/* crypto/evp/p_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.]

 */

#include <stdio.h>

#include "cryptlib.h"

#include <openssl/bn.h>

#include <openssl/err.h>

#include <openssl/objects.h>

#include <openssl/evp.h>

#include <openssl/asn1_mac.h>

#include <openssl/x509.h>

#ifndef OPENSSL_NO_RSA

#include <openssl/rsa.h>

#endif

#ifndef OPENSSL_NO_DSA

#include <openssl/dsa.h>

#endif

#ifndef OPENSSL_NO_DH

#include <openssl/dh.h>

#endif

static void EVP_PKEY_free_it(EVP_PKEY *x);

EXPORT_C int EVP_PKEY_bits(EVP_PKEY *pkey)

	{

	if (0)

		return 0;

#ifndef OPENSSL_NO_RSA

	else if (pkey->type == EVP_PKEY_RSA)

		return(BN_num_bits(pkey->pkey.rsa->n));

#endif

#ifndef OPENSSL_NO_DSA

	else if (pkey->type == EVP_PKEY_DSA)

		return(BN_num_bits(pkey->pkey.dsa->p));

#endif

#ifndef OPENSSL_NO_EC

	else if (pkey->type == EVP_PKEY_EC)

		{

		BIGNUM *order = BN_new();

		const EC_GROUP *group;

		int ret;

		if (!order)

			{

			ERR_clear_error();

			return 0;

			}

		group = EC_KEY_get0_group(pkey->pkey.ec);

		if (!EC_GROUP_get_order(group, order, NULL))

			{

			ERR_clear_error();

			return 0;

			}

		ret = BN_num_bits(order);

		BN_free(order);

		return ret;

		}

#endif

	return(0);

	}

EXPORT_C int EVP_PKEY_size(EVP_PKEY *pkey)

	{

	if (pkey == NULL)

		return(0);

#ifndef OPENSSL_NO_RSA

	if (pkey->type == EVP_PKEY_RSA)

		return(RSA_size(pkey->pkey.rsa));

	else

#endif

#ifndef OPENSSL_NO_DSA

		if (pkey->type == EVP_PKEY_DSA)

		return(DSA_size(pkey->pkey.dsa));

#endif

#ifndef OPENSSL_NO_ECDSA

		if (pkey->type == EVP_PKEY_EC)

		return(ECDSA_size(pkey->pkey.ec));

#endif

	return(0);

	}

EXPORT_C int EVP_PKEY_save_parameters(EVP_PKEY *pkey, int mode)

	{

#ifndef OPENSSL_NO_DSA

	if (pkey->type == EVP_PKEY_DSA)

		{

		int ret=pkey->save_parameters;

		if (mode >= 0)

			pkey->save_parameters=mode;

		return(ret);

		}

#endif

#ifndef OPENSSL_NO_EC

	if (pkey->type == EVP_PKEY_EC)

		{

		int ret = pkey->save_parameters;

		if (mode >= 0)

			pkey->save_parameters = mode;

		return(ret);

		}

#endif

	return(0);

	}

EXPORT_C int EVP_PKEY_copy_parameters(EVP_PKEY *to, const EVP_PKEY *from)

	{

	if (to->type != from->type)

		{

		EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_DIFFERENT_KEY_TYPES);

		goto err;

		}

	if (EVP_PKEY_missing_parameters(from))

		{

		EVPerr(EVP_F_EVP_PKEY_COPY_PARAMETERS,EVP_R_MISSING_PARAMETERS);

		goto err;

		}

#ifndef OPENSSL_NO_DSA

	if (to->type == EVP_PKEY_DSA)

		{

		BIGNUM *a;

		if ((a=BN_dup(from->pkey.dsa->p)) == NULL) goto err;

		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) goto err;

		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) goto err;

		if (to->pkey.dsa->g != NULL) BN_free(to->pkey.dsa->g);

		to->pkey.dsa->g=a;

		}

#endif

#ifndef OPENSSL_NO_EC

	if (to->type == EVP_PKEY_EC)

		{

		EC_GROUP *group = EC_GROUP_dup(EC_KEY_get0_group(from->pkey.ec));

		if (group == NULL)

			goto err;

		if (EC_KEY_set_group(to->pkey.ec, group) == 0)

			goto err;

		EC_GROUP_free(group);

		}

#endif

	return(1);

err:

	return(0);

	}

EXPORT_C int EVP_PKEY_missing_parameters(const EVP_PKEY *pkey)

	{

#ifndef OPENSSL_NO_DSA

	if (pkey->type == EVP_PKEY_DSA)

