[thirdparty/openssl.git] / crypto / dsa / dsa_lib.c

/* crypto/dsa/dsa_lib.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 * 
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 * 
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from 
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 * 
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * 
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */

/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/bn.h>
#include <openssl/dsa.h>
#include <openssl/asn1.h>
#ifndef OPENSSL_NO_ENGINE
#include <openssl/engine.h>
#endif
#ifndef OPENSSL_NO_DH
#include <openssl/dh.h>
#endif

const char DSA_version[]="DSA" OPENSSL_VERSION_PTEXT;

static const DSA_METHOD *default_DSA_method = NULL;

void DSA_set_default_method(const DSA_METHOD *meth)
	{
	default_DSA_method = meth;
	}

const DSA_METHOD *DSA_get_default_method(void)
	{
	if(!default_DSA_method)
		default_DSA_method = DSA_OpenSSL();
	return default_DSA_method;
	}

DSA *DSA_new(void)
	{
	return DSA_new_method(NULL);
	}

int DSA_set_method(DSA *dsa, const DSA_METHOD *meth)
	{
	/* NB: The caller is specifically setting a method, so it's not up to us
	 * to deal with which ENGINE it comes from. */
        const DSA_METHOD *mtmp;
        mtmp = dsa->meth;
        if (mtmp->finish) mtmp->finish(dsa);
#ifndef OPENSSL_NO_ENGINE
	if (dsa->engine)
		{
		ENGINE_finish(dsa->engine);
		dsa->engine = NULL;
		}
#endif
        dsa->meth = meth;
        if (meth->init) meth->init(dsa);
        return 1;
	}

DSA *DSA_new_method(ENGINE *engine)
	{
	DSA *ret;

	ret=(DSA *)OPENSSL_malloc(sizeof(DSA));
	if (ret == NULL)
		{
		DSAerr(DSA_F_DSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
		return(NULL);
		}
	ret->meth = DSA_get_default_method();
#ifndef OPENSSL_NO_ENGINE
	if (engine)
		{
		if (!ENGINE_init(engine))
			{
			DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
			OPENSSL_free(ret);
			return NULL;
			}
		ret->engine = engine;
		}
	else
		ret->engine = ENGINE_get_default_DSA();
	if(ret->engine)
		{
		ret->meth = ENGINE_get_DSA(ret->engine);
		if(!ret->meth)
			{
			DSAerr(DSA_F_DSA_NEW_METHOD,
				ERR_R_ENGINE_LIB);
			ENGINE_finish(ret->engine);
			OPENSSL_free(ret);
			return NULL;
			}
		}
#endif

	ret->pad=0;
	ret->version=0;
	ret->write_params=1;
	ret->p=NULL;
	ret->q=NULL;
	ret->g=NULL;

	ret->pub_key=NULL;
	ret->priv_key=NULL;

	ret->kinv=NULL;
	ret->r=NULL;
	ret->method_mont_p=NULL;

	ret->references=1;
	ret->flags=ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
	if ((ret->meth->init != NULL) && !ret->meth->init(ret))
		{
#ifndef OPENSSL_NO_ENGINE
		if (ret->engine)
			ENGINE_finish(ret->engine);
#endif
		CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
		OPENSSL_free(ret);
		ret=NULL;
		}
	
	return(ret);
	}

void DSA_free(DSA *r)
	{
	int i;

	if (r == NULL) return;

	i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
#ifdef REF_PRINT
	REF_PRINT("DSA",r);
#endif
	if (i > 0) return;
#ifdef REF_CHECK
	if (i < 0)
		{
		fprintf(stderr,"DSA_free, bad reference count\n");
		abort();
		}
#endif

	if(r->meth->finish)
		r->meth->finish(r);
#ifndef OPENSSL_NO_ENGINE
	if(r->engine)
		ENGINE_finish(r->engine);
#endif

	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);

	if (r->p != NULL) BN_clear_free(r->p);
	if (r->q != NULL) BN_clear_free(r->q);
	if (r->g != NULL) BN_clear_free(r->g);
	if (r->pub_key != NULL) BN_clear_free(r->pub_key);
	if (r->priv_key != NULL) BN_clear_free(r->priv_key);
	if (r->kinv != NULL) BN_clear_free(r->kinv);
	if (r->r != NULL) BN_clear_free(r->r);
	OPENSSL_free(r);
	}

int DSA_up_ref(DSA *r)
	{
	int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA);
#ifdef REF_PRINT
	REF_PRINT("DSA",r);
#endif
#ifdef REF_CHECK
	if (i < 2)
		{
		fprintf(stderr, "DSA_up_ref, bad reference count\n");
		abort();
		}
#endif
	return ((i > 1) ? 1 : 0);
	}

int DSA_size(const DSA *r)
	{
	int ret,i;
	ASN1_INTEGER bs;
	unsigned char buf[4];	/* 4 bytes looks really small.
				   However, i2d_ASN1_INTEGER() will not look
				   beyond the first byte, as long as the second
				   parameter is NULL. */

	i=BN_num_bits(r->q);
	bs.length=(i+7)/8;
	bs.data=buf;
	bs.type=V_ASN1_INTEGER;
	/* If the top bit is set the asn1 encoding is 1 larger. */
	buf[0]=0xff;	

	i=i2d_ASN1_INTEGER(&bs,NULL);
	i+=i; /* r and s */
	ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
	return(ret);
	}

int DSA_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
        {
	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, argl, argp,
				new_func, dup_func, free_func);
        }

int DSA_set_ex_data(DSA *d, int idx, void *arg)
	{
	return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
	}

void *DSA_get_ex_data(DSA *d, int idx)
	{
	return(CRYPTO_get_ex_data(&d->ex_data,idx));
	}

int DSA_security_bits(const DSA *d)
	{
	return BN_security_bits(BN_num_bits(d->p), BN_num_bits(d->q));
	}

#ifndef OPENSSL_NO_DH
DH *DSA_dup_DH(const DSA *r)
	{
	/* DSA has p, q, g, optional pub_key, optional priv_key.
	 * DH has p, optional length, g, optional pub_key, optional priv_key,
	 * optional q.
	 */ 

	DH *ret = NULL;

	if (r == NULL)
		goto err;
	ret = DH_new();
	if (ret == NULL)
		goto err;
	if (r->p != NULL) 
		if ((ret->p = BN_dup(r->p)) == NULL)
			goto err;
	if (r->q != NULL)
		{
		ret->length = BN_num_bits(r->q);
		if ((ret->q = BN_dup(r->q)) == NULL)
			goto err;
		}
	if (r->g != NULL)
		if ((ret->g = BN_dup(r->g)) == NULL)
			goto err;
	if (r->pub_key != NULL)
		if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
			goto err;
	if (r->priv_key != NULL)
		if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
			goto err;

	return ret;

