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

/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
 * project 2006.
 */
/* ====================================================================
 * Copyright (c) 2006 The OpenSSL Project.  All rights reserved.
 *
 * 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 above 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 acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    licensing@OpenSSL.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED 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 OpenSSL PROJECT OR
 * ITS 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.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include "cryptlib.h"
#include <openssl/x509.h>
#include <openssl/asn1.h>
#include <openssl/dsa.h>
#include "asn1_locl.h"

static int dsa_pub_decode(EVP_PKEY *pkey, X509_PUBKEY *pubkey)
	{
	const unsigned char *p, *pm;
	int pklen, pmlen;
	int ptype;
	void *pval;
	ASN1_STRING *pstr;
	X509_ALGOR *palg;
	ASN1_INTEGER *public_key = NULL;

	DSA *dsa = NULL;

	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
		return 0;
	X509_ALGOR_get0(NULL, &ptype, &pval, palg);

	if (ptype != V_ASN1_SEQUENCE)
		{
		DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
		goto err;
		}

	pstr = pval;	
	pm = pstr->data;
	pmlen = pstr->length;

	if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
		{
		DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
		goto err;
		}

	if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
		{
		DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
		goto err;
		}

	/* We have parameters now set public key */
	if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
		{
		DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
		goto err;
		}

	ASN1_INTEGER_free(public_key);

	return 1;

	err:
	if (pubkey)
		ASN1_INTEGER_free(public_key);
	if (dsa)
		DSA_free(dsa);
	return 0;

	}

static int dsa_pub_encode(X509_PUBKEY *pk, const EVP_PKEY *pkey)
	{
	DSA *dsa;
	void *pval;
	int ptype;
	unsigned char *penc = NULL;
	int penclen;

	dsa=pkey->pkey.dsa;
	if (pkey->save_parameters)
		{
		ASN1_STRING *str;
		str = ASN1_STRING_new();
		str->length = i2d_DSAparams(dsa, &str->data);
		if (str->length <= 0)
			{
			DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
			goto err;
			}
		ptype = V_ASN1_SEQUENCE;
		}
	else
		{
		ptype = V_ASN1_UNDEF;
		pval = NULL;
		}
	dsa->write_params=0;

	penclen = i2d_DSAPublicKey(dsa, &penc);

	if (penclen <= 0)
		{
		DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
		goto err;
		}

	if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
				ptype, pval, penc, penclen))
		return 1;

	err:
	if (penc)
		OPENSSL_free(penc);
	if (pval)
		ASN1_STRING_free(pval);

	return 0;
	}

static int dsa_pub_cmp(const EVP_PKEY *a, const EVP_PKEY *b)
	{
	if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
		return 0;
	else
		return 1;
	}

/* In PKCS#8 DSA: you just get a private key integer and parameters in the
 * AlgorithmIdentifier the pubkey must be recalculated.
 */
	
static int dsa_priv_decode(EVP_PKEY *pkey, PKCS8_PRIV_KEY_INFO *p8)
	{
	const unsigned char *p, *pm;
	int pklen, pmlen;
	int ptype;
	void *pval;
	ASN1_STRING *pstr;
	X509_ALGOR *palg;
	ASN1_INTEGER *privkey = NULL;
	BN_CTX *ctx = NULL;

	STACK_OF(ASN1_TYPE) *ndsa = NULL;
	DSA *dsa = NULL;

	if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
		return 0;
	X509_ALGOR_get0(NULL, &ptype, &pval, palg);

