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1 | /* Asymmetric public-key algorithm definitions |
2 | * | |
3 | * See Documentation/crypto/asymmetric-keys.txt | |
4 | * | |
5 | * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved. | |
6 | * Written by David Howells (dhowells@redhat.com) | |
7 | * | |
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. | |
12 | */ | |
13 | ||
14 | #ifndef _LINUX_PUBLIC_KEY_H | |
15 | #define _LINUX_PUBLIC_KEY_H | |
16 | ||
17 | #include <linux/mpi.h> | |
18 | ||
19 | enum pkey_algo { | |
20 | PKEY_ALGO_DSA, | |
21 | PKEY_ALGO_RSA, | |
22 | PKEY_ALGO__LAST | |
23 | }; | |
24 | ||
25 | extern const char *const pkey_algo[PKEY_ALGO__LAST]; | |
26 | ||
27 | enum pkey_hash_algo { | |
28 | PKEY_HASH_MD4, | |
29 | PKEY_HASH_MD5, | |
30 | PKEY_HASH_SHA1, | |
31 | PKEY_HASH_RIPE_MD_160, | |
32 | PKEY_HASH_SHA256, | |
33 | PKEY_HASH_SHA384, | |
34 | PKEY_HASH_SHA512, | |
35 | PKEY_HASH_SHA224, | |
36 | PKEY_HASH__LAST | |
37 | }; | |
38 | ||
39 | extern const char *const pkey_hash_algo[PKEY_HASH__LAST]; | |
40 | ||
41 | enum pkey_id_type { | |
42 | PKEY_ID_PGP, /* OpenPGP generated key ID */ | |
43 | PKEY_ID_X509, /* X.509 arbitrary subjectKeyIdentifier */ | |
44 | PKEY_ID_TYPE__LAST | |
45 | }; | |
46 | ||
47 | extern const char *const pkey_id_type[PKEY_ID_TYPE__LAST]; | |
48 | ||
49 | /* | |
50 | * Cryptographic data for the public-key subtype of the asymmetric key type. | |
51 | * | |
52 | * Note that this may include private part of the key as well as the public | |
53 | * part. | |
54 | */ | |
55 | struct public_key { | |
56 | const struct public_key_algorithm *algo; | |
57 | u8 capabilities; | |
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; | |
63 | union { | |
64 | MPI mpi[5]; | |
65 | struct { | |
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) */ | |
71 | } dsa; | |
72 | struct { | |
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) */ | |
78 | } rsa; | |
79 | }; | |
80 | }; | |
81 | ||
82 | extern void public_key_destroy(void *payload); | |
83 | ||
84 | /* | |
85 | * Public key cryptography signature data | |
86 | */ | |
87 | struct public_key_signature { | |
88 | u8 *digest; | |
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; | |
92 | union { | |
93 | MPI mpi[2]; | |
94 | struct { | |
95 | MPI s; /* m^d mod n */ | |
96 | } rsa; | |
97 | struct { | |
98 | MPI r; | |
99 | MPI s; | |
100 | } dsa; | |
101 | }; | |
102 | }; | |
103 | ||
4ae71c1d DH |
104 | struct key; |
105 | extern int verify_signature(const struct key *key, | |
106 | const struct public_key_signature *sig); | |
107 | ||
a9681bf3 | 108 | #endif /* _LINUX_PUBLIC_KEY_H */ |