Major rework of hf mf nested:

- PM: used GetCountMifare in MifareNested() for improved timing accuracy and to deliver better quality nonces
- PM: MifareNested now delivers exactly two different nonces to avoid time consuming multiple lfsr_recovery32() on client side
- Client: replaced quicksort by bucketsort in crapto1.c which is faster 
- Client: use multithreading (two parallel calls to lfsr_recovery32())
- Client: fixed a small bug in mfnested() (always showed trgkey=0)
- Client: introduced a mutex for PrintAndLog() to avoid interlaced printing
Minor rework of hf mf chk:
- Avoid time consuming off/on cycles. Send a "halt" instead.

client/ui.c

@@ -14,6 +14,7 @@
 #include <stdio.h>
 #include <time.h>
 #include <readline/readline.h>
+#include <pthread.h>
 
 #include "ui.h"
 
@@ -21,23 +22,28 @@ double CursorScaleFactor;
 int PlotGridX, PlotGridY, PlotGridXdefault= 64, PlotGridYdefault= 64;
 int offline;
 
+extern pthread_mutex_t print_lock;
+
 static char *logfilename = "proxmark3.log";
 
 void PrintAndLog(char *fmt, ...)
 {
 	char *saved_line;
 	int saved_point;
-  va_list argptr, argptr2;
-  static FILE *logfile = NULL;
-  static int logging=1;
+	va_list argptr, argptr2;
+	static FILE *logfile = NULL;
+	static int logging=1;
 
-  if (logging && !logfile) {
-    logfile=fopen(logfilename, "a");
-    if (!logfile) {
-      fprintf(stderr, "Can't open logfile, logging disabled!\n");
-      logging=0;
-    }
-  }
+	// lock this section to avoid interlacing prints from different threats
+	pthread_mutex_lock(&print_lock);
+  
+	if (logging && !logfile) {
+		logfile=fopen(logfilename, "a");
+		if (!logfile) {
+			fprintf(stderr, "Can't open logfile, logging disabled!\n");
+			logging=0;
+		}
+	}
 	
 	int need_hack = (rl_readline_state & RL_STATE_READCMD) > 0;
 
@@ -49,12 +55,12 @@ void PrintAndLog(char *fmt, ...)
 		rl_redisplay();
 	}
 	
-  va_start(argptr, fmt);
-  va_copy(argptr2, argptr);
-  vprintf(fmt, argptr);
-  printf("          "); // cleaning prompt
-  va_end(argptr);
-  printf("\n");
+	va_start(argptr, fmt);
+	va_copy(argptr2, argptr);
+	vprintf(fmt, argptr);
+	printf("          "); // cleaning prompt
+	va_end(argptr);
+	printf("\n");
 
 	if (need_hack) {
 		rl_restore_prompt();
@@ -64,14 +70,18 @@ void PrintAndLog(char *fmt, ...)
 		free(saved_line);
 	}
 	
-  if (logging && logfile) {
-    vfprintf(logfile, fmt, argptr2);
-    fprintf(logfile,"\n");
-    fflush(logfile);
-  }
-  va_end(argptr2);
+	if (logging && logfile) {
+		vfprintf(logfile, fmt, argptr2);
+		fprintf(logfile,"\n");
+		fflush(logfile);
+	}
+	va_end(argptr2);
+
+	//release lock
+	pthread_mutex_unlock(&print_lock);  
 }
 
+
 void SetLogFilename(char *fn)
 {
   logfilename = fn;