From 4a33103c40ed273ac5cda7fe93252872e32fdb2d Mon Sep 17 00:00:00 2001 From: PlexSheep Date: Tue, 25 Apr 2023 19:57:10 +0200 Subject: [PATCH] extension attack structure --- plexcryptool/authur1.py | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/plexcryptool/authur1.py b/plexcryptool/authur1.py index 5af5f62..929d16d 100755 --- a/plexcryptool/authur1.py +++ b/plexcryptool/authur1.py @@ -134,6 +134,8 @@ def main(): help='perform tests') parser.add_argument('-v', '--verbose', action="store_true", help='print many things') + parser.add_argument('-e', '--extension-attack', type=str, + help='perform an extension attack, this option requires known mics in the form: "deadbeed,abababab,ecbadf,..."') parser.add_argument('-a', '--auth', action="store_true", help='generate a message integrity code (mic), needs a value to be hashed. If no key is specified, a random key will be generated.') args = parser.parse_args() @@ -149,7 +151,7 @@ def main(): key.extend(random.randbytes(16 - len(key))) elif len(key) > 16: print("Your key is too long!") - exit() + exit(1) else: key: bytearray = bytearray(random.randbytes(16)) my_bytes: bytearray = bytearray(str.encode(args.hash)) @@ -162,6 +164,24 @@ def main(): my_bytes: bytearray = bytearray(str.encode(args.hash)) hashed: bytearray = authur1(my_bytes, args.verbose) print("hash for \"%s\" is:\n%s" % (args.hash, hashed.hex())) + exit() + elif args.extension_attack: + # TODO + hex_strs: list = args.extension_attack.split(",") + mics: list = [] # will store our processed given hashes + for mic in hex_strs: + try: + assert (len(mic) == 8), "given hash '%s' formatted incorrectly" % mic + mic_int: int = int(mic, 16) + mics.append(bytearray(mic_int.to_bytes(4))) + except Exception: + print("given hash '%s' formatted incorrectly" % mic) + exit(1) + + # now attack authur1 with the given mics + # TODO extension attack + print("extension attack is still TODO") + exit() parser.print_help()