1 /* $NetBSD: otp_verify.c,v 1.1.1.1 2011/04/13 18:15:40 elric 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: otp_verify.c,v 1.1.1.1 2011/04/13 18:15:40 elric Exp $"); 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 } 81