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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 library dart.crypto; | 5 library crypto; |
6 | 6 |
7 import 'dart:math'; | 7 import 'dart:math'; |
8 | 8 |
9 part 'src/crypto_utils.dart'; | 9 part 'src/crypto_utils.dart'; |
10 part 'src/hash_utils.dart'; | 10 part 'src/hash_utils.dart'; |
11 part 'src/hmac.dart'; | 11 part 'src/hmac.dart'; |
12 part 'src/md5.dart'; | 12 part 'src/md5.dart'; |
13 part 'src/sha1.dart'; | 13 part 'src/sha1.dart'; |
14 part 'src/sha256.dart'; | 14 part 'src/sha256.dart'; |
15 | 15 |
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49 * | 49 * |
50 * This is exposed for use by the HMAC class which needs to know the | 50 * This is exposed for use by the HMAC class which needs to know the |
51 * block size for the [Hash] it is using. | 51 * block size for the [Hash] it is using. |
52 */ | 52 */ |
53 int get blockSize; | 53 int get blockSize; |
54 } | 54 } |
55 | 55 |
56 /** | 56 /** |
57 * SHA1 hash function implementation. | 57 * SHA1 hash function implementation. |
58 */ | 58 */ |
59 abstract class SHA1 implements Hash { | 59 class SHA1 implements Hash { |
60 factory SHA1() => new _SHA1(); | 60 factory SHA1() => new _SHA1(); |
61 } | 61 } |
62 | 62 |
63 /** | 63 /** |
64 * SHA256 hash function implementation. | 64 * SHA256 hash function implementation. |
65 */ | 65 */ |
66 abstract class SHA256 implements Hash { | 66 class SHA256 implements Hash { |
67 factory SHA256() => new _SHA256(); | 67 factory SHA256() => new _SHA256(); |
68 } | 68 } |
69 | 69 |
70 /** | 70 /** |
71 * MD5 hash function implementation. | 71 * MD5 hash function implementation. |
72 * | 72 * |
73 * WARNING: MD5 has known collisions and should only be used when | 73 * WARNING: MD5 has known collisions and should only be used when |
74 * required for backwards compatibility. | 74 * required for backwards compatibility. |
75 */ | 75 */ |
76 abstract class MD5 implements Hash { | 76 class MD5 implements Hash { |
77 factory MD5() => new _MD5(); | 77 factory MD5() => new _MD5(); |
78 } | 78 } |
79 | 79 |
80 /** | 80 /** |
81 * Hash-based Message Authentication Code support. | 81 * Hash-based Message Authentication Code support. |
82 * | 82 * |
83 * The [add] method is used to add data to the message. The [digest] and | 83 * The [add] method is used to add data to the message. The [digest] and |
84 * [close] methods are used to extract the message authentication code. | 84 * [close] methods are used to extract the message authentication code. |
85 */ | 85 */ |
86 // TODO(floitsch): make Hash implement Sink, EventSink or similar. | 86 // TODO(floitsch): make Hash implement Sink, EventSink or similar. |
87 abstract class HMAC { | 87 class HMAC { |
88 /** | 88 /** |
89 * Create an [HMAC] object from a [Hash] and a key. | 89 * Create an [HMAC] object from a [Hash] and a key. |
90 */ | 90 */ |
91 factory HMAC(Hash hash, List<int> key) => new _HMAC(hash, key); | 91 factory HMAC(Hash hash, List<int> key) => new _HMAC(hash, key); |
92 | 92 |
93 /** | 93 /** |
94 * Add a list of bytes to the message. | 94 * Add a list of bytes to the message. |
95 */ | 95 */ |
96 add(List<int> data); | 96 add(List<int> data); |
97 | 97 |
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115 * | 115 * |
116 * Throws an exception if the given digest does not have the same | 116 * Throws an exception if the given digest does not have the same |
117 * size as the digest computed by this HMAC instance. | 117 * size as the digest computed by this HMAC instance. |
118 */ | 118 */ |
119 bool verify(List<int> digest); | 119 bool verify(List<int> digest); |
120 } | 120 } |
121 | 121 |
122 /** | 122 /** |
123 * Utility methods for working with message digests. | 123 * Utility methods for working with message digests. |
124 */ | 124 */ |
125 abstract class CryptoUtils { | 125 class CryptoUtils { |
126 /** | 126 /** |
127 * Convert a list of bytes (for example a message digest) into a hex | 127 * Convert a list of bytes (for example a message digest) into a hex |
128 * string. | 128 * string. |
129 */ | 129 */ |
130 static String bytesToHex(List<int> bytes) { | 130 static String bytesToHex(List<int> bytes) { |
131 return _CryptoUtils.bytesToHex(bytes); | 131 return _CryptoUtils.bytesToHex(bytes); |
132 } | 132 } |
133 | 133 |
134 /** | 134 /** |
135 * Converts a list of bytes into a Base 64 encoded string. | 135 * Converts a list of bytes into a Base 64 encoded string. |
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162 * | 162 * |
163 * Accepts both URL safe and unsafe Base 64 encoded strings. | 163 * Accepts both URL safe and unsafe Base 64 encoded strings. |
164 * | 164 * |
165 * Based on [RFC 4648](http://tools.ietf.org/html/rfc4648) | 165 * Based on [RFC 4648](http://tools.ietf.org/html/rfc4648) |
166 */ | 166 */ |
167 static List<int> base64StringToBytes(String input, | 167 static List<int> base64StringToBytes(String input, |
168 {bool ignoreInvalidCharacters : true}) { | 168 {bool ignoreInvalidCharacters : true}) { |
169 return _CryptoUtils.base64StringToBytes(input, ignoreInvalidCharacters); | 169 return _CryptoUtils.base64StringToBytes(input, ignoreInvalidCharacters); |
170 } | 170 } |
171 } | 171 } |
172 | |
173 /** | |
174 * HashExceptions are thrown on invalid use of a Hash | |
175 * object. | |
176 */ | |
177 class HashException { | |
178 HashException(String this.message); | |
179 toString() => "HashException: $message"; | |
180 String message; | |
181 } | |
182 | |
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