		{

		DSA *dsa;

		dsa=pkey->pkey.dsa;

		if ((dsa->p == NULL) || (dsa->q == NULL) || (dsa->g == NULL))

			return(1);

		}

#endif

#ifndef OPENSSL_NO_EC

	if (pkey->type == EVP_PKEY_EC)

		{

		if (EC_KEY_get0_group(pkey->pkey.ec) == NULL)

			return(1);

		}

#endif

	return(0);

	}

EXPORT_C int EVP_PKEY_cmp_parameters(const EVP_PKEY *a, const EVP_PKEY *b)

	{

#ifndef OPENSSL_NO_DSA

	if ((a->type == EVP_PKEY_DSA) && (b->type == EVP_PKEY_DSA))

		{

		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);

		}

#endif

#ifndef OPENSSL_NO_EC

	if (a->type == EVP_PKEY_EC && b->type == EVP_PKEY_EC)

		{

		const EC_GROUP *group_a = EC_KEY_get0_group(a->pkey.ec),

		               *group_b = EC_KEY_get0_group(b->pkey.ec);

		if (EC_GROUP_cmp(group_a, group_b, NULL))

			return 0;

		else

			return 1;

		}

#endif

	return(-1);

	}

EXPORT_C int EVP_PKEY_cmp(const EVP_PKEY *a, const EVP_PKEY *b)

	{

	if (a->type != b->type)

		return -1;

	if (EVP_PKEY_cmp_parameters(a, b) == 0)

		return 0;

	switch (a->type)

		{

#ifndef OPENSSL_NO_RSA

	case EVP_PKEY_RSA:

		if (BN_cmp(b->pkey.rsa->n,a->pkey.rsa->n) != 0

			|| BN_cmp(b->pkey.rsa->e,a->pkey.rsa->e) != 0)

			return 0;

		break;

#endif

#ifndef OPENSSL_NO_DSA

	case EVP_PKEY_DSA:

		if (BN_cmp(b->pkey.dsa->pub_key,a->pkey.dsa->pub_key) != 0)

			return 0;

		break;

#endif

#ifndef OPENSSL_NO_EC

	case EVP_PKEY_EC:

		{

		int  r;

		const EC_GROUP *group = EC_KEY_get0_group(b->pkey.ec);

		const EC_POINT *pa = EC_KEY_get0_public_key(a->pkey.ec),

		               *pb = EC_KEY_get0_public_key(b->pkey.ec);

		r = EC_POINT_cmp(group, pa, pb, NULL);

		if (r != 0)

			{

			if (r == 1)

				return 0;

			else

				return -2;

			}

		}

 		break;

#endif

#ifndef OPENSSL_NO_DH

	case EVP_PKEY_DH:

		return -2;

#endif

	default:

		return -2;

		}

	return 1;

	}

EXPORT_C EVP_PKEY *EVP_PKEY_new(void)

	{

	EVP_PKEY *ret;

	ret=(EVP_PKEY *)OPENSSL_malloc(sizeof(EVP_PKEY));

	if (ret == NULL)

		{

		EVPerr(EVP_F_EVP_PKEY_NEW,ERR_R_MALLOC_FAILURE);

		return(NULL);

		}

	ret->type=EVP_PKEY_NONE;

	ret->references=1;

	ret->pkey.ptr=NULL;

	ret->attributes=NULL;

	ret->save_parameters=1;

	return(ret);

	}

EXPORT_C int EVP_PKEY_assign(EVP_PKEY *pkey, int type, char *key)

	{

	if (pkey == NULL) return(0);

	if (pkey->pkey.ptr != NULL)

		EVP_PKEY_free_it(pkey);

	pkey->type=EVP_PKEY_type(type);

	pkey->save_type=type;

	pkey->pkey.ptr=key;

	return(key != NULL);

	}

#ifndef OPENSSL_NO_RSA

EXPORT_C int EVP_PKEY_set1_RSA(EVP_PKEY *pkey, RSA *key)

{

	int ret = EVP_PKEY_assign_RSA(pkey, key);

	if(ret)

		RSA_up_ref(key);

	return ret;

}

EXPORT_C RSA *EVP_PKEY_get1_RSA(EVP_PKEY *pkey)

	{

	if(pkey->type != EVP_PKEY_RSA) {

		EVPerr(EVP_F_EVP_PKEY_GET1_RSA, EVP_R_EXPECTING_AN_RSA_KEY);

		return NULL;

	}

	RSA_up_ref(pkey->pkey.rsa);

	return pkey->pkey.rsa;

