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authorMat Martineau <mathew.j.martineau@linux.intel.com>2017-03-01 16:44:09 -0800
committerMat Martineau <mathew.j.martineau@linux.intel.com>2017-04-04 14:10:12 -0700
commit6563c91fd645556c7801748f15bc727c77fcd311 (patch)
tree714a6be7606cb6646c7b182bae136ef26bc9692e /security/keys/internal.h
parent4a420896f12d2d043602f134ae18ad6be5b9d9dd (diff)
downloadlinux-6563c91fd645556c7801748f15bc727c77fcd311.tar.bz2
KEYS: Add KEYCTL_RESTRICT_KEYRING
Keyrings recently gained restrict_link capabilities that allow individual keys to be validated prior to linking. This functionality was only available using internal kernel APIs. With the KEYCTL_RESTRICT_KEYRING command existing keyrings can be configured to check the content of keys before they are linked, and then allow or disallow linkage of that key to the keyring. To restrict a keyring, call: keyctl(KEYCTL_RESTRICT_KEYRING, key_serial_t keyring, const char *type, const char *restriction) where 'type' is the name of a registered key type and 'restriction' is a string describing how key linkage is to be restricted. The restriction option syntax is specific to each key type. Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Diffstat (limited to 'security/keys/internal.h')
-rw-r--r--security/keys/internal.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/security/keys/internal.h b/security/keys/internal.h
index 24762ae9a198..6ce016314897 100644
--- a/security/keys/internal.h
+++ b/security/keys/internal.h
@@ -252,6 +252,9 @@ struct iov_iter;
extern long keyctl_instantiate_key_common(key_serial_t,
struct iov_iter *,
key_serial_t);
+extern long keyctl_restrict_keyring(key_serial_t id,
+ const char __user *_type,
+ const char __user *_restriction);
#ifdef CONFIG_PERSISTENT_KEYRINGS
extern long keyctl_get_persistent(uid_t, key_serial_t);
extern unsigned persistent_keyring_expiry;