klips/cpp/cryptography/columnar-transposition/driver.cpp

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/*##############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2021 Shaun Reed, all rights reserved ##
## About: An example of using columnar transposition cipher ##
## + Using concept at www.braingle.com/brainteasers/codes/columnartrans.php ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
################################################################################
*/
#include "lib-cipher.hpp"
#include<iostream>
// Columnar transposition cipher
// https://www.braingle.com/brainteasers/codes/columnartrans.php#form
// NOTE: Must check the 'irregular case' box to produce same results
// + I only used the irregular case to encrypt and decrypt
// + I did not write any code for testing with the regular case
/******************************************************************************/
// Main program loop
int main (const int argc, const char * argv[]) {
// Left some test cases I used commented out :)
// + Keywords and messages can be URLs, include spaces, symbols, numbers, etc
// Using example keyword from www.braingle.com
// + The embedded example there doesn't seem to support numbers in keywords :(
Columnar cData("ZEBRAS");
// Taking user input for keyword using Columnar ctor
// Columnar cData;
int choice = 0;
bool exit = false;
std::string message; // Message to encrypt or decrypt
while (!exit) {
std::string result;
switch (choice) {
case 1:
std::cout << "\nEncrypting...\n";
// Encrypt example from www.braingle.com
result = cData.Encrypt("WEAREDISCOVEREDFLEEATONCE");
// Take input for encrypting a message
// result = cData.Encrypt();
std::cout << "Encrypted message: \"" << result << "\"\n";
exit = true;
break;
case 2:
std::cout << "\nDecrypting...\n";
// Encrypt, decrypt example from www.braingle.com
result = cData.Decrypt(cData.Encrypt("WEAREDISCOVEREDFLEEATONCE"));
// Take input for previously encrypted message to decrypt
// result = cData.Decrypt();
std::cout << "Decrypted message: \"" << result << "\"\n";
exit = true;
break;
default:
std::cout << "What would you like to do?\n1. Encrypt\n2. Decrypt\n";
// Take input, handle it accordingly
// + https://www.cplusplus.com/forum/general/207458/
if (!(std::cin >> choice)) {
std::cout << "Invalid character input, choose an option below\n";
}
else if (choice != 1 && choice != 2) {
std::cout << "Incorrect option entered (" << choice << ")\n";
}
std::cin.clear();
std::cin.ignore();
break;
}
}
return 0;
}