- //-----------------------------------------------------------------------------
+ //-----------------------------------------------------------------------------
// Merlok - June 2011, 2012
// Gerhard de Koning Gans - May 2008
// Hagen Fritsch - June 2010
uint8_t cardAUTHKEY = 0xff; // no authentication
// allow collecting up to 8 sets of nonces to allow recovery of up to 8 keys
- nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; // for 2 separate attack types (std, moebius)
- memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
-
- uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2]; // for 2nd attack type (moebius)
- memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
- uint8_t nonce1_count = 0;
- uint8_t nonce2_count = 0;
- uint8_t moebius_n_count = 0;
- bool gettingMoebius = false;
- uint8_t mM = 0; // moebius_modifier for collection storage
-
+ nonces_t ar_nr_nonces[ATTACK_KEY_COUNT]; // for attack types moebius
+ memset(ar_nr_nonces, 0x00, sizeof(ar_nr_nonces));
+ uint8_t moebius_count = 0;
switch (tagType) {
case 1: { // MIFARE Classic 1k
memcpy(data+3, emdata+4, 4); // uid bytes 3-7
flags |= FLAG_7B_UID_IN_DATA;
}
- } break;
+ } break;
+ case 8: { // MIFARE Classic 4k
+ response1[0] = 0x02;
+ sak = 0x18;
+ } break;
default: {
Dbprintf("Error: unkown tagtype (%d)",tagType);
return;
// Clean receive command buffer
if(!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)) {
- DbpString("Button press");
+ Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen());
break;
}
p_response = NULL;
p_response = NULL;
} else if (receivedCmd[0] == MIFARE_ULEV1_READ_CNT && tagType == 7) { // Received a READ COUNTER --
uint8_t index = receivedCmd[1];
- uint8_t data[] = {0x00,0x00,0x00,0x14,0xa5};
+ uint8_t cmd[] = {0x00,0x00,0x00,0x14,0xa5};
if ( counters[index] > 0) {
- num_to_bytes(counters[index], 3, data);
- AppendCrc14443a(data, sizeof(data)-2);
+ num_to_bytes(counters[index], 3, cmd);
+ AppendCrc14443a(cmd, sizeof(cmd)-2);
}
- EmSendCmdEx(data,sizeof(data),false);
+ EmSendCmdEx(cmd,sizeof(cmd),false);
p_response = NULL;
} else if (receivedCmd[0] == MIFARE_ULEV1_INCR_CNT && tagType == 7) { // Received a INC COUNTER --
// number of counter
EmSendCmdEx(emdata, sizeof(emdata), false);
p_response = NULL;
} else {
+
+ cardAUTHKEY = receivedCmd[0] - 0x60;
+ cardAUTHSC = receivedCmd[1] / 4; // received block num
- // incease nonce at every command recieved. this is time consuming.
+ // incease nonce at AUTH requests. this is time consuming.
nonce = prand();
- num_to_bytes(nonce, 4, response5);
- prepare_tag_modulation(&responses[5], DYNAMIC_MODULATION_BUFFER_SIZE);
-
- cardAUTHSC = receivedCmd[1] / 4; // received block num
- cardAUTHKEY = receivedCmd[0] - 0x60;
- p_response = &responses[5]; order = 7;
+ //num_to_bytes(nonce, 4, response5);
+ num_to_bytes(nonce, 4, dynamic_response_info.response);
+ dynamic_response_info.response_n = 4;
+
+ //prepare_tag_modulation(&responses[5], DYNAMIC_MODULATION_BUFFER_SIZE);
+ prepare_tag_modulation(&dynamic_response_info, DYNAMIC_MODULATION_BUFFER_SIZE);
+ p_response = &dynamic_response_info;
+ //p_response = &responses[5];
+ order = 7;
}
} else if(receivedCmd[0] == ISO14443A_CMD_RATS) { // Received a RATS request
if (tagType == 1 || tagType == 2) { // RATS not supported
// Collect AR/NR per keytype & sector
if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {
- for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+ int8_t index = -1;
+ int8_t empty = -1;
+ for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+ // find which index to use
+ if ( (cardAUTHSC == ar_nr_nonces[i].sector) && (cardAUTHKEY == ar_nr_nonces[i].keytype))
+ index = i;
+
+ // keep track of empty slots.
+ if ( ar_nr_nonces[i].state == EMPTY)
+ empty = i;
+ }
+ // if no empty slots. Choose first and overwrite.
