RandomNumberGenerator

Kryptos/Kryptos/Program.cs

@@ -29,7 +29,8 @@ static async Task<int> Main(string[] args)
                 .WireUpHmacSha512Commands()
                 .WireUpSriCommands()
                 .WireUpOidCommands()
-                .WireUpPfxCommands();
+                .WireUpPfxCommands()
+                .WireUpRngCommands();
 
             return await rootCommand.InvokeAsync(args);
         }

Kryptos/Kryptos/WireUpRngExtensions.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.CommandLine;
+using System.CommandLine.Invocation;
+using System.CommandLine.IO;
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+
+namespace Kryptos
+{
+    public static class WireUpRngExtensions
+    {
+        public static RootCommand WireUpRngCommands(this RootCommand rootCommand)
+        {
+            var rngCommand = new Command("rng", "Random Number Generator");
+            rngCommand.AddOption(new Option<int>(new string[] { "--max", "-m" }, "Maximum (exclusive)"));
+            rngCommand.AddOption(new Option<FileInfo>(new string[] { "--output", "-o" }, "Output file path"));
+
+            rngCommand.Handler = CommandHandler.Create<int, FileInfo, IConsole>(async (max, output, console) =>
+            {
+                try
+                {
+                    if (max <= 0)
+                    {
+                        max = int.MaxValue;
+                    }
+                    var random = RandomNumberGenerator.GetInt32(max);
+
+                    if (output == null)
+                    {
+                        console.Out.WriteLine(random.ToString());
+                    }
+                    else
+                    {
+                        await File.WriteAllTextAsync(output.FullName, random.ToString()).ConfigureAwait(false);
+                    }
+                }
+                catch (Exception ex)
+                {
+                    console.Out.WriteLine(ex.Message);
+                    return 22;
+                }
+                return 0;
+            });
+
+            rootCommand.AddCommand(rngCommand);
+
+            return rootCommand;
+        }
+    }
+}

README.md

@@ -71,7 +71,11 @@ kryptos --help
     ```
     kryptos oid -t 1.3.6.1.5.5.7.3.1
     ```
-    
+6. Encrypt text using a PFX certificate
+    ```
+    kryptos pfx enc -ci MyCertificate.pfx -kt pfxPassword -t "The quick brown fox jumps over the lazy dog."
+    ```    
+
 ## Contributing
 - Fork the repo on [GitHub][git-repo]
 - Clone the project to your own machine