int +_asn1_decode_simple_ber (unsigned int etype, const unsigned char *der, + unsigned int _der_len, unsigned char **str, + unsigned int *str_len, unsigned int *ber_len, + unsigned dflags); + +static int +_asn1_decode_simple_der (unsigned int etype, const unsigned char *der, + unsigned int _der_len, const unsigned char **str, + unsigned int *str_len, unsigned dflags); + +static void +_asn1_error_description_tag_error (asn1_node node, char *ErrorDescription) +{ + + Estrcpy (ErrorDescription, ":: tag error near element '"); + _asn1_hierarchical_name (node, ErrorDescription + strlen (ErrorDescription), + ASN1_MAX_ERROR_DESCRIPTION_SIZE - 40); + Estrcat (ErrorDescription, "'"); + +} + +/** + * asn1_get_length_der: + * @der: DER data to decode. + * @der_len: Length of DER data to decode. + * @len: Output variable containing the length of the DER length field. + * + * Extract a length field from DER data. + * + * Returns: Return the decoded length value, or -1 on indefinite + * length, or -2 when the value was too big to fit in a int, or -4 + * when the decoded length value plus @len would exceed @der_len. + **/ +long +asn1_get_length_der (const unsigned char *der, int der_len, int *len) +{ + unsigned int ans; + int k, punt, sum; + + *len = 0; + if (der_len <= 0) + return 0; + + if (!(der[0] & 128)) + { + /* short form */ + *len = 1; + ans = der[0]; + } + else + { + /* Long form */ + k = der[0] & 0x7F; + punt = 1; + if (k) + { /* definite length method */ + ans = 0; + while (punt <= k && punt < der_len) + { + if (INT_MULTIPLY_OVERFLOW (ans, 256)) + return -2; + ans *= 256; + + if (INT_ADD_OVERFLOW (ans, ((unsigned) der[punt]))) + return -2; + ans += der[punt]; + punt++; + } + } + else + { /* indefinite length method */ + *len = punt; + return -1; + } + + *len = punt; + } + + sum = ans; + if (ans >= INT_MAX || INT_ADD_OVERFLOW (sum, (*len))) + return -2; + sum += *len; + + if (sum > der_len) + return -4; + + return ans; +} + +/** + * asn1_get_tag_der: + * @der: DER data to decode. + * @der_len: Length of DER data to decode. + * @cls: Output variable containing decoded class. + * @len: Output variable containing the length of the DER TAG data. + * @tag: Output variable containing the decoded tag (may be %NULL). + * + * Decode the class and TAG from DER code. + * + * Returns: Returns %ASN1_SUCCESS on success, or an error. + **/ +int +asn1_get_tag_der (const unsigned char *der, int der_len, + unsigned char *cls, int *len, unsigned long *tag) +{ + unsigned int ris; + int punt; + + if (der == NULL || der_len < 2 || len == NULL) + return ASN1_DER_ERROR; + + *cls = der[0] & 0xE0; + if ((der[0] & 0x1F) != 0x1F) + { + /* short form */ + *len = 1; + ris = der[0] & 0x1F; + } + else + { + /* Long form */ + punt = 1; + ris = 0; + while (punt < der_len && der[punt] & 128) + { + + if (INT_MULTIPLY_OVERFLOW (ris, 128)) + return ASN1_DER_ERROR; + ris *= 128; + + if (INT_ADD_OVERFLOW (ris, ((unsigned) (der[punt] & 0x7F)))) + return ASN1_DER_ERROR; + ris += (der[punt] & 0x7F); + punt++; + } + + if (punt >= der_len) + return ASN1_DER_ERROR; + + if (INT_MULTIPLY_OVERFLOW (ris, 128)) + return ASN1_DER_ERROR; + ris *= 128; + + if (INT_ADD_OVERFLOW (ris, ((unsigned) (der[punt] & 0x7F)))) + return ASN1_DER_ERROR; + ris += (der[punt] & 0x7F); + punt++; + + *len = punt; + } + + if (tag) + *tag = ris; + return ASN1_SUCCESS; +} + +/** + * asn1_get_length_ber: + * @ber: BER data to decode. + * @ber_len: Length of BER data to decode. + * @len: Output variable containing the length of the BER length field. + * + * Extract a length field from BER data. The difference to + * asn1_get_length_der() is that this function will return a length + * even if the value has indefinite encoding. + * + * Returns: Return the decoded length value, or negative value when + * the value was too big. + * + * Since: 2.0 + **/ +long +asn1_get_length_ber (const unsigned char *ber, int ber_len, int *len) +{ + int ret; + long err; + + ret = asn1_get_length_der (ber, ber_len, len); + + if (ret == -1 && ber_len > 1) + { /* indefinite length method */ + err = _asn1_get_indefinite_length_string (ber + 1, ber_len - 1, &ret); + if (err != ASN1_SUCCESS) + return -3; + } + + return ret; +} + +/** + * asn1_get_octet_der: + * @der: DER data to decode containing the OCTET SEQUENCE. + * @der_len: The length of the @der data to decode. + * @ret_len: Output variable containing the encoded length of the DER data. + * @str: Pre-allocated output buffer to put decoded OCTET SEQUENCE in. + * @str_size: Length of pre-allocated output buffer. + * @str_len: Output variable containing the length of the contents of the OCTET SEQUENCE. + * + * Extract an OCTET SEQUENCE from DER data. Note that this function + * expects the DER data past the tag field, i.e., the length and + * content octets. + * + * Returns: Returns %ASN1_SUCCESS on success, or an error. + **/ +int +asn1_get_octet_der (const unsigned char *der, int der_len, + int *ret_len, unsigned char *str, int str_size, + int *str_len) +{ + int len_len = 0; + + if (der_len <= 0) + return ASN1_GENERIC_ERROR; + + *str_len = asn1_get_length_der (der, der_len, &len_len); + + if (*str_len < 0) + return ASN1_DER_ERROR; + + *ret_len = *str_len + len_len; + if (str_size >= *str_len) + { + if (*str_len > 0 && str != NULL) + memcpy (str, der + len_len, *str_len); + } + else + { + return ASN1_MEM_ERROR; + } + + return ASN1_SUCCESS; +} + + +/*- + * _asn1_get_time_der: + * @type: %ASN1_ETYPE_GENERALIZED_TIME or %ASN1_ETYPE_UTC_TIME + * @der: DER data to decode containing the time + * @der_len: Length of DER data to decode. + * @ret_len: Output variable containing the length of the DER data. + * @str: Pre-allocated output buffer to put the textual time in. + * @str_size: Length of pre-allocated output buffer. + * @flags: Zero or %ASN1_DECODE_FLAG_STRICT_DER + * + * Performs basic checks in the DER encoded time object and returns its textual form. + * The textual form will be in the YYYYMMDD000000Z format for GeneralizedTime + * and YYMMDD000000Z for UTCTime. + * + * Returns: %ASN1_SUCCESS on success, or an error. + -*/ +static int +_asn1_get_time_der (unsigned type, const unsigned char *der, int der_len, + int *ret_len, char *str, int str_size, unsigned flags) +{ + int len_len, str_len; + unsigned i; + unsigned sign_count = 0; + unsigned dot_count = 0; + const unsigned char *p; + + if (der_len <= 0 || str == NULL) + return ASN1_DER_ERROR; + + str_len = asn1_get_length_der (der, der_len, &len_len); + if (str_len <= 0 || str_size < str_len) + return ASN1_DER_ERROR; + + /* perform some sanity checks on the data */ + if (str_len < 8) + { + warn (); + return ASN1_TIME_ENCODING_ERROR; + } + + if ((flags & ASN1_DECODE_FLAG_STRICT_DER) + && !(flags & ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME)) + { + p = &der[len_len]; + for (i = 0; i < (unsigned) (str_len - 1); i++) + { + if (c_isdigit (p[i]) == 0) + { + if (type == ASN1_ETYPE_GENERALIZED_TIME) + { + /* tolerate lax encodings */ + if (p[i] == '.' && dot_count == 0) + { + dot_count++; + continue; + } + + /* This is not really valid DER, but there are + * structures using that */ + if (!(flags & ASN1_DECODE_FLAG_STRICT_DER) && + (p[i] == '+' || p[i] == '-') && sign_count == 0) + { + sign_count++; + continue; + } + } + + warn (); + return ASN1_TIME_ENCODING_ERROR; + } + } + + if (sign_count == 0 && p[str_len - 1] != 'Z') + { + warn (); + return ASN1_TIME_ENCODING_ERROR; + } + } + memcpy (str, der + len_len, str_len); + str[str_len] = 0; + *ret_len = str_len + len_len; + + return ASN1_SUCCESS; +} + +/** + * asn1_get_object_id_der: + * @der: DER data to decode containing the OBJECT IDENTIFIER + * @der_len: Length of DER data to decode. + * @ret_len: Output variable containing the length of the DER data. + * @str: Pre-allocated output buffer to put the textual object id in. + * @str_size: Length of pre-allocated output buffer. + * + * Converts a DER encoded object identifier to its textual form. This + * function expects the DER object identifier without the tag. + * + * Returns: %ASN1_SUCCESS on success, or an error. + **/ +int +asn1_get_object_id_der (const unsigned char *der, int der_len, int *ret_len, + char *str, int str_size) +{ + int len_len, len, k; + int leading, parsed; + char temp[LTOSTR_MAX_SIZE]; + uint64_t val, val1, val0; + + *ret_len = 0; + if (str && str_size > 0) + str[0] = 0; /* no oid */ + + if (str == NULL || der_len <= 0) + return ASN1_GENERIC_ERROR; + + len = asn1_get_length_der (der, der_len, &len_len); + + if (len <= 0 || len + len_len > der_len) + return ASN1_DER_ERROR; + + /* leading octet can never be 0x80 */ + if (der[len_len] == 0x80) + return ASN1_DER_ERROR; + + val0 = 0; + + for (k = 0; k < len; k++) + { + if (INT_LEFT_SHIFT_OVERFLOW (val0, 7)) + return ASN1_DER_ERROR; + + val0 <<= 7; + val0 |= der[len_len + k] & 0x7F; + if (!(der[len_len + k] & 0x80)) + break; + } + parsed = ++k; + + /* val0 = (X*40) + Y, X={0,1,2}, Y<=39 when X={0,1} */ + /* X = val, Y = val1 */ + + /* check if X == 0 */ + val = 0; + val1 = val0; + if (val1 > 39) + { + val = 1; + val1 = val0 - 40; + if (val1 > 39) + { + val = 2; + val1 = val0 - 80; + } + } + + _asn1_str_cpy (str, str_size, _asn1_ltostr (val, temp)); + _asn1_str_cat (str, str_size, "."); + _asn1_str_cat (str, str_size, _asn1_ltostr (val1, temp)); + + val = 0; + leading = 1; + for (k = parsed; k < len; k++) + { + /* X.690 mandates that the leading byte must never be 0x80 + */ + if (leading != 0 && der[len_len + k] == 0x80) + return ASN1_DER_ERROR; + leading = 0; + + /* check for wrap around */ + if (INT_LEFT_SHIFT_OVERFLOW (val, 7)) + return ASN1_DER_ERROR; + + val = val << 7; + val |= der[len_len + k] & 0x7F; + + if (!(der[len_len + k] & 0x80)) + { + _asn1_str_cat (str, str_size, "."); + _asn1_str_cat (str, str_size, _asn1_ltostr (val, temp)); + val = 0; + leading = 1; + } + } + + if (INT_ADD_OVERFLOW (len, len_len)) + return ASN1_DER_ERROR; + + *ret_len = len + len_len; + + return ASN1_SUCCESS; +} + +/** + * asn1_get_bit_der: + * @der: DER data to decode containing the BIT SEQUENCE. + * @der_len: Length of DER data to decode. + * @ret_len: Output variable containing the length of the DER data. + * @str: Pre-allocated output buffer to put decoded BIT SEQUENCE in. + * @str_size: Length of pre-allocated output buffer. + * @bit_len: Output variable containing the size of the BIT SEQUENCE. + * + * Extract a BIT SEQUENCE from DER data. + * + * Returns: %ASN1_SUCCESS on success, or an error. + **/ +int +asn1_get_bit_der (const unsigned char *der, int der_len, + int *ret_len, unsigned char *str, int str_size, + int *bit_len) +{ + int len_len = 0, len_byte; + + if (der_len <= 0) + return ASN1_GENERIC_ERROR; + + len_byte = asn1_get_length_der (der, der_len, &len_len) - 1; + if (len_byte < 0) + return ASN1_DER_ERROR; + + *ret_len = len_byte + len_len + 1; + *bit_len = len_byte * 8 - der[len_len]; + + if (*bit_len < 0) + return ASN1_DER_ERROR; + + if (str_size >= len_byte) + { + if (len_byte > 0 && str) + memcpy (str, der + len_len + 1, len_byte); + } + else + { + return ASN1_MEM_ERROR; + } + + return ASN1_SUCCESS; +} + +/* tag_len: the total tag length (explicit+inner) + * inner_tag_len: the inner_tag length + */ +static int +_asn1_extract_tag_der (asn1_node node, const unsigned char *der, int der_len, + int *tag_len, int *inner_tag_len, unsigned flags) +{ + asn1_node p; + int counter, len2, len3, is_tag_implicit; + int result; + unsigned long tag, tag_implicit = 0; + unsigned char class, class2, class_implicit = 0; + + if (der_len <= 0) + return ASN1_GENERIC_ERROR; + + counter = is_tag_implicit = 0; + + if (node->type & CONST_TAG) + { + p = node->down; + while (p) + { + if (type_field (p->type) == ASN1_ETYPE_TAG) + { + if (p->type & CONST_APPLICATION) + class2 = ASN1_CLASS_APPLICATION; + else if (p->type & CONST_UNIVERSAL) + class2 = ASN1_CLASS_UNIVERSAL; + else if (p->type & CONST_PRIVATE) + class2 = ASN1_CLASS_PRIVATE; + else + class2 = ASN1_CLASS_CONTEXT_SPECIFIC; + + if (p->type & CONST_EXPLICIT) + { + if (asn1_get_tag_der + (der + counter, der_len, &class, &len2, + &tag) != ASN1_SUCCESS) + return ASN1_DER_ERROR; + + DECR_LEN (der_len, len2); + counter += len2; + + if (flags & ASN1_DECODE_FLAG_STRICT_DER) + len3 = + asn1_get_length_der (der + counter, der_len, &len2); + else + len3 = + asn1_get_length_ber (der + counter, der_len, &len2); + if (len3 < 0) + return ASN1_DER_ERROR; + + DECR_LEN (der_len, len2); + counter += len2; + + if (!is_tag_implicit) + { + if ((class != (class2 | ASN1_CLASS_STRUCTURED)) || + (tag != strtoul ((char *) p->value, NULL, 10))) + return ASN1_TAG_ERROR; + } + else + { /* ASN1_TAG_IMPLICIT */ + if ((class != class_implicit) || (tag != tag_implicit)) + return ASN1_TAG_ERROR; + } + is_tag_implicit = 0; + } + else + { /* ASN1_TAG_IMPLICIT */ + if (!is_tag_implicit) + { + if ((type_field (node->type) == ASN1_ETYPE_SEQUENCE) || + (type_field (node->type) == ASN1_ETYPE_SEQUENCE_OF) + || (type_field (node->type) == ASN1_ETYPE_SET) + || (type_field (node->type) == ASN1_ETYPE_SET_OF)) + class2 |= ASN1_CLASS_STRUCTURED; + class_implicit = class2; + tag_implicit = strtoul ((char *) p->value, NULL, 10); + is_tag_implicit = 1; + } + } + } + p = p->right; + } + } + + if (is_tag_implicit) + { + if (asn1_get_tag_der + (der + counter, der_len, &class, &len2, &tag) != ASN1_SUCCESS) + return ASN1_DER_ERROR; + + DECR_LEN (der_len, len2); + + if ((class != class_implicit) || (tag != tag_implicit)) + { + if (type_field (node->type) == ASN1_ETYPE_OCTET_STRING) + { + class_implicit |= ASN1_CLASS_STRUCTURED; + if ((class != class_implicit) || (tag != tag_implicit)) + return ASN1_TAG_ERROR; + } + else + return ASN1_TAG_ERROR; + } + } + else + { + unsigned type = type_field (node->type); + if (type == ASN1_ETYPE_TAG) + { + *tag_len = 0; + if (inner_tag_len) + *inner_tag_len = 0; + return ASN1_SUCCESS; + } + + if (asn1_get_tag_der + (der + counter, der_len, &class, &len2, &tag) != ASN1_SUCCESS) + return ASN1_DER_ERROR; + + DECR_LEN (der_len, len2); + + switch (type) + { + case ASN1_ETYPE_NULL: + case ASN1_ETYPE_BOOLEAN: + case ASN1_ETYPE_INTEGER: + case ASN1_ETYPE_ENUMERATED: + case ASN1_ETYPE_OBJECT_ID: + case ASN1_ETYPE_GENERALSTRING: + case ASN1_ETYPE_NUMERIC_STRING: + case ASN1_ETYPE_IA5_STRING: + case ASN1_ETYPE_TELETEX_STRING: + case ASN1_ETYPE_PRINTABLE_STRING: + case ASN1_ETYPE_UNIVERSAL_STRING: + case ASN1_ETYPE_BMP_STRING: + case ASN1_ETYPE_UTF8_STRING: + case ASN1_ETYPE_VISIBLE_STRING: + case ASN1_ETYPE_BIT_STRING: + case ASN1_ETYPE_SEQUENCE: + case ASN1_ETYPE_SEQUENCE_OF: + case ASN1_ETYPE_SET: + case ASN1_ETYPE_SET_OF: + case ASN1_ETYPE_GENERALIZED_TIME: + case ASN1_ETYPE_UTC_TIME: + if ((class != _asn1_tags[type].class) + || (tag != _asn1_tags[type].tag)) + return ASN1_DER_ERROR; + break; + + case ASN1_ETYPE_OCTET_STRING: + /* OCTET STRING is handled differently to allow + * BER encodings (structured class). */ + if (((class != ASN1_CLASS_UNIVERSAL) + && (class != (ASN1_CLASS_UNIVERSAL | ASN1_CLASS_STRUCTURED))) + || (tag != ASN1_TAG_OCTET_STRING)) + return ASN1_DER_ERROR; + break; + case ASN1_ETYPE_ANY: + counter -= len2; + break; + case ASN1_ETYPE_CHOICE: + counter -= len2; + break; + default: + return ASN1_DER_ERROR; + break; + } + } + + counter += len2; + *tag_len = counter; + if (inner_tag_len) + *inner_tag_len = len2; + return ASN1_SUCCESS; + +cleanup: + return result; +} + +static int +extract_tag_der_recursive (asn1_node node, const unsigned char *der, + int der_len, int *ret_len, int *inner_len, + unsigned flags) +{ + asn1_node p; + int ris = ASN1_DER_ERROR; + + if (type_field (node->type) == ASN1_ETYPE_CHOICE) + { + p = node->down; + while (p) + { + ris = + _asn1_extract_tag_der (p, der, der_len, ret_len, inner_len, + flags); + if (ris == ASN1_SUCCESS) + break; + p = p->right; + } + + *ret_len = 0; + return ris; + } + else + return _asn1_extract_tag_der (node, der, der_len, ret_len, inner_len, + flags); +} + +static int +_asn1_delete_not_used (asn1_node node) +{ + asn1_node p, p2; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = node; + while (p) + { + if (p->type & CONST_NOT_USED) + { + p2 = NULL; + if (p != node) + { + p2 = _asn1_find_left (p); + if (!p2) + p2 = _asn1_find_up (p); + } + asn1_delete_structure (&p); + p = p2; + } + + if (!p) + break; /* reach node */ + + if (p->down) + { + p = p->down; + } + else + { + if (p == node) + p = NULL; + else if (p->right) + p = p->right; + else + { + while (1) + { + p = _asn1_find_up (p); + if (p == node) + { + p = NULL; + break; + } + if (p->right) + { + p = p->right; + break; + } + } + } + } + } + return ASN1_SUCCESS; +} + +static int +_asn1_get_indefinite_length_string (const unsigned char *der, + int der_len, int *len) +{ + int len2, len3, counter, indefinite; + int result; + unsigned long tag; + unsigned char class; + + counter = indefinite = 0; + + while (1) + { + if (HAVE_TWO (der_len) && (der[counter] == 0) + && (der[counter + 1] == 0)) + { + counter += 2; + DECR_LEN (der_len, 2); + + indefinite--; + if (indefinite <= 0) + break; + else + continue; + } + + if (asn1_get_tag_der + (der + counter, der_len, &class, &len2, &tag) != ASN1_SUCCESS) + return ASN1_DER_ERROR; + + DECR_LEN (der_len, len2); + counter += len2; + + len2 = asn1_get_length_der (der + counter, der_len, &len3); + if (len2 < -1) + return ASN1_DER_ERROR; + + if (len2 == -1) + { + indefinite++; + counter += 1; + DECR_LEN (der_len, 1); + } + else + { + counter += len2 + len3; + DECR_LEN (der_len, len2 + len3); + } + } + + *len = counter; + return ASN1_SUCCESS; + +cleanup: + return result; +} + +static void +delete_unneeded_choice_fields (asn1_node p) +{ + asn1_node p2; + + while (p->right) + { + p2 = p->right; + asn1_delete_structure (&p2); + } +} + + +/** + * asn1_der_decoding2 + * @element: pointer to an ASN1 structure. + * @ider: vector that contains the DER encoding. + * @max_ider_len: pointer to an integer giving the information about the + * maximal number of bytes occupied by *@ider. The real size of the DER + * encoding is returned through this pointer. + * @flags: flags controlling the behaviour of the function. + * @errorDescription: null-terminated string contains details when an + * error occurred. + * + * Fill the structure *@element with values of a DER encoding string. The + * structure must just be created with function asn1_create_element(). + * + * If %ASN1_DECODE_FLAG_ALLOW_PADDING flag is set then the function will ignore + * padding after the decoded DER data. Upon a successful return the value of + * *@max_ider_len will be set to the number of bytes decoded. + * + * If %ASN1_DECODE_FLAG_STRICT_DER flag is set then the function will + * not decode any BER-encoded elements. + * + * Returns: %ASN1_SUCCESS if DER encoding OK, %ASN1_ELEMENT_NOT_FOUND + * if @ELEMENT is %NULL, and %ASN1_TAG_ERROR or + * %ASN1_DER_ERROR if the der encoding doesn't match the structure + * name (*@ELEMENT deleted). + **/ +int +asn1_der_decoding2 (asn1_node * element, const void *ider, int *max_ider_len, + unsigned int flags, char *errorDescription) +{ + asn1_node node, p, p2, p3; + char temp[128]; + int counter, len2, len3, len4, move, ris, tlen; + struct node_tail_cache_st tcache = { NULL, NULL }; + unsigned char class; + unsigned long tag; + int tag_len; + int indefinite, result, total_len = *max_ider_len, ider_len = *max_ider_len; + int inner_tag_len; + unsigned char *ptmp; + const unsigned char *ptag; + const unsigned char *der = ider; + + node = *element; + + if (errorDescription != NULL) + errorDescription[0] = 0; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + if (node->type & CONST_OPTION) + { + result = ASN1_GENERIC_ERROR; + warn (); + goto cleanup; + } + + counter = 0; + move = DOWN; + p = node; + while (1) + { + tag_len = 0; + inner_tag_len = 0; + ris = ASN1_SUCCESS; + if (move != UP) + { + if (p->type & CONST_SET) + { + p2 = _asn1_find_up (p); + len2 = p2->tmp_ival; + if (len2 == -1) + { + if (HAVE_TWO (ider_len) && !der[counter] + && !der[counter + 1]) + { + p = p2; + move = UP; + counter += 2; + DECR_LEN (ider_len, 2); + continue; + } + } + else if (counter == len2) + { + p = p2; + move = UP; + continue; + } + else if (counter > len2) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + p2 = p2->down; + while (p2) + { + if ((p2->type & CONST_SET) && (p2->type & CONST_NOT_USED)) + { + ris = + extract_tag_der_recursive (p2, der + counter, + ider_len, &len2, NULL, + flags); + if (ris == ASN1_SUCCESS) + { + p2->type &= ~CONST_NOT_USED; + p = p2; + break; + } + } + p2 = p2->right; + } + if (p2 == NULL) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + } + + /* the position in the DER structure this starts */ + p->start = counter; + p->end = total_len - 1; + + if ((p->type & CONST_OPTION) || (p->type & CONST_DEFAULT)) + { + p2 = _asn1_find_up (p); + len2 = p2->tmp_ival; + if (counter == len2) + { + if (p->right) + { + p2 = p->right; + move = RIGHT; + } + else + move = UP; + + if (p->type & CONST_OPTION) + asn1_delete_structure (&p); + + p = p2; + continue; + } + } + + if (type_field (p->type) == ASN1_ETYPE_CHOICE) + { + while (p->down) + { + ris = + extract_tag_der_recursive (p->down, der + counter, + ider_len, &len2, NULL, flags); + + if (ris == ASN1_SUCCESS) + { + delete_unneeded_choice_fields (p->down); + break; + } + else if (ris == ASN1_ERROR_TYPE_ANY) + { + result = ASN1_ERROR_TYPE_ANY; + warn (); + goto cleanup; + } + else + { + p2 = p->down; + asn1_delete_structure (&p2); + } + } + + if (p->down == NULL) + { + if (!