1 /* $NetBSD: otp_challenge.c,v 1.2 2017/01/28 21:31:50 christos Exp $ */
2
3 /*
4 * Copyright (c) 1995, 1996, 1997 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: otp_challenge.c,v 1.2 2017/01/28 21:31:50 christos Exp $");
39 #endif
40
41 #include "otp_locl.h"
42
43 int
otp_challenge(OtpContext * ctx,char * user,char * str,size_t len)44 otp_challenge (OtpContext *ctx, char *user, char *str, size_t len)
45 {
46 void *dbm;
47 int ret;
48
49 ctx->challengep = 0;
50 ctx->err = NULL;
51 ctx->user = strdup(user);
52 if (ctx->user == NULL) {
53 ctx->err = "Out of memory";
54 return -1;
55 }
56 dbm = otp_db_open ();
57 if (dbm == NULL) {
58 ctx->err = "Cannot open database";
59 return -1;
60 }
61 ret = otp_get (dbm, ctx);
62 otp_db_close (dbm);
63 if (ret)
64 return ret;
65 snprintf (str, len,
66 "[ otp-%s %u %s ]",
67 ctx->alg->name, ctx->n-1, ctx->seed);
68 ctx->challengep = 1;
69 return 0;
70 }
71