Added -R (redact) option to replace output with X's (#39)

* updated with blind redact data feature

* fixed redact code to make more sense.

* updated usage to add -R option for redact

* revert change to fix warning

* cleaned up formatting

* changed command line option to -R for redact

* fixed formatting

pocs/cpus/zenbleed/zenbleed.c

@@ -36,6 +36,7 @@ static uint64_t maxleak;
 
 static bool asciionly = true;
 static bool secretonly = false;
+static bool redact = false;
 
 // Minor variations in alignment seem to make the exploit work better on
 // different SKUs. These are some variants to try and see what works best.
@@ -101,10 +102,11 @@ static void * thread_leak_consumer(void *param)
 
             // Escape any confusing characters
             if (*s == '"' || *s == '\\')
-                fputc('\\', stdout);
+               if (!redact) fputc('\\', stdout);
             // Print normal ascii.
             if (isalnum(*s) || ispunct(*s)) {
-                fputc(*s, stdout);
+                if (!redact) fputc(*s, stdout); 
+                  else fputc('X',stdout);
             } else if (isspace(*s)) {
                 fputc(' ', stdout);
             } else {
@@ -232,6 +234,7 @@ static void print_help()
     logmsg("   -t N    Give up after this many seconds.");
     logmsg("   -n N    Set nice level, can improve results on some systems.");
     logmsg("   -a      Print all data, not just ASCII strings.");
+    logmsg("   -R      Redact output data with X's.");
     logmsg("   -s      Only print the magic hammer value (used for benchmarking).");
     logmsg("   -p STR  Pattern mode, try to continue string STR based on sampling leaked values.");
     logmsg("   -q      Quiet, reduce verbosity.");
@@ -258,7 +261,7 @@ int main(int argc, char **argv) {
     pattern   = 0;        // String to search for.
     cores     = 0;        // Which cpus to run on.
 
-    while ((opt = getopt(argc, argv, "r:qp:sat:n:hH:c:v:m:")) != -1) {
+    while ((opt = getopt(argc, argv, "r:qRp:sat:n:hH:c:v:m:")) != -1) {
         switch (opt) {
             case 'v': variant = atoi(optarg);
                       break;
@@ -280,6 +283,8 @@ int main(int argc, char **argv) {
                       break;
             case 'q': quiet = true;
                       break;
+            case 'R': redact = true;
+                      break;
             case 'r': cores = optarg;
                       break;
             default: