static int tracing = TRUE;
static uint32_t iso14a_timeout;
-// CARD TO READER
+// CARD TO READER - manchester
// 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
+// READER TO CARD - miller
// Sequence X: 00001100 drop after half a period
// Sequence Y: 00000000 no drop
// Sequence Z: 11000000 drop at start
1, 0, 0, 1, 0, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1
};
-// BIG CHANGE - UNDERSTAND THIS BEFORE WE COMMIT
-#define RECV_CMD_OFFSET 3032
-#define RECV_RES_OFFSET 3096
-#define DMA_BUFFER_OFFSET 3160
-#define DMA_BUFFER_SIZE 4096
-#define TRACE_LENGTH 3000
-
uint8_t trigger = 0;
void iso14a_set_trigger(int enable) {
trigger = enable;
//-----------------------------------------------------------------------------
// Prepare tag messages
//-----------------------------------------------------------------------------
-static void CodeIso14443aAsTag(const uint8_t *cmd, int len)
+static void CodeIso14443aAsTagPar(const uint8_t *cmd, int len, uint32_t dwParity)
{
- int i;
- int oddparity;
+ int i;
+// int oddparity;
- ToSendReset();
+ ToSendReset();
// Correction bit, might be removed when not needed
ToSendStuffBit(0);
ToSendStuffBit(0);
ToSendStuffBit(0);
ToSendStuffBit(0);
-
+
// Send startbit
ToSend[++ToSendMax] = SEC_D;
- for(i = 0; i < len; i++) {
- int j;
- uint8_t b = cmd[i];
+ for(i = 0; i < len; i++) {
+ int j;
+ uint8_t b = cmd[i];
// Data bits
- oddparity = 0x01;
+// oddparity = 0x01;
for(j = 0; j < 8; j++) {
- oddparity ^= (b & 1);
+// oddparity ^= (b & 1);
if(b & 1) {
ToSend[++ToSendMax] = SEC_D;
} else {
ToSend[++ToSendMax] = SEC_E;
- }
- b >>= 1;
- }
+ }
+ b >>= 1;
+ }
- // Parity bit
- if(oddparity) {
- ToSend[++ToSendMax] = SEC_D;
+ // Get the parity bit
+ if ((dwParity >> i) & 0x01) {
+ ToSend[++ToSendMax] = SEC_D;
} else {
ToSend[++ToSendMax] = SEC_E;
}
- }
+
+ // Parity bit
+// if(oddparity) {
+// ToSend[++ToSendMax] = SEC_D;
+// } else {
+// ToSend[++ToSendMax] = SEC_E;
+// }
+
+// if (oddparity != ((dwParity >> i) & 0x01))
+// Dbprintf("par error. i=%d", i);
+ }
- // Send stopbit
- ToSend[++ToSendMax] = SEC_F;
+ // Send stopbit
+ ToSend[++ToSendMax] = SEC_F;
// Flush the buffer in FPGA!!
for(i = 0; i < 5; i++) {
ToSend[++ToSendMax] = SEC_F;
}
- // Convert from last byte pos to length
- ToSendMax++;
+ // Convert from last byte pos to length
+ ToSendMax++;
// Add a few more for slop
- ToSend[ToSendMax++] = 0x00;
- ToSend[ToSendMax++] = 0x00;
- //ToSendMax += 2;
+// ToSend[ToSendMax++] = 0x00;
+// ToSend[ToSendMax++] = 0x00;
+}
+
+static void CodeIso14443aAsTag(const uint8_t *cmd, int len){
+ CodeIso14443aAsTagPar(cmd, len, GetParity(cmd, len));
}
//-----------------------------------------------------------------------------
// This is to send a NACK kind of answer, its only 3 bits, I know it should be 4
//-----------------------------------------------------------------------------
-static void CodeStrangeAnswer()
+static void CodeStrangeAnswerAsTag()
{
int i;
// Convert from last byte pos to length
ToSendMax++;
+}
- // Add a few more for slop
- ToSend[ToSendMax++] = 0x00;
- ToSend[ToSendMax++] = 0x00;
- //ToSendMax += 2;
+static void Code4bitAnswerAsTag(uint8_t cmd)
+{
+ int i;
+
+ ToSendReset();
+
+ // Correction bit, might be removed when not needed
+ ToSendStuffBit(0);
+ ToSendStuffBit(0);
+ ToSendStuffBit(0);
+ ToSendStuffBit(0);
+ ToSendStuffBit(1); // 1
+ ToSendStuffBit(0);
+ ToSendStuffBit(0);
+ ToSendStuffBit(0);
+
+ // Send startbit
+ ToSend[++ToSendMax] = SEC_D;
+
+ uint8_t b = cmd;
+ for(i = 0; i < 4; i++) {
+ if(b & 1) {
+ ToSend[++ToSendMax] = SEC_D;
+ } else {
+ ToSend[++ToSendMax] = SEC_E;
+ }
+ b >>= 1;
+ }
+
+ // Send stopbit
+ ToSend[++ToSendMax] = SEC_F;
+
+ // Flush the buffer in FPGA!!
