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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of dart.crypto; | 5 part of crypto; |
6 | 6 |
7 // Constants. | 7 // Constants. |
8 const _MASK_8 = 0xff; | 8 const _MASK_8 = 0xff; |
9 const _MASK_32 = 0xffffffff; | 9 const _MASK_32 = 0xffffffff; |
10 const _BITS_PER_BYTE = 8; | 10 const _BITS_PER_BYTE = 8; |
11 const _BYTES_PER_WORD = 4; | 11 const _BYTES_PER_WORD = 4; |
12 | 12 |
13 // Helper functions used by more than one hasher. | 13 // Helper functions used by more than one hasher. |
14 | 14 |
15 // Rotate left limiting to unsigned 32-bit values. | 15 // Rotate left limiting to unsigned 32-bit values. |
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26 int this._digestSizeInWords, | 26 int this._digestSizeInWords, |
27 bool this._bigEndianWords) | 27 bool this._bigEndianWords) |
28 : _pendingData = [] { | 28 : _pendingData = [] { |
29 _currentChunk = new List(_chunkSizeInWords); | 29 _currentChunk = new List(_chunkSizeInWords); |
30 _h = new List(_digestSizeInWords); | 30 _h = new List(_digestSizeInWords); |
31 } | 31 } |
32 | 32 |
33 // Update the hasher with more data. | 33 // Update the hasher with more data. |
34 add(List<int> data) { | 34 add(List<int> data) { |
35 if (_digestCalled) { | 35 if (_digestCalled) { |
36 throw new HashException( | 36 throw new StateError( |
37 'Hash update method called after digest was retrieved'); | 37 'Hash update method called after digest was retrieved'); |
38 } | 38 } |
39 _lengthInBytes += data.length; | 39 _lengthInBytes += data.length; |
40 _pendingData.addAll(data); | 40 _pendingData.addAll(data); |
41 _iterate(); | 41 _iterate(); |
42 } | 42 } |
43 | 43 |
44 // Finish the hash computation and return the digest string. | 44 // Finish the hash computation and return the digest string. |
45 List<int> close() { | 45 List<int> close() { |
46 if (_digestCalled) { | 46 if (_digestCalled) { |
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145 // Hasher state. | 145 // Hasher state. |
146 final int _chunkSizeInWords; | 146 final int _chunkSizeInWords; |
147 final int _digestSizeInWords; | 147 final int _digestSizeInWords; |
148 final bool _bigEndianWords; | 148 final bool _bigEndianWords; |
149 int _lengthInBytes = 0; | 149 int _lengthInBytes = 0; |
150 List<int> _pendingData; | 150 List<int> _pendingData; |
151 List<int> _currentChunk; | 151 List<int> _currentChunk; |
152 List<int> _h; | 152 List<int> _h; |
153 bool _digestCalled = false; | 153 bool _digestCalled = false; |
154 } | 154 } |
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