/* crypto/asn1/d2i_pr.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/evp.h>

 #include <openssl/objects.h>

 #include <openssl/asn1.h>

 #ifndef OPENSSL_NO_RSA

 #include <openssl/rsa.h>

 #endif

 #ifndef OPENSSL_NO_DSA

 #include <openssl/dsa.h>

 #endif

 #ifndef OPENSSL_NO_EC

 #include <openssl/ec.h>

 #endif

 EXPORT_C EVP_PKEY *d2i_PrivateKey(int type, EVP_PKEY **a, const unsigned char **pp,

 	     long length)

 	{

 	EVP_PKEY *ret;

 	if ((a == NULL) || (*a == NULL))

 		{

 		if ((ret=EVP_PKEY_new()) == NULL)

 			{

 			ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_EVP_LIB);

 			return(NULL);

 			}

 		}

 	else	ret= *a;

 	ret->save_type=type;

 	ret->type=EVP_PKEY_type(type);

 	switch (ret->type)

 		{

 #ifndef OPENSSL_NO_RSA

 	case EVP_PKEY_RSA:

 		if ((ret->pkey.rsa=d2i_RSAPrivateKey(NULL,

 			(const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */

 			{

 			ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);

 			goto err;

 			}

 		break;

 #endif

 #ifndef OPENSSL_NO_DSA

 	case EVP_PKEY_DSA:

 		if ((ret->pkey.dsa=d2i_DSAPrivateKey(NULL,

 			(const unsigned char **)pp,length)) == NULL) /* TMP UGLY CAST */

 			{

 			ASN1err(ASN1_F_D2I_PRIVATEKEY,ERR_R_ASN1_LIB);

 			goto err;

 			}

 		break;

 #endif

 #ifndef OPENSSL_NO_EC

 	case EVP_PKEY_EC:

 		if ((ret->pkey.ec = d2i_ECPrivateKey(NULL, 

 			(const unsigned char **)pp, length)) == NULL)

 			{

 			ASN1err(ASN1_F_D2I_PRIVATEKEY, ERR_R_ASN1_LIB);

 			goto err;

 			}

 		break;

 #endif

 	default:

 		ASN1err(ASN1_F_D2I_PRIVATEKEY,ASN1_R_UNKNOWN_PUBLIC_KEY_TYPE);

 		goto err;

 		/* break; */

 		}

 	if (a != NULL) (*a)=ret;

 	return(ret);

 err:

 	if ((ret != NULL) && ((a == NULL) || (*a != ret))) EVP_PKEY_free(ret);

 	return(NULL);

 	}

 /* This works like d2i_PrivateKey() except it automatically works out the type */

 EXPORT_C EVP_PKEY *d2i_AutoPrivateKey(EVP_PKEY **a, const unsigned char **pp,

 	     long length)

 {

 	STACK_OF(ASN1_TYPE) *inkey;

 	const unsigned char *p;

 	int keytype;

 	p = *pp;

 	/* Dirty trick: read in the ASN1 data into a STACK_OF(ASN1_TYPE):

 	 * by analyzing it we can determine the passed structure: this

 	 * assumes the input is surrounded by an ASN1 SEQUENCE.

 	 */

 	inkey = d2i_ASN1_SET_OF_ASN1_TYPE(NULL, &p, length, d2i_ASN1_TYPE, 

 			ASN1_TYPE_free, V_ASN1_SEQUENCE, V_ASN1_UNIVERSAL);

 	/* Since we only need to discern "traditional format" RSA and DSA

 	 * keys we can just count the elements.

          */

 	if(sk_ASN1_TYPE_num(inkey) == 6) 

 		keytype = EVP_PKEY_DSA;

 	else if (sk_ASN1_TYPE_num(inkey) == 4)

 		keytype = EVP_PKEY_EC;

 	else keytype = EVP_PKEY_RSA;

 	sk_ASN1_TYPE_pop_free(inkey, ASN1_TYPE_free);

 	return d2i_PrivateKey(keytype, a, pp, length);

 }