	/* Check for broken DSA PKCS#8, UGH! */
	if (*p == (V_ASN1_SEQUENCE|V_ASN1_CONSTRUCTED))
		{
		ASN1_TYPE *t1, *t2;
	    	if(!(ndsa = ASN1_seq_unpack_ASN1_TYPE(p, pklen, 
							  d2i_ASN1_TYPE,
							  ASN1_TYPE_free)))
			goto decerr;
		if (sk_ASN1_TYPE_num(ndsa) != 2)
			goto decerr;
		/* Handle Two broken types:
	    	 * SEQUENCE {parameters, priv_key}
		 * SEQUENCE {pub_key, priv_key}
		 */

		t1 = sk_ASN1_TYPE_value(ndsa, 0);
		t2 = sk_ASN1_TYPE_value(ndsa, 1);
		if (t1->type == V_ASN1_SEQUENCE)
			{
			p8->broken = PKCS8_EMBEDDED_PARAM;
			pval = t1->value.ptr;
			}
		else if (ptype == V_ASN1_SEQUENCE)
			p8->broken = PKCS8_NS_DB;
		else
			goto decerr;

		if (t2->type != V_ASN1_INTEGER)
			goto decerr;

		privkey = t2->value.integer;
		}
	else
		{
		if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
			goto decerr;
		if (ptype != V_ASN1_SEQUENCE)
			goto decerr;
		}

	pstr = pval;	
	pm = pstr->data;
	pmlen = pstr->length;
	if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
		goto decerr;
	/* We have parameters now set private key */
	if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
		{
		DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
		goto dsaerr;
		}
	/* Calculate public key */
	if (!(dsa->pub_key = BN_new()))
		{
		DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
		goto dsaerr;
		}
	if (!(ctx = BN_CTX_new()))
		{
		DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
		goto dsaerr;
		}
			
	if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
		{
		DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
		goto dsaerr;
		}

	EVP_PKEY_assign_DSA(pkey, dsa);
	BN_CTX_free (ctx);
	if(ndsa)
		sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
	else
		ASN1_INTEGER_free(privkey);

	return 1;

	decerr:
	DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
	dsaerr:
	BN_CTX_free (ctx);
	sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
	DSA_free(dsa);
	EVP_PKEY_free(pkey);
	return 0;
	}

static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO *p8, const EVP_PKEY *pkey)
{
	ASN1_STRING *params = NULL;
	ASN1_INTEGER *prkey = NULL;
	unsigned char *dp = NULL;
	int dplen;

	params = ASN1_STRING_new();

	if (!params)
		{
		DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
	if (params->length <= 0)
		{
		DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
		goto err;
		}
	params->type = V_ASN1_SEQUENCE;

	/* Get private key into integer */
	prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);

	if (!prkey)
		{
		DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
		goto err;
		}

	dplen = i2d_ASN1_INTEGER(prkey, &dp);

	ASN1_INTEGER_free(prkey);

	if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
				V_ASN1_SEQUENCE, params, dp, dplen))
		goto err;

	return 1;

err:
	if (dp != NULL)
		OPENSSL_free(dp);
	if (params != NULL)
		ASN1_STRING_free(params);
	if (prkey != NULL)
		ASN1_INTEGER_free(prkey);
	return 0;
}

static int int_dsa_size(const EVP_PKEY *pkey)
	{
	return(DSA_size(pkey->pkey.dsa));
	}

static int dsa_bits(const EVP_PKEY *pkey)
	{
	return BN_num_bits(pkey->pkey.dsa->p);
	}

static int dsa_missing_parameters(const EVP_PKEY *pkey)
	{
	DSA *dsa;
	dsa=pkey->pkey.dsa;
	if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))
			return 1;
	return 0;
	}

static int dsa_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)
	{
	BIGNUM *a;

	if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
		return 0;
	if (to->pkey.dsa->p != NULL)
		BN_free(to->pkey.dsa->p);
	to->pkey.dsa->p=a;

	if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
		return 0;
	if (to->pkey.dsa->q != NULL)
		BN_free(to->pkey.dsa->q);
	to->pkey.dsa->q=a;

	if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
		return 0;
	if (to->pkey.dsa->g != NULL)
		BN_free(to->pkey.dsa->g);
	to->pkey.dsa->g=a;
	return 1;
	}

