| #!/usr/bin/env python |
| # Copyright 2017 The Fuchsia Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import argparse |
| import hashlib |
| import sys |
| |
| |
| def compute(algorithm, file_name): |
| hasher = hashlib.new(algorithm) |
| with open(file_name, 'rb') as f: |
| for chunk in iter(lambda: f.read(4096), b''): |
| hasher.update(chunk) |
| return hasher.hexdigest() |
| |
| |
| def main(): |
| parser = argparse.ArgumentParser() |
| parser.add_argument( |
| '-a', |
| '--algorithm', |
| default='sha1', |
| choices=['md5', 'sha1', 'sha224', 'sha256', 'sha384', 'sha512']) |
| parser.add_argument('file') |
| |
| args = parser.parse_args() |
| |
| print compute(args.algorithm, args.file) |
| |
| |
| if __name__ == '__main__': |
| sys.exit(main()) |
