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
178
179
180
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
* Authors: Jeffrey Stedfast <fejj@ximian.com>
*
* Copyright 2001 Ximian, Inc. (www.ximian.com)
*
* This program 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.
*
* This program 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 Street #330, Boston, MA 02111-1307, USA.
*
*/
#include <config.h>
#include "camel-sasl-cram-md5.h"
#include "camel-mime-utils.h"
#include <e-util/md5-utils.h>
#include <stdio.h>
#include <string.h>
static CamelSaslClass *parent_class = NULL;
/* Returns the class for a CamelSaslCramMd5 */
#define CSCM_CLASS(so) CAMEL_SASL_CRAM_MD5_CLASS (CAMEL_OBJECT_GET_CLASS (so))
static GByteArray *cram_md5_challenge (CamelSasl *sasl, const char *token, CamelException *ex);
enum {
STATE_AUTH
};
struct _CamelSaslCramMd5Private {
int state;
};
static void
camel_sasl_cram_md5_class_init (CamelSaslCramMd5Class *camel_sasl_cram_md5_class)
{
CamelSaslClass *camel_sasl_class = CAMEL_SASL_CLASS (camel_sasl_cram_md5_class);
parent_class = CAMEL_SASL_CLASS (camel_type_get_global_classfuncs (camel_sasl_get_type ()));
/* virtual method overload */
camel_sasl_class->challenge = cram_md5_challenge;
}
static void
camel_sasl_cram_md5_init (gpointer object, gpointer klass)
{
CamelSaslCramMd5 *sasl_cram = CAMEL_SASL_CRAM_MD5 (object);
sasl_cram->priv = g_new0 (struct _CamelSaslCramMd5Private, 1);
}
static void
camel_sasl_cram_md5_finalize (CamelObject *object)
{
CamelSaslCramMd5 *sasl = CAMEL_SASL_CRAM_MD5 (object);
g_free (sasl->username);
g_free (sasl->priv);
}
CamelType
camel_sasl_cram_md5_get_type (void)
{
static CamelType type = CAMEL_INVALID_TYPE;
if (type == CAMEL_INVALID_TYPE) {
type = camel_type_register (camel_sasl_get_type (),
"CamelSaslCramMd5",
sizeof (CamelSaslCramMd5),
sizeof (CamelSaslCramMd5Class),
(CamelObjectClassInitFunc) camel_sasl_cram_md5_class_init,
NULL,
(CamelObjectInitFunc) camel_sasl_cram_md5_init,
(CamelObjectFinalizeFunc) camel_sasl_cram_md5_finalize);
}
return type;
}
CamelSasl *
camel_sasl_cram_md5_new (const char *username, const char *passwd)
{
CamelSaslCramMd5 *sasl_cram;
if (!username) return NULL;
if (!passwd) return NULL;
sasl_cram = CAMEL_SASL_CRAM_MD5 (camel_object_new (camel_sasl_cram_md5_get_type ()));
sasl_cram->username = g_strdup (username);
sasl_cram->passwd = g_strdup (passwd);
return CAMEL_SASL (sasl_cram);
}
/* CRAM-MD5 algorithm:
* MD5 ((passwd XOR opad), MD5 ((passwd XOR ipad), timestamp))
*/
static GByteArray *
cram_md5_challenge (CamelSasl *sasl, const char *token, CamelException *ex)
{
CamelSaslCramMd5 *sasl_cram = CAMEL_SASL_CRAM_MD5 (sasl);
struct _CamelSaslCramMd5Private *priv = sasl_cram->priv;
char *timestamp, *passwd, *buf, *enc;
guchar digest[16], md5asc[33], *s, *p;
GByteArray *ret = NULL;
guchar ipad[64];
guchar opad[64];
MD5Context ctx;
int i, pw_len;
switch (priv->state) {
case STATE_AUTH:
timestamp = g_strdup (token);
base64_decode_simple (timestamp, strlen (timestamp));
passwd = sasl_cram->passwd;
pw_len = strlen (sasl_cram->passwd);
if (pw_len > 64) {
md5_init (&ctx);
md5_update (&ctx, passwd, pw_len);
md5_final (&ctx, digest);
passwd = g_strdup (digest);
pw_len = 16;
}
memset (ipad, 0, sizeof (ipad));
memset (opad, 0, sizeof (opad));
memcpy (ipad, passwd, pw_len);
memcpy (opad, passwd, pw_len);
for (i = 0; i < 64; i++) {
ipad[i] ^= 0x36;
opad[i] ^= 0x5c;
}
md5_init (&ctx);
md5_update (&ctx, ipad, 64);
md5_update (&ctx, timestamp, strlen (timestamp));
md5_final (&ctx, digest);
md5_init (&ctx);
md5_update (&ctx, opad, 64);
md5_update (&ctx, digest, 16);
md5_final (&ctx, digest);
/* lowercase hexify that bad-boy... */
for (s = digest, p = md5asc; p < md5asc + 32; s++, p += 2)
sprintf (p, "%.2x", *s);
buf = g_strdup_printf ("%s %s", sasl_cram->username, md5asc);
enc = base64_encode_simple (buf, strlen (buf));
g_free (buf);
ret = g_byte_array_new ();
g_byte_array_append (ret, enc, strlen (enc));
g_free (enc);
break;
default:
break;
}
priv->state++;
return ret;
}
|