static int dsa_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)
	{
	if (	BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) ||
		BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) ||
		BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
		return 0;
	else
		return 1;
	}

static void int_dsa_free(EVP_PKEY *pkey)
	{
	DSA_free(pkey->pkey.dsa);
	}

static void update_buflen(const BIGNUM *b, size_t *pbuflen)
	{
	int i;
	if (!b)
		return;
	if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
			*pbuflen = i;
	}

int do_dsa_print(BIO *bp, const DSA *x, int off, int ptype)
	{
	unsigned char *m=NULL;
	int ret=0;
	size_t buf_len=0;
	const char *ktype = NULL;

	const BIGNUM *priv_key, *pub_key;

	if (ptype == 2)
		priv_key = x->priv_key;
	else
		priv_key = NULL;

	if (ptype > 0)
		pub_key = x->pub_key;
	else
		pub_key = NULL;

	if (ptype == 2)
		ktype = "Private-Key";
	else if (ptype == 1)
		ktype = "Public-Key";
	else
		ktype = "DSA-Parameters";

	if (x->p == NULL)
		{
		DSAerr(DSA_F_DSA_PRINT,DSA_R_MISSING_PARAMETERS);
		goto err;
		}

	update_buflen(x->p, &buf_len);
	update_buflen(x->q, &buf_len);
	update_buflen(x->g, &buf_len);
	update_buflen(priv_key, &buf_len);
	update_buflen(pub_key, &buf_len);

	m=(unsigned char *)OPENSSL_malloc(buf_len+10);
	if (m == NULL)
		{
		DSAerr(DSA_F_DSA_PRINT,ERR_R_MALLOC_FAILURE);
		goto err;
		}

	if (priv_key)
		{
		if(!BIO_indent(bp,off,128))
		   goto err;
		if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
			<= 0) goto err;
		}

	if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
		goto err;
	if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
		goto err;
	if (!ASN1_bn_print(bp,"P:   ",x->p,m,off)) goto err;
	if (!ASN1_bn_print(bp,"Q:   ",x->q,m,off)) goto err;
	if (!ASN1_bn_print(bp,"G:   ",x->g,m,off)) goto err;
	ret=1;
err:
	if (m != NULL) OPENSSL_free(m);
	return(ret);
	}


static int dsa_param_print(BIO *bp, const EVP_PKEY *pkey, int indent,
							ASN1_PCTX *ctx)
	{
	return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
	}

static int dsa_pub_print(BIO *bp, const EVP_PKEY *pkey, int indent,
							ASN1_PCTX *ctx)
	{
	return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
	}


static int dsa_priv_print(BIO *bp, const EVP_PKEY *pkey, int indent,
							ASN1_PCTX *ctx)
	{
	return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
	}

/* NB these are sorted in pkey_id order, lowest first */

const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] = 
	{

		{
		EVP_PKEY_DSA2,
		EVP_PKEY_DSA,
		ASN1_PKEY_ALIAS
		},

		{
		EVP_PKEY_DSA1,
		EVP_PKEY_DSA,
		ASN1_PKEY_ALIAS
		},

		{
		EVP_PKEY_DSA4,
		EVP_PKEY_DSA,
		ASN1_PKEY_ALIAS
		},

		{
		EVP_PKEY_DSA3,
		EVP_PKEY_DSA,
		ASN1_PKEY_ALIAS
		},

		{
		EVP_PKEY_DSA,
		EVP_PKEY_DSA,
		0,

		dsa_pub_decode,
		dsa_pub_encode,
		dsa_pub_cmp,
		dsa_pub_print,

		dsa_priv_decode,
		dsa_priv_encode,
		dsa_priv_print,

		int_dsa_size,
		dsa_bits,

		0,0,
		dsa_missing_parameters,
		dsa_copy_parameters,
		dsa_cmp_parameters,
		dsa_param_print,

