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
|
/*
* $Id: auth_alg.c,v 1.1 2005/06/16 13:08:34 bogdan_iancu Exp $
*
* Copyright (C) 2005 Voice Sistem SRL
*
* This file is part of openser, a free SIP server.
*
* UAC OpenSER-module 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.
*
* UAC OpenSER-module 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.
*
* History:
* ---------
* 2005-01-31 first version (ramona)
*/
#include "../../md5global.h"
#include "../../md5.h"
#include "auth_alg.h"
static inline void cvt_hex(HASH bin, HASHHEX hex)
{
unsigned short i;
unsigned char j;
for (i = 0; i<HASHLEN; i++)
{
j = (bin[i] >> 4) & 0xf;
if (j <= 9)
{
hex[i * 2] = (j + '0');
} else {
hex[i * 2] = (j + 'a' - 10);
}
j = bin[i] & 0xf;
if (j <= 9)
{
hex[i * 2 + 1] = (j + '0');
} else {
hex[i * 2 + 1] = (j + 'a' - 10);
}
};
hex[HASHHEXLEN] = '\0';
}
/*
* calculate H(A1)
*/
void uac_calc_HA1( struct uac_credential *crd,
struct authenticate_body *auth,
str* cnonce,
HASHHEX sess_key)
{
MD5_CTX Md5Ctx;
HASH HA1;
MD5Init(&Md5Ctx);
MD5Update(&Md5Ctx, crd->user.s, crd->user.len);
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, crd->realm.s, crd->realm.len);
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, crd->passwd.s, crd->passwd.len);
MD5Final(HA1, &Md5Ctx);
if ( auth->flags& AUTHENTICATE_MD5SESS )
{
MD5Init(&Md5Ctx);
MD5Update(&Md5Ctx, HA1, HASHLEN);
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, auth->nonce.s, auth->nonce.len);
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, cnonce->s, cnonce->len);
MD5Final(HA1, &Md5Ctx);
};
cvt_hex(HA1, sess_key);
}
/*
* calculate H(A2)
*/
void uac_calc_HA2( str *method, str *uri,
struct authenticate_body *auth,
HASHHEX hentity,
HASHHEX HA2Hex )
{
MD5_CTX Md5Ctx;
HASH HA2;
MD5Init(&Md5Ctx);
MD5Update(&Md5Ctx, method->s, method->len);
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, uri->s, uri->len);
if ( auth->flags&QOP_AUTH_INT)
{
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, hentity, HASHHEXLEN);
};
MD5Final(HA2, &Md5Ctx);
cvt_hex(HA2, HA2Hex);
}
/*
* calculate request-digest/response-digest as per HTTP Digest spec
*/
void uac_calc_response( HASHHEX ha1, HASHHEX ha2,
struct authenticate_body *auth,
str* nc, str* cnonce,
HASHHEX response)
{
MD5_CTX Md5Ctx;
HASH RespHash;
MD5Init(&Md5Ctx);
MD5Update(&Md5Ctx, ha1, HASHHEXLEN);
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, auth->nonce.s, auth->nonce.len);
MD5Update(&Md5Ctx, ":", 1);
if ( auth->qop.len)
{
MD5Update(&Md5Ctx, nc->s, nc->len);
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, cnonce->s, cnonce->len);
MD5Update(&Md5Ctx, ":", 1);
MD5Update(&Md5Ctx, auth->qop.s, auth->qop.len);
MD5Update(&Md5Ctx, ":", 1);
};
MD5Update(&Md5Ctx, ha2, HASHHEXLEN);
MD5Final(RespHash, &Md5Ctx);
cvt_hex(RespHash, response);
}
|
