CryptoWorkbench/Ubchi.csharp

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using System;
using System.Linq;
using System.IO;
using System.Text;
using System.Collections.Generic;
namespace AniNIX.Crypto {
public class Ubchi : Cipher {
public override String Description() { return "The Ubchi cipher\nThis is a regular double-transposition cipher -- it will add some garbage to the end of your string.\nKey format is any word to use for the transposition.\nNOTE: This does not completely match Rumkin, whose implementation is a little flawed."; }
public override String Command() { return "ubchi"; }
public Ubchi(Workbench w) : base (w) {}
private ColumnTransposition col = new ColumnTransposition();
/// <summary>
/// Encrypt a string with the cipher
/// </summary>
/// <param name="workSpace">The working copy of the cipher</param>
/// <param name="inputText">The original cipher</param>
/// <param name="line">The user input</param>
/// <returns>The encrypted string</returns>
public override String Encrypt(String workSpace,String inputText,String[] line) {
if (line == null || line.Length != 3) {
Console.Error.WriteLine("Malformed!");
return workSpace;
}
// Pad the incoming workspace
String changed = CharGrid.RandPad(workSpace,line[2].Length);
// Transpose twice.
changed = col.Encrypt(changed,inputText,line);
changed = col.Encrypt(changed,inputText,line);
return changed;
}
/// <summary>
/// Decrypt a string with the cipher
/// </summary>
/// <param name="workSpace">The working copy of the cipher</param>
/// <param name="inputText">The original cipher</param>
/// <param name="line">The user input</param>
/// <returns>The encrypted string</returns>
public override String Decrypt(String workSpace,String inputText,String[] line) {
if (line == null || line.Length != 3) {
Console.Error.WriteLine("Malformed!");
return workSpace;
}
// De-transpose twice. Without encrypting a number, we don't have a way to programmatically trim.
String changed = col.Decrypt(workSpace,inputText,line);
changed = col.Decrypt(changed,inputText,line);
return changed;
}
}
}