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frr.30538
0006-isisd-fix-10505-using-base64-encoding.patch
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File 0006-isisd-fix-10505-using-base64-encoding.patch of Package frr.30538
From ac3133450de12ba86c051265fc0f1b12bc57b40c Mon Sep 17 00:00:00 2001 From: whichbug <whichbug@github.com> Date: Thu, 10 Feb 2022 22:49:41 -0500 Upstream: yes References: bsc#1196506,CVE-2022-26126 Subject: [PATCH] isisd: fix #10505 using base64 encoding Backport of the patch to frr-7.4 by Marius Tomaschewski <mt@suse.com> Using base64 instead of the raw string to encode the binary data. Signed-off-by: whichbug <whichbug@github.com> diff --git a/isisd/isis_nb.h b/isisd/isis_nb.h index 58f6c3892..c2f727154 100644 --- a/isisd/isis_nb.h +++ b/isisd/isis_nb.h @@ -419,29 +419,33 @@ void isis_notif_lsp_exceed_max(const struct isis_area *area, const char *lsp_id); void isis_notif_max_area_addr_mismatch(const struct isis_circuit *circuit, uint8_t max_area_addrs, - const char *raw_pdu); + const char *raw_pdu, size_t raw_pdu_len); void isis_notif_authentication_type_failure(const struct isis_circuit *circuit, - const char *raw_pdu); + const char *raw_pdu, size_t raw_pdu_len); void isis_notif_authentication_failure(const struct isis_circuit *circuit, - const char *raw_pdu); + const char *raw_pdu, size_t raw_pdu_len); void isis_notif_adj_state_change(const struct isis_adjacency *adj, int new_state, const char *reason); void isis_notif_reject_adjacency(const struct isis_circuit *circuit, - const char *reason, const char *raw_pdu); + const char *reason, const char *raw_pdu, + size_t raw_pdu_len); void isis_notif_area_mismatch(const struct isis_circuit *circuit, - const char *raw_pdu); + const char *raw_pdu, size_t raw_pdu_len); void isis_notif_lsp_received(const struct isis_circuit *circuit, const char *lsp_id, uint32_t seqno, uint32_t timestamp, const char *sys_id); void isis_notif_lsp_gen(const struct isis_area *area, const char *lsp_id, uint32_t seqno, uint32_t timestamp); void isis_notif_id_len_mismatch(const struct isis_circuit *circuit, - uint8_t rcv_id_len, const char *raw_pdu); + uint8_t rcv_id_len, const char *raw_pdu, + size_t raw_pdu_len); void isis_notif_version_skew(const struct isis_circuit *circuit, - uint8_t version, const char *raw_pdu); + uint8_t version, const char *raw_pdu, + size_t raw_pdu_len); void isis_notif_lsp_error(const struct isis_circuit *circuit, const char *lsp_id, const char *raw_pdu, - uint32_t offset, uint8_t tlv_type); + size_t raw_pdu_len, uint32_t offset, + uint8_t tlv_type); void isis_notif_seqno_skipped(const struct isis_circuit *circuit, const char *lsp_id); void isis_notif_own_lsp_purge(const struct isis_circuit *circuit, diff --git a/isisd/isis_nb_notifications.c b/isisd/isis_nb_notifications.c index ea33ec10e..4b320950b 100644 --- a/isisd/isis_nb_notifications.c +++ b/isisd/isis_nb_notifications.c @@ -173,7 +173,7 @@ void isis_notif_lsp_exceed_max(const struct isis_area *area, const char *lsp_id) */ void isis_notif_max_area_addr_mismatch(const struct isis_circuit *circuit, uint8_t max_area_addrs, - const char *raw_pdu) + const char *raw_pdu, size_t raw_pdu_len) { const char *xpath = "/frr-isisd:max-area-addresses-mismatch"; struct list *arguments = yang_data_list_new(); @@ -187,7 +187,7 @@ void isis_notif_max_area_addr_mismatch(const struct isis_circuit *circuit, data = yang_data_new_uint8(xpath_arg, max_area_addrs); listnode_add(arguments, data); snprintf(xpath_arg, sizeof(xpath_arg), "%s/raw-pdu", xpath); - data = yang_data_new(xpath_arg, raw_pdu); + data = yang_data_new_binary(xpath_arg, raw_pdu, raw_pdu_len); listnode_add(arguments, data); nb_notification_send(xpath, arguments); @@ -197,7 +197,7 @@ void isis_notif_max_area_addr_mismatch(const struct isis_circuit *circuit, * XPath: /frr-isisd:authentication-type-failure */ void isis_notif_authentication_type_failure(const struct isis_circuit *circuit, - const char *raw_pdu) + const char *raw_pdu, size_t raw_pdu_len) { const char *xpath = "/frr-isisd:authentication-type-failure"; struct list *arguments = yang_data_list_new(); @@ -208,7 +208,7 @@ void isis_notif_authentication_type_failure(const struct isis_circuit *circuit, notif_prep_instance_hdr(xpath, area, "default", arguments); notif_prepr_iface_hdr(xpath, circuit, arguments); snprintf(xpath_arg, sizeof(xpath_arg), "%s/raw-pdu", xpath); - data = yang_data_new(xpath_arg, raw_pdu); + data = yang_data_new_binary(xpath_arg, raw_pdu, raw_pdu_len); listnode_add(arguments, data); nb_notification_send(xpath, arguments); @@ -218,7 +218,7 @@ void isis_notif_authentication_type_failure(const struct isis_circuit *circuit, * XPath: /frr-isisd:authentication-failure */ void isis_notif_authentication_failure(const struct isis_circuit *circuit, - const char *raw_pdu) + const char *raw_pdu, size_t raw_pdu_len) { const char *xpath = "/frr-isisd:authentication-failure"; struct list *arguments = yang_data_list_new(); @@ -229,7 +229,7 @@ void isis_notif_authentication_failure(const struct isis_circuit *circuit, notif_prep_instance_hdr(xpath, area, "default", arguments); notif_prepr_iface_hdr(xpath, circuit, arguments); snprintf(xpath_arg, sizeof(xpath_arg), "%s/raw-pdu", xpath); - data = yang_data_new(xpath_arg, raw_pdu); + data = yang_data_new_binary(xpath_arg, raw_pdu, raw_pdu_len); listnode_add(arguments, data); nb_notification_send(xpath, arguments); @@ -276,7 +276,8 @@ void isis_notif_adj_state_change(const struct isis_adjacency *adj, * XPath: /frr-isisd:rejected-adjacency */ void isis_notif_reject_adjacency(const struct isis_circuit *circuit, - const char *reason, const char *raw_pdu) + const char *reason, const char *raw_pdu, + size_t raw_pdu_len) { const char *xpath = "/frr-isisd:rejected-adjacency"; struct list *arguments = yang_data_list_new(); @@ -290,7 +291,7 @@ void isis_notif_reject_adjacency(const struct isis_circuit *circuit, data = yang_data_new_string(xpath_arg, reason); listnode_add(arguments, data); snprintf(xpath_arg, sizeof(xpath_arg), "%s/raw-pdu", xpath); - data = yang_data_new(xpath_arg, raw_pdu); + data = yang_data_new_binary(xpath_arg, raw_pdu, raw_pdu_len); listnode_add(arguments, data); nb_notification_send(xpath, arguments); @@ -300,7 +301,7 @@ void isis_notif_reject_adjacency(const struct isis_circuit *circuit, * XPath: /frr-isisd:area-mismatch */ void isis_notif_area_mismatch(const struct isis_circuit *circuit, - const char *raw_pdu) + const char *raw_pdu, size_t raw_pdu_len) { const char *xpath = "/frr-isisd:area-mismatch"; struct list *arguments = yang_data_list_new(); @@ -311,7 +312,7 @@ void isis_notif_area_mismatch(const struct isis_circuit *circuit, notif_prep_instance_hdr(xpath, area, "default", arguments); notif_prepr_iface_hdr(xpath, circuit, arguments); snprintf(xpath_arg, sizeof(xpath_arg), "%s/raw-pdu", xpath); - data = yang_data_new(xpath_arg, raw_pdu); + data = yang_data_new_binary(xpath_arg, raw_pdu, raw_pdu_len); listnode_add(arguments, data); nb_notification_send(xpath, arguments); @@ -377,7 +378,8 @@ void isis_notif_lsp_gen(const struct isis_area *area, const char *lsp_id, * XPath: /frr-isisd:id-len-mismatch */ void isis_notif_id_len_mismatch(const struct isis_circuit *circuit, - uint8_t rcv_id_len, const