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. 855714Skris * 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). 1555714Skris * 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. 2255714Skris * 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 :-). 3755714Skris * 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)" 4055714Skris * 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. 5255714Skris * 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, 6655714Skris unsigned int siglen, EVP_PKEY *pkey) 6755714Skris { 6855714Skris unsigned char m[EVP_MAX_MD_SIZE]; 6955714Skris unsigned int m_len; 70246772Sjkim int i = 0,ok = 0,v; 71216166Ssimon EVP_MD_CTX tmp_ctx; 72238405Sjkim EVP_PKEY_CTX *pkctx = NULL; 7355714Skris 74238405Sjkim EVP_MD_CTX_init(&tmp_ctx); 75238405Sjkim if (!EVP_MD_CTX_copy_ex(&tmp_ctx,ctx)) 76238405Sjkim goto err; 77238405Sjkim if (!EVP_DigestFinal_ex(&tmp_ctx,&(m[0]),&m_len)) 78238405Sjkim goto err; 79238405Sjkim EVP_MD_CTX_cleanup(&tmp_ctx); 80238405Sjkim 81238405Sjkim if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) 82238405Sjkim { 83238405Sjkim i = -1; 84238405Sjkim pkctx = EVP_PKEY_CTX_new(pkey, NULL); 85238405Sjkim if (!pkctx) 86238405Sjkim goto err; 87238405Sjkim if (EVP_PKEY_verify_init(pkctx) <= 0) 88238405Sjkim goto err; 89238405Sjkim if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0) 90238405Sjkim goto err; 91238405Sjkim i = EVP_PKEY_verify(pkctx, sigbuf, siglen, m, m_len); 92238405Sjkim err: 93238405Sjkim EVP_PKEY_CTX_free(pkctx); 94238405Sjkim return i; 95238405Sjkim } 96238405Sjkim 9755714Skris for (i=0; i<4; i++) 9855714Skris { 9955714Skris v=ctx->digest->required_pkey_type[i]; 10055714Skris if (v == 0) break; 10155714Skris if (pkey->type == v) 10255714Skris { 10355714Skris ok=1; 10455714Skris break; 10555714Skris } 10655714Skris } 10755714Skris if (!ok) 10855714Skris { 10955714Skris EVPerr(EVP_F_EVP_VERIFYFINAL,EVP_R_WRONG_PUBLIC_KEY_TYPE); 11055714Skris return(-1); 11155714Skris } 112238405Sjkim if (ctx->digest->verify == NULL) 11355714Skris { 11455714Skris EVPerr(EVP_F_EVP_VERIFYFINAL,EVP_R_NO_VERIFY_FUNCTION_CONFIGURED); 11555714Skris return(0); 11655714Skris } 11755714Skris 118238405Sjkim return(ctx->digest->verify(ctx->digest->type,m,m_len, 119238405Sjkim sigbuf,siglen,pkey->pkey.ptr)); 12055714Skris } 12155714Skris 122