}

#endif

#ifndef OPENSSL_NO_DSA

EXPORT_C int EVP_PKEY_set1_DSA(EVP_PKEY *pkey, DSA *key)

{

	int ret = EVP_PKEY_assign_DSA(pkey, key);

	if(ret)

		DSA_up_ref(key);

	return ret;

}

EXPORT_C DSA *EVP_PKEY_get1_DSA(EVP_PKEY *pkey)

	{

	if(pkey->type != EVP_PKEY_DSA) {

		EVPerr(EVP_F_EVP_PKEY_GET1_DSA, EVP_R_EXPECTING_A_DSA_KEY);

		return NULL;

	}

	DSA_up_ref(pkey->pkey.dsa);

	return pkey->pkey.dsa;

}

#endif

#ifndef OPENSSL_NO_EC

EXPORT_C int EVP_PKEY_set1_EC_KEY(EVP_PKEY *pkey, EC_KEY *key)

{

	int ret = EVP_PKEY_assign_EC_KEY(pkey,key);

	if (ret)

		EC_KEY_up_ref(key);

	return ret;

}

EXPORT_C EC_KEY *EVP_PKEY_get1_EC_KEY(EVP_PKEY *pkey)

{

	if (pkey->type != EVP_PKEY_EC)

	{

		EVPerr(EVP_F_EVP_PKEY_GET1_EC_KEY, EVP_R_EXPECTING_A_EC_KEY);

		return NULL;

	}

	EC_KEY_up_ref(pkey->pkey.ec);

	return pkey->pkey.ec;

}

#endif

#ifndef OPENSSL_NO_DH

EXPORT_C int EVP_PKEY_set1_DH(EVP_PKEY *pkey, DH *key)

{

	int ret = EVP_PKEY_assign_DH(pkey, key);

	if(ret)

		DH_up_ref(key);

	return ret;

}

EXPORT_C DH *EVP_PKEY_get1_DH(EVP_PKEY *pkey)

	{

	if(pkey->type != EVP_PKEY_DH) {

		EVPerr(EVP_F_EVP_PKEY_GET1_DH, EVP_R_EXPECTING_A_DH_KEY);

		return NULL;

	}

	DH_up_ref(pkey->pkey.dh);

	return pkey->pkey.dh;

}

#endif

EXPORT_C int EVP_PKEY_type(int type)

	{

	switch (type)

		{

	case EVP_PKEY_RSA:

	case EVP_PKEY_RSA2:

		return(EVP_PKEY_RSA);

	case EVP_PKEY_DSA:

	case EVP_PKEY_DSA1:

	case EVP_PKEY_DSA2:

	case EVP_PKEY_DSA3:

	case EVP_PKEY_DSA4:

		return(EVP_PKEY_DSA);

	case EVP_PKEY_DH:

		return(EVP_PKEY_DH);

	case EVP_PKEY_EC:

		return(EVP_PKEY_EC);

	default:

		return(NID_undef);

		}

	}

EXPORT_C void EVP_PKEY_free(EVP_PKEY *x)

	{

	int i;

	if (x == NULL) return;

	i=CRYPTO_add(&x->references,-1,CRYPTO_LOCK_EVP_PKEY);

#ifdef REF_PRINT

	REF_PRINT("EVP_PKEY",x);

#endif

	if (i > 0) return;

#ifdef REF_CHECK

	if (i < 0)

		{

		fprintf(stderr,"EVP_PKEY_free, bad reference count\n");

		abort();

		}

#endif

	EVP_PKEY_free_it(x);

	if (x->attributes)

		sk_X509_ATTRIBUTE_pop_free(x->attributes, X509_ATTRIBUTE_free);

	OPENSSL_free(x);

	}

static void EVP_PKEY_free_it(EVP_PKEY *x)

	{

	switch (x->type)

		{

#ifndef OPENSSL_NO_RSA

	case EVP_PKEY_RSA:

	case EVP_PKEY_RSA2:

		RSA_free(x->pkey.rsa);

		break;

#endif

#ifndef OPENSSL_NO_DSA

	case EVP_PKEY_DSA:

	case EVP_PKEY_DSA2:

	case EVP_PKEY_DSA3:

	case EVP_PKEY_DSA4:

		DSA_free(x->pkey.dsa);

		break;

#endif

#ifndef OPENSSL_NO_EC

	case EVP_PKEY_EC:

		EC_KEY_free(x->pkey.ec);

		break;

#endif

#ifndef OPENSSL_NO_DH

	case EVP_PKEY_DH:

		DH_free(x->pkey.dh);

		break;

#endif

		}

	}