+ if ( index == -1 ) {
+ if ( empty == -1 ) {
+ index = 0;
+ ar_nr_nonces[index].state = EMPTY;
+ } else {
+ index = empty;
+ }
+ }
+
+ switch(ar_nr_nonces[index].state) {
+ case EMPTY: {
+ // first nonce collect
+ ar_nr_nonces[index].cuid = cuid;
+ ar_nr_nonces[index].sector = cardAUTHSC;
+ ar_nr_nonces[index].keytype = cardAUTHKEY;
+ ar_nr_nonces[index].nonce = nonce;
+ ar_nr_nonces[index].nr = nr;
+ ar_nr_nonces[index].ar = ar;
+ ar_nr_nonces[index].state = FIRST;
+ break;
+ }
+ case FIRST : {
+ // second nonce collect
+ ar_nr_nonces[index].nonce2 = nonce;
+ ar_nr_nonces[index].nr2 = nr;
+ ar_nr_nonces[index].ar2 = ar;
+ ar_nr_nonces[index].state = SECOND;
+
+ // send to client
+ cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, 0, 0, &ar_nr_nonces[index], sizeof(nonces_t));
- if ( ar_nr_collected[i+mM] == 0 || (
- (cardAUTHSC == ar_nr_resp[i+mM].sector) &&
- (cardAUTHKEY == ar_nr_resp[i+mM].keytype) &&
- (ar_nr_collected[i+mM] > 0)
- )
- ) {
-
- // if first auth for sector, or matches sector and keytype of previous auth
- if (ar_nr_collected[i+mM] > 1) continue;
-
- // if we haven't already collected 2 nonces for this sector
- if (ar_nr_resp[ar_nr_collected[i+mM]].ar != ar) {
- // Avoid duplicates... probably not necessary, ar should vary.
- if (ar_nr_collected[i+mM]==0) {
- // first nonce collect
- nonce1_count++;
- // add this nonce to first moebius nonce
- ar_nr_resp[i+ATTACK_KEY_COUNT].cuid = cuid;
- ar_nr_resp[i+ATTACK_KEY_COUNT].sector = cardAUTHSC;
- ar_nr_resp[i+ATTACK_KEY_COUNT].keytype = cardAUTHKEY;
- ar_nr_resp[i+ATTACK_KEY_COUNT].nonce = nonce;
- ar_nr_resp[i+ATTACK_KEY_COUNT].nr = nr;
- ar_nr_resp[i+ATTACK_KEY_COUNT].ar = ar;
- ar_nr_collected[i+ATTACK_KEY_COUNT]++;
- } else {
- // second nonce collect (std and moebius)
- ar_nr_resp[i+mM].nonce2 = nonce;
- ar_nr_resp[i+mM].nr2 = nr;
- ar_nr_resp[i+mM].ar2 = ar;
-
- if (!gettingMoebius) {
- nonce2_count++;
- // check if this was the last second nonce we need for std attack
- if ( nonce2_count == nonce1_count ) {
- // done collecting std test switch to moebius
- // first finish incrementing last sample
- ar_nr_collected[i+mM]++;
- // switch to moebius collection
- gettingMoebius = true;
- mM = ATTACK_KEY_COUNT;
- break;
- }
- } else {
- moebius_n_count++;
- // if we've collected all the nonces we need - finish.
- if (nonce1_count == moebius_n_count) {
- cmd_send(CMD_ACK,CMD_SIMULATE_MIFARE_CARD,0,0,&ar_nr_resp,sizeof(ar_nr_resp));
- nonce1_count = 0;
- nonce2_count = 0;
- moebius_n_count = 0;
- gettingMoebius = false;
- }
- }
- }
- ar_nr_collected[i+mM]++;
- }
- // we found right spot for this nonce stop looking
- break;
- }
+ ar_nr_nonces[index].state = EMPTY;
+ ar_nr_nonces[index].sector = 0;
+ ar_nr_nonces[index].keytype = 0;
+
+ moebius_count++;
+ break;
}
+ default: break;
}
+ }
+ p_response = NULL;
} else if (receivedCmd[0] == MIFARE_ULC_AUTH_1 ) { // ULC authentication, or Desfire Authentication
} else if (receivedCmd[0] == MIFARE_ULEV1_AUTH) { // NTAG / EV-1 authentication
dynamic_response_info.response_n += 2;
if (prepare_tag_modulation(&dynamic_response_info,DYNAMIC_MODULATION_BUFFER_SIZE) == false) {
- Dbprintf("Error preparing tag response");
+ DbpString("Error preparing tag response");
LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
break;
}
*/
if (MF_DBGLEVEL >= 4){
- Dbprintf("-[ Wake ups after halt [%d]", happened);
- Dbprintf("-[ Messages after halt [%d]", happened2);
- Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd);
+ Dbprintf("-[ Wake ups after halt [%d]", happened);
+ Dbprintf("-[ Messages after halt [%d]", happened2);
+ Dbprintf("-[ Num of received cmd [%d]", cmdsRecvd);
+ Dbprintf("-[ Num of moebius tries [%d]", moebius_count);
}
cmd_send(CMD_ACK,1,0,0,0,0);
{
iso14_pcb_blocknum ^= 1;
}
-
return len;
}
// Here, we collect CUID, NT, NR, AR, CUID2, NT2, NR2, AR2
// This can be used in a reader-only attack.
