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/* $OpenBSD: p_verify.c,v 1.13 2017/01/29 17:49:23 beck Exp $ */ |
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
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* All rights reserved. |
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* |
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* This package is an SSL implementation written |
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* by Eric Young (eay@cryptsoft.com). |
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* The implementation was written so as to conform with Netscapes SSL. |
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* |
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* This library is free for commercial and non-commercial use as long as |
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* the following conditions are aheared to. The following conditions |
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* apply to all code found in this distribution, be it the RC4, RSA, |
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation |
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* included with this distribution is covered by the same copyright terms |
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* except that the holder is Tim Hudson (tjh@cryptsoft.com). |
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* |
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* Copyright remains Eric Young's, and as such any Copyright notices in |
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* the code are not to be removed. |
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* If this package is used in a product, Eric Young should be given attribution |
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* as the author of the parts of the library used. |
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* This can be in the form of a textual message at program startup or |
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* in documentation (online or textual) provided with the package. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. All advertising materials mentioning features or use of this software |
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* must display the following acknowledgement: |
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* "This product includes cryptographic software written by |
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* Eric Young (eay@cryptsoft.com)" |
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* The word 'cryptographic' can be left out if the rouines from the library |
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* being used are not cryptographic related :-). |
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* 4. If you include any Windows specific code (or a derivative thereof) from |
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* the apps directory (application code) you must include an acknowledgement: |
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
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* |
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* The licence and distribution terms for any publically available version or |
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* derivative of this code cannot be changed. i.e. this code cannot simply be |
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* copied and put under another distribution licence |
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* [including the GNU Public Licence.] |
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*/ |
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#include <stdio.h> |
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#include <openssl/err.h> |
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#include <openssl/evp.h> |
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#include <openssl/objects.h> |
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#include <openssl/x509.h> |
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int |
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EVP_VerifyFinal(EVP_MD_CTX *ctx, const unsigned char *sigbuf, |
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unsigned int siglen, EVP_PKEY *pkey) |
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{ |
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unsigned char m[EVP_MAX_MD_SIZE]; |
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unsigned int m_len; |
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int i = 0, ok = 0, v; |
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EVP_MD_CTX tmp_ctx; |
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EVP_PKEY_CTX *pkctx = NULL; |
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EVP_MD_CTX_init(&tmp_ctx); |
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✓✗ |
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if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx)) |
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goto err; |
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✓✗ |
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if (!EVP_DigestFinal_ex(&tmp_ctx, &(m[0]), &m_len)) |
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goto err; |
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EVP_MD_CTX_cleanup(&tmp_ctx); |
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✓✗ |
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if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) { |
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i = -1; |
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pkctx = EVP_PKEY_CTX_new(pkey, NULL); |
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✓✗ |
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if (!pkctx) |
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goto err; |
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✓✗ |
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if (EVP_PKEY_verify_init(pkctx) <= 0) |
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goto err; |
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✓✗ |
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if (EVP_PKEY_CTX_set_signature_md(pkctx, ctx->digest) <= 0) |
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goto err; |
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i = EVP_PKEY_verify(pkctx, sigbuf, siglen, m, m_len); |
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err: |
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EVP_PKEY_CTX_free(pkctx); |
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return i; |
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} |
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for (i = 0; i < 4; i++) { |
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v = ctx->digest->required_pkey_type[i]; |
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if (v == 0) |
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break; |
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if (pkey->type == v) { |
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ok = 1; |
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break; |
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} |
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} |
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if (!ok) { |
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EVPerror(EVP_R_WRONG_PUBLIC_KEY_TYPE); |
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return (-1); |
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} |
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if (ctx->digest->verify == NULL) { |
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EVPerror(EVP_R_NO_VERIFY_FUNCTION_CONFIGURED); |
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return (0); |
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} |
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return(ctx->digest->verify(ctx->digest->type, m, m_len, |
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sigbuf, siglen, pkey->pkey.ptr)); |
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} |