char *raw_pdu) + uint8_t rcv_id_len, const char *raw_pdu, + size_t raw_pdu_len) { const char *xpath = "/frr-isisd:id-len-mismatch"; struct list *arguments = yang_data_list_new(); @@ -391,7 +393,7 @@ void isis_notif_id_len_mismatch(const struct isis_circuit *circuit, data = yang_data_new_uint8(xpath_arg, rcv_id_len); listnode_add(arguments, data); snprintf(xpath_arg, sizeof(xpath_arg), "%s/raw-pdu", xpath); - data = yang_data_new(xpath_arg, raw_pdu); + data = yang_data_new_binary(xpath_arg, raw_pdu, raw_pdu_len); listnode_add(arguments, data); nb_notification_send(xpath, arguments); @@ -401,7 +403,8 @@ void isis_notif_id_len_mismatch(const struct isis_circuit *circuit, * XPath: /frr-isisd:version-skew */ void isis_notif_version_skew(const struct isis_circuit *circuit, - uint8_t version, const char *raw_pdu) + uint8_t version, const char *raw_pdu, + size_t raw_pdu_len) { const char *xpath = "/frr-isisd:version-skew"; struct list *arguments = yang_data_list_new(); @@ -415,7 +418,7 @@ void isis_notif_version_skew(const struct isis_circuit *circuit, data = yang_data_new_uint8(xpath_arg, version); listnode_add(arguments, data); snprintf(xpath_arg, sizeof(xpath_arg), "%s/raw-pdu", xpath); - data = yang_data_new(xpath_arg, raw_pdu); + data = yang_data_new_binary(xpath_arg, raw_pdu, raw_pdu_len); listnode_add(arguments, data); nb_notification_send(xpath, arguments); @@ -426,6 +429,7 @@ void isis_notif_version_skew(const struct isis_circuit *circuit, */ void isis_notif_lsp_error(const struct isis_circuit *circuit, const char *lsp_id, const char *raw_pdu, + size_t raw_pdu_len, __attribute__((unused)) uint32_t offset, __attribute__((unused)) uint8_t tlv_type) { @@ -441,7 +445,7 @@ void isis_notif_lsp_error(const struct isis_circuit *circuit, data = yang_data_new_string(xpath_arg, lsp_id); listnode_add(arguments, data); snprintf(xpath_arg, sizeof(xpath_arg), "%s/raw-pdu", xpath); - data = yang_data_new(xpath_arg, raw_pdu); + data = yang_data_new_binary(xpath_arg, raw_pdu, raw_pdu_len); listnode_add(arguments, data); /* ignore offset and tlv_type which cannot be set properly */ diff --git a/isisd/isis_pdu.c b/isisd/isis_pdu.c index e8a0ba02e..ebf8fd3a2 100644 --- a/isisd/isis_pdu.c +++ b/isisd/isis_pdu.c @@ -583,7 +583,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, #ifndef FABRICD isis_notif_reject_adjacency( circuit, "p2p hello on non p2p circuit", - raw_pdu); + raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_WARNING; } @@ -594,7 +594,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, #ifndef FABRICD isis_notif_reject_adjacency( circuit, "lan hello on non broadcast circuit", - raw_pdu); + raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_WARNING; } @@ -608,7 +608,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, isis_notif_reject_adjacency( circuit, "LAN Hello received over circuit with externalDomain = true", - raw_pdu); + raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_WARNING; } @@ -623,7 +623,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, circuit->rej_adjacencies++; #ifndef FABRICD isis_notif_reject_adjacency( - circuit, "Interface level mismatch", raw_pdu); + circuit, "Interface level mismatch", raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_WARNING; } @@ -653,7 +653,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, circuit->rej_adjacencies++; #ifndef FABRICD isis_notif_reject_adjacency(circuit, "Invalid PDU length", - raw_pdu); + raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_WARNING; } @@ -665,7 +665,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, circuit->rej_adjacencies++; #ifndef