Inital test for the "lf em4x 410xsim / lf em4x 410xwatch" which I try to verify that the sim works.

Something about speed,  the clock detection is not so good.  should be 64,  usually 67..

client/loclass/fileutils.c

@@ -1,3 +1,41 @@
+/*****************************************************************************
+ * WARNING
+ *
+ * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY. 
+ * 
+ * USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL 
+ * PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL, 
+ * AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES. 
+ * 
+ * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS. 
+ *
+ *****************************************************************************
+ *
+ * This file is part of loclass. It is a reconstructon of the cipher engine
+ * used in iClass, and RFID techology.
+ *
+ * The implementation is based on the work performed by
+ * Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
+ * Milosch Meriac in the paper "Dismantling IClass".
+ *
+ * Copyright (C) 2014 Martin Holst Swende
+ *
+ * This is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with loclass.  If not, see <http://www.gnu.org/licenses/>.
+ * 
+ * 
+ * 
+ ****************************************************************************/
+
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
@@ -45,6 +83,17 @@ int saveFile(const char *preferredName, const char *suffix, const void* data, si
 	return 0;
 }
 
+int loadFile(const char *fileName, void* data, size_t datalen)
+{
+	FILE *filehandle = fopen(fileName, "rb");
+	if(!filehandle) {
+		prnlog("Failed to read from file '%s'", fileName);
+		return 1;
+	}
+	fread(data,datalen,1,filehandle);
+	fclose(filehandle);
+	return 0;
+}
 /**
  * Utility function to print to console. This is used consistently within the library instead
  * of printf, but it actually only calls printf (and adds a linebreak).