crypto/external/bsd/heimdal/dist/lib/otp/otp_challenge.c

   1 /*      $NetBSD: otp_challenge.c,v 1.1.1.2 2014/04/24 12:45:51 pettai 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");
  39 #endif
  40
  41 #include "otp_locl.h"
  42
  43 int
  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 }