		int_dsa_free,
		0
		}
	};
Commit	Line	Data
448be743 DSH	1	/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
	2	* project 2006.
	3	*/
	4	/* ====================================================================
	5	* Copyright (c) 2006 The OpenSSL Project. All rights reserved.
	6	*
	7	* Redistribution and use in source and binary forms, with or without
	8	* modification, are permitted provided that the following conditions
	9	* are met:
	10	*
	11	* 1. Redistributions of source code must retain the above copyright
	12	* notice, this list of conditions and the following disclaimer.
	13	*
	14	* 2. Redistributions in binary form must reproduce the above copyright
	15	* notice, this list of conditions and the following disclaimer in
	16	* the documentation and/or other materials provided with the
	17	* distribution.
	18	*
	19	* 3. All advertising materials mentioning features or use of this
	20	* software must display the following acknowledgment:
	21	* "This product includes software developed by the OpenSSL Project
	22	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	23	*
	24	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	25	* endorse or promote products derived from this software without
	26	* prior written permission. For written permission, please contact
	27	* licensing@OpenSSL.org.
	28	*
	29	* 5. Products derived from this software may not be called "OpenSSL"
	30	* nor may "OpenSSL" appear in their names without prior written
	31	* permission of the OpenSSL Project.
	32	*
	33	* 6. Redistributions of any form whatsoever must retain the following
	34	* acknowledgment:
	35	* "This product includes software developed by the OpenSSL Project
	36	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	37	*
	38	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	39	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	40	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	41	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	42	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	43	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	44	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	45	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	46	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	47	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	48	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	49	* OF THE POSSIBILITY OF SUCH DAMAGE.
	50	* ====================================================================
	51	*
	52	* This product includes cryptographic software written by Eric Young
	53	* (eay@cryptsoft.com). This product includes software written by Tim
	54	* Hudson (tjh@cryptsoft.com).
	55	*
	56	*/
	57
	58	#include <stdio.h>
	59	#include "cryptlib.h"
	60	#include <openssl/x509.h>
	61	#include <openssl/asn1.h>
	62	#include <openssl/dsa.h>