 err:
	if (ret != NULL)
		DH_free(ret);
	return NULL;
	}
#endif
Commit	Line	Data
d02b48c6	1	/* crypto/dsa/dsa_lib.c */
58964a49	2	/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
d02b48c6 RE	3	* All rights reserved.
	4	*
	5	* This package is an SSL implementation written
	6	* by Eric Young (eay@cryptsoft.com).
	7	* The implementation was written so as to conform with Netscapes SSL.
	8	*
	9	* This library is free for commercial and non-commercial use as long as
	10	* the following conditions are aheared to. The following conditions
	11	* apply to all code found in this distribution, be it the RC4, RSA,
	12	* lhash, DES, etc., code; not just the SSL code. The SSL documentation
	13	* included with this distribution is covered by the same copyright terms
	14	* except that the holder is Tim Hudson (tjh@cryptsoft.com).
	15	*
	16	* Copyright remains Eric Young's, and as such any Copyright notices in
	17	* the code are not to be removed.
	18	* If this package is used in a product, Eric Young should be given attribution
	19	* as the author of the parts of the library used.
	20	* This can be in the form of a textual message at program startup or
	21	* in documentation (online or textual) provided with the package.
	22	*
	23	* Redistribution and use in source and binary forms, with or without
	24	* modification, are permitted provided that the following conditions
	25	* are met:
	26	* 1. Redistributions of source code must retain the copyright
	27	* notice, this list of conditions and the following disclaimer.
	28	* 2. Redistributions in binary form must reproduce the above copyright
	29	* notice, this list of conditions and the following disclaimer in the
	30	* documentation and/or other materials provided with the distribution.
	31	* 3. All advertising materials mentioning features or use of this software
	32	* must display the following acknowledgement:
	33	* "This product includes cryptographic software written by
	34	* Eric Young (eay@cryptsoft.com)"
	35	* The word 'cryptographic' can be left out if the rouines from the library
	36	* being used are not cryptographic related :-).
	37	* 4. If you include any Windows specific code (or a derivative thereof) from
	38	* the apps directory (application code) you must include an acknowledgement:
	39	* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
	40	*
	41	* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
	42	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	43	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	44	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
	45	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	46	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	47	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	49	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	50	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	51	* SUCH DAMAGE.
	52	*
	53	* The licence and distribution terms for any publically available version or
	54	* derivative of this code cannot be changed. i.e. this code cannot simply be
	55	* copied and put under another distribution licence
	56	* [including the GNU Public Licence.]
	57	*/
	58
651d0aff	59	/* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
d02b48c6 RE	60
	61	#include <stdio.h>
	62	#include "cryptlib.h"
ec577822 BM	63	#include <openssl/bn.h>
	64	#include <openssl/dsa.h>
	65	#include <openssl/asn1.h>
0b13e9f0	66	#ifndef OPENSSL_NO_ENGINE
5270e702	67	#include <openssl/engine.h>
0b13e9f0	68	#endif
3eeaab4b	69	#ifndef OPENSSL_NO_DH
60a938c6	70	#include <openssl/dh.h>
