#include "apps.h"
#include "util.h"
#include "string.h"
+#include "printf.h"
#include "common.h"
#include "cmd.h"
#include "iso14443a.h"
+#include "iso15693.h"
// Needed for CRC in emulation mode;
// same construction as in ISO 14443;
// different initial value (CRC_ICLASS)
static int timeout = 4096;
+// iCLASS has a slightly different timing compared to ISO15693. According to the picopass data sheet the tag response is expected 330us after
+// the reader command. This is measured from end of reader EOF to first modulation of the tag's SOF which starts with a 56,64us unmodulated period.
+// 330us = 140 ssp_clk cycles @ 423,75kHz when simulating.
+// 56,64us = 24 ssp_clk_cycles
+#define DELAY_ICLASS_VCD_TO_VICC_SIM 140
+#define TAG_SOF_UNMODULATED 24
+
//-----------------------------------------------------------------------------
// The software UART that receives commands from the reader, and its state
// variables.
Demod.shiftReg = 0;
Demod.samples = 0;
if (Demod.posCount) {
- //if (trigger) LED_A_OFF(); // Not useful in this case...
- switch(Demod.syncBit) {
+ switch (Demod.syncBit) {
case 0x08: Demod.samples = 3; break;
case 0x04: Demod.samples = 2; break;
case 0x02: Demod.samples = 1; break;
}
} else {
+ // state is DEMOD is in SYNC from here on.
modulation = bit & Demod.syncBit;
modulation |= ((bit << 1) ^ ((Demod.buffer & 0x08) >> 3)) & Demod.syncBit;
Demod.samples += 4;
- if (Demod.posCount==0) {
+ if (Demod.posCount == 0) {
Demod.posCount = 1;
if (modulation) {
Demod.sub = SUB_FIRST_HALF;
}
} else {
Demod.posCount = 0;
- /*(modulation && (Demod.sub == SUB_FIRST_HALF)) {
- if (Demod.state!=DEMOD_ERROR_WAIT) {
- Demod.state = DEMOD_ERROR_WAIT;
- Demod.output[Demod.len] = 0xaa;
- error = 0x01;
- }
- }*/
- //else if (modulation) {
if (modulation) {
if (Demod.sub == SUB_FIRST_HALF) {
Demod.sub = SUB_BOTH;
Demod.output[Demod.len] = 0x0f;
Demod.len++;
Demod.state = DEMOD_UNSYNCD;
-// error = 0x0f;
return true;
} else {
Demod.state = DEMOD_ERROR_WAIT;
error = 0x33;
}
- /*if (Demod.state!=DEMOD_ERROR_WAIT) {
- Demod.state = DEMOD_ERROR_WAIT;
- Demod.output[Demod.len] = 0xaa;
- error = 0x01;
- }*/
}
switch(Demod.state) {
case DEMOD_START_OF_COMMUNICATION:
if (Demod.sub == SUB_BOTH) {
- //Demod.state = DEMOD_MANCHESTER_D;
Demod.state = DEMOD_START_OF_COMMUNICATION2;
Demod.posCount = 1;
Demod.sub = SUB_NONE;
break;
case DEMOD_START_OF_COMMUNICATION3:
if (Demod.sub == SUB_SECOND_HALF) {
-// Demod.state = DEMOD_MANCHESTER_D;
Demod.state = DEMOD_SOF_COMPLETE;
- //Demod.output[Demod.len] = Demod.syncBit & 0xFF;
- //Demod.len++;
} else {
Demod.output[Demod.len] = 0xab;
Demod.state = DEMOD_ERROR_WAIT;
break;
}
- /*if (Demod.bitCount>=9) {
- Demod.output[Demod.len] = Demod.shiftReg & 0xff;
- Demod.len++;
-
- Demod.parityBits <<= 1;
- Demod.parityBits ^= ((Demod.shiftReg >> 8) & 0x01);
-
- Demod.bitCount = 0;
- Demod.shiftReg = 0;
- }*/
if (Demod.bitCount >= 8) {
Demod.shiftReg >>= 1;
Demod.output[Demod.len] = (Demod.shiftReg & 0xff);
}
}
-//-----------------------------------------------------------------------------
-// Wait for commands from reader
-// Stop when button is pressed
-// Or return true when command is captured
-//-----------------------------------------------------------------------------
-static int GetIClassCommandFromReader(uint8_t *received, int *len, int maxLen)
-{
- // Set FPGA mode to "simulated ISO 14443 tag", no modulation (listen
- // only, since we are receiving, not transmitting).
