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).
66static 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
77namespace net {
78
79void 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
92void DESEncrypt(const uint8* key, const uint8* src, uint8* hash) {
93  crypto::EnsureOpenSSLInit();
94
95  DES_key_schedule ks;
96  DES_set_key(
97      reinterpret_cast<const DES_cblock*>(key), &ks);
98
99  DES_ecb_encrypt(reinterpret_cast<const DES_cblock*>(src),
100                  reinterpret_cast<DES_cblock*>(hash), &ks, DES_ENCRYPT);
101}
102
103#elif defined(USE_NSS)
104
105void 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
162void 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
173void 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
221