Merge branch 'iclass-research' of https://github.com/PenturaLabs/proxmark3 into PenturaLabs-iclass-research

Conflicts:
	README.txt
	armsrc/apps.h
	client/Makefile
	client/cmdhficlass.c
	client/cmdhficlass.h

client/loclass/fileutils.c

@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <stdarg.h>
+#include "fileutils.h"
+#include "ui.h"
+/**
+ * @brief checks if a file exists
+ * @param filename
+ * @return
+ */
+int fileExists(const char *filename) {
+	struct stat st;
+	int result = stat(filename, &st);
+	return result == 0;
+}
+
+int saveFile(const char *preferredName, const char *suffix, const void* data, size_t datalen)
+{
+	int size = sizeof(char) * (strlen(preferredName)+strlen(suffix)+5);
+	char * fileName = malloc(size);
+
+	memset(fileName,0,size);
+	int num = 1;
+	sprintf(fileName,"%s.%s", preferredName, suffix);
+	while(fileExists(fileName))
+	{
+		sprintf(fileName,"%s-%d.%s", preferredName, num, suffix);
+		num++;
+	}
+	/* We should have a valid filename now, e.g. dumpdata-3.bin */
+
+	/*Opening file for writing in binary mode*/
+	FILE *fileHandle=fopen(fileName,"wb");
+	if(!fileHandle) {
+		prnlog("Failed to write to file '%s'", fileName);
+		return 1;
+	}
+	fwrite(data, 1,	datalen, fileHandle);
+	fclose(fileHandle);
+	prnlog("Saved data to '%s'", fileName);
+	free(fileName);
+
+	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).
+ * The reason to have this method is to
+ * make it simple to plug this library into proxmark, which has this function already to
+ * write also to a logfile. When doing so, just delete this function.
+ * @param fmt
+ */
+void prnlog(char *fmt, ...)
+{
+
+	va_list args;
+	va_start(args,fmt);
+    PrintAndLog(fmt, args);
+    //vprintf(fmt,args);
+	va_end(args);
+    //printf("\n");
+}