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| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2014-07-22 10:39:48 -0400 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2014-07-25 11:47:46 -0700 |
| commit | 5a9196d715607f76d6b7d96a0970d6065335e62b (patch) | |
| tree | df323588d1026b947e489c5fb9c83299dbcb9689 /security/integrity/ima/ima_policy.c | |
| parent | 6593d9245bc66e6e3cf4ba6d365a7833110c1402 (diff) | |
| download | op-kernel-dev-5a9196d715607f76d6b7d96a0970d6065335e62b.zip op-kernel-dev-5a9196d715607f76d6b7d96a0970d6065335e62b.tar.gz | |
ima: add support for measuring and appraising firmware
The "security: introduce kernel_fw_from_file hook" patch defined a
new security hook to evaluate any loaded firmware that wasn't built
into the kernel.
This patch defines ima_fw_from_file(), which is called from the new
security hook, to measure and/or appraise the loaded firmware's
integrity.
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'security/integrity/ima/ima_policy.c')
| -rw-r--r-- | security/integrity/ima/ima_policy.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c index cea84d8..07099a8 100644 --- a/security/integrity/ima/ima_policy.c +++ b/security/integrity/ima/ima_policy.c @@ -84,6 +84,7 @@ static struct ima_rule_entry default_rules[] = { {.action = MEASURE, .func = FILE_CHECK, .mask = MAY_READ, .uid = GLOBAL_ROOT_UID, .flags = IMA_FUNC | IMA_MASK | IMA_UID}, {.action = MEASURE, .func = MODULE_CHECK, .flags = IMA_FUNC}, + {.action = MEASURE, .func = FIRMWARE_CHECK, .flags = IMA_FUNC}, }; static struct ima_rule_entry default_appraise_rules[] = { @@ -241,6 +242,8 @@ static int get_subaction(struct ima_rule_entry *rule, int func) return IMA_BPRM_APPRAISE; case MODULE_CHECK: return IMA_MODULE_APPRAISE; + case FIRMWARE_CHECK: + return IMA_FIRMWARE_APPRAISE; case FILE_CHECK: default: return IMA_FILE_APPRAISE; @@ -486,6 +489,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry) entry->func = FILE_CHECK; else if (strcmp(args[0].from, "MODULE_CHECK") == 0) entry->func = MODULE_CHECK; + else if (strcmp(args[0].from, "FIRMWARE_CHECK") == 0) + entry->func = FIRMWARE_CHECK; else if ((strcmp(args[0].from, "FILE_MMAP") == 0) || (strcmp(args[0].from, "MMAP_CHECK") == 0)) entry->func = MMAP_CHECK; @@ -636,6 +641,8 @@ static int ima_parse_rule(char *rule, struct ima_rule_entry *entry) result = -EINVAL; else if (entry->func == MODULE_CHECK) ima_appraise |= IMA_APPRAISE_MODULES; + else if (entry->func == FIRMWARE_CHECK) + ima_appraise |= IMA_APPRAISE_FIRMWARE; audit_log_format(ab, "res=%d", !result); audit_log_end(ab); return result; |
