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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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