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Side by Side Diff: pkg/crypto/lib/src/sha256.dart

Issue 16624003: Remove the crypto factories (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Created 7 years, 6 months ago
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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 SHA256 hasher is used to compute an SHA256 message digest. 7 /**
8 class _SHA256 extends _HashBase implements SHA256 { 8 * SHA256 hash function implementation.
9 */
10 class SHA256 extends _HashBase {
9 // Construct a SHA256 hasher object. 11 // Construct a SHA256 hasher object.
10 _SHA256() : _w = new List(64), super(16, 8, true) { 12 SHA256() : _w = new List(64), super(16, 8, true) {
11 // Initial value of the hash parts. First 32 bits of the fractional parts 13 // Initial value of the hash parts. First 32 bits of the fractional parts
12 // of the square roots of the first 8 prime numbers. 14 // of the square roots of the first 8 prime numbers.
13 _h[0] = 0x6a09e667; 15 _h[0] = 0x6a09e667;
14 _h[1] = 0xbb67ae85; 16 _h[1] = 0xbb67ae85;
15 _h[2] = 0x3c6ef372; 17 _h[2] = 0x3c6ef372;
16 _h[3] = 0xa54ff53a; 18 _h[3] = 0xa54ff53a;
17 _h[4] = 0x510e527f; 19 _h[4] = 0x510e527f;
18 _h[5] = 0x9b05688c; 20 _h[5] = 0x9b05688c;
19 _h[6] = 0x1f83d9ab; 21 _h[6] = 0x1f83d9ab;
20 _h[7] = 0x5be0cd19; 22 _h[7] = 0x5be0cd19;
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96 _h[2] = _add32(c, _h[2]); 98 _h[2] = _add32(c, _h[2]);
97 _h[3] = _add32(d, _h[3]); 99 _h[3] = _add32(d, _h[3]);
98 _h[4] = _add32(e, _h[4]); 100 _h[4] = _add32(e, _h[4]);
99 _h[5] = _add32(f, _h[5]); 101 _h[5] = _add32(f, _h[5]);
100 _h[6] = _add32(g, _h[6]); 102 _h[6] = _add32(g, _h[6]);
101 _h[7] = _add32(h, _h[7]); 103 _h[7] = _add32(h, _h[7]);
102 } 104 }
103 105
104 List<int> _w; 106 List<int> _w;
105 } 107 }
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