91 lines
3.7 KiB
Plaintext
91 lines
3.7 KiB
Plaintext
using System;
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using System.Linq;
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using System.Collections.Generic;
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using System.Text;
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namespace AniNIX.Crypto {
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public abstract class Cipher {
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//Cipher description to be set by each individual cipher.
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public abstract String Description();
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public abstract String Command();
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/// <summary>
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/// Create a new Cipher
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/// </summary>
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/// <returns>Cipher</returns>
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public Cipher (Workbench w) {
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string helpString = String.Format("{0} -- {1}\n",this.Command().PadRight(16),this.Description().Split('\n')[0]);
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if (!w.HelpText.ToString().Contains(helpString)) {
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w.HelpText.Append(helpString);
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}
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if (!w.SwitchCases.ContainsKey(this.Command())) {
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w.SwitchCases.Add(this.Command(),this);
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}
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}
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public Cipher() {
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}
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/// <summary>
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/// 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.
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/// </summary>
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/// <param name=workSpace>The current version of the text being worked on.</param>
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/// <param name=line>The command sequence.</param>
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/// <returns>The updated version of the workSpace</returns>
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public virtual String RunCommand(String workSpace,String inputText,String[] line) {
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if (workSpace == null || line == null || line.Length < 2) {
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Console.Error.WriteLine("Malformed request.");
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return workSpace;
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}
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switch (line[1]) {
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case "encrypt":
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return Encrypt(workSpace,inputText,line);
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case "decrypt":
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return Decrypt(workSpace,inputText,line);
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case "help":
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case "":
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GetHelp();
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return workSpace;
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default:
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Console.Error.WriteLine("Invalid command. Type help for more.");
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return workSpace;
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}
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}
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/// <summary>
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/// Show the helptext for this cipher. By default, most ciphers will only have encrypt, decrypt, and help functions.
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/// </summary>
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/// <param name=line>This is the incoming line and we use it to get the cipher name</param>
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public virtual void GetHelp() {
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String command = Command();
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Console.WriteLine(String.Format("Help for the {0} cipher suite.\n{1}\n",command,Description()));
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Console.WriteLine("Usage:");
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Console.Write(command);
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Console.WriteLine(" encrypt key -- encrypt with the key");
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Console.Write(command);
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Console.WriteLine(" decrypt key -- decrypt with the key");
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Console.Write(command);
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Console.WriteLine(" help -- show this helptext.");
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}
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/// <summary>
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/// All ciphers must be able to encrypt a string.
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/// </summary>
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/// <param name=workSpace>The current version of the text being worked on.</param>
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/// <param name=line>The command sequence.</param>
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/// <returns>The updated version of the workSpace</returns>
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public abstract String Encrypt(string workSpace,String ciphetText,String[] line);
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/// <summary>
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/// All ciphers must be able to decrypt a string.
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/// </summary>
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/// <param name=workSpace>The current version of the text being worked on.</param>
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/// <param name=line>The command sequence.</param>
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/// <returns>The updated version of the workSpace</returns>
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public abstract String Decrypt(String workSpace,String inputText,String[] line);
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}
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}
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