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authorMimi Zohar <zohar@linux.vnet.ibm.com>2015-11-10 16:34:46 +0300
committerMimi Zohar <zohar@linux.vnet.ibm.com>2015-12-15 18:01:43 +0300
commitd3600bcf9d64d88dc1d189a754dcfab960ce751f (patch)
tree0db5cee0ddb99cfe1cbd7f8314653f36ddf5005f /include/linux/key.h
parent80eae209d63ac6361c7b445f7e7e41f39c044772 (diff)
downloadlinux-d3600bcf9d64d88dc1d189a754dcfab960ce751f.tar.xz
KEYS: prevent keys from being removed from specified keyrings
Userspace should not be allowed to remove keys from certain keyrings (eg. blacklist), though the keys themselves can expire. This patch defines a new key flag named KEY_FLAG_KEEP to prevent userspace from being able to unlink, revoke, invalidate or timed out a key on a keyring. When this flag is set on the keyring, all keys subsequently added are flagged. In addition, when this flag is set, the keyring itself can not be cleared. Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com> Cc: David Howells <dhowells@redhat.com>
Diffstat (limited to 'include/linux/key.h')
-rw-r--r--include/linux/key.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/key.h b/include/linux/key.h
index 66f705243985..7321ab8ef949 100644
--- a/include/linux/key.h
+++ b/include/linux/key.h
@@ -177,6 +177,7 @@ struct key {
#define KEY_FLAG_TRUSTED_ONLY 9 /* set if keyring only accepts links to trusted keys */
#define KEY_FLAG_BUILTIN 10 /* set if key is builtin */
#define KEY_FLAG_ROOT_CAN_INVAL 11 /* set if key can be invalidated by root without permission */
+#define KEY_FLAG_KEEP 12 /* set if key should not be removed */
/* the key type and key description string
* - the desc is used to match a key against search criteria