18e377b4	63	#include "asn1_locl.h"
448be743 DSH	64
	65	static int dsa_pub_decode(EVP_PKEY pkey, X509_PUBKEY pubkey)
	66	{
	67	const unsigned char p, pm;
	68	int pklen, pmlen;
	69	int ptype;
	70	void *pval;
	71	ASN1_STRING *pstr;
	72	X509_ALGOR *palg;
	73	ASN1_INTEGER *public_key = NULL;
	74
	75	DSA *dsa = NULL;
	76
	77	if (!X509_PUBKEY_get0_param(NULL, &p, &pklen, &palg, pubkey))
	78	return 0;
	79	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
	80
	81	if (ptype != V_ASN1_SEQUENCE)
	82	{
	83	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_PARAMETER_ENCODING_ERROR);
	84	goto err;
	85	}
	86
	87	pstr = pval;
	88	pm = pstr->data;
	89	pmlen = pstr->length;
	90
	91	if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
	92	{
	93	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
	94	goto err;
	95	}
	96
	97	if (!(public_key=d2i_ASN1_INTEGER(NULL, &p, pklen)))
	98	{
	99	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_DECODE_ERROR);
	100	goto err;
	101	}
	102
	103	/* We have parameters now set public key */
	104	if (!(dsa->pub_key = ASN1_INTEGER_to_BN(public_key, NULL)))
	105	{
	106	DSAerr(DSA_F_DSA_PUB_DECODE, DSA_R_BN_DECODE_ERROR);
	107	goto err;
	108	}
	109
	110	ASN1_INTEGER_free(public_key);
	111
	112	return 1;
	113
	114	err:
	115	if (pubkey)
	116	ASN1_INTEGER_free(public_key);
	117	if (dsa)
	118	DSA_free(dsa);
	119	return 0;
	120
	121	}
	122
6f81892e	123	static int dsa_pub_encode(X509_PUBKEY pk, const EVP_PKEY pkey)
448be743 DSH	124	{
	125	DSA *dsa;
	126	void *pval;
	127	int ptype;
	128	unsigned char *penc = NULL;
	129	int penclen;
	130
	131	dsa=pkey->pkey.dsa;
	132	if (pkey->save_parameters)
	133	{
	134	ASN1_STRING *str;
	135	str = ASN1_STRING_new();
	136	str->length = i2d_DSAparams(dsa, &str->data);
	137	if (str->length <= 0)
	138	{
	139	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
	140	goto err;
	141	}
	142	ptype = V_ASN1_SEQUENCE;
	143	}
	144	else
	145	{
	146	ptype = V_ASN1_UNDEF;
	147	pval = NULL;
	148	}
	149	dsa->write_params=0;
	150
	151	penclen = i2d_DSAPublicKey(dsa, &penc);
	152
	153	if (penclen <= 0)
	154	{
	155	DSAerr(DSA_F_DSA_PUB_ENCODE, ERR_R_MALLOC_FAILURE);
	156	goto err;
	157	}
	158
	159	if (X509_PUBKEY_set0_param(pk, OBJ_nid2obj(EVP_PKEY_DSA),
	160	ptype, pval, penc, penclen))
	161	return 1;
	162
	163	err:
	164	if (penc)
	165	OPENSSL_free(penc);
	166	if (pval)
	167	ASN1_STRING_free(pval);
	168
	169	return 0;
	170	}
	171
6f81892e DSH	172	static int dsa_pub_cmp(const EVP_PKEY a, const EVP_PKEY b)
	173	{
	174	if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)
	175	return 0;
	176	else
	177	return 1;
	178	}
	179
448be743 DSH	180	/* In PKCS#8 DSA: you just get a private key integer and parameters in the
	181	* AlgorithmIdentifier the pubkey must be recalculated.
	182	*/
	183
	184	static int dsa_priv_decode(EVP_PKEY pkey, PKCS8_PRIV_KEY_INFO p8)
