CryptoWorkbench/Cipher.csharp

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using System;
using System.Linq;
using System.Collections.Generic;
using System.Text;
namespace AniNIX.Crypto {
public abstract class Cipher {
//Cipher description to be set by each individual cipher.
public abstract String Description();
public abstract String Command();
/// <summary>
/// Create a new Cipher
/// </summary>
/// <returns>Cipher</returns>
public Cipher (Workbench w) {
string helpString = String.Format("{0} -- {1}\n",this.Command().PadRight(16),this.Description().Split('\n')[0]);
if (!w.HelpText.ToString().Contains(helpString)) {
w.HelpText.Append(helpString);
}
if (!w.SwitchCases.ContainsKey(this.Command())) {
w.SwitchCases.Add(this.Command(),this);
}
}
public Cipher() {
}
/// <summary>
/// We should be able to act on a workspace and command line. Most ciphers will use the same syntax. Those that don't can override.
/// </summary>
/// <param name=workSpace>The current version of the text being worked on.</param>
/// <param name=line>The command sequence.</param>
/// <returns>The updated version of the workSpace</returns>
public virtual String RunCommand(String workSpace,String inputText,String[] line) {
if (workSpace == null || line == null || line.Length < 2) {
Console.Error.WriteLine("Malformed request.");
return workSpace;
}
switch (line[1]) {
case "encrypt":
return Encrypt(workSpace,inputText,line);
case "decrypt":
return Decrypt(workSpace,inputText,line);
case "help":
GetHelp();
return workSpace;
default:
Console.Error.WriteLine("Invalid command. Type help for more.");
return workSpace;
}
}
/// <summary>
/// Show the helptext for this cipher. By default, most ciphers will only have encrypt, decrypt, and help functions.
/// </summary>
/// <param name=line>This is the incoming line and we use it to get the cipher name</param>
public virtual void GetHelp() {
Console.WriteLine(String.Format("Help for the {0} cipher suite.\n{1}\n",Command(),Description()));
Console.WriteLine("encrypt key -- encrypt with the key\ndecrypt key -- decrypt with the key\nhelp -- show this helptext.");
}
/// <summary>
/// All ciphers must be able to encrypt a string.
/// </summary>
/// <param name=workSpace>The current version of the text being worked on.</param>
/// <param name=line>The command sequence.</param>
/// <returns>The updated version of the workSpace</returns>
public abstract String Encrypt(string workSpace,String ciphetText,String[] line);
/// <summary>
/// All ciphers must be able to decrypt a string.
/// </summary>
/// <param name=workSpace>The current version of the text being worked on.</param>
/// <param name=line>The command sequence.</param>
/// <returns>The updated version of the workSpace</returns>
public abstract String Decrypt(String workSpace,String inputText,String[] line);
}
}