release/src/router/openssl/crypto/evp/p5_crpt.c

   1 /* p5_crpt.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) 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 "cryptlib.h"
  62 #include <openssl/x509.h>
  63 #include <openssl/evp.h>
  64
  65 /* Doesn't do anything now: Builtin PBE algorithms in static table.
  66  */
  67
  68 void PKCS5_PBE_add(void)
  69 {
  70 }
  71
  72 int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
  73                          ASN1_TYPE *param, const EVP_CIPHER *cipher, const EVP_MD *md,
  74                          int en_de)
  75 {
  76         EVP_MD_CTX ctx;
  77         unsigned char md_tmp[EVP_MAX_MD_SIZE];
  78         unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
  79         int i;
  80         PBEPARAM *pbe;
  81         int saltlen, iter;
  82         unsigned char *salt;
  83         const unsigned char *pbuf;
  84         int mdsize;
  85         int rv = 0;
  86         EVP_MD_CTX_init(&ctx);
  87
  88         /* Extract useful info from parameter */
  89         if (param == NULL || param->type != V_ASN1_SEQUENCE ||
  90             param->value.sequence == NULL) {
  91                 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
  92                 return 0;
  93         }
  94
  95         pbuf = param->value.sequence->data;
  96         if (!(pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length))) {
  97                 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN,EVP_R_DECODE_ERROR);
  98                 return 0;
  99         }
 100
 101         if (!pbe->iter) iter = 1;
 102         else iter = ASN1_INTEGER_get (pbe->iter);
 103         salt = pbe->salt->data;
 104         saltlen = pbe->salt->length;
 105
 106         if(!pass) passlen = 0;
 107         else if(passlen == -1) passlen = strlen(pass);
 108
 109         if (!EVP_DigestInit_ex(&ctx, md, NULL))
 110                 goto err;
 111         if (!EVP_DigestUpdate(&ctx, pass, passlen))
 112                 goto err;
 113         if (!EVP_DigestUpdate(&ctx, salt, saltlen))
 114                 goto err;
 115         PBEPARAM_free(pbe);
 116         if (!EVP_DigestFinal_ex(&ctx, md_tmp, NULL))
 117                 goto err;
 118         mdsize = EVP_MD_size(md);
 119         if (mdsize < 0)
 120             return 0;
 121         for (i = 1; i < iter; i++) {
 122                 if (!EVP_DigestInit_ex(&ctx, md, NULL))
 123                         goto err;
 124                 if (!EVP_DigestUpdate(&ctx, md_tmp, mdsize))
 125                         goto err;
 126                 if (!EVP_DigestFinal_ex (&ctx, md_tmp, NULL))
 127                         goto err;
 128         }
 129         OPENSSL_assert(EVP_CIPHER_key_length(cipher) <= (int)sizeof(md_tmp));
 130         memcpy(key, md_tmp, EVP_CIPHER_key_length(cipher));
 131         OPENSSL_assert(EVP_CIPHER_iv_length(cipher) <= 16);
 132         memcpy(iv, md_tmp + (16 - EVP_CIPHER_iv_length(cipher)),
 133                                                  EVP_CIPHER_iv_length(cipher));
 134         if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
 135                 goto err;
 136         OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
 137         OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
 138         OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
 139         rv = 1;
 140         err:
 141         EVP_MD_CTX_cleanup(&ctx);
 142         return rv;
 143 }