ground up refactor!

Keygen/Platforms/PlatformWindows.cs

@@ -0,0 +1,81 @@
+using System;
+
+namespace FrappeMocha.Keygen.Platforms
+{
+    public class PlatformWindows : KeygenBase
+    {
+        public PlatformWindows()
+        {
+            Platform = "Windows";
+            Products.Add(new KeygenProduct(LicenseTypes.Windows3270, "TN3270", Platform));
+            Products.Add(new KeygenProduct(LicenseTypes.Windows5250, "TN5250", Platform));
+            Products.Add(new KeygenProduct(LicenseTypes.Windows3812, "TN3812", Platform));
+            Products.Add(new KeygenProduct(LicenseTypes.WindowsTelnet, "Telnet", Platform));
+        }
+        
+        public override string Generate(int type, string paramCompany, LicenseTypes license)
+        {
+            string licenseKey = type.ToString();
+            uint 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 (byteArray[index] >= 'A')
+                    sum += byteArray[index] + (uint)license;
+            }
+            sum = sum * licenseKey[0];
+            sum = (uint)((int)sum * ((int)sum & byte.MaxValue) & ushort.MaxValue);
+            if (sum < 100U)
+                sum = 2728U;
+
+            licenseKey = (licenseKey[0].ToString() + sum) + '-' +
+                           (Int32)(DateTime.UtcNow.Subtract(new DateTime(1970, 1, 1))).TotalSeconds;
+
+
+            return licenseKey;
+        }
+
+        /**
+         * Straight outta da Assembley
+         */
+        public override bool Check(string paramLicenseKey, string paramCompany, LicenseTypes license)
+        {
+            uint num1 = 0;
+            if (paramCompany == null || paramCompany.Length < 2)
+                return false;
+            byte[] byteArray = this.StrToByteArray(paramCompany);
+            if (paramLicenseKey == null || paramLicenseKey.Length < 6)
+                return false;
+
+            for (int index = 0; index < byteArray.Length; ++index)
+            {
+                // >= 'A' && <= 'Z'
+                if ((int)byteArray[index] >= 65 && (int)byteArray[index] <= 90)
+                    byteArray[index] += (byte)32;
+            }
+            for (int index = 0; index < byteArray.Length; ++index)
+            {
+                if ((int)byteArray[index] >= 65) // 'A'
+                    num1 += (uint)byteArray[index] + (uint)license;
+            }
+            uint num2 = num1 * (uint)paramLicenseKey[0];
+            uint num3 = (uint)((int)num2 * ((int)num2 & (int)byte.MaxValue) & (int)ushort.MaxValue);
+            if (num3 < 100U)
+                num3 = 2728U;
+
+            if (paramLicenseKey.StartsWith((paramLicenseKey[0].ToString() ?? "") + (object)num3))
+            {
+                //this.aa = param_lickey.Substring(0, 1);
+                return true;
+            }
+            //this.aa = "";
+            return false;
+        }
+    }
+}