More perf. improvements on crypto. _wordToBytes return Uint8List, but addAll is not prepared to run…

pkg/crypto/lib/src/hash_utils.dart

 // 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 crypto;
 
 // Constants.
 const _MASK_8 = 0xff;
 const _MASK_32 = 0xffffffff;
 const _BITS_PER_BYTE = 8;
@@ skipping 85 matching lines @@
       dataIndex += 4;
       var word = (w3 & 0xff) << 24;
       word |= (w2 & _MASK_8) << 16;
       word |= (w1 & _MASK_8) << 8;
       word |= (w0 & _MASK_8);
       _currentChunk[wordIndex] = word;
     }
   }
 
   // Convert a 32-bit word to four bytes.
-  Uint32List _wordToBytes(int word) {
-    Uint32List bytes = new Uint32List(_BYTES_PER_WORD);
+  List<int> _wordToBytes(int word) {
+    List bytes = new List<int>(_BYTES_PER_WORD);
     bytes[0] = (word >> (_bigEndianWords ? 24 : 0)) & _MASK_8;
     bytes[1] = (word >> (_bigEndianWords ? 16 : 8)) & _MASK_8;
     bytes[2] = (word >> (_bigEndianWords ? 8 : 16)) & _MASK_8;
     bytes[3] = (word >> (_bigEndianWords ? 0 : 24)) & _MASK_8;
     return bytes;
   }
 
   // Iterate through data updating the hash computation for each
   // chunk.
   void _iterate() {
@@ skipping 24 matching lines @@
     assert(lengthInBits < pow(2, 32));
     if (_bigEndianWords) {
       _pendingData.addAll(_wordToBytes(0));
       _pendingData.addAll(_wordToBytes(lengthInBits & _MASK_32));
     } else {
       _pendingData.addAll(_wordToBytes(lengthInBits & _MASK_32));
       _pendingData.addAll(_wordToBytes(0));
     }
   }
 }