(p->type & CONST_OPTION)) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + } + else if (type_field (p->type) != ASN1_ETYPE_CHOICE) + p = p->down; + + p->start = counter; + } + + if ((p->type & CONST_OPTION) || (p->type & CONST_DEFAULT)) + { + p2 = _asn1_find_up (p); + len2 = p2->tmp_ival; + + if ((len2 != -1) && (counter > len2)) + ris = ASN1_TAG_ERROR; + } + + if (ris == ASN1_SUCCESS) + ris = + extract_tag_der_recursive (p, der + counter, ider_len, + &tag_len, &inner_tag_len, flags); + + if (ris != ASN1_SUCCESS) + { + if (p->type & CONST_OPTION) + { + p->type |= CONST_NOT_USED; + move = RIGHT; + } + else if (p->type & CONST_DEFAULT) + { + _asn1_set_value (p, NULL, 0); + move = RIGHT; + } + else + { + if (errorDescription != NULL) + _asn1_error_description_tag_error (p, errorDescription); + + result = ASN1_TAG_ERROR; + warn (); + goto cleanup; + } + } + else + { + DECR_LEN (ider_len, tag_len); + counter += tag_len; + } + } + + if (ris == ASN1_SUCCESS) + { + switch (type_field (p->type)) + { + case ASN1_ETYPE_NULL: + DECR_LEN (ider_len, 1); + if (der[counter]) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + counter++; + move = RIGHT; + break; + case ASN1_ETYPE_BOOLEAN: + DECR_LEN (ider_len, 2); + + if (der[counter++] != 1) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + if (der[counter++] == 0) + _asn1_set_value (p, "F", 1); + else + _asn1_set_value (p, "T", 1); + move = RIGHT; + break; + case ASN1_ETYPE_INTEGER: + case ASN1_ETYPE_ENUMERATED: + len2 = asn1_get_length_der (der + counter, ider_len, &len3); + if (len2 < 0) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len3 + len2); + + _asn1_set_value (p, der + counter, len3 + len2); + counter += len3 + len2; + move = RIGHT; + break; + case ASN1_ETYPE_OBJECT_ID: + result = + asn1_get_object_id_der (der + counter, ider_len, &len2, + temp, sizeof (temp)); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len2); + + tlen = strlen (temp); + if (tlen > 0) + _asn1_set_value (p, temp, tlen + 1); + + counter += len2; + move = RIGHT; + break; + case ASN1_ETYPE_GENERALIZED_TIME: + case ASN1_ETYPE_UTC_TIME: + result = + _asn1_get_time_der (type_field (p->type), der + counter, + ider_len, &len2, temp, sizeof (temp) - 1, + flags); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len2); + + tlen = strlen (temp); + if (tlen > 0) + _asn1_set_value (p, temp, tlen); + + counter += len2; + move = RIGHT; + break; + case ASN1_ETYPE_OCTET_STRING: + if (counter < inner_tag_len) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + ptag = der + counter - inner_tag_len; + if ((flags & ASN1_DECODE_FLAG_STRICT_DER) + || !(ptag[0] & ASN1_CLASS_STRUCTURED)) + { + if (ptag[0] & ASN1_CLASS_STRUCTURED) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + len2 = asn1_get_length_der (der + counter, ider_len, &len3); + if (len2 < 0) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len3 + len2); + + _asn1_set_value (p, der + counter, len3 + len2); + counter += len3 + len2; + } + else + { + unsigned dflags = 0, vlen, ber_len; + + if (ptag[0] & ASN1_CLASS_STRUCTURED) + dflags |= DECODE_FLAG_CONSTRUCTED; + + result = + _asn1_decode_simple_ber (type_field (p->type), + der + counter, ider_len, &ptmp, + &vlen, &ber_len, dflags); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, ber_len); + + _asn1_set_value_lv (p, ptmp, vlen); + + counter += ber_len; + free (ptmp); + } + move = RIGHT; + break; + case ASN1_ETYPE_GENERALSTRING: + case ASN1_ETYPE_NUMERIC_STRING: + case ASN1_ETYPE_IA5_STRING: + case ASN1_ETYPE_TELETEX_STRING: + case ASN1_ETYPE_PRINTABLE_STRING: + case ASN1_ETYPE_UNIVERSAL_STRING: + case ASN1_ETYPE_BMP_STRING: + case ASN1_ETYPE_UTF8_STRING: + case ASN1_ETYPE_VISIBLE_STRING: + case ASN1_ETYPE_BIT_STRING: + len2 = asn1_get_length_der (der + counter, ider_len, &len3); + if (len2 < 0) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len3 + len2); + + _asn1_set_value (p, der + counter, len3 + len2); + counter += len3 + len2; + move = RIGHT; + break; + case ASN1_ETYPE_SEQUENCE: + case ASN1_ETYPE_SET: + if (move == UP) + { + len2 = p->tmp_ival; + p->tmp_ival = 0; + if (len2 == -1) + { /* indefinite length method */ + DECR_LEN (ider_len, 2); + if ((der[counter]) || der[counter + 1]) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + counter += 2; + } + else + { /* definite length method */ + if (len2 != counter) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + } + move = RIGHT; + } + else + { /* move==DOWN || move==RIGHT */ + len3 = asn1_get_length_der (der + counter, ider_len, &len2); + if (IS_ERR (len3, flags)) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len2); + counter += len2; + + if (len3 > 0) + { + p->tmp_ival = counter + len3; + move = DOWN; + } + else if (len3 == 0) + { + p2 = p->down; + while (p2) + { + if (type_field (p2->type) != ASN1_ETYPE_TAG) + { + p3 = p2->right; + asn1_delete_structure (&p2); + p2 = p3; + } + else + p2 = p2->right; + } + move = RIGHT; + } + else + { /* indefinite length method */ + p->tmp_ival = -1; + move = DOWN; + } + } + break; + case ASN1_ETYPE_SEQUENCE_OF: + case ASN1_ETYPE_SET_OF: + if (move == UP) + { + len2 = p->tmp_ival; + if (len2 == -1) + { /* indefinite length method */ + if (!HAVE_TWO (ider_len) + || ((der[counter]) || der[counter + 1])) + { + result = _asn1_append_sequence_set (p, &tcache); + if (result != 0) + { + warn (); + goto cleanup; + } + p = tcache.tail; + move = RIGHT; + continue; + } + + p->tmp_ival = 0; + tcache.tail = NULL; /* finished decoding this structure */ + tcache.head = NULL; + DECR_LEN (ider_len, 2); + counter += 2; + } + else + { /* definite length method */ + if (len2 > counter) + { + result = _asn1_append_sequence_set (p, &tcache); + if (result != 0) + { + warn (); + goto cleanup; + } + p = tcache.tail; + move = RIGHT; + continue; + } + + p->tmp_ival = 0; + tcache.tail = NULL; /* finished decoding this structure */ + tcache.head = NULL; + + if (len2 != counter) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + } + } + else + { /* move==DOWN || move==RIGHT */ + len3 = asn1_get_length_der (der + counter, ider_len, &len2); + if (IS_ERR (len3, flags)) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len2); + counter += len2; + if (len3) + { + if (len3 > 0) + { /* definite length method */ + p->tmp_ival = counter + len3; + } + else + { /* indefinite length method */ + p->tmp_ival = -1; + } + + p2 = p->down; + if (p2 == NULL) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + while ((type_field (p2->type) == ASN1_ETYPE_TAG) + || (type_field (p2->type) == ASN1_ETYPE_SIZE)) + p2 = p2->right; + if (p2->right == NULL) + { + result = _asn1_append_sequence_set (p, &tcache); + if (result != 0) + { + warn (); + goto cleanup; + } + } + p = p2; + } + } + move = RIGHT; + break; + case ASN1_ETYPE_ANY: + /* Check indefinite lenth method in an EXPLICIT TAG */ + + if (!(flags & ASN1_DECODE_FLAG_STRICT_DER) + && (p->type & CONST_TAG) && tag_len == 2 + && (der[counter - 1] == 0x80)) + indefinite = 1; + else + indefinite = 0; + + if (asn1_get_tag_der + (der + counter, ider_len, &class, &len2, + &tag) != ASN1_SUCCESS) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len2); + + len4 = + asn1_get_length_der (der + counter + len2, ider_len, &len3); + if (IS_ERR (len4, flags)) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + if (len4 != -1) /* definite */ + { + len2 += len4; + + DECR_LEN (ider_len, len4 + len3); + _asn1_set_value_lv (p, der + counter, len2 + len3); + counter += len2 + len3; + } + else /* == -1 */ + { /* indefinite length */ + ider_len += len2; /* undo DECR_LEN */ + + if (counter == 0) + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + + result = + _asn1_get_indefinite_length_string (der + counter, + ider_len, &len2); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + DECR_LEN (ider_len, len2); + _asn1_set_value_lv (p, der + counter, len2); + counter += len2; + + } + + /* Check if a couple of 0x00 are present due to an EXPLICIT TAG with + an indefinite length method. */ + if (indefinite) + { + DECR_LEN (ider_len, 2); + if (!der[counter] && !der[counter + 1]) + { + counter += 2; + } + else + { + result = ASN1_DER_ERROR; + warn (); + goto cleanup; + } + } + + move = RIGHT; + break; + default: + move = (move == UP) ? RIGHT : DOWN; + break; + } + } + + if (p) + { + p->end = counter - 1; + } + + if (p == node && move != DOWN) + break; + + if (move == DOWN) + { + if (p->down) + p = p->down; + else + move = RIGHT; + } + if ((move == RIGHT) && !(p->type & CONST_SET)) + { + if (p->right) + p = p->right; + else + move = UP; + } + if (move == UP) + p = _asn1_find_up (p); + } + + _asn1_delete_not_used (*element); + + if ((ider_len < 0) || + (!(flags & ASN1_DECODE_FLAG_ALLOW_PADDING) && (ider_len != 0))) + { + warn (); + result = ASN1_DER_ERROR; + goto cleanup; + } + + *max_ider_len = total_len - ider_len; + + return ASN1_SUCCESS; + +cleanup: + asn1_delete_structure (element); + return result; +} + + +/** + * asn1_der_decoding: + * @element: pointer to an ASN1 structure. + * @ider: vector that contains the DER encoding. + * @ider_len: number of bytes of *@ider: @ider[0]..@ider[len-1]. + * @errorDescription: null-terminated string contains details when an + * error occurred. + * + * Fill the structure *@element with values of a DER encoding + * string. The structure must just be created with function + * asn1_create_element(). + * + * Note that the *@element variable is provided as a pointer for + * historical reasons. + * + * Returns: %ASN1_SUCCESS if DER encoding OK, %ASN1_ELEMENT_NOT_FOUND + * if @ELEMENT is %NULL, and %ASN1_TAG_ERROR or + * %ASN1_DER_ERROR if the der encoding doesn't match the structure + * name (*@ELEMENT deleted). + **/ +int +asn1_der_decoding (asn1_node * element, const void *ider, int ider_len, + char *errorDescription) +{ + return asn1_der_decoding2 (element, ider, &ider_len, 0, errorDescription); +} + +/** + * asn1_der_decoding_element: + * @structure: pointer to an ASN1 structure + * @elementName: name of the element to fill + * @ider: vector that contains the DER encoding of the whole structure. + * @len: number of bytes of *der: der[0]..der[len-1] + * @errorDescription: null-terminated string contains details when an + * error occurred. + * + * Fill the element named @ELEMENTNAME with values of a DER encoding + * string. The structure must just be created with function + * asn1_create_element(). The DER vector must contain the encoding + * string of the whole @STRUCTURE. If an error occurs during the + * decoding procedure, the *@STRUCTURE is deleted and set equal to + * %NULL. + * + * This function is deprecated and may just be an alias to asn1_der_decoding + * in future versions. Use asn1_der_decoding() instead. + * + * Returns: %ASN1_SUCCESS if DER encoding OK, %ASN1_ELEMENT_NOT_FOUND + * if ELEMENT is %NULL or @elementName == NULL, and + * %ASN1_TAG_ERROR or %ASN1_DER_ERROR if the der encoding doesn't + * match the structure @structure (*ELEMENT deleted). + **/ +int +asn1_der_decoding_element (asn1_node * structure, const char *elementName, + const void *ider, int len, char *errorDescription) +{ + return asn1_der_decoding (structure, ider, len, errorDescription); +} + +/** + * asn1_der_decoding_startEnd: + * @element: pointer to an ASN1 element + * @ider: vector that contains the DER encoding. + * @ider_len: number of bytes of *@ider: @ider[0]..@ider[len-1] + * @name_element: an element of NAME structure. + * @start: the position of the first byte of NAME_ELEMENT decoding + * (@ider[*start]) + * @end: the position of the last byte of NAME_ELEMENT decoding + * (@ider[*end]) + * + * Find the start and end point of an element in a DER encoding + * string. I mean that if you have a der encoding and you have already + * used the function asn1_der_decoding() to fill a structure, it may + * happen that you want to find the piece of string concerning an + * element of the structure. + * + * One example is the sequence "tbsCertificate" inside an X509 + * certificate. + * + * Note that since libtasn1 3.7 the @ider and @ider_len parameters + * can be omitted, if the element is already decoded using asn1_der_decoding(). + * + * Returns: %ASN1_SUCCESS if DER encoding OK, %ASN1_ELEMENT_NOT_FOUND + * if ELEMENT is %asn1_node EMPTY or @name_element is not a valid + * element, %ASN1_TAG_ERROR or %ASN1_DER_ERROR if the der encoding + * doesn't match the structure ELEMENT. + **/ +int +asn1_der_decoding_startEnd (asn1_node element, const void *ider, int ider_len, + const char *name_element, int *start, int *end) +{ + asn1_node node, node_to_find; + int result = ASN1_DER_ERROR; + + node = element; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + node_to_find = asn1_find_node (node, name_element); + + if (node_to_find == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + *start = node_to_find->start; + *end = node_to_find->end; + + if (*start == 0 && *end == 0) + { + if (ider == NULL || ider_len == 0) + return ASN1_GENERIC_ERROR; + + /* it seems asn1_der_decoding() wasn't called before. Do it now */ + result = asn1_der_decoding (&node, ider, ider_len, NULL); + if (result != ASN1_SUCCESS) + { + warn (); + return result; + } + + node_to_find = asn1_find_node (node, name_element); + if (node_to_find == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + *start = node_to_find->start; + *end = node_to_find->end; + } + + if (*end < *start) + return ASN1_GENERIC_ERROR; + + return ASN1_SUCCESS; +} + +/** + * asn1_expand_any_defined_by: + * @definitions: ASN1 definitions + * @element: pointer to an ASN1 structure + * + * Expands every "ANY DEFINED BY" element of a structure created from + * a DER decoding process (asn1_der_decoding function). The element + * ANY must be defined by an OBJECT IDENTIFIER. The type used to + * expand the element ANY is the first one following the definition of + * the actual value of the OBJECT IDENTIFIER. + * + * Returns: %ASN1_SUCCESS if Substitution OK, %ASN1_ERROR_TYPE_ANY if + * some "ANY DEFINED BY" element couldn't be expanded due to a + * problem in OBJECT_ID -> TYPE association, or other error codes + * depending on DER decoding. + **/ +int +asn1_expand_any_defined_by (asn1_node_const definitions, asn1_node * element) +{ + char name[2 * ASN1_MAX_NAME_SIZE + 2], value[ASN1_MAX_NAME_SIZE]; + int retCode = ASN1_SUCCESS, result; + int len, len2, len3; + asn1_node_const p2; + asn1_node p, p3, aux = NULL; + char errorDescription[ASN1_MAX_ERROR_DESCRIPTION_SIZE]; + const char *definitionsName; + + if ((definitions == NULL) || (*element == NULL)) + return ASN1_ELEMENT_NOT_FOUND; + + definitionsName = definitions->name; + + p = *element; + while (p) + { + + switch (type_field (p->type)) + { + case ASN1_ETYPE_ANY: + if ((p->type & CONST_DEFINED_BY) && (p->value)) + { + /* search the "DEF_BY" element */ + p2 = p->down; + while ((p2) && (type_field (p2->type) != ASN1_ETYPE_CONSTANT)) + p2 = p2->right; + + if (!p2) + { + retCode = ASN1_ERROR_TYPE_ANY; + break; + } + + p3 = _asn1_find_up (p); + + if (!p3) + { + retCode = ASN1_ERROR_TYPE_ANY; + break; + } + + p3 = p3->down; + while (p3) + { + if (!(strcmp (p3->name, p2->name))) + break; + p3 = p3->right; + } + + if ((!p3) || (type_field (p3->type) != ASN1_ETYPE_OBJECT_ID) || + (p3->value == NULL)) + { + + p3 = _asn1_find_up (p); + p3 = _asn1_find_up (p3); + + if (!p3) + { + retCode = ASN1_ERROR_TYPE_ANY; + break; + } + + p3 = p3->down; + + while (p3) + { + if (!(strcmp (p3->name, p2->name))) + break; + p3 = p3->right; + } + + if ((!p3) || (type_field (p3->type) != ASN1_ETYPE_OBJECT_ID) + || (p3->value == NULL)) + { + retCode = ASN1_ERROR_TYPE_ANY; + break; + } + } + + /* search the OBJECT_ID into definitions */ + p2 = definitions->down; + while (p2) + { + if ((type_field (p2->type) == ASN1_ETYPE_OBJECT_ID) && + (p2->type & CONST_ASSIGN)) + { + snprintf (name, sizeof (name), "%s.%s", definitionsName, + p2->name); + + len = ASN1_MAX_NAME_SIZE; + result = + asn1_read_value (definitions, name, value, &len); + + if ((result == ASN1_SUCCESS) + && (!_asn1_strcmp (p3->value, value))) + { + p2 = p2->right; /* pointer to the structure to + use for expansion */ + while ((p2) && (p2->type & CONST_ASSIGN)) + p2 = p2->right; + + if (p2) + { + snprintf (name, sizeof (name), "%s.%s", + definitionsName, p2->name); + + result = + asn1_create_element (definitions, name, &aux); + if (result == ASN1_SUCCESS) + { + _asn1_cpy_name (aux, p); + len2 = + asn1_get_length_der (p->value, + p->value_len, &len3); + if (len2 < 0) + return ASN1_DER_ERROR; + + result = + asn1_der_decoding (&aux, p->value + len3, + len2, + errorDescription); + if (result == ASN1_SUCCESS) + { + + _asn1_set_right (aux, p->right); + _asn1_set_right (p, aux); + + result = asn1_delete_structure (&p); + if (result == ASN1_SUCCESS) + { + p = aux; + aux = NULL; + break; + } + else + { /* error with asn1_delete_structure */ + asn1_delete_structure (&aux); + retCode = result; + break; + } + } + else + { /* error with asn1_der_decoding */ + retCode = result; + break; + } + } + else + { /* error with asn1_create_element */ + retCode = result; + break; + } + } + else + { /* error with the pointer to the structure to exapand */ + retCode = ASN1_ERROR_TYPE_ANY; + break; + } + } + } + p2 = p2->right; + } /* end while */ + + if (!p2) + { + retCode = ASN1_ERROR_TYPE_ANY; + break; + } + + } + break; + default: + break; + } + + + if (p->down) + { + p = p->down; + } + else if (p == *element) + { + p = NULL; + break; + } + else if (p->right) + p = p->right; + else + { + while (1) + { + p = _asn1_find_up (p); + if (p == *element) + { + p = NULL; + break; + } + if (p->right) + { + p = p->right; + break; + } + } + } + } + + return retCode; +} + +/** + * asn1_expand_octet_string: + * @definitions: ASN1 definitions + * @element: pointer to an ASN1 structure + * @octetName: name of the OCTECT STRING field to expand. + * @objectName: name of the OBJECT IDENTIFIER field to use to define + * the type for expansion. + * + * Expands an "OCTET STRING" element of a structure created from a DER + * decoding process (the asn1_der_decoding() function). The type used + * for expansion is the first one following the definition of the + * actual value of the OBJECT IDENTIFIER indicated by OBJECTNAME. + * + * Returns: %ASN1_SUCCESS if substitution OK, %ASN1_ELEMENT_NOT_FOUND + * if @objectName or @octetName are not correct, + * %ASN1_VALUE_NOT_VALID if it wasn't possible to find the type to + * use for expansion, or other errors depending on DER decoding. + **/ +int +asn1_expand_octet_string (asn1_node_const definitions, asn1_node * element, + const char *octetName, const char *objectName) +{ + char name[2 * ASN1_MAX_NAME_SIZE + 1], value[ASN1_MAX_NAME_SIZE]; + int retCode = ASN1_SUCCESS, result; + int len, len2, len3; + asn1_node_const p2; + asn1_node aux = NULL; + asn1_node octetNode = NULL, objectNode = NULL; + char errorDescription[ASN1_MAX_ERROR_DESCRIPTION_SIZE]; + + if ((definitions == NULL) || (*element == NULL)) + return ASN1_ELEMENT_NOT_FOUND; + + octetNode = asn1_find_node (*element, octetName); + if (octetNode == NULL) + return ASN1_ELEMENT_NOT_FOUND; + if (type_field (octetNode->type) != ASN1_ETYPE_OCTET_STRING) + return ASN1_ELEMENT_NOT_FOUND; + if (octetNode->value == NULL) + return ASN1_VALUE_NOT_FOUND; + + objectNode = asn1_find_node (*element, objectName); + if (objectNode == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + if (type_field (objectNode->type) != ASN1_ETYPE_OBJECT_ID) + return ASN1_ELEMENT_NOT_FOUND; + + if (objectNode->value == NULL) + return ASN1_VALUE_NOT_FOUND; + + + /* search the OBJECT_ID into definitions */ + p2 = definitions->down; + while (p2) + { + if ((type_field (p2->type) == ASN1_ETYPE_OBJECT_ID) && + (p2->type & CONST_ASSIGN)) + { + strcpy (name, definitions->name); + strcat (name, "."); + strcat (name, p2->name); + + len = sizeof (value); + result = asn1_read_value (definitions, name, value, &len); + + if ((result == ASN1_SUCCESS) + && (!