include/linux/digsig.h

0001 /* SPDX-License-Identifier: GPL-2.0-only */
0002 /*
0003  * Copyright (C) 2011 Nokia Corporation
0004  * Copyright (C) 2011 Intel Corporation
0005  *
0006  * Author:
0007  * Dmitry Kasatkin <dmitry.kasatkin@nokia.com>
0008  *                 <dmitry.kasatkin@intel.com>
0009  */
0010
0011 #ifndef _DIGSIG_H
0012 #define _DIGSIG_H
0013
0014 #include <linux/key.h>
0015
0016 enum pubkey_algo {
0017     PUBKEY_ALGO_RSA,
0018     PUBKEY_ALGO_MAX,
0019 };
0020
0021 enum digest_algo {
0022     DIGEST_ALGO_SHA1,
0023     DIGEST_ALGO_SHA256,
0024     DIGEST_ALGO_MAX
0025 };
0026
0027 struct pubkey_hdr {
0028     uint8_t     version;    /* key format version */
0029     uint32_t    timestamp;  /* key made, always 0 for now */
0030     uint8_t     algo;
0031     uint8_t     nmpi;
0032     char        mpi[];
0033 } __packed;
0034
0035 struct signature_hdr {
0036     uint8_t     version;    /* signature format version */
0037     uint32_t    timestamp;  /* signature made */
0038     uint8_t     algo;
0039     uint8_t     hash;
0040     uint8_t     keyid[8];
0041     uint8_t     nmpi;
0042     char        mpi[];
0043 } __packed;
0044
0045 #if defined(CONFIG_SIGNATURE) || defined(CONFIG_SIGNATURE_MODULE)
0046
0047 int digsig_verify(struct key *keyring, const char *sig, int siglen,
0048                     const char *digest, int digestlen);
0049
0050 #else
0051
0052 static inline int digsig_verify(struct key *keyring, const char *sig,
0053                 int siglen, const char *digest, int digestlen)
0054 {
0055     return -EOPNOTSUPP;
0056 }
0057
0058 #endif /* CONFIG_SIGNATURE */
0059
0060 #endif /* _DIGSIG_H */