1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
/* cipher.h
* Copyright (C) 1998 Free Software Foundation, Inc.
*
* This file is part of GNUPG.
*
* GNUPG is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GNUPG is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifndef G10_CIPHER_H
#define G10_CIPHER_H
#define DBG_CIPHER g10c_debug_mode
#include "mpi.h"
#include "../cipher/random.h"
#define CIPHER_ALGO_NONE 0
#define CIPHER_ALGO_IDEA 1
#define CIPHER_ALGO_3DES 2
#define CIPHER_ALGO_CAST5 3
#define CIPHER_ALGO_BLOWFISH 4 /* blowfish 128 bit key */
#define CIPHER_ALGO_SAFER_SK128 5
#define CIPHER_ALGO_DES_SK 6
#define CIPHER_ALGO_TWOFISH 10 /* twofish 256 bit */
#define CIPHER_ALGO_SKIPJACK 101 /* experimental: skipjack */
#define CIPHER_ALGO_TWOFISH_OLD 102 /* experimental: twofish 128 bit */
#define CIPHER_ALGO_DUMMY 110 /* no encryption at all */
#define PUBKEY_ALGO_RSA 1
#define PUBKEY_ALGO_RSA_E 2 /* RSA encrypt only */
#define PUBKEY_ALGO_RSA_S 3 /* RSA sign only */
#define PUBKEY_ALGO_ELGAMAL_E 16 /* encrypt only ElGamal (but not for v3)*/
#define PUBKEY_ALGO_DSA 17
#define PUBKEY_ALGO_ELGAMAL 20 /* sign and encrypt elgamal */
#define PUBKEY_USAGE_SIG 1 /* key is good for signatures */
#define PUBKEY_USAGE_ENC 2 /* key is good for encryption */
#define DIGEST_ALGO_MD5 1
#define DIGEST_ALGO_SHA1 2
#define DIGEST_ALGO_RMD160 3
#define DIGEST_ALGO_TIGER 6
#define is_RSA(a) ((a)==PUBKEY_ALGO_RSA || (a)==PUBKEY_ALGO_RSA_E \
|| (a)==PUBKEY_ALGO_RSA_S )
#define is_ELGAMAL(a) ((a)==PUBKEY_ALGO_ELGAMAL || (a)==PUBKEY_ALGO_ELGAMAL_E)
typedef struct {
int algo;
int keylen;
byte key[32]; /* this is the largest used keylen (256 bit) */
} DEK;
struct cipher_handle_s;
typedef struct cipher_handle_s *CIPHER_HANDLE;
#define CIPHER_MODE_ECB 1
#define CIPHER_MODE_CFB 2
#define CIPHER_MODE_PHILS_CFB 3
#define CIPHER_MODE_AUTO_CFB 4
#define CIPHER_MODE_DUMMY 5 /* used with algo DUMMY for no encryption */
#define CIPHER_MODE_CBC 6
struct md_digest_list_s;
struct gcry_md_context {
int secure;
FILE *debug;
int finalized;
struct md_digest_list_s *list;
int bufcount;
int bufsize;
byte buffer[1];
};
typedef struct gcry_md_context *MD_HANDLE;
int g10c_debug_mode;
int g10_opt_verbose;
const char *g10_opt_homedir;
/*-- dynload.c --*/
void register_cipher_extension( const char *mainpgm, const char *fname );
/*-- md.c --*/
int string_to_digest_algo( const char *string );
const char * digest_algo_to_string( int algo );
int check_digest_algo( int algo );
MD_HANDLE md_open( int algo, int secure );
void md_enable( MD_HANDLE hd, int algo );
MD_HANDLE md_copy( MD_HANDLE a );
void md_reset( MD_HANDLE a );
void md_close(MD_HANDLE a);
void md_write( MD_HANDLE a, byte *inbuf, size_t inlen);
void md_final(MD_HANDLE a);
byte *md_read( MD_HANDLE a, int algo );
int md_digest( MD_HANDLE a, int algo, byte *buffer, int buflen );
int md_get_algo( MD_HANDLE a );
int md_digest_length( int algo );
const byte *md_asn_oid( int algo, size_t *asnlen, size_t *mdlen );
void md_start_debug( MD_HANDLE a, const char *suffix );
void md_stop_debug( MD_HANDLE a );
#define md_is_secure(a) ((a)->secure)
#define md_putc(h,c) \
do { \
if( (h)->bufcount == (h)->bufsize ) \
md_write( (h), NULL, 0 ); \
(h)->buffer[(h)->bufcount++] = (c) & 0xff; \
} while(0)
/*-- rmd160.c --*/
void rmd160_hash_buffer( char *outbuf, const char *buffer, size_t length );
/*-- cipher.c --*/
int string_to_cipher_algo( const char *string );
const char * cipher_algo_to_string( int algo );
void disable_cipher_algo( int algo );
int check_cipher_algo( int algo );
unsigned cipher_get_keylen( int algo );
unsigned cipher_get_blocksize( int algo );
CIPHER_HANDLE cipher_open( int algo, int mode, int secure );
void cipher_close( CIPHER_HANDLE c );
int cipher_setkey( CIPHER_HANDLE c, byte *key, unsigned keylen );
void cipher_setiv( CIPHER_HANDLE c, const byte *iv, unsigned ivlen );
void cipher_encrypt( CIPHER_HANDLE c, byte *out, byte *in, unsigned nbytes );
void cipher_decrypt( CIPHER_HANDLE c, byte *out, byte *in, unsigned nbytes );
void cipher_sync( CIPHER_HANDLE c );
/*-- pubkey.c --*/
#define PUBKEY_MAX_NPKEY 4
#define PUBKEY_MAX_NSKEY 6
#define PUBKEY_MAX_NSIG 2
#define PUBKEY_MAX_NENC 2
int string_to_pubkey_algo( const char *string );
const char * pubkey_algo_to_string( int algo );
void disable_pubkey_algo( int algo );
int check_pubkey_algo( int algo );
int check_pubkey_algo2( int algo, unsigned use );
int pubkey_get_npkey( int algo );
int pubkey_get_nskey( int algo );
int pubkey_get_nsig( int algo );
int pubkey_get_nenc( int algo );
unsigned pubkey_nbits( int algo, MPI *pkey );
int pubkey_generate( int algo, unsigned nbits, MPI *skey, MPI **retfactors );
int pubkey_check_secret_key( int algo, MPI *skey );
int pubkey_encrypt( int algo, MPI *resarr, MPI data, MPI *pkey );
int pubkey_decrypt( int algo, MPI *result, MPI *data, MPI *skey );
int pubkey_sign( int algo, MPI *resarr, MPI hash, MPI *skey );
int pubkey_verify( int algo, MPI hash, MPI *data, MPI *pkey,
int (*cmp)(void *, MPI), void *opaque );
/*-- smallprime.c --*/
extern ushort small_prime_numbers[];
/*-- primegen.c --*/
MPI generate_secret_prime( unsigned nbits );
MPI generate_public_prime( unsigned nbits );
MPI generate_elg_prime( int mode, unsigned pbits, unsigned qbits,
MPI g, MPI **factors );
#endif /*G10_CIPHER_H*/
|
