1*2139Sjp161948 /* crypto/ecdsa/ecdsa_vrf.c */
2*2139Sjp161948 /*
3*2139Sjp161948 * Written by Nils Larsch for the OpenSSL project
4*2139Sjp161948 */
5*2139Sjp161948 /* ====================================================================
6*2139Sjp161948 * Copyright (c) 1998-2002 The OpenSSL Project. All rights reserved.
7*2139Sjp161948 *
8*2139Sjp161948 * Redistribution and use in source and binary forms, with or without
9*2139Sjp161948 * modification, are permitted provided that the following conditions
10*2139Sjp161948 * are met:
11*2139Sjp161948 *
12*2139Sjp161948 * 1. Redistributions of source code must retain the above copyright
13*2139Sjp161948 * notice, this list of conditions and the following disclaimer.
14*2139Sjp161948 *
15*2139Sjp161948 * 2. Redistributions in binary form must reproduce the above copyright
16*2139Sjp161948 * notice, this list of conditions and the following disclaimer in
17*2139Sjp161948 * the documentation and/or other materials provided with the
18*2139Sjp161948 * distribution.
19*2139Sjp161948 *
20*2139Sjp161948 * 3. All advertising materials mentioning features or use of this
21*2139Sjp161948 * software must display the following acknowledgment:
22*2139Sjp161948 * "This product includes software developed by the OpenSSL Project
23*2139Sjp161948 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24*2139Sjp161948 *
25*2139Sjp161948 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26*2139Sjp161948 * endorse or promote products derived from this software without
27*2139Sjp161948 * prior written permission. For written permission, please contact
28*2139Sjp161948 * openssl-core@OpenSSL.org.
29*2139Sjp161948 *
30*2139Sjp161948 * 5. Products derived from this software may not be called "OpenSSL"
31*2139Sjp161948 * nor may "OpenSSL" appear in their names without prior written
32*2139Sjp161948 * permission of the OpenSSL Project.
33*2139Sjp161948 *
34*2139Sjp161948 * 6. Redistributions of any form whatsoever must retain the following
35*2139Sjp161948 * acknowledgment:
36*2139Sjp161948 * "This product includes software developed by the OpenSSL Project
37*2139Sjp161948 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38*2139Sjp161948 *
39*2139Sjp161948 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40*2139Sjp161948 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41*2139Sjp161948 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42*2139Sjp161948 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
43*2139Sjp161948 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44*2139Sjp161948 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45*2139Sjp161948 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46*2139Sjp161948 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47*2139Sjp161948 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48*2139Sjp161948 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49*2139Sjp161948 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50*2139Sjp161948 * OF THE POSSIBILITY OF SUCH DAMAGE.
51*2139Sjp161948 * ====================================================================
52*2139Sjp161948 *
53*2139Sjp161948 * This product includes cryptographic software written by Eric Young
54*2139Sjp161948 * (eay@cryptsoft.com). This product includes software written by Tim
55*2139Sjp161948 * Hudson (tjh@cryptsoft.com).
56*2139Sjp161948 *
57*2139Sjp161948 */
58*2139Sjp161948
59*2139Sjp161948 #include "ecs_locl.h"
60*2139Sjp161948 #ifndef OPENSSL_NO_ENGINE
61*2139Sjp161948 #include <openssl/engine.h>
62*2139Sjp161948 #endif
63*2139Sjp161948
64*2139Sjp161948 /* returns
65*2139Sjp161948 * 1: correct signature
66*2139Sjp161948 * 0: incorrect signature
67*2139Sjp161948 * -1: error
68*2139Sjp161948 */
ECDSA_do_verify(const unsigned char * dgst,int dgst_len,const ECDSA_SIG * sig,EC_KEY * eckey)69*2139Sjp161948 int ECDSA_do_verify(const unsigned char *dgst, int dgst_len,
70*2139Sjp161948 const ECDSA_SIG *sig, EC_KEY *eckey)
71*2139Sjp161948 {
72*2139Sjp161948 ECDSA_DATA *ecdsa = ecdsa_check(eckey);
73*2139Sjp161948 if (ecdsa == NULL)
74*2139Sjp161948 return 0;
75*2139Sjp161948 return ecdsa->meth->ecdsa_do_verify(dgst, dgst_len, sig, eckey);
76*2139Sjp161948 }
77*2139Sjp161948
78*2139Sjp161948 /* returns
79*2139Sjp161948 * 1: correct signature
80*2139Sjp161948 * 0: incorrect signature
81*2139Sjp161948 * -1: error
82*2139Sjp161948 */
ECDSA_verify(int type,const unsigned char * dgst,int dgst_len,const unsigned char * sigbuf,int sig_len,EC_KEY * eckey)83*2139Sjp161948 int ECDSA_verify(int type, const unsigned char *dgst, int dgst_len,
84*2139Sjp161948 const unsigned char *sigbuf, int sig_len, EC_KEY *eckey)
85*2139Sjp161948 {
86*2139Sjp161948 ECDSA_SIG *s;
87*2139Sjp161948 int ret=-1;
88*2139Sjp161948
89*2139Sjp161948 s = ECDSA_SIG_new();
90*2139Sjp161948 if (s == NULL) return(ret);
91*2139Sjp161948 if (d2i_ECDSA_SIG(&s, &sigbuf, sig_len) == NULL) goto err;
92*2139Sjp161948 ret=ECDSA_do_verify(dgst, dgst_len, s, eckey);
93*2139Sjp161948 err:
94*2139Sjp161948 ECDSA_SIG_free(s);
95*2139Sjp161948 return(ret);
96*2139Sjp161948 }
97