[PATCH v4 02/10] IMA: Added KEYRING_CHECK func in IMA policy to measure keys
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STALE2529d
From: Lakshmi Ramasubramanian <hidden>
Date: 2019-11-06 19:02:05
Also in:
keyrings, linux-integrity, lkml
Subsystem:
extended verification module (evm), integrity measurement architecture (ima), security subsystem, the rest · Maintainers:
Mimi Zohar, Roberto Sassu, Dmitry Kasatkin, Paul Moore, James Morris, "Serge E. Hallyn", Linus Torvalds
Revision v4 of 12 in this series.
Revisions (12)
IMA policy needs to support a func to enable measurement of asymmetric keys. This patch defines a new IMA policy func namely KEYRING_CHECK to measure asymmetric keys. Signed-off-by: Lakshmi Ramasubramanian <redacted> --- Documentation/ABI/testing/ima_policy | 6 ++++++ security/integrity/ima/ima.h | 1 + security/integrity/ima/ima_policy.c | 2 +- 3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/Documentation/ABI/testing/ima_policy b/Documentation/ABI/testing/ima_policy
index 29aaedf33246..341df49b5ad1 100644
--- a/Documentation/ABI/testing/ima_policy
+++ b/Documentation/ABI/testing/ima_policy@@ -30,6 +30,7 @@ Description: [FIRMWARE_CHECK] [KEXEC_KERNEL_CHECK] [KEXEC_INITRAMFS_CHECK] [KEXEC_CMDLINE] + [KEYRING_CHECK] mask:= [[^]MAY_READ] [[^]MAY_WRITE] [[^]MAY_APPEND] [[^]MAY_EXEC] fsmagic:= hex value
@@ -113,3 +114,8 @@ Description: Example of appraise rule allowing modsig appended signatures: appraise func=KEXEC_KERNEL_CHECK appraise_type=imasig|modsig + + Example of measure rule using KEYRING_CHECK to measure + all keys: + + measure func=KEYRING_CHECK
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h
index df4ca482fb53..7f23405b2718 100644
--- a/security/integrity/ima/ima.h
+++ b/security/integrity/ima/ima.h@@ -193,6 +193,7 @@ static inline unsigned long ima_hash_key(u8 *digest) hook(KEXEC_INITRAMFS_CHECK) \ hook(POLICY_CHECK) \ hook(KEXEC_CMDLINE) \ + hook(KEYRING_CHECK) \ hook(MAX_CHECK) #define __ima_hook_enumify(ENUM) ENUM,
diff --git a/security/integrity/ima/ima_policy.c b/security/integrity/ima/ima_policy.c
index f19a895ad7cd..4344b7354fc5 100644
--- a/security/integrity/ima/ima_policy.c
+++ b/security/integrity/ima/ima_policy.c@@ -373,7 +373,7 @@ static bool ima_match_rules(struct ima_rule_entry *rule, struct inode *inode, { int i; - if (func == KEXEC_CMDLINE) { + if ((func == KEXEC_CMDLINE) || (func == KEYRING_CHECK)) { if ((rule->flags & IMA_FUNC) && (rule->func == func)) return true; return false;
--
2.17.1