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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "crypto/symmetric_key.h" | 5 #include "crypto/symmetric_key.h" |
6 | 6 |
7 #include <winsock2.h> // For htonl. | |
8 | |
9 #include <vector> | 7 #include <vector> |
10 | 8 |
11 // TODO(wtc): replace scoped_array by std::vector. | 9 // TODO(wtc): replace scoped_array by std::vector. |
12 #include "base/memory/scoped_ptr.h" | 10 #include "base/memory/scoped_ptr.h" |
| 11 #include "base/sys_byteorder.h" |
13 | 12 |
14 namespace crypto { | 13 namespace crypto { |
15 | 14 |
16 namespace { | 15 namespace { |
17 | 16 |
18 // The following is a non-public Microsoft header documented in MSDN under | 17 // The following is a non-public Microsoft header documented in MSDN under |
19 // CryptImportKey / CryptExportKey. Following the header is the byte array of | 18 // CryptImportKey / CryptExportKey. Following the header is the byte array of |
20 // the actual plaintext key. | 19 // the actual plaintext key. |
21 struct PlaintextBlobHeader { | 20 struct PlaintextBlobHeader { |
22 BLOBHEADER hdr; | 21 BLOBHEADER hdr; |
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257 if (!ok) | 256 if (!ok) |
258 return false; | 257 return false; |
259 | 258 |
260 // Iteration U_1: Compute PRF for S. | 259 // Iteration U_1: Compute PRF for S. |
261 ok = CryptHashData(safe_hash, reinterpret_cast<const BYTE*>(salt.data()), | 260 ok = CryptHashData(safe_hash, reinterpret_cast<const BYTE*>(salt.data()), |
262 static_cast<DWORD>(salt.size()), 0); | 261 static_cast<DWORD>(salt.size()), 0); |
263 if (!ok) | 262 if (!ok) |
264 return false; | 263 return false; |
265 | 264 |
266 // Iteration U_1: and append (big-endian) INT (i). | 265 // Iteration U_1: and append (big-endian) INT (i). |
267 uint32 big_endian_block_index = htonl(block_index); | 266 uint32 big_endian_block_index = base::HostToNet32(block_index); |
268 ok = CryptHashData(safe_hash, | 267 ok = CryptHashData(safe_hash, |
269 reinterpret_cast<BYTE*>(&big_endian_block_index), | 268 reinterpret_cast<BYTE*>(&big_endian_block_index), |
270 sizeof(big_endian_block_index), 0); | 269 sizeof(big_endian_block_index), 0); |
271 | 270 |
272 std::vector<BYTE> hash_value(hash_size); | 271 std::vector<BYTE> hash_value(hash_size); |
273 | 272 |
274 DWORD size = hash_size; | 273 DWORD size = hash_size; |
275 ok = CryptGetHashParam(safe_hash, HP_HASHVAL, &hash_value[0], &size, 0); | 274 ok = CryptGetHashParam(safe_hash, HP_HASHVAL, &hash_value[0], &size, 0); |
276 if (!ok || size != hash_size) | 275 if (!ok || size != hash_size) |
277 return false; | 276 return false; |
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528 HCRYPTKEY key, | 527 HCRYPTKEY key, |
529 const void* key_data, size_t key_size_in_bytes) | 528 const void* key_data, size_t key_size_in_bytes) |
530 : provider_(provider), key_(key) { | 529 : provider_(provider), key_(key) { |
531 if (key_data) { | 530 if (key_data) { |
532 raw_key_.assign(reinterpret_cast<const char*>(key_data), | 531 raw_key_.assign(reinterpret_cast<const char*>(key_data), |
533 key_size_in_bytes); | 532 key_size_in_bytes); |
534 } | 533 } |
535 } | 534 } |
536 | 535 |
537 } // namespace crypto | 536 } // namespace crypto |
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