bindiff: Binary file diff

bindiff.py

#!/usr/bin/env python
"""
Binary file diff
Usage:
    bindiff <FILE> <FILE>
Install:
    curl -L https://gist.githubusercontent.com/guyskk/98621a9785bd88cf2b4e804978950122/raw/efc200c6e45c3ef503249cf3b151fb8a1f5b75cb/bindiff.py -o bindiff && chmod +x bindiff
"""
import io
import sys


def _to_hex(value):
    if sys.version_info[0] <= 2:
        return ''.join('{:02x}'.format(ord(x)) for x in value).upper()
    else:
        return value.hex().upper()


def main():
    try:
        f1 = io.open(sys.argv[1], 'rb')
        f2 = io.open(sys.argv[2], 'rb')
    except IndexError:
        print(__doc__.strip())
        sys.exit(1)
    except IOError as ex:
        print(ex)
        sys.exit(1)
    chunk_size = 40
    offset = 0
    max_diff = 100
    num_diff = 0
    try:
        while True:
            d1 = f1.read(chunk_size)
            d2 = f2.read(chunk_size)
            if d1 != d2:
                hex1 = _to_hex(d1)
                hex2 = _to_hex(d2)
                diff = ''.join(x == y and ' ' or '^' for x, y in zip(hex1, hex2))
                pad = ' ' * (len(str(offset)) + 2)
                print('{}> {}\n{}{}\n{}{}'.format(offset, hex1, pad, diff, pad, hex2))
                num_diff += 1
                if num_diff >= max_diff:
                    print('Too many differences, skip...')
                    break
            if d1 == b'' or d2 == b'':
                break
            offset += chunk_size
    finally:
        f1.close()
        f2.close()


if __name__ == "__main__":
    main()