2 * Copyright (c) 1997-1999 The Stanford SRP Authentication Project
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
18 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
20 * IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
21 * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
22 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
23 * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
24 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
26 * In addition, the following conditions apply:
28 * 1. Any software that incorporates the SRP authentication technology
29 * must display the following acknowlegment:
30 * "This product uses the 'Secure Remote Password' cryptographic
31 * authentication system developed by Tom Wu (tjw@CS.Stanford.EDU)."
33 * 2. Any software that incorporates all or part of the SRP distribution
34 * itself must also display the following acknowledgment:
35 * "This product includes software developed by Tom Wu and Eugene
36 * Jhong for the SRP Distribution (http://srp.stanford.edu/srp/)."
38 * 3. Redistributions in source or binary form must retain an intact copy
39 * of this copyright notice and list of conditions.
43 #include "t_defines.h"
52 struct t_preconf *tcp;
55 char username[MAXUSERLEN];
56 char hexbuf[MAXHEXPARAMLEN];
57 char buf1[MAXPARAMLEN], buf2[MAXPARAMLEN], buf3[MAXSALTLEN];
58 unsigned char cbuf[20];
63 printf("Enter username: ");
64 fgets(username, sizeof(username), stdin);
65 username[strlen(username) - 1] = '\0';
66 printf("Enter index (from server): ");
67 fgets(hexbuf, sizeof(hexbuf), stdin);
69 tcp = t_getpreparam(index - 1);
70 printf("Enter salt (from server): ");
71 fgets(hexbuf, sizeof(hexbuf), stdin);
73 s.len = t_fromb64(s.data, hexbuf);
75 tc = t_clientopen(username, &tcp->modulus, &tcp->generator, &s);
77 printf("invalid n, g\n");
81 A = t_clientgenexp(tc);
82 printf("A (to server): %s\n", t_tob64(hexbuf, A->data, A->len));
84 t_getpass(pass, 128, "Enter password:");
85 t_clientpasswd(tc, pass);
87 printf("Enter B (from server): ");
88 fgets(hexbuf, sizeof(hexbuf), stdin);
90 B.len = t_fromb64(B.data, hexbuf);
92 skey = t_clientgetkey(tc, &B);
93 printf("Session key: %s\n", t_tohex(hexbuf, skey, 40));
94 printf("Response (to server): %s\n",
95 t_tohex(hexbuf, t_clientresponse(tc), RESPONSE_LEN));
97 printf("Enter server response: ");
98 fgets(hexbuf, sizeof(hexbuf), stdin);
99 hexbuf[strlen(hexbuf) - 1] = '\0';
100 t_fromhex(cbuf, hexbuf);
102 if (t_clientverify(tc, cbuf) == 0)
103 printf("Server authentication successful.\n");
105 printf("Server authentication failed.\n");