3eeaab4b	71	#endif
d02b48c6	72
560b79cb	73	const char DSA_version[]="DSA" OPENSSL_VERSION_PTEXT;
d02b48c6	74
a75b1915	75	static const DSA_METHOD *default_DSA_method = NULL;
c0711f7f	76
cb78486d GT	77	void DSA_set_default_method(const DSA_METHOD *meth)
	78	{
	79	default_DSA_method = meth;
	80	}
c0711f7f	81
cb78486d GT	82	const DSA_METHOD *DSA_get_default_method(void)
	83	{
	84	if(!default_DSA_method)
	85	default_DSA_method = DSA_OpenSSL();
c0711f7f	86	return default_DSA_method;
cb78486d	87	}
c0711f7f	88
6b691a5c	89	DSA *DSA_new(void)
cb78486d	90	{
c0711f7f	91	return DSA_new_method(NULL);
cb78486d	92	}
c0711f7f	93
cb78486d GT	94	int DSA_set_method(DSA dsa, const DSA_METHOD meth)
	95	{
	96	/* NB: The caller is specifically setting a method, so it's not up to us
	97	* to deal with which ENGINE it comes from. */
	98	const DSA_METHOD *mtmp;
c0711f7f DSH	99	mtmp = dsa->meth;
c0711f7f DSH	100	if (mtmp->finish) mtmp->finish(dsa);
0b13e9f0	101	#ifndef OPENSSL_NO_ENGINE
cb78486d GT	102	if (dsa->engine)
	103	{
	104	ENGINE_finish(dsa->engine);
	105	dsa->engine = NULL;
	106	}
0b13e9f0	107	#endif
c0711f7f DSH	108	dsa->meth = meth;
c0711f7f DSH	109	if (meth->init) meth->init(dsa);
cb78486d	110	return 1;
5270e702	111	}
c0711f7f	112
5270e702	113	DSA DSA_new_method(ENGINE engine)
d02b48c6 RE	114	{
	115	DSA *ret;
	116
26a3a48d	117	ret=(DSA *)OPENSSL_malloc(sizeof(DSA));
d02b48c6 RE	118	if (ret == NULL)
d02b48c6 RE	119	{
0c372b94	120	DSAerr(DSA_F_DSA_NEW_METHOD,ERR_R_MALLOC_FAILURE);
d02b48c6 RE	121	return(NULL);
d02b48c6 RE	122	}
cb78486d	123	ret->meth = DSA_get_default_method();
0b13e9f0	124	#ifndef OPENSSL_NO_ENGINE
0c372b94 DSH	125	if (engine)
	126	{
	127	if (!ENGINE_init(engine))
	128	{
	129	DSAerr(DSA_F_DSA_NEW_METHOD, ERR_R_ENGINE_LIB);
	130	OPENSSL_free(ret);
	131	return NULL;
	132	}
	133	ret->engine = engine;
	134	}
	135	else
cb78486d GT	136	ret->engine = ENGINE_get_default_DSA();
cb78486d GT	137	if(ret->engine)
5270e702	138	{
cb78486d GT	139	ret->meth = ENGINE_get_DSA(ret->engine);
	140	if(!ret->meth)
	141	{
0c372b94	142	DSAerr(DSA_F_DSA_NEW_METHOD,
cb78486d GT	143	ERR_R_ENGINE_LIB);
	144	ENGINE_finish(ret->engine);
	145	OPENSSL_free(ret);
	146	return NULL;
	147	}
5270e702	148	}
0b13e9f0	149	#endif
0c9de428	150
d02b48c6 RE	151	ret->pad=0;
	152	ret->version=0;
	153	ret->write_params=1;
	154	ret->p=NULL;
	155	ret->q=NULL;
	156	ret->g=NULL;
	157
	158	ret->pub_key=NULL;
	159	ret->priv_key=NULL;
	160
	161	ret->kinv=NULL;
	162	ret->r=NULL;
dfeab068	163	ret->method_mont_p=NULL;
d02b48c6 RE	164
d02b48c6 RE	165	ret->references=1;
dc03504d	166	ret->flags=ret->meth->flags & ~DSA_FLAG_NON_FIPS_ALLOW;
79aa04ef	167	CRYPTO_new_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
cb78486d	168	if ((ret->meth->init != NULL) && !ret->meth->init(ret))
c0711f7f	169	{
0b13e9f0	170	#ifndef OPENSSL_NO_ENGINE
0c372b94 DSH	171	if (ret->engine)
0c372b94 DSH	172	ENGINE_finish(ret->engine);
0b13e9f0	173	#endif
79aa04ef	174	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, ret, &ret->ex_data);
26a3a48d	175	OPENSSL_free(ret);
c0711f7f DSH	176	ret=NULL;
c0711f7f DSH	177	}
c0711f7f	178
d02b48c6 RE	179	return(ret);
	180	}
	181
6b691a5c	182	void DSA_free(DSA *r)
d02b48c6 RE	183	{
	184	int i;
	185
	186	if (r == NULL) return;
	187
	188	i=CRYPTO_add(&r->references,-1,CRYPTO_LOCK_DSA);
58964a49 RE	189	#ifdef REF_PRINT
	190	REF_PRINT("DSA",r);
	191	#endif
d02b48c6 RE	192	if (i > 0) return;
	193	#ifdef REF_CHECK
	194	if (i < 0)
	195	{
	196	fprintf(stderr,"DSA_free, bad reference count\n");
	197	abort();
	198	}
	199	#endif
	200
