1 /* crypto/ecdsa/ecdsa_vrf.c */ 2 /* 3 * Written by Nils Larsch for the OpenSSL project 4 */ 5 /* ==================================================================== 6 * Copyright (c) 1998-2002 The OpenSSL Project. 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 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * openssl-core (at) OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay (at) cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh (at) cryptsoft.com). 56 * 57 */ 58 59 #include "ecs_locl.h" 60 #ifndef OPENSSL_NO_ENGINE 61 #include <openssl/engine.h> 62 #endif 63 64 /* returns 65 * 1: correct signature 66 * 0: incorrect signature 67 * -1: error 68 */ 69 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len, 70 const ECDSA_SIG *sig, EC_KEY *eckey) 71 { 72 ECDSA_DATA *ecdsa = ecdsa_check(eckey); 73 if (ecdsa == NULL) 74 return 0; 75 return ecdsa->meth->ecdsa_do_verify(dgst, dgst_len, sig, eckey); 76 } 77 78 /* returns 79 * 1: correct signature 80 * 0: incorrect signature 81 * -1: error 82 */ 83 int ECDSA_verify(int type, const unsigned char *dgst, int dgst_len, 84 const unsigned char *sigbuf, int sig_len, EC_KEY *eckey) 85 { 86 ECDSA_SIG *s; 87 int ret=-1; 88 89 s = ECDSA_SIG_new(); 90 if (s == NULL) return(ret); 91 if (d2i_ECDSA_SIG(&s, &sigbuf, sig_len) == NULL) goto err; 92 ret=ECDSA_do_verify(dgst, dgst_len, s, eckey); 93 err: 94 ECDSA_SIG_free(s); 95 return(ret); 96 } 97