+ for(i = 0; i < 5; i++) {
+ ToSend[++ToSendMax] = SEC_F;
+ }
+
+ // Convert from last byte pos to length
+ ToSendMax++;
}
//-----------------------------------------------------------------------------
memcpy(resp3a, ToSend, ToSendMax); resp3aLen = ToSendMax;
// Strange answer is an example of rare message size (3 bits)
- CodeStrangeAnswer();
+ CodeStrangeAnswerAsTag();
memcpy(resp4, ToSend, ToSendMax); resp4Len = ToSendMax;
// Authentication answer (random nonce)
volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
if(MillerDecoding((b & 0xf0) >> 4)) {
*len = Uart.byteCnt;
+ if (tracing) LogTrace(received, *len, GetDeltaCountUS(), Uart.parityBits, TRUE);
return 0;
}
if(MillerDecoding(b & 0x0f)) {
*len = Uart.byteCnt;
+ if (tracing) LogTrace(received, *len, GetDeltaCountUS(), Uart.parityBits, TRUE);
return 0;
}
}
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
if(i > respLen) {
- b = 0x00;
+ b = 0xff; // was 0x00
u++;
} else {
b = resp[i];
return 0;
}
-static int EmSendCmdEx(uint8_t *resp, int respLen, int correctionNeeded){
- CodeIso14443aAsTag(resp, respLen);
- return EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
+int EmSend4bitEx(uint8_t resp, int correctionNeeded){
+ Code4bitAnswerAsTag(resp);
+ int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
+ if (tracing) LogTrace(&resp, 1, GetDeltaCountUS(), GetParity(&resp, 1), FALSE);
+ return res;
+}
+
+int EmSend4bit(uint8_t resp){
+ return EmSend4bitEx(resp, 0);
+}
+
+int EmSendCmdExPar(uint8_t *resp, int respLen, int correctionNeeded, uint32_t par){
+ CodeIso14443aAsTagPar(resp, respLen, par);
+ int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
+ if (tracing) LogTrace(resp, respLen, GetDeltaCountUS(), par, FALSE);
+ return res;
+}
+
+int EmSendCmdEx(uint8_t *resp, int respLen, int correctionNeeded){
+ return EmSendCmdExPar(resp, respLen, correctionNeeded, GetParity(resp, respLen));
}
-static int EmSendCmd(uint8_t *resp, int respLen){
- return EmSendCmdEx(resp, respLen, 0);
+int EmSendCmd(uint8_t *resp, int respLen){
+ return EmSendCmdExPar(resp, respLen, 0, GetParity(resp, respLen));
+}
+
+int EmSendCmdPar(uint8_t *resp, int respLen, uint32_t par){
+ return EmSendCmdExPar(resp, respLen, 0, par);
}
//-----------------------------------------------------------------------------
if (MF_DBGLEVEL >= 2) DbpString("READ BLOCK FINISHED");
// add trace trailer
- uid[0] = 0xff;
- uid[1] = 0xff;
- uid[2] = 0xff;
- uid[3] = 0xff;
+ memset(uid, 0x44, 4);
LogTrace(uid, 4, 0, 0, TRUE);
UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
if (MF_DBGLEVEL >= 2) DbpString("READ SECTOR FINISHED");
// add trace trailer
- uid[0] = 0xff;
- uid[1] = 0xff;
- uid[2] = 0xff;
- uid[3] = 0xff;
+ memset(uid, 0x44, 4);
LogTrace(uid, 4, 0, 0, TRUE);
UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
if (MF_DBGLEVEL >= 2) DbpString("WRITE BLOCK FINISHED");
// add trace trailer
- uid[0] = 0xff;
- uid[1] = 0xff;
- uid[2] = 0xff;
