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
|
/*
* Copyright (C) 2000 Nikos Mavroyanopoulos
* Copyright (C) 2004 Free Software Foundation
*
* 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>
cipher_hd_t _gnutls_cipher_init(gnutls_cipher_algorithm_t cipher,
const gnutls_datum_t * key,
const gnutls_datum_t * iv)
{
cipher_hd_t ret = NULL;
gcry_error_t err = GPG_ERR_GENERAL; /* doesn't matter */
switch (cipher) {
case GNUTLS_CIPHER_AES_128_CBC:
err =
gcry_cipher_open(&ret, GCRY_CIPHER_RIJNDAEL,
GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_AES_256_CBC:
err =
gcry_cipher_open(&ret, GCRY_CIPHER_RIJNDAEL256,
GCRY_CIPHER_MODE_CBC, 0);
break;
case GNUTLS_CIPHER_3DES_CBC:
err =
gcry_cipher_open(&ret, GCRY_CIPHER_3DES, GCRY_CIPHER_MODE_CBC,
0);
break;
case GNUTLS_CIPHER_DES_CBC:
err =
gcry_cipher_open(&ret, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_CBC,
0);
break;
case GNUTLS_CIPHER_ARCFOUR_128:
case GNUTLS_CIPHER_ARCFOUR_40:
err =
gcry_cipher_open(&ret, GCRY_CIPHER_ARCFOUR,
GCRY_CIPHER_MODE_STREAM, 0);
break;
case GNUTLS_CIPHER_RC2_40_CBC:
err =
gcry_cipher_open(&ret, GCRY_CIPHER_RFC2268_40,
GCRY_CIPHER_MODE_CBC, 0);
break;
default:
return NULL;
}
if (err == 0) {
gcry_cipher_setkey(ret, key->data, key->size);
if (iv->data != NULL && iv->size > 0)
gcry_cipher_setiv(ret, iv->data, iv->size);
} else if (cipher != GNUTLS_CIPHER_NULL) {
gnutls_assert();
_gnutls_x509_log("Gcrypt cipher[%d] error: %s\n", cipher,
gcry_strerror(err));
}
return ret;
}
int _gnutls_cipher_encrypt(cipher_hd_t handle, void *text, int textlen)
{
if (handle != GNUTLS_CIPHER_FAILED) {
if (gcry_cipher_encrypt(handle, text, textlen, NULL, textlen) != 0) {
gnutls_assert();
return GNUTLS_E_INTERNAL_ERROR;
}
}
return 0;
}
int _gnutls_cipher_decrypt(cipher_hd_t handle, void *ciphertext,
int ciphertextlen)
{
if (handle != GNUTLS_CIPHER_FAILED) {
if (gcry_cipher_decrypt
(handle, ciphertext, ciphertextlen, NULL,
ciphertextlen) != 0) {
gnutls_assert();
return GNUTLS_E_INTERNAL_ERROR;
}
}
return 0;
}
void _gnutls_cipher_deinit(cipher_hd_t handle)
{
if (handle != GNUTLS_CIPHER_FAILED) {
gcry_cipher_close(handle);
}
}
|