	185	{
	186	const unsigned char p, pm;
	187	int pklen, pmlen;
	188	int ptype;
	189	void *pval;
	190	ASN1_STRING *pstr;
	191	X509_ALGOR *palg;
	192	ASN1_INTEGER *privkey = NULL;
	193	BN_CTX *ctx = NULL;
	194
	195	STACK_OF(ASN1_TYPE) *ndsa = NULL;
	196	DSA *dsa = NULL;
	197
	198	if (!PKCS8_pkey_get0(NULL, &p, &pklen, &palg, p8))
	199	return 0;
	200	X509_ALGOR_get0(NULL, &ptype, &pval, palg);
	201
	202	/* Check for broken DSA PKCS#8, UGH! */
	203	if (*p == (V_ASN1_SEQUENCE\|V_ASN1_CONSTRUCTED))
	204	{
	205	ASN1_TYPE t1, t2;
	206	if(!(ndsa = ASN1_seq_unpack_ASN1_TYPE(p, pklen,
	207	d2i_ASN1_TYPE,
	208	ASN1_TYPE_free)))
	209	goto decerr;
	210	if (sk_ASN1_TYPE_num(ndsa) != 2)
	211	goto decerr;
	212	/* Handle Two broken types:
	213	* SEQUENCE {parameters, priv_key}
	214	* SEQUENCE {pub_key, priv_key}
	215	*/
	216
	217	t1 = sk_ASN1_TYPE_value(ndsa, 0);
	218	t2 = sk_ASN1_TYPE_value(ndsa, 1);
	219	if (t1->type == V_ASN1_SEQUENCE)
	220	{
	221	p8->broken = PKCS8_EMBEDDED_PARAM;
	222	pval = t1->value.ptr;
	223	}
	224	else if (ptype == V_ASN1_SEQUENCE)
	225	p8->broken = PKCS8_NS_DB;
	226	else
	227	goto decerr;
	228
	229	if (t2->type != V_ASN1_INTEGER)
	230	goto decerr;
	231
	232	privkey = t2->value.integer;
	233	}
	234	else
	235	{
	236	if (!(privkey=d2i_ASN1_INTEGER(NULL, &p, pklen)))
	237	goto decerr;
	238	if (ptype != V_ASN1_SEQUENCE)
	239	goto decerr;
	240	}
	241
	242	pstr = pval;
	243	pm = pstr->data;
244	pmlen = pstr->length;
245	if (!(dsa = d2i_DSAparams(NULL, &pm, pmlen)))
246	goto decerr;
247	/* We have parameters now set private key */
248	if (!(dsa->priv_key = ASN1_INTEGER_to_BN(privkey, NULL)))
249	{
250	DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
251	goto dsaerr;
252	}
253	/* Calculate public key */
254	if (!(dsa->pub_key = BN_new()))
255	{
256	DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
257	goto dsaerr;
258	}
259	if (!(ctx = BN_CTX_new()))
260	{
261	DSAerr(DSA_F_DSA_PRIV_DECODE, ERR_R_MALLOC_FAILURE);
262	goto dsaerr;
263	}
264
265	if (!BN_mod_exp(dsa->pub_key, dsa->g, dsa->priv_key, dsa->p, ctx))
266	{
267	DSAerr(DSA_F_DSA_PRIV_DECODE,DSA_R_BN_ERROR);
268	goto dsaerr;
269	}
270
271	EVP_PKEY_assign_DSA(pkey, dsa);
272	BN_CTX_free (ctx);
273	if(ndsa)
274	sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
275	else
276	ASN1_INTEGER_free(privkey);
277
278	return 1;
279
280	decerr:
281	DSAerr(DSA_F_DSA_PRIV_DECODE, EVP_R_DECODE_ERROR);
282	dsaerr:
283	BN_CTX_free (ctx);
284	sk_ASN1_TYPE_pop_free(ndsa, ASN1_TYPE_free);
285	DSA_free(dsa);
286	EVP_PKEY_free(pkey);
287	return 0;
288	}
289
6f81892e	290	static int dsa_priv_encode(PKCS8_PRIV_KEY_INFO p8, const EVP_PKEY pkey)
448be743 DSH	291	{
	292	ASN1_STRING *params = NULL;
	293	ASN1_INTEGER *prkey = NULL;
	294	unsigned char *dp = NULL;
	295	int dplen;
	296
	297	params = ASN1_STRING_new();
