/* p12_crpt.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>

/* PKCS#12 specific PBE functions */

EXPORT_C void PKCS12_PBE_add(void)
{
#ifndef OPENSSL_NO_RC4
EVP_PBE_alg_add(NID_pbe_WithSHA1And128BitRC4, EVP_rc4(), EVP_sha1(),
							 PKCS12_PBE_keyivgen);
EVP_PBE_alg_add(NID_pbe_WithSHA1And40BitRC4, EVP_rc4_40(), EVP_sha1(),
							 PKCS12_PBE_keyivgen);
#endif
#ifndef OPENSSL_NO_DES
EVP_PBE_alg_add(NID_pbe_WithSHA1And3_Key_TripleDES_CBC,
		 	EVP_des_ede3_cbc(), EVP_sha1(), PKCS12_PBE_keyivgen);
EVP_PBE_alg_add(NID_pbe_WithSHA1And2_Key_TripleDES_CBC, 
			EVP_des_ede_cbc(), EVP_sha1(), PKCS12_PBE_keyivgen);
#endif
#ifndef OPENSSL_NO_RC2
EVP_PBE_alg_add(NID_pbe_WithSHA1And128BitRC2_CBC, EVP_rc2_cbc(),
					EVP_sha1(), PKCS12_PBE_keyivgen);
EVP_PBE_alg_add(NID_pbe_WithSHA1And40BitRC2_CBC, EVP_rc2_40_cbc(),
					EVP_sha1(), PKCS12_PBE_keyivgen);
#endif
}

EXPORT_C int PKCS12_PBE_keyivgen(EVP_CIPHER_CTX *ctx, const char *pass, int passlen,
		ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md, int en_de)
{
	PBEPARAM *pbe;
	int saltlen, iter, ret;
	unsigned char *salt;
	const unsigned char *pbuf;
	unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];

	/* Extract useful info from parameter */
	if (param == NULL || param->type != V_ASN1_SEQUENCE ||
	    param->value.sequence == NULL) {
		PKCS12err(PKCS12_F_PKCS12_PBE_KEYIVGEN,PKCS12_R_DECODE_ERROR);
		return 0;
	}

	pbuf = param->value.sequence->data;
	if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
		PKCS12err(PKCS12_F_PKCS12_PBE_KEYIVGEN,PKCS12_R_DECODE_ERROR);
		return 0;
	}

	if (!pbe->iter) iter = 1;
	else iter = ASN1_INTEGER_get (pbe->iter);
	salt = pbe->salt->data;
	saltlen = pbe->salt->length;
	if (!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_KEY_ID,
			     iter, EVP_CIPHER_key_length(cipher), key, md)) {
		PKCS12err(PKCS12_F_PKCS12_PBE_KEYIVGEN,PKCS12_R_KEY_GEN_ERROR);
		PBEPARAM_free(pbe);
		return 0;
	}
	if (!PKCS12_key_gen (pass, passlen, salt, saltlen, PKCS12_IV_ID,
				iter, EVP_CIPHER_iv_length(cipher), iv, md)) {
		PKCS12err(PKCS12_F_PKCS12_PBE_KEYIVGEN,PKCS12_R_IV_GEN_ERROR);
		PBEPARAM_free(pbe);
		return 0;
	}
	PBEPARAM_free(pbe);
	ret = EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, en_de);
	OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
	OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
	return ret;
}
