50 lines
1.1 KiB
Dart
50 lines
1.1 KiB
Dart
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// Copyright (c) 2015, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:async';
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import 'dart:io';
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import 'package:crypto/crypto.dart';
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final _usage = 'Usage: dart hash.dart <md5|sha1|sha256> <input_filename>';
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Future<void> main(List<String> args) async {
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if (args.length != 2) {
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print(_usage);
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exitCode = 64; // Command was used incorrectly.
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return;
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}
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Hash hasher;
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switch (args[0]) {
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case 'md5':
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hasher = md5;
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break;
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case 'sha1':
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hasher = sha1;
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break;
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case 'sha256':
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hasher = sha256;
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break;
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default:
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print(_usage);
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exitCode = 64; // Command was used incorrectly.
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return;
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}
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var filename = args[1];
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var input = File(filename);
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if (!input.existsSync()) {
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print('File "$filename" does not exist.');
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exitCode = 66; // An input file did not exist or was not readable.
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return;
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}
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var value = await hasher.bind(input.openRead()).first;
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print(value);
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}
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