- nonces_t ar_nr_resp[ATTACK_KEY_COUNT*2]; // for 2 separate attack types (nml, moebius)
- memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
-
- uint8_t ar_nr_collected[ATTACK_KEY_COUNT*2]; // for 2nd attack type (moebius)
- memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
- uint8_t nonce1_count = 0;
- uint8_t nonce2_count = 0;
- uint8_t moebius_n_count = 0;
- bool gettingMoebius = false;
- uint8_t mM = 0; // moebius_modifier for collection storage
- bool doBufResetNext = false;
+ nonces_t ar_nr_nonces[ATTACK_KEY_COUNT];
+ memset(ar_nr_nonces, 0x00, sizeof(ar_nr_nonces));
// -- Determine the UID
// Can be set from emulator memory or incoming data
uint32_t nr = bytes_to_num(receivedCmd, 4);
uint32_t ar = bytes_to_num(&receivedCmd[4], 4);
- if (doBufResetNext) {
- // Reset, lets try again!
- if (MF_DBGLEVEL >= 4) Dbprintf("Re-read after previous NR_AR_ATTACK, resetting buffer");
- memset(ar_nr_resp, 0x00, sizeof(ar_nr_resp));
- memset(ar_nr_collected, 0x00, sizeof(ar_nr_collected));
- mM = 0;
- doBufResetNext = false;
- }
-
- for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+ // Collect AR/NR per keytype & sector
+ if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {
- if ( ar_nr_collected[i+mM] == 0 || (
- (cardAUTHSC == ar_nr_resp[i+mM].sector) &&
- (cardAUTHKEY == ar_nr_resp[i+mM].keytype) &&
- (ar_nr_collected[i+mM] > 0)
- )
- ) {
-
- // if first auth for sector, or matches sector and keytype of previous auth
- if (ar_nr_collected[i+mM] < 2) {
- // if we haven't already collected 2 nonces for this sector
- if (ar_nr_resp[ar_nr_collected[i+mM]].ar != ar) {
- // Avoid duplicates... probably not necessary, ar should vary.
- if (ar_nr_collected[i+mM]==0) {
- // first nonce collect
- ar_nr_resp[i+mM].cuid = cuid;
- ar_nr_resp[i+mM].sector = cardAUTHSC;
- ar_nr_resp[i+mM].keytype = cardAUTHKEY;
- ar_nr_resp[i+mM].nonce = nonce;
- ar_nr_resp[i+mM].nr = nr;
- ar_nr_resp[i+mM].ar = ar;
- nonce1_count++;
- // add this nonce to first moebius nonce
- ar_nr_resp[i+ATTACK_KEY_COUNT].cuid = cuid;
- ar_nr_resp[i+ATTACK_KEY_COUNT].sector = cardAUTHSC;
- ar_nr_resp[i+ATTACK_KEY_COUNT].keytype = cardAUTHKEY;
- ar_nr_resp[i+ATTACK_KEY_COUNT].nonce = nonce;
- ar_nr_resp[i+ATTACK_KEY_COUNT].nr = nr;
- ar_nr_resp[i+ATTACK_KEY_COUNT].ar = ar;
- ar_nr_collected[i+ATTACK_KEY_COUNT]++;
- } else { // second nonce collect (std and moebius)
- ar_nr_resp[i+mM].nonce2 = nonce;
- ar_nr_resp[i+mM].nr2 = nr;
- ar_nr_resp[i+mM].ar2 = ar;
- if (!gettingMoebius) {
- nonce2_count++;
- // check if this was the last second nonce we need for std attack
- if ( nonce2_count == nonce1_count ) {
- // done collecting std test switch to moebius
- // first finish incrementing last sample
- ar_nr_collected[i+mM]++;
- // switch to moebius collection
- gettingMoebius = true;
- mM = ATTACK_KEY_COUNT;
- break;
- }
- } else {
- moebius_n_count++;
- // if we've collected all the nonces we need - finish.
