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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 import 'dart:convert'; | 5 import 'dart:convert'; |
6 import 'dart:typed_data'; | 6 import 'dart:typed_data'; |
7 | 7 |
8 import 'digest.dart'; | 8 import 'digest.dart'; |
9 import 'hash.dart'; | 9 import 'hash.dart'; |
10 import 'hash_sink.dart'; | 10 import 'hash_sink.dart'; |
11 import 'utils.dart'; | 11 import 'utils.dart'; |
12 | 12 |
13 /// An instance of [MD5]. | 13 /// An instance of [MD5]. |
14 /// | 14 /// |
15 /// This instance provides convenient access to the [MD5][rfc] hash function. | 15 /// This instance provides convenient access to the [MD5][rfc] hash function. |
16 /// | 16 /// |
17 /// [rfc]: https://tools.ietf.org/html/rfc1321 | 17 /// [rfc]: https://tools.ietf.org/html/rfc1321 |
18 /// | 18 /// |
19 /// **Warning**: MD5 has known collisions and should only be used when required | 19 /// **Warning**: MD5 has known collisions and should only be used when required |
20 /// for backwards compatibility. | 20 /// for backwards compatibility. |
21 final md5 = new MD5(); | 21 final md5 = new MD5._(); |
22 | 22 |
23 /// An implementation of the [MD5][rfc] hash function. | 23 /// An implementation of the [MD5][rfc] hash function. |
24 /// | 24 /// |
25 /// [rfc]: https://tools.ietf.org/html/rfc1321 | 25 /// [rfc]: https://tools.ietf.org/html/rfc1321 |
26 /// | 26 /// |
27 /// **Warning**: MD5 has known collisions and should only be used when required | 27 /// **Warning**: MD5 has known collisions and should only be used when required |
28 /// for backwards compatibility. | 28 /// for backwards compatibility. |
29 /// | 29 /// |
30 /// Note that it's almost always easier to use [md5] rather than creating a new | 30 /// Note that it's almost always easier to use [md5] rather than creating a new |
31 /// instance. | 31 /// instance. |
32 class MD5 extends Hash { | 32 class MD5 extends Hash { |
33 final int blockSize = 16 * bytesPerWord; | 33 final int blockSize = 16 * bytesPerWord; |
34 | 34 |
35 /// This constructor is deprecated. | 35 MD5._(); |
36 /// | |
37 /// Use [md5] instead. | |
38 @Deprecated("Will be removed in crypto 1.0.0.") | |
39 MD5(); | |
40 | |
41 MD5 newInstance() => new MD5(); | |
42 | 36 |
43 ByteConversionSink startChunkedConversion(Sink<Digest> sink) => | 37 ByteConversionSink startChunkedConversion(Sink<Digest> sink) => |
44 new ByteConversionSink.from(new _MD5Sink(sink)); | 38 new ByteConversionSink.from(new _MD5Sink(sink)); |
45 } | 39 } |
46 | 40 |
47 /// Data from a non-linear mathematical function that functions as | 41 /// Data from a non-linear mathematical function that functions as |
48 /// reproducible noise. | 42 /// reproducible noise. |
49 const _noise = const [ | 43 const _noise = const [ |
50 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a, | 44 0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee, 0xf57c0faf, 0x4787c62a, |
51 0xa8304613, 0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, | 45 0xa8304613, 0xfd469501, 0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be, |
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121 _shiftAmounts[i])); | 115 _shiftAmounts[i])); |
122 a = temp; | 116 a = temp; |
123 } | 117 } |
124 | 118 |
125 digest[0] = add32(a, digest[0]); | 119 digest[0] = add32(a, digest[0]); |
126 digest[1] = add32(b, digest[1]); | 120 digest[1] = add32(b, digest[1]); |
127 digest[2] = add32(c, digest[2]); | 121 digest[2] = add32(c, digest[2]); |
128 digest[3] = add32(d, digest[3]); | 122 digest[3] = add32(d, digest[3]); |
129 } | 123 } |
130 } | 124 } |
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