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#Enigma simulator with 2 rotors how to

rotors - An array of integers that are the rotor numbers to be used.text - The string that is to be encrypted/decrypted.This function performs Enigma M3 encryption/decryption. The returned value is a string that is the decrypted text. It has a default value of the identity rotor (Note: when this is the identity rotor the text will not be altered by decryption). reflector - A rotor object that is the reflector to be used.The only difference between this and Enc is that it uses getInvRotorArr instead of getRotorArr. It does this by iterating through the string and if the character is a letter it decrypts it and otherwise it is ignored. This function performs enigma decryption of a given string using given rotors, reflector, plugboard and starting positions. The returned value is a string that is the encrypted text. It has a default value of the identity rotor. plugboard- A rotor object that is the plugboard to be used.It has a default value of the identity rotor (Note: when this is the identity rotor the text will not be altered by encryption). It has a default value of an empty array (the function fills this in with zeros). pos - An array of integers that are the starting positions to be used.It has a default value of an array containing the identity rotor. It does this by iterating through the string and if the character is a letter it encrypts it and otherwise it is ignored. This function performs enigma encryption of a given string using given rotors, reflector, plugboard and starting positions. The returned value is the encrypted/decrypted letter. pos - The array of integers to be used as rotor positions.rotors - An array of rotor objects that are the rotors to use to encrypt/decrypt the given character.char_num - An integer that is a 0-25 encoding of a letter where 'A' is 1, 'B' is 2, etc.This function runs a given character through an array of rotors using the given rotor positions. The returned value is the array of rotor positions created. pos - An array of integers that is the rotor positions to use.This function creates an array of rotor positions to use in enigma encryption/decryption. The only difference with getRotorArr is that this function uses the inverse of the reflector. This function creates an array of rotor objects in the order they need to be performed for enigma decryption. The returned value is an array of rotor objects in the order they need to be performed. plugboard - A rotor object that is the plugboard to be used.

rotors - The array of rotors to be used.

This function creates an array of rotor objects in the order they need to be performed for enigma encryption. The returned value is the incremented array.

pos - An array of integers that is the rotor position array to be incremented.

This function increments a rotor positions array. This function creates an identity rotor object (it creates a rotor that does not change any letter). The returned value is a rotor object that is the plugboard created.

in_str - This string contains space separated pairs of letters to be swapped by the plugboard being created.

This function takes a string containing pairs of characters to be swapped by a plugboard and create a plugboard from this. The returned value is an array of integers representing the permutation.

in_str - The string representing the permutation to be created.

It then constructs an array of the relative ordinal values of each letter before and after the permutation. It does this by checking that the lowercase string is 26 characters long and contains letter. This function turns a string representing the result of a permutation on the alphabet into that permutation for use in constructing rotors.

_str_ - This method returns a string that is the alphabet 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' under the permutation of this rotor in position 0.

inverse - This method creates a rotor object that is the inverse of this one.

With the parameters letters are given as integers with 'A' as 0, 'B' as 1, 'C' as 2, etc.

permute - This method performs the permutation of the rotor on a given character (given as an integer) with the given rotor position which is also given as an integer.

It instantiates an object of the class and stores permutation as an attribute.

_init_ - This method takes a single parameter permutation (an array integers that stores the relative changes of different characters under the permutation).

This class is to implement the rotors and permutations (plugboard and reflector) used by Enigma.

#Enigma simulator with 2 rotors how to

To implement Enigma within python, we have put together a tutorial to talk you though how to code an Enigma function: