diff options
| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2013-08-13 16:47:43 +0400 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2013-11-01 04:20:48 +0400 |
| commit | 217091dd7a7a1bdac027ddb7c5a25f6ac0b8e241 (patch) | |
| tree | 3a8a39da527431153698fc73640db47e8a1bd43a /security/integrity/digsig.c | |
| parent | bcbc9b0cf6d8f340a1d166e414f4612b353f7a9b (diff) | |
| download | linux-217091dd7a7a1bdac027ddb7c5a25f6ac0b8e241.tar.xz | |
ima: define '_ima' as a builtin 'trusted' keyring
Require all keys added to the IMA keyring be signed by an
existing trusted key on the system trusted keyring.
Changelog:
- define stub integrity_init_keyring() function (reported-by Fengguang Wu)
- differentiate between regular and trusted keyring names.
- replace printk with pr_info (D. Kasatkin)
Signed-off-by: Mimi Zohar <zohar@us.ibm.com>
Diffstat (limited to 'security/integrity/digsig.c')
| -rw-r--r-- | security/integrity/digsig.c | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/security/integrity/digsig.c b/security/integrity/digsig.c index b4af4ebc5be2..77ca965ab684 100644 --- a/security/integrity/digsig.c +++ b/security/integrity/digsig.c @@ -13,7 +13,9 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/err.h> +#include <linux/sched.h> #include <linux/rbtree.h> +#include <linux/cred.h> #include <linux/key-type.h> #include <linux/digsig.h> @@ -21,11 +23,19 @@ static struct key *keyring[INTEGRITY_KEYRING_MAX]; +#ifdef CONFIG_IMA_TRUSTED_KEYRING +static const char *keyring_name[INTEGRITY_KEYRING_MAX] = { + ".evm", + ".module", + ".ima", +}; +#else static const char *keyring_name[INTEGRITY_KEYRING_MAX] = { "_evm", "_module", "_ima", }; +#endif int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen, const char *digest, int digestlen) @@ -35,7 +45,7 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen, if (!keyring[id]) { keyring[id] = - request_key(&key_type_keyring, keyring_name[id], NULL); + request_key(&key_type_keyring, keyring_name[id], NULL); if (IS_ERR(keyring[id])) { int err = PTR_ERR(keyring[id]); pr_err("no %s keyring: %d\n", keyring_name[id], err); @@ -56,3 +66,21 @@ int integrity_digsig_verify(const unsigned int id, const char *sig, int siglen, return -EOPNOTSUPP; } + +int integrity_init_keyring(const unsigned int id) +{ + const struct cred *cred = current_cred(); + const struct user_struct *user = cred->user; + + keyring[id] = keyring_alloc(keyring_name[id], KUIDT_INIT(0), + KGIDT_INIT(0), cred, + ((KEY_POS_ALL & ~KEY_POS_SETATTR) | + KEY_USR_VIEW | KEY_USR_READ), + KEY_ALLOC_NOT_IN_QUOTA, user->uid_keyring); + if (!IS_ERR(keyring[id])) + set_bit(KEY_FLAG_TRUSTED_ONLY, &keyring[id]->flags); + else + pr_info("Can't allocate %s keyring (%ld)\n", + keyring_name[id], PTR_ERR(keyring[id])); + return 0; +} |