1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /* Asymmetric public-key algorithm definitions
4 * See Documentation/crypto/asymmetric-keys.rst
6 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
7 * Written by David Howells (dhowells@redhat.com)
10 #ifndef _LINUX_PUBLIC_KEY_H
11 #define _LINUX_PUBLIC_KEY_H
13 #include <linux/keyctl.h>
14 #include <linux/oid_registry.h>
17 * Cryptographic data for the public-key subtype of the asymmetric key type.
19 * Note that this may include private part of the key as well as the public
30 const char *pkey_algo;
33 extern void public_key_free(struct public_key *key);
36 * Public key cryptography signature data
38 struct public_key_signature {
39 struct asymmetric_key_id *auth_ids[3];
40 u8 *s; /* Signature */
42 u32 s_size; /* Number of bytes in signature */
43 u32 digest_size; /* Number of bytes in digest */
44 const char *pkey_algo;
45 const char *hash_algo;
48 unsigned int data_size;
51 extern void public_key_signature_free(struct public_key_signature *sig);
53 extern struct asymmetric_key_subtype public_key_subtype;
59 extern int restrict_link_by_signature(struct key *dest_keyring,
60 const struct key_type *type,
61 const union key_payload *payload,
62 struct key *trust_keyring);
64 extern int restrict_link_by_key_or_keyring(struct key *dest_keyring,
65 const struct key_type *type,
66 const union key_payload *payload,
69 extern int restrict_link_by_key_or_keyring_chain(struct key *trust_keyring,
70 const struct key_type *type,
71 const union key_payload *payload,
74 extern int query_asymmetric_key(const struct kernel_pkey_params *,
75 struct kernel_pkey_query *);
77 extern int encrypt_blob(struct kernel_pkey_params *, const void *, void *);
78 extern int decrypt_blob(struct kernel_pkey_params *, const void *, void *);
79 extern int create_signature(struct kernel_pkey_params *, const void *, void *);
80 extern int verify_signature(const struct key *,
81 const struct public_key_signature *);
83 int public_key_verify_signature(const struct public_key *pkey,
84 const struct public_key_signature *sig);
86 #endif /* _LINUX_PUBLIC_KEY_H */