Convert crypto libraries to use Uint32Lists.

pkg/crypto/lib/src/hash_utils.dart

Index: pkg/crypto/lib/src/hash_utils.dart
===================================================================
--- pkg/crypto/lib/src/hash_utils.dart	(revision 43158)
+++ pkg/crypto/lib/src/hash_utils.dart	(working copy)
@@ -25,8 +25,8 @@
   final int _chunkSizeInWords;
   final int _digestSizeInWords;
   final bool _bigEndianWords;
-  final List<int> _currentChunk;
-  final List<int> _h;
+  final Uint32List _currentChunk;
+  final Uint32List _h;
   int _lengthInBytes = 0;
   List<int> _pendingData;
   bool _digestCalled = false;
@@ -35,8 +35,8 @@
             int digestSizeInWords,
             bool this._bigEndianWords)
       : _pendingData = [],
-        _currentChunk = new List(chunkSizeInWords),
-        _h = new List(digestSizeInWords),
+        _currentChunk = new Uint32List(chunkSizeInWords),
+        _h = new Uint32List(digestSizeInWords),
         _chunkSizeInWords = chunkSizeInWords,
         _digestSizeInWords = digestSizeInWords;
 
@@ -69,7 +69,7 @@
   }
 
   // One round of the hash computation.
-  void _updateHash(List<int> m);
+  void _updateHash(Uint32List m);
 
   // Helper methods.
   int _add32(x, y) => (x + y) & _MASK_32;
@@ -103,8 +103,8 @@
   }
 
   // Convert a 32-bit word to four bytes.
-  List<int> _wordToBytes(int word) {
-    List<int> bytes = new List(_BYTES_PER_WORD);
+  Uint32List _wordToBytes(int word) {
+    Uint32List bytes = new Uint32List(_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;