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zeyadetmanzeyadetman
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playfair needs fixes
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‎SecurityLibrary/AES/AES.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary.AES
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{
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/// <summary>
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/// If the string starts with 0x.... then it's Hexadecimal not string
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/// </summary>
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public class AES : CryptographicTechnique
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{
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public override string Decrypt(string cipherText, string key)
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{
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throw new NotImplementedException();
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}
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public override string Encrypt(string plainText, string key)
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{
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throw new NotImplementedException();
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}
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}
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}

‎SecurityLibrary/AES/ExtendedEuclid.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary.AES
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{
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public class ExtendedEuclid
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{
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/// <summary>
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///
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/// </summary>
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/// <param name="number"></param>
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/// <param name="baseN"></param>
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/// <returns>Mul inverse, -1 if no inv</returns>
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public int GetMultiplicativeInverse(int number, int baseN)
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{
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throw new NotImplementedException();
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}
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}
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}

‎SecurityLibrary/CryptographicTechnique.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary
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{
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public abstract class CryptographicTechnique : ICryptographicTechnique<string, string>
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{
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public string Analyse(string plainText, string cipherText)
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{
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throw new NotSupportedException();
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}
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public abstract string Decrypt(string cipherText, string key);
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public abstract string Encrypt(string plainText, string key);
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}
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}

‎SecurityLibrary/DES/DES.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary.DES
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{
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/// <summary>
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/// If the string starts with 0x.... then it's Hexadecimal not string
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/// </summary>
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public class DES : CryptographicTechnique
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{
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public override string Decrypt(string cipherText, string key)
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{
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throw new NotImplementedException();
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}
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public override string Encrypt(string plainText, string key)
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{
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throw new NotImplementedException();
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}
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}
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}

‎SecurityLibrary/DES/TripleDES.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary.DES
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{
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/// <summary>
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/// If the string starts with 0x.... then it's Hexadecimal not string
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/// </summary>
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public class TripleDES : ICryptographicTechnique<string, List<string>>
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{
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public string Decrypt(string cipherText, List<string> key)
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{
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throw new NotImplementedException();
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}
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public string Encrypt(string plainText, List<string> key)
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{
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throw new NotImplementedException();
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}
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public List<string> Analyse(string plainText,string cipherText)
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{
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throw new NotSupportedException();
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}
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}
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}

‎SecurityLibrary/DiffieHellman/DiffieHellman.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary.DiffieHellman
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{
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public class DiffieHellman
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{
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public List<int> GetKeys(int q, int alpha, int xa, int xb)
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{
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throw new NotImplementedException();
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}
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}
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}

‎SecurityLibrary/Exceptions/InvalidAnlysisException.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary
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{
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public class InvalidAnlysisException : Exception
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{
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}
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}

‎SecurityLibrary/ICryptographicTechnique.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary
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{
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public interface ICryptographicTechnique<T, K>
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{
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/// <summary>
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/// This encrypts the given plain text with the given key.
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/// </summary>
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/// <param name="plainText">The plain text.</param>
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/// <param name="key">The key.</param>
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/// <returns>The cipher text.</returns>
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T Encrypt(T plainText, K key);
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/// <summary>
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/// This decrypts the given cipher text with the given key.
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/// </summary>
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/// <param name="plainText">The plain text.</param>
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/// <param name="key">The key.</param>
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/// <returns>The plain text.</returns>
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T Decrypt(T cipherText, K key);
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/// <summary>
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/// Finds the key of the given Plain text and cipher text.
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/// </summary>
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/// <param name="plainText">The plain text.</param>
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/// <param name="cipherText">The cipher text.</param>
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/// <returns>The key text.</returns>
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/// Throws InvalidAnlysisException if key cannot be found with the given data.
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K Analyse(T plainText, T cipherText);
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}
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}

‎SecurityLibrary/MD5/MD5.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary.MD5
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{
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public class MD5
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{
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public string GetHash(string text)
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{
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throw new NotImplementedException();
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}
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}
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}

