75 lines
2.7 KiB
C++
75 lines
2.7 KiB
C++
/*##############################################################################
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## Author: Shaun Reed ##
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## Legal: All Content (c) 2021 Shaun Reed, all rights reserved ##
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## About: An example of using columnar transposition cipher ##
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## + Using concept at www.braingle.com/brainteasers/codes/columnartrans.php ##
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## ##
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## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
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################################################################################
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*/
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#ifndef COLUMNARTRANSPOSITION_LIB_CIPHER_HPP
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#define COLUMNARTRANSPOSITION_LIB_CIPHER_HPP
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#include <iostream>
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#include<algorithm>
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#include<vector>
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/******************************************************************************/
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// KeyData struct to hold data related to key ciphers
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struct KeyData {
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explicit KeyData(std::string key) : keyWord_(std::move(key)) {};
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explicit KeyData() : keyWord_(GetKey()) {};
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// Pure virtual dtor to make abstract class despite no pure virtual members
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virtual ~KeyData() = 0;
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// Allows getting keyWord when using KeyData default ctor
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static std::string GetKey()
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{
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std::string key;
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std::cout << "Enter the keyword: ";
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std::getline(std::cin, key);
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std::cout << "Keyword entered: \"" << key << "\"\n";
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return key;
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}
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protected:
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std::string keyWord_;
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};
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// Definition of pure virtual dtor
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/******************************************************************************/
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// Columnar struct to define methods related to columnar transposition
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struct Columnar : KeyData {
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// Can't create this object without providing a keyWord to initialize order
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explicit Columnar(std::string keyWord) : KeyData(std::move(keyWord))
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{
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InitOrder(keyWord_);
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}
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// Inherit call to GetKey() from KeyData default ctor
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Columnar() { InitOrder(keyWord_);}
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// Initializes orderVect to determine order columns should be used
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void InitOrder(std::string temp);
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/****************************************************************************/
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// Member function definitions
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void ValidateKeyword(const std::string &message);
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// Transpose a character matrix, using a vector of strings
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static void Transpose(const std::vector<std::string> &in,
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std::vector<std::string> &out);
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// Default parameter allows calling Encrypt() to take message input
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std::string Encrypt(std::string message="");
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// Default parameter allows calling Decrypt() to take message input
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std::string Decrypt(std::string message="");
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private:
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std::vector<int> orderVect_;
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};
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#endif // COLUMNARTRANSPOSITION_LIB_CIPHER_HPP
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