extension attack structure

This commit is contained in:
Christoph J. Scherr 2023-04-25 19:57:10 +02:00
parent b21c16b948
commit 4a33103c40
Signed by: PlexSheep
GPG Key ID: 25B4ACF7D88186CC
1 changed files with 21 additions and 1 deletions

View File

@ -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()