1. fixed send manchester

2. emulator commands select, authenticate, read block, write block works
3. nested authentication - not working (maybe next release)
4. small bugfixes
5. mifare1ksim - in alpha state!!! code not so clear!!!
This commit is contained in:
Merlokbr@gmail.com 2011-06-16 14:43:49 +00:00
commit 8f51ddb0bd
6 changed files with 366 additions and 122 deletions

View file

@ -26,11 +26,11 @@ static int rsamples = 0;
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
@ -60,16 +60,6 @@ static const uint8_t OddByteParity[256] = {
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
// card emulator memory
#define CARD_MEMORY 7260
#define CARD_MEMORY_LEN 1024
uint8_t trigger = 0;
void iso14a_set_trigger(int enable) {
trigger = enable;
@ -787,12 +777,12 @@ done:
//-----------------------------------------------------------------------------
// 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);
@ -803,55 +793,68 @@ static void CodeIso14443aAsTag(const uint8_t *cmd, int len)
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;
// }
// Send stopbit
ToSend[++ToSendMax] = SEC_F;
// if (oddparity != ((dwParity >> i) & 0x01))
// Dbprintf("par error. i=%d", i);
}
// 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;
@ -889,11 +892,47 @@ static void CodeStrangeAnswer()
// 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++;
}
//-----------------------------------------------------------------------------
@ -1066,7 +1105,7 @@ ComputeCrc14443(CRC_14443_A, response3a, 1, &response3a[1], &response3a[2]);
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)
@ -1472,12 +1511,12 @@ static int EmGetCmd(uint8_t *received, int *len, int maxLen)
volatile uint8_t b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
if(MillerDecoding((b & 0xf0) >> 4)) {
*len = Uart.byteCnt;
if (tracing) LogTrace(received, *len, 0, GetParity(received, *len), TRUE);
if (tracing) LogTrace(received, *len, GetDeltaCountUS(), Uart.parityBits, TRUE);
return 0;
}
if(MillerDecoding(b & 0x0f)) {
*len = Uart.byteCnt;
if (tracing) LogTrace(received, *len, 0, GetParity(received, *len), TRUE);
if (tracing) LogTrace(received, *len, GetDeltaCountUS(), Uart.parityBits, TRUE);
return 0;
}
}
@ -1509,7 +1548,7 @@ static int EmSendCmd14443aRaw(uint8_t *resp, int respLen, int correctionNeeded)
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY)) {
if(i > respLen) {
b = 0x00;
b = 0xff; // was 0x00
u++;
} else {
b = resp[i];
@ -1527,15 +1566,34 @@ static int EmSendCmd14443aRaw(uint8_t *resp, int respLen, int correctionNeeded)
return 0;
}
static int EmSendCmdEx(uint8_t *resp, int respLen, int correctionNeeded){
CodeIso14443aAsTag(resp, respLen);
int EmSend4bitEx(uint8_t resp, int correctionNeeded){
Code4bitAnswerAsTag(resp);
int res = EmSendCmd14443aRaw(ToSend, ToSendMax, correctionNeeded);
if (tracing) LogTrace(resp, respLen, 0, GetParity(resp, respLen), FALSE);
if (tracing) LogTrace(&resp, 1, GetDeltaCountUS(), GetParity(&resp, 1), FALSE);
return res;
}
static int EmSendCmd(uint8_t *resp, int respLen){
return EmSendCmdEx(resp, respLen, 0);
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));
}
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);
}
//-----------------------------------------------------------------------------
@ -1993,10 +2051,7 @@ void MifareReadBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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}};
@ -2088,10 +2143,7 @@ void MifareReadSector(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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}};
@ -2177,10 +2229,7 @@ void MifareWriteBlock(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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}};
@ -2392,10 +2441,7 @@ void MifareNested(uint32_t arg0, uint32_t arg1, uint32_t arg2, uint8_t *datain)
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++) {
@ -2502,10 +2548,7 @@ void MifareChkKeys(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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}};
@ -2531,13 +2574,14 @@ void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
{
int cardSTATE = MFEMUL_NOFIELD;
int vHf = 0; // in mV
int res, i;
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 bt;
