155714Skris/* crypto/evp/p_verify.c */ 255714Skris/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) 355714Skris * All rights reserved. 455714Skris * 555714Skris * This package is an SSL implementation written 655714Skris * by Eric Young (eay@cryptsoft.com). 755714Skris * The implementation was written so as to conform with Netscapes SSL. 8280304Sjkim * 955714Skris * This library is free for commercial and non-commercial use as long as 1055714Skris * the following conditions are aheared to. The following conditions 1155714Skris * apply to all code found in this distribution, be it the RC4, RSA, 1255714Skris * lhash, DES, etc., code; not just the SSL code. The SSL documentation 1355714Skris * included with this distribution is covered by the same copyright terms 1455714Skris * except that the holder is Tim Hudson (tjh@cryptsoft.com). 15280304Sjkim * 1655714Skris * Copyright remains Eric Young's, and as such any Copyright notices in 1755714Skris * the code are not to be removed. 1855714Skris * If this package is used in a product, Eric Young should be given attribution 1955714Skris * as the author of the parts of the library used. 2055714Skris * This can be in the form of a textual message at program startup or 2155714Skris * in documentation (online or textual) provided with the package. 22280304Sjkim * 2355714Skris * Redistribution and use in source and binary forms, with or without 2455714Skris * modification, are permitted provided that the following conditions 2555714Skris * are met: 2655714Skris * 1. Redistributions of source code must retain the copyright 2755714Skris * notice, this list of conditions and the following disclaimer. 2855714Skris * 2. Redistributions in binary form must reproduce the above copyright 2955714Skris * notice, this list of conditions and the following disclaimer in the 3055714Skris * documentation and/or other materials provided with the distribution. 3155714Skris * 3. All advertising materials mentioning features or use of this software 3255714Skris * must display the following acknowledgement: 3355714Skris * "This product includes cryptographic software written by 3455714Skris * Eric Young (eay@cryptsoft.com)" 3555714Skris * The word 'cryptographic' can be left out if the rouines from the library 3655714Skris * being used are not cryptographic related :-). 37280304Sjkim * 4. If you include any Windows specific code (or a derivative thereof) from 3855714Skris * the apps directory (application code) you must include an acknowledgement: 3955714Skris * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" 40280304Sjkim * 4155714Skris * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 4255714Skris * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4355714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 4455714Skris * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 4555714Skris * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4655714Skris * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4755714Skris * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4955714Skris * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 5055714Skris * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 5155714Skris * SUCH DAMAGE. 52280304Sjkim * 5355714Skris * The licence and distribution terms for any publically available version or 5455714Skris * derivative of this code cannot be changed. i.e. this code cannot simply be 5555714Skris * copied and put under another distribution licence 5655714Skris * [including the GNU Public Licence.] 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 6155714Skris#include <openssl/evp.h> 6255714Skris#include <openssl/objects.h> 6355714Skris#include <openssl/x509.h> 6455714Skris 65160814Ssimonint EVP_VerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sigbuf, 66280304Sjkim unsigned int siglen, EVP_PKEY *pkey) 67280304Sjkim{ 68280304Sjkim unsigned char m[EVP_MAX_MD_SIZE]; 69280304Sjkim unsigned int m_len; 70280304Sjkim int i = 0, ok = 0, v; 71280304Sjkim EVP_MD_CTX tmp_ctx; 72280304Sjkim EVP_PKEY_CTX *pkctx = NULL; 7355714Skris 74280304Sjkim EVP_MD_CTX_init(&tmp_ctx); 75280304Sjkim if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx)) 76280304Sjkim goto err; 77280304Sjkim if (!EVP_DigestFinal_ex(&tmp_ctx, &(m[0]), &m_len)) 78280304Sjkim goto err; 79280304Sjkim EVP_MD_CTX_cleanup(&tmp_ctx); 80238405Sjkim 81280304Sjkim if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) { 82280304Sjkim i = -1; 83280304Sjkim pkctx = EVP_PKEY_CTX_new(pkey, NULL); 84280304Sjkim if (!pkctx) 85280304Sjkim goto err; 86280304Sjkim if (EVP_PKEY_verify_init(pkctx) <= 0) 87280304Sjkim goto err; 88280304Sjkim if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0) 89280304Sjkim goto err; 90280304Sjkim i = EVP_PKEY_verify(pkctx, sigbuf, siglen, m, m_len); 91280304Sjkim err: 92280304Sjkim EVP_PKEY_CTX_free(pkctx); 93280304Sjkim return i; 94280304Sjkim } 95238405Sjkim 96280304Sjkim for (i = 0; i < 4; i++) { 97280304Sjkim v = ctx->digest->required_pkey_type[i]; 98280304Sjkim if (v == 0) 99280304Sjkim break; 100280304Sjkim if (pkey->type == v) { 101280304Sjkim ok = 1; 102280304Sjkim break; 103280304Sjkim } 104280304Sjkim } 105280304Sjkim if (!ok) { 106280304Sjkim EVPerr(EVP_F_EVP_VERIFYFINAL, EVP_R_WRONG_PUBLIC_KEY_TYPE); 107280304Sjkim return (-1); 108280304Sjkim } 109280304Sjkim if (ctx->digest->verify == NULL) { 110280304Sjkim EVPerr(EVP_F_EVP_VERIFYFINAL, EVP_R_NO_VERIFY_FUNCTION_CONFIGURED); 111280304Sjkim return (0); 112280304Sjkim } 11355714Skris 114280304Sjkim return (ctx->digest->verify(ctx->digest->type, m, m_len, 115280304Sjkim sigbuf, siglen, pkey->pkey.ptr)); 116280304Sjkim} 117