// different initial value (CRC_ICLASS)
#include "iso14443crc.h"
#include "iso15693tools.h"
-
+#include "cipher.h"
+#include "protocols.h"
static int timeout = 4096;
else {
modulation = bit & Demod.syncBit;
modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
- //modulation = ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
Demod.samples += 4;
// 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 *readerToTagCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+ #define ICLASS_BUFFER_SIZE 32
+ uint8_t readerToTagCmd[ICLASS_BUFFER_SIZE];
// The response (tag -> reader) that we're receiving.
- uint8_t *tagToReaderResponse = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+ uint8_t tagToReaderResponse[ICLASS_BUFFER_SIZE];
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
- // reset traceLen to 0
- iso14a_set_tracing(TRUE);
- iso14a_clear_trace();
+ // free all BigBuf memory
+ BigBuf_free();
+ // The DMA buffer, used to stream samples from the FPGA
+ uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
+
+ set_tracing(TRUE);
+ clear_trace();
iso14a_set_trigger(FALSE);
- // The DMA buffer, used to stream samples from the FPGA
- int8_t *dmaBuf = ((int8_t *)BigBuf) + DMA_BUFFER_OFFSET;
- int lastRxCounter;
- int8_t *upTo;
+ int lastRxCounter;
+ uint8_t *upTo;
int smpl;
int maxBehindBy = 0;
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
uint32_t time_0 = GetCountSspClk();
-
+ uint32_t time_start = 0;
+ uint32_t time_stop = 0;
int div = 0;
//int div2 = 0;
(DMA_BUFFER_SIZE-1);
if(behindBy > maxBehindBy) {
maxBehindBy = behindBy;
- if(behindBy > 400) {
+ if(behindBy > (9 * DMA_BUFFER_SIZE / 10)) {
Dbprintf("blew circular buffer! behindBy=0x%x", behindBy);
goto done;
}
smpl = decbyter;
if(OutOfNDecoding((smpl & 0xF0) >> 4)) {
rsamples = samples - Uart.samples;
+ time_stop = (GetCountSspClk()-time_0) << 4;
LED_C_ON();
//if(!LogTrace(Uart.output,Uart.byteCnt, rsamples, Uart.parityBits,TRUE)) break;
if(tracing) {
uint8_t parity[MAX_PARITY_SIZE];
GetParity(Uart.output, Uart.byteCnt, parity);
- LogTrace(Uart.output,Uart.byteCnt, (GetCountSspClk()-time_0) << 4, (GetCountSspClk()-time_0) << 4, parity, TRUE);
+ LogTrace(Uart.output,Uart.byteCnt, time_start, time_stop, parity, TRUE);
}
Demod.state = DEMOD_UNSYNCD;
LED_B_OFF();
Uart.byteCnt = 0;
+ }else{
+ time_start = (GetCountSspClk()-time_0) << 4;
}
decbyter = 0;
}
if(div > 3) {
smpl = decbyte;
if(ManchesterDecoding(smpl & 0x0F)) {
- rsamples = samples - Demod.samples;
+ time_stop = (GetCountSspClk()-time_0) << 4;
+
+ rsamples = samples - Demod.samples;
LED_B_ON();
if(tracing) {
uint8_t parity[MAX_PARITY_SIZE];
GetParity(Demod.output, Demod.len, parity);
- LogTrace(Demod.output, Demod.len, (GetCountSspClk()-time_0) << 4, (GetCountSspClk()-time_0) << 4, parity, FALSE);
+ LogTrace(Demod.output, Demod.len, time_start, time_stop, parity, FALSE);
}
-
// And ready to receive another response.