	298
	299	if (!params)
	300	{
	301	DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
	302	goto err;
	303	}
	304
	305	params->length = i2d_DSAparams(pkey->pkey.dsa, &params->data);
	306	if (params->length <= 0)
	307	{
	308	DSAerr(DSA_F_DSA_PRIV_ENCODE,ERR_R_MALLOC_FAILURE);
	309	goto err;
	310	}
	311	params->type = V_ASN1_SEQUENCE;
	312
	313	/* Get private key into integer */
	314	prkey = BN_to_ASN1_INTEGER(pkey->pkey.dsa->priv_key, NULL);
	315
	316	if (!prkey)
	317	{
	318	DSAerr(DSA_F_DSA_PRIV_ENCODE,DSA_R_BN_ERROR);
	319	goto err;
	320	}
	321
	322	dplen = i2d_ASN1_INTEGER(prkey, &dp);
	323
	324	ASN1_INTEGER_free(prkey);
	325
	326	if (!PKCS8_pkey_set0(p8, OBJ_nid2obj(NID_dsa), 0,
	327	V_ASN1_SEQUENCE, params, dp, dplen))
	328	goto err;
	329
	330	return 1;
	331
	332	err:
	333	if (dp != NULL)
	334	OPENSSL_free(dp);
	335	if (params != NULL)
	336	ASN1_STRING_free(params);
	337	if (prkey != NULL)
	338	ASN1_INTEGER_free(prkey);
	339	return 0;
	340	}
	341
6f81892e DSH	342	static int int_dsa_size(const EVP_PKEY *pkey)
	343	{
	344	return(DSA_size(pkey->pkey.dsa));
	345	}
	346
	347	static int dsa_bits(const EVP_PKEY *pkey)
	348	{
	349	return BN_num_bits(pkey->pkey.dsa->p);
	350	}
	351
	352	static int dsa_missing_parameters(const EVP_PKEY *pkey)
	353	{
	354	DSA *dsa;
	355	dsa=pkey->pkey.dsa;
	356	if ((dsa->p == NULL) \|\| (dsa->q == NULL) \|\| (dsa->g == NULL))
	357	return 1;
	358	return 0;
	359	}
	360
	361	static int dsa_copy_parameters(EVP_PKEY to, const EVP_PKEY from)
	362	{
	363	BIGNUM *a;
	364
	365	if ((a=BN_dup(from->pkey.dsa->p)) == NULL)
	366	return 0;
	367	if (to->pkey.dsa->p != NULL)
	368	BN_free(to->pkey.dsa->p);
	369	to->pkey.dsa->p=a;
	370
	371	if ((a=BN_dup(from->pkey.dsa->q)) == NULL)
	372	return 0;
	373	if (to->pkey.dsa->q != NULL)
	374	BN_free(to->pkey.dsa->q);
	375	to->pkey.dsa->q=a;
	376
	377	if ((a=BN_dup(from->pkey.dsa->g)) == NULL)
	378	return 0;
	379	if (to->pkey.dsa->g != NULL)
	380	BN_free(to->pkey.dsa->g);
	381	to->pkey.dsa->g=a;
	382	return 1;
	383	}
	384
	385	static int dsa_cmp_parameters(const EVP_PKEY a, const EVP_PKEY b)
	386	{
	387	if ( BN_cmp(a->pkey.dsa->p,b->pkey.dsa->p) \|\|
	388	BN_cmp(a->pkey.dsa->q,b->pkey.dsa->q) \|\|
	389	BN_cmp(a->pkey.dsa->g,b->pkey.dsa->g))
	390	return 0;
	391	else
	392	return 1;
	393	}
	394
	395	static void int_dsa_free(EVP_PKEY *pkey)
	396	{
	397	DSA_free(pkey->pkey.dsa);
	398	}
	399
35208f36 DSH	400	static void update_buflen(const BIGNUM b, size_t pbuflen)
	401	{
	402	int i;
	403	if (!b)
	404	return;
	405	if (*pbuflen < (i = (size_t)BN_num_bytes(b)))
	406	*pbuflen = i;
	407	}
	408
	409	int do_dsa_print(BIO bp, const DSA x, int off, int ptype)
	410	{
	411	unsigned char *m=NULL;
	412	int ret=0;
	413	size_t buf_len=0;
	414	const char *ktype = NULL;
	415
	416	const BIGNUM priv_key, pub_key;
	417
	418	if (ptype == 2)
