release/src/router/openssl/crypto/asn1/p5_pbev2.c

   1 /* p5_pbev2.c */
   2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
   3  * project 1999-2004.
   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 "cryptlib.h"
  61 #include <openssl/asn1t.h>
  62 #include <openssl/x509.h>
  63 #include <openssl/rand.h>
  64
  65 /* PKCS#5 v2.0 password based encryption structures */
  66
  67 ASN1_SEQUENCE(PBE2PARAM) = {
  68         ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
  69         ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
  70 } ASN1_SEQUENCE_END(PBE2PARAM)
  71
  72 IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
  73
  74 ASN1_SEQUENCE(PBKDF2PARAM) = {
  75         ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
  76         ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
  77         ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
  78         ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
  79 } ASN1_SEQUENCE_END(PBKDF2PARAM)
  80
  81 IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
  82
  83 /* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
  84  * yes I know this is horrible!
  85  *
  86  * Extended version to allow application supplied PRF NID and IV.
  87  */
  88
  89 X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
  90                                  unsigned char *salt, int saltlen,
  91                                  unsigned char *aiv, int prf_nid)
  92 {
  93         X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
  94         int alg_nid, keylen;
  95         EVP_CIPHER_CTX ctx;
  96         unsigned char iv[EVP_MAX_IV_LENGTH];
  97         PBE2PARAM *pbe2 = NULL;
  98         ASN1_OBJECT *obj;
  99
 100         alg_nid = EVP_CIPHER_type(cipher);
 101         if(alg_nid == NID_undef) {
 102                 ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
 103                                 ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
 104                 goto err;
 105         }
 106         obj = OBJ_nid2obj(alg_nid);
 107
 108         if(!(pbe2 = PBE2PARAM_new())) goto merr;
 109
 110         /* Setup the AlgorithmIdentifier for the encryption scheme */
 111         scheme = pbe2->encryption;
 112
 113         scheme->algorithm = obj;
 114         if(!(scheme->parameter = ASN1_TYPE_new())) goto merr;
 115
 116         /* Create random IV */
 117         if (EVP_CIPHER_iv_length(cipher))
 118                 {
 119                 if (aiv)
 120                         memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher));
 121                 else if (RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0)
 122                         goto err;
 123                 }
 124
 125         EVP_CIPHER_CTX_init(&ctx);
 126
 127         /* Dummy cipherinit to just setup the IV, and PRF */
 128         if (!EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0))
 129                 goto err;
 130         if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) {
 131                 ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,
 132                                         ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
 133                 EVP_CIPHER_CTX_cleanup(&ctx);
 134                 goto err;
 135         }
 136         /* If prf NID unspecified see if cipher has a preference.
 137          * An error is OK here: just means use default PRF.
 138          */
 139         if ((prf_nid == -1) &&
 140         EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0)
 141                 {
 142                 ERR_clear_error();
 143                 prf_nid = NID_hmacWithSHA1;
 144                 }
 145         EVP_CIPHER_CTX_cleanup(&ctx);
 146
 147         /* If its RC2 then we'd better setup the key length */
 148
 149         if(alg_nid == NID_rc2_cbc)
 150                 keylen = EVP_CIPHER_key_length(cipher);
 151         else
 152                 keylen = -1;
 153
 154         /* Setup keyfunc */
 155
 156         X509_ALGOR_free(pbe2->keyfunc);
 157
 158         pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen);
 159
 160         if (!pbe2->keyfunc)
 161                 goto merr;
 162
 163         /* Now set up top level AlgorithmIdentifier */
 164
 165         if(!(ret = X509_ALGOR_new())) goto merr;
 166         if(!(ret->parameter = ASN1_TYPE_new())) goto merr;
 167
 168         ret->algorithm = OBJ_nid2obj(NID_pbes2);
 169
 170         /* Encode PBE2PARAM into parameter */
 171
 172         if(!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM),
 173                                  &ret->parameter->value.sequence)) goto merr;
 174         ret->parameter->type = V_ASN1_SEQUENCE;
 175
 176         PBE2PARAM_free(pbe2);
 177         pbe2 = NULL;
 178
 179         return ret;
 180
 181         merr:
 182         ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,ERR_R_MALLOC_FAILURE);
 183
 184         err:
 185         PBE2PARAM_free(pbe2);
 186         /* Note 'scheme' is freed as part of pbe2 */
 187         X509_ALGOR_free(kalg);
 188         X509_ALGOR_free(ret);
 189
 190         return NULL;
 191
 192 }
 193
 194 X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
 195                                  unsigned char *salt, int saltlen)
 196         {
 197         return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1);
 198         }
 199
 200 X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen,
 201                                 int prf_nid, int keylen)
 202         {
 203         X509_ALGOR *keyfunc = NULL;
 204         PBKDF2PARAM *kdf = NULL;
 205         ASN1_OCTET_STRING *osalt = NULL;
 206
 207         if(!(kdf = PBKDF2PARAM_new()))
 208                 goto merr;
 209         if(!(osalt = M_ASN1_OCTET_STRING_new()))
 210                 goto merr;
 211
 212         kdf->salt->value.octet_string = osalt;
 213         kdf->salt->type = V_ASN1_OCTET_STRING;
 214
 215         if (!saltlen)
 216                 saltlen = PKCS5_SALT_LEN;
 217         if (!(osalt->data = OPENSSL_malloc (saltlen)))
 218                 goto merr;
 219
 220         osalt->length = saltlen;
 221
 222         if (salt)
 223                 memcpy (osalt->data, salt, saltlen);
 224         else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0)
 225                 goto merr;
 226
 227         if(iter <= 0)
 228                 iter = PKCS5_DEFAULT_ITER;
 229
 230         if(!ASN1_INTEGER_set(kdf->iter, iter))
 231                 goto merr;
 232
 233         /* If have a key len set it up */
 234
 235         if(keylen > 0)
 236                 {
 237                 if(!(kdf->keylength = M_ASN1_INTEGER_new()))
 238                         goto merr;
 239                 if(!ASN1_INTEGER_set (kdf->keylength, keylen))
 240                         goto merr;
 241                 }
 242
 243         /* prf can stay NULL if we are using hmacWithSHA1 */
 244         if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1)
 245                 {
 246                 kdf->prf = X509_ALGOR_new();
 247                 if (!kdf->prf)
 248                         goto merr;
 249                 X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid),
 250                                         V_ASN1_NULL, NULL);
 251                 }
 252
 253         /* Finally setup the keyfunc structure */
 254
 255         keyfunc = X509_ALGOR_new();
 256         if (!keyfunc)
 257                 goto merr;
 258
 259         keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
 260
 261         /* Encode PBKDF2PARAM into parameter of pbe2 */
 262
 263         if(!(keyfunc->parameter = ASN1_TYPE_new()))
 264                 goto merr;
 265
 266         if(!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM),
 267                          &keyfunc->parameter->value.sequence))
 268                 goto merr;
 269         keyfunc->parameter->type = V_ASN1_SEQUENCE;
 270
 271         PBKDF2PARAM_free(kdf);
 272         return keyfunc;
 273
 274         merr:
 275         ASN1err(ASN1_F_PKCS5_PBKDF2_SET,ERR_R_MALLOC_FAILURE);
 276         PBKDF2PARAM_free(kdf);
 277         X509_ALGOR_free(keyfunc);
 278         return NULL;
 279         }
 280