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

   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
  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
  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 }