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

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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>
This commit is contained in:
David Howells 2011-03-07 15:06:09 +00:00 • committed by James Morris
commit fdd1b94581
11 changed files with 81 additions and 20 deletions
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11
include/linux/key-type.h
View file

@ -105,11 +105,20 @@ extern int key_instantiate_and_link(struct key *key,
size_t datalen,
struct key *keyring,
struct key *instkey);
extern int key_negate_and_link(struct key *key,
extern int key_reject_and_link(struct key *key,
unsigned timeout,
unsigned error,
struct key *keyring,
struct key *instkey);
extern void complete_request_key(struct key_construction *cons, int error);
static inline int key_negate_and_link(struct key *key,
unsigned timeout,
struct key *keyring,
struct key *instkey)
{
return key_reject_and_link(key, timeout, ENOKEY, keyring, instkey);
}
#endif /* CONFIG_KEYS */
#endif /* _LINUX_KEY_TYPE_H */

1
include/linux/key.h
View file

@ -170,6 +170,7 @@ struct key {
struct list_head link;
unsigned long x[2];
void *p[2];
int reject_error;
} type_data;
/* key data

1
include/linux/keyctl.h
View file

@ -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 */