okey

Common/Utils/Misc.cs

@@ -0,0 +1,31 @@
+namespace Common.Utils
+{
+    public static class Misc 
+    {
+        public static byte[] StringToByteArray(string hex)
+        {
+            if (hex.Length % 2 == 1)
+                throw new Exception("The binary key cannot have an odd number of digits");
+
+            byte[] arr = new byte[hex.Length >> 1];
+
+            for (int i = 0; i < hex.Length >> 1; ++i)
+            {
+                arr[i] = (byte)((GetHexVal(hex[i << 1]) << 4) + (GetHexVal(hex[(i << 1) + 1])));
+            }
+
+            return arr;
+        }
+
+        public static int GetHexVal(char hex)
+        {
+            int val = (int)hex;
+            //For uppercase A-F letters:
+            //return val - (val < 58 ? 48 : 55);
+            //For lowercase a-f letters:
+            //return val - (val < 58 ? 48 : 87);
+            //Or the two combined, but a bit slower:
+            return val - (val < 58 ? 48 : (val < 97 ? 55 : 87));
+        }
+    }
+}