_asn1_strcmp (objectNode->value, value))) + { + + p2 = p2->right; /* pointer to the structure to + use for expansion */ + while ((p2) && (p2->type & CONST_ASSIGN)) + p2 = p2->right; + + if (p2) + { + strcpy (name, definitions->name); + strcat (name, "."); + strcat (name, p2->name); + + result = asn1_create_element (definitions, name, &aux); + if (result == ASN1_SUCCESS) + { + _asn1_cpy_name (aux, octetNode); + len2 = + asn1_get_length_der (octetNode->value, + octetNode->value_len, &len3); + if (len2 < 0) + return ASN1_DER_ERROR; + + result = + asn1_der_decoding (&aux, octetNode->value + len3, + len2, errorDescription); + if (result == ASN1_SUCCESS) + { + + _asn1_set_right (aux, octetNode->right); + _asn1_set_right (octetNode, aux); + + result = asn1_delete_structure (&octetNode); + if (result == ASN1_SUCCESS) + { + aux = NULL; + break; + } + else + { /* error with asn1_delete_structure */ + asn1_delete_structure (&aux); + retCode = result; + break; + } + } + else + { /* error with asn1_der_decoding */ + retCode = result; + break; + } + } + else + { /* error with asn1_create_element */ + retCode = result; + break; + } + } + else + { /* error with the pointer to the structure to exapand */ + retCode = ASN1_VALUE_NOT_VALID; + break; + } + } + } + + p2 = p2->right; + + } + + if (!p2) + retCode = ASN1_VALUE_NOT_VALID; + + return retCode; +} + +/*- + * _asn1_decode_simple_der: + * @etype: The type of the string to be encoded (ASN1_ETYPE_) + * @der: the encoded string + * @_der_len: the bytes of the encoded string + * @str: a pointer to the data + * @str_len: the length of the data + * @dflags: DECODE_FLAG_* + * + * Decodes a simple DER encoded type (e.g. a string, which is not constructed). + * The output is a pointer inside the @der. + * + * Returns: %ASN1_SUCCESS if successful or an error value. + -*/ +static int +_asn1_decode_simple_der (unsigned int etype, const unsigned char *der, + unsigned int _der_len, const unsigned char **str, + unsigned int *str_len, unsigned dflags) +{ + int tag_len, len_len; + const unsigned char *p; + int der_len = _der_len; + unsigned char class; + unsigned long tag; + long ret; + + if (der == NULL || der_len == 0) + return ASN1_VALUE_NOT_VALID; + + if (ETYPE_OK (etype) == 0 || ETYPE_IS_STRING (etype) == 0) + return ASN1_VALUE_NOT_VALID; + + /* doesn't handle constructed classes */ + class = ETYPE_CLASS (etype); + if (class != ASN1_CLASS_UNIVERSAL) + return ASN1_VALUE_NOT_VALID; + + p = der; + + if (dflags & DECODE_FLAG_HAVE_TAG) + { + ret = asn1_get_tag_der (p, der_len, &class, &tag_len, &tag); + if (ret != ASN1_SUCCESS) + return ret; + + if (class != ETYPE_CLASS (etype) || tag != ETYPE_TAG (etype)) + { + warn (); + return ASN1_DER_ERROR; + } + + p += tag_len; + der_len -= tag_len; + if (der_len <= 0) + return ASN1_DER_ERROR; + } + + ret = asn1_get_length_der (p, der_len, &len_len); + if (ret < 0) + return ASN1_DER_ERROR; + + p += len_len; + der_len -= len_len; + if (der_len <= 0) + return ASN1_DER_ERROR; + + *str_len = ret; + *str = p; + + return ASN1_SUCCESS; +} + +/** + * asn1_decode_simple_der: + * @etype: The type of the string to be encoded (ASN1_ETYPE_) + * @der: the encoded string + * @_der_len: the bytes of the encoded string + * @str: a pointer to the data + * @str_len: the length of the data + * + * Decodes a simple DER encoded type (e.g. a string, which is not constructed). + * The output is a pointer inside the @der. + * + * Returns: %ASN1_SUCCESS if successful or an error value. + **/ +int +asn1_decode_simple_der (unsigned int etype, const unsigned char *der, + unsigned int _der_len, const unsigned char **str, + unsigned int *str_len) +{ + return _asn1_decode_simple_der (etype, der, _der_len, str, str_len, + DECODE_FLAG_HAVE_TAG); +} + +static int +append (uint8_t ** dst, unsigned *dst_size, const unsigned char *src, + unsigned src_size) +{ + if (src_size == 0) + return ASN1_SUCCESS; + + *dst = _asn1_realloc (*dst, *dst_size + src_size); + if (*dst == NULL) + return ASN1_MEM_ALLOC_ERROR; + memcpy (*dst + *dst_size, src, src_size); + *dst_size += src_size; + return ASN1_SUCCESS; +} + +/*- + * _asn1_decode_simple_ber: + * @etype: The type of the string to be encoded (ASN1_ETYPE_) + * @der: the encoded string + * @_der_len: the bytes of the encoded string + * @str: a pointer to the data + * @str_len: the length of the data + * @ber_len: the total length occupied by BER (may be %NULL) + * @have_tag: whether a DER tag is included + * + * Decodes a BER encoded type. The output is an allocated value + * of the data. This decodes BER STRINGS only. Other types are + * decoded as DER. + * + * Returns: %ASN1_SUCCESS if successful or an error value. + -*/ +static int +_asn1_decode_simple_ber (unsigned int etype, const unsigned char *der, + unsigned int _der_len, unsigned char **str, + unsigned int *str_len, unsigned int *ber_len, + unsigned dflags) +{ + int tag_len, len_len; + const unsigned char *p; + int der_len = _der_len; + uint8_t *total = NULL; + unsigned total_size = 0; + unsigned char class; + unsigned long tag; + unsigned char *out = NULL; + const unsigned char *cout = NULL; + unsigned out_len; + long result; + + if (ber_len) + *ber_len = 0; + + if (der == NULL || der_len == 0) + { + warn (); + return ASN1_VALUE_NOT_VALID; + } + + if (ETYPE_OK (etype) == 0) + { + warn (); + return ASN1_VALUE_NOT_VALID; + } + + /* doesn't handle constructed + definite classes */ + class = ETYPE_CLASS (etype); + if (class != ASN1_CLASS_UNIVERSAL) + { + warn (); + return ASN1_VALUE_NOT_VALID; + } + + p = der; + + if (dflags & DECODE_FLAG_HAVE_TAG) + { + result = asn1_get_tag_der (p, der_len, &class, &tag_len, &tag); + if (result != ASN1_SUCCESS) + { + warn (); + return result; + } + + if (tag != ETYPE_TAG (etype)) + { + warn (); + return ASN1_DER_ERROR; + } + + p += tag_len; + + DECR_LEN (der_len, tag_len); + + if (ber_len) + *ber_len += tag_len; + } + + /* indefinite constructed */ + if ((((dflags & DECODE_FLAG_CONSTRUCTED) || class == ASN1_CLASS_STRUCTURED) + && ETYPE_IS_STRING (etype)) && !(dflags & DECODE_FLAG_LEVEL3)) + { + if (der_len == 0) + { + warn (); + result = ASN1_DER_ERROR; + goto cleanup; + } + + if (der_len > 0 && p[0] == 0x80) /* indefinite */ + { + len_len = 1; + DECR_LEN (der_len, len_len); + p += len_len; + + if (ber_len) + *ber_len += len_len; + + /* decode the available octet strings */ + do + { + unsigned tmp_len; + unsigned flags = DECODE_FLAG_HAVE_TAG; + + if (dflags & DECODE_FLAG_LEVEL1) + flags |= DECODE_FLAG_LEVEL2; + else if (dflags & DECODE_FLAG_LEVEL2) + flags |= DECODE_FLAG_LEVEL3; + else + flags |= DECODE_FLAG_LEVEL1; + + result = + _asn1_decode_simple_ber (etype, p, der_len, &out, &out_len, + &tmp_len, flags); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + p += tmp_len; + DECR_LEN (der_len, tmp_len); + + if (ber_len) + *ber_len += tmp_len; + + DECR_LEN (der_len, 2); /* we need the EOC */ + + result = append (&total, &total_size, out, out_len); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + free (out); + out = NULL; + + if (p[0] == 0 && p[1] == 0) /* EOC */ + { + if (ber_len) + *ber_len += 2; + break; + } + + /* no EOC */ + der_len += 2; + + if (der_len == 2) + { + warn (); + result = ASN1_DER_ERROR; + goto cleanup; + } + } + while (1); + } + else /* constructed */ + { + long const_len; + + result = asn1_get_length_ber (p, der_len, &len_len); + if (result < 0) + { + warn (); + result = ASN1_DER_ERROR; + goto cleanup; + } + + DECR_LEN (der_len, len_len); + p += len_len; + + const_len = result; + + if (ber_len) + *ber_len += len_len; + + /* decode the available octet strings */ + while (const_len > 0) + { + unsigned tmp_len; + unsigned flags = DECODE_FLAG_HAVE_TAG; + + if (dflags & DECODE_FLAG_LEVEL1) + flags |= DECODE_FLAG_LEVEL2; + else if (dflags & DECODE_FLAG_LEVEL2) + flags |= DECODE_FLAG_LEVEL3; + else + flags |= DECODE_FLAG_LEVEL1; + + result = + _asn1_decode_simple_ber (etype, p, der_len, &out, &out_len, + &tmp_len, flags); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + p += tmp_len; + DECR_LEN (der_len, tmp_len); + DECR_LEN (const_len, tmp_len); + + if (ber_len) + *ber_len += tmp_len; + + result = append (&total, &total_size, out, out_len); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + free (out); + out = NULL; + } + } + } + else if (class == ETYPE_CLASS (etype)) + { + if (ber_len) + { + result = asn1_get_length_der (p, der_len, &len_len); + if (result < 0) + { + warn (); + result = ASN1_DER_ERROR; + goto cleanup; + } + *ber_len += result + len_len; + } + + /* non-string values are decoded as DER */ + result = + _asn1_decode_simple_der (etype, der, _der_len, &cout, &out_len, + dflags); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + + result = append (&total, &total_size, cout, out_len); + if (result != ASN1_SUCCESS) + { + warn (); + goto cleanup; + } + } + else + { + warn (); + result = ASN1_DER_ERROR; + goto cleanup; + } + + *str = total; + *str_len = total_size; + + return ASN1_SUCCESS; +cleanup: + free (out); + free (total); + return result; +} + +/** + * asn1_decode_simple_ber: + * @etype: The type of the string to be encoded (ASN1_ETYPE_) + * @der: the encoded string + * @_der_len: the bytes of the encoded string + * @str: a pointer to the data + * @str_len: the length of the data + * @ber_len: the total length occupied by BER (may be %NULL) + * + * Decodes a BER encoded type. The output is an allocated value + * of the data. This decodes BER STRINGS only. Other types are + * decoded as DER. + * + * Returns: %ASN1_SUCCESS if successful or an error value. + **/ +int +asn1_decode_simple_ber (unsigned int etype, const unsigned char *der, + unsigned int _der_len, unsigned char **str, + unsigned int *str_len, unsigned int *ber_len) +{ + return _asn1_decode_simple_ber (etype, der, _der_len, str, str_len, ber_len, + DECODE_FLAG_HAVE_TAG); +} diff --git a/grub-core/lib/libtasn1/lib/element.c b/grub-core/lib/libtasn1/lib/element.c new file mode 100644 index 000000000..86e64f2cf --- /dev/null +++ b/grub-core/lib/libtasn1/lib/element.c @@ -0,0 +1,1109 @@ +/* + * Copyright (C) 2000-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +/*****************************************************/ +/* File: element.c */ +/* Description: Functions with the read and write */ +/* functions. */ +/*****************************************************/ + + +#include <int.h> +#include "parser_aux.h" +#include <gstr.h> +#include "structure.h" +#include "c-ctype.h" +#include "element.h" + +void +_asn1_hierarchical_name (asn1_node_const node, char *name, int name_size) +{ + asn1_node_const p; + char tmp_name[64]; + + p = node; + + name[0] = 0; + + while (p != NULL) + { + if (p->name[0] != 0) + { + _asn1_str_cpy (tmp_name, sizeof (tmp_name), name), + _asn1_str_cpy (name, name_size, p->name); + _asn1_str_cat (name, name_size, "."); + _asn1_str_cat (name, name_size, tmp_name); + } + p = _asn1_find_up (p); + } + + if (name[0] == 0) + _asn1_str_cpy (name, name_size, "ROOT"); +} + + +/******************************************************************/ +/* Function : _asn1_convert_integer */ +/* Description: converts an integer from a null terminated string */ +/* to der decoding. The convertion from a null */ +/* terminated string to an integer is made with */ +/* the 'strtol' function. */ +/* Parameters: */ +/* value: null terminated string to convert. */ +/* value_out: convertion result (memory must be already */ +/* allocated). */ +/* value_out_size: number of bytes of value_out. */ +/* len: number of significant byte of value_out. */ +/* Return: ASN1_MEM_ERROR or ASN1_SUCCESS */ +/******************************************************************/ +int +_asn1_convert_integer (const unsigned char *value, unsigned char *value_out, + int value_out_size, int *len) +{ + char negative; + unsigned char val[SIZEOF_UNSIGNED_LONG_INT]; + long valtmp; + int k, k2; + + valtmp = _asn1_strtol (value, NULL, 10); + + for (k = 0; k < SIZEOF_UNSIGNED_LONG_INT; k++) + { + val[SIZEOF_UNSIGNED_LONG_INT - k - 1] = (valtmp >> (8 * k)) & 0xFF; + } + + if (val[0] & 0x80) + negative = 1; + else + negative = 0; + + for (k = 0; k < SIZEOF_UNSIGNED_LONG_INT - 1; k++) + { + if (negative && (val[k] != 0xFF)) + break; + else if (!negative && val[k]) + break; + } + + if ((negative && !(val[k] & 0x80)) || (!negative && (val[k] & 0x80))) + k--; + + *len = SIZEOF_UNSIGNED_LONG_INT - k; + + if (SIZEOF_UNSIGNED_LONG_INT - k > value_out_size) + /* VALUE_OUT is too short to contain the value conversion */ + return ASN1_MEM_ERROR; + + if (value_out != NULL) + { + for (k2 = k; k2 < SIZEOF_UNSIGNED_LONG_INT; k2++) + value_out[k2 - k] = val[k2]; + } + +#if 0 + printf ("_asn1_convert_integer: valueIn=%s, lenOut=%d", value, *len); + for (k = 0; k < SIZEOF_UNSIGNED_LONG_INT; k++) + printf (", vOut[%d]=%d", k, value_out[k]); + printf ("\n"); +#endif + + return ASN1_SUCCESS; +} + +/* Appends a new element into the sequence (or set) defined by this + * node. The new element will have a name of '?number', where number + * is a monotonically increased serial number. + * + * The last element in the list may be provided in @pcache, to avoid + * traversing the list, an expensive operation in long lists. + * + * On success it returns in @pcache the added element (which is the + * tail in the list of added elements). + */ +int +_asn1_append_sequence_set (asn1_node node, struct node_tail_cache_st *pcache) +{ + asn1_node p, p2; + char temp[LTOSTR_MAX_SIZE + 1]; + long n; + + if (!node || !(node->down)) + return ASN1_GENERIC_ERROR; + + p = node->down; + while ((type_field (p->type) == ASN1_ETYPE_TAG) + || (type_field (p->type) == ASN1_ETYPE_SIZE)) + p = p->right; + + p2 = _asn1_copy_structure3 (p); + if (p2 == NULL) + return ASN1_GENERIC_ERROR; + + if (pcache == NULL || pcache->tail == NULL || pcache->head != node) + { + while (p->right) + { + p = p->right; + } + } + else + { + p = pcache->tail; + } + + _asn1_set_right (p, p2); + if (pcache) + { + pcache->head = node; + pcache->tail = p2; + } + + if (p->name[0] == 0) + _asn1_str_cpy (temp, sizeof (temp), "?1"); + else + { + n = strtol (p->name + 1, NULL, 0); + n++; + temp[0] = '?'; + _asn1_ltostr (n, temp + 1); + } + _asn1_set_name (p2, temp); + /* p2->type |= CONST_OPTION; */ + + return ASN1_SUCCESS; +} + + +/** + * asn1_write_value: + * @node_root: pointer to a structure + * @name: the name of the element inside the structure that you want to set. + * @ivalue: vector used to specify the value to set. If len is >0, + * VALUE must be a two's complement form integer. if len=0 *VALUE + * must be a null terminated string with an integer value. + * @len: number of bytes of *value to use to set the value: + * value[0]..value[len-1] or 0 if value is a null terminated string + * + * Set the value of one element inside a structure. + * + * If an element is OPTIONAL and you want to delete it, you must use + * the value=NULL and len=0. Using "pkix.asn": + * + * result=asn1_write_value(cert, "tbsCertificate.issuerUniqueID", + * NULL, 0); + * + * Description for each type: + * + * INTEGER: VALUE must contain a two's complement form integer. + * + * value[0]=0xFF , len=1 -> integer=-1. + * value[0]=0xFF value[1]=0xFF , len=2 -> integer=-1. + * value[0]=0x01 , len=1 -> integer= 1. + * value[0]=0x00 value[1]=0x01 , len=2 -> integer= 1. + * value="123" , len=0 -> integer= 123. + * + * ENUMERATED: As INTEGER (but only with not negative numbers). + * + * BOOLEAN: VALUE must be the null terminated string "TRUE" or + * "FALSE" and LEN != 0. + * + * value="TRUE" , len=1 -> boolean=TRUE. + * value="FALSE" , len=1 -> boolean=FALSE. + * + * OBJECT IDENTIFIER: VALUE must be a null terminated string with + * each number separated by a dot (e.g. "1.2.3.543.1"). LEN != 0. + * + * value="1 2 840 10040 4 3" , len=1 -> OID=dsa-with-sha. + * + * UTCTime: VALUE must be a null terminated string in one of these + * formats: "YYMMDDhhmmssZ", "YYMMDDhhmmssZ", + * "YYMMDDhhmmss+hh'mm'", "YYMMDDhhmmss-hh'mm'", + * "YYMMDDhhmm+hh'mm'", or "YYMMDDhhmm-hh'mm'". LEN != 0. + * + * value="9801011200Z" , len=1 -> time=Jannuary 1st, 1998 + * at 12h 00m Greenwich Mean Time + * + * GeneralizedTime: VALUE must be in one of this format: + * "YYYYMMDDhhmmss.sZ", "YYYYMMDDhhmmss.sZ", + * "YYYYMMDDhhmmss.s+hh'mm'", "YYYYMMDDhhmmss.s-hh'mm'", + * "YYYYMMDDhhmm+hh'mm'", or "YYYYMMDDhhmm-hh'mm'" where ss.s + * indicates the seconds with any precision like "10.1" or "01.02". + * LEN != 0 + * + * value="2001010112001.12-0700" , len=1 -> time=Jannuary + * 1st, 2001 at 12h 00m 01.12s Pacific Daylight Time + * + * OCTET STRING: VALUE contains the octet string and LEN is the + * number of octets. + * + * value="$\backslash$x01$\backslash$x02$\backslash$x03" , + * len=3 -> three bytes octet string + * + * GeneralString: VALUE contains the generalstring and LEN is the + * number of octets. + * + * value="$\backslash$x01$\backslash$x02$\backslash$x03" , + * len=3 -> three bytes generalstring + * + * BIT STRING: VALUE contains the bit string organized by bytes and + * LEN is the number of bits. + * + * value="$\backslash$xCF" , len=6 -> bit string="110011" (six + * bits) + * + * CHOICE: if NAME indicates a choice type, VALUE must specify one of + * the alternatives with a null terminated string. LEN != 0. Using + * "pkix.asn"\: + * + * result=asn1_write_value(cert, + * "certificate1.tbsCertificate.subject", "rdnSequence", + * 1); + * + * ANY: VALUE indicates the der encoding of a structure. LEN != 0. + * + * SEQUENCE OF: VALUE must be the null terminated string "NEW" and + * LEN != 0. With this instruction another element is appended in + * the sequence. The name of this element will be "?1" if it's the + * first one, "?2" for the second and so on. + * + * Using "pkix.asn"\: + * + * result=asn1_write_value(cert, + * "certificate1.tbsCertificate.subject.rdnSequence", "NEW", 1); + * + * SET OF: the same as SEQUENCE OF. Using "pkix.asn": + * + * result=asn1_write_value(cert, + * "tbsCertificate.subject.rdnSequence.?LAST", "NEW", 1); + * + * Returns: %ASN1_SUCCESS if the value was set, + * %ASN1_ELEMENT_NOT_FOUND if @name is not a valid element, and + * %ASN1_VALUE_NOT_VALID if @ivalue has a wrong format. + **/ +int +asn1_write_value (asn1_node node_root, const char *name, + const void *ivalue, int len) +{ + asn1_node node, p, p2; + unsigned char *temp, *value_temp = NULL, *default_temp = NULL; + int len2, k, k2, negative; + size_t i; + const unsigned char *value = ivalue; + unsigned int type; + + node = asn1_find_node (node_root, name); + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + if ((node->type & CONST_OPTION) && (value == NULL) && (len == 0)) + { + asn1_delete_structure (&node); + return ASN1_SUCCESS; + } + + type = type_field (node->type); + + if ((type == ASN1_ETYPE_SEQUENCE_OF || type == ASN1_ETYPE_SET_OF) + && (value == NULL) && (len == 0)) + { + p = node->down; + while ((type_field (p->type) == ASN1_ETYPE_TAG) + || (type_field (p->type) == ASN1_ETYPE_SIZE)) + p = p->right; + + while (p->right) + asn1_delete_structure (&p->right); + + return ASN1_SUCCESS; + } + + /* Don't allow element deletion for other types */ + if (value == NULL) + { + return ASN1_VALUE_NOT_VALID; + } + + switch (type) + { + case ASN1_ETYPE_BOOLEAN: + if (!_asn1_strcmp (value, "TRUE")) + { + if (node->type & CONST_DEFAULT) + { + p = node->down; + while (type_field (p->type) != ASN1_ETYPE_DEFAULT) + p = p->right; + if (p->type & CONST_TRUE) + _asn1_set_value (node, NULL, 0); + else + _asn1_set_value (node, "T", 1); + } + else + _asn1_set_value (node, "T", 1); + } + else if (!_asn1_strcmp (value, "FALSE")) + { + if (node->type & CONST_DEFAULT) + { + p = node->down; + while (type_field (p->type) != ASN1_ETYPE_DEFAULT) + p = p->right; + if (p->type & CONST_FALSE) + _asn1_set_value (node, NULL, 0); + else + _asn1_set_value (node, "F", 1); + } + else + _asn1_set_value (node, "F", 1); + } + else + return ASN1_VALUE_NOT_VALID; + break; + case ASN1_ETYPE_INTEGER: + case ASN1_ETYPE_ENUMERATED: + if (len == 0) + { + if ((c_isdigit (value[0])) || (value[0] == '-')) + { + value_temp = malloc (SIZEOF_UNSIGNED_LONG_INT); + if (value_temp == NULL) + return ASN1_MEM_ALLOC_ERROR; + + _asn1_convert_integer (value, value_temp, + SIZEOF_UNSIGNED_LONG_INT, &len); + } + else + { /* is an identifier like v1 */ + if (!(node->type & CONST_LIST)) + return ASN1_VALUE_NOT_VALID; + p = node->down; + while (p) + { + if (type_field (p->type) == ASN1_ETYPE_CONSTANT) + { + if (!