klips/cpp/cryptography/columnar-transposition/lib-cipher.hpp

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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 ##
################################################################################
*/
#ifndef COLUMNARTRANSPOSITION_LIB_CIPHER_HPP
#define COLUMNARTRANSPOSITION_LIB_CIPHER_HPP
#include <iostream>
#include<algorithm>
#include<vector>
/******************************************************************************/
// KeyData struct to hold data related to key ciphers
struct KeyData {
explicit KeyData(std::string key) : keyWord_(std::move(key)) {};
explicit KeyData() : keyWord_(GetKey()) {};
// Pure virtual dtor to make abstract class despite no pure virtual members
virtual ~KeyData() = 0;
// Allows getting keyWord when using KeyData default ctor
static std::string GetKey()
{
std::string key;
std::cout << "Enter the keyword: ";
std::getline(std::cin, key);
std::cout << "Keyword entered: \"" << key << "\"\n";
return key;
}
protected:
std::string keyWord_;
};
// Definition of pure virtual dtor
/******************************************************************************/
// Columnar struct to define methods related to columnar transposition
struct Columnar : KeyData {
// Can't create this object without providing a keyWord to initialize order
explicit Columnar(std::string keyWord) : KeyData(std::move(keyWord))
{
InitOrder(keyWord_);
}
// Inherit call to GetKey() from KeyData default ctor
Columnar() { InitOrder(keyWord_);}
// Initializes orderVect to determine order columns should be used
void InitOrder(std::string temp);
/****************************************************************************/
// Member function definitions
void ValidateKeyword(const std::string &message);
// Transpose a character matrix, using a vector of strings
static void Transpose(const std::vector<std::string> &in,
std::vector<std::string> &out);
// Default parameter allows calling Encrypt() to take message input
std::string Encrypt(std::string message="");
// Default parameter allows calling Decrypt() to take message input
std::string Decrypt(std::string message="");
private:
std::vector<int> orderVect_;
};
#endif // COLUMNARTRANSPOSITION_LIB_CIPHER_HPP