lkml.org 
[lkml]   [2019]   [Jan]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 1/2] integrity, KEYS: add a reference to platform keyring
Date
commit 9dc92c45177a ('integrity: Define a trusted platform keyring')
introduced a .platform keyring for storing preboot keys, used for
verifying kernel images' signature. 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>
Reviewed-by: Mimi Zohar <zohar@linux.ibm.com>
Tested-by: Mimi Zohar <zohar@linux.ibm.com>
---
certs/system_keyring.c | 9 +++++++++
include/keys/system_keyring.h | 5 +++++
security/integrity/digsig.c | 6 ++++++
3 files changed, 20 insertions(+)

diff --git a/certs/system_keyring.c b/certs/system_keyring.c
index 81728717523d..4690ef9cda8a 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;
@@ -265,4 +268,10 @@ int verify_pkcs7_signature(const void *data, size_t len,
}
EXPORT_SYMBOL_GPL(verify_pkcs7_signature);

+#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
+void __init set_platform_trusted_keys(struct key *keyring) {
+ platform_trusted_keys = keyring;
+}
+#endif
+
#endif /* CONFIG_SYSTEM_DATA_VERIFICATION */
diff --git a/include/keys/system_keyring.h b/include/keys/system_keyring.h
index 359c2f936004..9e1b7849b6aa 100644
--- a/include/keys/system_keyring.h
+++ b/include/keys/system_keyring.h
@@ -61,5 +61,10 @@ static inline struct key *get_ima_blacklist_keyring(void)
}
#endif /* CONFIG_IMA_BLACKLIST_KEYRING */

+#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
+
+extern void __init set_platform_trusted_keys(struct key* keyring);
+
+#endif /* CONFIG_INTEGRITY_PLATFORM_KEYRING */

#endif /* _KEYS_SYSTEM_KEYRING_H */
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c
index f45d6edecf99..bfabc2a8111d 100644
--- a/security/integrity/digsig.c
+++ b/security/integrity/digsig.c
@@ -89,6 +89,12 @@ static int __integrity_init_keyring(const unsigned int id, key_perm_t perm,
keyring[id] = NULL;
}

+#ifdef CONFIG_INTEGRITY_PLATFORM_KEYRING
+ if (id == INTEGRITY_KEYRING_PLATFORM) {
+ set_platform_trusted_keys(keyring[id]);
+ }
+#endif
+
return err;
}

--
2.20.1
\
 
 \ /
  Last update: 2019-01-18 10:20    [W:0.533 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site