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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 library crypto.hmac; |
| 6 |
| 7 import 'hash.dart'; |
| 6 | 8 |
| 7 /** | 9 /** |
| 8 * Hash-based Message Authentication Code support. | 10 * Hash-based Message Authentication Code support. |
| 9 * | 11 * |
| 10 * The [add] method is used to add data to the message. The [digest] and | 12 * The [add] method is used to add data to the message. The [digest] and |
| 11 * [close] methods are used to extract the message authentication code. | 13 * [close] methods are used to extract the message authentication code. |
| 12 */ | 14 */ |
| 13 // TODO(floitsch): make Hash implement Sink, EventSink or similar. | 15 // TODO(floitsch): make Hash implement Sink, EventSink or similar. |
| 14 class HMAC { | 16 class HMAC { |
| 15 final List<int> _message; | 17 final List<int> _message; |
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| 103 'Invalid digest size: ${digest.length} in HMAC.verify. ' | 105 'Invalid digest size: ${digest.length} in HMAC.verify. ' |
| 104 'Expected: ${_hash.blockSize}.'); | 106 'Expected: ${_hash.blockSize}.'); |
| 105 } | 107 } |
| 106 int result = 0; | 108 int result = 0; |
| 107 for (var i = 0; i < digest.length; i++) { | 109 for (var i = 0; i < digest.length; i++) { |
| 108 result |= digest[i] ^ computedDigest[i]; | 110 result |= digest[i] ^ computedDigest[i]; |
| 109 } | 111 } |
| 110 return result == 0; | 112 return result == 0; |
| 111 } | 113 } |
| 112 } | 114 } |
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