- // Signal field is off with the appropriate LED
- LED_D_OFF();
- FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
- // Now run a `software UART' on the stream of incoming samples.
- Uart.output = received;
- Uart.byteCntMax = maxLen;
- Uart.state = STATE_UNSYNCD;
-
- for (;;) {
- WDT_HIT();
-
- if (BUTTON_PRESS()) return false;
-
- if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
- AT91C_BASE_SSC->SSC_THR = 0x00;
- }
- if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
-
- 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) {
-
- /*
- * 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 input 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] = 0x1D;
-
- for (i = 0; i < len; i++) {
- uint8_t b = cmd[i];
- ToSend[++ToSendMax] = encode4Bits(b & 0xF); // Least significant half
- ToSend[++ToSendMax] = encode4Bits((b >>4) & 0xF); // Most significant half
- }
-
- // Send EOF
- 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++;
-}
-
-// Only SOF
+// Encode SOF only
static void CodeIClassTagSOF() {
- //So far a dummy implementation, not used
- //int lastProxToAirDuration =0;
-
ToSendReset();
- // Send SOF
ToSend[++ToSendMax] = 0x1D;
-// lastProxToAirDuration = 8*ToSendMax - 3*8;//Not counting zeroes in the beginning
-
- // Convert from last byte pos to length
ToSendMax++;
}
ComputeCrc14443(CRC_ICLASS, data, len, data+len, data+len+1);
}
-static int SendIClassAnswer(uint8_t *resp, int respLen, int delay) {
- 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_8BIT);
-
- AT91C_BASE_SSC->SSC_THR = 0x00;
- FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
- while (!BUTTON_PRESS()) {
- if ((AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)){
- b = AT91C_BASE_SSC->SSC_RHR; (void) b;
- }
- if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)){
- b = 0x00;
- if (d < delay) {
- d++;
- }
- else {
- if (i < respLen) {
- b = resp[i];
- //Hack
- //b = 0xAC;
- }
- i++;
- }
- AT91C_BASE_SSC->SSC_THR = b;
- }
-
-// if (i > respLen +4) break;
- if (i > respLen + 1) break;
- }
-
- return 0;
-}
-
-
-#define MODE_SIM_CSN 0
-#define MODE_EXIT_AFTER_MAC 1
-#define MODE_FULLSIM 2
/**
* @brief Does the actual simulation
- * @param csn - csn to use
- * @param breakAfterMacReceived if true, returns after reader MAC has been received.
*/
int doIClassSimulation(int simulationMode, uint8_t *reader_mac_buf) {
+
// free eventually allocated BigBuf memory
BigBuf_free_keep_EM();
- State cipher_state;
-// State cipher_state_reserve;
- uint8_t *csn = BigBuf_get_EM_addr();
- uint8_t *emulator = csn;
- uint8_t sof_data[] = { 0x0F} ;
+ uint16_t page_size = 32 * 8;
+ uint8_t current_page = 0;
+
+ // maintain cipher states for both credit and debit key for each page
+ State cipher_state_KC[8];
+ State cipher_state_KD[8];
+ State *cipher_state = &cipher_state_KD[0];
+
+ uint8_t *emulator = BigBuf_get_EM_addr();
+ uint8_t *csn = emulator;
+
// CSN followed by two CRC bytes
- uint8_t anticoll_data[10] = { 0 };
- uint8_t csn_data[10] = { 0 };
+ uint8_t anticoll_data[10];
+ uint8_t csn_data[10];
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]);
rotateCSN(csn_data, anticoll_data);
// Compute CRC on both CSNs
- ComputeCrc14443(CRC_ICLASS, anticoll_data, 8, &anticoll_data[8], &anticoll_data[9]);
- ComputeCrc14443(CRC_ICLASS, csn_data, 8, &csn_data[8], &csn_data[9]);
+ AppendCrc(anticoll_data, 8);
+ AppendCrc(csn_data, 8);
+
+ uint8_t diversified_key_d[8] = { 0x00 };
+ uint8_t diversified_key_c[8] = { 0x00 };
+ uint8_t *diversified_key = diversified_key_d;
+
+ // configuration block
+ uint8_t conf_block[10] = {0x12, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0xFF, 0x3C, 0x00, 0x00};
