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>
25 extern const char *const pkey_algo[PKEY_ALGO__LAST];
31 PKEY_HASH_RIPE_MD_160,
39 extern const char *const pkey_hash_algo[PKEY_HASH__LAST];
42 PKEY_ID_PGP, /* OpenPGP generated key ID */
43 PKEY_ID_X509, /* X.509 arbitrary subjectKeyIdentifier */
47 extern const char *const pkey_id_type[PKEY_ID_TYPE__LAST];
50 * Cryptographic data for the public-key subtype of the asymmetric key type.
52 * Note that this may include private part of the key as well as the public
56 const struct public_key_algorithm *algo;
58 #define PKEY_CAN_ENCRYPT 0x01
59 #define PKEY_CAN_DECRYPT 0x02
60 #define PKEY_CAN_SIGN 0x04
61 #define PKEY_CAN_VERIFY 0x08
62 enum pkey_id_type id_type : 8;
66 MPI p; /* DSA prime */
67 MPI q; /* DSA group order */
68 MPI g; /* DSA group generator */
69 MPI y; /* DSA public-key value = g^x mod p */
70 MPI x; /* DSA secret exponent (if present) */
73 MPI n; /* RSA public modulus */
74 MPI e; /* RSA public encryption exponent */
75 MPI d; /* RSA secret encryption exponent (if present) */
76 MPI p; /* RSA secret prime (if present) */
77 MPI q; /* RSA secret prime (if present) */
82 extern void public_key_destroy(void *payload);
85 * Public key cryptography signature data
87 struct public_key_signature {
89 u8 digest_size; /* Number of bytes in digest */
90 u8 nr_mpi; /* Occupancy of mpi[] */
91 enum pkey_hash_algo pkey_hash_algo : 8;
95 MPI s; /* m^d mod n */
105 extern int verify_signature(const struct key *key,
106 const struct public_key_signature *sig);
108 #endif /* _LINUX_PUBLIC_KEY_H */