_asn1_strcmp (p->name, value)) + { + value_temp = malloc (SIZEOF_UNSIGNED_LONG_INT); + if (value_temp == NULL) + return ASN1_MEM_ALLOC_ERROR; + + _asn1_convert_integer (p->value, + value_temp, + SIZEOF_UNSIGNED_LONG_INT, + &len); + break; + } + } + p = p->right; + } + if (p == NULL) + return ASN1_VALUE_NOT_VALID; + } + } + else + { /* len != 0 */ + value_temp = malloc (len); + if (value_temp == NULL) + return ASN1_MEM_ALLOC_ERROR; + memcpy (value_temp, value, len); + } + + if (value_temp[0] & 0x80) + negative = 1; + else + negative = 0; + + if (negative && (type_field (node->type) == ASN1_ETYPE_ENUMERATED)) + { + free (value_temp); + return ASN1_VALUE_NOT_VALID; + } + + for (k = 0; k < len - 1; k++) + if (negative && (value_temp[k] != 0xFF)) + break; + else if (!negative && value_temp[k]) + break; + + if ((negative && !(value_temp[k] & 0x80)) || + (!negative && (value_temp[k] & 0x80))) + k--; + + _asn1_set_value_lv (node, value_temp + k, len - k); + + if (node->type & CONST_DEFAULT) + { + p = node->down; + while (type_field (p->type) != ASN1_ETYPE_DEFAULT) + p = p->right; + if ((c_isdigit (p->value[0])) || (p->value[0] == '-')) + { + default_temp = malloc (SIZEOF_UNSIGNED_LONG_INT); + if (default_temp == NULL) + { + free (value_temp); + return ASN1_MEM_ALLOC_ERROR; + } + + _asn1_convert_integer (p->value, default_temp, + SIZEOF_UNSIGNED_LONG_INT, &len2); + } + else + { /* is an identifier like v1 */ + if (!(node->type & CONST_LIST)) + { + free (value_temp); + return ASN1_VALUE_NOT_VALID; + } + p2 = node->down; + while (p2) + { + if (type_field (p2->type) == ASN1_ETYPE_CONSTANT) + { + if (!_asn1_strcmp (p2->name, p->value)) + { + default_temp = malloc (SIZEOF_UNSIGNED_LONG_INT); + if (default_temp == NULL) + { + free (value_temp); + return ASN1_MEM_ALLOC_ERROR; + } + + _asn1_convert_integer (p2->value, + default_temp, + SIZEOF_UNSIGNED_LONG_INT, + &len2); + break; + } + } + p2 = p2->right; + } + if (p2 == NULL) + { + free (value_temp); + return ASN1_VALUE_NOT_VALID; + } + } + + + if ((len - k) == len2) + { + for (k2 = 0; k2 < len2; k2++) + if (value_temp[k + k2] != default_temp[k2]) + { + break; + } + if (k2 == len2) + _asn1_set_value (node, NULL, 0); + } + free (default_temp); + } + free (value_temp); + break; + case ASN1_ETYPE_OBJECT_ID: + for (i = 0; i < _asn1_strlen (value); i++) + if ((!c_isdigit (value[i])) && (value[i] != '.') && (value[i] != '+')) + return ASN1_VALUE_NOT_VALID; + if (node->type & CONST_DEFAULT) + { + p = node->down; + while (type_field (p->type) != ASN1_ETYPE_DEFAULT) + p = p->right; + if (!_asn1_strcmp (value, p->value)) + { + _asn1_set_value (node, NULL, 0); + break; + } + } + _asn1_set_value (node, value, _asn1_strlen (value) + 1); + break; + case ASN1_ETYPE_UTC_TIME: + { + len = _asn1_strlen (value); + if (len < 11) + return ASN1_VALUE_NOT_VALID; + for (k = 0; k < 10; k++) + if (!c_isdigit (value[k])) + return ASN1_VALUE_NOT_VALID; + switch (len) + { + case 11: + if (value[10] != 'Z') + return ASN1_VALUE_NOT_VALID; + break; + case 13: + if ((!c_isdigit (value[10])) || (!c_isdigit (value[11])) || + (value[12] != 'Z')) + return ASN1_VALUE_NOT_VALID; + break; + case 15: + if ((value[10] != '+') && (value[10] != '-')) + return ASN1_VALUE_NOT_VALID; + for (k = 11; k < 15; k++) + if (!c_isdigit (value[k])) + return ASN1_VALUE_NOT_VALID; + break; + case 17: + if ((!c_isdigit (value[10])) || (!c_isdigit (value[11]))) + return ASN1_VALUE_NOT_VALID; + if ((value[12] != '+') && (value[12] != '-')) + return ASN1_VALUE_NOT_VALID; + for (k = 13; k < 17; k++) + if (!c_isdigit (value[k])) + return ASN1_VALUE_NOT_VALID; + break; + default: + return ASN1_VALUE_NOT_FOUND; + } + _asn1_set_value (node, value, len); + } + break; + case ASN1_ETYPE_GENERALIZED_TIME: + len = _asn1_strlen (value); + _asn1_set_value (node, value, len); + break; + case ASN1_ETYPE_OCTET_STRING: + case ASN1_ETYPE_GENERALSTRING: + case ASN1_ETYPE_NUMERIC_STRING: + case ASN1_ETYPE_IA5_STRING: + case ASN1_ETYPE_TELETEX_STRING: + case ASN1_ETYPE_PRINTABLE_STRING: + case ASN1_ETYPE_UNIVERSAL_STRING: + case ASN1_ETYPE_BMP_STRING: + case ASN1_ETYPE_UTF8_STRING: + case ASN1_ETYPE_VISIBLE_STRING: + if (len == 0) + len = _asn1_strlen (value); + _asn1_set_value_lv (node, value, len); + break; + case ASN1_ETYPE_BIT_STRING: + if (len == 0) + len = _asn1_strlen (value); + asn1_length_der ((len >> 3) + 2, NULL, &len2); + temp = malloc ((len >> 3) + 2 + len2); + if (temp == NULL) + return ASN1_MEM_ALLOC_ERROR; + + asn1_bit_der (value, len, temp, &len2); + _asn1_set_value_m (node, temp, len2); + temp = NULL; + break; + case ASN1_ETYPE_CHOICE: + p = node->down; + while (p) + { + if (!_asn1_strcmp (p->name, value)) + { + p2 = node->down; + while (p2) + { + if (p2 != p) + { + asn1_delete_structure (&p2); + p2 = node->down; + } + else + p2 = p2->right; + } + break; + } + p = p->right; + } + if (!p) + return ASN1_ELEMENT_NOT_FOUND; + break; + case ASN1_ETYPE_ANY: + _asn1_set_value_lv (node, value, len); + break; + case ASN1_ETYPE_SEQUENCE_OF: + case ASN1_ETYPE_SET_OF: + if (_asn1_strcmp (value, "NEW")) + return ASN1_VALUE_NOT_VALID; + _asn1_append_sequence_set (node, NULL); + break; + default: + return ASN1_ELEMENT_NOT_FOUND; + break; + } + + return ASN1_SUCCESS; +} + + +#define PUT_VALUE( ptr, ptr_size, data, data_size) \ + *len = data_size; \ + if (ptr_size < data_size) { \ + return ASN1_MEM_ERROR; \ + } else { \ + if (ptr && data_size > 0) \ + memcpy (ptr, data, data_size); \ + } + +#define PUT_STR_VALUE( ptr, ptr_size, data) \ + *len = _asn1_strlen (data) + 1; \ + if (ptr_size < *len) { \ + return ASN1_MEM_ERROR; \ + } else { \ + /* this strcpy is checked */ \ + if (ptr) { \ + _asn1_strcpy (ptr, data); \ + } \ + } + +#define PUT_AS_STR_VALUE( ptr, ptr_size, data, data_size) \ + *len = data_size + 1; \ + if (ptr_size < *len) { \ + return ASN1_MEM_ERROR; \ + } else { \ + /* this strcpy is checked */ \ + if (ptr) { \ + if (data_size > 0) \ + memcpy (ptr, data, data_size); \ + ptr[data_size] = 0; \ + } \ + } + +#define ADD_STR_VALUE( ptr, ptr_size, data) \ + *len += _asn1_strlen(data); \ + if (ptr_size < (int) *len) { \ + (*len)++; \ + return ASN1_MEM_ERROR; \ + } else { \ + /* this strcat is checked */ \ + if (ptr) _asn1_strcat (ptr, data); \ + } + +/** + * asn1_read_value: + * @root: pointer to a structure. + * @name: the name of the element inside a structure that you want to read. + * @ivalue: vector that will contain the element's content, must be a + * pointer to memory cells already allocated (may be %NULL). + * @len: number of bytes of *value: value[0]..value[len-1]. Initialy + * holds the sizeof value. + * + * Returns the value of one element inside a structure. + * If an element is OPTIONAL and this returns + * %ASN1_ELEMENT_NOT_FOUND, it means that this element wasn't present + * in the der encoding that created the structure. The first element + * of a SEQUENCE_OF or SET_OF is named "?1". The second one "?2" and + * so on. If the @root provided is a node to specific sequence element, + * then the keyword "?CURRENT" is also acceptable and indicates the + * current sequence element of this node. + * + * Note that there can be valid values with length zero. In these case + * this function will succeed and @len will be zero. + * + * INTEGER: VALUE will contain a two's complement form integer. + * + * integer=-1 -> value[0]=0xFF , len=1. + * integer=1 -> value[0]=0x01 , len=1. + * + * ENUMERATED: As INTEGER (but only with not negative numbers). + * + * BOOLEAN: VALUE will be the null terminated string "TRUE" or + * "FALSE" and LEN=5 or LEN=6. + * + * OBJECT IDENTIFIER: VALUE will be a null terminated string with + * each number separated by a dot (i.e. "1.2.3.543.1"). + * + * LEN = strlen(VALUE)+1 + * + * UTCTime: VALUE will be a null terminated string in one of these + * formats: "YYMMDDhhmmss+hh'mm'" or "YYMMDDhhmmss-hh'mm'". + * LEN=strlen(VALUE)+1. + * + * GeneralizedTime: VALUE will be a null terminated string in the + * same format used to set the value. + * + * OCTET STRING: VALUE will contain the octet string and LEN will be + * the number of octets. + * + * GeneralString: VALUE will contain the generalstring and LEN will + * be the number of octets. + * + * BIT STRING: VALUE will contain the bit string organized by bytes + * and LEN will be the number of bits. + * + * CHOICE: If NAME indicates a choice type, VALUE will specify the + * alternative selected. + * + * ANY: If NAME indicates an any type, VALUE will indicate the DER + * encoding of the structure actually used. + * + * Returns: %ASN1_SUCCESS if value is returned, + * %ASN1_ELEMENT_NOT_FOUND if @name is not a valid element, + * %ASN1_VALUE_NOT_FOUND if there isn't any value for the element + * selected, and %ASN1_MEM_ERROR if The value vector isn't big enough + * to store the result, and in this case @len will contain the number of + * bytes needed. On the occasion that the stored data are of zero-length + * this function may return %ASN1_SUCCESS even if the provided @len is zero. + **/ +int +asn1_read_value (asn1_node_const root, const char *name, void *ivalue, + int *len) +{ + return asn1_read_value_type (root, name, ivalue, len, NULL); +} + +/** + * asn1_read_value_type: + * @root: pointer to a structure. + * @name: the name of the element inside a structure that you want to read. + * @ivalue: vector that will contain the element's content, must be a + * pointer to memory cells already allocated (may be %NULL). + * @len: number of bytes of *value: value[0]..value[len-1]. Initialy + * holds the sizeof value. + * @etype: The type of the value read (ASN1_ETYPE) + * + * Returns the type and value of one element inside a structure. + * If an element is OPTIONAL and this returns + * %ASN1_ELEMENT_NOT_FOUND, it means that this element wasn't present + * in the der encoding that created the structure. The first element + * of a SEQUENCE_OF or SET_OF is named "?1". The second one "?2" and + * so on. If the @root provided is a node to specific sequence element, + * then the keyword "?CURRENT" is also acceptable and indicates the + * current sequence element of this node. + * + * Note that there can be valid values with length zero. In these case + * this function will succeed and @len will be zero. + * + * + * INTEGER: VALUE will contain a two's complement form integer. + * + * integer=-1 -> value[0]=0xFF , len=1. + * integer=1 -> value[0]=0x01 , len=1. + * + * ENUMERATED: As INTEGER (but only with not negative numbers). + * + * BOOLEAN: VALUE will be the null terminated string "TRUE" or + * "FALSE" and LEN=5 or LEN=6. + * + * OBJECT IDENTIFIER: VALUE will be a null terminated string with + * each number separated by a dot (i.e. "1.2.3.543.1"). + * + * LEN = strlen(VALUE)+1 + * + * UTCTime: VALUE will be a null terminated string in one of these + * formats: "YYMMDDhhmmss+hh'mm'" or "YYMMDDhhmmss-hh'mm'". + * LEN=strlen(VALUE)+1. + * + * GeneralizedTime: VALUE will be a null terminated string in the + * same format used to set the value. + * + * OCTET STRING: VALUE will contain the octet string and LEN will be + * the number of octets. + * + * GeneralString: VALUE will contain the generalstring and LEN will + * be the number of octets. + * + * BIT STRING: VALUE will contain the bit string organized by bytes + * and LEN will be the number of bits. + * + * CHOICE: If NAME indicates a choice type, VALUE will specify the + * alternative selected. + * + * ANY: If NAME indicates an any type, VALUE will indicate the DER + * encoding of the structure actually used. + * + * Returns: %ASN1_SUCCESS if value is returned, + * %ASN1_ELEMENT_NOT_FOUND if @name is not a valid element, + * %ASN1_VALUE_NOT_FOUND if there isn't any value for the element + * selected, and %ASN1_MEM_ERROR if The value vector isn't big enough + * to store the result, and in this case @len will contain the number of + * bytes needed. On the occasion that the stored data are of zero-length + * this function may return %ASN1_SUCCESS even if the provided @len is zero. + **/ +int +asn1_read_value_type (asn1_node_const root, const char *name, void *ivalue, + int *len, unsigned int *etype) +{ + asn1_node_const node, p, p2; + int len2, len3, result; + int value_size = *len; + unsigned char *value = ivalue; + unsigned type; + + node = asn1_find_node (root, name); + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + type = type_field (node->type); + + if ((type != ASN1_ETYPE_NULL) && + (type != ASN1_ETYPE_CHOICE) && + !(node->type & CONST_DEFAULT) && !(node->type & CONST_ASSIGN) && + (node->value == NULL)) + return ASN1_VALUE_NOT_FOUND; + + if (etype) + *etype = type; + switch (type) + { + case ASN1_ETYPE_NULL: + PUT_STR_VALUE (value, value_size, "NULL"); + break; + case ASN1_ETYPE_BOOLEAN: + if ((node->type & CONST_DEFAULT) && (node->value == NULL)) + { + p = node->down; + while (type_field (p->type) != ASN1_ETYPE_DEFAULT) + p = p->right; + if (p->type & CONST_TRUE) + { + PUT_STR_VALUE (value, value_size, "TRUE"); + } + else + { + PUT_STR_VALUE (value, value_size, "FALSE"); + } + } + else if (node->value[0] == 'T') + { + PUT_STR_VALUE (value, value_size, "TRUE"); + } + else + { + PUT_STR_VALUE (value, value_size, "FALSE"); + } + break; + case ASN1_ETYPE_INTEGER: + case ASN1_ETYPE_ENUMERATED: + if ((node->type & CONST_DEFAULT) && (node->value == NULL)) + { + p = node->down; + while (type_field (p->type) != ASN1_ETYPE_DEFAULT) + p = p->right; + if ((c_isdigit (p->value[0])) || (p->value[0] == '-') + || (p->value[0] == '+')) + { + result = _asn1_convert_integer + (p->value, value, value_size, len); + if (result != ASN1_SUCCESS) + return result; + } + else + { /* is an identifier like v1 */ + p2 = node->down; + while (p2) + { + if (type_field (p2->type) == ASN1_ETYPE_CONSTANT) + { + if (!_asn1_strcmp (p2->name, p->value)) + { + result = _asn1_convert_integer + (p2->value, value, value_size, len); + if (result != ASN1_SUCCESS) + return result; + break; + } + } + p2 = p2->right; + } + } + } + else + { + len2 = -1; + result = asn1_get_octet_der + (node->value, node->value_len, &len2, value, value_size, len); + if (result != ASN1_SUCCESS) + return result; + } + break; + case ASN1_ETYPE_OBJECT_ID: + if (node->type & CONST_ASSIGN) + { + *len = 0; + if (value) + value[0] = 0; + p = node->down; + while (p) + { + if (type_field (p->type) == ASN1_ETYPE_CONSTANT) + { + ADD_STR_VALUE (value, value_size, p->value); + if (p->right) + { + ADD_STR_VALUE (value, value_size, "."); + } + } + p = p->right; + } + (*len)++; + } + else if ((node->type & CONST_DEFAULT) && (node->value == NULL)) + { + p = node->down; + while (type_field (p->type) != ASN1_ETYPE_DEFAULT) + p = p->right; + PUT_STR_VALUE (value, value_size, p->value); + } + else + { + PUT_STR_VALUE (value, value_size, node->value); + } + break; + case ASN1_ETYPE_GENERALIZED_TIME: + case ASN1_ETYPE_UTC_TIME: + PUT_AS_STR_VALUE (value, value_size, node->value, node->value_len); + break; + case ASN1_ETYPE_OCTET_STRING: + case ASN1_ETYPE_GENERALSTRING: + case ASN1_ETYPE_NUMERIC_STRING: + case ASN1_ETYPE_IA5_STRING: + case ASN1_ETYPE_TELETEX_STRING: + case ASN1_ETYPE_PRINTABLE_STRING: + case ASN1_ETYPE_UNIVERSAL_STRING: + case ASN1_ETYPE_BMP_STRING: + case ASN1_ETYPE_UTF8_STRING: + case ASN1_ETYPE_VISIBLE_STRING: + len2 = -1; + result = asn1_get_octet_der + (node->value, node->value_len, &len2, value, value_size, len); + if (result != ASN1_SUCCESS) + return result; + break; + case ASN1_ETYPE_BIT_STRING: + len2 = -1; + result = asn1_get_bit_der + (node->value, node->value_len, &len2, value, value_size, len); + if (result != ASN1_SUCCESS) + return result; + break; + case ASN1_ETYPE_CHOICE: + PUT_STR_VALUE (value, value_size, node->down->name); + break; + case ASN1_ETYPE_ANY: + len3 = -1; + len2 = asn1_get_length_der (node->value, node->value_len, &len3); + if (len2 < 0) + return ASN1_DER_ERROR; + PUT_VALUE (value, value_size, node->value + len3, len2); + break; + default: + return ASN1_ELEMENT_NOT_FOUND; + break; + } + return ASN1_SUCCESS; +} + + +/** + * asn1_read_tag: + * @root: pointer to a structure + * @name: the name of the element inside a structure. + * @tagValue: variable that will contain the TAG value. + * @classValue: variable that will specify the TAG type. + * + * Returns the TAG and the CLASS of one element inside a structure. + * CLASS can have one of these constants: %ASN1_CLASS_APPLICATION, + * %ASN1_CLASS_UNIVERSAL, %ASN1_CLASS_PRIVATE or + * %ASN1_CLASS_CONTEXT_SPECIFIC. + * + * Returns: %ASN1_SUCCESS if successful, %ASN1_ELEMENT_NOT_FOUND if + * @name is not a valid element. + **/ +int +asn1_read_tag (asn1_node_const root, const char *name, int *tagValue, + int *classValue) +{ + asn1_node node, p, pTag; + + node = asn1_find_node (root, name); + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = node->down; + + /* pTag will points to the IMPLICIT TAG */ + pTag = NULL; + if (node->type & CONST_TAG) + { + while (p) + { + if (type_field (p->type) == ASN1_ETYPE_TAG) + { + if ((p->type & CONST_IMPLICIT) && (pTag == NULL)) + pTag = p; + else if (p->type & CONST_EXPLICIT) + pTag = NULL; + } + p = p->right; + } + } + + if (pTag) + { + *tagValue = _asn1_strtoul (pTag->value, NULL, 10); + + if (pTag->type & CONST_APPLICATION) + *classValue = ASN1_CLASS_APPLICATION; + else if (pTag->type & CONST_UNIVERSAL) + *classValue = ASN1_CLASS_UNIVERSAL; + else if (pTag->type & CONST_PRIVATE) + *classValue = ASN1_CLASS_PRIVATE; + else + *classValue = ASN1_CLASS_CONTEXT_SPECIFIC; + } + else + { + unsigned type = type_field (node->type); + *classValue = ASN1_CLASS_UNIVERSAL; + + switch (type) + { + CASE_HANDLED_ETYPES: + *tagValue = _asn1_tags[type].tag; + break; + case ASN1_ETYPE_TAG: + case ASN1_ETYPE_CHOICE: + case ASN1_ETYPE_ANY: + *tagValue = -1; + break; + default: + break; + } + } + + return ASN1_SUCCESS; +} + +/** + * asn1_read_node_value: + * @node: pointer to a node. + * @data: a point to a asn1_data_node_st + * + * Returns the value a data node inside a asn1_node structure. + * The data returned should be handled as constant values. + * + * Returns: %ASN1_SUCCESS if the node exists. + **/ +int +asn1_read_node_value (asn1_node_const node, asn1_data_node_st * data) +{ + data->name = node->name; + data->value = node->value; + data->value_len = node->value_len; + data->type = type_field (node->type); + + return ASN1_SUCCESS; +} diff --git a/grub-core/lib/libtasn1/lib/element.h b/grub-core/lib/libtasn1/lib/element.h new file mode 100644 index 000000000..4c9a901d1 --- /dev/null +++ b/grub-core/lib/libtasn1/lib/element.