GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/dh/dh_lib.c Lines: 48 83 57.8 %
Date: 2017-11-13 Branches: 12 32 37.5 %

Line Branch Exec Source
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/* $OpenBSD: dh_lib.c,v 1.22 2017/01/29 17:49:22 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/opensslconf.h>
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#include <openssl/bn.h>
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#include <openssl/dh.h>
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#include <openssl/err.h>
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#ifndef OPENSSL_NO_ENGINE
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#include <openssl/engine.h>
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#endif
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static const DH_METHOD *default_DH_method = NULL;
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void
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DH_set_default_method(const DH_METHOD *meth)
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{
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	default_DH_method = meth;
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}
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const DH_METHOD *
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DH_get_default_method(void)
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{
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	if (!default_DH_method)
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		default_DH_method = DH_OpenSSL();
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	return default_DH_method;
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}
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int
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DH_set_method(DH *dh, const DH_METHOD *meth)
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{
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	/*
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	 * NB: The caller is specifically setting a method, so it's not up to us
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	 * to deal with which ENGINE it comes from.
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	 */
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        const DH_METHOD *mtmp;
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        mtmp = dh->meth;
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        if (mtmp->finish)
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		mtmp->finish(dh);
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#ifndef OPENSSL_NO_ENGINE
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	if (dh->engine) {
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		ENGINE_finish(dh->engine);
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		dh->engine = NULL;
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	}
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#endif
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        dh->meth = meth;
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        if (meth->init)
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		meth->init(dh);
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        return 1;
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}
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DH *
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DH_new(void)
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{
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	return DH_new_method(NULL);
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}
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DH *
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DH_new_method(ENGINE *engine)
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{
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	DH *ret;
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	ret = malloc(sizeof(DH));
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	if (ret == NULL) {
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		DHerror(ERR_R_MALLOC_FAILURE);
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		return NULL;
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	}
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	ret->meth = DH_get_default_method();
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#ifndef OPENSSL_NO_ENGINE
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	if (engine) {
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		if (!ENGINE_init(engine)) {
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			DHerror(ERR_R_ENGINE_LIB);
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			free(ret);
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			return NULL;
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		}
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		ret->engine = engine;
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	} else
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		ret->engine = ENGINE_get_default_DH();
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	if(ret->engine) {
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		ret->meth = ENGINE_get_DH(ret->engine);
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		if (!ret->meth) {
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			DHerror(ERR_R_ENGINE_LIB);
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			ENGINE_finish(ret->engine);
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			free(ret);
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			return NULL;
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		}
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	}
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#endif
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	ret->pad = 0;
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	ret->version = 0;
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	ret->p = NULL;
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	ret->g = NULL;
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	ret->length = 0;
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	ret->pub_key = NULL;
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	ret->priv_key = NULL;
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	ret->q = NULL;
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	ret->j = NULL;
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	ret->seed = NULL;
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	ret->seedlen = 0;
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	ret->counter = NULL;
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	ret->method_mont_p=NULL;
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	ret->references = 1;
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	ret->flags = ret->meth->flags & ~DH_FLAG_NON_FIPS_ALLOW;
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	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
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	if (ret->meth->init != NULL && !ret->meth->init(ret)) {
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#ifndef OPENSSL_NO_ENGINE
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		if (ret->engine)
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			ENGINE_finish(ret->engine);
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#endif
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		CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, ret, &ret->ex_data);
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		free(ret);
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		ret = NULL;
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	}
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	return ret;
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}
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void
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DH_free(DH *r)
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{
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	int i;
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	if (r == NULL)
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		return;
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	i = CRYPTO_add(&r->references, -1, CRYPTO_LOCK_DH);
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	if (i > 0)
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		return;
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	if (r->meth->finish)
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		r->meth->finish(r);
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#ifndef OPENSSL_NO_ENGINE
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	if (r->engine)
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		ENGINE_finish(r->engine);
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#endif
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	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DH, r, &r->ex_data);
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	BN_clear_free(r->p);
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	BN_clear_free(r->g);
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	BN_clear_free(r->q);
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	BN_clear_free(r->j);
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	free(r->seed);
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	BN_clear_free(r->counter);
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	BN_clear_free(r->pub_key);
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	BN_clear_free(r->priv_key);
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	free(r);
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}
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int
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DH_up_ref(DH *r)
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{
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	int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DH);
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	return i > 1 ? 1 : 0;
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}
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int
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DH_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
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    CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
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{
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	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DH, argl, argp, new_func,
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	    dup_func, free_func);
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}
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int
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DH_set_ex_data(DH *d, int idx, void *arg)
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{
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	return CRYPTO_set_ex_data(&d->ex_data, idx, arg);
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}
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void *
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DH_get_ex_data(DH *d, int idx)
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{
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	return CRYPTO_get_ex_data(&d->ex_data, idx);
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}
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int
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DH_size(const DH *dh)
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{
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	return BN_num_bytes(dh->p);
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}