text: /* $OpenBSD: p12_crpt.c,v 1.14 2017/01/29 17:49:23 beck Exp $ */
  /* 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 <string.h>
  
  #include <openssl/err.h>
  #include <openssl/pkcs12.h>
  
  /* PKCS#12 PBE algorithms now in static table */
  
  void
  PKCS12_PBE_add(void)
  {
  }
  
  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) {
  		PKCS12error(PKCS12_R_DECODE_ERROR);
  		return 0;
  	}
  
  	pbuf = param->value.sequence->data;
  	if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
  		PKCS12error(PKCS12_R_DECODE_ERROR);
  		return 0;
  	}
  
  	if (!pbe->iter)
  		iter = 1;
  	else if ((iter = ASN1_INTEGER_get(pbe->iter)) <= 0) {
  		PKCS12error(PKCS12_R_DECODE_ERROR);
  		PBEPARAM_free(pbe);
  		return 0;
  	}
  	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)) {
  		PKCS12error(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)) {
  		PKCS12error(PKCS12_R_IV_GEN_ERROR);
  		PBEPARAM_free(pbe);
  		return 0;
  	}
  	PBEPARAM_free(pbe);
  	ret = EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, en_de);
  	explicit_bzero(key, EVP_MAX_KEY_LENGTH);
  	explicit_bzero(iv, EVP_MAX_IV_LENGTH);
  	return ret;
  }
  