David Howells | 964f3b3 | 2012-09-13 15:17:21 +0100 | [diff] [blame] | 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 */ |
| 35 | void (*destroy)(void *payload); |
| 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 | { |
David Howells | 146aa8b | 2015-10-21 14:04:48 +0100 | [diff] [blame^] | 52 | return key->payload.data[asym_subtype]; |
David Howells | 964f3b3 | 2012-09-13 15:17:21 +0100 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | #endif /* _KEYS_ASYMMETRIC_SUBTYPE_H */ |