-
- if (nonce1_count == moebius_n_count) {
- cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, 0, 0, &ar_nr_resp, sizeof(ar_nr_resp));
- nonce1_count = 0;
- nonce2_count = 0;
- moebius_n_count = 0;
- gettingMoebius = false;
- doBufResetNext = true;
- finished = ( ((flags & FLAG_INTERACTIVE) == FLAG_INTERACTIVE));
- }
- }
- }
- ar_nr_collected[i+mM]++;
- }
+ int8_t index = -1;
+ int8_t empty = -1;
+ for (uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
+ // find which index to use
+ if ( (cardAUTHSC == ar_nr_nonces[i].sector) && (cardAUTHKEY == ar_nr_nonces[i].keytype))
+ index = i;
+
+ // keep track of empty slots.
+ if ( ar_nr_nonces[i].state == EMPTY)
+ empty = i;
+ }
+ // if no empty slots. Choose first and overwrite.
+ if ( index == -1 ) {
+ if ( empty == -1 ) {
+ index = 0;
+ ar_nr_nonces[index].state = EMPTY;
+ } else {
+ index = empty;
}
- // we found right spot for this nonce stop looking
- break;
}
- }
-
- /*
- // Collect AR/NR
- // if(ar_nr_collected < 2 && cardAUTHSC == 2){
- if(ar_nr_collected < 2) {
- // if(ar_nr_responses[2] != nr) {
- ar_nr_responses[ar_nr_collected*4] = cuid;
- ar_nr_responses[ar_nr_collected*4+1] = nonce;
- ar_nr_responses[ar_nr_collected*4+2] = nr;
- ar_nr_responses[ar_nr_collected*4+3] = ar;
- ar_nr_collected++;
- // }
-
- // Interactive mode flag, means we need to send ACK
- finished = ( ((flags & FLAG_INTERACTIVE) == FLAG_INTERACTIVE)&& ar_nr_collected == 2);
+ switch(ar_nr_nonces[index].state) {
+ case EMPTY: {
+ // first nonce collect
+ ar_nr_nonces[index].cuid = cuid;
+ ar_nr_nonces[index].sector = cardAUTHSC;
+ ar_nr_nonces[index].keytype = cardAUTHKEY;
+ ar_nr_nonces[index].nonce = nonce;
+ ar_nr_nonces[index].nr = nr;
+ ar_nr_nonces[index].ar = ar;
+ ar_nr_nonces[index].state = FIRST;
+ break;
+ }
+ case FIRST : {
+ // second nonce collect
+ ar_nr_nonces[index].nonce2 = nonce;
+ ar_nr_nonces[index].nr2 = nr;
+ ar_nr_nonces[index].ar2 = ar;
+ ar_nr_nonces[index].state = SECOND;
+
+ // send to client
+ cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, 0, 0, &ar_nr_nonces[index], sizeof(nonces_t));
+
+ ar_nr_nonces[index].state = EMPTY;
+ ar_nr_nonces[index].sector = 0;
+ ar_nr_nonces[index].keytype = 0;
+ break;
+ }
+ default: break;
+ }
}
+
+ crypto1_word(pcs, nr , 1);
+ uint32_t cardRr = ar ^ crypto1_word(pcs, 0, 0);
- crypto1_word(pcs, ar , 1);
- cardRr = nr ^ crypto1_word(pcs, 0, 0);
-
- test if auth OK
+ //test if auth OK
if (cardRr != prng_successor(nonce, 64)){
- if (MF_DBGLEVEL >= 4) Dbprintf("AUTH FAILED for sector %d with key %c. cardRr=%08x, succ=%08x",
- cardAUTHSC, cardAUTHKEY == 0 ? 'A' : 'B',
- cardRr, prng_successor(nonce, 64));
- Shouldn't we respond anything here?
- Right now, we don't nack or anything, which causes the
- reader to do a WUPA after a while. /Martin
- -- which is the correct response. /piwi
+ if (MF_DBGLEVEL >= 3) {
+ Dbprintf("AUTH FAILED for sector %d with key %c. [nr=%08x cardRr=%08x] [nt=%08x succ=%08x]"
+ , cardAUTHSC
+ , (cardAUTHKEY == 0) ? 'A' : 'B'
+ , nr
+ , cardRr
+ , nonce // nt
+ , prng_successor(nonce, 64)
+ );
+ }
+ // Shouldn't we respond anything here?