FABRICD isis_notif_reject_adjacency( - circuit, "LAN Hello with wrong IS-level", raw_pdu); + circuit, "LAN Hello with wrong IS-level", raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_ERROR; } @@ -679,7 +679,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, circuit->rej_adjacencies++; #ifndef FABRICD isis_notif_reject_adjacency(circuit, "Failed to unpack TLVs", - raw_pdu); + raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ goto out; } @@ -688,7 +688,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, zlog_warn("No Area addresses TLV in %s", pdu_name); #ifndef FABRICD /* send northbound notification */ - isis_notif_area_mismatch(circuit, raw_pdu); + isis_notif_area_mismatch(circuit, raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ goto out; } @@ -698,7 +698,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, circuit->rej_adjacencies++; #ifndef FABRICD isis_notif_reject_adjacency( - circuit, "No supported protocols TLV", raw_pdu); + circuit, "No supported protocols TLV", raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ goto out; } @@ -715,11 +715,11 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, pdu_end - pdu_start); if (auth_code == ISIS_AUTH_FAILURE) { circuit->auth_failures++; - isis_notif_authentication_failure(circuit, raw_pdu); + isis_notif_authentication_failure(circuit, raw_pdu, sizeof(raw_pdu)); } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ circuit->auth_type_failures++; isis_notif_authentication_type_failure(circuit, - raw_pdu); + raw_pdu, sizeof(raw_pdu)); } #endif /* ifndef FABRICD */ goto out; @@ -732,7 +732,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, circuit->rej_adjacencies++; #ifndef FABRICD isis_notif_reject_adjacency( - circuit, "Received IIH with our own sysid", raw_pdu); + circuit, "Received IIH with our own sysid", raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ goto out; } @@ -750,7 +750,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, } #ifndef FABRICD /* send northbound notification */ - isis_notif_area_mismatch(circuit, raw_pdu); + isis_notif_area_mismatch(circuit, raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ goto out; } @@ -771,7 +771,7 @@ static int process_hello(uint8_t pdu_type, struct isis_circuit *circuit, #ifndef FABRICD isis_notif_reject_adjacency( circuit, "Neither IPv4 not IPv6 considered usable", - raw_pdu); + raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ goto out; } @@ -934,7 +934,7 @@ static int process_lsp(uint8_t pdu_type, struct isis_circuit *circuit, * will send dummy values which are ignored in the callback */ isis_notif_lsp_error(circuit, rawlspid_print(hdr.lsp_id), - raw_pdu, 0, 0); + raw_pdu, sizeof(raw_pdu), 0, 0); #endif /* ifndef FABRICD */ goto out; } @@ -958,11 +958,11 @@ static int process_lsp(uint8_t pdu_type, struct isis_circuit *circuit, /* send northbound notification */ if (auth_code == ISIS_AUTH_FAILURE) { circuit->auth_failures++; - isis_notif_authentication_failure(circuit, raw_pdu); + isis_notif_authentication_failure(circuit, raw_pdu, sizeof(raw_pdu)); } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ circuit->auth_type_failures++; isis_notif_authentication_type_failure(circuit, - raw_pdu); + raw_pdu, sizeof(raw_pdu)); } #endif /* ifndef FABRICD */ goto out; @@ -1397,11 +1397,11 @@ static int process_snp(uint8_t pdu_type, struct isis_circuit *circuit, if (auth_code == ISIS_AUTH_FAILURE) { circuit->auth_failures++; isis_notif_authentication_failure(circuit, - raw_pdu); + raw_pdu, sizeof(raw_pdu)); } else { /* AUTH_TYPE_FAILURE or NO_VALIDATOR */ circuit->auth_type_failures++; isis_notif_authentication_type_failure(circuit, - raw_pdu); + raw_pdu, sizeof(raw_pdu)); } #endif /* ifndef FABRICD */ goto out; @@ -1627,7 +1627,7 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa) zlog_warn("Unsupported ISIS version %" PRIu8, version1); #ifndef FABRICD /* send northbound notification */ - isis_notif_version_skew(circuit, version1, raw_pdu); + isis_notif_version_skew(circuit, version1, raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_WARNING; } @@ -1641,7 +1641,7 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa) circuit->id_len_mismatches++; #ifndef FABRICD /* send northbound notification */ - isis_notif_id_len_mismatch(circuit, id_len, raw_pdu); + isis_notif_id_len_mismatch(circuit, id_len, raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_ERROR; } @@ -1671,7 +1671,7 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa) zlog_warn("Unsupported ISIS PDU version %" PRIu8, version2); #ifndef FABRICD /* send northbound notification */ - isis_notif_version_skew(circuit, version2, raw_pdu); + isis_notif_version_skew(circuit, version2, raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_WARNING; } @@ -1695,7 +1695,7 @@ int isis_handle_pdu(struct isis_circuit *circuit, uint8_t *ssnpa) #ifndef FABRICD /* send northbound notification */ isis_notif_max_area_addr_mismatch(circuit, max_area_addrs, - raw_pdu); + raw_pdu, sizeof(raw_pdu)); #endif /* ifndef FABRICD */ return ISIS_ERROR; } diff --git a/lib/base64.c b/lib/base64.c new file mode 100644 index 000000000..e3f238969 --- /dev/null +++ b/lib/base64.c @@ -0,0 +1,193 @@ +/* + * This is part of the libb64 project, and has been placed in the public domain. + * For details, see http://sourceforge.net/projects/libb64 + */ + +#include "base64.h" + +static const int CHARS_PER_LINE = 72; +static const char *ENCODING = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + +void base64_init_encodestate(struct base64_encodestate *state_in) +{ + state_in->step = step_A; + state_in->result = 0; + state_in->stepcount = 0; +} + +char base64_encode_value(char value_in) +{ + if (value_in > 63) + return '='; + return ENCODING[(int)value_in]; +} + +int base64_encode_block(const char *plaintext_in, int length_in, char *code_out, + struct base64_encodestate *state_in) +{ + const char *plainchar = plaintext_in; + const char *const plaintextend = plaintext_in + length_in; + char *codechar = code_out; + char result; + char fragment; + + result = state_in->result; + + switch (state_in->step) { + while (1) { + case step_A: + if (plainchar == plaintextend) { + state_in->result = result; + state_in->step = step_A; + return codechar - code_out; + } + fragment = *plainchar++; + result = (fragment & 0x0fc) >> 2; + *codechar++ = base64_encode_value(result); + result = (fragment & 0x003) << 4; + /* fall through */ + case step_B: + if (plainchar == plaintextend) { + state_in->result = result; + state_in->step = step_B; + return codechar - code_out; + } + fragment = *plainchar++; + result |= (fragment & 0x0f0) >> 4; + *codechar++ = base64_encode_value(result); + result = (fragment & 0x00f) << 2; + /* fall through */ + case step_C: + if (plainchar == plaintextend) { + state_in->result = result; + state_in->step = step_C; + return codechar - code_out; + } + fragment = *plainchar++; + result |= (fragment & 0x0c0) >> 6; + *codechar++ = base64_encode_value(result); + result = (fragment & 0x03f) >> 0; + *codechar++ = base64_encode_value(result); + + ++(state_in->stepcount); + if (state_in->stepcount == CHARS_PER_LINE/4) { + *codechar++ = '\n'; + state_in->stepcount = 0; + } + } + } + /* control should not reach here */ + return codechar - code_out; +} + +int base64_encode_blockend(char *code_out, struct base64_encodestate *state_in) +{ + char *codechar = code_out; + + switch (state_in->step) { + case step_B: + *codechar++ = base64_encode_value(state_in->result); + *codechar++ = '='; + *codechar++ = '='; + break; + case step_C: + *codechar++ = base64_encode_value(state_in->result); + *codechar++ = '='; + break; + case step_A: + break; + } + *codechar++ = '\n'; + + return codechar - code_out; +} + + +signed char base64_decode_value(signed char value_in) +{ + static const signed char decoding[] = { + 62, -1, -1, -1, 63, 52, 53, 54, + 55, 56, 57, 58, 59, 60, 61, -1, + -1, -1, -2, -1, -1, -1, 0, 1, + 2, 3, 4, 5, 6, 7, 8, 9, + 10, 11, 12, 13, 14, 15, 16, 17, + 18, 19, 20, 21, 22, 23, 24, 25, + -1, -1, -1, -1, -1, -1, 26, 27, + 28, 29, 30, 31, 32, 33, 34, 35, + 36, 37, 38, 39, 40, 41, 42, 43, + 44, 45, 46, 47, 48, 49, 50, 51 + }; + value_in -= 43; + if (value_in < 0 || value_in >= 80) + return -1; + return decoding[(int)value_in]; +} + +void base64_init_decodestate(struct base64_decodestate *state_in) +{ + state_in->step = step_a; + state_in->plainchar = 0; +} + +int base64_decode_block(const char *code_in, int length_in, char *plaintext_out, + struct base64_decodestate *state_in) +{ + const char *codec = code_in; + char *plainc = plaintext_out; + signed char fragmt; + + *plainc = state_in->plainchar; + + switch (state_in->step) { + while (1) { + case step_a: + do { + if (codec == code_in+length_in) { + state_in->step = step_a; + state_in->plainchar = *plainc; + return plainc - plaintext_out; + } + fragmt = base64_decode_value(*codec++); + } while (fragmt < 0); + *plainc = (fragmt & 0x03f) << 2; + /* fall through */ + case step_b: + do { + if (codec == code_in+length_in) { + state_in->step = step_b; + state_in->plainchar = *plainc; + return plainc - plaintext_out; + } + fragmt = base64_decode_value(*codec++); + } while (fragmt < 0); + *plainc++ |= (fragmt & 0x030) >> 4; + *plainc = (fragmt & 0x00f) << 4; + /* fall through */ + case step_c: + do { + if (codec == code_in+length_in) { + state_in->step = step_c; + state_in->plainchar = *plainc; + return plainc - plaintext_out; + } + fragmt = base64_decode_value(*codec++); + } while (fragmt < 0); + *plainc++ |= (fragmt & 0x03c) >> 2; + *plainc = (fragmt & 0x003) << 6; + /* fall through */ + case step_d: + do { + if (codec == code_in+length_in) { + state_in->step = step_d; + state_in->plainchar = *plainc; + return plainc - plaintext_out; + } + fragmt = base64_decode_value(*codec++); + } while (fragmt < 0); + *plainc++ |= (fragmt & 0x03f); + } + } + /* control should not reach here */ + return plainc - plaintext_out; +} diff --git a/lib/base64.h b/lib/base64.h new file mode 100644 index 000000000..3dc1559aa --- /dev/null +++ b/lib/base64.h @@ -0,0 +1,45 @@ +/* + * This is part of the libb64 project, and has been placed in the public domain. + * For details, see http://sourceforge.net/projects/libb64 + */ + +#ifndef _BASE64_H_ +#define _BASE64_H_ + +enum base64_encodestep { + step_A, step_B, step_C +}; + +struct base64_encodestate { + enum base64_encodestep step; + char result; + int stepcount; +}; + +void base64_init_encodestate(struct base64_encodestate *state_in); + +char base64_encode_value(char value_in); + +int base64_encode_block(const char *plaintext_in, int length_in, char *code_out, + struct base64_encodestate *state_in); + +int base64_encode_blockend(char *code_out, struct base64_encodestate *state_in); + + +enum base64_decodestep { + step_a, step_b, step_c, step_d +}; + +struct base64_decodestate { + enum