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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 | |
104 | struct key; |
105 | extern int verify_signature(const struct key *key, |
106 | const struct public_key_signature *sig); |
107 | |
108 | #endif /* _LINUX_PUBLIC_KEY_H */ |
109 |
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