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/mpi.h>
18 #include <crypto/hash_info.h>
26 extern const char *const pkey_algo_name[PKEY_ALGO__LAST];
27 extern const struct public_key_algorithm *pkey_algo[PKEY_ALGO__LAST];
29 /* asymmetric key implementation supports only up to SHA224 */
30 #define PKEY_HASH__LAST (HASH_ALGO_SHA224 + 1)
33 PKEY_ID_PGP, /* OpenPGP generated key ID */
34 PKEY_ID_X509, /* X.509 arbitrary subjectKeyIdentifier */
38 extern const char *const pkey_id_type_name[PKEY_ID_TYPE__LAST];
41 * Cryptographic data for the public-key subtype of the asymmetric key type.
43 * Note that this may include private part of the key as well as the public
47 const struct public_key_algorithm *algo;
49 #define PKEY_CAN_ENCRYPT 0x01
50 #define PKEY_CAN_DECRYPT 0x02
51 #define PKEY_CAN_SIGN 0x04
52 #define PKEY_CAN_VERIFY 0x08
53 enum pkey_algo pkey_algo : 8;
54 enum pkey_id_type id_type : 8;
58 MPI p; /* DSA prime */
59 MPI q; /* DSA group order */
60 MPI g; /* DSA group generator */
61 MPI y; /* DSA public-key value = g^x mod p */
62 MPI x; /* DSA secret exponent (if present) */
65 MPI n; /* RSA public modulus */
66 MPI e; /* RSA public encryption exponent */
67 MPI d; /* RSA secret encryption exponent (if present) */
68 MPI p; /* RSA secret prime (if present) */
69 MPI q; /* RSA secret prime (if present) */
74 extern void public_key_destroy(void *payload);
77 * Public key cryptography signature data
79 struct public_key_signature {
81 u8 digest_size; /* Number of bytes in digest */
82 u8 nr_mpi; /* Occupancy of mpi[] */
83 enum pkey_algo pkey_algo : 8;
84 enum hash_algo pkey_hash_algo : 8;
88 MPI s; /* m^d mod n */
98 extern int verify_signature(const struct key *key,
99 const struct public_key_signature *sig);
101 #endif /* _LINUX_PUBLIC_KEY_H */