def __init__(self, data=None): state = VoidPointer() result = _raw_keccak_lib.keccak_init(state.address_of(), c_size_t(64), 0x1F) if result: raise ValueError("Error %d while instantiating SHAKE256" % result) self._state = SmartPointer(state.get(), _raw_keccak_lib.keccak_destroy) self._is_squeezing = False if data: self.update(data)
def __init__(self, data=None): state = VoidPointer() result = _raw_keccak_lib.keccak_init(state.address_of(), c_size_t(32), 0x1F) if result: raise ValueError("Error %d while instantiating SHAKE128" % result) self._state = SmartPointer(state.get(), _raw_keccak_lib.keccak_destroy) self._is_squeezing = False if data: self.update(data)
def __init__(self, data, update_after_digest): self._update_after_digest = update_after_digest self._digest_done = False state = VoidPointer() result = _raw_keccak_lib.keccak_init(state.address_of(), c_size_t(self.digest_size * 2), 0x06) if result: raise ValueError("Error %d while instantiating SHA-3/384" % result) self._state = SmartPointer(state.get(), _raw_keccak_lib.keccak_destroy) if data: self.update(data)
def __init__(self, data, custom, capacity, function): state = VoidPointer() if custom or function: prefix_unpad = _encode_str(function) + _encode_str(custom) prefix = _bytepad(prefix_unpad, (1600 - capacity) // 8) self._padding = 0x04 else: prefix = None self._padding = 0x1F # for SHAKE result = _raw_keccak_lib.keccak_init(state.address_of(), c_size_t(capacity // 8), c_ubyte(24)) if result: raise ValueError("Error %d while instantiating cSHAKE" % result) self._state = SmartPointer(state.get(), _raw_keccak_lib.keccak_destroy) self._is_squeezing = False if prefix: self.update(prefix) if data: self.update(data)