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CHG: finalized the merge between peter filmoores 14atagfuzz branch (emv). I seriously doubt anything works.

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This commit is contained in:
iceman1001
2017-03-01 21:51:23 +01:00
parent a9eeb57698
commit 99136c6eef
12 changed files with 678 additions and 248 deletions
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707
armsrc/emvcmd.c
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@@ -10,10 +10,37 @@
//--------------------------------------------------------------------------------
#include "emvcmd.h"
static emvtags currentcard; //use to hold emv tags for the reader/card during communications
static emvcard currentcard; //use to hold emv tags for the reader/card during communications
// The FPGA will report its internal sending delay in
//uint16_t FpgaSendQueueDelay;
void EMVTest()
{
uint8_t rats[0x0b] = {0x0b,0x78,0x80,0x81,0x02,0x4b,0x4f,0x4e,0x41, 0x14, 0x11};
EMVFuzz_RATS(0xb, rats);
//grab card
//EMVClone(1,1);
/*
uint8_t tagvalbuffer[256];
uint8_t tagvallen;
uint8_t template6F[] = {0x6F,0x00};
uint8_t templateA5[] = {0xA5,0x00};
uint8_t tag1[] = {0x50,0x00,0x00};
uint8_t tag2[] = {0x87,0x00,0x00};
uint8_t tag3[] = {0x9f,0x38,0x00};
uint8_t tag4[] = {0x5F,0x2D,0x00};
uint8_t tag5[] = {0x9F,0x11,0x00};
uint8_t tag6[] = {0x9F,0x12,0x00};
uint8_t tag7[] = {0x84, 0x00};
uint8_t tag8[] = {0xA5, 0x00};
emv_generatetemplate(templateA5,&currentcard,tagvalbuffer,&tagvallen, 6, tag1, tag2, tag3, tag4, tag5, tag6);
memcpy(currentcard.tag_A5, tagvalbuffer+2, tagvallen-2);
currentcard.tag_A5_len = tagvallen-2;
emv_generatetemplate(template6F,&currentcard,currentcard.tag_6F ,&currentcard.tag_6F_len, 2, tag7, tag8);
Dbprintf("TAG A5=");
Dbhexdump(currentcard.tag_A5_len,currentcard.tag_A5 , false);
*/
//EMVSim();
}
//load individual tag into current card
@@ -23,21 +50,25 @@ void EMVloadvalue(uint32_t tag, uint8_t *datain){
emv_settag(tag, datain, &currentcard);
}
void EMVReadRecord(uint8_t arg0, uint8_t arg1,emvtags *currentcard)
void EMVReadRecord(uint8_t arg0, uint8_t arg1,emvcard *currentcard)
{
uint8_t record = arg0;
uint8_t sfi = arg1 & 0x0F; // convert arg1 to number
uint8_t receivedAnswer[MAX_FRAME_SIZE];
uint8_t *resp = BigBuf_malloc(256);
// variables
tlvtag inputtag; // create the tag structure
LED_A_ON();
LED_B_OFF();
LED_C_OFF();
// perform read
// write the result to the provided card
if(!emv_readrecord(record,sfi,receivedAnswer)) {
while(true) {
if(!emv_readrecord(record, sfi, resp)) {
if(MF_DBGLEVEL >= 1) Dbprintf("readrecord failed");
}
if(*(receivedAnswer+1) == 0x70){
decode_ber_tlv_item(receivedAnswer+1, &inputtag);
if(*(resp+1) == 0x70){
decode_ber_tlv_item(resp+1, &inputtag);
emv_decode_field(inputtag.value, inputtag.valuelength, currentcard);
}
else
@@ -45,46 +76,79 @@ void EMVReadRecord(uint8_t arg0, uint8_t arg1,emvtags *currentcard)
if(MF_DBGLEVEL >= 1)
Dbprintf("Record not found SFI=%i RECORD=%i", sfi, record);
}
return;
LED_B_ON();
LED_B_OFF();
break;
}
LEDsoff();
}
void EMVSelectAID(uint8_t *AID, uint8_t AIDlen, emvtags* inputcard)
{
uint8_t receivedAnswer[MAX_FRAME_SIZE];
void EMVSelectAID(uint8_t *AID, uint8_t AIDlen, emvcard* inputcard)
{
uint8_t* resp = BigBuf_malloc(256);
// variables
tlvtag inputtag; // create the tag structure
// perform select
if(!emv_select(AID, AIDlen, receivedAnswer)){
if(MF_DBGLEVEL == 1) Dbprintf("AID Select failed");
return;
}
// write the result to the provided card
if(*(receivedAnswer+1) == 0x6F){
