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/*
* Copyright (c) 1995 - 2000 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
RCSID("$Id$");
#endif
#include "otp_locl.h"
int
otp_verify_user_1 (OtpContext *ctx, const char *passwd)
{
OtpKey key1, key2;
if (otp_parse (key1, passwd, ctx->alg)) {
ctx->err = "Syntax error in reply";
return -1;
}
memcpy (key2, key1, sizeof(key1));
ctx->alg->next (key2);
if (memcmp (ctx->key, key2, sizeof(key2)) == 0) {
--ctx->n;
memcpy (ctx->key, key1, sizeof(key1));
return 0;
} else
return -1;
}
int
otp_verify_user (OtpContext *ctx, const char *passwd)
{
void *dbm;
int ret;
if (!ctx->challengep)
return -1;
ret = otp_verify_user_1 (ctx, passwd);
dbm = otp_db_open ();
if (dbm == NULL) {
free(ctx->user);
return -1;
}
otp_put (dbm, ctx);
free(ctx->user);
otp_db_close (dbm);
return ret;
}
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