- uint8_t diversified_key[8] = { 0 };
// e-Purse
- uint8_t card_challenge_data[8] = { 0x00 };
- if (simulationMode == MODE_FULLSIM) {
- //The diversified key should be stored on block 3
- //Get the diversified key from emulator memory
- memcpy(diversified_key, emulator + (8*3), 8);
- //Card challenge, a.k.a e-purse is on block 2
- memcpy(card_challenge_data, emulator + (8 * 2), 8);
- //Precalculate the cipher state, feeding it the CC
- cipher_state = opt_doTagMAC_1(card_challenge_data, diversified_key);
+ uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ // initialize from page 0
+ memcpy(conf_block, emulator + 8 * 1, 8);
+ memcpy(card_challenge_data, emulator + 8 * 2, 8); // e-purse
+ memcpy(diversified_key_d, emulator + 8 * 3, 8); // Kd
+ memcpy(diversified_key_c, emulator + 8 * 4, 8); // Kc
+ }
+
+ AppendCrc(conf_block, 8);
+
+ // save card challenge for sim2,4 attack
+ if (reader_mac_buf != NULL) {
+ memcpy(reader_mac_buf, card_challenge_data, 8);
+ }
+
+ if (conf_block[5] & 0x80) {
+ page_size = 256 * 8;
+ }
+
+ // From PicoPass DS:
+ // When the page is in personalization mode this bit is equal to 1.
+ // Once the application issuer has personalized and coded its dedicated areas, this bit must be set to 0:
+ // the page is then "in application mode".
+ bool personalization_mode = conf_block[7] & 0x80;
+
+ // chip memory may be divided in 8 pages
+ uint8_t max_page = conf_block[4] & 0x10 ? 0 : 7;
+
+ // Precalculate the cipher states, feeding it the CC
+ cipher_state_KD[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ cipher_state_KC[0] = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ for (int i = 1; i < max_page; i++) {
+ uint8_t *epurse = emulator + i*page_size + 8*2;
+ uint8_t *Kd = emulator + i*page_size + 8*3;
+ uint8_t *Kc = emulator + i*page_size + 8*4;
+ cipher_state_KD[i] = opt_doTagMAC_1(epurse, Kd);
+ cipher_state_KC[i] = opt_doTagMAC_1(epurse, Kc);
+ }
}
int exitLoop = 0;
int trace_data_size = 0;
// Respond SOF -- takes 1 bytes
- uint8_t *resp_sof = BigBuf_malloc(2);
+ uint8_t *resp_sof = BigBuf_malloc(1);
int resp_sof_Len;
// Anticollision CSN (rotated CSN)
// 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
- uint8_t *resp_anticoll = BigBuf_malloc(28);
+ uint8_t *resp_anticoll = BigBuf_malloc(22);
int resp_anticoll_len;
- // CSN
+ // CSN (block 0)
// 22: Takes 2 bytes for SOF/EOF and 10 * 2 = 20 bytes (2 bytes/byte)
- uint8_t *resp_csn = BigBuf_malloc(30);
+ uint8_t *resp_csn = BigBuf_malloc(22);
int resp_csn_len;
- // e-Purse
+ // configuration (block 1) picopass 2ks
+ uint8_t *resp_conf = BigBuf_malloc(22);
+ int resp_conf_len;
+
+ // e-Purse (block 2)
// 18: Takes 2 bytes for SOF/EOF and 8 * 2 = 16 bytes (2 bytes/bit)
- uint8_t *resp_cc = BigBuf_malloc(20);
+ uint8_t *resp_cc = BigBuf_malloc(18);
int resp_cc_len;
+ // Kd, Kc (blocks 3 and 4). Cannot be read. Always respond with 0xff bytes only
+ uint8_t *resp_ff = BigBuf_malloc(22);
+ int resp_ff_len;
+ uint8_t ff_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
+ AppendCrc(ff_data, 8);
+
+ // Application Issuer Area (block 5)
+ uint8_t *resp_aia = BigBuf_malloc(22);
+ int resp_aia_len;
+ uint8_t aia_data[10] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00};
+ AppendCrc(aia_data, 8);
+
uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
int len;
// Prepare card messages
- ToSendMax = 0;
- // First card answer: SOF
+ // First card answer: SOF only
CodeIClassTagSOF();
memcpy(resp_sof, ToSend, ToSendMax);
resp_sof_Len = ToSendMax;
// Anticollision CSN
- CodeIClassTagAnswer(anticoll_data, sizeof(anticoll_data));
+ CodeIso15693AsTag(anticoll_data, sizeof(anticoll_data));
