crypto/evp/p5_crpt.c

   1 /* p5_crpt.c */
   2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
   3  * project 1999.
   4  */
   5 /* ====================================================================
   6  * Copyright (c) 1999 The OpenSSL Project.  All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  *
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in
  17  *    the documentation and/or other materials provided with the
  18  *    distribution.
  19  *
  20  * 3. All advertising materials mentioning features or use of this
  21  *    software must display the following acknowledgment:
  22  *    "This product includes software developed by the OpenSSL Project
  23  *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
  24  *
  25  * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
  26  *    endorse or promote products derived from this software without
  27  *    prior written permission. For written permission, please contact
  28  *    licensing@OpenSSL.org.
  29  *
  30  * 5. Products derived from this software may not be called "OpenSSL"
  31  *    nor may "OpenSSL" appear in their names without prior written
  32  *    permission of the OpenSSL Project.
  33  *
  34  * 6. Redistributions of any form whatsoever must retain the following
  35  *    acknowledgment:
  36  *    "This product includes software developed by the OpenSSL Project
  37  *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
  38  *
  39  * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
  40  * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  41  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
  43  * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  44  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  45  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  46  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  48  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  49  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  50  * OF THE POSSIBILITY OF SUCH DAMAGE.
  51  * ====================================================================
  52  *
  53  * This product includes cryptographic software written by Eric Young
  54  * (eay@cryptsoft.com).  This product includes software written by Tim
  55  * Hudson (tjh@cryptsoft.com).
  56  *
  57  */
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <openssl/x509.h>
  62 #include <openssl/evp.h>
  63 #include "cryptlib.h"
  64
  65 /* PKCS#5 v1.5 compatible PBE functions: see PKCS#5 v2.0 for more info.
  66  */
  67
  68 void PKCS5_PBE_add(void)
  69 {
  70 #ifndef NO_DES
  71 EVP_PBE_alg_add(NID_pbeWithMD5AndDES_CBC, EVP_des_cbc(), EVP_md5(),
  72                                                          PKCS5_PBE_keyivgen);
  73 EVP_PBE_alg_add(NID_pbeWithMD2AndDES_CBC, EVP_des_cbc(), EVP_md2(),
  74                                                          PKCS5_PBE_keyivgen);
  75 EVP_PBE_alg_add(NID_pbeWithSHA1AndDES_CBC, EVP_des_cbc(), EVP_sha1(),
  76                                                          PKCS5_PBE_keyivgen);
  77 #endif
  78 #ifndef NO_RC2
  79 EVP_PBE_alg_add(NID_pbeWithMD5AndRC2_CBC, EVP_rc2_64_cbc(), EVP_md5(),
  80                                                          PKCS5_PBE_keyivgen);
  81 EVP_PBE_alg_add(NID_pbeWithMD2AndRC2_CBC, EVP_rc2_64_cbc(), EVP_md2(),
  82                                                          PKCS5_PBE_keyivgen);
  83 EVP_PBE_alg_add(NID_pbeWithSHA1AndRC2_CBC, EVP_rc2_64_cbc(), EVP_sha1(),
  84                                                          PKCS5_PBE_keyivgen);
  85 #endif
  86 EVP_PBE_alg_add(NID_pbes2, NULL, NULL, PKCS5_v2_PBE_keyivgen);
  87 }
  88
  89 int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
  90                          ASN1_TYPE *param, EVP_CIPHER *cipher, EVP_MD *md,
  91                          int en_de)
  92 {
  93         EVP_MD_CTX ctx;
  94         unsigned char md_tmp[EVP_MAX_MD_SIZE];
  95         unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
  96         int i;
  97         PBEPARAM *pbe;
  98         int saltlen, iter;
  99         unsigned char *salt, *pbuf;
 100
 101         /* Extract useful info from parameter */
 102         pbuf = param->value.sequence->data;
 103         if (!param || (param->type != V_ASN1_SEQUENCE) ||
 104            !(pbe = d2i_PBEPARAM (NULL, &pbuf, param->value.sequence->length))) {
 105                 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
 106                 return 0;
 107         }
 108
 109         if (!pbe->iter) iter = 1;
 110         else iter = ASN1_INTEGER_get (pbe->iter);
 111         salt = pbe->salt->data;
 112         saltlen = pbe->salt->length;
 113
 114         EVP_DigestInit (&ctx, md);
 115         EVP_DigestUpdate (&ctx, pass, passlen);
 116         EVP_DigestUpdate (&ctx, salt, saltlen);
 117         PBEPARAM_free(pbe);
 118         EVP_DigestFinal (&ctx, md_tmp, NULL);
 119         for (i = 1; i < iter; i++) {
 120                 EVP_DigestInit(&ctx, md);
 121                 EVP_DigestUpdate(&ctx, md_tmp, EVP_MD_size(md));
 122                 EVP_DigestFinal (&ctx, md_tmp, NULL);
 123         }
 124         memcpy (key, md_tmp, EVP_CIPHER_key_length(cipher));
 125         memcpy (iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
 126                                                  EVP_CIPHER_iv_length(cipher));
 127         EVP_CipherInit(cctx, cipher, key, iv, en_de);
 128         memset(md_tmp, 0, EVP_MAX_MD_SIZE);
 129         memset(key, 0, EVP_MAX_KEY_LENGTH);
 130         memset(iv, 0, EVP_MAX_IV_LENGTH);
 131         return 1;
 132 }