1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2011 Nokia Corporation
4 * Copyright (C) 2011 Intel Corporation
5 *
6 * Author:
7 * Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
8 *                 <dmitry.kasatkin@intel.com>
9 */
10
11#ifndef _DIGSIG_H
12#define _DIGSIG_H
13
14#include <linux/key.h>
15
16enum pubkey_algo {
17	PUBKEY_ALGO_RSA,
18	PUBKEY_ALGO_MAX,
19};
20
21enum digest_algo {
22	DIGEST_ALGO_SHA1,
23	DIGEST_ALGO_SHA256,
24	DIGEST_ALGO_MAX
25};
26
27struct pubkey_hdr {
28	uint8_t		version;	/* key format version */
29	uint32_t	timestamp;	/* key made, always 0 for now */
30	uint8_t		algo;
31	uint8_t		nmpi;
32	char		mpi[];
33} __packed;
34
35struct signature_hdr {
36	uint8_t		version;	/* signature format version */
37	uint32_t	timestamp;	/* signature made */
38	uint8_t		algo;
39	uint8_t		hash;
40	uint8_t		keyid[8];
41	uint8_t		nmpi;
42	char		mpi[];
43} __packed;
44
45#if defined(CONFIG_SIGNATURE) || defined(CONFIG_SIGNATURE_MODULE)
46
47int digsig_verify(struct key *keyring, const char *sig, int siglen,
48					const char *digest, int digestlen);
49
50#else
51
52static inline int digsig_verify(struct key *keyring, const char *sig,
53				int siglen, const char *digest, int digestlen)
54{
55	return -EOPNOTSUPP;
56}
57
58#endif /* CONFIG_SIGNATURE */
59
60#endif /* _DIGSIG_H */
61