net/http/des.cc

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "net/http/des.h"
   6
   7 #include "base/logging.h"
   8
   9 #if defined(USE_OPENSSL)
  10 #include <openssl/des.h>
  11 #include "crypto/openssl_util.h"
  12 #elif defined(USE_NSS)
  13 #include <nss.h>
  14 #include <pk11pub.h>
  15 #include "crypto/nss_util.h"
  16 #elif defined(OS_MACOSX)
  17 #include <CommonCrypto/CommonCryptor.h>
  18 #elif defined(OS_WIN)
  19 #include <windows.h>
  20 #include <wincrypt.h>
  21 #include "crypto/scoped_capi_types.h"
  22 #endif
  23
  24 // The Mac and Windows (CryptoAPI) versions of DESEncrypt are our own code.
  25 // DESSetKeyParity, DESMakeKey, and the Linux (NSS) version of DESEncrypt are
  26 // based on mozilla/security/manager/ssl/src/nsNTLMAuthModule.cpp,
  27 // CVS rev. 1.14.
  28
  29 /* ***** BEGIN LICENSE BLOCK *****
  30  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  31  *
  32  * The contents of this file are subject to the Mozilla Public License Version
  33  * 1.1 (the "License"); you may not use this file except in compliance with
  34  * the License. You may obtain a copy of the License at
  35  * http://www.mozilla.org/MPL/
  36  *
  37  * Software distributed under the License is distributed on an "AS IS" basis,
  38  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  39  * for the specific language governing rights and limitations under the
  40  * License.
  41  *
  42  * The Original Code is Mozilla.
  43  *
  44  * The Initial Developer of the Original Code is IBM Corporation.
  45  * Portions created by IBM Corporation are Copyright (C) 2003
  46  * IBM Corporation. All Rights Reserved.
  47  *
  48  * Contributor(s):
  49  *   Darin Fisher <darin@meer.net>
  50  *
  51  * Alternatively, the contents of this file may be used under the terms of
  52  * either the GNU General Public License Version 2 or later (the "GPL"), or
  53  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  54  * in which case the provisions of the GPL or the LGPL are applicable instead
  55  * of those above. If you wish to allow use of your version of this file only
  56  * under the terms of either the GPL or the LGPL, and not to allow others to
  57  * use your version of this file under the terms of the MPL, indicate your
  58  * decision by deleting the provisions above and replace them with the notice
  59  * and other provisions required by the GPL or the LGPL. If you do not delete
  60  * the provisions above, a recipient may use your version of this file under
  61  * the terms of any one of the MPL, the GPL or the LGPL.
  62  *
  63  * ***** END LICENSE BLOCK ***** */
  64
  65 // Set odd parity bit (in least significant bit position).
  66 static uint8 DESSetKeyParity(uint8 x) {
  67   if ((((x >> 7) ^ (x >> 6) ^ (x >> 5) ^
  68         (x >> 4) ^ (x >> 3) ^ (x >> 2) ^
  69         (x >> 1)) & 0x01) == 0) {
  70     x |= 0x01;
  71   } else {
  72     x &= 0xfe;
  73   }
  74   return x;
  75 }
  76
  77 namespace net {
  78
  79 void DESMakeKey(const uint8* raw, uint8* key) {
  80   key[0] = DESSetKeyParity(raw[0]);
  81   key[1] = DESSetKeyParity((raw[0] << 7) | (raw[1] >> 1));
  82   key[2] = DESSetKeyParity((raw[1] << 6) | (raw[2] >> 2));
  83   key[3] = DESSetKeyParity((raw[2] << 5) | (raw[3] >> 3));
  84   key[4] = DESSetKeyParity((raw[3] << 4) | (raw[4] >> 4));
  85   key[5] = DESSetKeyParity((raw[4] << 3) | (raw[5] >> 5));
  86   key[6] = DESSetKeyParity((raw[5] << 2) | (raw[6] >> 6));
  87   key[7] = DESSetKeyParity((raw[6] << 1));
  88 }
  89
  90 #if defined(USE_OPENSSL)
  91
  92 void DESEncrypt(const uint8* key, const uint8* src, uint8* hash) {
  93   crypto::EnsureOpenSSLInit();
  94
  95   DES_key_schedule ks;
  96   DES_set_key_unchecked(
  97       reinterpret_cast<const_DES_cblock*>(const_cast<uint8*>(key)), &ks);
  98
  99   DES_ecb_encrypt(reinterpret_cast<const_DES_cblock*>(const_cast<uint8*>(src)),
 100                   reinterpret_cast<DES_cblock*>(hash), &ks, DES_ENCRYPT);
 101 }
 102
 103 #elif defined(USE_NSS)
 104
 105 void DESEncrypt(const uint8* key, const uint8* src, uint8* hash) {
 106   CK_MECHANISM_TYPE cipher_mech = CKM_DES_ECB;
 107   PK11SlotInfo* slot = NULL;
 108   PK11SymKey* symkey = NULL;
 109   PK11Context* ctxt = NULL;
 110   SECItem key_item;
 111   SECItem* param = NULL;
 112   SECStatus rv;
 113   unsigned int n;
 114
 115   crypto::EnsureNSSInit();
 116
 117   slot = PK11_GetInternalSlot();
 118   if (!slot)
 119     goto done;
 120
 121   key_item.data = const_cast<uint8*>(key);
 122   key_item.len = 8;
 123   symkey = PK11_ImportSymKey(slot, cipher_mech,
 124                              PK11_OriginUnwrap, CKA_ENCRYPT,
 125                              &key_item, NULL);
 126   if (!symkey)
 127     goto done;
 128
 129   // No initialization vector required.
