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| author | Kairui Song <kasong@redhat.com> | 2019-01-21 17:59:28 +0800 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2019-02-04 17:29:19 -0500 |
| commit | 219a3e8676f3132d27b530c7d2d6bcab89536b57 (patch) | |
| tree | a79baecc80144b604d059a6828057210c7a06b9e | |
| parent | 2181e084b26bddca22bc3f23364c15809cfed28b (diff) | |
| download | linux-219a3e8676f3132d27b530c7d2d6bcab89536b57.tar.gz linux-219a3e8676f3132d27b530c7d2d6bcab89536b57.tar.bz2 linux-219a3e8676f3132d27b530c7d2d6bcab89536b57.zip | |
integrity, KEYS: add a reference to platform keyring
commit 9dc92c45177a ("integrity: Define a trusted platform keyring")
introduced a .platform keyring for storing preboot keys, used for
verifying kernel image signatures. Currently only IMA-appraisal is able
to use the keyring to verify kernel images that have their signature
stored in xattr.
This patch exposes the .platform keyring, making it accessible for
verifying PE signed kernel images as well.
Suggested-by: Mimi Zohar <zohar@linux.ibm.com>
Signed-off-by: Kairui Song <kasong@redhat.com>
Cc: David Howells <dhowells@redhat.com>
[zohar@linux.ibm.com: fixed checkpatch errors, squashed with patch fix]
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
| -rw-r--r-- | certs/system_keyring.c | 10 | ||||
| -rw-r--r-- | include/keys/system_keyring.h | 8 | ||||
| -rw-r--r-- | security/integrity/digsig.c | 3 |
3 files changed, 21 insertions, 0 deletions
diff --git a/certs/system_keyring.c b/certs/system_keyring.c index 81728717523d..da055e901df4 100644 --- a/certs/system_keyring.c +++ b/certs/system_keyring.c @@ -24,6 +24,9 @@ static struct key *builtin_trusted_keys; #ifdef CONFIG_SECONDARY_TRUSTED_KEYRING static struct key *secondary_trusted_keys; #endif +#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING +static struct key *platform_trusted_keys; +#endif extern __initconst const u8 system_certificate_list[]; extern __initconst const unsigned long system_certificate_list_size; @@ -266,3 +269,10 @@ error: EXPORT_SYMBOL_GPL(verify_pkcs7_signature); #endif /* CONFIG_SYSTEM_DATA_VERIFICATION */ + +#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING +void __init set_platform_trusted_keys(struct key *keyring) +{ + platform_trusted_keys = keyring; +} +#endif diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h index 359c2f936004..42a93eda331c 100644 --- a/include/keys/system_keyring.h +++ b/include/keys/system_keyring.h @@ -61,5 +61,13 @@ static inline struct key *get_ima_blacklist_keyring(void) } #endif /* CONFIG_IMA_BLACKLIST_KEYRING */ +#if defined(CONFIG_INTEGRITY_PLATFORM_KEYRING) && \ + defined(CONFIG_SYSTEM_TRUSTED_KEYRING) +extern void __init set_platform_trusted_keys(struct key *keyring); +#else +static inline void set_platform_trusted_keys(struct key *keyring) +{ +} +#endif #endif /* _KEYS_SYSTEM_KEYRING_H */ diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c index f45d6edecf99..e19c2eb72c51 100644 --- a/security/integrity/digsig.c +++ b/security/integrity/digsig.c @@ -87,6 +87,9 @@ static int __integrity_init_keyring(const unsigned int id, key_perm_t perm, pr_info("Can't allocate %s keyring (%d)\n", keyring_name[id], err); keyring[id] = NULL; + } else { + if (id == INTEGRITY_KEYRING_PLATFORM) + set_platform_trusted_keys(keyring[id]); } return err; |