- uid[3] = 0xff;
+ memset(uid, 0x44, 4);
LogTrace(uid, 4, 0, 0, TRUE);
UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
crypto1_destroy(pcs);
// add trace trailer
- uid[0] = 0xff;
- uid[1] = 0xff;
- uid[2] = 0xff;
- uid[3] = 0xff;
+ memset(uid, 0x44, 4);
LogTrace(uid, 4, 0, 0, TRUE);
for (i = 0; i < NES_MAX_INFO; i++) {
crypto1_destroy(pcs);
// add trace trailer
- uid[0] = 0xff;
- uid[1] = 0xff;
- uid[2] = 0xff;
- uid[3] = 0xff;
+ memset(uid, 0x44, 4);
LogTrace(uid, 4, 0, 0, TRUE);
UsbCommand ack = {CMD_ACK, {isOK, 0, 0}};
{
int cardSTATE = MFEMUL_NOFIELD;
int vHf = 0; // in mV
+ int nextCycleTimeout = 0;
int res;
uint32_t timer = 0;
+ uint32_t selTimer = 0;
+ uint32_t authTimer = 0;
+ uint32_t par = 0;
int len = 0;
+ uint8_t cardWRBL = 0;
uint8_t cardAUTHSC = 0;
uint8_t cardAUTHKEY = 0xff; // no authentication
uint32_t cuid = 0;
uint64_t key64 = 0xffffffffffffULL;
- uint8_t* receivedCmd = mifare_get_bigbufptr();
+ uint8_t* receivedCmd = eml_get_bigbufptr_recbuf();
+ uint8_t *response = eml_get_bigbufptr_sendbuf();
static uint8_t rATQA[] = {0x04, 0x00}; // Mifare classic 1k
- static uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
- static uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
+ static uint8_t rUIDBCC1[] = {0xde, 0xad, 0xbe, 0xaf, 0x62};
+ static uint8_t rUIDBCC2[] = {0xde, 0xad, 0xbe, 0xaf, 0x62}; // !!!
- static uint8_t rSAK[] = {0x08, 0xb6, 0xdd};
+ static uint8_t rSAK[] = {0x08, 0xb6, 0xdd};
- static uint8_t rAUTH_NT[] = {0x01, 0x02, 0x03, 0x04};
+ static uint8_t rAUTH_NT[] = {0x1a, 0xac, 0xff, 0x4f};
+ static uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
+
+ // clear trace
+ traceLen = 0;
+ tracing = true;
+
+ // emulator memory
+ emlClearMem();
+ emlGetMemBt(rUIDBCC1, 0, 4);
+ rUIDBCC1[4] = rUIDBCC1[0] ^ rUIDBCC1[1] ^ rUIDBCC1[2] ^ rUIDBCC1[3];
// -------------------------------------- test area
-
+ // Authenticate response - nonce
+ uint8_t *resp1 = (((uint8_t *)BigBuf) + EML_RESPONSES);
+ int resp1Len;
+// uint8_t *resp2 = (((uint8_t *)BigBuf) + EML_RESPONSES + 200);
+// int resp2Len;
+ CodeIso14443aAsTag(rAUTH_NT, sizeof(rAUTH_NT));
+ memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
+
+ timer = GetTickCount();
+ uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
+ uint32_t rn_enc = 0x98d76b77; // !!!!!!!!!!!!!!!!!
+ uint32_t ans = 0;
+ cuid = bytes_to_num(rUIDBCC1, 4);
+/*
+ crypto1_create(pcs, key64);
+ crypto1_word(pcs, cuid ^ nonce, 0);
+ crypto1_word(pcs, rn_enc , 1);
+ crypto1_word(pcs, 0, 0);
+ ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
+ num_to_bytes(ans, 4, rAUTH_AT);
+ CodeIso14443aAsTag(rAUTH_AT, sizeof(rAUTH_AT));
+ memcpy(resp2, ToSend, ToSendMax); resp2Len = ToSendMax;
+ Dbprintf("crypto auth time: %d", GetTickCount() - timer);
+*/
// -------------------------------------- END test area
+ // start mkseconds counter
+ StartCountUS();
// We need to listen to the high-frequency, peak-detected path.
SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_ISO14443A | FPGA_HF_ISO14443A_TAGSIM_LISTEN);
SpinDelay(200);
-Dbprintf("--> start");
+ Dbprintf("--> start");
+ // calibrate mkseconds counter
+ GetDeltaCountUS();
while (true) {
WDT_HIT();
-// timer = GetTickCount();
-// Dbprintf("time: %d", GetTickCount() - timer);
+
+ if(BUTTON_PRESS()) {
+ break;
+ }
// find reader field
// Vref = 3300mV, and an 10:1 voltage divider on the input
}
if (cardSTATE != MFEMUL_NOFIELD) {
- res = EmGetCmd(receivedCmd, &len, 100);
+ res = EmGetCmd(receivedCmd, &len, 100); // (+ nextCycleTimeout)
if (res == 2) {
cardSTATE = MFEMUL_NOFIELD;
LEDsoff();
if(res) break;
}
- if(BUTTON_PRESS()) {
- break;
- }
-
+ nextCycleTimeout = 0;
+
// if (len) Dbprintf("len:%d cmd: %02x %02x %02x %02x", len, receivedCmd[0], receivedCmd[1], receivedCmd[2], receivedCmd[3]);
+
+ if (len != 4 && cardSTATE != MFEMUL_NOFIELD) { // len != 4 <---- speed up the code 4 authentication
+ // REQ or WUP request in ANY state and WUP in HALTED state
+ if (len == 1 && ((receivedCmd[0] == 0x26 && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == 0x52)) {
+ selTimer = GetTickCount();
+ EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == 0x52));
+ cardSTATE = MFEMUL_SELECT1;
+
+ // init crypto block
+ LED_B_OFF();
+ LED_C_OFF();
+ crypto1_destroy(pcs);
+ cardAUTHKEY = 0xff;
+ }
+ }
switch (cardSTATE) {
case MFEMUL_NOFIELD:{
break;
}
case MFEMUL_HALTED:{
- // WUP request
- if (!(len == 1 && receivedCmd[0] == 0x52)) break;
+ break;
}
case MFEMUL_IDLE:{
- // REQ or WUP request
- if (len == 1 && (receivedCmd[0] == 0x26 || receivedCmd[0] == 0x52)) {
-timer = GetTickCount();
- EmSendCmdEx(rATQA, sizeof(rATQA), (receivedCmd[0] == 0x52));
- cardSTATE = MFEMUL_SELECT1;
-
- // init crypto block
- crypto1_destroy(pcs);
- cardAUTHKEY = 0xff;
- }
break;
}
case MFEMUL_SELECT1:{
}
// select card
- if (len == 9 && (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70)) {
+ if (len == 9 &&
+ (receivedCmd[0] == 0x93 && receivedCmd[1] == 0x70 && memcmp(&receivedCmd[2], rUIDBCC1, 4) == 0)) {
EmSendCmd(rSAK, sizeof(rSAK));
cuid = bytes_to_num(rUIDBCC1, 4);
cardSTATE = MFEMUL_WORK;
LED_B_ON();
-Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - timer);
+ Dbprintf("--> WORK. anticol1 time: %d", GetTickCount() - selTimer);
}
break;
cuid = bytes_to_num(rUIDBCC2, 4);
cardSTATE = MFEMUL_WORK;
LED_B_ON();
-Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - timer);
+Dbprintf("--> WORK. anticol2 time: %d", GetTickCount() - selTimer);
break;
}
case MFEMUL_AUTH1:{
-if (len) Dbprintf("au1 len:%d cmd: %02x %02x %02x %02x", len, receivedCmd[0], receivedCmd[1], receivedCmd[2], receivedCmd[3]);
if (len == 8) {
-
+// ---------------------------------
+ rn_enc = bytes_to_num(receivedCmd, 4);
+ crypto1_create(pcs, key64);
+ crypto1_word(pcs, cuid ^ nonce, 0);
+ crypto1_word(pcs, rn_enc , 1);
+ crypto1_word(pcs, 0, 0);
+ ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
+ num_to_bytes(ans, 4, rAUTH_AT);
+// ---------------------------------
+ EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
+ cardSTATE = MFEMUL_AUTH2;
+ } else {
+ cardSTATE = MFEMUL_IDLE;
+ LED_B_OFF();
+ LED_C_OFF();
}
- break;
+ if (cardSTATE != MFEMUL_AUTH2) break;
}
case MFEMUL_AUTH2:{
+ // test auth info here...