memset(&Demod, 0, sizeof(Demod));
Demod.output = tagToReaderResponse;
Demod.state = DEMOD_UNSYNCD;
LED_C_OFF();
+ }else{
+ time_start = (GetCountSspClk()-time_0) << 4;
}
div = 0;
DbpString("COMMAND FINISHED");
Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
- Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
+ Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);
done:
AT91C_BASE_PDC_SSC->PDC_PTCR = AT91C_PDC_RXTDIS;
Dbprintf("%x %x %x", maxBehindBy, Uart.state, Uart.byteCnt);
- Dbprintf("%x %x %x", Uart.byteCntMax, traceLen, (int)Uart.output[0]);
+ Dbprintf("%x %x %x", Uart.byteCntMax, BigBuf_get_traceLen(), (int)Uart.output[0]);
LED_A_OFF();
LED_B_OFF();
LED_C_OFF();
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
- /*if(OutOfNDecoding((b & 0xf0) >> 4)) {
- *len = Uart.byteCnt;
- return TRUE;
- }*/
+
if(OutOfNDecoding(b & 0x0f)) {
*len = Uart.byteCnt;
return TRUE;
}
}
+static uint8_t encode4Bits(const uint8_t b)
+{
+ uint8_t c = b & 0xF;
+ // OTA, the least significant bits first
+ // The columns are
+ // 1 - Bit value to send
+ // 2 - Reversed (big-endian)
+ // 3 - Encoded
+ // 4 - Hex values
+
+ switch(c){
+ // 1 2 3 4
+ case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55
+ case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95
+ case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65
+ case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5
+ case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59
+ case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99
+ case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69
+ case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9
+ case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56
+ case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96
+ case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66
+ case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6
+ case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a
+ case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a
+ case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a
+ default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa
+
+ }
+}
//-----------------------------------------------------------------------------
// Prepare tag messages
//-----------------------------------------------------------------------------
static void CodeIClassTagAnswer(const uint8_t *cmd, int len)
{
- //So far a dummy implementation, not used
- //int lastProxToAirDuration =0;
+
+ /*
+ * SOF comprises 3 parts;
+ * * An unmodulated time of 56.64 us
+ * * 24 pulses of 423.75 KHz (fc/32)
+ * * A logic 1, which starts with an unmodulated time of 18.88us
+ * followed by 8 pulses of 423.75kHz (fc/32)
+ *
+ *
+ * EOF comprises 3 parts:
+ * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated
+ * time of 18.88us.
+ * - 24 pulses of fc/32
+ * - An unmodulated time of 56.64 us
+ *
+ *
+ * A logic 0 starts with 8 pulses of fc/32
+ * followed by an unmodulated time of 256/fc (~18,88us).
+ *
+ * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by
+ * 8 pulses of fc/32 (also 18.88us)
+ *
+ * The mode FPGA_HF_SIMULATOR_MODULATE_424K_8BIT which we use to simulate tag,
+ * works like this.
+ * - A 1-bit input to the FPGA becomes 8 pulses on 423.5kHz (fc/32) (18.88us).
+ * - A 0-bit inptu to the FPGA becomes an unmodulated time of 18.88us
+ *
+ * In this mode the SOF can be written as 00011101 = 0x1D
+ * The EOF can be written as 10111000 = 0xb8
+ * A logic 1 is 01
+ * A logic 0 is 10
+ *
+ * */
+
int i;
ToSendReset();
// Send SOF
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;//Proxtoair duration starts here
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
+ ToSend[++ToSendMax] = 0x1D;
for(i = 0; i < len; i++) {
- int j;
uint8_t b = cmd[i];
-
- // Data bits
- for(j = 0; j < 8; j++) {
- if(b & 1) {
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
- } else {
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- }
- b >>= 1;
- }
+ ToSend[++ToSendMax] = encode4Bits(b & 0xF); //Least significant half
+ ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF);//Most significant half
}
// Send EOF
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
-
+ ToSend[++ToSendMax] = 0xB8;
//lastProxToAirDuration = 8*ToSendMax - 3*8 - 3*8;//Not counting zeroes in the beginning or end
-
// Convert from last byte pos to length
ToSendMax++;
}
ToSendReset();
// Send SOF
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0xff;
- ToSend[++ToSendMax] = 0x00;
- ToSend[++ToSendMax] = 0xff;
-
+ ToSend[++ToSendMax] = 0x1D;
// lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
-
// Convert from last byte pos to length
ToSendMax++;
}
-int doIClassSimulation(uint8_t csn[], int breakAfterMacReceived, uint8_t *reader_mac_buf);
+#define MODE_SIM_CSN 0
+#define MODE_EXIT_AFTER_MAC 1
+#define MODE_FULLSIM 2
+
+int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf);
/**
* @brief SimulateIClass simulates an iClass card.