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) 2000-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +#ifndef _ELEMENT_H +# define _ELEMENT_H + + +struct node_tail_cache_st +{ + asn1_node head; /* the first element of the sequence */ + asn1_node tail; +}; + +int _asn1_append_sequence_set (asn1_node node, + struct node_tail_cache_st *pcached); + +int _asn1_convert_integer (const unsigned char *value, + unsigned char *value_out, + int value_out_size, int *len); + +void _asn1_hierarchical_name (asn1_node_const node, char *name, + int name_size); + +#endif diff --git a/grub-core/lib/libtasn1/lib/errors.c b/grub-core/lib/libtasn1/lib/errors.c new file mode 100644 index 000000000..4dadbd96d --- /dev/null +++ b/grub-core/lib/libtasn1/lib/errors.c @@ -0,0 +1,100 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +#include <int.h> +#ifdef STDC_HEADERS +# include <stdarg.h> +#endif + +#define LIBTASN1_ERROR_ENTRY(name) { #name, name } + +struct libtasn1_error_entry +{ + const char *name; + int number; +}; +typedef struct libtasn1_error_entry libtasn1_error_entry; + +static const libtasn1_error_entry error_algorithms[] = { + LIBTASN1_ERROR_ENTRY (ASN1_SUCCESS), + LIBTASN1_ERROR_ENTRY (ASN1_FILE_NOT_FOUND), + LIBTASN1_ERROR_ENTRY (ASN1_ELEMENT_NOT_FOUND), + LIBTASN1_ERROR_ENTRY (ASN1_IDENTIFIER_NOT_FOUND), + LIBTASN1_ERROR_ENTRY (ASN1_DER_ERROR), + LIBTASN1_ERROR_ENTRY (ASN1_VALUE_NOT_FOUND), + LIBTASN1_ERROR_ENTRY (ASN1_GENERIC_ERROR), + LIBTASN1_ERROR_ENTRY (ASN1_VALUE_NOT_VALID), + LIBTASN1_ERROR_ENTRY (ASN1_TAG_ERROR), + LIBTASN1_ERROR_ENTRY (ASN1_TAG_IMPLICIT), + LIBTASN1_ERROR_ENTRY (ASN1_ERROR_TYPE_ANY), + LIBTASN1_ERROR_ENTRY (ASN1_SYNTAX_ERROR), + LIBTASN1_ERROR_ENTRY (ASN1_MEM_ERROR), + LIBTASN1_ERROR_ENTRY (ASN1_MEM_ALLOC_ERROR), + LIBTASN1_ERROR_ENTRY (ASN1_DER_OVERFLOW), + LIBTASN1_ERROR_ENTRY (ASN1_NAME_TOO_LONG), + LIBTASN1_ERROR_ENTRY (ASN1_ARRAY_ERROR), + LIBTASN1_ERROR_ENTRY (ASN1_ELEMENT_NOT_EMPTY), + LIBTASN1_ERROR_ENTRY (ASN1_TIME_ENCODING_ERROR), + LIBTASN1_ERROR_ENTRY (ASN1_RECURSION), + {0, 0} +}; + +/** + * asn1_perror: + * @error: is an error returned by a libtasn1 function. + * + * Prints a string to stderr with a description of an error. This + * function is like perror(). The only difference is that it accepts + * an error returned by a libtasn1 function. + * + * Since: 1.6 + **/ +void +asn1_perror (int error) +{ + const char *str = asn1_strerror (error); + fprintf (stderr, "LIBTASN1 ERROR: %s\n", str ? str : "(null)"); +} + +/** + * asn1_strerror: + * @error: is an error returned by a libtasn1 function. + * + * Returns a string with a description of an error. This function is + * similar to strerror. The only difference is that it accepts an + * error (number) returned by a libtasn1 function. + * + * Returns: Pointer to static zero-terminated string describing error + * code. + * + * Since: 1.6 + **/ +const char * +asn1_strerror (int error) +{ + const libtasn1_error_entry *p; + + for (p = error_algorithms; p->name != NULL; p++) + if (p->number == error) + return p->name + sizeof ("ASN1_") - 1; + + return NULL; +} diff --git a/grub-core/lib/libtasn1/lib/gstr.c b/grub-core/lib/libtasn1/lib/gstr.c new file mode 100644 index 000000000..1475ed51b --- /dev/null +++ b/grub-core/lib/libtasn1/lib/gstr.c @@ -0,0 +1,74 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +#include <int.h> +#include "gstr.h" + +/* These function are like strcat, strcpy. They only + * do bounds checking (they shouldn't cause buffer overruns), + * and they always produce null terminated strings. + * + * They should be used only with null terminated strings. + */ +void +_asn1_str_cat (char *dest, size_t dest_tot_size, const char *src) +{ + size_t str_size = strlen (src); + size_t dest_size = strlen (dest); + + if (dest_tot_size - dest_size > str_size) + { + strcat (dest, src); + } + else + { + if (dest_tot_size > dest_size) + { + strncat (dest, src, (dest_tot_size - dest_size) - 1); + dest[dest_tot_size - 1] = 0; + } + } +} + +/* Returns the bytes copied (not including the null terminator) */ +unsigned int +_asn1_str_cpy (char *dest, size_t dest_tot_size, const char *src) +{ + size_t str_size = strlen (src); + + if (dest_tot_size > str_size) + { + strcpy (dest, src); + return str_size; + } + else + { + if (dest_tot_size > 0) + { + str_size = dest_tot_size - 1; + memcpy (dest, src, str_size); + dest[str_size] = 0; + return str_size; + } + else + return 0; + } +} diff --git a/grub-core/lib/libtasn1/lib/gstr.h b/grub-core/lib/libtasn1/lib/gstr.h new file mode 100644 index 000000000..cd47d145c --- /dev/null +++ b/grub-core/lib/libtasn1/lib/gstr.h @@ -0,0 +1,50 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +#ifndef GSTR_H +# define GSTR_H + +unsigned int _asn1_str_cpy (char *dest, size_t dest_tot_size, + const char *src); +void _asn1_str_cat (char *dest, size_t dest_tot_size, const char *src); + +# define Estrcpy(x,y) _asn1_str_cpy(x,ASN1_MAX_ERROR_DESCRIPTION_SIZE,y) +# define Estrcat(x,y) _asn1_str_cat(x,ASN1_MAX_ERROR_DESCRIPTION_SIZE,y) + +inline static void +safe_memset (void *data, int c, size_t size) +{ + volatile unsigned volatile_zero = 0; + volatile char *vdata = (volatile char *) data; + + /* This is based on a nice trick for safe memset, + * sent by David Jacobson in the openssl-dev mailing list. + */ + + if (size > 0) + do + { + memset (data, c, size); + } + while (vdata[volatile_zero] != c); +} + +#endif /* GSTR_H */ diff --git a/grub-core/lib/libtasn1/lib/int.h b/grub-core/lib/libtasn1/lib/int.h new file mode 100644 index 000000000..404cd1562 --- /dev/null +++ b/grub-core/lib/libtasn1/lib/int.h @@ -0,0 +1,221 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +#ifndef INT_H +# define INT_H + +# ifdef HAVE_CONFIG_H +# include <config.h> +# endif + +# include <string.h> +# include <stdlib.h> +# include <stdio.h> +# include <stdint.h> + +# ifdef HAVE_SYS_TYPES_H +# include <sys/types.h> +# endif + +# include <libtasn1.h> + +# define ASN1_SMALL_VALUE_SIZE 16 + +/* This structure is also in libtasn1.h, but then contains less + fields. You cannot make any modifications to these first fields + without breaking ABI. */ +struct asn1_node_st +{ + /* public fields: */ + char name[ASN1_MAX_NAME_SIZE + 1]; /* Node name */ + unsigned int name_hash; + unsigned int type; /* Node type */ + unsigned char *value; /* Node value */ + int value_len; + asn1_node down; /* Pointer to the son node */ + asn1_node right; /* Pointer to the brother node */ + asn1_node left; /* Pointer to the next list element */ + /* private fields: */ + unsigned char small_value[ASN1_SMALL_VALUE_SIZE]; /* For small values */ + + /* values used during decoding/coding */ + int tmp_ival; + unsigned start; /* the start of the DER sequence - if decoded */ + unsigned end; /* the end of the DER sequence - if decoded */ +}; + +typedef struct tag_and_class_st +{ + unsigned tag; + unsigned class; + const char *desc; +} tag_and_class_st; + +/* the types that are handled in _asn1_tags */ +# define CASE_HANDLED_ETYPES \ + case ASN1_ETYPE_NULL: \ + case ASN1_ETYPE_BOOLEAN: \ + case ASN1_ETYPE_INTEGER: \ + case ASN1_ETYPE_ENUMERATED: \ + case ASN1_ETYPE_OBJECT_ID: \ + case ASN1_ETYPE_OCTET_STRING: \ + case ASN1_ETYPE_GENERALSTRING: \ + case ASN1_ETYPE_NUMERIC_STRING: \ + case ASN1_ETYPE_IA5_STRING: \ + case ASN1_ETYPE_TELETEX_STRING: \ + case ASN1_ETYPE_PRINTABLE_STRING: \ + case ASN1_ETYPE_UNIVERSAL_STRING: \ + case ASN1_ETYPE_BMP_STRING: \ + case ASN1_ETYPE_UTF8_STRING: \ + case ASN1_ETYPE_VISIBLE_STRING: \ + case ASN1_ETYPE_BIT_STRING: \ + case ASN1_ETYPE_SEQUENCE: \ + case ASN1_ETYPE_SEQUENCE_OF: \ + case ASN1_ETYPE_SET: \ + case ASN1_ETYPE_UTC_TIME: \ + case ASN1_ETYPE_GENERALIZED_TIME: \ + case ASN1_ETYPE_SET_OF + +# define ETYPE_TAG(etype) (_asn1_tags[etype].tag) +# define ETYPE_CLASS(etype) (_asn1_tags[etype].class) +# define ETYPE_OK(etype) (((etype) != ASN1_ETYPE_INVALID && \ + (etype) <= _asn1_tags_size && \ + _asn1_tags[(etype)].desc != NULL)?1:0) + +# define ETYPE_IS_STRING(etype) ((etype == ASN1_ETYPE_GENERALSTRING || \ + etype == ASN1_ETYPE_NUMERIC_STRING || etype == ASN1_ETYPE_IA5_STRING || \ + etype == ASN1_ETYPE_TELETEX_STRING || etype == ASN1_ETYPE_PRINTABLE_STRING || \ + etype == ASN1_ETYPE_UNIVERSAL_STRING || etype == ASN1_ETYPE_BMP_STRING || \ + etype == ASN1_ETYPE_UTF8_STRING || etype == ASN1_ETYPE_VISIBLE_STRING || \ + etype == ASN1_ETYPE_OCTET_STRING)?1:0) + +extern unsigned int _asn1_tags_size; +extern const tag_and_class_st _asn1_tags[]; + +# define _asn1_strlen(s) strlen((const char *) s) +# define _asn1_strtol(n,e,b) strtol((const char *) n, e, b) +# define _asn1_strtoul(n,e,b) strtoul((const char *) n, e, b) +# define _asn1_strcmp(a,b) strcmp((const char *)a, (const char *)b) +# define _asn1_strcpy(a,b) strcpy((char *)a, (const char *)b) +# define _asn1_strcat(a,b) strcat((char *)a, (const char *)b) + +# if SIZEOF_UNSIGNED_LONG_INT == 8 +# define _asn1_strtou64(n,e,b) strtoul((const char *) n, e, b) +# else +# define _asn1_strtou64(n,e,b) strtoull((const char *) n, e, b) +# endif + +# define MAX_LOG_SIZE 1024 /* maximum number of characters of a log message */ + +/* Define used for visiting trees. */ +# define UP 1 +# define RIGHT 2 +# define DOWN 3 + +/***********************************************************************/ +/* List of constants to better specify the type of typedef asn1_node_st. */ +/***********************************************************************/ +/* Used with TYPE_TAG */ +# define CONST_UNIVERSAL (1U<<8) +# define CONST_PRIVATE (1U<<9) +# define CONST_APPLICATION (1U<<10) +# define CONST_EXPLICIT (1U<<11) +# define CONST_IMPLICIT (1U<<12) + +# define CONST_TAG (1U<<13) /* Used in ASN.1 assignement */ +# define CONST_OPTION (1U<<14) +# define CONST_DEFAULT (1U<<15) +# define CONST_TRUE (1U<<16) +# define CONST_FALSE (1U<<17) + +# define CONST_LIST (1U<<18) /* Used with TYPE_INTEGER and TYPE_BIT_STRING */ +# define CONST_MIN_MAX (1U<<19) + +# define CONST_1_PARAM (1U<<20) + +# define CONST_SIZE (1U<<21) + +# define CONST_DEFINED_BY (1U<<22) + +/* Those two are deprecated and used for backwards compatibility */ +# define CONST_GENERALIZED (1U<<23) +# define CONST_UTC (1U<<24) + +/* #define CONST_IMPORTS (1U<<25) */ + +# define CONST_NOT_USED (1U<<26) +# define CONST_SET (1U<<27) +# define CONST_ASSIGN (1U<<28) + +# define CONST_DOWN (1U<<29) +# define CONST_RIGHT (1U<<30) + + +# define ASN1_ETYPE_TIME 17 +/****************************************/ +/* Returns the first 8 bits. */ +/* Used with the field type of asn1_node_st */ +/****************************************/ +inline static unsigned int +type_field (unsigned int ntype) +{ + return (ntype & 0xff); +} + +/* To convert old types from a static structure */ +inline static unsigned int +convert_old_type (unsigned int ntype) +{ + unsigned int type = ntype & 0xff; + if (type == ASN1_ETYPE_TIME) + { + if (ntype & CONST_UTC) + type = ASN1_ETYPE_UTC_TIME; + else + type = ASN1_ETYPE_GENERALIZED_TIME; + + ntype &= ~(CONST_UTC | CONST_GENERALIZED); + ntype &= 0xffffff00; + ntype |= type; + + return ntype; + } + else + return ntype; +} + +static inline void * +_asn1_realloc (void *ptr, size_t size) +{ + void *ret; + + if (size == 0) + return ptr; + + ret = realloc (ptr, size); + if (ret == NULL) + { + free (ptr); + } + return ret; +} + +#endif /* INT_H */ diff --git a/grub-core/lib/libtasn1/lib/parser_aux.c b/grub-core/lib/libtasn1/lib/parser_aux.c new file mode 100644 index 000000000..c99c5a4cb --- /dev/null +++ b/grub-core/lib/libtasn1/lib/parser_aux.c @@ -0,0 +1,1178 @@ +/* + * Copyright (C) 2000-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +#include <limits.h> // WORD_BIT + +#include "int.h" +#include "parser_aux.h" +#include "gstr.h" +#include "structure.h" +#include "element.h" +#include "c-ctype.h" + +char _asn1_identifierMissing[ASN1_MAX_NAME_SIZE + 1]; /* identifier name not found */ + +/* Return a hash of the N bytes of X using the method described by + Bruno Haible in https://www.haible.de/bruno/hashfunc.html. + Note that while many hash functions reduce their result via modulo + to a 0..table_size-1 range, this function does not do that. + + This implementation has been changed from size_t -> unsigned int. */ + +#ifdef __clang__ +__attribute__((no_sanitize ("integer"))) +#endif + _GL_ATTRIBUTE_PURE static unsigned int _asn1_hash_name (const char *x) +{ + const unsigned char *s = (unsigned char *) x; + unsigned h = 0; + + while (*s) + h = (*s++) + ((h << 9) | (h >> (WORD_BIT - 9))); + + return h; +} + +/******************************************************/ +/* Function : _asn1_add_static_node */ +/* Description: creates a new NODE_ASN element and */ +/* puts it in the list pointed by e_list. */ +/* Parameters: */ +/* e_list: of type list_type; must be NULL initially */ +/* type: type of the new element (see ASN1_ETYPE_ */ +/* and CONST_ constants). */ +/* Return: pointer to the new element. */ +/******************************************************/ +asn1_node +_asn1_add_static_node (list_type ** e_list, unsigned int type) +{ + list_type *p; + asn1_node punt; + + punt = calloc (1, sizeof (struct asn1_node_st)); + if (punt == NULL) + return NULL; + + p = malloc (sizeof (list_type)); + if (p == NULL) + { + free (punt); + return NULL; + } + + p->node = punt; + p->next = *e_list; + *e_list = p; + + punt->type = type; + + return punt; +} + +static int +_asn1_add_static_node2 (list_type ** e_list, asn1_node node) +{ + list_type *p; + + p = malloc (sizeof (list_type)); + if (p == NULL) + { + return -1; + } + + p->node = node; + p->next = *e_list; + *e_list = p; + + return 0; +} + +/** + * asn1_find_node: + * @pointer: NODE_ASN element pointer. + * @name: null terminated string with the element's name to find. + * + * Searches for an element called @name starting from @pointer. The + * name is composed by different identifiers separated by dots. When + * *@pointer has a name, the first identifier must be the name of + * *@pointer, otherwise it must be the name of one child of *@pointer. + * + * Returns: the search result, or %NULL if not found. + **/ +asn1_node +asn1_find_node (asn1_node_const pointer, const char *name) +{ + asn1_node_const p; + char *n_end, n[ASN1_MAX_NAME_SIZE + 1]; + const char *n_start; + unsigned int nsize; + unsigned int nhash; + + if (pointer == NULL) + return NULL; + + if (name == NULL) + return NULL; + + p = pointer; + n_start = name; + + if (name[0] == '?' && name[1] == 'C' && p->name[0] == '?') + { /* ?CURRENT */ + n_start = strchr (n_start, '.'); + if (n_start) + n_start++; + } + else if (p->name[0] != 0) + { /* has *pointer got a name ? */ + n_end = strchr (n_start, '.'); /* search the first dot */ + if (n_end) + { + nsize = n_end - n_start; + if (nsize >= sizeof (n)) + return NULL; + + memcpy (n, n_start, nsize); + n[nsize] = 0; + n_start = n_end; + n_start++; + + nhash = _asn1_hash_name (n); + } + else + { + _asn1_str_cpy (n, sizeof (n), n_start); + nhash = _asn1_hash_name (n); + + n_start = NULL; + } + + while (p) + { + if (nhash == p->name_hash && (!strcmp (p->name, n))) + break; + else + p = p->right; + } /* while */ + + if (p == NULL) + return NULL; + } + else + { /* *pointer doesn't have a name */ + if (n_start[0] == 0) + return (asn1_node) p; + } + + while (n_start) + { /* Has the end of NAME been reached? */ + n_end = strchr (n_start, '.'); /* search the next dot */ + if (n_end) + { + nsize = n_end - n_start; + if (nsize >= sizeof (n)) + return NULL; + + memcpy (n, n_start, nsize); + n[nsize] = 0; + n_start = n_end; + n_start++; + + nhash = _asn1_hash_name (n); + } + else + { + _asn1_str_cpy (n, sizeof (n), n_start); + nhash = _asn1_hash_name (n); + n_start = NULL; + } + + if (p->down == NULL) + return NULL; + + p = p->down; + if (p == NULL) + return NULL; + + /* The identifier "?LAST" indicates the last element + in the right chain. */ + if (n[0] == '?' && n[1] == 'L') /* ?LAST */ + { + while (p->right) + p = p->right; + } + else + { /* no "?LAST" */ + while (p) + { + if (p->name_hash == nhash && !strcmp (p->name, n)) + break; + else + p = p->right; + } + } + if (p == NULL) + return NULL; + } /* while */ + + return (asn1_node) p; +} + + +/******************************************************************/ +/* Function : _asn1_set_value */ +/* Description: sets the field VALUE in a NODE_ASN element. The */ +/* previous value (if exist) will be lost */ +/* Parameters: */ +/* node: element pointer. */ +/* value: pointer to the value that you want to set. */ +/* len: character number of value. */ +/* Return: pointer to the NODE_ASN element. */ +/******************************************************************/ +asn1_node +_asn1_set_value (asn1_node node, const void *value, unsigned int len) +{ + if (node == NULL) + return node; + if (node->value) + { + if (node->value != node->small_value) + free (node->value); + node->value = NULL; + node->value_len = 0; + } + + if (!len) + return node; + + if (len < sizeof (node->small_value)) + { + node->value = node->small_value; + } + else + { + node->value = malloc (len); + if (node->value == NULL) + return NULL; + } + node->value_len = len; + + memcpy (node->value, value, len); + return node; +} + +/******************************************************************/ +/* Function : _asn1_set_value_lv */ +/* Description: sets the field VALUE in a NODE_ASN element. The */ +/* previous value (if exist) will be lost. The value */ +/* given is stored as an length-value format (LV */ +/* Parameters: */ +/* node: element pointer. */ +/* value: pointer to the value that you want to set. */ +/* len: character number of value. */ +/* Return: pointer to the NODE_ASN element. */ +/******************************************************************/ +asn1_node +_asn1_set_value_lv (asn1_node node, const void *value, unsigned int len) +{ + int len2; + void *temp; + + if (node == NULL) + return node; + + asn1_length_der (len, NULL, &len2); + temp = malloc (len + len2); + if (temp == NULL) + return NULL; + + asn1_octet_der (value, len, temp, &len2); + return _asn1_set_value_m (node, temp, len2); +} + +/* the same as _asn1_set_value except that it sets an already malloc'ed + * value. + */ +asn1_node +_asn1_set_value_m (asn1_node node, void *value, unsigned int len) +{ + if (node == NULL) + return node; + + if (node->value) + { + if (node->value != node->small_value) + free (node->value); + node->value = NULL; + node->value_len = 0; + } + + if (!len) + return node; + + node->value = value; + node->value_len = len; + + return node; +} + +/******************************************************************/ +/* Function : _asn1_append_value */ +/* Description: appends to the field VALUE in a NODE_ASN element. */ +/* */ +/* Parameters: */ +/* node: element pointer. */ +/* value: pointer to the value that you want to be appended. */ +/* len: character number of value. */ +/* Return: pointer to the NODE_ASN element. */ +/******************************************************************/ +asn1_node +_asn1_append_value (asn1_node node, const void *value, unsigned int len) +{ + if (node == NULL) + return node; + + if (node->value == NULL) + return _asn1_set_value (node, value, len); + + if (len == 0) + return node; + + if (node->value == node->small_value) + { + /* value is in node */ + int prev_len = node->value_len; + node->value_len += len; + node->value = malloc (node->value_len); + if (node->value == NULL) + { + node->value_len = 0; + return NULL; + } + + if (prev_len > 0) + memcpy (node->value, node->small_value, prev_len); + + memcpy (&node->value[prev_len], value, len); + + return node; + } + else /* if (node->value != NULL && node->value != node->small_value) */ + { + /* value is allocated */ + int prev_len = node->value_len; + node->value_len += len; + + node->value = _asn1_realloc (node->value, node->value_len); + if (node->value == NULL) + { + node->value_len = 0; + return NULL; + } + + memcpy (&node->value[prev_len], value, len); + + return node; + } +} + +/******************************************************************/ +/* Function : _asn1_set_name */ +/* Description: sets the field NAME in a NODE_ASN element. The */ +/* previous value (if exist) will be lost */ +/* Parameters: */ +/* node: element pointer. */ +/* name: a null terminated string with the name that you want */ +/* to set. */ +/* Return: pointer to the NODE_ASN element. */ +/******************************************************************/ +asn1_node +_asn1_set_name (asn1_node node, const char *name) +{ + if (node == NULL) + return node; + + _asn1_str_cpy (node->name, sizeof (node->name), name ? name : ""); + node->name_hash = _asn1_hash_name (node->name); + + return node; +} + +/******************************************************************/ +/* Function : _asn1_cpy_name */ +/* Description: copies the field NAME in a NODE_ASN element. */ +/* Parameters: */ +/* dst: a dest element pointer. */ +/* src: a source element pointer. */ +/* Return: pointer to the NODE_ASN element. */ +/******************************************************************/ +asn1_node +_asn1_cpy_name (asn1_node dst, asn1_node_const src) +{ + if (dst == NULL) + return dst; + + if (src == NULL) + { + dst->name[0] = 0; + dst->name_hash = _asn1_hash_name (dst->name); + return dst; + } + + _asn1_str_cpy (dst->name, sizeof (dst->name), src->name); + dst->name_hash = src->name_hash; + + return dst; +} + +/******************************************************************/ +/* Function : _asn1_set_right */ +/* Description: sets the field RIGHT in a NODE_ASN element. */ +/* Parameters: */ +/* node: element pointer. */ +/* right: pointer to a NODE_ASN element that you want be pointed*/ +/* by NODE. */ +/* Return: pointer to *NODE. */ +/******************************************************************/ +asn1_node +_asn1_set_right (asn1_node node, asn1_node right) +{ + if (node == NULL) + return node; + node->right = right; + if (right) + right->left = node; + return node; +} + + +/******************************************************************/ +/* Function : _asn1_get_last_right */ +/* Description: return the last element along the right chain. */ +/* Parameters: */ +/* node: starting element pointer. */ +/* Return: pointer to the last element along the right chain. */ +/******************************************************************/ +asn1_node +_asn1_get_last_right (asn1_node_const node) +{ + asn1_node_const p; + + if (node == NULL) + return NULL; + p = node; + while (p->right) + p = p->right; + return (asn1_node) p; +} + +/******************************************************************/ +/* Function : _asn1_remove_node */ +/* Description: gets free the memory allocated for an NODE_ASN */ +/* element (not the elements pointed by it). */ +/* Parameters: */ +/* node: NODE_ASN element pointer. */ +/* flags: ASN1_DELETE_FLAG_* */ +/******************************************************************/ +void +_asn1_remove_node (asn1_node node, unsigned int flags) +{ + if (node == NULL) + return; + + if (node->value != NULL) + { + if (flags & ASN1_DELETE_FLAG_ZEROIZE) + { + safe_memset (node->value, 0, node->value_len); + } + + if (node->value != node->small_value) + free (node->value); + } + free (node); +} + +/******************************************************************/ +/* Function : _asn1_find_up */ +/* Description: return the father of the NODE_ASN element. */ +/* Parameters: */ +/* node: NODE_ASN element pointer. */ +/* Return: Null if not found. */ +/******************************************************************/ +asn1_node +_asn1_find_up (asn1_node_const node) +{ + asn1_node_const p; + + if (node == NULL) + return NULL; + + p = node; + + while ((p->left != NULL) && (p->left->right == p)) + p = p->left; + + return p->left; +} + +static unsigned +_asn1_is_up (asn1_node_const up_cand, asn1_node_const down) +{ + asn1_node_const d, u; + + if (up_cand == NULL || down == NULL) + return 0; + + d = down; + + while ((u = _asn1_find_up (d)) != NULL && u != d) + { + if (u == up_cand) + return 1; + d = u; + } + + return 0; +} + +/******************************************************************/ +/* Function : _asn1_delete_node_from_list */ +/* Description: deletes the list element given */ +/******************************************************************/ +void +_asn1_delete_node_from_list (list_type * list, asn1_node node) +{ + list_type *p = list; + + while (p) + { + if (p->node == node) + p->node = NULL; + p = p->next; + } +} + +/******************************************************************/ +/* Function : _asn1_delete_list */ +/* Description: deletes the list elements (not the elements */ +/* pointed by them). */ +/******************************************************************/ +void +_asn1_delete_list (list_type * e_list) +{ + list_type *p; + + while (e_list) + { + p = e_list; + e_list = e_list->next; + free (p); + } +} + +/******************************************************************/ +/* Function : _asn1_delete_list_and nodes */ +/* Description: deletes the list elements and the elements */ +/* pointed by them. */ +/******************************************************************/ +void +_asn1_delete_list_and_nodes (list_type * e_list) +{ + list_type *p; + + while (e_list) + { + p = e_list; + e_list = e_list->next; + _asn1_remove_node (p->node, 0); + free (p); + } +} + + +char * +_asn1_ltostr (int64_t v, char str[LTOSTR_MAX_SIZE]) +{ + uint64_t d, r; + char temp[LTOSTR_MAX_SIZE]; + int count, k, start; + uint64_t val; + + if (v < 0) + { + str[0] = '-'; + start = 1; + val = -((uint64_t) v); + } + else + { + val = v; + start = 0; + } + + count = 0; + do + { + d = val / 10; + r = val - d * 10; + temp[start + count] = '0' + (char) r; + count++; + val = d; + } + while (val && ((start + count) < LTOSTR_MAX_SIZE - 1)); + + for (k = 0; k < count; k++) + str[k + start] = temp[start + count - k - 1]; + str[count + start] = 0; + return str; +} + + +/******************************************************************/ +/* Function : _asn1_change_integer_value */ +/* Description: converts into DER coding the value assign to an */ +/* INTEGER constant. */ +/* Parameters: */ +/* node: root of an ASN1element. */ +/* Return: */ +/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL, */ +/* otherwise ASN1_SUCCESS */ +/******************************************************************/ +int +_asn1_change_integer_value (asn1_node node) +{ + asn1_node p; + unsigned char val[SIZEOF_UNSIGNED_LONG_INT]; + unsigned char val2[SIZEOF_UNSIGNED_LONG_INT + 1]; + int len; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = node; + while (p) + { + if ((type_field (p->type) == ASN1_ETYPE_INTEGER) + && (p->type & CONST_ASSIGN)) + { + if (p->value) + { + _asn1_convert_integer (p->value, val, sizeof (val), &len); + asn1_octet_der (val, len, val2, &len); + _asn1_set_value (p, val2, len); + } + } + + if (p->down) + { + p = p->down; + } + else + { + if (p == node) + p = NULL; + else if (p->right) + p = p->right; + else + { + while (1) + { + p = _asn1_find_up (p); + if (p == node) + { + p = NULL; + break; + } + if (p && p->right) + { + p = p->right; + break; + } + } + } + } + } + + return ASN1_SUCCESS; +} + +#define MAX_CONSTANTS 1024 +/******************************************************************/ +/* Function : _asn1_expand_object_id */ +/* Description: expand the IDs of an OBJECT IDENTIFIER constant. */ +/* Parameters: */ +/* list: root of an object list */ +/* node: root of an ASN1 element. */ +/* Return: */ +/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL, */ +/* otherwise ASN1_SUCCESS */ +/******************************************************************/ +int +_asn1_expand_object_id (list_type ** list, asn1_node node) +{ + asn1_node p, p2, p3, p4, p5; + char name_root[ASN1_MAX_NAME_SIZE], name2[2 * ASN1_MAX_NAME_SIZE + 1]; + int move, tlen, tries; + unsigned max_constants; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + _asn1_str_cpy (name_root, sizeof (name_root), node->name); + + p = node; + move = DOWN; + tries = 0; + + while (!((p == node) && (move == UP))) + { + if (move != UP) + { + if ((type_field (p->type) == ASN1_ETYPE_OBJECT_ID) + && (p->type & CONST_ASSIGN)) + { + p2 = p->down; + if (p2 && (type_field (p2->type) == ASN1_ETYPE_CONSTANT)) + { + if (p2->value && !c_isdigit (p2->value[0])) + { + _asn1_str_cpy (name2, sizeof (name2), name_root); + _asn1_str_cat (name2, sizeof (name2), "."); + _asn1_str_cat (name2, sizeof (name2), + (char *) p2->value); + p3 = asn1_find_node (node, name2); + if (!p3 || _asn1_is_up (p2, p3) || + (type_field (p3->type) != ASN1_ETYPE_OBJECT_ID) || + !(p3->type & CONST_ASSIGN)) + return ASN1_ELEMENT_NOT_FOUND; + + _asn1_set_down (p, p2->right); + if (p2->down) + _asn1_delete_structure (*list, &p2->down, 0); + _asn1_delete_node_from_list (*list, p2); + _asn1_remove_node (p2, 0); + p2 = p; + p4 = p3->down; + max_constants = 0; + while (p4) + { + if (type_field (p4->type) == ASN1_ETYPE_CONSTANT) + { + max_constants++; + if (max_constants == MAX_CONSTANTS) + return ASN1_RECURSION; + + p5 = + _asn1_add_single_node (ASN1_ETYPE_CONSTANT); + _asn1_set_name (p5, p4->name); + if (p4->value) + { + tlen = _asn1_strlen (p4->value); + if (tlen > 0) + _asn1_set_value (p5, p4->value, tlen + 1); + } + _asn1_add_static_node2 (list, p5); + + if (p2 == p) + { + _asn1_set_right (p5, p->down); + _asn1_set_down (p, p5); + } + else + { + _asn1_set_right (p5, p2->right); + _asn1_set_right (p2, p5); + } + p2 = p5; + } + p4 = p4->right; + } + move = DOWN; + + tries++; + if (tries >= EXPAND_OBJECT_ID_MAX_RECURSION) + return ASN1_RECURSION; + + continue; + } + } + } + move = DOWN; + } + else + move = RIGHT; + + tries = 0; + if (move == DOWN) + { + if (p->down) + p = p->down; + else + move = RIGHT; + } + + if (p == node) + { + move = UP; + continue; + } + + if (move == RIGHT) + { + if (p && p->right) + p = p->right; + else + move = UP; + } + if (move == UP) + p = _asn1_find_up (p); + } + + /*******************************/ + /* expand DEFAULT */ + /*******************************/ + p = node; + move = DOWN; + + while (!((p == node) && (move == UP))) + { + if (move != UP) + { + if ((type_field (p->type) == ASN1_ETYPE_OBJECT_ID) && + (p->type & CONST_DEFAULT)) + { + p2 = p->down; + if (p2 && (type_field (p2->type) == ASN1_ETYPE_DEFAULT)) + { + _asn1_str_cpy (name2, sizeof (name2), name_root); + _asn1_str_cat (name2, sizeof (name2), "."); + if (p2->value) + _asn1_str_cat (name2, sizeof (name2), (char *) p2->value); + p3 = asn1_find_node (node, name2); + if (!p3 || (type_field (p3->type) != ASN1_ETYPE_OBJECT_ID) + || !(p3->type & CONST_ASSIGN)) + return ASN1_ELEMENT_NOT_FOUND; + p4 = p3->down; + name2[0] = 0; + while (p4) + { + if (type_field (p4->type) == ASN1_ETYPE_CONSTANT) + { + if (p4->value == NULL) + return ASN1_VALUE_NOT_FOUND; + + if (name2[0]) + _asn1_str_cat (name2, sizeof (name2), "."); + _asn1_str_cat (name2, sizeof (name2), + (char *) p4->value); + } + p4 = p4->right; + } + tlen = strlen (name2); + if (tlen > 0) + _asn1_set_value (p2, name2, tlen + 1); + } + } + move = DOWN; + } + else + move = RIGHT; + + if (move == DOWN) + { + if (p->down) + p = p->down; + else + move = RIGHT; + } + + if (p == node) + { + move = UP; + continue; + } + + if (move == RIGHT) + { + if (p && p->right) + p = p->right; + else + move = UP; + } + if (move == UP) + p = _asn1_find_up (p); + } + + return ASN1_SUCCESS; +} + + +/******************************************************************/ +/* Function : _asn1_type_set_config */ +/* Description: sets the CONST_SET and CONST_NOT_USED properties */ +/* in the fields of the SET elements. */ +/* Parameters: */ +/* node: root of an ASN1 element. */ +/* Return: */ +/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL, */ +/* otherwise ASN1_SUCCESS */ +/******************************************************************/ +int +_asn1_type_set_config (asn1_node node) +{ + asn1_node p, p2; + int move; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = node; + move = DOWN; + + while (!((p == node) && (move == UP))) + { + if (move != UP) + { + if (type_field (p->type) == ASN1_ETYPE_SET) + { + p2 = p->down; + while (p2) + { + if (type_field (p2->type) != ASN1_ETYPE_TAG) + p2->type |= CONST_SET | CONST_NOT_USED; + p2 = p2->right; + } + } + move = DOWN; + } + else + move = RIGHT; + + if (move == DOWN) + { + if (p->down) + p = p->down; + else + move = RIGHT; + } + + if (p == node) + { + move = UP; + continue; + } + + if (move == RIGHT) + { + if (p && p->right) + p = p->right; + else + move = UP; + } + if (move == UP) + p = _asn1_find_up (p); + } + + return ASN1_SUCCESS; +} + + +/******************************************************************/ +/* Function : _asn1_check_identifier */ +/* Description: checks the definitions of all the identifiers */ +/* and the first element of an OBJECT_ID (e.g. {pkix 0 4}). */ +/* The _asn1_identifierMissing global variable is filled if */ +/* necessary. */ +/* Parameters: */ +/* node: root of an ASN1 element. */ +/* Return: */ +/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL, */ +/* ASN1_IDENTIFIER_NOT_FOUND if an identifier is not defined, */ +/* otherwise ASN1_SUCCESS */ +/******************************************************************/ +int +_asn1_check_identifier (asn1_node_const node) +{ + asn1_node_const p, p2; + char name2[ASN1_MAX_NAME_SIZE * 2 + 2]; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = node; + while (p) + { + if (p->value && type_field (p->type) == ASN1_ETYPE_IDENTIFIER) + { + _asn1_str_cpy (name2, sizeof (name2), node->name); + _asn1_str_cat (name2, sizeof (name2), "."); + _asn1_str_cat (name2, sizeof (name2), (char *) p->value); + p2 = asn1_find_node (node, name2); + if (p2 == NULL) + { + if (p->value) + _asn1_str_cpy (_asn1_identifierMissing, + sizeof (_asn1_identifierMissing), + (char *) p->value); + else + _asn1_strcpy (_asn1_identifierMissing, "(null)"); + return ASN1_IDENTIFIER_NOT_FOUND; + } + } + else if ((type_field (p->type) == ASN1_ETYPE_OBJECT_ID) && + (p->type & CONST_DEFAULT)) + { + p2 = p->down; + if (p2 && (type_field (p2->type) == ASN1_ETYPE_DEFAULT)) + { + _asn1_str_cpy (name2, sizeof (name2), node->name); + if (p2->value) + { + _asn1_str_cat (name2, sizeof (name2), "."); + _asn1_str_cat (name2, sizeof (name2), (char *) p2->value); + _asn1_str_cpy (_asn1_identifierMissing, + sizeof (_asn1_identifierMissing), + (char *) p2->value); + } + else + _asn1_strcpy (_asn1_identifierMissing, "(null)"); + + p2 = asn1_find_node (node, name2); + if (!p2 || (type_field (p2->type) != ASN1_ETYPE_OBJECT_ID) || + !(p2->type & CONST_ASSIGN)) + return ASN1_IDENTIFIER_NOT_FOUND; + else + _asn1_identifierMissing[0] = 0; + } + } + else if ((type_field (p->type) == ASN1_ETYPE_OBJECT_ID) && + (p->type & CONST_ASSIGN)) + { + p2 = p->down; + if (p2 && (type_field (p2->type) == ASN1_ETYPE_CONSTANT)) + { + if (p2->value && !c_isdigit (p2->value[0])) + { + _asn1_str_cpy (name2, sizeof (name2), node->name); + _asn1_str_cat (name2, sizeof (name2), "."); + _asn1_str_cat (name2, sizeof (name2), (char *) p2->value); + _asn1_str_cpy (_asn1_identifierMissing, + sizeof (_asn1_identifierMissing), + (char *) p2->value); + + p2 = asn1_find_node (node, name2); + if (!p2 || (type_field (p2->type) != ASN1_ETYPE_OBJECT_ID) + || !(p2->type & CONST_ASSIGN)) + return ASN1_IDENTIFIER_NOT_FOUND; + else + _asn1_identifierMissing[0] = 0; + } + } + } + + if (p->down) + { + p = p->down; + } + else if (p->right) + p = p->right; + else + { + while (p) + { + p = _asn1_find_up (p); + if (p == node) + { + p = NULL; + break; + } + if (p && p->right) + { + p = p->right; + break; + } + } + } + } + + return ASN1_SUCCESS; +} + + +/******************************************************************/ +/* Function : _asn1_set_default_tag */ +/* Description: sets the default IMPLICIT or EXPLICIT property in */ +/* the tagged elements that don't have this declaration. */ +/* Parameters: */ +/* node: pointer to a DEFINITIONS element. */ +/* Return: */ +/* ASN1_ELEMENT_NOT_FOUND if NODE is NULL or not a pointer to */ +/* a DEFINITIONS element, */ +/* otherwise ASN1_SUCCESS */ +/******************************************************************/ +int +_asn1_set_default_tag (asn1_node node) +{ + asn1_node p; + + if ((node == NULL) || (type_field (node->type) != ASN1_ETYPE_DEFINITIONS)) + return ASN1_ELEMENT_NOT_FOUND; + + p = node; + while (p) + { + if ((type_field (p->type) == ASN1_ETYPE_TAG) && + !(p->type & CONST_EXPLICIT) && !(p->type & CONST_IMPLICIT)) + { + if (node->type & CONST_EXPLICIT) + p->type |= CONST_EXPLICIT; + else + p->type |= CONST_IMPLICIT; + } + + if (p->down) + { + p = p->down; + } + else if (p->right) + p = p->right; + else + { + while (1) + { + p = _asn1_find_up (p); + if (p == node) + { + p = NULL; + break; + } + if (p && p->right) + { + p = p->right; + break; + } + } + } + } + + return ASN1_SUCCESS; +} diff --git a/grub-core/lib/libtasn1/lib/parser_aux.h b/grub-core/lib/libtasn1/lib/parser_aux.h new file mode 100644 index 000000000..b21235eb1 --- /dev/null +++ b/grub-core/lib/libtasn1/lib/parser_aux.h @@ -0,0 +1,172 @@ +/* + * Copyright (C) 2000-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +#ifndef _PARSER_AUX_H +# define _PARSER_AUX_H + +/***********************************************/ +/* Type: list_type */ +/* Description: type used in the list during */ +/* the structure creation. */ +/***********************************************/ +typedef struct list_struct +{ + asn1_node node; + struct list_struct *next; +} list_type; + +/***************************************/ +/* Functions used by ASN.1 parser */ +/***************************************/ +asn1_node _asn1_add_static_node (list_type ** e_list, unsigned int type); + +void _asn1_delete_list (list_type * e_list); + +void _asn1_delete_list_and_nodes (list_type * e_list); + +void _asn1_delete_node_from_list (list_type * list, asn1_node node); + +asn1_node +_asn1_set_value (asn1_node node, const void *value, unsigned int len); + +asn1_node _asn1_set_value_m (asn1_node node, void *value, unsigned int len); + +asn1_node +_asn1_set_value_lv (asn1_node node, const void *value, unsigned int len); + +asn1_node +_asn1_append_value (asn1_node node, const void *value, unsigned int len); + +asn1_node _asn1_set_name (asn1_node node, const char *name); + +asn1_node _asn1_cpy_name (asn1_node dst, asn1_node_const src); + +asn1_node _asn1_set_right (asn1_node node, asn1_node right); + +asn1_node _asn1_get_last_right (asn1_node_const node); + +void _asn1_remove_node (asn1_node node, unsigned int flags); + +/* Max 64-bit integer length is 20 chars + 1 for sign + 1 for null termination */ +# define LTOSTR_MAX_SIZE 22 +char *_asn1_ltostr (int64_t v, char str[LTOSTR_MAX_SIZE]); + +asn1_node _asn1_find_up (asn1_node_const node); + +int _asn1_change_integer_value (asn1_node node); + +# define EXPAND_OBJECT_ID_MAX_RECURSION 16 +int _asn1_expand_object_id (list_type ** list, asn1_node node); + +int _asn1_type_set_config (asn1_node node); + +int _asn1_check_identifier (asn1_node_const node); + +int _asn1_set_default_tag (asn1_node node); + +/******************************************************************/ +/* Function : _asn1_get_right */ +/* Description: returns the element pointed by the RIGHT field of */ +/* a NODE_ASN element. */ +/* Parameters: */ +/* node: NODE_ASN element pointer. */ +/* Return: field RIGHT of NODE. */ +/******************************************************************/ +inline static asn1_node +_asn1_get_right (asn1_node_const node) +{ + if (node == NULL) + return NULL; + return node->right; +} + +/******************************************************************/ +/* Function : _asn1_set_down */ +/* Description: sets the field DOWN in a NODE_ASN element. */ +/* Parameters: */ +/* node: element pointer. */ +/* down: pointer to a NODE_ASN element that you want be pointed */ +/* by NODE. */ +/* Return: pointer to *NODE. */ +/******************************************************************/ +inline static asn1_node +_asn1_set_down (asn1_node node, asn1_node down) +{ + if (node == NULL) + return node; + node->down = down; + if (down) + down->left = node; + return node; +} + +/******************************************************************/ +/* Function : _asn1_get_down */ +/* Description: returns the element pointed by the DOWN field of */ +/* a NODE_ASN element. */ +/* Parameters: */ +/* node: NODE_ASN element pointer. */ +/* Return: field DOWN of NODE. */ +/******************************************************************/ +inline static asn1_node +_asn1_get_down (asn1_node_const node) +{ + if (node == NULL) + return NULL; + return node->down; +} + +/******************************************************************/ +/* Function : _asn1_get_name */ +/* Description: returns the name of a NODE_ASN element. */ +/* Parameters: */ +/* node: NODE_ASN element pointer. */ +/* Return: a null terminated string. */ +/******************************************************************/ +inline static char * +_asn1_get_name (asn1_node_const node) +{ + if (node == NULL) + return NULL; + return (char *) node->name; +} + +/******************************************************************/ +/* Function : _asn1_mod_type */ +/* Description: change the field TYPE of an NODE_ASN element. */ +/* The new value is the old one | (bitwise or) the */ +/* paramener VALUE. */ +/* Parameters: */ +/* node: NODE_ASN element pointer. */ +/* value: the integer value that must be or-ed with the current */ +/* value of field TYPE. */ +/* Return: NODE pointer. */ +/******************************************************************/ +inline static asn1_node +_asn1_mod_type (asn1_node node, unsigned int value) +{ + if (node == NULL) + return node; + node->type |= value; + return node; +} + +#endif diff --git a/grub-core/lib/libtasn1/lib/structure.c b/grub-core/lib/libtasn1/lib/structure.c new file mode 100644 index 000000000..c0802202e --- /dev/null +++ b/grub-core/lib/libtasn1/lib/structure.c @@ -0,0 +1,1225 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + + +/*****************************************************/ +/* File: structure.c */ +/* Description: Functions to create and delete an */ +/* ASN1 tree. */ +/*****************************************************/ + + +#include <int.h> +#include <structure.h> +#include "parser_aux.h" +#include <gstr.h> + + +extern char _asn1_identifierMissing[]; + + +/******************************************************/ +/* Function : _asn1_add_single_node */ +/* Description: creates a new NODE_ASN element. */ +/* Parameters: */ +/* type: type of the new element (see ASN1_ETYPE_ */ +/* and CONST_ constants). */ +/* Return: pointer to the new element. */ +/******************************************************/ +asn1_node +_asn1_add_single_node (unsigned int type) +{ + asn1_node punt; + + punt = calloc (1, sizeof (struct asn1_node_st)); + if (punt == NULL) + return NULL; + + punt->type = type; + + return punt; +} + + +/******************************************************************/ +/* Function : _asn1_find_left */ +/* Description: returns the NODE_ASN element with RIGHT field that*/ +/* points the element NODE. */ +/* Parameters: */ +/* node: NODE_ASN element pointer. */ +/* Return: NULL if not found. */ +/******************************************************************/ +asn1_node +_asn1_find_left (asn1_node_const node) +{ + if ((node == NULL) || (node->left == NULL) || (node->left->down == node)) + return NULL; + + return node->left; +} + + +int +_asn1_create_static_structure (asn1_node_const pointer, + char *output_file_name, char *vector_name) +{ + FILE *file; + asn1_node_const p; + unsigned long t; + + file = fopen (output_file_name, "w"); + + if (file == NULL) + return ASN1_FILE_NOT_FOUND; + + fprintf (file, "#if HAVE_CONFIG_H\n"); + fprintf (file, "# include \"config.h\"\n"); + fprintf (file, "#endif\n\n"); + + fprintf (file, "#include <libtasn1.h>\n\n"); + + fprintf (file, "const asn1_static_node %s[] = {\n", vector_name); + + p = pointer; + + while (p) + { + fprintf (file, " { "); + + if (p->name[0] != 0) + fprintf (file, "\"%s\", ", p->name); + else + fprintf (file, "NULL, "); + + t = p->type; + if (p->down) + t |= CONST_DOWN; + if (p->right) + t |= CONST_RIGHT; + + fprintf (file, "%lu, ", t); + + if (p->value) + fprintf (file, "\"%s\"},\n", p->value); + else + fprintf (file, "NULL },\n"); + + if (p->down) + { + p = p->down; + } + else if (p->right) + { + p = p->right; + } + else + { + while (1) + { + p = _asn1_find_up (p); + if (p == pointer) + { + p = NULL; + break; + } + if (p->right) + { + p = p->right; + break; + } + } + } + } + + fprintf (file, " { NULL, 0, NULL }\n};\n"); + + fclose (file); + + return ASN1_SUCCESS; +} + + +/** + * asn1_array2tree: + * @array: specify the array that contains ASN.1 declarations + * @definitions: return the pointer to the structure created by + * *ARRAY ASN.1 declarations + * @errorDescription: return the error description. + * + * Creates the structures needed to manage the ASN.1 definitions. + * @array is a vector created by asn1_parser2array(). + * + * Returns: %ASN1_SUCCESS if structure was created correctly, + * %ASN1_ELEMENT_NOT_EMPTY if *@definitions not NULL, + * %ASN1_IDENTIFIER_NOT_FOUND if in the file there is an identifier + * that is not defined (see @errorDescription for more information), + * %ASN1_ARRAY_ERROR if the array pointed by @array is wrong. + **/ +int +asn1_array2tree (const asn1_static_node * array, asn1_node * definitions, + char *errorDescription) +{ + asn1_node p, p_last = NULL; + unsigned long k; + int move; + int result; + unsigned int type; + list_type *e_list = NULL; + + if (errorDescription) + errorDescription[0] = 0; + + if (*definitions != NULL) + return ASN1_ELEMENT_NOT_EMPTY; + + move = UP; + + for (k = 0; array[k].value || array[k].type || array[k].name; k++) + { + type = convert_old_type (array[k].type); + + p = _asn1_add_static_node (&e_list, type & (~CONST_DOWN)); + if (array[k].name) + _asn1_set_name (p, array[k].name); + if (array[k].value) + _asn1_set_value (p, array[k].value, strlen (array[k].value) + 1); + + if (*definitions == NULL) + *definitions = p; + + if (move == DOWN) + { + if (p_last && p_last->down) + _asn1_delete_structure (e_list, &p_last->down, 0); + _asn1_set_down (p_last, p); + } + else if (move == RIGHT) + { + if (p_last && p_last->right) + _asn1_delete_structure (e_list, &p_last->right, 0); + _asn1_set_right (p_last, p); + } + + p_last = p; + + if (type & CONST_DOWN) + move = DOWN; + else if (type & CONST_RIGHT) + move = RIGHT; + else + { + while (p_last != *definitions) + { + p_last = _asn1_find_up (p_last); + + if (p_last == NULL) + break; + + if (p_last->type & CONST_RIGHT) + { + p_last->type &= ~CONST_RIGHT; + move = RIGHT; + break; + } + } /* while */ + } + } /* while */ + + if (p_last == *definitions) + { + result = _asn1_check_identifier (*definitions); + if (result == ASN1_SUCCESS) + { + _asn1_change_integer_value (*definitions); + result = _asn1_expand_object_id (&e_list, *definitions); + } + } + else + { + result = ASN1_ARRAY_ERROR; + } + + if (errorDescription != NULL) + { + if (result == ASN1_IDENTIFIER_NOT_FOUND) + { + Estrcpy (errorDescription, ":: identifier '"); + Estrcat (errorDescription, _asn1_identifierMissing); + Estrcat (errorDescription, "' not found"); + } + else + errorDescription[0] = 0; + } + + if (result != ASN1_SUCCESS) + { + _asn1_delete_list_and_nodes (e_list); + *definitions = NULL; + } + else + _asn1_delete_list (e_list); + + return result; +} + +/** + * asn1_delete_structure: + * @structure: pointer to the structure that you want to delete. + * + * Deletes the structure *@structure. At the end, *@structure is set + * to NULL. + * + * Returns: %ASN1_SUCCESS if successful, %ASN1_ELEMENT_NOT_FOUND if + * *@structure was NULL. + **/ +int +asn1_delete_structure (asn1_node * structure) +{ + return _asn1_delete_structure (NULL, structure, 0); +} + +/** + * asn1_delete_structure2: + * @structure: pointer to the structure that you want to delete. + * @flags: additional flags (see %ASN1_DELETE_FLAG_ZEROIZE) + * + * Deletes the structure *@structure. At the end, *@structure is set + * to NULL. + * + * Returns: %ASN1_SUCCESS if successful, %ASN1_ELEMENT_NOT_FOUND if + * *@structure was NULL. + **/ +int +asn1_delete_structure2 (asn1_node * structure, unsigned int flags) +{ + return _asn1_delete_structure (NULL, structure, flags); +} + +int +_asn1_delete_structure (list_type * e_list, asn1_node * structure, + unsigned int flags) +{ + asn1_node p, p2, p3; + + if (*structure == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = *structure; + while (p) + { + if (p->down) + { + p = p->down; + } + else + { /* no down */ + p2 = p->right; + if (p != *structure) + { + p3 = _asn1_find_up (p); + _asn1_set_down (p3, p2); + if (e_list) + _asn1_delete_node_from_list (e_list, p); + _asn1_remove_node (p, flags); + p = p3; + } + else + { /* p==root */ + p3 = _asn1_find_left (p); + if (!p3) + { + p3 = _asn1_find_up (p); + if (p3) + _asn1_set_down (p3, p2); + else + { + if (p->right) + p->right->left = NULL; + } + } + else + _asn1_set_right (p3, p2); + if (e_list) + _asn1_delete_node_from_list (e_list, p); + _asn1_remove_node (p, flags); + p = NULL; + } + } + } + + *structure = NULL; + return ASN1_SUCCESS; +} + + +/** + * asn1_delete_element: + * @structure: pointer to the structure that contains the element you + * want to delete. + * @element_name: element's name you want to delete. + * + * Deletes the element named *@element_name inside *@structure. + * + * Returns: %ASN1_SUCCESS if successful, %ASN1_ELEMENT_NOT_FOUND if + * the @element_name was not found. + **/ +int +asn1_delete_element (asn1_node structure, const char *element_name) +{ + asn1_node p2, p3, source_node; + + source_node = asn1_find_node (structure, element_name); + + if (source_node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p2 = source_node->right; + p3 = _asn1_find_left (source_node); + if (!p3) + { + p3 = _asn1_find_up (source_node); + if (p3) + _asn1_set_down (p3, p2); + else if (source_node->right) + source_node->right->left = NULL; + } + else + _asn1_set_right (p3, p2); + + return asn1_delete_structure (&source_node); +} + +#ifndef __clang_analyzer__ +asn1_node +_asn1_copy_structure3 (asn1_node_const source_node) +{ + asn1_node_const p_s; + asn1_node dest_node, p_d, p_d_prev; + int move; + + if (source_node == NULL) + return NULL; + + dest_node = _asn1_add_single_node (source_node->type); + if (dest_node == NULL) + return dest_node; + + p_s = source_node; + p_d = dest_node; + + move = DOWN; + + do + { + if (move != UP) + { + if (p_s->name[0] != 0) + _asn1_cpy_name (p_d, p_s); + if (p_s->value) + _asn1_set_value (p_d, p_s->value, p_s->value_len); + if (p_s->down) + { + p_s = p_s->down; + p_d_prev = p_d; + p_d = _asn1_add_single_node (p_s->type); + _asn1_set_down (p_d_prev, p_d); + continue; + } + p_d->start = p_s->start; + p_d->end = p_s->end; + } + + if (p_s == source_node) + break; + + if (p_s->right) + { + move = RIGHT; + p_s = p_s->right; + p_d_prev = p_d; + p_d = _asn1_add_single_node (p_s->type); + _asn1_set_right (p_d_prev, p_d); + } + else + { + move = UP; + p_s = _asn1_find_up (p_s); + p_d = _asn1_find_up (p_d); + } + } + while (p_s != source_node); + return dest_node; +} +#else + +/* Non-production code */ +asn1_node +_asn1_copy_structure3 (asn1_node_const source_node) +{ + return NULL; +} +#endif /* __clang_analyzer__ */ + + +static asn1_node +_asn1_copy_structure2 (asn1_node_const root, const char *source_name) +{ + asn1_node source_node; + + source_node = asn1_find_node (root, source_name); + + return _asn1_copy_structure3 (source_node); + +} + + +static int +_asn1_type_choice_config (asn1_node node) +{ + asn1_node p, p2, p3, p4; + int move, tlen; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = node; + move = DOWN; + + while (!((p == node) && (move == UP))) + { + if (move != UP) + { + if ((type_field (p->type) == ASN1_ETYPE_CHOICE) + && (p->type & CONST_TAG)) + { + p2 = p->down; + while (p2) + { + if (type_field (p2->type) != ASN1_ETYPE_TAG) + { + p2->type |= CONST_TAG; + p3 = _asn1_find_left (p2); + while (p3) + { + if (type_field (p3->type) == ASN1_ETYPE_TAG) + { + p4 = _asn1_add_single_node (p3->type); + tlen = _asn1_strlen (p3->value); + if (tlen > 0) + _asn1_set_value (p4, p3->value, tlen + 1); + _asn1_set_right (p4, p2->down); + _asn1_set_down (p2, p4); + } + p3 = _asn1_find_left (p3); + } + } + p2 = p2->right; + } + p->type &= ~(CONST_TAG); + p2 = p->down; + while (p2) + { + p3 = p2->right; + if (type_field (p2->type) == ASN1_ETYPE_TAG) + asn1_delete_structure (&p2); + p2 = p3; + } + } + move = DOWN; + } + else + move = RIGHT; + + if (move == DOWN) + { + if (p->down) + p = p->down; + else + move = RIGHT; + } + + if (p == node) + { + move = UP; + continue; + } + + if (move == RIGHT) + { + if (p->right) + p = p->right; + else + move = UP; + } + if (move == UP) + p = _asn1_find_up (p); + } + + return ASN1_SUCCESS; +} + + +static int +_asn1_expand_identifier (asn1_node * node, asn1_node_const root) +{ + asn1_node p, p2, p3; + char name2[ASN1_MAX_NAME_SIZE + 2]; + int move; + + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = *node; + move = DOWN; + + while (!((p == *node) && (move == UP))) + { + if (move != UP) + { + if (type_field (p->type) == ASN1_ETYPE_IDENTIFIER) + { + snprintf (name2, sizeof (name2), "%s.%s", root->name, p->value); + p2 = _asn1_copy_structure2 (root, name2); + if (p2 == NULL) + { + return ASN1_IDENTIFIER_NOT_FOUND; + } + _asn1_cpy_name (p2, p); + p2->right = p->right; + p2->left = p->left; + if (p->right) + p->right->left = p2; + p3 = p->down; + if (p3) + { + while (p3->right) + p3 = p3->right; + _asn1_set_right (p3, p2->down); + _asn1_set_down (p2, p->down); + } + + p3 = _asn1_find_left (p); + if (p3) + _asn1_set_right (p3, p2); + else + { + p3 = _asn1_find_up (p); + if (p3) + _asn1_set_down (p3, p2); + else + { + p2->left = NULL; + } + } + + if (p->type & CONST_SIZE) + p2->type |= CONST_SIZE; + if (p->type & CONST_TAG) + p2->type |= CONST_TAG; + if (p->type & CONST_OPTION) + p2->type |= CONST_OPTION; + if (p->type & CONST_DEFAULT) + p2->type |= CONST_DEFAULT; + if (p->type & CONST_SET) + p2->type |= CONST_SET; + if (p->type & CONST_NOT_USED) + p2->type |= CONST_NOT_USED; + + if (p == *node) + *node = p2; + _asn1_remove_node (p, 0); + p = p2; + move = DOWN; + continue; + } + move = DOWN; + } + else + move = RIGHT; + + if (move == DOWN) + { + if (p->down) + p = p->down; + else + move = RIGHT; + } + + if (p == *node) + { + move = UP; + continue; + } + + if (move == RIGHT) + { + if (p->right) + p = p->right; + else + move = UP; + } + if (move == UP) + p = _asn1_find_up (p); + } + + return ASN1_SUCCESS; +} + + +/** + * asn1_create_element: + * @definitions: pointer to the structure returned by "parser_asn1" function + * @source_name: the name of the type of the new structure (must be + * inside p_structure). + * @element: pointer to the structure created. + * + * Creates a structure of type @source_name. Example using + * "pkix.asn": + * + * rc = asn1_create_element(cert_def, "PKIX1.Certificate", certptr); + * + * Returns: %ASN1_SUCCESS if creation OK, %ASN1_ELEMENT_NOT_FOUND if + * @source_name is not known. + **/ +int +asn1_create_element (asn1_node_const definitions, const char *source_name, + asn1_node * element) +{ + asn1_node dest_node; + int res; + + dest_node = _asn1_copy_structure2 (definitions, source_name); + + if (dest_node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + _asn1_set_name (dest_node, ""); + + res = _asn1_expand_identifier (&dest_node, definitions); + _asn1_type_choice_config (dest_node); + + *element = dest_node; + + return res; +} + + +/** + * asn1_print_structure: + * @out: pointer to the output file (e.g. stdout). + * @structure: pointer to the structure that you want to visit. + * @name: an element of the structure + * @mode: specify how much of the structure to print, can be + * %ASN1_PRINT_NAME, %ASN1_PRINT_NAME_TYPE, + * %ASN1_PRINT_NAME_TYPE_VALUE, or %ASN1_PRINT_ALL. + * + * Prints on the @out file descriptor the structure's tree starting + * from the @name element inside the structure @structure. + **/ +void +asn1_print_structure (FILE * out, asn1_node_const structure, const char *name, + int mode) +{ + asn1_node_const p, root; + int k, indent = 0, len, len2, len3; + + if (out == NULL) + return; + + root = asn1_find_node (structure, name); + + if (root == NULL) + return; + + p = root; + while (p) + { + if (mode == ASN1_PRINT_ALL) + { + for (k = 0; k < indent; k++) + fprintf (out, " "); + fprintf (out, "name:"); + if (p->name[0] != 0) + fprintf (out, "%s ", p->name); + else + fprintf (out, "NULL "); + } + else + { + switch (type_field (p->type)) + { + case ASN1_ETYPE_CONSTANT: + case ASN1_ETYPE_TAG: + case ASN1_ETYPE_SIZE: + break; + default: + for (k = 0; k < indent; k++) + fprintf (out, " "); + fprintf (out, "name:"); + if (p->name[0] != 0) + fprintf (out, "%s ", p->name); + else + fprintf (out, "NULL "); + } + } + + if (mode != ASN1_PRINT_NAME) + { + unsigned type = type_field (p->type); + switch (type) + { + case ASN1_ETYPE_CONSTANT: + if (mode == ASN1_PRINT_ALL) + fprintf (out, "type:CONST"); + break; + case ASN1_ETYPE_TAG: + if (mode == ASN1_PRINT_ALL) + fprintf (out, "type:TAG"); + break; + case ASN1_ETYPE_SIZE: + if (mode == ASN1_PRINT_ALL) + fprintf (out, "type:SIZE"); + break; + case ASN1_ETYPE_DEFAULT: + fprintf (out, "type:DEFAULT"); + break; + case ASN1_ETYPE_IDENTIFIER: + fprintf (out, "type:IDENTIFIER"); + break; + case ASN1_ETYPE_ANY: + fprintf (out, "type:ANY"); + break; + case ASN1_ETYPE_CHOICE: + fprintf (out, "type:CHOICE"); + break; + case ASN1_ETYPE_DEFINITIONS: + fprintf (out, "type:DEFINITIONS"); + break; + CASE_HANDLED_ETYPES: + fprintf (out, "%s", _asn1_tags[type].desc); + break; + default: + break; + } + } + + if ((mode == ASN1_PRINT_NAME_TYPE_VALUE) || (mode == ASN1_PRINT_ALL)) + { + switch (type_field (p->type)) + { + case ASN1_ETYPE_CONSTANT: + if (mode == ASN1_PRINT_ALL) + if (p->value) + fprintf (out, " value:%s", p->value); + break; + case ASN1_ETYPE_TAG: + if (mode == ASN1_PRINT_ALL) + if (p->value) + fprintf (out, " value:%s", p->value); + break; + case ASN1_ETYPE_SIZE: + if (mode == ASN1_PRINT_ALL) + if (p->value) + fprintf (out, " value:%s", p->value); + break; + case ASN1_ETYPE_DEFAULT: + if (p->value) + fprintf (out, " value:%s", p->value); + else if (p->type & CONST_TRUE) + fprintf (out, " value:TRUE"); + else if (p->type & CONST_FALSE) + fprintf (out, " value:FALSE"); + break; + case ASN1_ETYPE_IDENTIFIER: + if (p->value) + fprintf (out, " value:%s", p->value); + break; + case ASN1_ETYPE_INTEGER: + if (p->value) + { + len2 = -1; + len = asn1_get_length_der (p->value, p->value_len, &len2); + fprintf (out, " value:0x"); + if (len > 0) + for (k = 0; k < len; k++) + fprintf (out, "%02x", (unsigned) (p->value)[k + len2]); + } + break; + case ASN1_ETYPE_ENUMERATED: + if (p->value) + { + len2 = -1; + len = asn1_get_length_der (p->value, p->value_len, &len2); + fprintf (out, " value:0x"); + if (len > 0) + for (k = 0; k < len; k++) + fprintf (out, "%02x", (unsigned) (p->value)[k + len2]); + } + break; + case ASN1_ETYPE_BOOLEAN: + if (p->value) + { + if (p->value[0] == 'T') + fprintf (out, " value:TRUE"); + else if (p->value[0] == 'F') + fprintf (out, " value:FALSE"); + } + break; + case ASN1_ETYPE_BIT_STRING: + if (p->value) + { + len2 = -1; + len = asn1_get_length_der (p->value, p->value_len, &len2); + if (len > 0) + { + fprintf (out, " value(%i):", + (len - 1) * 8 - (p->value[len2])); + for (k = 1; k < len; k++) + fprintf (out, "%02x", + (unsigned) (p->value)[k + len2]); + } + } + break; + case ASN1_ETYPE_GENERALIZED_TIME: + case ASN1_ETYPE_UTC_TIME: + if (p->value) + { + fprintf (out, " value:"); + for (k = 0; k < p->value_len; k++) + fprintf (out, "%c", (p->value)[k]); + } + break; + case ASN1_ETYPE_GENERALSTRING: + case ASN1_ETYPE_NUMERIC_STRING: + case ASN1_ETYPE_IA5_STRING: + case ASN1_ETYPE_TELETEX_STRING: + case ASN1_ETYPE_PRINTABLE_STRING: + case ASN1_ETYPE_UNIVERSAL_STRING: + case ASN1_ETYPE_UTF8_STRING: + case ASN1_ETYPE_VISIBLE_STRING: + if (p->value) + { + len2 = -1; + len = asn1_get_length_der (p->value, p->value_len, &len2); + fprintf (out, " value:"); + if (len > 0) + for (k = 0; k < len; k++) + fprintf (out, "%c", (p->value)[k + len2]); + } + break; + case ASN1_ETYPE_BMP_STRING: + case ASN1_ETYPE_OCTET_STRING: + if (p->value) + { + len2 = -1; + len = asn1_get_length_der (p->value, p->value_len, &len2); + fprintf (out, " value:"); + if (len > 0) + for (k = 0; k < len; k++) + fprintf (out, "%02x", (unsigned) (p->value)[k + len2]); + } + break; + case ASN1_ETYPE_OBJECT_ID: + if (p->value) + fprintf (out, " value:%s", p->value); + break; + case ASN1_ETYPE_ANY: + if (p->value) + { + len3 = -1; + len2 = asn1_get_length_der (p->value, p->value_len, &len3); + fprintf (out, " value:"); + if (len2 > 0) + for (k = 0; k < len2; k++) + fprintf (out, "%02x", (unsigned) (p->value)[k + len3]); + } + break; + case ASN1_ETYPE_SET: + case ASN1_ETYPE_SET_OF: + case ASN1_ETYPE_CHOICE: + case ASN1_ETYPE_DEFINITIONS: + case ASN1_ETYPE_SEQUENCE_OF: + case ASN1_ETYPE_SEQUENCE: + case ASN1_ETYPE_NULL: + break; + default: + break; + } + } + + if (mode == ASN1_PRINT_ALL) + { + if (p->type & 0x1FFFFF00) + { + fprintf (out, " attr:"); + if (p->type & CONST_UNIVERSAL) + fprintf (out, "UNIVERSAL,"); + if (p->type & CONST_PRIVATE) + fprintf (out, "PRIVATE,"); + if (p->type & CONST_APPLICATION) + fprintf (out, "APPLICATION,"); + if (p->type & CONST_EXPLICIT) + fprintf (out, "EXPLICIT,"); + if (p->type & CONST_IMPLICIT) + fprintf (out, "IMPLICIT,"); + if (p->type & CONST_TAG) + fprintf (out, "TAG,"); + if (p->type & CONST_DEFAULT) + fprintf (out, "DEFAULT,"); + if (p->type & CONST_TRUE) + fprintf (out, "TRUE,"); + if (p->type & CONST_FALSE) + fprintf (out, "FALSE,"); + if (p->type & CONST_LIST) + fprintf (out, "LIST,"); + if (p->type & CONST_MIN_MAX) + fprintf (out, "MIN_MAX,"); + if (p->type & CONST_OPTION) + fprintf (out, "OPTION,"); + if (p->type & CONST_1_PARAM) + fprintf (out, "1_PARAM,"); + if (p->type & CONST_SIZE) + fprintf (out, "SIZE,"); + if (p->type & CONST_DEFINED_BY) + fprintf (out, "DEF_BY,"); + if (p->type & CONST_GENERALIZED) + fprintf (out, "GENERALIZED,"); + if (p->type & CONST_UTC) + fprintf (out, "UTC,"); + if (p->type & CONST_SET) + fprintf (out, "SET,"); + if (p->type & CONST_NOT_USED) + fprintf (out, "NOT_USED,"); + if (p->type & CONST_ASSIGN) + fprintf (out, "ASSIGNMENT,"); + } + } + + if (mode == ASN1_PRINT_ALL) + { + fprintf (out, "\n"); + } + else + { + switch (type_field (p->type)) + { + case ASN1_ETYPE_CONSTANT: + case ASN1_ETYPE_TAG: + case ASN1_ETYPE_SIZE: + break; + default: + fprintf (out, "\n"); + } + } + + if (p->down) + { + p = p->down; + indent += 2; + } + else if (p == root) + { + p = NULL; + break; + } + else if (p->right) + p = p->right; + else + { + while (1) + { + p = _asn1_find_up (p); + if (p == root) + { + p = NULL; + break; + } + indent -= 2; + if (p->right) + { + p = p->right; + break; + } + } + } + } +} + + + +/** + * asn1_number_of_elements: + * @element: pointer to the root of an ASN1 structure. + * @name: the name of a sub-structure of ROOT. + * @num: pointer to an integer where the result will be stored + * + * Counts the number of elements of a sub-structure called NAME with + * names equal to "?1","?2", ... + * + * Returns: %ASN1_SUCCESS if successful, %ASN1_ELEMENT_NOT_FOUND if + * @name is not known, %ASN1_GENERIC_ERROR if pointer @num is %NULL. + **/ +int +asn1_number_of_elements (asn1_node_const element, const char *name, int *num) +{ + asn1_node_const node, p; + + if (num == NULL) + return ASN1_GENERIC_ERROR; + + *num = 0; + + node = asn1_find_node (element, name); + if (node == NULL) + return ASN1_ELEMENT_NOT_FOUND; + + p = node->down; + + while (p) + { + if (p->name[0] == '?') + (*num)++; + p = p->right; + } + + return ASN1_SUCCESS; +} + + +/** + * asn1_find_structure_from_oid: + * @definitions: ASN1 definitions + * @oidValue: value of the OID to search (e.g. "1.2.3.4"). + * + * Search the structure that is defined just after an OID definition. + * + * Returns: %NULL when @oidValue not found, otherwise the pointer to a + * constant string that contains the element name defined just after + * the OID. + **/ +const char * +asn1_find_structure_from_oid (asn1_node_const definitions, + const char *oidValue) +{ + char name[2 * ASN1_MAX_NAME_SIZE + 2]; + char value[ASN1_MAX_NAME_SIZE]; + asn1_node p; + int len; + int result; + const char *definitionsName; + + if ((definitions == NULL) || (oidValue == NULL)) + return NULL; /* ASN1_ELEMENT_NOT_FOUND; */ + + definitionsName = definitions->name; + + /* search the OBJECT_ID into definitions */ + p = definitions->down; + while (p) + { + if ((type_field (p->type) == ASN1_ETYPE_OBJECT_ID) && + (p->type & CONST_ASSIGN)) + { + snprintf (name, sizeof (name), "%s.