DoFinal

3DSDecrypt/Data/Constants.cs

@@ -9,6 +9,9 @@ namespace ThreeDS.Data
         public static byte[] ExefsCounter = new byte[] { 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
         public static byte[] RomfsCounter = new byte[] { 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 
+        // Note: BigInteger requires the 0x00 at the end of each string in order to preserve the sign value
+        // Note: BigInteger requires that the values be in little endian format, the values in 
+
         // Big Endian - 0x1F, 0xF9, 0xE9, 0xAA, 0xC5, 0xFE, 0x04, 0x08, 0x02, 0x45, 0x91, 0xDC, 0x5D, 0x52, 0x76, 0x8A
         // Little Endian - 0x8A, 0x76, 0x52, 0x5D, 0xDC, 0x91, 0x45, 0x02, 0x08, 0x04, 0xFE, 0xC5, 0xAA, 0xE9, 0xF9, 0x1F
         public static BigInteger AESHardwareConstant = new BigInteger(new byte[] { 0x8A, 0x76, 0x52, 0x5D, 0xDC, 0x91, 0x45, 0x02, 0x08, 0x04, 0xFE, 0xC5, 0xAA, 0xE9, 0xF9, 0x1F });
@@ -37,7 +40,7 @@ namespace ThreeDS.Data
 
         #endregion
 
-        #region Dev Keys (Must be converted to LE)
+        #region Dev Keys
 
         // Dev KeyX 0x18 (New 3DS 9.3)
         // Big Endian - 0x30, 0x4B, 0xF1, 0x46, 0x83, 0x72, 0xEE, 0x64, 0x11, 0x5E, 0xBD, 0x40, 0x93, 0xD8, 0x42, 0x76

3DSDecrypt/ThreeDSTool.cs

@@ -183,7 +183,7 @@ namespace ThreeDS
 
                                     if (datalenB > 0)
                                     {
-                                        g.Write(exefsctrmode2C.ProcessBytes(exefsctrmode.ProcessBytes(f.ReadBytes((int)datalenB))));
+                                        g.Write(exefsctrmode2C.DoFinal(exefsctrmode.DoFinal(f.ReadBytes((int)datalenB))));
                                         g.Flush();
                                     }
 
@@ -571,13 +571,11 @@ namespace ThreeDS
 
         private static string ToBytes(int num)
         {
-            string numstr = "";
-            int tmp = num;
-
+            string numstr = string.Empty;
             while (numstr.Length < 16)
             {
-                numstr += (char)(tmp & 0xFF);
-                tmp >>= 8;
+                numstr += (char)(num & 0xFF);
+                num >>= 8;
             }
 
             return numstr;