+ // Right now, we don't nack or anything, which causes the
+ // reader to do a WUPA after a while. /Martin
+ // -- which is the correct response. /piwi
cardSTATE_TO_IDLE();
LogTrace(Uart.output, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
break;
}
- */
ans = prng_successor(nonce, 96) ^ crypto1_word(pcs, 0, 0);
num_to_bytes(ans, 4, rAUTH_AT);
EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
LED_C_ON();
- if (MF_DBGLEVEL >= 4) {
+ if (MF_DBGLEVEL >= 1) {
Dbprintf("AUTH COMPLETED for sector %d with key %c. time=%d",
cardAUTHSC,
cardAUTHKEY == 0 ? 'A' : 'B',
receivedCmd[0] == MIFARE_AUTH_KEYB) ) {
authTimer = GetTickCount();
- cardAUTHSC = receivedCmd[1] / 4; // received block num
- cardAUTHKEY = receivedCmd[0] - 0x60; // & 1
+ cardAUTHSC = receivedCmd[1] / 4; // received block -> sector
+ cardAUTHKEY = receivedCmd[0] & 0x1;
crypto1_destroy(pcs);
+
+ // load key into crypto
crypto1_create(pcs, emlGetKey(cardAUTHSC, cardAUTHKEY));
- if (!encrypted_data) {
+ if (!encrypted_data) {
// first authentication
- crypto1_word(pcs, cuid ^ nonce, 0);// Update crypto state
- num_to_bytes(nonce, 4, rAUTH_AT); // Send nonce
-
- if (MF_DBGLEVEL >= 4) Dbprintf("Reader authenticating for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY );
-
+ // Update crypto state init (UID ^ NONCE)
+ crypto1_word(pcs, cuid ^ nonce, 0);
+ num_to_bytes(nonce, 4, rAUTH_AT);
} else {
// nested authentication
ans = nonce ^ crypto1_word(pcs, cuid ^ nonce, 0);
num_to_bytes(ans, 4, rAUTH_AT);
- if (MF_DBGLEVEL >= 4) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %d",receivedCmd[1] ,receivedCmd[1],cardAUTHKEY );
+ if (MF_DBGLEVEL >= 3) Dbprintf("Reader doing nested authentication for block %d (0x%02x) with key %c", receivedCmd[1], receivedCmd[1], cardAUTHKEY == 0 ? 'A' : 'B');
}
EmSendCmd(rAUTH_AT, sizeof(rAUTH_AT));
}
}
- // Interactive mode flag, means we need to send ACK
- /*
- if((flags & FLAG_INTERACTIVE) == FLAG_INTERACTIVE && flags & FLAG_NR_AR_ATTACK == FLAG_NR_AR_ATTACK) {
- // May just aswell send the collected ar_nr in the response aswell
- uint8_t len = ar_nr_collected * 4 * 4;
- cmd_send(CMD_ACK, CMD_SIMULATE_MIFARE_CARD, len, 0, &ar_nr_responses, len);
- }
- */
-
- if( ((flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) && MF_DBGLEVEL >= 1 ) {
- for ( uint8_t i = 0; i < ATTACK_KEY_COUNT; i++) {
- if (ar_nr_collected[i] == 2) {
- Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
- Dbprintf("../tools/mfkey/mfkey32 %08x %08x %08x %08x %08x %08x",
- ar_nr_resp[i].cuid, //UID
- ar_nr_resp[i].nonce, //NT
- ar_nr_resp[i].nr, //NR1
- ar_nr_resp[i].ar, //AR1
- ar_nr_resp[i].nr2, //NR2
- ar_nr_resp[i].ar2 //AR2
- );
- }
- }
- for ( uint8_t i = ATTACK_KEY_COUNT; i < ATTACK_KEY_COUNT*2; i++) {
- if (ar_nr_collected[i] == 2) {
- Dbprintf("Collected two pairs of AR/NR which can be used to extract %s from reader for sector %d:", (i<ATTACK_KEY_COUNT/2) ? "keyA" : "keyB", ar_nr_resp[i].sector);
- Dbprintf("../tools/mfkey/mfkey32v2 %08x %08x %08x %08x %08x %08x %08x",
- ar_nr_resp[i].cuid, //UID
- ar_nr_resp[i].nonce, //NT
- ar_nr_resp[i].nr, //NR1
- ar_nr_resp[i].ar, //AR1
- ar_nr_resp[i].nonce2,//NT2
- ar_nr_resp[i].nr2, //NR2
- ar_nr_resp[i].ar2 //AR2
- );
- }
- }
- }
-
if (MF_DBGLEVEL >= 1)
Dbprintf("Emulator stopped. Tracing: %d trace length: %d ", tracing, BigBuf_get_traceLen());
projects / proxmark3-svn / blobdiff