| // Copyright (c) 2015, 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:async'; |
| import 'dart:io'; |
| |
| import 'package:crypto/crypto.dart'; |
| |
| final _usage = 'Usage: dart hash.dart <md5|sha1|sha256> <input_filename>'; |
| |
| Future main(List<String> args) async { |
| if (args == null || args.length != 2) { |
| print(_usage); |
| exit(1); |
| } |
| |
| Hash hasher; |
| |
| switch (args[0]) { |
| case 'md5': |
| hasher = md5; |
| break; |
| case 'sha1': |
| hasher = sha1; |
| break; |
| case 'sha256': |
| hasher = sha256; |
| break; |
| default: |
| print(_usage); |
| exit(1); |
| } |
| |
| var filename = args[1]; |
| var input = new File(filename); |
| |
| if (!input.existsSync()) { |
| print('File "$filename" does not exist.'); |
| exit(1); |
| } |
| |
| var value = await hasher.bind(input.openRead()).first; |
| |
| print(value); |
| } |