// decode the 6F template
decode_ber_tlv_item(receivedAnswer+1, &inputtag);
// store 84 and A5 tags
emv_decode_field(inputtag.value, inputtag.valuelength, &currentcard);
// decode the A5 tag
if(currentcard.tag_A5_len > 0)
emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, &currentcard);
tlvtag inputtag; // create the tag structure
LED_A_ON();
LED_B_OFF();
LED_C_OFF();
while(true) {
if(!emv_select(AID, AIDlen, resp)){
if(MF_DBGLEVEL == 1) DbpString("AID Select failed");
break;
}
// write the result to the provided card
if(*(resp+1) == 0x6F){
// decode the 6F template
decode_ber_tlv_item(resp+1, &inputtag);
// store 84 and A5 tags
emv_decode_field(inputtag.value, inputtag.valuelength, &currentcard);
// decode the A5 tag
if(currentcard.tag_A5_len > 0)
emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, &currentcard);
// copy this result to the DFName
if(currentcard.tag_84_len == 0)
memcpy(currentcard.tag_DFName, currentcard.tag_84, currentcard.tag_84_len);
// copy this result to the DFName
if(currentcard.tag_84_len == 0)
memcpy(currentcard.tag_DFName, currentcard.tag_84, currentcard.tag_84_len);
// decode the BF0C result, assuming 1 directory entry for now
if(currentcard.tag_BF0C_len !=0){
emv_decode_field(currentcard.tag_BF0C, currentcard.tag_BF0C_len, &currentcard);}
// retrieve the AID, use the AID to decide what transaction flow to use
if(currentcard.tag_61_len !=0){
emv_decode_field(currentcard.tag_61, currentcard.tag_61_len, &currentcard);}
// decode the BF0C result, assuming 1 directory entry for now
if(currentcard.tag_BF0C_len !=0){
emv_decode_field(currentcard.tag_BF0C, currentcard.tag_BF0C_len, &currentcard);}
// retrieve the AID, use the AID to decide what transaction flow to use
if(currentcard.tag_61_len !=0)
emv_decode_field(currentcard.tag_61, currentcard.tag_61_len, &currentcard);
}
LED_B_ON();
LED_B_OFF();
break;
}
if(MF_DBGLEVEL >= 2) DbpString("SELECT AID COMPLETED");
LEDsoff();
}
void EMVSelectPPSE()
{
while(true) {
if(!emv_selectPPSE()) {
if(MF_DBGLEVEL >= 1) DbpString("PPSE failed");
break;
}
LED_B_ON();
LED_B_OFF();
break;
}
if(MF_DBGLEVEL >= 2)
DbpString("SELECT AID COMPLETED");
if(MF_DBGLEVEL >= 2) DbpString("SELECT PPSE COMPLETED");
LEDsoff();
}
int EMVGetProcessingOptions(uint8_t *PDOL, uint8_t PDOLlen, emvtags* inputcard)
int EMVGetProcessingOptions(uint8_t *PDOL, uint8_t PDOLlen, emvcard* inputcard)
{
uint8_t receivedAnswer[MAX_FRAME_SIZE];
@@ -116,7 +180,7 @@ int EMVGetProcessingOptions(uint8_t *PDOL, uint8_t PDOLlen, emvtags* inputcard)
return 1;
}
int EMVGetChallenge(emvtags* inputcard)
int EMVGetChallenge(emvcard* inputcard)
{
uint8_t receivedAnswer[MAX_FRAME_SIZE];
// variables
@@ -129,7 +193,7 @@ int EMVGetChallenge(emvtags* inputcard)
return 0;
}
int EMVGenerateAC(uint8_t refcontrol, emvtags* inputcard)
int EMVGenerateAC(uint8_t refcontrol, emvcard* inputcard)
{
uint8_t receivedAnswer[MAX_FRAME_SIZE];
uint8_t cdolcommand[MAX_FRAME_SIZE];
@@ -162,37 +226,49 @@ int EMVGenerateAC(uint8_t refcontrol, emvtags* inputcard)
//takes in TTQ, amount authorised, unpredicable number and transaction currency code
int EMV_PaywaveTransaction()
{
uint8_t cardMode = 0;
// determine mode of transaction from TTQ
if((currentcard.tag_9F66[0] & 0x40) == 0x40) {
cardMode = VISA_EMV;
uint8_t *resp = BigBuf_malloc(256);
tlvtag temptag;
//get the current block counter
//select the AID (Mastercard
EMVSelectAID(currentcard.tag_4F,currentcard.tag_4F_len, &currentcard);
if(resp[1] == 0x6F){ //decode template
decode_ber_tlv_item(&resp[1], &temptag);
//decode 84 and A5 tags
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
//decode the A5 tag
emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, &currentcard);
//decode the BF0C result, assuming 1 directory entry for now
//retrieve the AID
}
else if((currentcard.tag_9F66[0] & 0x20) == 0x20) {
cardMode = VISA_FDDA;
}
else if((currentcard.tag_9F66[0] & 0x80) == 0x80) {
if((currentcard.tag_9F66[1] & 0x80) == 0x80) { //CVN17
cardMode = VISA_CVN17;
} else {
cardMode = VISA_DCVV;
}
}
EMVSelectAID(currentcard.tag_4F,currentcard.tag_4F_len, &currentcard); // perform second AID command
// get PDOL
uint8_t pdolcommand[20]; //20 byte buffer for pdol data
uint8_t pdolcommandlen = 0;
if(currentcard.tag_9F38_len > 0) {
emv_generateDOL(currentcard.tag_9F38, currentcard.tag_9F38_len, &currentcard, pdolcommand, &pdolcommandlen);
} else {
pdolcommandlen = 0;
}
Dbhexdump(pdolcommandlen, pdolcommand,false);
if(!EMVGetProcessingOptions(pdolcommand,pdolcommandlen, &currentcard)) {
if(!EMVGetProcessingOptions(pdolcommand, pdolcommandlen, &currentcard)) {
if(MF_DBGLEVEL >= 1) Dbprintf("PDOL failed");
return 1;
}
if(resp[1] == 0x80) //format 1 data field returned
{
memcpy(currentcard.tag_82, &resp[3],2); //copy AIP
currentcard.tag_94_len = resp[2]-2; //AFL len
memcpy(currentcard.tag_94, &resp[5], currentcard.tag_94_len); //copy AFL
}
else if(resp[1] == 0x77) //format 2 data field returned
{
decode_ber_tlv_item(&resp[1], &temptag);
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
}
else
{
//throw an error
}
Dbprintf("AFL=");
Dbhexdump(currentcard.tag_94_len, currentcard.tag_94,false);
Dbprintf("AIP=");
@@ -200,63 +276,106 @@ int EMV_PaywaveTransaction()
emv_decodeAIP(currentcard.tag_82);
//
// decode the AFL list and read records
uint8_t i = 0;
uint8_t sfi = 0;
uint8_t recordstart = 0;
uint8_t recordend = 0;
if(currentcard.tag_94_len > 0){
while( i < currentcard.tag_94_len){
sfi = (currentcard.tag_94[i++] & 0xF8) >> 3;
recordstart = currentcard.tag_94[i++];
recordend = currentcard.tag_94[i++];
for(int j=recordstart; j<(recordend+1); j++){
// read records
EMVReadRecord(j,sfi, &currentcard);
// while(responsebuffer[0] == 0xF2) {
// EMVReadRecord(j,sfi, &currentcard);
// }
}
i++;
}
//record, sfi
EMVReadRecord(1,1,&currentcard);
Dbhexdump(200, resp, false);
EMVReadRecord(2,1,&currentcard);
Dbhexdump(200, resp,false);
EMVReadRecord( 1,2, &currentcard);
Dbhexdump(200, resp,false);
EMVReadRecord(2,2,&currentcard);
Dbhexdump(200, resp,false);
EMVReadRecord( 3,2, &currentcard);
Dbhexdump(200, resp,false);
EMVReadRecord( 4,2, &currentcard);
Dbhexdump(200, resp,false);
EMVReadRecord( 1,3, &currentcard);
Dbhexdump(200, resp,false);
EMVReadRecord(2,3,&currentcard);
Dbhexdump(200, resp,false);
EMVReadRecord(4,2,&currentcard);
EMVReadRecord( 1,3, &currentcard);
Dbhexdump(200, resp,false);
//DDA supported, so read more records
if((currentcard.tag_82[0] & AIP_CDA_SUPPORTED) == AIP_CDA_SUPPORTED){
EMVReadRecord( 1,4, &currentcard);
EMVReadRecord( 2,4, &currentcard);
}
else {
EMVReadRecord(1,1,&currentcard);
EMVReadRecord(1,2,&currentcard);
EMVReadRecord(1,3,&currentcard);
EMVReadRecord(2,1,&currentcard);
EMVReadRecord(2,2,&currentcard);
EMVReadRecord(2,3,&currentcard);
EMVReadRecord(3,1,&currentcard);
EMVReadRecord(3,3,&currentcard);
EMVReadRecord(4,2,&currentcard);
}
// EMVGetChallenge(&currentcard);
// memcpy(currentcard.tag_9F4C,&responsebuffer[1],8); // ICC UN
EMVGenerateAC(0x81,&currentcard);
Dbprintf("CARDMODE=%i",cardMode);
emv_decodeCVM(currentcard.tag_8E, currentcard.tag_8E_len);
/* get ICC dynamic data */
//if((currentcard.tag_82[0] & AIP_CDA_SUPPORTED) == AIP_CDA_SUPPORTED)
{
//DDA supported, so perform GENERATE AC
uint8_t cdolcommand[40]; //20 byte buffer for pdol data
uint8_t cdolcommandlen;
//generate the iCC UN
EMVGetChallenge(&currentcard);
memcpy(currentcard.tag_9F37,&resp[1],8); // ICC UN
memcpy(currentcard.tag_9F4C,&resp[1],8); // ICC UN
if(currentcard.tag_8C_len > 0) {
emv_generateDOL(currentcard.tag_8C, currentcard.tag_8C_len, &currentcard, cdolcommand, &cdolcommandlen);
} else {
cdolcommandlen = 0;
}
Dbhexdump(currentcard.tag_8C_len, currentcard.tag_8C,false);
Dbhexdump(cdolcommandlen, cdolcommand,false);
EMVGenerateAC(0x41, &currentcard);
Dbhexdump(100, resp,false);
}
return 0;
}
int EMV_PaypassTransaction()
{
// uint8_t *responsebuffer = emv_get_bigbufptr();
// tlvtag temptag; //buffer for decoded tags
uint8_t *resp = BigBuf_malloc(256);
tlvtag temptag; //buffer for decoded tags
// get the current block counter
// select the AID (Mastercard
EMVSelectAID(currentcard.tag_4F,currentcard.tag_4F_len, &currentcard);
if(resp[1] == 0x6F){ //decode template
decode_ber_tlv_item(&resp[1], &temptag);
//decode 84 and A5 tags
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
//decode the A5 tag
emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, &currentcard);
//decode the BF0C result, assuming 1 directory entry for now
//retrieve the AID
}
// get PDOL
uint8_t pdolcommand[20]; // 20 byte buffer for pdol data
uint8_t pdolcommandlen = 0;
if(currentcard.tag_9F38_len > 0) {
emv_generateDOL(currentcard.tag_9F38, currentcard.tag_9F38_len, &currentcard, pdolcommand, &pdolcommandlen);
} else {
pdolcommandlen = 0;
}
if(EMVGetProcessingOptions(pdolcommand,pdolcommandlen, &currentcard)) {
if(MF_DBGLEVEL >= 1) Dbprintf("PDOL failed");
return 1;
}
if(resp[1] == 0x80) //format 1 data field returned
{
memcpy(currentcard.tag_82, &resp[3],2); //copy AIP
currentcard.tag_94_len = resp[2]-2; //AFL len
memcpy(currentcard.tag_94, &resp[5],currentcard.tag_94_len); //copy AFL
}
else if(resp[1] == 0x77) //format 2 data field returned
{
decode_ber_tlv_item(&resp[1], &temptag);
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
}
else
{
//throw an error
}
Dbprintf("AFL=");
Dbhexdump(currentcard.tag_94_len, currentcard.tag_94,false);
Dbprintf("AIP=");
@@ -264,57 +383,69 @@ int EMV_PaypassTransaction()
emv_decodeAIP(currentcard.tag_82);
// decode the AFL list and read records
uint8_t i = 0;
uint8_t sfi = 0;
uint8_t recordstart = 0;
uint8_t recordend = 0;
while( i< currentcard.tag_94_len){
sfi = (currentcard.tag_94[i++] & 0xF8) >> 3;
recordstart = currentcard.tag_94[i++];
recordend = currentcard.tag_94[i++];
for(int j=recordstart; j<(recordend+1); j++){
// read records
EMVReadRecord(j,sfi, &currentcard);
// while(responsebuffer[0] == 0xF2) {
// EMVReadRecord(j,sfi, &currentcard);
// }
}
i++;
//record, sfi
EMVReadRecord( 1,1, &currentcard);
EMVReadRecord( 1,2, &currentcard);
EMVReadRecord( 1,3, &currentcard);
EMVReadRecord( 2,3, &currentcard);
//DDA supported, so read more records
if((currentcard.tag_82[0] & AIP_CDA_SUPPORTED) == AIP_CDA_SUPPORTED){
EMVReadRecord( 1,4, &currentcard);
EMVReadRecord( 2,4, &currentcard);
}
/* get ICC dynamic data */
if((currentcard.tag_82[0] & AIP_CDA_SUPPORTED) == AIP_CDA_SUPPORTED)
{
// DDA supported, so perform GENERATE AC
uint8_t cdolcommand[40]; //20 byte buffer for pdol data
uint8_t cdolcommandlen;
// generate the iCC UN
EMVGetChallenge(&currentcard);
//memcpy(currentcard.tag_9F4C,&responsebuffer[1],8); // ICC UN
EMVGenerateAC(0x80,&currentcard);
memcpy(currentcard.tag_9F4C, &resp[1],8); // ICC UN
if(currentcard.tag_8C_len > 0) {
emv_generateDOL(currentcard.tag_8C, currentcard.tag_8C_len, &currentcard, cdolcommand, &cdolcommandlen);
} else {
cdolcommandlen = 0;
}
EMVGenerateAC(0x80, &currentcard);
if(resp[1] == 0x77) //format 2 data field returned
{
decode_ber_tlv_item(&resp[1], &temptag);
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
}
// generate AC2
// if(currentcard.tag_8D_len > 0) {
// emv_generateDOL(currentcard.tag_8D, currentcard.tag_8D_len, &currentcard, cdolcommand, &cdolcommandlen); }
// else{
// //cdolcommand = NULL; //cdol val is null
// cdolcommandlen = 0;
// }
// emv_generateAC(0x80, cdolcommand,cdolcommandlen, &currentcard);
if(currentcard.tag_8D_len > 0) {
emv_generateDOL(currentcard.tag_8D, currentcard.tag_8D_len, &currentcard, cdolcommand, &cdolcommandlen); }
else{
//cdolcommand = NULL; //cdol val is null
cdolcommandlen = 0;
}
EMVGenerateAC(0x80, &currentcard);
// if(responsebuffer[1] == 0x77) //format 2 data field returned
// {
// decode_ber_tlv_item(&responsebuffer[1], &temptag);
// emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
// }
if(resp[1] == 0x77) //format 2 data field returned
{
decode_ber_tlv_item(&resp[1], &temptag);
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
}
}
// generate cryptographic checksum
// uint8_t udol[4] = {0x00,0x00,0x00,0x00};
// emv_computecryptogram(udol, sizeof(udol));
// if(responsebuffer[1] == 0x77) //format 2 data field returned
// {
// decode_ber_tlv_item(&responsebuffer[1], &temptag);
// emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
// }
uint8_t udol[4] = {0x00,0x00,0x00,0x00};
emv_computecryptogram(udol, sizeof(udol), resp);
if(resp[1] == 0x77) //format 2 data field returned
{
decode_ber_tlv_item(&resp[1], &temptag);
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
}
return 0;
}
@@ -329,6 +460,30 @@ void EMVTransaction()
clear_trace();
set_tracing(TRUE);
uint8_t *resp = BigBuf_malloc(256);
//variables
tlvtag temptag; //used to buffer decoded tag valuesd
//initialize the emv card structure
//extern emvcard currentcard;
memset(&currentcard, 0x00, sizeof(currentcard)); //set all to zeros
memcpy(currentcard.tag_9F66,"\xD7\x20\xC0\x00",4);
memcpy(currentcard.tag_9F02,"\x00\x00\x00\x00\x00\x20",6); //20 dollars
memcpy(currentcard.tag_9F37, "\x01\x02\x03\x04", 4); //UN
memcpy(currentcard.tag_5F2A, "\x00\x36",2); //currency code
//CDOL stuff
memcpy(currentcard.tag_9F03,"\x00\x00\x00\x00\x00\x00",6);
memcpy(currentcard.tag_9F1A,"\x00\x36",2); //country code
memcpy(currentcard.tag_95,"\x00\x00\x00\x00\x00",5); //TVR
memcpy(currentcard.tag_9A,"\x14\x04\x01",3); //date
memcpy(currentcard.tag_9C,"\x00",1); //processingcode;
memcpy(currentcard.tag_9F45, "\x00\x00", 2); //Data Authentication Code
memset(currentcard.tag_9F4C,0x00,8); // ICC UN
memcpy(currentcard.tag_9F35,"\x12",1);
memcpy(currentcard.tag_9F34,"\x3F\x00\x00", 3); //CVM
LED_A_ON();
LED_B_OFF();
LED_C_OFF();
@@ -340,10 +495,21 @@ void EMVTransaction()
if(MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
break;
}
//selectPPSE
EMVSelectAID((uint8_t *)DF_PSE, 14, &currentcard); //hard coded len
EMVSelectPPSE();
//get response
if (resp[1] == 0x6F){ //decode template
decode_ber_tlv_item(&resp[1], &temptag);
//decode 84 and A5 tags
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
//decode the A5 tag
emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, &currentcard);
//decode the BF0C result, assuming 1 directory entry for now
if(currentcard.tag_BF0C_len !=0){
emv_decode_field(currentcard.tag_BF0C, currentcard.tag_BF0C_len, &currentcard);}
//retrieve the AID, use the AID to decide what transaction flow to use
if(currentcard.tag_61_len !=0){
emv_decode_field(currentcard.tag_61, currentcard.tag_61_len, &currentcard);}
}
if (!memcmp(currentcard.tag_4F, AID_MASTERCARD, sizeof(AID_MASTERCARD))){
Dbprintf("Mastercard Paypass Card Detected");
EMV_PaypassTransaction();
@@ -353,6 +519,10 @@ void EMVTransaction()
EMV_PaywaveTransaction();
}
//TODO: add other card schemes like AMEX, JCB, China Unionpay etc
LED_B_ON();
//output the sensitive data
cmd_send(CMD_ACK, 0, 0,0,resp,100);
LED_B_OFF();
break;
}
if (MF_DBGLEVEL >= 2) DbpString("EMV TRANSACTION FINISHED");
@@ -364,6 +534,117 @@ void EMVTransaction()
void EMVdumpcard(void){
dumpCard(&currentcard);
}
//EMV clone a card - read up to the max SFI and max records for that SFI
void EMVClone(uint8_t maxsfi, uint8_t maxrecord)
{
//params
uint8_t uid[10];
uint32_t cuid;
uint8_t *resp = BigBuf_malloc(256);
iso14a_card_select_t hi14a_card; //card select values
//variables
tlvtag temptag; //used to buffer decoded tag valuesd
memset(&currentcard, 0x00, sizeof(currentcard)); //set all to zeros
//memcpy(currentcard.tag_9F66,"\x20\x00\x00\x00",4);
memcpy(currentcard.tag_9F66,"\xD7\x20\xC0\x00",4);
//memcpy(currentcard.tag_9F66,"\xC0\x00\x00\x00",2);
memcpy(currentcard.tag_9F02,"\x00\x00\x00\x00\x00\x20",6); //20 dollars
memcpy(currentcard.tag_9F37, "\x01\x02\x03\x04", 4); //UN
memcpy(currentcard.tag_5F2A, "\x00\x36",2); //currency code
//CDOL stuff
//memcpy(currentcard.tag_9F02,"\x00\x00\x00\x00\x00\x20",6);
memcpy(currentcard.tag_9F03,"\x00\x00\x00\x00\x00\x00",6);
memcpy(currentcard.tag_9F1A,"\x00\x36",2); //country code
memcpy(currentcard.tag_95,"\x00\x00\x00\x00\x00",5); //TVR
//memcpy(currentcard.tag_5F2A,"\x00\x36",2);
memcpy(currentcard.tag_9A,"\x14\x04x01",3); //date
memcpy(currentcard.tag_9C,"\x00",1); //processingcode;
memcpy(currentcard.tag_9F45, "\x00\x00", 2); //Data Authentication Code
memset(currentcard.tag_9F4C,0x00,8); // ICC UN
memcpy(currentcard.tag_9F35,"\x12",1);
memcpy(currentcard.tag_9F34,"\x3F\x00\x00", 3); //CVM
iso14443a_setup(FPGA_HF_ISO14443A_READER_LISTEN);
LED_A_ON();
LED_B_OFF();
LED_C_OFF();
while(true) {
if(!iso14443a_select_card(uid, &hi14a_card, &cuid, true, 0)) {
if(MF_DBGLEVEL >= 1) Dbprintf("Can't select card");
break;
}
//copy UID and ATQA SAK and ATS values
memcpy(currentcard.UID, hi14a_card.uid, hi14a_card.uidlen);
currentcard.UID_len = hi14a_card.uidlen;
memcpy(currentcard.ATQA, hi14a_card.atqa, 2);
currentcard.SAK = (uint8_t)hi14a_card.sak;
memcpy(currentcard.ATS, hi14a_card.ats, hi14a_card.ats_len);
currentcard.ATS_len = hi14a_card.ats_len;
if(MF_DBGLEVEL >= 1){
Dbprintf("UID=");
Dbhexdump(currentcard.UID_len, currentcard.UID, false);
Dbprintf("ATQA=");
Dbhexdump(2, currentcard.ATQA,false);
Dbprintf("SAK=");
Dbhexdump(1, &currentcard.SAK,false);
Dbprintf("ATS=");
Dbhexdump(currentcard.ATS_len, currentcard.ATS,false);
}
EMVSelectPPSE();
//get response
if(resp[1] == 0x6F){ //decode template
decode_ber_tlv_item(&resp[1], &temptag);
//decode 84 and A5 tags
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
//decode the A5 tag
emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, &currentcard);
//decode the BF0C result, assuming 1 directory entry for now
if(currentcard.tag_BF0C_len !=0){
emv_decode_field(currentcard.tag_BF0C, currentcard.tag_BF0C_len, &currentcard);}
//retrieve the AID, use the AID to decide what transaction flow to use
if(currentcard.tag_61_len !=0){
emv_decode_field(currentcard.tag_61, currentcard.tag_61_len, &currentcard);}
}
//perform AID selection
EMVSelectAID(currentcard.tag_4F,currentcard.tag_4F_len, &currentcard);
if(resp[1] == 0x6F){ //decode template
decode_ber_tlv_item(&resp[1], &temptag);
//decode 84 and A5 tags
emv_decode_field(temptag.value, temptag.valuelength, &currentcard);
//decode the A5 tag
emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, &currentcard);
//decode the BF0C result, assuming 1 directory entry for now
}
//decode the AFL list and read records
//scan all card records
Dbprintf("Reading %u SFIs and %u records...", maxsfi, maxrecord);
for(uint8_t sfi = 1; sfi < maxsfi; sfi++){ //all possible SFI values
for(uint8_t record = 1; record < maxrecord; record++){
EMVReadRecord(record,sfi, &currentcard);
if(resp[1] == 0x70){
Dbprintf("Record Found! SFI=%u RECORD=%u", sfi, record);
}
}
}
Dbprintf("Reading finished");
LED_B_ON();
//output the sensitive data
cmd_send(CMD_ACK, 0, 0,0,resp,100);
LED_B_OFF();
break;
}
if(MF_DBGLEVEL >= 2) DbpString("EMV TRANSACTION FINISHED");
//finish up
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LEDsoff();
}
//SIMULATOR CODE
//-----------------------------------------------------------------------------
@@ -474,8 +755,8 @@ void SimulateEMVcard()
// Allocate 512 bytes for the dynamic modulation, created when the reader queries for it
// Such a response is less time critical, so we can prepare them on the fly
#define DYNAMIC_RESPONSE_BUFFER_SIZE 256 //max frame size
#define DYNAMIC_MODULATION_BUFFER_SIZE 2 + 9*DYNAMIC_RESPONSE_BUFFER_SIZE //(start and stop bit, 8 bit packet with 1 bit parity
#define DYNAMIC_RESPONSE_BUFFER_SIZE 64
#define DYNAMIC_MODULATION_BUFFER_SIZE 512
//uint8_t dynamic_response_buffer[DYNAMIC_RESPONSE_BUFFER_SIZE];
//uint8_t dynamic_modulation_buffer[DYNAMIC_MODULATION_BUFFER_SIZE];
@@ -698,25 +979,26 @@ void SimulateEMVcard()
if (p_response != NULL) {
EmSendCmd14443aRaw(p_response->modulation, p_response->modulation_n, receivedCmd[0] == 0x52);
// do the tracing for the previous reader request and this tag answer:
uint8_t par[MAX_PARITY_SIZE] = {0x00};
GetParity(p_response->response, p_response->response_n, par);
EmLogTrace(Uart.output,
Uart.len,
Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG,
Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG,
Uart.parity,
p_response->response,
p_response->response_n,
LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG,
(LastTimeProxToAirStart + p_response->ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG,
par);
}
if (!tracing) {
Dbprintf("Trace Full. Simulation stopped.");
break;
// EmLogTrace(Uart.output,
// Uart.len,
// Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG,
// Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG,
// Uart.parity,
// p_response->response,
// p_response->response_n,
// LastTimeProxToAirStart*16 + DELAY_ARM2AIR_AS_TAG,
// (LastTimeProxToAirStart + p_response->ProxToAirDuration)*16 + DELAY_ARM2AIR_AS_TAG,
// par);
}
// if (!tracing) {
// Dbprintf("Trace Full. Simulation stopped.");
// break;
// }
}
Dbprintf("%x %x %x", happened, happened2, cmdsRecvd);
@@ -725,3 +1007,108 @@ void SimulateEMVcard()
*/
}
//-----------------------------------------------------------------------------
// Main loop of simulated tag: receive commands from reader, decide what
// response to send, and send it.
