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Unified Diff: sdk/lib/crypto/hmac.dart

Issue 15820008: Remove library dart:crypto (Closed) Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart
Patch Set: Addressed review comments Created 7 years, 7 months ago
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Index: sdk/lib/crypto/hmac.dart
diff --git a/sdk/lib/crypto/hmac.dart b/sdk/lib/crypto/hmac.dart
deleted file mode 100644
index 794746d299747d1cbd7e32bb52fe617956c8d308..0000000000000000000000000000000000000000
--- a/sdk/lib/crypto/hmac.dart
+++ /dev/null
@@ -1,84 +0,0 @@
-// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-part of dart.crypto;
-
-class _HMAC implements HMAC {
- bool _isClosed = false;
-
- _HMAC(Hash this._hash, List<int> this._key) : _message = [];
-
- add(List<int> data) {
- if (_isClosed) throw new StateError("HMAC is closed");
- _message.addAll(data);
- }
-
- List<int> get digest {
- var blockSize = _hash.blockSize;
-
- // Hash the key if it is longer than the block size of the hash.
- if (_key.length > blockSize) {
- _hash = _hash.newInstance();
- _hash.add(_key);
- _key = _hash.close();
- }
-
- // Zero-pad the key until its size is equal to the block size of the hash.
- if (_key.length < blockSize) {
- var newKey = new List(blockSize);
- newKey.setRange(0, _key.length, _key);
- for (var i = _key.length; i < blockSize; i++) {
- newKey[i] = 0;
- }
- _key = newKey;
- }
-
- // Compute inner padding.
- var padding = new List(blockSize);
- for (var i = 0; i < blockSize; i++) {
- padding[i] = 0x36 ^ _key[i];
- }
-
- // Inner hash computation.
- _hash = _hash.newInstance();
- _hash.add(padding);
- _hash.add(_message);
- var innerHash = _hash.close();
-
- // Compute outer padding.
- for (var i = 0; i < blockSize; i++) {
- padding[i] = 0x5c ^ _key[i];
- }
-
- // Outer hash computation which is the result.
- _hash = _hash.newInstance();
- _hash.add(padding);
- _hash.add(innerHash);
- return _hash.close();
- }
-
- List<int> close() {
- _isClosed = true;
- return digest;
- }
-
- bool verify(List<int> digest) {
- var computedDigest = this.digest;
- if (digest.length != computedDigest.length) {
- throw new ArgumentError(
- 'Invalid digest size: ${digest.length} in HMAC.verify. '
- 'Expected: ${_hash.blockSize}.');
- }
- int result = 0;
- for (var i = 0; i < digest.length; i++) {
- result |= digest[i] ^ computedDigest[i];
- }
- return result == 0;
- }
-
- // HMAC internal state.
- Hash _hash;
- List<int> _key;
- List<int> _message;
-}
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