* @param arg0 type of simulation
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Enable and clear the trace
- iso14a_set_tracing(TRUE);
- iso14a_clear_trace();
+ set_tracing(TRUE);
+ clear_trace();
+ //Use the emulator memory for SIM
+ uint8_t *emulator = BigBuf_get_EM_addr();
- 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);
+ memcpy(emulator, datain, 8);
+ doIClassSimulation(MODE_SIM_CSN,NULL);
}else if(simType == 1)
{
- doIClassSimulation(csn_crc,0,NULL);
+ //Default CSN
+ uint8_t csn_crc[] = { 0x03, 0x1f, 0xec, 0x8a, 0xf7, 0xff, 0x12, 0xe0, 0x00, 0x00 };
+ // Use the CSN from commandline
+ memcpy(emulator, csn_crc, 8);
+ doIClassSimulation(MODE_SIM_CSN,NULL);
}
else if(simType == 2)
{
- uint8_t mac_responses[64] = { 0 };
+ uint8_t mac_responses[USB_CMD_DATA_SIZE] = { 0 };
Dbprintf("Going into attack mode, %d CSNS sent", numberOfCSNS);
// 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
{
// 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+i*8))
+ memcpy(emulator, datain+(i*8), 8);
+ if(doIClassSimulation(MODE_EXIT_AFTER_MAC,mac_responses+i*8))
{
+ cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
return; // Button pressed
}
}
cmd_send(CMD_ACK,CMD_SIMULATE_TAG_ICLASS,i,0,mac_responses,i*8);
+ }else if(simType == 3){
+ //This is 'full sim' mode, where we use the emulator storage for data.
+ doIClassSimulation(MODE_FULLSIM, NULL);
}
else{
// We may want a mode here where we hardcode the csns to use (from proxclone).
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)
+int doIClassSimulation( int simulationMode, uint8_t *reader_mac_buf)
{
+ // free eventually allocated BigBuf memory
+ BigBuf_free_keep_EM();
-
+ uint8_t *csn = BigBuf_get_EM_addr();
+ uint8_t *emulator = csn;
+ uint8_t sof_data[] = { 0x0F} ;
// CSN followed by two CRC bytes
- uint8_t response2[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
- uint8_t response3[] = { 0,0,0,0,0,0,0,0,0,0};
- memcpy(response3,csn,sizeof(response3));
+ uint8_t anticoll_data[10] = { 0 };
+ uint8_t csn_data[10] = { 0 };
+ memcpy(csn_data,csn,sizeof(csn_data));
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 };
// Construct anticollision-CSN
- rotateCSN(response3,response2);
+ rotateCSN(csn_data,anticoll_data);
// Compute CRC on both CSNs
- ComputeCrc14443(CRC_ICLASS, response2, 8, &response2[8], &response2[9]);
- ComputeCrc14443(CRC_ICLASS, response3, 8, &response3[8], &response3[9]);
+ ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]);
+ ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]);
+
+ // e-Purse
+ uint8_t card_challenge_data[8] = { 0x00 };
+ if(simulationMode == MODE_FULLSIM)
+ {
+ //Card challenge, a.k.a e-purse is on block 2
+ memcpy(card_challenge_data,emulator + (8 * 2) , 8);
+ }
int exitLoop = 0;
// Reader 0a
// Reader 81 anticoll. CSN
// Tag CSN
- uint8_t *resp;
- int respLen;
- uint8_t* respdata = NULL;
- int respsize = 0;
- uint8_t sof = 0x0f;
+ uint8_t *modulated_response;
+ int modulated_response_size;
+ uint8_t* trace_data = NULL;
+ int trace_data_size = 0;
+
- // Respond SOF -- takes 8 bytes
- uint8_t *resp1 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET);
- int resp1Len;
+ // Respond SOF -- takes 1 bytes
+ uint8_t *resp_sof = BigBuf_malloc(2);
+ int resp_sof_Len;
// Anticollision CSN (rotated CSN)
- // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
- uint8_t *resp2 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 10);
- int resp2Len;
+ // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+ uint8_t *resp_anticoll = BigBuf_malloc(28);
+ int resp_anticoll_len;
// CSN
- // 176: Takes 16 bytes for SOF/EOF and 10 * 16 = 160 bytes (2 bytes/bit)
- uint8_t *resp3 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 190);
- int resp3Len;
+ // 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
+ uint8_t *resp_csn = BigBuf_malloc(30);
+ int resp_csn_len;
// e-Purse
- // 144: Takes 16 bytes for SOF/EOF and 8 * 16 = 128 bytes (2 bytes/bit)
- uint8_t *resp4 = (((uint8_t *)BigBuf) + FREE_BUFFER_OFFSET + 370);
- int resp4Len;
+ // 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
+ uint8_t *resp_cc = BigBuf_malloc(20);
+ int resp_cc_len;
- // + 1720..
