mirror of
https://github.com/RfidResearchGroup/proxmark3.git
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118 lines
3.5 KiB
C
118 lines
3.5 KiB
C
/*
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* `hf_14bsniff` passively sniffs ISO14b frames.
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* *
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* On entering stand-alone mode, this module will start sniffing ISO14b frames.
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* This will be stored in the normal trace buffer (ie: in RAM -- will be lost
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* at power-off).
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*
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* Short-pressing the button again will stop sniffing and standalone mode will
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* exit.
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*
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* LEDs:
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* - LED1: sniffing
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* - LED2: sniffed tag command, turns off when finished sniffing reader command
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* - LED3: sniffed reader command, turns off when finished sniffing tag command
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* - LED4: unmounting/sync'ing flash (normally < 100ms)
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*
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* To retrieve trace data from flash:
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*
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* 1. mem spiffs dump -s hf_14bsniff.trace -d hf_14bsniff.trace
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* Copies trace data file from flash to your PC.
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*
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* 2. trace load -f hf_14bsniff.trace
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* Loads trace data from a file into PC-side buffers.
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*
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* 3. For ISO14a: trace list -t 14b -1
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*
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* Lists trace data from buffer without requesting it from PM3.
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*
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* This module emits debug strings during normal operation -- so try it out in
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* the lab connected to PM3 client before taking it into the field.
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*
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* To delete the trace data from flash:
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* mem spiffs remove -f hf_14bsniff.trace
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*
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* Caveats / notes:
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* - Trace buffer will be cleared on starting stand-alone mode.
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* - This module will terminate if the trace buffer is full.
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* - Like normal sniffing mode, timestamps overflow after 5 min 16 sec.
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* However, the trace buffer is sequential, so will be in the correct order.
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*/
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#include "standalone.h" // standalone definitions
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#include "proxmark3_arm.h"
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#include "iso14443b.h"
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#include "util.h"
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#include "spiffs.h"
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#include "appmain.h"
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#include "dbprint.h"
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#include "ticks.h"
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#include "BigBuf.h"
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#define HF_14BSNIFF_LOGFILE "hf_14bsniff.trace"
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static void DownloadTraceInstructions(void) {
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Dbprintf("");
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Dbprintf("To get the trace from flash and display it:");
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Dbprintf("1. mem spiffs dump -s "HF_14BSNIFF_LOGFILE" -d hf_14bsniff.trace");
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Dbprintf("2. trace load -f hf_14bsniff.trace");
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Dbprintf("3. trace list -t 14b -1");
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}
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void ModInfo(void) {
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DbpString(" HF 14B SNIFF, a ISO14443b sniffer");
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DownloadTraceInstructions();
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}
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void RunMod(void) {
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StandAloneMode();
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Dbprintf(_YELLOW_("HF 14B SNIFF started"));
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#ifdef WITH_FLASH
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rdv40_spiffs_lazy_mount();
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#endif
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SniffIso14443b();
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Dbprintf("Stopped sniffing");
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SpinDelay(200);
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uint32_t trace_len = BigBuf_get_traceLen();
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#ifndef WITH_FLASH
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// Keep stuff in BigBuf for USB/BT dumping
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if (trace_len > 0)
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Dbprintf("[!] Trace length (bytes) = %u", trace_len);
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#else
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// Write stuff to spiffs logfile
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if (trace_len > 0) {
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Dbprintf("[!] Trace length (bytes) = %u", trace_len);
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uint8_t *trace_buffer = BigBuf_get_addr();
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if (!exists_in_spiffs(HF_14BSNIFF_LOGFILE)) {
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rdv40_spiffs_write(
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HF_14BSNIFF_LOGFILE, trace_buffer, trace_len, RDV40_SPIFFS_SAFETY_SAFE);
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Dbprintf("[!] Wrote trace to "HF_14BSNIFF_LOGFILE);
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} else {
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rdv40_spiffs_append(
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HF_14BSNIFF_LOGFILE, trace_buffer, trace_len, RDV40_SPIFFS_SAFETY_SAFE);
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Dbprintf("[!] Appended trace to "HF_14BSNIFF_LOGFILE);
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}
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} else {
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Dbprintf("[!] Trace buffer is empty, nothing to write!");
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}
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LED_D_ON();
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rdv40_spiffs_lazy_unmount();
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LED_D_OFF();
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SpinErr(LED_A, 200, 5);
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SpinDelay(100);
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#endif
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Dbprintf("-=[ exit ]=-");
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LEDsoff();
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#ifdef WITH_FLASH
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DownloadTraceInstructions();
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#endif
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}
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