	419	priv_key = x->priv_key;
	420	else
	421	priv_key = NULL;
	422
	423	if (ptype > 0)
	424	pub_key = x->pub_key;
	425	else
	426	pub_key = NULL;
	427
	428	if (ptype == 2)
	429	ktype = "Private-Key";
	430	else if (ptype == 1)
	431	ktype = "Public-Key";
	432	else
	433	ktype = "DSA-Parameters";
	434
	435	if (x->p == NULL)
	436	{
	437	DSAerr(DSA_F_DSA_PRINT,DSA_R_MISSING_PARAMETERS);
	438	goto err;
	439	}
	440
	441	update_buflen(x->p, &buf_len);
	442	update_buflen(x->q, &buf_len);
	443	update_buflen(x->g, &buf_len);
	444	update_buflen(priv_key, &buf_len);
	445	update_buflen(pub_key, &buf_len);
	446
	447	m=(unsigned char *)OPENSSL_malloc(buf_len+10);
	448	if (m == NULL)
	449	{
	450	DSAerr(DSA_F_DSA_PRINT,ERR_R_MALLOC_FAILURE);
	451	goto err;
	452	}
	453
	454	if (priv_key)
	455	{
	456	if(!BIO_indent(bp,off,128))
	457	goto err;
	458	if (BIO_printf(bp,"%s: (%d bit)\n",ktype, BN_num_bits(x->p))
	459	<= 0) goto err;
	460	}
	461
	462	if (!ASN1_bn_print(bp,"priv:",priv_key,m,off))
	463	goto err;
464	if (!ASN1_bn_print(bp,"pub: ",pub_key,m,off))
465	goto err;
466	if (!ASN1_bn_print(bp,"P: ",x->p,m,off)) goto err;
467	if (!ASN1_bn_print(bp,"Q: ",x->q,m,off)) goto err;
468	if (!ASN1_bn_print(bp,"G: ",x->g,m,off)) goto err;
469	ret=1;
470	err:
471	if (m != NULL) OPENSSL_free(m);
472	return(ret);
473	}
474
475
476	static int dsa_param_print(BIO bp, const EVP_PKEY pkey, int indent,
477	ASN1_PCTX *ctx)
478	{
479	return do_dsa_print(bp, pkey->pkey.dsa, indent, 0);
480	}
481
482	static int dsa_pub_print(BIO bp, const EVP_PKEY pkey, int indent,
483	ASN1_PCTX *ctx)
484	{
485	return do_dsa_print(bp, pkey->pkey.dsa, indent, 1);
486	}
487
488
489	static int dsa_priv_print(BIO bp, const EVP_PKEY pkey, int indent,
490	ASN1_PCTX *ctx)
491	{
492	return do_dsa_print(bp, pkey->pkey.dsa, indent, 2);
493	}
494
448be743 DSH	495	/* NB these are sorted in pkey_id order, lowest first */
	496
	497	const EVP_PKEY_ASN1_METHOD dsa_asn1_meths[] =
	498	{
	499
	500	{
	501	EVP_PKEY_DSA2,
	502	EVP_PKEY_DSA,
	503	ASN1_PKEY_ALIAS
	504	},
	505
	506	{
	507	EVP_PKEY_DSA1,
	508	EVP_PKEY_DSA,
	509	ASN1_PKEY_ALIAS
	510	},
	511
	512	{
	513	EVP_PKEY_DSA4,
	514	EVP_PKEY_DSA,
	515	ASN1_PKEY_ALIAS
	516	},
	517
	518	{
	519	EVP_PKEY_DSA3,
	520	EVP_PKEY_DSA,
	521	ASN1_PKEY_ALIAS
	522	},
	523
	524	{
	525	EVP_PKEY_DSA,
	526	EVP_PKEY_DSA,
	527	0,
6f81892e	528
448be743 DSH	529	dsa_pub_decode,
448be743 DSH	530	dsa_pub_encode,
6f81892e	531	dsa_pub_cmp,
35208f36	532	dsa_pub_print,
6f81892e	533
448be743 DSH	534	dsa_priv_decode,
448be743 DSH	535	dsa_priv_encode,
35208f36	536	dsa_priv_print,
6f81892e DSH	537
	538	int_dsa_size,
	539	dsa_bits,
	540
	541	0,0,
	542	dsa_missing_parameters,
	543	dsa_copy_parameters,
	544	dsa_cmp_parameters,
35208f36	545	dsa_param_print,
6f81892e DSH	546
6f81892e DSH	547	int_dsa_free,
448be743 DSH	548	0
	549	}
	550	};
	551