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 
16 enum pubkey_algo {
17 	PUBKEY_ALGO_RSA,
18 	PUBKEY_ALGO_MAX,
19 };
20 
21 enum digest_algo {
22 	DIGEST_ALGO_SHA1,
23 	DIGEST_ALGO_SHA256,
24 	DIGEST_ALGO_MAX
25 };
26 
27 struct 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 
35 struct 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 
47 int digsig_verify(struct key *keyring, const char *sig, int siglen,
48 					const char *digest, int digestlen);
49 
50 #else
51 
digsig_verify(struct key * keyring,const char * sig,int siglen,const char * digest,int digestlen)52 static 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