1 /* $NetBSD: otp_verify.c,v 1.1.1.2 2014/04/24 12:45:51 pettai Exp $ */
2
3 /*
4 * Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
5 * (Royal Institute of Technology, Stockholm, Sweden).
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * 3. Neither the name of the Institute nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #ifdef HAVE_CONFIG_H
37 #include "config.h"
38 __RCSID("NetBSD");
39 #endif
40
41 #include "otp_locl.h"
42
43 int
otp_verify_user_1(OtpContext * ctx,const char * passwd)44 otp_verify_user_1 (OtpContext *ctx, const char *passwd)
45 {
46 OtpKey key1, key2;
47
48 if (otp_parse (key1, passwd, ctx->alg)) {
49 ctx->err = "Syntax error in reply";
50 return -1;
51 }
52 memcpy (key2, key1, sizeof(key1));
53 ctx->alg->next (key2);
54 if (memcmp (ctx->key, key2, sizeof(key2)) == 0) {
55 --ctx->n;
56 memcpy (ctx->key, key1, sizeof(key1));
57 return 0;
58 } else
59 return -1;
60 }
61
62 int
otp_verify_user(OtpContext * ctx,const char * passwd)63 otp_verify_user (OtpContext *ctx, const char *passwd)
64 {
65 void *dbm;
66 int ret;
67
68 if (!ctx->challengep)
69 return -1;
70 ret = otp_verify_user_1 (ctx, passwd);
71 dbm = otp_db_open ();
72 if (dbm == NULL) {
73 free(ctx->user);
74 return -1;
75 }
76 otp_put (dbm, ctx);
77 free(ctx->user);
78 otp_db_close (dbm);
79 return ret;
80 }
81