base64_decodestep step; + char plainchar; +}; + +void base64_init_decodestate(struct base64_decodestate *state_in); + +signed char base64_decode_value(signed char value_in); + +int base64_decode_block(const char *code_in, int length_in, char *plaintext_out, + struct base64_decodestate *state_in); + +#endif /* _BASE64_H_ */ diff --git a/lib/subdir.am b/lib/subdir.am index b2f3e7c5d..44573964c 100644 --- a/lib/subdir.am +++ b/lib/subdir.am @@ -8,6 +8,7 @@ lib_libfrr_la_LIBADD = $(LIBCAP) $(UNWIND_LIBS) $(LIBYANG_LIBS) $(LUA_LIB) $(LIB lib_libfrr_la_SOURCES = \ lib/agg_table.c \ lib/atomlist.c \ + lib/base64.c \ lib/bfd.c \ lib/buffer.c \ lib/checksum.c \ @@ -159,6 +160,7 @@ clippy_scan += \ pkginclude_HEADERS += \ lib/agg_table.h \ lib/atomlist.h \ + lib/base64.h \ lib/bfd.h \ lib/bitfield.h \ lib/buffer.h \ diff --git a/lib/yang_wrappers.c b/lib/yang_wrappers.c index c31ba3fcc..1a4a93164 100644 --- a/lib/yang_wrappers.c +++ b/lib/yang_wrappers.c @@ -19,6 +19,7 @@ #include <zebra.h> +#include "base64.h" #include "log.h" #include "lib_errors.h" #include "northbound.h" @@ -784,6 +785,78 @@ void yang_get_default_string_buf(char *buf, size_t size, const char *xpath_fmt, xpath); } +/* + * Primitive type: binary. + */ +struct yang_data *yang_data_new_binary(const char *xpath, const char *value, + size_t len) +{ + char *value_str; + struct base64_encodestate s; + int cnt; + char *c; + struct yang_data *data; + + value_str = (char *)malloc(len * 2); + base64_init_encodestate(&s); + cnt = base64_encode_block(value, len, value_str, &s); + c = value_str + cnt; + cnt = base64_encode_blockend(c, &s); + c += cnt; + *c = 0; + data = yang_data_new(xpath, value_str); + free(value_str); + return data; +} + +size_t yang_dnode_get_binary_buf(char *buf, size_t size, + const struct lyd_node *dnode, + const char *xpath_fmt, ...) +{ + const struct lyd_node_leaf_list *dleaf; + const char *canon; + size_t cannon_len; + size_t decode_len; + size_t ret_len; + size_t cnt; + char *value_str; + struct base64_decodestate s; + + assert(dnode); + if (xpath_fmt) { + va_list ap; + char xpath[XPATH_MAXLEN]; + + va_start(ap, xpath_fmt); + vsnprintf(xpath, sizeof(xpath), xpath_fmt, ap); + va_end(ap); + dnode = yang_dnode_get(dnode, xpath); + YANG_DNODE_GET_ASSERT(dnode, xpath); + } + + dleaf = (const struct lyd_node_leaf_list *)dnode; + canon = dleaf->value_str; + cannon_len = strlen(canon); + decode_len = cannon_len; + value_str = (char *)malloc(decode_len); + base64_init_decodestate(&s); + cnt = base64_decode_block(canon, cannon_len, value_str, &s); + + ret_len = size > cnt ? cnt : size; + memcpy(buf, value_str, ret_len); + if (size < cnt) { + char xpath[XPATH_MAXLEN]; + + yang_dnode_get_path(dnode, xpath, sizeof(xpath)); + flog_warn(EC_LIB_YANG_DATA_TRUNCATED, + "%s: value was truncated [xpath %s]", __func__, + xpath); + } + free(value_str); + return ret_len; +} + + /* * Primitive type: empty. */ diff --git a/lib/yang_wrappers.h b/lib/yang_wrappers.h index ba2cf5139..77289a303 100644 --- a/lib/yang_wrappers.h +++ b/lib/yang_wrappers.h @@ -118,6 +118,13 @@ extern const char *yang_get_default_string(const char *xpath_fmt, ...); extern void yang_get_default_string_buf(char *buf, size_t size, const char *xpath_fmt, ...); +/* binary */ +extern struct yang_data *yang_data_new_binary(const char *xpath, + const char *value, size_t len); +extern size_t yang_dnode_get_binary_buf(char *buf, size_t size, + const struct lyd_node *dnode, + const char *xpath_fmt, ...); + /* empty */ extern struct yang_data *yang_data_new_empty(const char *xpath); -- 2.34.1
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