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David Howellsa9681bf2012-09-21 23:24:55 +01001/* Asymmetric public-key algorithm definitions
2 *
3 * See Documentation/crypto/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 _LINUX_PUBLIC_KEY_H
15#define _LINUX_PUBLIC_KEY_H
16
David Howellsa9681bf2012-09-21 23:24:55 +010017/*
18 * Cryptographic data for the public-key subtype of the asymmetric key type.
19 *
20 * Note that this may include private part of the key as well as the public
21 * part.
22 */
23struct public_key {
Tadeusz Strukdb6c43b2016-02-02 10:08:53 -080024 void *key;
25 u32 keylen;
David Howells4e8ae722016-03-03 21:49:27 +000026 const char *id_type;
27 const char *pkey_algo;
David Howellsa9681bf2012-09-21 23:24:55 +010028};
29
David Howells3b764562016-04-06 16:13:33 +010030extern void public_key_free(struct public_key *key);
David Howellsa9681bf2012-09-21 23:24:55 +010031
32/*
33 * Public key cryptography signature data
34 */
35struct public_key_signature {
David Howellsa022ec02016-04-06 16:13:33 +010036 struct asymmetric_key_id *auth_ids[2];
Tadeusz Strukdb6c43b2016-02-02 10:08:53 -080037 u8 *s; /* Signature */
38 u32 s_size; /* Number of bytes in signature */
David Howellsa9681bf2012-09-21 23:24:55 +010039 u8 *digest;
Tadeusz Strukd846e782016-02-02 10:09:03 -080040 u8 digest_size; /* Number of bytes in digest */
David Howells4e8ae722016-03-03 21:49:27 +000041 const char *pkey_algo;
42 const char *hash_algo;
David Howellsa9681bf2012-09-21 23:24:55 +010043};
44
David Howells3b764562016-04-06 16:13:33 +010045extern void public_key_signature_free(struct public_key_signature *sig);
46
Tadeusz Strukdb6c43b2016-02-02 10:08:53 -080047extern struct asymmetric_key_subtype public_key_subtype;
David Howells3b764562016-04-06 16:13:33 +010048
David Howells4ae71c12012-09-21 23:25:04 +010049struct key;
David Howellsa511e1a2016-04-06 16:14:26 +010050struct key_type;
51union key_payload;
52
53extern int restrict_link_by_signature(struct key *trust_keyring,
54 const struct key_type *type,
55 const union key_payload *payload);
56
David Howells4ae71c12012-09-21 23:25:04 +010057extern int verify_signature(const struct key *key,
58 const struct public_key_signature *sig);
59
Tadeusz Strukdb6c43b2016-02-02 10:08:53 -080060int public_key_verify_signature(const struct public_key *pkey,
61 const struct public_key_signature *sig);
62
David Howellsa9681bf2012-09-21 23:24:55 +010063#endif /* _LINUX_PUBLIC_KEY_H */