[saco] Implement K_EncodeString and K_DecodeString

saco/runutil.cpp

@@ -234,4 +234,43 @@ void Util_Base64Encode( char *cpInput, char *cpOutput )
 	return;
 }
 
-//----------------------------------------------------
+//----------------------------------------------------
+// Simple rotate right 3 character encoding for
+// hiding strings in the exe.
+
+void K_EncodeString(char *szInput, char *szOutput)
+{
+	char b;
+
+	while(*szInput) {
+		b = *szInput;
+		_asm mov bl, b
+		_asm ror bl, 3
+		_asm mov b, bl
+		*szOutput = b;
+		szInput++;
+		szOutput++;
+	}
+	*szOutput = 0;
+}
+
+//----------------------------------------------------
+
+char * K_DecodeString(unsigned char *szInput)
+{
+	char b;
+	char *st = (char *)szInput;
+
+	while(*szInput) {
+		b = *szInput;
+		_asm mov bl, b
+		_asm rol bl, 3
+		_asm mov b, bl
+		*szInput = b;
+		szInput++;
+	}
+
+	return st;
+}
+
+//----------------------------------------------------

saco/runutil.h

@@ -9,4 +9,7 @@ char *Util_strrev(char *str);
 char * Util_itoa(int v, char *s, int r);
 void Util_Base64Encode( char *cpInput, char *cpOutput );
 
+char * K_DecodeString(unsigned char *szInput);
+void K_EncodeString(char *szInput, char *szOutput);
+
 //----------------------------------------------------