1 /* Asymmetric public-key algorithm definitions
3 * See Documentation/crypto/asymmetric-keys.txt
5 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
6 * Written by David Howells (dhowells@redhat.com)
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.
14 #ifndef _LINUX_PUBLIC_KEY_H
15 #define _LINUX_PUBLIC_KEY_H
18 * The use to which an asymmetric key is being put.
20 enum key_being_used_for {
21 VERIFYING_MODULE_SIGNATURE,
22 VERIFYING_FIRMWARE_SIGNATURE,
23 VERIFYING_KEXEC_PE_SIGNATURE,
24 VERIFYING_KEY_SIGNATURE,
25 VERIFYING_KEY_SELF_SIGNATURE,
26 VERIFYING_UNSPECIFIED_SIGNATURE,
27 NR__KEY_BEING_USED_FOR
29 extern const char *const key_being_used_for[NR__KEY_BEING_USED_FOR];
32 * Cryptographic data for the public-key subtype of the asymmetric key type.
34 * Note that this may include private part of the key as well as the public
41 const char *pkey_algo;
44 extern void public_key_free(struct public_key *key);
47 * Public key cryptography signature data
49 struct public_key_signature {
50 u8 *s; /* Signature */
51 u32 s_size; /* Number of bytes in signature */
53 u8 digest_size; /* Number of bytes in digest */
54 const char *pkey_algo;
55 const char *hash_algo;
58 extern void public_key_signature_free(struct public_key_signature *sig);
60 extern struct asymmetric_key_subtype public_key_subtype;
63 extern int verify_signature(const struct key *key,
64 const struct public_key_signature *sig);
66 struct asymmetric_key_id;
67 extern struct key *x509_request_asymmetric_key(struct key *keyring,
68 const struct asymmetric_key_id *id,
69 const struct asymmetric_key_id *skid,
72 int public_key_verify_signature(const struct public_key *pkey,
73 const struct public_key_signature *sig);
75 #endif /* _LINUX_PUBLIC_KEY_H */