Function ARC4_encrypt

scapy/modules/krack/crypto.py:20–29

Encrypt data @data with key @key, skipping @skip first bytes of the keystream

(key, data, skip=0)

def ARC4_encrypt(key, data, skip=0):
    """Encrypt data @data with key @key, skipping @skip first bytes of the
    keystream"""

    algorithm = algorithms.ARC4(key)
    cipher = Cipher(algorithm, mode=None, backend=default_backend())
    encryptor = cipher.encryptor()
    if skip:
        encryptor.update(b"\x00" * skip)
    return encryptor.update(data)


def ARC4_decrypt(key, data, skip=0):