def set_key(self, key):
'''
Will set the crypting key for this object. Either 16 or 24 bytes long.
'''
self.key_size = 24 # Use DES-EDE3 mode
if len(key) != self.key_size:
if len(key) == 16: # Use DES-EDE2 mode
self.key_size = 16
else:
raise ValueError('Key must be either 16 or 24 bytes long.')
if self.get_mode() == CBC:
if not self.get_iv():
# Use the first 8 bytes of the key
self._iv = key[:self.block_size]
if len(self.get_iv()) != self.block_size:
raise ValueError('Invalid IV, must be 8 bytes in length')
self.__key1 = Des1(key[:8], self._mode, self._iv,
self._padding, self._padmode)
self.__key2 = Des1(key[8:16], self._mode, self._iv,
self._padding, self._padmode)
if self.key_size == 16:
self.__key3 = self.__key1
else:
self.__key3 = Des1(key[16:], self._mode, self._iv,
self._padding, self._padmode)
DesBase.set_key(self, key)
return
def set_key(self, key):
'''
Will set the crypting key for this object. Either 16 or 24 bytes long.
'''
self.key_size = 24 # Use DES-EDE3 mode
if len(key) != self.key_size:
if len(key) == 16: # Use DES-EDE2 mode
self.key_size = 16
else:
raise ValueError('Key must be either 16 or 24 bytes long.')
if self.get_mode() == CBC:
if not self.get_iv():
# Use the first 8 bytes of the key
self._iv = key[:self.block_size]
if len(self.get_iv()) != self.block_size:
raise ValueError('Invalid IV, must be 8 bytes in length')
self.__key1 = Des1(key[:8], self._mode, self._iv, self._padding,
self._padmode)
self.__key2 = Des1(key[8:16], self._mode, self._iv, self._padding,
self._padmode)
if self.key_size == 16:
self.__key3 = self.__key1
else:
self.__key3 = Des1(key[16:], self._mode, self._iv, self._padding,
self._padmode)
DesBase.set_key(self, key)
return
def set_key(self, key):
'''
Will set the crypting key for this object. Must be 8 bytes.
'''
DesBase.set_key(self, key)
self.__create_sub_keys()
return