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1 // Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2015, 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 | 6 |
7 import 'digest.dart'; | 7 import 'digest.dart'; |
8 import 'digest_sink.dart'; | 8 import 'digest_sink.dart'; |
9 | 9 |
10 /// An interface for cryptographic hash functions. | 10 /// An interface for cryptographic hash functions. |
11 /// | 11 /// |
12 /// Every hash is a converter that takes a list of ints and returns a single | 12 /// Every hash is a converter that takes a list of ints and returns a single |
13 /// digest. When used in chunked mode, it will only ever add one digest to the | 13 /// digest. When used in chunked mode, it will only ever add one digest to the |
14 /// inner [Sink]. | 14 /// inner [Sink]. |
15 abstract class Hash | 15 abstract class Hash extends Converter<List<int>, Digest> { |
16 extends ChunkedConverter<List<int>, Digest, List<int>, Digest> { | |
17 /// The internal block size of the hash in bytes. | 16 /// The internal block size of the hash in bytes. |
18 /// | 17 /// |
19 /// This is exposed for use by the [Hmac] class, which needs to know the block | 18 /// This is exposed for use by the [Hmac] class, which needs to know the block |
20 /// size for the [Hash] it uses. | 19 /// size for the [Hash] it uses. |
21 int get blockSize; | 20 int get blockSize; |
22 | 21 |
23 const Hash(); | 22 const Hash(); |
24 | 23 |
25 Digest convert(List<int> data) { | 24 Digest convert(List<int> data) { |
26 var innerSink = new DigestSink(); | 25 var innerSink = new DigestSink(); |
27 var outerSink = startChunkedConversion(innerSink); | 26 var outerSink = startChunkedConversion(innerSink); |
28 outerSink.add(data); | 27 outerSink.add(data); |
29 outerSink.close(); | 28 outerSink.close(); |
30 return innerSink.value; | 29 return innerSink.value; |
31 } | 30 } |
32 | 31 |
33 ByteConversionSink startChunkedConversion(Sink<Digest> sink); | 32 ByteConversionSink startChunkedConversion(Sink<Digest> sink); |
34 } | 33 } |
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