Update deprecations.

lib/src/sha1.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.
 
 import 'dart:convert';
 import 'dart:typed_data';
 
 import 'digest.dart';
 import 'hash.dart';
 import 'hash_sink.dart';
 import 'utils.dart';
 
-/// An instance of [SHA1].
+/// An instance of [Sha1].
 ///
-/// This instance provides convenient access to the [SHA1][rfc] hash function.
+/// This instance provides convenient access to the [SHA-1][rfc] hash function.
 ///
 /// [rfc]: http://tools.ietf.org/html/rfc3174
-final sha1 = new SHA1();
+final sha1 = new Sha1._();
 
 /// An implementation of the [SHA-1][rfc] hash function.
 ///
 /// [rfc]: http://tools.ietf.org/html/rfc3174
-///
-/// Note that it's almost always easier to use [sha1] rather than creating a new
-/// instance.
-class SHA1 extends Hash {
+class Sha1 extends Hash {
   final int blockSize = 16 * bytesPerWord;
 
-  @Deprecated("Use the sha1 field instead.")
-  SHA1();
+  Sha1._();
+
+  Sha1 newInstance() => new Sha1._();
+
+  ByteConversionSink startChunkedConversion(Sink<Digest> sink) =>
+      new ByteConversionSink.from(new _Sha1Sink(sink));
+}
+
+/// This class is deprecated.
+///
+/// Use [sha1] instead.
+@Deprecated("Will be removed in crypto 1.0.0.")
+class SHA1 extends Sha1 {
+  SHA1() : super._();
 
   SHA1 newInstance() => new SHA1();
-
-  ByteConversionSink startChunkedConversion(Sink<Digest> sink) =>
-      new ByteConversionSink.from(new _SHA1Sink(sink));
 }
 
-/// The concrete implementation of [SHA1].
+/// The concrete implementation of [Sha1].
 ///
 /// This is separate so that it can extend [HashBase] without leaking additional
 /// public memebers.
-class _SHA1Sink extends HashSink {
+class _Sha1Sink extends HashSink {
   final digest = new Uint32List(5);
 
   /// The sixteen words from the original chunk, extended to 80 words.
   ///
   /// This is an instance variable to avoid re-allocating, but its data isn't
   /// used across invocations of [updateHash].
   final Uint32List _extended;
 
-  _SHA1Sink(Sink<Digest> sink)
+  _Sha1Sink(Sink<Digest> sink)
       : _extended = new Uint32List(80),
         super(sink, 16) {
     digest[0] = 0x67452301;
     digest[1] = 0xEFCDAB89;
     digest[2] = 0x98BADCFE;
     digest[3] = 0x10325476;
     digest[4] = 0xC3D2E1F0;
   }
 
   void updateHash(Uint32List chunk) {
@@ skipping 33 matching lines @@
       a = newA & mask32;
     }
 
     digest[0] = add32(a, digest[0]);
     digest[1] = add32(b, digest[1]);
     digest[2] = add32(c, digest[2]);
     digest[3] = add32(d, digest[3]);
     digest[4] = add32(e, digest[4]);
   }
 }