Python _bcrypt_kdf Examples

Example #1

def _init_cipher(ciphername, password, salt, rounds, backend):
    """Generate key + iv and return cipher."""
    if not password:
        raise ValueError("Key is password-protected.")

    algo, key_len, mode, iv_len = _SSH_CIPHERS[ciphername]
    seed = _bcrypt_kdf(password, salt, key_len + iv_len, rounds, True)
    return Cipher(algo(seed[:key_len]), mode(seed[key_len:]), backend)

Example #2

File: ssh.py Project: Sp1l/py-cryptography

def _init_cipher(
    ciphername: bytes,
    password: typing.Optional[bytes],
    salt: bytes,
    rounds: int,
) -> Cipher[typing.Union[modes.CBC, modes.CTR]]:
    """Generate key + iv and return cipher."""
    if not password:
        raise ValueError("Key is password-protected.")

    algo, key_len, mode, iv_len = _SSH_CIPHERS[ciphername]
    seed = _bcrypt_kdf(password, salt, key_len + iv_len, rounds, True)
    return Cipher(algo(seed[:key_len]), mode(seed[key_len:]))