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
17 #include <linux/keyctl.h>
20 * Cryptographic data for the public-key subtype of the asymmetric key type.
22 * Note that this may include private part of the key as well as the public
29 const char *pkey_algo;
32 extern void public_key_free(struct public_key *key);
35 * Public key cryptography signature data
37 struct public_key_signature {
38 struct asymmetric_key_id *auth_ids[2];
39 u8 *s; /* Signature */
40 u32 s_size; /* Number of bytes in signature */
42 u8 digest_size; /* Number of bytes in digest */
43 const char *pkey_algo;
44 const char *hash_algo;
48 extern void public_key_signature_free(struct public_key_signature *sig);
50 extern struct asymmetric_key_subtype public_key_subtype;
56 extern int restrict_link_by_signature(struct key *dest_keyring,
57 const struct key_type *type,
58 const union key_payload *payload,
59 struct key *trust_keyring);
61 extern int restrict_link_by_key_or_keyring(struct key *dest_keyring,
62 const struct key_type *type,
63 const union key_payload *payload,
66 extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring,
67 const struct key_type *type,
68 const union key_payload *payload,
71 extern int query_asymmetric_key(const struct kernel_pkey_params *,
72 struct kernel_pkey_query *);
74 extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *);
75 extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *);
76 extern int create_signature(struct kernel_pkey_params *, const void *, void *);
77 extern int verify_signature(const struct key *,
78 const struct public_key_signature *);
80 int public_key_verify_signature(const struct public_key *pkey,
81 const struct public_key_signature *sig);
83 #endif /* _LINUX_PUBLIC_KEY_H */