memcpy(resp_anticoll, ToSend, ToSendMax);
resp_anticoll_len = ToSendMax;
- // CSN
- CodeIClassTagAnswer(csn_data, sizeof(csn_data));
+ // CSN (block 0)
+ CodeIso15693AsTag(csn_data, sizeof(csn_data));
memcpy(resp_csn, ToSend, ToSendMax);
resp_csn_len = ToSendMax;
- // e-Purse
- CodeIClassTagAnswer(card_challenge_data, sizeof(card_challenge_data));
- memcpy(resp_cc, ToSend, ToSendMax); resp_cc_len = ToSendMax;
+ // Configuration (block 1)
+ CodeIso15693AsTag(conf_block, sizeof(conf_block));
+ memcpy(resp_conf, ToSend, ToSendMax);
+ resp_conf_len = ToSendMax;
- //This is used for responding to READ-block commands or other data which is dynamically generated
- //First the 'trace'-data, not encoded for FPGA
- uint8_t *data_generic_trace = BigBuf_malloc(8 + 2);//8 bytes data + 2byte CRC is max tag answer
- //Then storage for the modulated data
- //Each bit is doubled when modulated for FPGA, and we also have SOF and EOF (2 bytes)
- uint8_t *data_response = BigBuf_malloc( (8+2) * 2 + 2);
+ // e-Purse (block 2)
+ CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data));
+ memcpy(resp_cc, ToSend, ToSendMax);
+ resp_cc_len = ToSendMax;
- // Start from off (no field generated)
- //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(FPGA_MAJOR_MODE_HF_ISO14443A);
+ // Kd, Kc (blocks 3 and 4)
+ CodeIso15693AsTag(ff_data, sizeof(ff_data));
+ memcpy(resp_ff, ToSend, ToSendMax);
+ resp_ff_len = ToSendMax;
- // 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;
+ // Application Issuer Area (block 5)
+ CodeIso15693AsTag(aia_data, sizeof(aia_data));
+ memcpy(resp_aia, ToSend, ToSendMax);
+ resp_aia_len = ToSendMax;
+
+ //This is used for responding to READ-block commands or other data which is dynamically generated
+ uint8_t *data_generic_trace = BigBuf_malloc(32 + 2); // 32 bytes data + 2byte CRC is max tag answer
+ uint8_t *data_response = BigBuf_malloc( (32 + 2) * 2 + 2);
- LED_A_ON();
bool buttonPressed = false;
- uint8_t response_delay = 1;
+ enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE;
+
while (!exitLoop) {
- response_delay = 1;
- LED_B_OFF();
- //Signal tracer
- // Can be used to get a trigger for an oscilloscope..
- LED_C_OFF();
+ WDT_HIT();
- if (!GetIClassCommandFromReader(receivedCmd, &len, 100)) {
+ uint32_t reader_eof_time = 0;
+ len = GetIso15693CommandFromReader(receivedCmd, MAX_FRAME_SIZE, &reader_eof_time);
+ if (len < 0) {
buttonPressed = true;
break;
}
- r2t_time = GetCountSspClk();
- //Signal tracer
- LED_C_ON();
-
- // Okay, look at the command now.
- if (receivedCmd[0] == ICLASS_CMD_ACTALL) {
- // Reader in anticollission phase
- 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
- 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] == ICLASS_CMD_SELECT) {
- // Reader selects anticollission CSN.
+
+ // Now look at the reader command and provide appropriate responses
+ // default is no response:
+ modulated_response = NULL;
+ modulated_response_size = 0;
+ trace_data = NULL;
+ trace_data_size = 0;
+
+ if (receivedCmd[0] == ICLASS_CMD_ACTALL && len == 1) {
+ // Reader in anticollision phase
+ if (chip_state != HALTED) {
+ modulated_response = resp_sof;
+ modulated_response_size = resp_sof_Len;
+ chip_state = ACTIVATED;
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { // identify
+ // Reader asks for anticollision CSN
+ if (chip_state == SELECTED || chip_state == ACTIVATED) {
+ modulated_response = resp_anticoll;
+ modulated_response_size = resp_anticoll_len;
+ trace_data = anticoll_data;
+ trace_data_size = sizeof(anticoll_data);
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_SELECT && len == 9) {
+ // Reader selects anticollision CSN.