LED_C_ON();
-Dbprintf("AUTH COMPLETED. sec=%d, key=%d time=%d", cardAUTHSC, cardAUTHKEY, GetTickCount() - timer);
+ cardSTATE = MFEMUL_WORK;
+Dbprintf("AUTH COMPLETED. sec=%d, key=%d time=%d", cardAUTHSC, cardAUTHKEY, GetTickCount() - authTimer);
break;
}
case MFEMUL_WORK:{
// auth
if (len == 4 && (receivedCmd[0] == 0x60 || receivedCmd[0] == 0x61)) {
-timer = GetTickCount();
- crypto1_create(pcs, key64);
+authTimer = GetTickCount();
+// EmSendCmd(rAUTH_NT, sizeof(rAUTH_NT));
+ EmSendCmd14443aRaw(resp1, resp1Len, 0);
+LogTrace(NULL, 0, GetDeltaCountUS(), 0, TRUE);
+// crypto1_create(pcs, key64);
// if (cardAUTHKEY == 0xff) { // first auth
- crypto1_word(pcs, cuid ^ bytes_to_num(rAUTH_NT, 4), 0); // uid ^ nonce
+// crypto1_word(pcs, cuid ^ bytes_to_num(rAUTH_NT, 4), 0); // uid ^ nonce
// } else { // nested auth
// }
- EmSendCmd(rAUTH_NT, sizeof(rAUTH_NT));
- cardAUTHSC = receivedCmd[1];
+ cardAUTHSC = receivedCmd[1] / 4; // received block num
cardAUTHKEY = receivedCmd[0] - 0x60;
cardSTATE = MFEMUL_AUTH1;
+ nextCycleTimeout = 10;
+ break;
+ }
+
+ if (len == 0) break;
+
+ // decrypt seqence
+ if (cardAUTHKEY != 0xff) mf_crypto1_decrypt(pcs, receivedCmd, len);
+
+ // rule 13 of 7.5.3. in ISO 14443-4. chaining shall be continued
+ // BUT... ACK --> NACK
+ if (len == 1 && receivedCmd[0] == CARD_ACK) {
+ EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+ break;
}
+ // rule 12 of 7.5.3. in ISO 14443-4. R(NAK) --> R(ACK)
+ if (len == 1 && receivedCmd[0] == CARD_NACK_NA) {
+ EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+ break;
+ }
+
+ // read block
+ if (len == 4 && receivedCmd[0] == 0x30) {
+ if (receivedCmd[1] >= 16 * 4) {
+ EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+ break;
+ }
+ emlGetMem(response, receivedCmd[1], 1);
+ AppendCrc14443a(response, 16);
+ mf_crypto1_encrypt(pcs, response, 18, &par);
+ EmSendCmdPar(response, 18, par);
+ break;
+ }
+
+ // write block
+ if (len == 4 && receivedCmd[0] == 0xA0) {
+ if (receivedCmd[1] >= 16 * 4) {
+ EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+ break;
+ }
+ EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+ nextCycleTimeout = 50;
+ cardSTATE = MFEMUL_WRITEBL2;
+ cardWRBL = receivedCmd[1];
+ break;
+ }
+
// halt
- if (len == 4 && (receivedCmd[0] == 0x50 || receivedCmd[0] == 0x00)) {
+ if (len == 4 && (receivedCmd[0] == 0x50 && receivedCmd[1] == 0x00)) {
cardSTATE = MFEMUL_HALTED;
LED_B_OFF();
+ LED_C_OFF();
+ Dbprintf("--> HALTED. Selected time: %d ms", GetTickCount() - selTimer);
+ break;
}
break;
+
+ // command not allowed
+ if (len == 4) {
+ EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_NACK_NA));
+ break;
+ }
+ }
+ case MFEMUL_WRITEBL2:{
+ if (len == 18){
+ mf_crypto1_decrypt(pcs, receivedCmd, len);
+ emlSetMem(receivedCmd, cardWRBL, 1);
+ EmSend4bit(mf_crypto1_encrypt4bit(pcs, CARD_ACK));
+ cardSTATE = MFEMUL_WORK;
+ break;
+ }
+Dbprintf("err write block: %d len:%d", cardWRBL, len);
+ break;
}
}
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
+ // add trace trailer
+ memset(rAUTH_NT, 0x44, 4);
+ LogTrace(rAUTH_NT, 4, 0, 0, TRUE);
+
DbpString("Emulator stopped.");
}
projects / proxmark3-svn / blobdiff