Implement a Base64 codec

lib/crypto.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+

[Lasse Reichstein Nielsen, 2015/05/29 14:15:41]

Extra line doesn't belong here. 

[Alexander Ivanov, 2015/06/03 09:14:57]

Done.

 // 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.
 
 /**
  * Cryptographic algorithms, with support for hash functions such as
  * SHA-1, SHA-256, HMAC, and MD5.
  */
 library crypto;
 
 import 'dart:math';
 import 'dart:typed_data';
+import 'dart:convert';
 
 part 'src/crypto_utils.dart';
 part 'src/hash_utils.dart';
 part 'src/hmac.dart';
 part 'src/md5.dart';
 part 'src/sha1.dart';
 part 'src/sha256.dart';
+part 'src/base64.dart';
 
 /**
  * Interface for cryptographic hash functions.
  *
  * The [add] method is used to add data to the hash. The [close] method
  * is used to extract the message digest.
  *
  * Once the [close] method has been called no more data can be added using the
  * [add] method. If [add] is called after the first call to [close] a
  * HashException is thrown.
@@ skipping 71 matching lines @@
    * Accepts both URL safe and unsafe Base 64 encoded strings.
    *
    * Throws a FormatException exception if input contains invalid characters.
    *
    * Based on [RFC 4648](http://tools.ietf.org/html/rfc4648)
    */
   static List<int> base64StringToBytes(String input) {
     return _CryptoUtils.base64StringToBytes(input);
   }
 }