KEYS: Add a new keyctl op to reject a key with a specified error code

Add a new keyctl op to reject a key with a specified error code.  This works
much the same as negating a key, and so keyctl_negate_key() is made a special
case of keyctl_reject_key().  The difference is that keyctl_negate_key()
selects ENOKEY as the error to be reported.

Typically the key would be rejected with EKEYEXPIRED, EKEYREVOKED or
EKEYREJECTED, but this is not mandatory.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: James Morris <jmorris@namei.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/keyctl.h b/include/linux/keyctl.h
index bd383f1944fb..7022974def0c 100644
--- a/include/linux/keyctl.h
+++ b/include/linux/keyctl.h
@@ -53,5 +53,6 @@
 #define KEYCTL_ASSUME_AUTHORITY         16      /* assume request_key() authorisation */
 #define KEYCTL_GET_SECURITY             17      /* get key security label */
 #define KEYCTL_SESSION_TO_PARENT        18      /* apply session keyring to parent process */
+#define KEYCTL_REJECT                   19      /* reject a partially constructed key */
 
 #endif /*  _LINUX_KEYCTL_H */