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1 | /* Asymmetric public-key cryptography key subtype |
2 | * | |
3 | * See Documentation/security/asymmetric-keys.txt | |
4 | * | |
5 | * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. | |
6 | * Written by David Howells (dhowells@redhat.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU General Public Licence | |
10 | * as published by the Free Software Foundation; either version | |
11 | * 2 of the Licence, or (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #ifndef _KEYS_ASYMMETRIC_SUBTYPE_H | |
15 | #define _KEYS_ASYMMETRIC_SUBTYPE_H | |
16 | ||
17 | #include <linux/seq_file.h> | |
18 | #include <keys/asymmetric-type.h> | |
19 | ||
20 | struct public_key_signature; | |
21 | ||
22 | /* | |
23 | * Keys of this type declare a subtype that indicates the handlers and | |
24 | * capabilities. | |
25 | */ | |
26 | struct asymmetric_key_subtype { | |
27 | struct module *owner; | |
28 | const char *name; | |
29 | unsigned short name_len; /* length of name */ | |
30 | ||
31 | /* Describe a key of this subtype for /proc/keys */ | |
32 | void (*describe)(const struct key *key, struct seq_file *m); | |
33 | ||
34 | /* Destroy a key of this subtype */ | |
3b764563 | 35 | void (*destroy)(void *payload_crypto, void *payload_auth); |
964f3b3b DH |
36 | |
37 | /* Verify the signature on a key of this subtype (optional) */ | |
38 | int (*verify_signature)(const struct key *key, | |
39 | const struct public_key_signature *sig); | |
40 | }; | |
41 | ||
42 | /** | |
43 | * asymmetric_key_subtype - Get the subtype from an asymmetric key | |
44 | * @key: The key of interest. | |
45 | * | |
46 | * Retrieves and returns the subtype pointer of the asymmetric key from the | |
47 | * type-specific data attached to the key. | |
48 | */ | |
49 | static inline | |
50 | struct asymmetric_key_subtype *asymmetric_key_subtype(const struct key *key) | |
51 | { | |
146aa8b1 | 52 | return key->payload.data[asym_subtype]; |
964f3b3b DH |
53 | } |
54 | ||
55 | #endif /* _KEYS_ASYMMETRIC_SUBTYPE_H */ |