‎SecurityLibrary/MainAlgorithms/AutokeyVigenere.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary
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{
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public class AutokeyVigenere : ICryptographicTechnique<string, string>
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{
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public string Analyse(string plainText, string cipherText)
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{
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throw new NotImplementedException();
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}
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public string Decrypt(string cipherText, string key)
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{
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throw new NotImplementedException();
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}
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public string Encrypt(string plainText, string key)
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{
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throw new NotImplementedException();
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}
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}
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}

‎SecurityLibrary/MainAlgorithms/Ceaser.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace SecurityLibrary
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{
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public class Ceaser : ICryptographicTechnique<string, int>
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{
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public string alphabet = "abcdefghijklmnopqrstuvwxyz";
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public int letterNum(char letter) // O(1)
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{
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for (int i = 0; i < 26; i++)
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{
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if (letter == alphabet[i]) return i;
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}
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return -1;
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}
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public string Encrypt(string plainText, int key)
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{
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int PTLength = plainText.Length;
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string CT = "";
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for (int i = 0; i < PTLength; i++) // O(N)
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{
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if (char.IsLetter(plainText[i]))
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{
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int letterIndx = ((key + letterNum(plainText[i]))%26);
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CT += char.ToUpper(alphabet[letterIndx]);
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}
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else
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{
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CT += plainText[i];
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}
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}
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return CT;
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}
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public string Decrypt(string cipherText, int key)
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{
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cipherText = cipherText.ToLower();
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int CTLength = cipherText.Length;
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string PT = "";
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for (int i = 0; i < CTLength; i++) // O(N)
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{
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if (char.IsLetter(cipherText[i]))
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{
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int letterIndx = ((letterNum(cipherText[i]) - key) % 26);
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if(letterIndx < 0) letterIndx += 26;
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PT += alphabet[letterIndx];
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}
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else
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{
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PT += cipherText[i];
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}
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}
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return PT;
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}
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public int Analyse(string plainText, string cipherText) // O(1)
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{
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if (plainText.Length != cipherText.Length) return -1;
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int letterPN = letterNum(plainText[0]);
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int letterCN = letterNum(char.ToLower(cipherText[0]));
70+
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return ((letterCN - letterPN) < 0) ? (letterCN - letterPN) + 26 : (letterCN - letterPN) % 26;
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}
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}
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}

‎SecurityLibrary/MainAlgorithms/Columnar.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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7+
namespace SecurityLibrary
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{
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public class Columnar : ICryptographicTechnique<string, List<int>>
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{
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public List<int> Analyse(string plainText, string cipherText)
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{
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throw new NotImplementedException();
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}
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public string Decrypt(string cipherText, List<int> key)
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{
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throw new NotImplementedException();
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}
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public string Encrypt(string plainText, List<int> key)
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{
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throw new NotImplementedException();
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}
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}
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}

‎SecurityLibrary/MainAlgorithms/HillCipher.cs

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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
6+
7+
namespace SecurityLibrary
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{
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/// <summary>
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/// The List<int> is row based. Which means that the key is given in row based manner.
11+
/// </summary>
12+
public class HillCipher : ICryptographicTechnique<string, string>, ICryptographicTechnique<List<int>, List<int>>
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{
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public List<int> Analyse(List<int> plainText, List<int> cipherText)
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{
16+
throw new NotImplementedException();
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}
18+
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public string Analyse(string plainText, string cipherText)
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{
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throw new NotImplementedException();
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}
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public List<int> Decrypt(List<int> cipherText, List<int> key)
25+
{
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throw new NotImplementedException();
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}
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public string Decrypt(string cipherText, string key)
30+
{
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throw new NotImplementedException();
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}
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public List<int> Encrypt(List<int> plainText, List<int> key)
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{
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throw new NotImplementedException();
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}
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public string Encrypt(string plainText, string key)
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{
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throw new NotImplementedException();
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}
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public List<int> Analyse3By3Key(List<int> plain3, List<int> cipher3)
45+
{
46+
throw new NotImplementedException();
47+
}
48+
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public string Analyse3By3Key(string plain3, string cipher3)
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{
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throw new NotImplementedException();
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}
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}
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}

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