// Tag sends the corresponding real CSN
- 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] == ICLASS_CMD_READCHECK_KD) {
- // Read e-purse (88 02)
- 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] == ICLASS_CMD_CHECK) {
+ if (chip_state == ACTIVATED || chip_state == SELECTED) {
+ if (!memcmp(receivedCmd+1, anticoll_data, 8)) {
+ modulated_response = resp_csn;
+ modulated_response_size = resp_csn_len;
+ trace_data = csn_data;
+ trace_data_size = sizeof(csn_data);
+ chip_state = SELECTED;
+ } else {
+ chip_state = IDLE;
+ }
+ } else if (chip_state == HALTED) {
+ // RESELECT with CSN
+ if (!memcmp(receivedCmd+1, csn_data, 8)) {
+ modulated_response = resp_csn;
+ modulated_response_size = resp_csn_len;
+ trace_data = csn_data;
+ trace_data_size = sizeof(csn_data);
+ chip_state = SELECTED;
+ }
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 4) { // read block
+ uint16_t blockNo = receivedCmd[1];
+ if (chip_state == SELECTED) {
+ if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) {
+ // provide defaults for blocks 0 ... 5
+ switch (blockNo) {
+ case 0: // csn (block 00)
+ modulated_response = resp_csn;
+ modulated_response_size = resp_csn_len;
+ trace_data = csn_data;
+ trace_data_size = sizeof(csn_data);
+ break;
+ case 1: // configuration (block 01)
+ modulated_response = resp_conf;
+ modulated_response_size = resp_conf_len;
+ trace_data = conf_block;
+ trace_data_size = sizeof(conf_block);
+ break;
+ case 2: // e-purse (block 02)
+ modulated_response = resp_cc;
+ modulated_response_size = resp_cc_len;
+ trace_data = card_challenge_data;
+ trace_data_size = sizeof(card_challenge_data);
+ // set epurse of sim2,4 attack
+ if (reader_mac_buf != NULL) {
+ memcpy(reader_mac_buf, card_challenge_data, 8);
+ }
+ break;
+ case 3:
+ case 4: // Kd, Kc, always respond with 0xff bytes
+ modulated_response = resp_ff;
+ modulated_response_size = resp_ff_len;
+ trace_data = ff_data;
+ trace_data_size = sizeof(ff_data);
+ break;
+ case 5: // Application Issuer Area (block 05)
+ modulated_response = resp_aia;
+ modulated_response_size = resp_aia_len;
+ trace_data = aia_data;
+ trace_data_size = sizeof(aia_data);
+ break;
+ // default: don't respond
+ }
+ } else if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ if (blockNo == 3 || blockNo == 4) { // Kd, Kc, always respond with 0xff bytes
+ modulated_response = resp_ff;
+ modulated_response_size = resp_ff_len;
+ trace_data = ff_data;
+ trace_data_size = sizeof(ff_data);
+ } else { // use data from emulator memory
+ memcpy(data_generic_trace, emulator + current_page*page_size + 8*blockNo, 8);
+ AppendCrc(data_generic_trace, 8);
+ trace_data = data_generic_trace;
+ trace_data_size = 10;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ }
+ }
+ }
+
+ } else if ((receivedCmd[0] == ICLASS_CMD_READCHECK_KD
+ || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) && receivedCmd[1] == 0x02 && len == 2) {
+ // Read e-purse (88 02 || 18 02)
+ if (chip_state == SELECTED) {
+ if(receivedCmd[0] == ICLASS_CMD_READCHECK_KD){
+ cipher_state = &cipher_state_KD[current_page];
+ diversified_key = diversified_key_d;
+ } else {
+ cipher_state = &cipher_state_KC[current_page];
+ diversified_key = diversified_key_c;
+ }
+ modulated_response = resp_cc;
+ modulated_response_size = resp_cc_len;
+ trace_data = card_challenge_data;
+ trace_data_size = sizeof(card_challenge_data);
+ }
+
+ } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC
+ || receivedCmd[0] == ICLASS_CMD_CHECK_KD) && len == 9) {
// Reader random and reader MAC!!!
