/* p5_crpt.c *//* Written by Dr Stephen N Henson (steve@openssl.org) 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 <stdlib.h>#include "cryptlib.h"#include <openssl/x509.h>#include <openssl/evp.h>/* PKCS#5 v1.5 compatible PBE functions: see PKCS#5 v2.0 for more info. */void PKCS5_PBE_add(void){#ifndef OPENSSL_NO_DES#  ifndef OPENSSL_NO_MD5EVP_PBE_alg_add(NID_pbeWithMD5AndDES_CBC, EVP_des_cbc(), EVP_md5(),							 PKCS5_PBE_keyivgen);#  endif#  ifndef OPENSSL_NO_MD2EVP_PBE_alg_add(NID_pbeWithMD2AndDES_CBC, EVP_des_cbc(), EVP_md2(),							 PKCS5_PBE_keyivgen);#  endif#  ifndef OPENSSL_NO_SHAEVP_PBE_alg_add(NID_pbeWithSHA1AndDES_CBC, EVP_des_cbc(), EVP_sha1(),							 PKCS5_PBE_keyivgen);#  endif#endif#ifndef OPENSSL_NO_RC2#  ifndef OPENSSL_NO_MD5EVP_PBE_alg_add(NID_pbeWithMD5AndRC2_CBC, EVP_rc2_64_cbc(), EVP_md5(),							 PKCS5_PBE_keyivgen);#  endif#  ifndef OPENSSL_NO_MD2EVP_PBE_alg_add(NID_pbeWithMD2AndRC2_CBC, EVP_rc2_64_cbc(), EVP_md2(),							 PKCS5_PBE_keyivgen);#  endif#  ifndef OPENSSL_NO_SHAEVP_PBE_alg_add(NID_pbeWithSHA1AndRC2_CBC, EVP_rc2_64_cbc(), EVP_sha1(),							 PKCS5_PBE_keyivgen);#  endif#endif#ifndef OPENSSL_NO_HMACEVP_PBE_alg_add(NID_pbes2, NULL, NULL, PKCS5_v2_PBE_keyivgen);#endif}int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,			 ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md,			 int en_de){	EVP_MD_CTX ctx;	unsigned char md_tmp[EVP_MAX_MD_SIZE];	unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];	int i;	PBEPARAM *pbe;	int saltlen, iter;	unsigned char *salt;	const unsigned char *pbuf;	/* Extract useful info from parameter */	if (param == NULL || param->type != V_ASN1_SEQUENCE ||	    param->value.sequence == NULL) {		EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);		return 0;	}	pbuf = param->value.sequence->data;	if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {		EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_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(!pass) passlen = 0;	else if(passlen == -1) passlen = strlen(pass);	EVP_MD_CTX_init(&ctx);	EVP_DigestInit_ex(&ctx, md, NULL);	EVP_DigestUpdate(&ctx, pass, passlen);	EVP_DigestUpdate(&ctx, salt, saltlen);	PBEPARAM_free(pbe);	EVP_DigestFinal_ex(&ctx, md_tmp, NULL);	for (i = 1; i < iter; i++) {		EVP_DigestInit_ex(&ctx, md, NULL);		EVP_DigestUpdate(&ctx, md_tmp, EVP_MD_size(md));		EVP_DigestFinal_ex (&ctx, md_tmp, NULL);	}	EVP_MD_CTX_cleanup(&ctx);	OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp));	memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher));	OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16);	memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),						 EVP_CIPHER_iv_length(cipher));	EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de);	OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);	OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);	OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);	return 1;}