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| author | David Howells <dhowells@redhat.com> | 2014-07-18 18:56:36 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2014-07-22 21:46:51 +0100 |
| commit | 5d19e20b534ff4c17dfba792f1f9e33e1378e3f9 (patch) | |
| tree | 5ce389c633aa2362112146355f634abd677fdce7 | |
| parent | 002edaf76f09af658241029817f5ef66f6bef5e4 (diff) | |
| download | linux-5d19e20b534ff4c17dfba792f1f9e33e1378e3f9.tar.bz2 | |
KEYS: keyring: Provide key preparsing
Provide key preparsing in the keyring so that we can make preparsing
mandatory. For keyrings, however, only an empty payload is permitted.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Steve Dickson <steved@redhat.com>
Acked-by: Jeff Layton <jlayton@primarydata.com>
| -rw-r--r-- | security/keys/keyring.c | 34 |
1 files changed, 23 insertions, 11 deletions
diff --git a/security/keys/keyring.c b/security/keys/keyring.c index 9cf2575f0d97..8314a7d2104d 100644 --- a/security/keys/keyring.c +++ b/security/keys/keyring.c @@ -73,6 +73,8 @@ static inline unsigned keyring_hash(const char *desc) * can be treated as ordinary keys in addition to having their own special * operations. */ +static int keyring_preparse(struct key_preparsed_payload *prep); +static void keyring_free_preparse(struct key_preparsed_payload *prep); static int keyring_instantiate(struct key *keyring, struct key_preparsed_payload *prep); static void keyring_revoke(struct key *keyring); @@ -84,6 +86,8 @@ static long keyring_read(const struct key *keyring, struct key_type key_type_keyring = { .name = "keyring", .def_datalen = 0, + .preparse = keyring_preparse, + .free_preparse = keyring_free_preparse, .instantiate = keyring_instantiate, .match = user_match, .revoke = keyring_revoke, @@ -123,6 +127,21 @@ static void keyring_publish_name(struct key *keyring) } /* + * Preparse a keyring payload + */ +static int keyring_preparse(struct key_preparsed_payload *prep) +{ + return prep->datalen != 0 ? -EINVAL : 0; +} + +/* + * Free a preparse of a user defined key payload + */ +static void keyring_free_preparse(struct key_preparsed_payload *prep) +{ +} + +/* * Initialise a keyring. * * Returns 0 on success, -EINVAL if given any data. @@ -130,17 +149,10 @@ static void keyring_publish_name(struct key *keyring) static int keyring_instantiate(struct key *keyring, struct key_preparsed_payload *prep) { - int ret; - - ret = -EINVAL; - if (prep->datalen == 0) { - assoc_array_init(&keyring->keys); - /* make the keyring available by name if it has one */ - keyring_publish_name(keyring); - ret = 0; - } - - return ret; + assoc_array_init(&keyring->keys); + /* make the keyring available by name if it has one */ + keyring_publish_name(keyring); + return 0; } /* |