- uint8_t *receivedCmd = (((uint8_t *)BigBuf) + RECV_CMD_OFFSET);
+ uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
memset(receivedCmd, 0x44, MAX_FRAME_SIZE);
int len;
// First card answer: SOF
CodeIClassTagSOF();
- memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
+ memcpy(resp_sof, ToSend, ToSendMax); resp_sof_Len = ToSendMax;
// Anticollision CSN
- CodeIClassTagAnswer(response2, sizeof(response2));
- memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax;
+ CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data));
+ memcpy(resp_anticoll, ToSend, ToSendMax); resp_anticoll_len = ToSendMax;
// CSN
- CodeIClassTagAnswer(response3, sizeof(response3));
- memcpy(resp3, ToSend, ToSendMax); resp3Len = ToSendMax;
+ CodeIClassTagAnswer(csn_data, sizeof(csn_data));
+ memcpy(resp_csn, ToSend, ToSendMax); resp_csn_len = ToSendMax;
// e-Purse
- CodeIClassTagAnswer(response4, sizeof(response4));
- memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax;
+ CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data));
+ memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax;
+ //This is used for responding to READ-block commands
+ uint8_t *data_response = BigBuf_malloc(8 * 2 + 2);
// Start from off (no field generated)
//FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LED_A_ON();
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)) {
buttonPressed = true;
break;
LED_C_ON();
// Okay, look at the command now.
- if(receivedCmd[0] == 0x0a ) {
+ if(receivedCmd[0] == ICLASS_CMD_ACTALL ) {
// Reader in anticollission phase
- resp = resp1; respLen = resp1Len; //order = 1;
- respdata = &sof;
- respsize = sizeof(sof);
- } else if(receivedCmd[0] == 0x0c) {
+ modulated_response = resp_sof; modulated_response_size = resp_sof_Len; //order = 1;
+ trace_data = sof_data;
+ trace_data_size = sizeof(sof_data);
+ } else if(receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) {
// Reader asks for anticollission CSN
- resp = resp2; respLen = resp2Len; //order = 2;
- respdata = response2;
- respsize = sizeof(response2);
+ modulated_response = resp_anticoll; modulated_response_size = resp_anticoll_len; //order = 2;
+ trace_data = anticoll_data;
+ trace_data_size = sizeof(anticoll_data);
//DbpString("Reader requests anticollission CSN:");
- } else if(receivedCmd[0] == 0x81) {
+ } else if(receivedCmd[0] == ICLASS_CMD_SELECT) {
// Reader selects anticollission CSN.
// Tag sends the corresponding real CSN
- resp = resp3; respLen = resp3Len; //order = 3;
- respdata = response3;
- respsize = sizeof(response3);
+ modulated_response = resp_csn; modulated_response_size = resp_csn_len; //order = 3;
+ trace_data = csn_data;
+ trace_data_size = sizeof(csn_data);
//DbpString("Reader selects anticollission CSN:");
- } else if(receivedCmd[0] == 0x88) {
+ } else if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD) {
// Read e-purse (88 02)
- resp = resp4; respLen = resp4Len; //order = 4;
- respdata = response4;
- respsize = sizeof(response4);
+ modulated_response = resp_cc; modulated_response_size = resp_cc_len; //order = 4;
+ trace_data = card_challenge_data;
+ trace_data_size = sizeof(card_challenge_data);
LED_B_ON();
- } else if(receivedCmd[0] == 0x05) {
+ } else if(receivedCmd[0] == ICLASS_CMD_CHECK) {
// Reader random and reader MAC!!!
- // Do not respond
- // We do not know what to answer, so lets keep quiet
- resp = resp1; respLen = 0; //order = 5;
- respdata = NULL;
- respsize = 0;
- if (breakAfterMacReceived){
- // 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);
+ if(simulationMode == MODE_FULLSIM)
+ { //This is what we must do..