uint8_t cardWRBL = 0;
uint8_t cardAUTHSC = 0;
uint8_t cardAUTHKEY = 0xff; // no authentication
uint32_t cuid = 0;
@ -2547,7 +2591,8 @@ void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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
@ -2558,19 +2603,23 @@ void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
static uint8_t rAUTH_NT[] = {0x1a, 0xac, 0xff, 0x4f};
static uint8_t rAUTH_AT[] = {0x00, 0x00, 0x00, 0x00};
static uint8_t cmdBuf[18];
// 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) + CARD_MEMORY);
uint8_t *resp1 = (((uint8_t *)BigBuf) + EML_RESPONSES);
int resp1Len;
uint8_t *resp2 = (((uint8_t *)BigBuf) + CARD_MEMORY + 200);
int resp2Len;
// uint8_t *resp2 = (((uint8_t *)BigBuf) + EML_RESPONSES + 200);
// int resp2Len;
CodeIso14443aAsTag(rAUTH_NT, sizeof(rAUTH_NT));
memcpy(resp1, ToSend, ToSendMax); resp1Len = ToSendMax;
@ -2579,7 +2628,7 @@ void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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);
@ -2589,8 +2638,10 @@ void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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);
@ -2599,10 +2650,16 @@ void Mifare1ksim(uint8_t arg0, uint8_t arg1, uint8_t arg2, uint8_t *datain)
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();
if(BUTTON_PRESS()) {
break;
}
// find reader field
// Vref = 3300mV, and an 10:1 voltage divider on the input
// can measure voltages up to 33000 mV
@ -2615,7 +2672,7 @@ Dbprintf("--> start");
}
if (cardSTATE != MFEMUL_NOFIELD) {
res = EmGetCmd(receivedCmd, &len, 100);
res = EmGetCmd(receivedCmd, &len, 100); // (+ nextCycleTimeout)
if (res == 2) {
cardSTATE = MFEMUL_NOFIELD;
LEDsoff();
@ -2624,13 +2681,12 @@ Dbprintf("--> start");
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
// 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));
@ -2683,12 +2739,11 @@ Dbprintf("--> start");
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 == 8) {
timer = GetTickCount();
// ---------------------------------
rn_enc = bytes_to_num(receivedCmd, 4);
crypto1_create(pcs, key64);
@ -2699,7 +2754,6 @@ timer = GetTickCount();
num_to_bytes(ans, 4, rAUTH_AT);
// ---------------------------------
EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
// EmSendCmd14443aRaw(resp2, resp2Len, 0);
cardSTATE = MFEMUL_AUTH2;
} else {
cardSTATE = MFEMUL_IDLE;
@ -2713,16 +2767,16 @@ timer = GetTickCount();
LED_C_ON();
cardSTATE = MFEMUL_WORK;
Dbprintf("AUTH COMPLETED. sec=%d, key=%d time=%d a=%d", cardAUTHSC, cardAUTHKEY, GetTickCount() - authTimer, GetTickCount() - timer);
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)) {
authTimer = GetTickCount();
authTimer = GetTickCount();
// EmSendCmd(rAUTH_NT, sizeof(rAUTH_NT));
//SpinDelayUs(30);
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
@ -2732,50 +2786,54 @@ Dbprintf("AUTH COMPLETED. sec=%d, key=%d time=%d a=%d", cardAUTHSC, cardAUTHKEY,
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){
if (len != 1) {
for (i = 0; i < len; i++)
receivedCmd[i] = crypto1_byte(pcs, 0x00, 0) ^ receivedCmd[i];
} else {
bt = 0;
for (i = 0; i < 4; i++)
bt |= (crypto1_bit(pcs, 0, 0) ^ BIT(receivedCmd[0], i)) << i;
if (cardAUTHKEY != 0xff) mf_crypto1_decrypt(pcs, receivedCmd, len);
receivedCmd[0] = bt;
}
// 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) {
cmdBuf[0] = 0;
par = 0;
/* memcpy(cmdBuf, blockData, 16);
AppendCrc14443a(cmdBuf, 16);
// crypto
par = 0;
for (i = 0; i < 18; i++) {
d_block_enc[pos] = crypto1_byte(pcs, 0x00, 0) ^ cmdBuf[pos];
par = (par >> 1) | ( ((filter(pcs->odd) ^ oddparity(cmdBuf[pos])) & 0x01) * 0x20000 );
}
*/
//ReaderTransmitPar(d_block_enc, sizeof(d_block_enc), par);
Dbprintf("read block: %d", receivedCmd[1]);
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) {
Dbprintf("write block: %d", receivedCmd[1]);
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[1] == 0x00)) {
cardSTATE = MFEMUL_HALTED;
@ -2785,6 +2843,23 @@ Dbprintf("write block: %d", receivedCmd[1]);
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;
}
}
@ -2795,6 +2870,7 @@ Dbprintf("write block: %d", receivedCmd[1]);
LEDsoff();
// add trace trailer
memset(rAUTH_NT, 0x44, 4);
LogTrace(rAUTH_NT, 4, 0, 0, TRUE);
DbpString("Emulator stopped.");