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