diff options
Diffstat (limited to 'thirdparty/openssl/crypto/ecdsa/ecs_vrf.c')
| -rw-r--r-- | thirdparty/openssl/crypto/ecdsa/ecs_vrf.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/thirdparty/openssl/crypto/ecdsa/ecs_vrf.c b/thirdparty/openssl/crypto/ecdsa/ecs_vrf.c new file mode 100644 index 0000000000..e909aeb400 --- /dev/null +++ b/thirdparty/openssl/crypto/ecdsa/ecs_vrf.c @@ -0,0 +1,112 @@ +/* crypto/ecdsa/ecdsa_vrf.c */ +/* + * Written by Nils Larsch for the OpenSSL project + */ +/* ==================================================================== + * Copyright (c) 1998-2002 The OpenSSL Project. 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. All advertising materials mentioning features or use of this + * software must display the following acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" + * + * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to + * endorse or promote products derived from this software without + * prior written permission. For written permission, please contact + * openssl-core@OpenSSL.org. + * + * 5. Products derived from this software may not be called "OpenSSL" + * nor may "OpenSSL" appear in their names without prior written + * permission of the OpenSSL Project. + * + * 6. Redistributions of any form whatsoever must retain the following + * acknowledgment: + * "This product includes software developed by the OpenSSL Project + * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" + * + * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY + * EXPRESSED 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 OpenSSL PROJECT OR + * ITS 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. + * ==================================================================== + * + * This product includes cryptographic software written by Eric Young + * (eay@cryptsoft.com). This product includes software written by Tim + * Hudson (tjh@cryptsoft.com). + * + */ + +#include "ecs_locl.h" +#include <string.h> +#ifndef OPENSSL_NO_ENGINE +# include <openssl/engine.h> +#endif + +/*- + * returns + * 1: correct signature + * 0: incorrect signature + * -1: error + */ +int ECDSA_do_verify(const unsigned char *dgst, int dgst_len, + const ECDSA_SIG *sig, EC_KEY *eckey) +{ + ECDSA_DATA *ecdsa = ecdsa_check(eckey); + if (ecdsa == NULL) + return 0; + return ecdsa->meth->ecdsa_do_verify(dgst, dgst_len, sig, eckey); +} + +/*- + * returns + * 1: correct signature + * 0: incorrect signature + * -1: error + */ +int ECDSA_verify(int type, const unsigned char *dgst, int dgst_len, + const unsigned char *sigbuf, int sig_len, EC_KEY *eckey) +{ + ECDSA_SIG *s; + const unsigned char *p = sigbuf; + unsigned char *der = NULL; + int derlen = -1; + int ret = -1; + + s = ECDSA_SIG_new(); + if (s == NULL) + return (ret); + if (d2i_ECDSA_SIG(&s, &p, sig_len) == NULL) + goto err; + /* Ensure signature uses DER and doesn't have trailing garbage */ + derlen = i2d_ECDSA_SIG(s, &der); + if (derlen != sig_len || memcmp(sigbuf, der, derlen)) + goto err; + ret = ECDSA_do_verify(dgst, dgst_len, s, eckey); + err: + if (derlen > 0) { + OPENSSL_cleanse(der, derlen); + OPENSSL_free(der); + } + ECDSA_SIG_free(s); + return (ret); +} |