First release build.

MetroUnlocker/LibTSForge/Modifiers/ProductKeyInstaller.cs

@@ -0,0 +1,36 @@
+using System;
+
+using MetroUnlocker.LibTSForge.SPP;
+
+namespace MetroUnlocker.LibTSForge.Modifiers
+{
+    public static class ProductKeyInstaller
+    {
+        public static void InstallGeneratedProductKey(PhysicalStoreVersion version, bool production, Guid actId)
+        {
+            ProductKeyConfig keyConfig = new ProductKeyConfig();
+            
+            keyConfig.LoadConfig(actId);
+
+            ProductConfig config;
+            keyConfig.Products.TryGetValue(actId, out config);
+
+            if (config == null) throw new ArgumentException("Activation ID " + actId + " not found in ProductKeyConfig.");
+
+            ProductKey pkey = config.GetRandomKey();
+
+            Guid instPkeyId = SLApi.GetInstalledProductKeyId(actId);
+            if (instPkeyId != Guid.Empty) SLApi.UninstallProductKey(instPkeyId);
+
+            if (pkey.Algorithm != PKeyAlgorithm.PKEY2009)
+                throw new Exception("The key algorithm isn't 2009");
+            
+            uint status = SLApi.InstallProductKey(pkey);
+
+            if (status != 0)
+                throw new ApplicationException("Failed to install generated product key.");
+
+            return;
+        }
+    }
+}