/**
* @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_KC;
+ State cipher_state_KD;
uint8_t *emulator = BigBuf_get_EM_addr();
uint8_t *csn = emulator;
AppendCrc(anticoll_data, 8);
AppendCrc(csn_data, 8);
- uint8_t diversified_key[8] = { 0 };
+ uint8_t diversified_key_d[8] = { 0 };
+ uint8_t diversified_key_c[8] = { 0 };
// e-Purse
uint8_t card_challenge_data[8] = { 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
//uint8_t card_challenge_data[8] = { 0 };
if (simulationMode == ICLASS_SIM_MODE_FULL) {
- // The diversified key should be stored on block 3
- // Get the diversified key from emulator memory
- memcpy(diversified_key, emulator + (8 * 3), 8);
+ // Get the diversified keys from emulator memory
+ memcpy(diversified_key_d, emulator + (8 * 3), 8);
+ memcpy(diversified_key_c, emulator + (8 * 4), 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);
+ // Precalculate the cipher states, feeding it the CC
+ cipher_state_KD = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
}
// save card challenge for sim2,4 attack
if (reader_mac_buf != NULL) {
LED_A_ON();
bool buttonPressed = false;
+ enum { IDLE, ACTIVATED, SELECTED, HALTED } chip_state = IDLE;
+
while (!exitLoop) {
WDT_HIT();
LED_B_OFF();
trace_data = NULL;
trace_data_size = 0;
- if (receivedCmd[0] == ICLASS_CMD_ACTALL) {
- // Reader in anticollission phase
- modulated_response = resp_sof;
- modulated_response_size = resp_sof_Len;
- trace_data = sof_data;
- trace_data_size = sizeof(sof_data);
+ 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;
+ trace_data = sof_data;
+ trace_data_size = sizeof(sof_data);
+ chip_state = ACTIVATED;
+ }
} else if (receivedCmd[0] == ICLASS_CMD_READ_OR_IDENTIFY && len == 1) { // identify
- // Reader asks for anticollission CSN
- modulated_response = resp_anticoll;
- modulated_response_size = resp_anticoll_len;
- trace_data = anticoll_data;
- trace_data_size = sizeof(anticoll_data);
+ // 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
+ 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 (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_data;
- trace_data_size = sizeof(conf_data);
- 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, Kd, always respond with 0xff bytes
+ 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_data;
+ trace_data_size = sizeof(conf_data);
+ 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);
- 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 { // use data from emulator memory
+ memcpy(data_generic_trace, emulator + 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 (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 + (receivedCmd[1] << 3), 8);
- AppendCrc(data_generic_trace, 8);
+ }
+
+ } 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) {
+ modulated_response = resp_cc;
+ modulated_response_size = resp_cc_len;
+ trace_data = card_challenge_data;
+ trace_data_size = sizeof(card_challenge_data);
+ LED_B_ON();
+ }
+
+ } else if ((receivedCmd[0] == ICLASS_CMD_CHECK_KC
+ || receivedCmd[0] == ICLASS_CMD_CHECK_KD) && len == 9) {
+ // Reader random and reader MAC!!!
+ if (chip_state == SELECTED) {
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ //NR, from reader, is in receivedCmd+1
+ if (receivedCmd[0] == ICLASS_CMD_CHECK_KC) {
+ opt_doTagMAC_2(cipher_state_KC, receivedCmd+1, data_generic_trace, diversified_key_c);
+ } else {
+ opt_doTagMAC_2(cipher_state_KD, receivedCmd+1, data_generic_trace, diversified_key_d);
+ }
trace_data = data_generic_trace;
- trace_data_size = 10;
+ 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_SELECT) {
- // Reader selects anticollission CSN.
- // Tag sends the corresponding real CSN
- modulated_response = resp_csn;
- modulated_response_size = resp_csn_len;
- trace_data = csn_data;
- trace_data_size = sizeof(csn_data);
-
- } else if (receivedCmd[0] == ICLASS_CMD_READCHECK_KD
- || receivedCmd[0] == ICLASS_CMD_READCHECK_KC) {
- // Read e-purse (88 02 || 18 02)
- modulated_response = resp_cc;
- modulated_response_size = resp_cc_len;
- trace_data = card_challenge_data;
- trace_data_size = sizeof(card_challenge_data);
- LED_B_ON();
+ } else if (receivedCmd[0] == ICLASS_CMD_HALT && len == 1) {
+ if (chip_state == SELECTED) {
+ // Reader ends the session
+ chip_state = HALTED;
+ }
- } else if (receivedCmd[0] == ICLASS_CMD_CHECK) {
- // Reader random and reader MAC!!!
- 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);
+ } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06
+ //Read 4 blocks
+ if (chip_state == SELECTED) {
+ memcpy(data_generic_trace, emulator + receivedCmd[1]*8, 8 * 4);
+ AppendCrc(data_generic_trace, 8 * 4);
trace_data = data_generic_trace;
- trace_data_size = 4;
+ 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;
- //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) {
- // Reader ends the session
- modulated_response = resp_sof;
- modulated_response_size = 0;
- trace_data = NULL;
- trace_data_size = 0;
-
- } else if (simulationMode == ICLASS_SIM_MODE_FULL && receivedCmd[0] == ICLASS_CMD_READ4 && len == 4) { // 0x06
- //Read block
- //Take the data...
- memcpy(data_generic_trace, emulator + (receivedCmd[1] << 3), 8 * 4);
- AppendCrc(data_generic_trace, 8 * 4);
- trace_data = data_generic_trace;
- 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;
-
- } else if (receivedCmd[0] == ICLASS_CMD_UPDATE && simulationMode == ICLASS_SIM_MODE_FULL) {
- // 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
+ } 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
- 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_PAGESEL) {
+ 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 = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + 8*2, card_challenge_data, 8);
+ }
+ } else if (blockNo == 3) { // update Kd
+ for (int i = 0; i < 8; i++){
+ diversified_key_d[i] = diversified_key_d[i] ^ receivedCmd[2 + i];
+ }
+ cipher_state_KD = opt_doTagMAC_1(card_challenge_data, diversified_key_d);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + 8*3, diversified_key_d, 8);
+ }
+ } else if (blockNo == 4) { // update Kc
+ for(int i = 0; i < 8; i++){
+ diversified_key_c[i] = diversified_key_c[i] ^ receivedCmd[2 + i];
+ }
+ cipher_state_KC = opt_doTagMAC_1(card_challenge_data, diversified_key_c);
+ if (simulationMode == ICLASS_SIM_MODE_FULL) {
+ memcpy(emulator + 8*4, diversified_key_c, 8);
+ }
+ } else if (simulationMode == ICLASS_SIM_MODE_FULL) { // update any other data block
+ memcpy(emulator + 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_PAGESEL && len == 4) {
// 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
+ if (chip_state == SELECTED) {
+ // 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] == 0x26 && len == 5) {
+ // standard ISO15693 INVENTORY command. Ignore.
} else {
- // Never seen this command before
+ // 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++) {
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",
- datain[i*8+ 8], datain[i*8+ 9], datain[i*8+10], datain[i*8+11],
- datain[i*8+12], datain[i*8+13], datain[i*8+14], datain[i*8+15]);
+ 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*16);
} else if (simType == ICLASS_SIM_MODE_FULL) {
}
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