+ //Reader just sent us NR and MAC(k,cc * nr)
+ //The diversified key should be stored on block 3
+ //However, from a typical dump, the key will not be there
+ uint8_t *diversified_key = { 0 };
+ //Get the diversified key from emulator memory
+ memcpy(diversified_key, emulator+(8*3),8);
+ uint8_t ccnr[12] = { 0 };
+ //Put our cc there (block 2)
+ memcpy(ccnr, emulator + (8 * 2), 8);
+ //Put nr there
+ memcpy(ccnr+8, receivedCmd+1,4);
+ //Now, calc MAC
+ doMAC(ccnr,diversified_key, trace_data);
+ trace_data_size = 4;
+ CodeIClassTagAnswer(trace_data , trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ }else
+ { //Not fullsim, we don't respond
+ // We do not know what to answer, so lets keep quiet
+ modulated_response = resp_sof; modulated_response_size = 0;
+ trace_data = NULL;
+ trace_data_size = 0;
+ if (simulationMode == MODE_EXIT_AFTER_MAC){
+ // 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;
}
- exitLoop = true;
}
- } else if(receivedCmd[0] == 0x00 && len == 1) {
+
+ } else if(receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
// Reader ends the session
- resp = resp1; respLen = 0; //order = 0;
- respdata = NULL;
- respsize = 0;
- } else {
+ modulated_response = resp_sof; modulated_response_size = 0; //order = 0;
+ trace_data = NULL;
+ trace_data_size = 0;
+ } else if(simulationMode == MODE_FULLSIM && receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4){
+ //Read block
+ uint16_t blk = receivedCmd[1];
+ trace_data = emulator+(blk << 3);
+ trace_data_size = 8;
+ CodeIClassTagAnswer(trace_data , trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ }
+ 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",
receivedCmd[3], receivedCmd[4], receivedCmd[5],
receivedCmd[6], receivedCmd[7], receivedCmd[8]);
// Do not respond
- resp = resp1; respLen = 0; //order = 0;
- respdata = NULL;
- respsize = 0;
+ modulated_response = resp_sof; modulated_response_size = 0; //order = 0;
+ trace_data = NULL;
+ trace_data_size = 0;
}
if(cmdsRecvd > 100) {
else {
cmdsRecvd++;
}
-
- if(respLen > 0) {
- SendIClassAnswer(resp, respLen, 21);
+ /**
+ A legit tag has about 380us delay between reader EOT and tag SOF.
+ **/
+ if(modulated_response_size > 0) {
+ SendIClassAnswer(modulated_response, modulated_response_size, 1);
t2r_time = GetCountSspClk();
}
GetParity(receivedCmd, len, parity);
LogTrace(receivedCmd,len, (r2t_time-time_0)<< 4, (r2t_time-time_0) << 4, parity, TRUE);
- if (respdata != NULL) {
- GetParity(respdata, respsize, parity);
- LogTrace(respdata, respsize, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE);
+ if (trace_data != NULL) {
+ GetParity(trace_data, trace_data_size, parity);
+ LogTrace(trace_data, trace_data_size, (t2r_time-time_0) << 4, (t2r_time-time_0) << 4, parity, FALSE);
}
if(!tracing) {
DbpString("Trace full");
//Dbprintf("%x", cmdsRecvd);
LED_A_OFF();
LED_B_OFF();
+ LED_C_OFF();
+
if(buttonPressed)
{
DbpString("Button pressed");
int i = 0, d=0;//, u = 0, d = 0;
uint8_t b = 0;
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+ //FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR|FPGA_HF_SIMULATOR_MODULATE_424K_8BIT);
AT91C_BASE_SSC->SSC_THR = 0x00;
FpgaSetupSsc();
AT91C_BASE_SSC->SSC_THR = b;
}
- if (i > respLen +4) break;
+// if (i > respLen +4) break;
+ if (i > respLen +1) break;
}
return 0;
int samples = 0;
// This is tied to other size changes
