ground up refactor!

Keygen/Platforms/PlatformJava.cs

@@ -0,0 +1,94 @@
+using System.Collections.Generic;
+
+namespace FrappeMocha.Keygen.Platforms
+{
+    public class PlatformJava : KeygenBase
+    {
+        public PlatformJava()
+        {
+            Platform = "Java";
+            Products.Add(new KeygenProduct(LicenseTypes.Java3270, "TN3270", Platform));
+            Products.Add(new KeygenProduct(LicenseTypes.Java5250, "TN5250", Platform));
+            Products.Add(new KeygenProduct(LicenseTypes.JavaTelnet, "Telnet", Platform));
+        }
+
+        public override List<string> GenerateLicencetypes(KeygenProduct p)
+        {
+            List<string> types = new List<string>();
+            for (int i = 0; i < 5; i++)
+            {
+                types.Add(((char)(i + 'A')).ToString());
+            }
+            return types;
+        }
+
+        /**
+         * Pretty stright forward implementation as well
+         * .NET is just a copy of PlatformJava afterall
+         */
+        public override string Generate(int itype, string paramCompany, LicenseTypes license)
+        {
+            char type = (char)(itype + 'A');
+            string paramLicencekey = type.ToString() + '@';
+            int sum = 0;
+
+            int i = 0;
+            while (i < paramCompany.Length)
+            {
+                if (paramCompany[i] > ' ')
+                {
+                    // 3270 and 5250 have a hardcoded 0x1b+2 here, we've just added it to the enum
+                    sum += paramCompany[i] + (int)license;
+                }
+                ++i;
+            }
+
+            sum = sum * paramLicencekey[0];
+            sum = sum * (sum & byte.MaxValue) & ushort.MaxValue;
+            paramLicencekey += sum.ToString();
+            return paramLicencekey;
+        }
+
+        /**
+         * Straight outta da JAR
+         */
+        public override bool Check(string paramLicenseKey, string paramCompany, LicenseTypes license)
+        {
+            int i = 0;
+            int n = 0;
+            while (i < paramCompany.Length)
+            {
+                if (paramCompany[i] > ' ')
+                {
+                    // 3270 and 5250 have a hardcoded 0x1b+2 here, we've just added it to the enum
+                    n += paramCompany[i] + (int)license;
+                }
+                ++i;
+            }
+            if (paramLicenseKey.Length > 0)
+            {
+                switch (paramLicenseKey[0])
+                {
+                    case 'A':
+                    case 'B':
+                    case 'C':
+                    case 'D':
+                    case 'E':
+                        break;
+
+                    default:
+                        return false;
+                }
+                int n2 = n * paramLicenseKey[0];
+                n2 = n2 * (n2 & 0xFF) & 0xFFFF;
+
+                string check = paramLicenseKey[0].ToString() + paramLicenseKey[1].ToString() + n2.ToString();
+                if (paramLicenseKey[1] == '@' && check == paramLicenseKey)
+                {
+                    return true;
+                }
+            }
+            return false;
+        }
+    }
+}