GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/evp/p_sign.c Lines: 20 33 60.6 %
Date: 2017-11-07 Branches: 7 24 29.2 %

Line Branch Exec Source
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/* $OpenBSD: p_sign.c,v 1.14 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_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret, unsigned int *siglen,
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    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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	*siglen = 0;
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	EVP_MD_CTX_init(&tmp_ctx);
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	if (!EVP_MD_CTX_copy_ex(&tmp_ctx, ctx))
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		goto err;
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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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	if (ctx->digest->flags & EVP_MD_FLAG_PKEY_METHOD_SIGNATURE) {
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		size_t sltmp = (size_t)EVP_PKEY_size(pkey);
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		i = 0;
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		pkctx = EVP_PKEY_CTX_new(pkey, NULL);
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		if (!pkctx)
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			goto err;
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		if (EVP_PKEY_sign_init(pkctx) <= 0)
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			goto err;
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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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		if (EVP_PKEY_sign(pkctx, sigret, &sltmp, m, m_len) <= 0)
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			goto err;
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		*siglen = sltmp;
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		i = 1;
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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 (0);
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	}
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	if (ctx->digest->sign == NULL) {
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		EVPerror(EVP_R_NO_SIGN_FUNCTION_CONFIGURED);
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		return (0);
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	}
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	return(ctx->digest->sign(ctx->digest->type, m, m_len, sigret, siglen,
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	    pkey->pkey.ptr));
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}