- if (simulationMode == MODE_FULLSIM) {
- //NR, from reader, is in receivedCmd +1
- opt_doTagMAC_2(cipher_state, receivedCmd+1, data_generic_trace, diversified_key);
+ if (chip_state == SELECTED) {
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ //NR, from reader, is in receivedCmd+1
+ opt_doTagMAC_2(*cipher_state, receivedCmd+1, data_generic_trace, diversified_key);
+ trace_data = data_generic_trace;
+ trace_data_size = 4;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ //exitLoop = true;
+ } else { // Not fullsim, we don't respond
+ // We do not know what to answer, so lets keep quiet
+ if (simulationMode == ICLASS_SIM_MODE_EXIT_AFTER_MAC) {
+ if (reader_mac_buf != NULL) {
+ // save NR and MAC for sim 2,4
+ memcpy(reader_mac_buf + 8, receivedCmd + 1, 8);
+ }
+ exitLoop = true;
+ }
+ }
+ }
+ } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
+ if (chip_state == SELECTED) {
+ // Reader ends the session
+ modulated_response = resp_sof;
+ modulated_response_size = resp_sof_Len;
+ chip_state = HALTED;
+ }
+
+ } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06
+ //Read 4 blocks
+ if (chip_state == SELECTED) {
+ uint8_t blockNo = receivedCmd[1];
+ memcpy(data_generic_trace, emulator + current_page*page_size + blockNo*8, 8 * 4);
+ AppendCrc(data_generic_trace, 8 * 4);
trace_data = data_generic_trace;
- trace_data_size = 4;
- CodeIClassTagAnswer(trace_data, trace_data_size);
+ trace_data_size = 8 * 4 + 2;
+ CodeIso15693AsTag(trace_data, trace_data_size);
memcpy(data_response, ToSend, ToSendMax);
modulated_response = data_response;
modulated_response_size = ToSendMax;
- response_delay = 0; //We need to hurry here... (but maybe not too much... ??)
- //exitLoop = true;
- } 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);
+ }
+
+ } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && (len == 12 || len == 14)) {
+ // We're expected to respond with the data+crc, exactly what's already in the receivedCmd
+ // receivedCmd is now UPDATE 1b | ADDRESS 1b | DATA 8b | Signature 4b or CRC 2b
+ if (chip_state == SELECTED) {
+ uint8_t blockNo = receivedCmd[1];
+ if (blockNo == 2) { // update e-purse
+ memcpy(card_challenge_data, receivedCmd+2, 8);
+ CodeIso15693AsTag(card_challenge_data, sizeof(card_challenge_data));
+ memcpy(resp_cc, ToSend, ToSendMax);
+ resp_cc_len = ToSendMax;
+ cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + current_page*page_size + 8*2, card_challenge_data, 8);
+ }
+ } else if (blockNo == 3) { // update Kd
+ for (int i = 0; i < 8; i++) {
+ if (personalization_mode) {
+ diversified_key_d[i] = receivedCmd[2 + i];
+ } else {
+ diversified_key_d[i] ^= receivedCmd[2 + i];
+ }
+ }
+ cipher_state_KD[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + current_page*page_size + 8*3, diversified_key_d, 8);
+ }
+ } else if (blockNo == 4) { // update Kc
+ for (int i = 0; i < 8; i++) {
+ if (personalization_mode) {
+ diversified_key_c[i] = receivedCmd[2 + i];
+ } else {
+ diversified_key_c[i] ^= receivedCmd[2 + i];
+ }
+ }
+ cipher_state_KC[current_page] = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + current_page*page_size + 8*4, diversified_key_c, 8);
}
- exitLoop = true;
+ } else if (simulationMode == ICLASS_SIM_MODE_FULL) { // update any other data block
+ memcpy(emulator + current_page*page_size + 8*blockNo, receivedCmd+2, 8);
}
+ memcpy(data_generic_trace, receivedCmd + 2, 8);
+ AppendCrc(data_generic_trace, 8);
+ trace_data = data_generic_trace;
+ trace_data_size = 10;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
}
- } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
- // Reader ends the session
- 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];
- //Take the data...
- memcpy(data_generic_trace, emulator + (blk << 3), 8);
- //Add crc
- AppendCrc(data_generic_trace, 8);
- trace_data = data_generic_trace;
- trace_data_size = 10;
- CodeIClassTagAnswer(trace_data, trace_data_size);
- memcpy(data_response, ToSend, ToSendMax);
- modulated_response = data_response;
- modulated_response_size = ToSendMax;
- } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && simulationMode == MODE_FULLSIM) {
- //Probably the reader wants to update the nonce. Let's just ignore that for now.
