ground up refactor!

Keygen/Platforms/PlatformJavaScript.cs

@@ -0,0 +1,83 @@
+using System;
+
+namespace FrappeMocha.Keygen.Platforms
+{
+    public class PlatformJavaScript : KeygenBase
+    {
+        public PlatformJavaScript()
+        {
+            Platform = "Google Chrome";
+            Products.Add(new KeygenProduct(LicenseTypes.JavaScript3270, "TN3270", Platform));
+            Products.Add(new KeygenProduct(LicenseTypes.JavaScript5250, "TN5250", Platform));
+            Products.Add(new KeygenProduct(LicenseTypes.JavaScriptTelnet, "Telnet", Platform));
+        }
+
+        /**
+         * This one was fun as well
+         * Found out that the license must end with "45" in order to validate
+         */
+        public override string Generate(int itype, string paramCompany, LicenseTypes license)
+        {
+            char type = (char)(itype + '0');
+            string param_lickey = type.ToString();
+            ulong sum = 0;
+            byte[] byteArray = StrToByteArray(paramCompany);
+            for (int index = 0; index < byteArray.Length; ++index)
+            {
+                if (byteArray[index] >= 'A' && byteArray[index] <= 'Z')
+                    byteArray[index] += 32; // ASCII 'Space'
+            }
+
+            for (int index = 0; index < byteArray.Length; ++index)
+            {
+                if ((ulong)byteArray[index] >= 'A' && (ulong)byteArray[index] <= 'z')
+                {
+                    sum += byteArray[index] + (uint)license;
+                }
+            }
+            sum = sum * param_lickey[0];
+            sum = sum * (sum & byte.MaxValue) & ushort.MaxValue;
+            if (sum < 100U)
+                sum = 2728U;
+
+            param_lickey = (param_lickey[0].ToString() + sum) + '-' +
+                           (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds
+                           + "45"; // a little salt, as a treat
+
+            return param_lickey;
+        }
+
+        /**
+         * Straight outta da JS
+         */
+        public override bool Check(string paramLicenseKey, string paramCompany, LicenseTypes license)
+        {
+            ulong sum = 0;
+            byte[] byteArray = this.StrToByteArray(paramCompany);
+            for (int index = 0; index < byteArray.Length; ++index)
+            {
+                if ((ulong)byteArray[index] >= 65 && (ulong)byteArray[index] <= 90)
+                    byteArray[index] += 32;
+            }
+
+            for (int index = 0; index < byteArray.Length; ++index)
+            {
+                if ((ulong)byteArray[index] >= 65 && (ulong)byteArray[index] <= 122)
+                {
+                    sum += byteArray[index] + (uint)license;
+                }
+            }
+            sum = sum * paramLicenseKey[0];
+            sum = sum * (sum & byte.MaxValue) & ushort.MaxValue;
+            if (sum < 100U)
+                sum = 2728U;
+
+            if (!paramLicenseKey.StartsWith(paramLicenseKey[0].ToString() + sum) || !paramLicenseKey.EndsWith("45"))
+            {
+                return false;
+            }
+
+            return true;
+        }
+    }
+}