2 * Copyright (c) 2005-2008 Daniel Braniss <danny@cs.huji.ac.il>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 | $Id: auth_subr.c,v 2.2 2007/06/01 08:09:37 danny Exp $
32 #include <sys/param.h>
33 #include <sys/types.h>
34 #include <sys/socket.h>
35 #include <sys/sysctl.h>
37 #include <netinet/in.h>
38 #include <netinet/tcp.h>
39 #include <arpa/inet.h>
50 #include "iscontrol.h"
53 chapMD5(char id, char *cp, char *chapSecret, unsigned char *digest)
63 MD5Update(&ctx, &id, 1);
65 if((len = str2bin(chapSecret, &tmp)) == 0) {
69 MD5Update(&ctx, tmp, len);
72 if((len = str2bin(cp, &tmp)) == 0) {
76 MD5Update(&ctx, tmp, len);
79 MD5Final(digest, &ctx);
86 chapSHA1(char id, char *cp, char *chapSecret, unsigned char *digest)
96 SHA1_Update(&ctx, &id, 1);
98 if((len = str2bin(chapSecret, &tmp)) == 0) {
102 SHA1_Update(&ctx, tmp, len);
105 if((len = str2bin(cp, &tmp)) == 0) {
109 SHA1_Update(&ctx, tmp, len);
112 SHA1_Final(digest, &ctx);
118 | the input text format can be anything that the rfc3270 defines
119 | (see section 5.1 and str2bin)
120 | digest length for md5 is 128bits, and for sha1 is 160bits.
121 | digest is an ASCII string which represents the bits in
122 | hexadecimal or base64 according to the challenge(cp) format
125 chapDigest(char *ap, char id, char *cp, char *chapSecret)
128 unsigned char digest[20];
134 if(strcmp(ap, "5") == 0 && chapMD5(id, cp, chapSecret, digest) == 0)
137 if(strcmp(ap, "7") == 0 && chapSHA1(id, cp, chapSecret, digest) == 0)
141 sprintf(encoding, "%.2s", cp);
142 return bin2str(encoding, digest, len);
149 genChapChallenge(char *encoding, size_t len)
152 unsigned char tmp[1024];
154 if(len > sizeof(tmp))
157 if((fd = open("/dev/random", O_RDONLY)) != -1) {
160 return bin2str(encoding, tmp, len);
162 perror("/dev/random");
163 // make up something ...
169 puke(char *str, unsigned char *dg, int len)
171 printf("%3d] %s\n 0x", len, str);
173 printf("%02x", *dg++);
177 main(int cc, char **vv)
179 char *p, *ap, *ip, *cp, *chapSecret, *digest;
184 chapSecret = "0xa5aff013dd839b1edd31ee73a1df0b1b";
185 // chapSecret = "abcdefghijklmnop";
186 len = str2bin(chapSecret, &cp);
187 puke(chapSecret, cp, len);
193 if((digest = chapDigest(ap, ip, cp, chapSecret)) != NULL) {
194 len = str2bin(digest, &cp);
195 puke(digest, cp, len);
198 printf("%d] %s\n", 24, genChallenge("0X", 24));