- // OBS! If this is implemented, don't forget to regenerate the cipher_state
- //We're expected to respond with the data+crc, exactly what's already in the receivedcmd
- //receivedcmd is now UPDATE 1b | ADDRESS 1b| DATA 8b| Signature 4b or CRC 2b|
-
- //Take the data...
- memcpy(data_generic_trace, receivedCmd+2, 8);
- //Add crc
- AppendCrc(data_generic_trace, 8);
- trace_data = data_generic_trace;
- trace_data_size = 10;
- CodeIClassTagAnswer(trace_data, trace_data_size);
- memcpy(data_response, ToSend, ToSendMax);
- modulated_response = data_response;
- modulated_response_size = ToSendMax;
- } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL) {
- //Pagesel
- //Pagesel enables to select a page in the selected chip memory and return its configuration block
- //Chips with a single page will not answer to this command
- // It appears we're fine ignoring this.
- //Otherwise, we should answer 8bytes (block) + 2bytes CRC
+ } else if (receivedCmd[0] == ICLASS_CMD_PAGESEL && len == 4) {
+ // Pagesel
+ // Chips with a single page will not answer to this command
+ // Otherwise, we should answer 8bytes (conf block 1) + 2bytes CRC
+ if (chip_state == SELECTED) {
+ if (simulationMode == ICLASS_SIM_MODE_FULL && max_page > 0) {
+ current_page = receivedCmd[1];
+ memcpy(data_generic_trace, emulator + current_page*page_size + 8*1, 8);
+ memcpy(diversified_key_d, emulator + current_page*page_size + 8*3, 8);
+ memcpy(diversified_key_c, emulator + current_page*page_size + 8*4, 8);
+ cipher_state = &cipher_state_KD[current_page];
+ personalization_mode = data_generic_trace[7] & 0x80;
+ AppendCrc(data_generic_trace, 8);
+ trace_data = data_generic_trace;
+ trace_data_size = 10;
+ CodeIso15693AsTag(trace_data, trace_data_size);
+ memcpy(data_response, ToSend, ToSendMax);
+ modulated_response = data_response;
+ modulated_response_size = ToSendMax;
+ }
+ }
+
+ } else if (receivedCmd[0] == 0x26 && len == 5) {
+ // standard ISO15693 INVENTORY command. Ignore.
+
} 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,
- receivedCmd[0], receivedCmd[1], receivedCmd[2],
- receivedCmd[3], receivedCmd[4], receivedCmd[5],
- receivedCmd[6], receivedCmd[7], receivedCmd[8]);
+ // don't know how to handle this command
+ char debug_message[250]; // should be enough
+ sprintf(debug_message, "Unhandled command (len = %d) received from reader:", len);
+ for (int i = 0; i < len && strlen(debug_message) < sizeof(debug_message) - 3 - 1; i++) {
+ sprintf(debug_message + strlen(debug_message), " %02x", receivedCmd[i]);
+ }
+ Dbprintf("%s", debug_message);
// Do not respond
- modulated_response = resp_sof;
- modulated_response_size = 0; //order = 0;
- trace_data = NULL;
- trace_data_size = 0;
}
- if (cmdsRecvd > 100) {
- //DbpString("100 commands later...");
- //break;
- } else {
- cmdsRecvd++;
- }
/**
- A legit tag has about 380us delay between reader EOT and tag SOF.
+ A legit tag has about 273,4us delay between reader EOT and tag SOF.
