clean up unprintable characters in MFU dump output

diff --git a/client/cmdhfmfu.c b/client/cmdhfmfu.c
index 25a073d34440b2de98b3c56d67597dbc2df14111..9c5f7a833bd89636ac59e4aaa26e5bb8d64596a3 100644 (file)
--- a/client/cmdhfmfu.c
+++ b/client/cmdhfmfu.c
@@ -7,6 +7,7 @@
 //-----------------------------------------------------------------------------
 // High frequency MIFARE ULTRALIGHT (C) commands
 //-----------------------------------------------------------------------------
+#include <ctype.h>
 #include "loclass/des.h"
 #include "cmdhfmfu.h"
 #include "cmdhfmf.h"
@@ -1230,6 +1231,7 @@ int CmdHF14AMfUDump(const char *Cmd){
        bool manualPages = false;
        uint8_t startPage = 0;
        char tempStr[50];
+       char cleanASCII[4];
 
        while(param_getchar(Cmd, cmdp) != 0x00)
        {
@@ -1372,7 +1374,7 @@ int CmdHF14AMfUDump(const char *Cmd){
        PrintAndLog("---------------------------------");
        for (i = 0; i < Pages; ++i) {
                if ( i < 3 ) {
-                       PrintAndLog("%02d/0x%02X | %s|   | ", i+startPage, i+startPage, sprint_hex(data + i * 4, 4));
+                       PrintAndLog("%3d/0x%02X | %s|   | ", i+startPage, i+startPage, sprint_hex(data + i * 4, 4));
                        continue;
                }
                switch(i){
@@ -1419,7 +1421,17 @@ int CmdHF14AMfUDump(const char *Cmd){
                        case 43: tmplockbit = bit2[9]; break;  //auth1
                        default: break;
                }
-               PrintAndLog("%02d/0x%02X | %s| %d | %.4s", i+startPage, i+startPage, sprint_hex(data + i * 4, 4), tmplockbit, data+i*4);
+
+               // convert unprintable characters and line breaks to dots
+               memcpy(cleanASCII, data+i*4, 4);
+
+               for (size_t clean_i = 0; clean_i < 4; clean_i++) {
+                       if (!isprint(cleanASCII[clean_i])) {
+                               cleanASCII[clean_i] = '.';
+                       }
+               }
+
+               PrintAndLog("%3d/0x%02X | %s| %d | %.4s", i+startPage, i+startPage, sprint_hex(data + i * 4, 4), tmplockbit, cleanASCII);
        }
        PrintAndLog("---------------------------------");