/* p12_decr.c */

 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL

  * project 1999.

  */

 /* ====================================================================

  * Copyright (c) 1999 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/pkcs12.h>

 /* Define this to dump decrypted output to files called DERnnn */

 /*#define DEBUG_DECRYPT*/

 /* Encrypt/Decrypt a buffer based on password and algor, result in a

  * OPENSSL_malloc'ed buffer

  */

 EXPORT_C unsigned char * PKCS12_pbe_crypt(X509_ALGOR *algor, const char *pass,

 	     int passlen, unsigned char *in, int inlen, unsigned char **data,

 	     int *datalen, int en_de)

 {

 	unsigned char *out;

 	int outlen, i;

 	EVP_CIPHER_CTX ctx;

 	EVP_CIPHER_CTX_init(&ctx);

 	/* Decrypt data */

         if (!EVP_PBE_CipherInit(algor->algorithm, pass, passlen,

 					 algor->parameter, &ctx, en_de)) {

 		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_ALGOR_CIPHERINIT_ERROR);

 		return NULL;

 	}

 	if(!(out = OPENSSL_malloc(inlen + EVP_CIPHER_CTX_block_size(&ctx)))) {

 		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,ERR_R_MALLOC_FAILURE);

 		goto err;

 	}

 	EVP_CipherUpdate(&ctx, out, &i, in, inlen);

 	outlen = i;

 	if(!EVP_CipherFinal_ex(&ctx, out + i, &i)) {

 		OPENSSL_free(out);

 		out = NULL;

 		PKCS12err(PKCS12_F_PKCS12_PBE_CRYPT,PKCS12_R_PKCS12_CIPHERFINAL_ERROR);

 		goto err;

 	}

 	outlen += i;

 	if (datalen) *datalen = outlen;

 	if (data) *data = out;

 	err:

 	EVP_CIPHER_CTX_cleanup(&ctx);

 	return out;

 }

 /* Decrypt an OCTET STRING and decode ASN1 structure 

  * if zbuf set zero buffer after use.

  */

 EXPORT_C void * PKCS12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,

 	     const char *pass, int passlen, ASN1_OCTET_STRING *oct, int zbuf)

 {

 	unsigned char *out;

 	const unsigned char *p;

 	void *ret;

 	int outlen;

 	if (!PKCS12_pbe_crypt(algor, pass, passlen, oct->data, oct->length,

 			       &out, &outlen, 0)) {

 		PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_PKCS12_PBE_CRYPT_ERROR);

 		return NULL;

 	}

 	p = out;

 #ifdef DEBUG_DECRYPT

 	{

 		FILE *op;

 		char fname[30];

 		static int fnm = 1;

 		sprintf(fname, "DER%d", fnm++);

 		op = fopen(fname, "wb");

 		fwrite (p, 1, outlen, op);

 		fclose(op);

 	}

 #endif

 	ret = ASN1_item_d2i(NULL, &p, outlen, it);

 	if (zbuf) OPENSSL_cleanse(out, outlen);

 	if(!ret) PKCS12err(PKCS12_F_PKCS12_ITEM_DECRYPT_D2I,PKCS12_R_DECODE_ERROR);

 	OPENSSL_free(out);

 	return ret;

 }

 /* Encode ASN1 structure and encrypt, return OCTET STRING 

  * if zbuf set zero encoding.

  */

 EXPORT_C ASN1_OCTET_STRING *PKCS12_item_i2d_encrypt(X509_ALGOR *algor, const ASN1_ITEM *it,

 				       const char *pass, int passlen,

 				       void *obj, int zbuf)

 {

 	ASN1_OCTET_STRING *oct;

 	unsigned char *in = NULL;

 	int inlen;

 	if (!(oct = M_ASN1_OCTET_STRING_new ())) {

 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,ERR_R_MALLOC_FAILURE);

 		return NULL;

 	}

 	inlen = ASN1_item_i2d(obj, &in, it);

 	if (!in) {

 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCODE_ERROR);

 		return NULL;

 	}

 	if (!PKCS12_pbe_crypt(algor, pass, passlen, in, inlen, &oct->data,

 				 &oct->length, 1)) {

 		PKCS12err(PKCS12_F_PKCS12_ITEM_I2D_ENCRYPT,PKCS12_R_ENCRYPT_ERROR);

 		OPENSSL_free(in);

 		return NULL;

 	}

 	if (zbuf) OPENSSL_cleanse(in, inlen);

 	OPENSSL_free(in);

 	return oct;

 }

 IMPLEMENT_PKCS12_STACK_OF(PKCS7)