- // uint8_t* frame_addr = ((uint8_t*)BigBuf) + 2024;
CodeIClassCommand(frame,len);
// Select the card
b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
skip = !skip;
if(skip) continue;
- /*if(ManchesterDecoding((b>>4) & 0xf)) {
- *samples = ((c - 1) << 3) + 4;
- return TRUE;
- }*/
+
if(ManchesterDecoding(b & 0x0f)) {
*samples = c << 3;
return TRUE;
{
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
// Reset trace buffer
- iso14a_set_tracing(TRUE);
- iso14a_clear_trace();
+ set_tracing(TRUE);
+ clear_trace();
// Setup SSC
FpgaSetupSsc();
static uint8_t identify[] = { 0x0c };
static uint8_t select[] = { 0x81, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
static uint8_t readcheck_cc[]= { 0x88, 0x02 };
- uint8_t *resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+ uint8_t resp[ICLASS_BUFFER_SIZE];
uint8_t read_status = 0;
int read_status= 0;
bool abort_after_read = arg0 & FLAG_ICLASS_READER_ONLY_ONCE;
bool get_cc = arg0 & FLAG_ICLASS_READER_GET_CC;
-
+ set_tracing(TRUE);
setupIclassReader();
size_t datasize = 0;
while(!BUTTON_PRESS())
{
- if(traceLen > TRACE_SIZE) {
+ if(!tracing) {
DbpString("Trace full");
break;
}
if(read_status == 1) datasize = 8;
if(read_status == 2) datasize = 16;
+ //Todo, read the public blocks 1,5 aswell:
+ //
+ // 0 : CSN (we already have)
+ // 1 : Configuration
+ // 2 : e-purse (we already have)
+ // (3,4 write-only)
+ // 5 Application issuer area
+ //
+ //Then we can 'ship' back the 8 * 5 bytes of data,
+ // with 0xFF:s in block 3 and 4.
+
LED_B_ON();
//Send back to client, but don't bother if we already sent this
if(memcmp(last_csn, card_data, 8) != 0)
void ReaderIClass_Replay(uint8_t arg0, uint8_t *MAC) {
- uint8_t card_data[24]={0};
+ uint8_t card_data[USB_CMD_DATA_SIZE]={0};
uint16_t block_crc_LUT[255] = {0};
{//Generate a lookup table for block crc
int keyaccess;
} memory;
- uint8_t* resp = (((uint8_t *)BigBuf) + RECV_RESP_OFFSET);
+ uint8_t resp[ICLASS_BUFFER_SIZE];
setupIclassReader();
-
+ set_tracing(TRUE);
while(!BUTTON_PRESS()) {
WDT_HIT();
- if(traceLen > TRACE_SIZE) {
+ if(!tracing) {
DbpString("Trace full");
break;
}
cardsize = memory.k16 ? 255 : 32;
WDT_HIT();
-
+ //Set card_data to all zeroes, we'll fill it with data
+ memset(card_data,0x0,USB_CMD_DATA_SIZE);
+ uint8_t failedRead =0;
+ uint32_t stored_data_length =0;
//then loop around remaining blocks
for(int block=0; block < cardsize; block++){
resp[3], resp[4], resp[5],
resp[6], resp[7]);
+ //Fill up the buffer
+ memcpy(card_data+stored_data_length,resp,8);
+ stored_data_length += 8;
+ if(stored_data_length +8 > USB_CMD_DATA_SIZE)
+ {//Time to send this off and start afresh
+ cmd_send(CMD_ACK,
+ stored_data_length,//data length
+ failedRead,//Failed blocks?
+ 0,//Not used ATM
+ card_data, stored_data_length);
+ //reset
+ stored_data_length = 0;
+ failedRead = 0;
+ }
+
}else{
+ failedRead = 1;
+ stored_data_length +=8;//Otherwise, data becomes misaligned
Dbprintf("Failed to dump block %d", block);
-
}
}
+
+ //Send off any remaining data
+ if(stored_data_length > 0)
+ {
+ cmd_send(CMD_ACK,
+ stored_data_length,//data length
+ failedRead,//Failed blocks?
+ 0,//Not used ATM
+ card_data, stored_data_length);
+ }
//If we got here, let's break
break;
}
+ //Signal end of transmission
+ cmd_send(CMD_ACK,
+ 0,//data length
+ 0,//Failed blocks?
+ 0,//Not used ATM
+ card_data, 0);
+
LED_A_OFF();
}
projects / proxmark3-svn / blobdiff