1 files changed, 101 insertions, 0 deletions
diff --git a/win/CS/HandBrakeTools/Program.cs b/win/CS/HandBrakeTools/Program.cs
new file mode 100644
index 000000000..d4da0dbf5
--- /dev/null
+++ b/win/CS/HandBrakeTools/Program.cs
@@ -0,0 +1,101 @@
+// --------------------------------------------------------------------------------------------------------------------
+// <copyright file="Program.cs" company="HandBrake Project (http://handbrake.fr)">
+//   This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
+// </copyright>
+// <summary>
+//   HandBrake Toolkit
+// </summary>
+// --------------------------------------------------------------------------------------------------------------------
+
+namespace HandBrakeTools
+{
+    using System;
+    using System.Diagnostics;
+    using System.IO;
+    using System.Security.Cryptography;
+
+    public class Program
+    {
+        static void Main(string[] args)
+        {
+            if (args.Length == 0)
+            {
+                Console.WriteLine("Invalid Comand.  Either 'genkeys' or 'sign <filename>'");
+                Console.Read();
+                return;
+            }
+
+            string command = args[0];
+            string file = args.Length > 1 ? args[1] : null;
+            switch (command)
+            {
+                case "genkeys":
+                    GenKeyFiles();
+                    return;
+                case "sign":
+                    string hash = SignDownload(file);
+                    Console.WriteLine(VerifyDownload(hash, file) ? "Passed Verification Test" : "Failed Verification Test");
+                    Console.WriteLine("Hash: " + hash);
+                    File.WriteAllText("file.hash", hash);
+                    return;
+            }
+
+            Console.WriteLine("Done.");
+            Console.Read();
+        }
+
+        public static void GenKeyFiles()
+        {
+            RSACryptoServiceProvider provider = new RSACryptoServiceProvider { KeySize = 2048 };
+
+            using (StreamWriter sw = new StreamWriter("private.key"))
+            {
+                sw.Write(provider.ToXmlString(true));
+            }
+
+            using (StreamWriter sw = new StreamWriter("public.key"))
+            {
+                sw.Write(provider.ToXmlString(false));
+            }
+        }
+
+        public static string SignDownload(string updateFile)
+        {
+            RSACryptoServiceProvider provider = new RSACryptoServiceProvider();
+            provider.FromXmlString(File.ReadAllText("private.key"));
+            byte[] signedBytes = provider.SignData(File.ReadAllBytes(updateFile), "SHA256");
+            return Convert.ToBase64String(signedBytes);
+        }
+
+        public static bool VerifyDownload(string signature, string updateFile)
+        {
+            // Sanity Checks
+            if (!File.Exists(updateFile))
+            {
+                return false;
+            }
+
+            if (string.IsNullOrEmpty(signature))
+            {
+                return false;
+            }
+
+            // Fetch our Public Key
+            string publicKey = File.ReadAllText("public.key");
+
+            // Verify the file against the Signature. 
+            try
+            {
+                byte[] file = File.ReadAllBytes(updateFile);
+                RSACryptoServiceProvider verifyProfider = new RSACryptoServiceProvider();
+                verifyProfider.FromXmlString(publicKey);
+                return verifyProfider.VerifyData(file, "SHA256", Convert.FromBase64String(signature));
+            }
+            catch (Exception e)
+            {
+                Debug.WriteLine(e);
+                return false;
+            }
+        }
+    }
+}