 130   param = PK11_ParamFromIV(cipher_mech, NULL);
 131   if (!param)
 132     goto done;
 133
 134   ctxt = PK11_CreateContextBySymKey(cipher_mech, CKA_ENCRYPT,
 135                                     symkey, param);
 136   if (!ctxt)
 137     goto done;
 138
 139   rv = PK11_CipherOp(ctxt, hash, reinterpret_cast<int*>(&n), 8,
 140                      const_cast<uint8*>(src), 8);
 141   if (rv != SECSuccess)
 142     goto done;
 143
 144   // TODO(wtc): Should this be PK11_Finalize?
 145   rv = PK11_DigestFinal(ctxt, hash+8, &n, 0);
 146   if (rv != SECSuccess)
 147     goto done;
 148
 149  done:
 150   if (ctxt)
 151     PK11_DestroyContext(ctxt, PR_TRUE);
 152   if (symkey)
 153     PK11_FreeSymKey(symkey);
 154   if (param)
 155     SECITEM_FreeItem(param, PR_TRUE);
 156   if (slot)
 157     PK11_FreeSlot(slot);
 158 }
 159
 160 #elif defined(OS_MACOSX)
 161
 162 void DESEncrypt(const uint8* key, const uint8* src, uint8* hash) {
 163   CCCryptorStatus status;
 164   size_t data_out_moved = 0;
 165   status = CCCrypt(kCCEncrypt, kCCAlgorithmDES, kCCOptionECBMode,
 166                    key, 8, NULL, src, 8, hash, 8, &data_out_moved);
 167   DCHECK(status == kCCSuccess);
 168   DCHECK(data_out_moved == 8);
 169 }
 170
 171 #elif defined(OS_WIN)
 172
 173 void DESEncrypt(const uint8* key, const uint8* src, uint8* hash) {
 174   crypto::ScopedHCRYPTPROV provider;
 175   if (!CryptAcquireContext(provider.receive(), NULL, NULL, PROV_RSA_FULL,
 176                            CRYPT_VERIFYCONTEXT))
 177     return;
 178
 179   {
 180     // Import the DES key.
 181     struct KeyBlob {
 182       BLOBHEADER header;
 183       DWORD key_size;
 184       BYTE key_data[8];
 185     };
 186     KeyBlob key_blob;
 187     key_blob.header.bType = PLAINTEXTKEYBLOB;
 188     key_blob.header.bVersion = CUR_BLOB_VERSION;
 189     key_blob.header.reserved = 0;
 190     key_blob.header.aiKeyAlg = CALG_DES;
 191     key_blob.key_size = 8;  // 64 bits
 192     memcpy(key_blob.key_data, key, 8);
 193
 194     crypto::ScopedHCRYPTKEY key;
 195     BOOL import_ok = CryptImportKey(provider,
 196                                     reinterpret_cast<BYTE*>(&key_blob),
 197                                     sizeof key_blob, 0, 0, key.receive());
 198     // Destroy the copy of the key.
 199     SecureZeroMemory(key_blob.key_data, sizeof key_blob.key_data);
 200     if (!import_ok)
 201       return;
 202
 203     // No initialization vector required.
 204     DWORD cipher_mode = CRYPT_MODE_ECB;
 205     if (!CryptSetKeyParam(key, KP_MODE, reinterpret_cast<BYTE*>(&cipher_mode),
 206                           0))
 207       return;
 208
 209     // CryptoAPI requires us to copy the plaintext to the output buffer first.
 210     CopyMemory(hash, src, 8);
 211     // Pass a 'Final' of FALSE, otherwise CryptEncrypt appends one additional
 212     // block of padding to the data.
 213     DWORD hash_len = 8;
 214     CryptEncrypt(key, 0, FALSE, 0, hash, &hash_len, 8);
 215   }
 216 }
 217
 218 #endif
 219
 220 }  // namespace net