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
|
/*
* Copyright (C) 2000 Nikos Mavroyanopoulos
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <gnutls_int.h>
#include <gnutls_errors.h>
#include <gnutls_cipher_int.h>
#include <gnutls_datum.h>
GNUTLS_CIPHER_HANDLE _gnutls_cipher_init( BulkCipherAlgorithm cipher, gnutls_datum key, gnutls_datum iv)
{
GNUTLS_CIPHER_HANDLE ret;
switch (cipher) {
case GNUTLS_CIPHER_NULL:
ret = GNUTLS_CIPHER_FAILED;
break;
case GNUTLS_CIPHER_RIJNDAEL_128_CBC:
#ifdef USE_MCRYPT
ret = mcrypt_module_open( "rijndael-128", NULL, "cbc", NULL);
#else
ret = gcry_cipher_open(GCRY_CIPHER_RIJNDAEL, GCRY_CIPHER_MODE_CBC, 0);
#endif
break;
case GNUTLS_CIPHER_RIJNDAEL_256_CBC:
#ifdef USE_MCRYPT
ret = mcrypt_module_open( "rijndael-128", NULL, "cbc", NULL);
#else
ret = gcry_cipher_open(GCRY_CIPHER_RIJNDAEL256, GCRY_CIPHER_MODE_CBC, 0);
#endif
break;
case GNUTLS_CIPHER_TWOFISH_128_CBC:
#ifdef USE_MCRYPT
ret = mcrypt_module_open( "twofish", NULL, "cbc", NULL);
#else
ret = gcry_cipher_open(GCRY_CIPHER_TWOFISH, GCRY_CIPHER_MODE_CBC, 0);
#endif
break;
case GNUTLS_CIPHER_3DES_CBC:
#ifdef USE_MCRYPT
ret = mcrypt_module_open( "tripledes", NULL, "cbc", NULL);
#else
ret = gcry_cipher_open(GCRY_CIPHER_3DES, GCRY_CIPHER_MODE_CBC, 0);
#endif
break;
case GNUTLS_CIPHER_ARCFOUR:
case GNUTLS_CIPHER_ARCFOUR_EXPORT:
#ifdef USE_MCRYPT
ret = mcrypt_module_open( "arcfour", NULL, "stream", NULL);
#else
ret = gcry_cipher_open(GCRY_CIPHER_ARCFOUR, GCRY_CIPHER_MODE_STREAM, 0);
#endif
break;
default:
ret = GNUTLS_CIPHER_FAILED;
}
if (ret!=GNUTLS_CIPHER_FAILED) {
#ifdef USE_MCRYPT
/* ivsize is assumed to be blocksize */
if ( mcrypt_generic_init( ret, key.data, key.size, iv.data) < 0) {
return GNUTLS_CIPHER_FAILED;
};
#else
gcry_cipher_setkey(ret, key.data, key.size);
if (iv.data!=NULL && iv.size>0) gcry_cipher_setiv(ret, iv.data, iv.size);
#endif
}
return ret;
}
int _gnutls_cipher_encrypt(GNUTLS_CIPHER_HANDLE handle, void* text, int textlen) {
if (handle!=GNUTLS_CIPHER_FAILED) {
#ifdef USE_MCRYPT
mcrypt_generic( handle, text, textlen);
#else
if (gcry_cipher_encrypt( handle, text, textlen, NULL, textlen)!=0) {
gnutls_assert();
return GNUTLS_E_UNKNOWN_ERROR;
}
#endif
}
return 0;
}
int _gnutls_cipher_decrypt(GNUTLS_CIPHER_HANDLE handle, void* ciphertext, int ciphertextlen) {
if (handle!=GNUTLS_CIPHER_FAILED) {
#ifdef USE_MCRYPT
mdecrypt_generic( handle, ciphertext, ciphertextlen);
#else
if (gcry_cipher_decrypt( handle, ciphertext, ciphertextlen, NULL, ciphertextlen)!=0) {
gnutls_assert();
return GNUTLS_E_UNKNOWN_ERROR;
}
#endif
}
return 0;
}
void _gnutls_cipher_deinit(GNUTLS_CIPHER_HANDLE handle) {
if (handle!=GNUTLS_CIPHER_FAILED) {
#ifdef USE_MCRYPT
mcrypt_generic_end( handle);
#else
gcry_cipher_close(handle);
#endif
}
}
|
