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https://github.com/ddnet/ddnet.git
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86 lines
3.1 KiB
Python
86 lines
3.1 KiB
Python
import argparse
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import tempfile
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import binascii
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import hashlib
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import os
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import re
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import sys
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AUTH_ADD_REGEX=re.compile(r'^\s*auth_add\s+(?P<username>"[^"]*"|[^"\s]+)\s+(?P<level>"[^"]*"|[^"\s]+)\s+(?P<password>"[^"]*"|[^"\s]+)\s*$')
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AUTH_ADD_PRESENT_REGEX=re.compile(r'(^|\W)auth_add($|\W)')
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def hash_password(password):
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salt = os.urandom(8)
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h = hashlib.md5()
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h.update(password.encode())
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h.update(salt)
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return h.hexdigest(), binascii.hexlify(salt).decode('ascii')
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def auth_add_p_line(username, level, pwhash, salt):
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if level not in ('admin', 'mod', 'moderator', 'helper'):
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print(f"Warning: level ({level}) not one of admin, mod or helper.", file=sys.stderr)
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if repr(level) != f"'{level}'":
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print(f"Warning: level ({level}) contains weird symbols, config line is possibly malformed.", file=sys.stderr)
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if repr(username) != f"'{username}'":
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print(f"Warning: username ({username}) contains weird symbols, config line is possibly malformed.", file=sys.stderr)
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username = username.replace('"', '\\"')
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if ' ' in username or ';' in username:
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username = f'"{username}"'
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return f"auth_add_p {username} {level} {pwhash} {salt}"
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def auth_add_p_line_from_pw(username, level, password):
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if len(password) < 8:
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print("Warning: password too short for a long-term password.", file=sys.stderr)
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pwhash, salt = hash_password(password)
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return auth_add_p_line(username, level, pwhash, salt)
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def parse_line(line):
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m = AUTH_ADD_REGEX.match(line)
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if not m:
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if AUTH_ADD_PRESENT_REGEX.search(line):
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print("Warning: Funny-looking line with 'auth_add', not touching it:")
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print(line, end="")
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return None
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password = m.group('password')
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if password.startswith('"'):
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password = password[1:-1] # Strip quotes.
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return m.group('username'), m.group('level'), password
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def main():
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p = argparse.ArgumentParser(description="Hash passwords in a way suitable for DDNet configs.")
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p.add_argument('--new', '-n', nargs=3, metavar=("USERNAME", "LEVEL", "PASSWORD"), action='append', default=[], help="username, level and password of the new user")
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p.add_argument('config', nargs='?', metavar="CONFIG", help="config file to update.")
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args = p.parse_args()
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if not args.new and args.config is None:
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p.error("expected at least one of --new and CONFIG")
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use_stdio = args.config is None or args.config == '-'
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if use_stdio:
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if args.config is None:
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input_file = open(os.devnull, encoding="utf-8")
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else:
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input_file = sys.stdin
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output_file = sys.stdout
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else:
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input_file = open(args.config, encoding="utf-8") # pylint: disable=consider-using-with
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output_file = tempfile.NamedTemporaryFile('w', dir=os.getcwd(), prefix=f"{args.config}.", delete=False) # pylint: disable=consider-using-with
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for line in input_file:
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parsed = parse_line(line)
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if parsed is None:
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print(line, end="", file=output_file)
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else:
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print(auth_add_p_line_from_pw(*parsed), file=output_file)
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for auth_tuple in args.new:
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print(auth_add_p_line_from_pw(*auth_tuple), file=output_file)
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if not use_stdio:
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input_file.close()
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output_filename = output_file.name
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output_file.close()
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os.rename(output_filename, args.config)
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if __name__ == '__main__':
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main()
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