def get_widget(self):
""" Get the widget for this cipher.
Returns:
A Gtk.Widget used to control this plugin.
"""
if self._plugin_controller is None:
self._plugin_controller = PluginController(self._parent, self)
return self._plugin_controller.get_widget()
class SubstitutionCipher(Cipher):
"""
This is a Cipher implementation for the simple substitution cipher.
"""
def __init__(self, parent):
""" Create a new SubstitutionCipher instance.
Args:
parent: a class that provides an interafce to CryptographyStudio
"""
self._parent = parent
self._plugin_controller = None
def encrypt(self, plaintext, key):
""" Encrypt the given text.
Args:
plaintext: string, text to encrypt
key: Permutation, key used for encryption
Returns:
String containing encrypted text.
"""
return key(plaintext)
def decrypt(self, ciphertext, key):
""" Decrypt the given text.
Args:
ciphertext: string, text to decrypt
key: key used for decryption
Returns:
String containing decrypted text.
"""
return (~key)(ciphertext)
def get_widget(self):
""" Get the widget for this cipher.
Returns:
A Gtk.Widget used to control this plugin.
"""
if self._plugin_controller is None:
self._plugin_controller = PluginController(self._parent, self)
return self._plugin_controller.get_widget()
