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openSUSE:Step:15-SP4
mokutil.14995
mokutil-support-revoke-builtin-cert.patch
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File mokutil-support-revoke-builtin-cert.patch of Package mokutil.14995
From fe695869306567a1ae6c7ddbd87c2fbdc4a5bba1 Mon Sep 17 00:00:00 2001 From: Gary Ching-Pang Lin <glin@suse.com> Date: Fri, 21 Feb 2014 17:56:55 +0800 Subject: [PATCH 1/3] Add the option to revoke the built-in certificate This is an openSUSE-only patch. This commit adds an option to create ClearVerify which contains the password hash to notify MokManager to show the option to revoke the built-in certificate. --- src/mokutil.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) diff --git a/src/mokutil.c b/src/mokutil.c index 5b34f22..ab3d04f 100644 --- a/src/mokutil.c +++ b/src/mokutil.c @@ -83,6 +83,7 @@ #define IMPORT_HASH (1 << 21) #define DELETE_HASH (1 << 22) #define VERBOSITY (1 << 23) +#define REVOKE_CERT (1 << 24) #define DEFAULT_CRYPT_METHOD SHA512_BASED #define DEFAULT_SALT_SIZE SHA512_SALT_MAX @@ -156,6 +157,7 @@ print_help () printf (" --kek\t\t\t\t\tList the keys in KEK\n"); printf (" --db\t\t\t\t\tList the keys in db\n"); printf (" --dbx\t\t\t\t\tList the keys in dbx\n"); + printf (" --revoke-cert\t\t\t\tRevoke the built-in certificate in shim\n"); printf ("\n"); printf ("Supplimentary Options:\n"); printf (" --hash-file <hash file>\t\tUse the specific password hash\n"); @@ -1994,6 +1996,79 @@ set_verbosity (uint8_t verbosity) return 0; } +static int +revoke_builtin_cert (void) +{ + efi_variable_t var; + pw_crypt_t pw_crypt; + uint8_t auth[SHA256_DIGEST_LENGTH]; + char *password = NULL; + int pw_len; + int auth_ret; + int ret = -1; + + /* Check use_openSUSE_cert */ + memset (&var, 0, sizeof(var)); + var.VariableName = "use_openSUSE_cert"; + var.VendorGuid = SHIM_LOCK_GUID; + + if (read_variable (&var) != EFI_SUCCESS) + return 0; + + if ((uint8_t)*var.Data != 1) { + free (var.Data); + fprintf (stderr, "The built-in certificate is already revoked.\n"); + return 0; + } + free (var.Data); + + memset (&pw_crypt, 0, sizeof(pw_crypt_t)); + memset (auth, 0, SHA256_DIGEST_LENGTH); + + if (get_password (&password, &pw_len, PASSWORD_MIN, PASSWORD_MAX) < 0) { + fprintf (stderr, "Abort\n"); + goto error; + } + + if (!use_simple_hash) { + pw_crypt.method = DEFAULT_CRYPT_METHOD; + auth_ret = generate_hash (&pw_crypt, password, pw_len); + } else { + auth_ret = generate_auth (NULL, 0, password, pw_len, + auth); + } + if (auth_ret < 0) { + fprintf (stderr, "Couldn't generate hash\n"); + goto error; + } + + if (!use_simple_hash) { + var.Data = (void *)&pw_crypt; + var.DataSize = PASSWORD_CRYPT_SIZE; + } else { + var.Data = (void *)auth; + var.DataSize = SHA256_DIGEST_LENGTH; + } + var.VariableName = "ClearVerify"; + + var.VendorGuid = SHIM_LOCK_GUID; + var.Attributes = EFI_VARIABLE_NON_VOLATILE + | EFI_VARIABLE_BOOTSERVICE_ACCESS + | EFI_VARIABLE_RUNTIME_ACCESS; + + if (edit_protected_variable (&var) != EFI_SUCCESS) { + fprintf (stderr, "Failed to write ClearVerify\n"); + goto error; + } + + ret = 0; +error: + if (password) + free (password); + + return ret; +} + static inline int list_db (DBName db_name) { @@ -2070,6 +2145,7 @@ main (int argc, char *argv[]) {"kek", no_argument, 0, 0 }, {"db", no_argument, 0, 0 }, {"dbx", no_argument, 0, 0 }, + {"revoke-cert", no_argument, 0, 0 }, {0, 0, 0, 0} }; @@ -2157,6 +2233,8 @@ main (int argc, char *argv[]) command |= LIST_ENROLLED; db_name = DBX; } + } else if (strcmp (option, "revoke-cert") == 0) { + command |= REVOKE_CERT; } break; @@ -2416,6 +2494,10 @@ main (int argc, char *argv[]) case VERBOSITY: ret = set_verbosity (verbosity); break; + case REVOKE_CERT: + case REVOKE_CERT | SIMPLE_HASH: + ret = revoke_builtin_cert (); + break; default: print_help (); break; -- 2.9.0 From 09ac7c76b0c313abc664fe104bc32d89df0e0976 Mon Sep 17 00:00:00 2001 From: Gary Ching-Pang Lin <glin@suse.com> Date: Tue, 4 Nov 2014 14:50:36 +0800 Subject: [PATCH 2/3] Use the efivar functions to access UEFI variables This is an openSUSE-only patch. Adapt the changes in the mainline. --- src/mokutil.c | 45 +++++++++++++++++++++++++-------------------- 1 file changed, 25 insertions(+), 20 deletions(-) diff --git a/src/mokutil.c b/src/mokutil.c index ab3d04f..9dcf4f1 100644 --- a/src/mokutil.c +++ b/src/mokutil.c @@ -1999,28 +1999,35 @@ set_verbosity (uint8_t verbosity) static int revoke_builtin_cert (void) { - efi_variable_t var; + uint32_t attributes; + size_t data_size; + uint8_t *data; pw_crypt_t pw_crypt; uint8_t auth[SHA256_DIGEST_LENGTH]; char *password = NULL; - int pw_len; + unsigned int pw_len; int auth_ret; int ret = -1; /* Check use_openSUSE_cert */ - memset (&var, 0, sizeof(var)); - var.VariableName = "use_openSUSE_cert"; - var.VendorGuid = SHIM_LOCK_GUID; + if (efi_get_variable (efi_guid_shim, "use_openSUSE_cert", + &data, &data_size, &attributes) < 0) { + fprintf (stderr, "Failed to get use_openSUSE_cert\n"); + return 0; + } - if (read_variable (&var) != EFI_SUCCESS) + if (data_size != 1) { + free (data); + fprintf (stderr, "Invalid variable: use_openSUSE_cert\n"); return 0; + } - if ((uint8_t)*var.Data != 1) { - free (var.Data); + if (*data != 1) { + free (data); fprintf (stderr, "The built-in certificate is already revoked.\n"); return 0; } - free (var.Data); + free (data); memset (&pw_crypt, 0, sizeof(pw_crypt_t)); memset (auth, 0, SHA256_DIGEST_LENGTH); @@ -2043,20 +2050,18 @@ revoke_builtin_cert (void) } if (!use_simple_hash) { - var.Data = (void *)&pw_crypt; - var.DataSize = PASSWORD_CRYPT_SIZE; + data = (uint8_t *)&pw_crypt; + data_size = PASSWORD_CRYPT_SIZE; } else { - var.Data = (void *)auth; - var.DataSize = SHA256_DIGEST_LENGTH; + data = auth; + data_size = SHA256_DIGEST_LENGTH; } - var.VariableName = "ClearVerify"; - - var.VendorGuid = SHIM_LOCK_GUID; - var.Attributes = EFI_VARIABLE_NON_VOLATILE - | EFI_VARIABLE_BOOTSERVICE_ACCESS - | EFI_VARIABLE_RUNTIME_ACCESS; + attributes = EFI_VARIABLE_NON_VOLATILE + | EFI_VARIABLE_BOOTSERVICE_ACCESS + | EFI_VARIABLE_RUNTIME_ACCESS; - if (edit_protected_variable (&var) != EFI_SUCCESS) { + if (efi_set_variable (efi_guid_shim, "ClearVerify", + data, data_size, attributes) < 0) { fprintf (stderr, "Failed to write ClearVerify\n"); goto error; } -- 2.9.0 From 05c64b7b7d44f1c2a106e7273a33f83e57452d92 Mon Sep 17 00:00:00 2001 From: Gary Lin <glin@suse.com> Date: Wed, 13 Jul 2016 14:58:15 +0800 Subject: [PATCH 3/3] Use efi_set_variable from efivar 0.24 This is an openSUSE-only patch. --- src/mokutil.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/src/mokutil.c b/src/mokutil.c index 9dcf4f1..1a8ccc9 100644 --- a/src/mokutil.c +++ b/src/mokutil.c @@ -2061,7 +2061,8 @@ revoke_builtin_cert (void) | EFI_VARIABLE_RUNTIME_ACCESS; if (efi_set_variable (efi_guid_shim, "ClearVerify", - data, data_size, attributes) < 0) { + data, data_size, attributes, + S_IRUSR | S_IWUSR) < 0) { fprintf (stderr, "Failed to write ClearVerify\n"); goto error; } -- 2.9.0
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