cb78486d GT	201	if(r->meth->finish)
cb78486d GT	202	r->meth->finish(r);
0b13e9f0	203	#ifndef OPENSSL_NO_ENGINE
cb78486d GT	204	if(r->engine)
cb78486d GT	205	ENGINE_finish(r->engine);
0b13e9f0	206	#endif
c0711f7f	207
79aa04ef	208	CRYPTO_free_ex_data(CRYPTO_EX_INDEX_DSA, r, &r->ex_data);
d50f1bdf	209
d02b48c6 RE	210	if (r->p != NULL) BN_clear_free(r->p);
	211	if (r->q != NULL) BN_clear_free(r->q);
	212	if (r->g != NULL) BN_clear_free(r->g);
	213	if (r->pub_key != NULL) BN_clear_free(r->pub_key);
	214	if (r->priv_key != NULL) BN_clear_free(r->priv_key);
	215	if (r->kinv != NULL) BN_clear_free(r->kinv);
	216	if (r->r != NULL) BN_clear_free(r->r);
26a3a48d	217	OPENSSL_free(r);
d02b48c6 RE	218	}
d02b48c6 RE	219
6ac4e8bd	220	int DSA_up_ref(DSA *r)
5cbc2e8b GT	221	{
	222	int i = CRYPTO_add(&r->references, 1, CRYPTO_LOCK_DSA);
	223	#ifdef REF_PRINT
	224	REF_PRINT("DSA",r);
	225	#endif
	226	#ifdef REF_CHECK
	227	if (i < 2)
	228	{
6ac4e8bd	229	fprintf(stderr, "DSA_up_ref, bad reference count\n");
5cbc2e8b GT	230	abort();
	231	}
	232	#endif
	233	return ((i > 1) ? 1 : 0);
	234	}
	235
a4aba800	236	int DSA_size(const DSA *r)
d02b48c6 RE	237	{
	238	int ret,i;
	239	ASN1_INTEGER bs;
e9b553da RL	240	unsigned char buf[4]; /* 4 bytes looks really small.
	241	However, i2d_ASN1_INTEGER() will not look
	242	beyond the first byte, as long as the second
	243	parameter is NULL. */
d02b48c6 RE	244
	245	i=BN_num_bits(r->q);
	246	bs.length=(i+7)/8;
	247	bs.data=buf;
	248	bs.type=V_ASN1_INTEGER;
	249	/* If the top bit is set the asn1 encoding is 1 larger. */
	250	buf[0]=0xff;
	251
	252	i=i2d_ASN1_INTEGER(&bs,NULL);
	253	i+=i; /* r and s */
	254	ret=ASN1_object_size(1,i,V_ASN1_SEQUENCE);
	255	return(ret);
	256	}
	257
dd9d233e DSH	258	int DSA_get_ex_new_index(long argl, void argp, CRYPTO_EX_new new_func,
dd9d233e DSH	259	CRYPTO_EX_dup dup_func, CRYPTO_EX_free free_func)
c0711f7f	260	{
79aa04ef GT	261	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_DSA, argl, argp,
79aa04ef GT	262	new_func, dup_func, free_func);
c0711f7f DSH	263	}
c0711f7f DSH	264
dd9d233e	265	int DSA_set_ex_data(DSA d, int idx, void arg)
c0711f7f DSH	266	{
	267	return(CRYPTO_set_ex_data(&d->ex_data,idx,arg));
	268	}
	269
dd9d233e	270	void DSA_get_ex_data(DSA d, int idx)
c0711f7f DSH	271	{
	272	return(CRYPTO_get_ex_data(&d->ex_data,idx));
	273	}
	274
2514fa79 DSH	275	int DSA_security_bits(const DSA *d)
	276	{
	277	return BN_security_bits(BN_num_bits(d->p), BN_num_bits(d->q));
	278	}
	279
cf1b7d96	280	#ifndef OPENSSL_NO_DH
a4aba800	281	DH DSA_dup_DH(const DSA r)
48c843c3 BM	282	{
48c843c3 BM	283	/* DSA has p, q, g, optional pub_key, optional priv_key.
31360957 DSH	284	* DH has p, optional length, g, optional pub_key, optional priv_key,
31360957 DSH	285	* optional q.
48c843c3 BM	286	*/
48c843c3 BM	287
a12258fc	288	DH *ret = NULL;
48c843c3 BM	289
	290	if (r == NULL)
	291	goto err;
	292	ret = DH_new();
	293	if (ret == NULL)
	294	goto err;
	295	if (r->p != NULL)
	296	if ((ret->p = BN_dup(r->p)) == NULL)
	297	goto err;
	298	if (r->q != NULL)
31360957	299	{
48c843c3	300	ret->length = BN_num_bits(r->q);
31360957 DSH	301	if ((ret->q = BN_dup(r->q)) == NULL)
	302	goto err;
	303	}
48c843c3 BM	304	if (r->g != NULL)
	305	if ((ret->g = BN_dup(r->g)) == NULL)
	306	goto err;
	307	if (r->pub_key != NULL)
	308	if ((ret->pub_key = BN_dup(r->pub_key)) == NULL)
	309	goto err;
	310	if (r->priv_key != NULL)
	311	if ((ret->priv_key = BN_dup(r->priv_key)) == NULL)
	312	goto err;
	313
	314	return ret;
	315
	316	err:
	317	if (ret != NULL)
	318	DH_free(ret);
	319	return NULL;
	320	}
	321	#endif