**/
if (modulated_response_size > 0) {
- SendIClassAnswer(modulated_response, modulated_response_size, response_delay);
- t2r_time = GetCountSspClk();
+ uint32_t response_time = reader_eof_time + DELAY_ICLASS_VCD_TO_VICC_SIM - TAG_SOF_UNMODULATED - DELAY_ARM_TO_READER_SIM;
+ TransmitTo15693Reader(modulated_response, modulated_response_size, &response_time, 0, false);
+ LogTrace(trace_data, trace_data_size, response_time + DELAY_ARM_TO_READER_SIM, response_time + (modulated_response_size << 6) + DELAY_ARM_TO_READER_SIM, NULL, false);
}
- uint8_t parity[MAX_PARITY_SIZE];
- GetParity(receivedCmd, len, parity);
- LogTrace(receivedCmd, len, (r2t_time-time_0) << 4, (r2t_time-time_0) << 4, parity, true);
-
- 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 (!get_tracing()) {
- DbpString("Trace full");
- //break;
- }
}
- //Dbprintf("%x", cmdsRecvd);
- LED_A_OFF();
- LED_B_OFF();
- LED_C_OFF();
-
if (buttonPressed)
{
DbpString("Button pressed");
* @param datain
*/
void SimulateIClass(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain) {
+
+ LED_A_ON();
+
uint32_t simType = arg0;
uint32_t numberOfCSNS = arg1;
+
+ // setup hardware for simulation:
FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
+ LED_D_OFF();
+ FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
+ StartCountSspClk();
// Enable and clear the trace
set_tracing(true);
//Use the emulator memory for SIM
uint8_t *emulator = BigBuf_get_EM_addr();
- if (simType == 0) {
+ if (simType == ICLASS_SIM_MODE_CSN) {
// Use the CSN from commandline
memcpy(emulator, datain, 8);
- doIClassSimulation(MODE_SIM_CSN,NULL);
- } else if (simType == 1) {
+ doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL);
+ } else if (simType == ICLASS_SIM_MODE_CSN_DEFAULT) {
//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) {
+ doIClassSimulation(ICLASS_SIM_MODE_CSN, NULL);
+ } else if (simType == ICLASS_SIM_MODE_READER_ATTACK) {
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
+ // in order to collect MAC's from the reader. This can later be used in an offline-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.
+ int i;
+ for (i = 0; i < numberOfCSNS && i*16+16 <= USB_CMD_DATA_SIZE; i++) {
+ // The usb data is 512 bytes, fitting 32 responses (8 byte CC + 4 Byte NR + 4 Byte MAC = 16 Byte response).
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
+ if (doIClassSimulation(ICLASS_SIM_MODE_EXIT_AFTER_MAC, mac_responses+i*16)) {
+ // Button pressed
+ break;
}
+ Dbprintf("CSN: %02x %02x %02x %02x %02x %02x %02x %02x",
+ datain[i*8+0], datain[i*8+1], datain[i*8+2], datain[i*8+3],
+ datain[i*8+4], datain[i*8+5], datain[i*8+6], datain[i*8+7]);
+ Dbprintf("NR,MAC: %02x %02x %02x %02x %02x %02x %02x %02x",
+ mac_responses[i*16+ 8], mac_responses[i*16+ 9], mac_responses[i*16+10], mac_responses[i*16+11],
+ mac_responses[i*16+12], mac_responses[i*16+13], mac_responses[i*16+14], mac_responses[i*16+15]);
+ SpinDelay(100); // give the reader some time to prepare for next CSN
}
- cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*8);
- } else if (simType == 3) {
+ cmd_send(CMD_ACK, CMD_SIMULATE_TAG_ICLASS, i, 0, mac_responses, i*16);
+ } else if (simType == ICLASS_SIM_MODE_FULL) {
//This is 'full sim' mode, where we use the emulator storage for data.
- doIClassSimulation(MODE_FULLSIM, NULL);
+ doIClassSimulation(ICLASS_SIM_MODE_FULL, NULL);
} 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...");
+ LED_A_OFF();
}
if (elapsed) (*elapsed)++;
}
if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
- if (c < timeout) {
- c++;
- } else {
- return false;
+ if (c < timeout) {
+ c++;
+ } else {
+ return false;
}
b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
skip = !skip;
ReaderTransmitIClass(act_all, 1);
// Card present?
if (!ReaderReceiveIClass(resp)) return read_status;//Fail
+
//Send Identify
ReaderTransmitIClass(identify, 1);
//We expect a 10-byte response here, 8 byte anticollision-CSN and 2 byte CRC
// 0 : CSN
// 1 : Configuration
// 2 : e-purse
- // (3,4 write-only, kc and kd)
- // 5 Application issuer area
- //
- //Then we can 'ship' back the 8 * 6 bytes of data,
+ // 3 : kd / debit / aa2 (write-only)
+ // 4 : kc / credit / aa1 (write-only)
+ // 5 : AIA, Application issuer area
+ //Then we can 'ship' back the 6 * 8 bytes of data,
// with 0xFF:s in block 3 and 4.
LED_B_ON();
}
void iClass_Authentication(uint8_t *MAC) {
- uint8_t check[] = { ICLASS_CMD_CHECK, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+ uint8_t check[] = { ICLASS_CMD_CHECK_KD, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
uint8_t resp[ICLASS_BUFFER_SIZE];
memcpy(check+5, MAC, 4);
bool isOK;
projects / proxmark3-svn / blobdiff