%s", definitionsName, p->name); + + len = ASN1_MAX_NAME_SIZE; + result = asn1_read_value (definitions, name, value, &len); + + if ((result == ASN1_SUCCESS) && (!strcmp (oidValue, value))) + { + p = p->right; + if (p == NULL) /* reach the end of ASN1 definitions */ + return NULL; /* ASN1_ELEMENT_NOT_FOUND; */ + + return p->name; + } + } + p = p->right; + } + + return NULL; /* ASN1_ELEMENT_NOT_FOUND; */ +} + +/** + * asn1_copy_node: + * @dst: Destination asn1 node. + * @dst_name: Field name in destination node. + * @src: Source asn1 node. + * @src_name: Field name in source node. + * + * Create a deep copy of a asn1_node variable. That + * function requires @dst to be expanded using asn1_create_element(). + * + * Returns: Return %ASN1_SUCCESS on success. + **/ +int +asn1_copy_node (asn1_node dst, const char *dst_name, + asn1_node_const src, const char *src_name) +{ + int result; + asn1_node dst_node; + void *data = NULL; + int size = 0; + + result = asn1_der_coding (src, src_name, NULL, &size, NULL); + if (result != ASN1_MEM_ERROR) + return result; + + data = malloc (size); + if (data == NULL) + return ASN1_MEM_ERROR; + + result = asn1_der_coding (src, src_name, data, &size, NULL); + if (result != ASN1_SUCCESS) + { + free (data); + return result; + } + + dst_node = asn1_find_node (dst, dst_name); + if (dst_node == NULL) + { + free (data); + return ASN1_ELEMENT_NOT_FOUND; + } + + result = asn1_der_decoding (&dst_node, data, size, NULL); + + free (data); + + return result; +} + +/** + * asn1_dup_node: + * @src: Source asn1 node. + * @src_name: Field name in source node. + * + * Create a deep copy of a asn1_node variable. This function + * will return an exact copy of the provided structure. + * + * Returns: Return %NULL on failure. + **/ +asn1_node +asn1_dup_node (asn1_node_const src, const char *src_name) +{ + return _asn1_copy_structure2 (src, src_name); +} diff --git a/grub-core/lib/libtasn1/lib/structure.h b/grub-core/lib/libtasn1/lib/structure.h new file mode 100644 index 000000000..da70ae53f --- /dev/null +++ b/grub-core/lib/libtasn1/lib/structure.h @@ -0,0 +1,46 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * The LIBTASN1 library is free software; you can redistribute it + * and/or modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + */ + +/*************************************************/ +/* File: structure.h */ +/* Description: list of exported object by */ +/* "structure.c" */ +/*************************************************/ + +#ifndef _STRUCTURE_H +# define _STRUCTURE_H + +# include "parser_aux.h" // list_type + +int _asn1_create_static_structure (asn1_node_const pointer, + char *output_file_name, char *vector_name); + +asn1_node _asn1_copy_structure3 (asn1_node_const source_node); + +asn1_node _asn1_add_single_node (unsigned int type); + +asn1_node _asn1_find_left (asn1_node_const node); + +int +_asn1_delete_structure (list_type * e_list, asn1_node * structure, + unsigned int flags); + +#endif diff --git a/include/grub/libtasn1.h b/include/grub/libtasn1.h new file mode 100644 index 000000000..fc695a28a --- /dev/null +++ b/include/grub/libtasn1.h @@ -0,0 +1,639 @@ +/* + * Copyright (C) 2002-2021 Free Software Foundation, Inc. + * + * This file is part of LIBTASN1. + * + * LIBTASN1 is free software; you can redistribute it and/or modify it + * under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation; either version 2.1 of + * the License, or (at your option) any later version. + * + * LIBTASN1 is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with LIBTASN1; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA + * + */ + +/** + * SECTION:libtasn1 + * @short_description: GNU ASN.1 library + * + * The Libtasn1 library provides Abstract Syntax Notation One (ASN.1, as + * specified by the X.680 ITU-T recommendation) parsing and structures + * management, and Distinguished Encoding Rules (DER, as per X.690) + * encoding and decoding functions. + */ + + +#ifndef LIBTASN1_H +# define LIBTASN1_H + +# ifndef ASN1_API +# if defined ASN1_BUILDING && defined HAVE_VISIBILITY && HAVE_VISIBILITY +# define ASN1_API __attribute__((__visibility__("default"))) +# elif defined ASN1_BUILDING && defined _MSC_VER && ! defined ASN1_STATIC +# define ASN1_API __declspec(dllexport) +# elif defined _MSC_VER && ! defined ASN1_STATIC +# define ASN1_API __declspec(dllimport) +# else +# define ASN1_API +# endif +# endif + +# ifdef __GNUC__ +# define __LIBTASN1_CONST__ __attribute__((const)) +# define __LIBTASN1_PURE__ __attribute__((pure)) +# else +# define __LIBTASN1_CONST__ +# define __LIBTASN1_PURE__ +# endif + +# include <sys/types.h> +# include <time.h> +# include <stdio.h> /* for FILE* */ + +# ifdef __cplusplus +extern "C" +{ +# endif + +/** + * ASN1_VERSION: + * + * Version of the library as a string. + */ +# define ASN1_VERSION "4.18.0" + +/** + * ASN1_VERSION_MAJOR: + * + * Major version number of the library. + */ +# define ASN1_VERSION_MAJOR 4 + +/** + * ASN1_VERSION_MINOR: + * + * Minor version number of the library. + */ +# define ASN1_VERSION_MINOR 18 + +/** + * ASN1_VERSION_PATCH: + * + * Patch version number of the library. + */ +# define ASN1_VERSION_PATCH 0 + +/** + * ASN1_VERSION_NUMBER: + * + * Version number of the library as a number. + */ +# define ASN1_VERSION_NUMBER 0x041200 + + +# if defined __GNUC__ && !defined ASN1_INTERNAL_BUILD +# define _ASN1_GCC_VERSION (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) +# if _ASN1_GCC_VERSION >= 30100 +# define _ASN1_GCC_ATTR_DEPRECATED __attribute__ ((__deprecated__)) +# endif +# endif + +# ifndef _ASN1_GCC_ATTR_DEPRECATED +# define _ASN1_GCC_ATTR_DEPRECATED +# endif + +/*****************************************/ +/* Errors returned by libtasn1 functions */ +/*****************************************/ +# define ASN1_SUCCESS 0 +# define ASN1_FILE_NOT_FOUND 1 +# define ASN1_ELEMENT_NOT_FOUND 2 +# define ASN1_IDENTIFIER_NOT_FOUND 3 +# define ASN1_DER_ERROR 4 +# define ASN1_VALUE_NOT_FOUND 5 +# define ASN1_GENERIC_ERROR 6 +# define ASN1_VALUE_NOT_VALID 7 +# define ASN1_TAG_ERROR 8 +# define ASN1_TAG_IMPLICIT 9 +# define ASN1_ERROR_TYPE_ANY 10 +# define ASN1_SYNTAX_ERROR 11 +# define ASN1_MEM_ERROR 12 +# define ASN1_MEM_ALLOC_ERROR 13 +# define ASN1_DER_OVERFLOW 14 +# define ASN1_NAME_TOO_LONG 15 +# define ASN1_ARRAY_ERROR 16 +# define ASN1_ELEMENT_NOT_EMPTY 17 +# define ASN1_TIME_ENCODING_ERROR 18 +# define ASN1_RECURSION 19 + +/*************************************/ +/* Constants used in asn1_visit_tree */ +/*************************************/ +# define ASN1_PRINT_NAME 1 +# define ASN1_PRINT_NAME_TYPE 2 +# define ASN1_PRINT_NAME_TYPE_VALUE 3 +# define ASN1_PRINT_ALL 4 + +/*****************************************/ +/* Constants returned by asn1_read_tag */ +/*****************************************/ +# define ASN1_CLASS_UNIVERSAL 0x00 /* old: 1 */ +# define ASN1_CLASS_APPLICATION 0x40 /* old: 2 */ +# define ASN1_CLASS_CONTEXT_SPECIFIC 0x80 /* old: 3 */ +# define ASN1_CLASS_PRIVATE 0xC0 /* old: 4 */ +# define ASN1_CLASS_STRUCTURED 0x20 + +/*****************************************/ +/* Constants returned by asn1_read_tag */ +/*****************************************/ +# define ASN1_TAG_BOOLEAN 0x01 +# define ASN1_TAG_INTEGER 0x02 +# define ASN1_TAG_SEQUENCE 0x10 +# define ASN1_TAG_SET 0x11 +# define ASN1_TAG_OCTET_STRING 0x04 +# define ASN1_TAG_BIT_STRING 0x03 +# define ASN1_TAG_UTCTime 0x17 +# define ASN1_TAG_GENERALIZEDTime 0x18 +# define ASN1_TAG_OBJECT_ID 0x06 +# define ASN1_TAG_ENUMERATED 0x0A +# define ASN1_TAG_NULL 0x05 +# define ASN1_TAG_GENERALSTRING 0x1B +# define ASN1_TAG_NUMERIC_STRING 0x12 +# define ASN1_TAG_IA5_STRING 0x16 +# define ASN1_TAG_TELETEX_STRING 0x14 +# define ASN1_TAG_PRINTABLE_STRING 0x13 +# define ASN1_TAG_UNIVERSAL_STRING 0x1C +# define ASN1_TAG_BMP_STRING 0x1E +# define ASN1_TAG_UTF8_STRING 0x0C +# define ASN1_TAG_VISIBLE_STRING 0x1A + +/** + * asn1_node: + * + * Structure definition used for the node of the tree + * that represents an ASN.1 DEFINITION. + */ + typedef struct asn1_node_st asn1_node_st; + + typedef asn1_node_st *asn1_node; + typedef const asn1_node_st *asn1_node_const; + +/** + * ASN1_MAX_NAME_SIZE: + * + * Maximum number of characters of a name + * inside a file with ASN1 definitions. + */ +# define ASN1_MAX_NAME_SIZE 64 + + +/** + * asn1_static_node: + * @name: Node name + * @type: Node typ + * @value: Node value + * + * For the on-disk format of ASN.1 trees, created by asn1_parser2array(). + */ + typedef struct asn1_static_node_st + { + const char *name; /* Node name */ + unsigned int type; /* Node type */ + const void *value; /* Node value */ + } asn1_static_node; + +/* List of constants for field type of asn1_static_node */ +# define ASN1_ETYPE_INVALID 0 +# define ASN1_ETYPE_CONSTANT 1 +# define ASN1_ETYPE_IDENTIFIER 2 +# define ASN1_ETYPE_INTEGER 3 +# define ASN1_ETYPE_BOOLEAN 4 +# define ASN1_ETYPE_SEQUENCE 5 +# define ASN1_ETYPE_BIT_STRING 6 +# define ASN1_ETYPE_OCTET_STRING 7 +# define ASN1_ETYPE_TAG 8 +# define ASN1_ETYPE_DEFAULT 9 +# define ASN1_ETYPE_SIZE 10 +# define ASN1_ETYPE_SEQUENCE_OF 11 +# define ASN1_ETYPE_OBJECT_ID 12 +# define ASN1_ETYPE_ANY 13 +# define ASN1_ETYPE_SET 14 +# define ASN1_ETYPE_SET_OF 15 +# define ASN1_ETYPE_DEFINITIONS 16 +# define ASN1_ETYPE_CHOICE 18 +# define ASN1_ETYPE_IMPORTS 19 +# define ASN1_ETYPE_NULL 20 +# define ASN1_ETYPE_ENUMERATED 21 +# define ASN1_ETYPE_GENERALSTRING 27 +# define ASN1_ETYPE_NUMERIC_STRING 28 +# define ASN1_ETYPE_IA5_STRING 29 +# define ASN1_ETYPE_TELETEX_STRING 30 +# define ASN1_ETYPE_PRINTABLE_STRING 31 +# define ASN1_ETYPE_UNIVERSAL_STRING 32 +# define ASN1_ETYPE_BMP_STRING 33 +# define ASN1_ETYPE_UTF8_STRING 34 +# define ASN1_ETYPE_VISIBLE_STRING 35 +# define ASN1_ETYPE_UTC_TIME 36 +# define ASN1_ETYPE_GENERALIZED_TIME 37 + +/** + * ASN1_DELETE_FLAG_ZEROIZE: + * + * Used by: asn1_delete_structure2() + * + * Zeroize values prior to deinitialization. + */ +# define ASN1_DELETE_FLAG_ZEROIZE 1 + +/** + * ASN1_DECODE_FLAG_ALLOW_PADDING: + * + * Used by: asn1_der_decoding2() + * + * This flag would allow arbitrary data past the DER data. + */ +# define ASN1_DECODE_FLAG_ALLOW_PADDING 1 +/** + * ASN1_DECODE_FLAG_STRICT_DER: + * + * Used by: asn1_der_decoding2() + * + * This flag would ensure that no BER decoding takes place. + */ +# define ASN1_DECODE_FLAG_STRICT_DER (1<<1) +/** + * ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME: + * + * Used by: asn1_der_decoding2() + * + * This flag will tolerate Time encoding errors when in strict DER. + */ +# define ASN1_DECODE_FLAG_ALLOW_INCORRECT_TIME (1<<2) + + +/** + * asn1_data_node_st: + * @name: Node name + * @value: Node value + * @value_len: Node value size + * @type: Node value type (ASN1_ETYPE_*) + * + * Data node inside a #asn1_node structure. + */ + struct asn1_data_node_st + { + const char *name; /* Node name */ + const void *value; /* Node value */ + unsigned int value_len; /* Node value size */ + unsigned int type; /* Node value type (ASN1_ETYPE_*) */ + }; + typedef struct asn1_data_node_st asn1_data_node_st; + +/***********************************/ +/* Fixed constants */ +/***********************************/ + +/** + * ASN1_MAX_ERROR_DESCRIPTION_SIZE: + * + * Maximum number of characters + * of a description message + * (null character included). + */ +# define ASN1_MAX_ERROR_DESCRIPTION_SIZE 128 + +/***********************************/ +/* Functions definitions */ +/***********************************/ + + extern ASN1_API int + asn1_parser2tree (const char *file, + asn1_node * definitions, char *error_desc); + + extern ASN1_API int + asn1_parser2array (const char *inputFileName, + const char *outputFileName, + const char *vectorName, char *error_desc); + + extern ASN1_API int + asn1_array2tree (const asn1_static_node * array, + asn1_node * definitions, char *errorDescription); + + extern ASN1_API void + asn1_print_structure (FILE * out, asn1_node_const structure, + const char *name, int mode); + + extern ASN1_API int + asn1_create_element (asn1_node_const definitions, + const char *source_name, asn1_node * element); + + extern ASN1_API int asn1_delete_structure (asn1_node * structure); + + extern ASN1_API int asn1_delete_structure2 (asn1_node * structure, + unsigned int flags); + + extern ASN1_API int + asn1_delete_element (asn1_node structure, const char *element_name); + + extern ASN1_API int + asn1_write_value (asn1_node node_root, const char *name, + const void *ivalue, int len); + + extern ASN1_API int + asn1_read_value (asn1_node_const root, const char *name, + void *ivalue, int *len); + + extern ASN1_API int + asn1_read_value_type (asn1_node_const root, const char *name, + void *ivalue, int *len, unsigned int *etype); + + extern ASN1_API int + asn1_read_node_value (asn1_node_const node, asn1_data_node_st * data); + + extern ASN1_API int + asn1_number_of_elements (asn1_node_const element, const char *name, + int *num); + + extern ASN1_API int + asn1_der_coding (asn1_node_const element, const char *name, + void *ider, int *len, char *ErrorDescription); + + extern ASN1_API int + asn1_der_decoding2 (asn1_node * element, const void *ider, + int *max_ider_len, unsigned int flags, + char *errorDescription); + + extern ASN1_API int + asn1_der_decoding (asn1_node * element, const void *ider, + int ider_len, char *errorDescription); + +/* Do not use. Use asn1_der_decoding() instead. */ + extern ASN1_API int + asn1_der_decoding_element (asn1_node * structure, + const char *elementName, + const void *ider, int len, + char *errorDescription) + _ASN1_GCC_ATTR_DEPRECATED; + + extern ASN1_API int + asn1_der_decoding_startEnd (asn1_node element, + const void *ider, int ider_len, + const char *name_element, + int *start, int *end); + + extern ASN1_API int + asn1_expand_any_defined_by (asn1_node_const definitions, + asn1_node * element); + + extern ASN1_API int + asn1_expand_octet_string (asn1_node_const definitions, + asn1_node * element, + const char *octetName, const char *objectName); + + extern ASN1_API int + asn1_read_tag (asn1_node_const root, const char *name, + int *tagValue, int *classValue); + + extern ASN1_API const char *asn1_find_structure_from_oid (asn1_node_const + definitions, + const char + *oidValue); + + __LIBTASN1_PURE__ + extern ASN1_API const char *asn1_check_version (const char *req_version); + + __LIBTASN1_PURE__ extern ASN1_API const char *asn1_strerror (int error); + + extern ASN1_API void asn1_perror (int error); + +# define ASN1_MAX_TAG_SIZE 4 +# define ASN1_MAX_LENGTH_SIZE 9 +# define ASN1_MAX_TL_SIZE (ASN1_MAX_TAG_SIZE+ASN1_MAX_LENGTH_SIZE) + extern ASN1_API long + asn1_get_length_der (const unsigned char *der, int der_len, int *len); + + extern ASN1_API long + asn1_get_length_ber (const unsigned char *ber, int ber_len, int *len); + + extern ASN1_API void + asn1_length_der (unsigned long int len, unsigned char *der, int *der_len); + +/* Other utility functions. */ + + extern ASN1_API + int asn1_decode_simple_der (unsigned int etype, const unsigned char *der, + unsigned int _der_len, + const unsigned char **str, + unsigned int *str_len); + + extern ASN1_API + int asn1_decode_simple_ber (unsigned int etype, const unsigned char *der, + unsigned int _der_len, + unsigned char **str, + unsigned int *str_len, unsigned int *ber_len); + + extern ASN1_API int + asn1_encode_simple_der (unsigned int etype, const unsigned char *str, + unsigned int str_len, unsigned char *tl, + unsigned int *tl_len); + + extern ASN1_API asn1_node + asn1_find_node (asn1_node_const pointer, const char *name); + + extern ASN1_API int + asn1_copy_node (asn1_node dst, const char *dst_name, + asn1_node_const src, const char *src_name); + extern ASN1_API asn1_node + asn1_dup_node (asn1_node_const src, const char *src_name); + +/* Internal and low-level DER utility functions. */ + + extern ASN1_API int + asn1_get_tag_der (const unsigned char *der, int der_len, + unsigned char *cls, int *len, unsigned long *tag); + + extern ASN1_API void + asn1_octet_der (const unsigned char *str, int str_len, + unsigned char *der, int *der_len); + + extern ASN1_API int + asn1_get_octet_der (const unsigned char *der, int der_len, + int *ret_len, unsigned char *str, + int str_size, int *str_len); + + extern ASN1_API void asn1_bit_der (const unsigned char *str, int bit_len, + unsigned char *der, int *der_len); + + extern ASN1_API int + asn1_get_bit_der (const unsigned char *der, int der_len, + int *ret_len, unsigned char *str, + int str_size, int *bit_len); + + extern ASN1_API int + asn1_get_object_id_der (const unsigned char *der, + int der_len, int *ret_len, + char *str, int str_size); + + extern ASN1_API int + asn1_object_id_der (const char *str, unsigned char *der, int *der_len, + unsigned flags); + +/* Compatibility types */ + +/** + * asn1_retCode: + * + * Type formerly returned by libtasn1 functions. + * + * Deprecated: 3.0: Use int instead. + */ + typedef int asn1_retCode _ASN1_GCC_ATTR_DEPRECATED; + +/** + * node_asn_struct: + * + * Compat #define. + * + * Deprecated: 3.0: Use #asn1_node instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define node_asn_struct _Pragma ("GCC warning \"'node_asn_struct' macro is deprecated, use 'asn1_node' instead.\"") asn1_node_st +# else +# define node_asn_struct asn1_node_st +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +/** + * node_asn: + * + * Compat #define. + * + * Deprecated: 3.0: Use #asn1_node instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define node_asn _Pragma ("GCC warning \"'node_asn' macro is deprecated, use 'asn1_node' instead.\"") asn1_node_st +# else +# define node_asn asn1_node_st +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +/** + * ASN1_TYPE: + * + * Compat #define. + * + * Deprecated: 3.0: Use #asn1_node instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define ASN1_TYPE _Pragma ("GCC warning \"'ASN1_TYPE' macro is deprecated, use 'asn1_node' instead.\"") asn1_node +# else +# define ASN1_TYPE asn1_node +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +/** + * ASN1_TYPE_EMPTY: + * + * Compat #define. + * + * Deprecated: 3.0: Use NULL instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define ASN1_TYPE_EMPTY _Pragma ("GCC warning \"'ASN1_TYPE_EMPTY' macro is deprecated, use 'NULL' instead.\"") NULL +# else +# define ASN1_TYPE_EMPTY NULL +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +/** + * static_struct_asn: + * + * Compat #define. + * + * Deprecated: 3.0: Use #asn1_static_node instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define static_struct_asn _Pragma ("GCC warning \"'static_struct_asn' macro is deprecated, use 'asn1_static_node_st' instead.\"") asn1_static_node_st +# else +# define static_struct_asn asn1_static_node_st +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +/** + * ASN1_ARRAY_TYPE: + * + * Compat #define. + * + * Deprecated: 3.0: Use #asn1_static_node instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define ASN1_ARRAY_TYPE _Pragma ("GCC warning \"'ASN1_ARRAY_TYPE' macro is deprecated, use 'asn1_static_node' instead.\"") asn1_static_node +# else +# define ASN1_ARRAY_TYPE asn1_static_node +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +/** + * asn1_static_node_t: + * + * Compat #define. + * + * Deprecated: 3.0: Use #asn1_static_node instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define asn1_static_node_t _Pragma ("GCC warning \"'asn1_static_node_t' macro is deprecated, use 'asn1_static_node' instead.\"") asn1_static_node +# else +# define asn1_static_node_t asn1_static_node +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +/** + * node_data_struct: + * + * Compat #define. + * + * Deprecated: 3.0: Use #asn1_data_node_st instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define node_data_struct _Pragma ("GCC warning \"'node_data_struct' macro is deprecated, use 'asn1_data_node_st' instead.\"") asn1_data_node_st +# else +# define node_data_struct asn1_data_node_st +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +/** + * ASN1_DATA_NODE: + * + * Compat #define. + * + * Deprecated: 3.0: Use #asn1_data_node_st instead. + */ +# ifndef ASN1_DISABLE_DEPRECATED +# if _ASN1_GCC_VERSION >= 30100 +# define ASN1_DATA_NODE _Pragma ("GCC warning \"'asn1_static_node_t' macro is deprecated, use 'asn1_static_node' instead.\"") asn1_data_node_st +# else +# define ASN1_DATA_NODE asn1_data_node_st +# endif +# endif /* !ASN1_DISABLE_DEPRECATED */ + +# ifdef __cplusplus +} +# endif + +#endif /* LIBTASN1_H */ -- 2.31.1
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