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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 crypto; | 5 part of crypto; |
6 | 6 |
7 // The SHA1 hasher is used to compute an SHA1 message digest. | 7 /** |
8 class _SHA1 extends _HashBase implements SHA1 { | 8 * SHA1 hash function implementation. |
| 9 */ |
| 10 class SHA1 extends _HashBase { |
9 // Construct a SHA1 hasher object. | 11 // Construct a SHA1 hasher object. |
10 _SHA1() : _w = new List(80), super(16, 5, true) { | 12 SHA1() : _w = new List(80), super(16, 5, true) { |
11 _h[0] = 0x67452301; | 13 _h[0] = 0x67452301; |
12 _h[1] = 0xEFCDAB89; | 14 _h[1] = 0xEFCDAB89; |
13 _h[2] = 0x98BADCFE; | 15 _h[2] = 0x98BADCFE; |
14 _h[3] = 0x10325476; | 16 _h[3] = 0x10325476; |
15 _h[4] = 0xC3D2E1F0; | 17 _h[4] = 0xC3D2E1F0; |
16 } | 18 } |
17 | 19 |
18 // Returns a new instance of this Hash. | 20 // Returns a new instance of this Hash. |
19 SHA1 newInstance() { | 21 SHA1 newInstance() { |
20 return new SHA1(); | 22 return new SHA1(); |
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58 | 60 |
59 _h[0] = _add32(a, _h[0]); | 61 _h[0] = _add32(a, _h[0]); |
60 _h[1] = _add32(b, _h[1]); | 62 _h[1] = _add32(b, _h[1]); |
61 _h[2] = _add32(c, _h[2]); | 63 _h[2] = _add32(c, _h[2]); |
62 _h[3] = _add32(d, _h[3]); | 64 _h[3] = _add32(d, _h[3]); |
63 _h[4] = _add32(e, _h[4]); | 65 _h[4] = _add32(e, _h[4]); |
64 } | 66 } |
65 | 67 |
66 List<int> _w; | 68 List<int> _w; |
67 } | 69 } |
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