GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcrypto/dsa/dsa_lib.c Lines: 58 108 53.7 %
Date: 2017-11-13 Branches: 12 56 21.4 %

Line Branch Exec Source
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/* $OpenBSD: dsa_lib.c,v 1.23 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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/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
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#include <stdio.h>
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#include <openssl/opensslconf.h>
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#include <openssl/asn1.h>
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#include <openssl/bn.h>
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#include <openssl/dsa.h>
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#include <openssl/err.h>
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#ifndef OPENSSL_NO_DH
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#include <openssl/dh.h>
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#endif
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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 DSA_METHOD *default_DSA_method = NULL;
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void
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DSA_set_default_method(const DSA_METHOD *meth)
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{
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	default_DSA_method = meth;
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}
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const DSA_METHOD *
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DSA_get_default_method(void)
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{
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92
	if (!default_DSA_method)
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30
		default_DSA_method = DSA_OpenSSL();
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	return default_DSA_method;
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}
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DSA *
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DSA_new(void)
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{
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	return DSA_new_method(NULL);
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}
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int
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DSA_set_method(DSA *dsa, const DSA_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 DSA_METHOD *mtmp;
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        mtmp = dsa->meth;
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        if (mtmp->finish)
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		mtmp->finish(dsa);
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#ifndef OPENSSL_NO_ENGINE
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	if (dsa->engine) {
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		ENGINE_finish(dsa->engine);
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		dsa->engine = NULL;
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	}
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#endif
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        dsa->meth = meth;
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        if (meth->init)
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		meth->init(dsa);
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        return 1;
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}
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DSA *
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DSA_new_method(ENGINE *engine)
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{
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	DSA *ret;
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	ret = malloc(sizeof(DSA));
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	if (ret == NULL) {
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		DSAerror(ERR_R_MALLOC_FAILURE);
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		return NULL;
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	}
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	ret->meth = DSA_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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			DSAerror(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_DSA();
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	if (ret->engine) {
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		ret->meth = ENGINE_get_DSA(ret->engine);
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		if (!ret->meth) {
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			DSAerror(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->write_params = 1;
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	ret->p = NULL;
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	ret->q = NULL;
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	ret->g = NULL;
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	ret->pub_key = NULL;
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	ret->priv_key = NULL;
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	ret->kinv = NULL;
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	ret->r = NULL;
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	ret->method_mont_p = NULL;
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168
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	ret->references = 1;
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	ret->flags = ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
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	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, 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_DSA, 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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DSA_free(DSA *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_DSA);
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	if (i > 0)
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		return;
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196
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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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46
	if (r->engine)
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		ENGINE_finish(r->engine);
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#endif
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203
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	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
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205
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	BN_clear_free(r->p);
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	BN_clear_free(r->q);
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	BN_clear_free(r->g);
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	BN_clear_free(r->pub_key);
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	BN_clear_free(r->priv_key);
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	BN_clear_free(r->kinv);
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	BN_clear_free(r->r);
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	free(r);
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102
}
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215
int
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DSA_up_ref(DSA *r)
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{
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	int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA);
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	return i > 1 ? 1 : 0;
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}
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int
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DSA_size(const DSA *r)
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{
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	int ret, i;
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8
	ASN1_INTEGER bs;
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4
	unsigned char buf[4];	/* 4 bytes looks really small.
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				   However, i2d_ASN1_INTEGER() will not look
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				   beyond the first byte, as long as the second
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				   parameter is NULL. */
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	i = BN_num_bits(r->q);
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4
	bs.length = (i + 7) / 8;
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	bs.data = buf;
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	bs.type = V_ASN1_INTEGER;
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	/* If the top bit is set the asn1 encoding is 1 larger. */
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	buf[0] = 0xff;
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239
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	i = i2d_ASN1_INTEGER(&bs, NULL);
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	i += i; /* r and s */
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	ret = ASN1_object_size(1, i, V_ASN1_SEQUENCE);
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	return ret;
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4
}
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int
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DSA_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_DSA, argl, argp,
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	    new_func, dup_func, free_func);
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}
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int
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DSA_set_ex_data(DSA *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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DSA_get_ex_data(DSA *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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#ifndef OPENSSL_NO_DH
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DH *
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DSA_dup_DH(const DSA *r)
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{
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	/*
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	 * DSA has p, q, g, optional pub_key, optional priv_key.
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	 * DH has p, optional length, g, optional pub_key, optional priv_key,
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	 * optional q.
273
	 */
274
	DH *ret = NULL;
275
276
	if (r == NULL)
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		goto err;
278
	ret = DH_new();
279
	if (ret == NULL)
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		goto err;
281
	if (r->p != NULL)
282
		if ((ret->p = BN_dup(r->p)) == NULL)
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			goto err;
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	if (r->q != NULL) {
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		ret->length = BN_num_bits(r->q);
286
		if ((ret->q = BN_dup(r->q)) == NULL)
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			goto err;
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	}
289
	if (r->g != NULL)
290
		if ((ret->g = BN_dup(r->g)) == NULL)
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			goto err;
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	if (r->pub_key != NULL)
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		if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
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			goto err;
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	if (r->priv_key != NULL)
296
		if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
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			goto err;
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	return ret;
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301
err:
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	DH_free(ret);
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	return NULL;
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}
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#endif