//-----------------------------------------------------------------------------
void EMVFuzz_RATS(uint8_t ratslen, uint8_t* RATS)
{
int len;
uint8_t sak = 0x28;
//copy input rats into a buffer
uint8_t ratscmd[ratslen+2];
memcpy(ratscmd, RATS, ratslen);
// The first response contains the ATQA (note: bytes are transmitted in reverse order).
uint8_t atqa[2] = {0x04, 0x00};
// The second response contains the (mandatory) first 24 bits of the UID
uint8_t uid0[5] = {0x12,0x34,0x56,0x78,0x9A};
// Calculate the BitCountCheck (BCC) for the first 4 bytes of the UID.
uid0[4] = uid0[0] ^ uid0[1] ^ uid0[2] ^ uid0[3];
// Prepare the mandatory SAK (for 4 and 7 byte UID)
uint8_t sakresponse[3];
sakresponse[0] = sak;
ComputeCrc14443(CRC_14443_A, sakresponse, 1, &sakresponse[1], &sakresponse[2]);
// Prepare the optional second SAK (for 7 byte UID), drop the cascade bit
uint8_t ACK1[] = {0xa3,0x6f,0xc6}; //ACK packets
uint8_t ACK2[] = {0xa2,0x00,0x00};
AppendCrc14443a(ACK2, 1);
AppendCrc14443a(ratscmd, sizeof(ratscmd)-2);
//handle the PPS selection
uint8_t PPSR[3] = {0xD0,0x00,0x00};
AppendCrc14443a(PPSR, 1);
//#define TAG_RESPONSE_COUNT 9
tag_response_info_t responses[7] = {
{ .response = atqa, .response_n = sizeof(atqa) }, // Answer to request - respond with card type
{ .response = uid0, .response_n = sizeof(uid0) }, // Anticollision cascade1 - respond with uid
{ .response = sakresponse, .response_n = sizeof(sakresponse) }, // Acknowledge select - cascade 1
{ .response = ratscmd, .response_n = sizeof(ratscmd) }, // dummy ATS (pseudo-ATR), answer to RATS
{ .response = ACK1, .response_n = sizeof(ACK1) }, // dummy ATS (pseudo-ATR), answer to RATS
{ .response = ACK2, .response_n = sizeof(ACK2) }, // dummy ATS (pseudo-ATR), answer to RATS
{ .response = PPSR, .response_n = sizeof(PPSR) }, // dummy ATS (pseudo-ATR), answer to RATS
};
// Reset the offset pointer of the free buffer
//reset_free_buffer();
// Prepare the responses of the anticollision phase
// there will be not enough time to do this at the moment the reader sends it REQA
for (size_t i=0; i<7; i++) {
prepare_allocated_tag_modulation(&responses[i]);
}
uint8_t *receivedCmd = BigBuf_malloc(MAX_FRAME_SIZE);
uint8_t *receivedCmdPar = BigBuf_malloc(MAX_PARITY_SIZE);
// To control where we are in the protocol
int order;
// We need to listen to the high-frequency, peak-detected path.
iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
tag_response_info_t* p_response;
LED_C_ON();
// Clean receive command buffer
for(;;){
if (!GetIso14443aCommandFromReader(receivedCmd, receivedCmdPar, &len)){
break;
}
p_response = NULL;
if ((receivedCmd[0] == 0x26) || (receivedCmd[0] == 0x52)) { // Received a REQUEST
p_response = &responses[0]; order = 1;
}
if (receivedCmd[1] == 0x20 && receivedCmd[0] == 0x93) { // Received request for UID (cascade 1)
p_response = &responses[1]; order = 2; //send the UID
}
if (receivedCmd[1] == 0x70 && receivedCmd[0] == 0x93) { // Received a SELECT (cascade 1)
p_response = &responses[2]; order = 3; //send the SAK
}
if (receivedCmd[0] == 0xD0) { // Received a PPS request
p_response = &responses[6]; order = 70;
}
if (receivedCmd[0] == 0xE0) { // Received a RATS request
p_response = &responses[3]; order = 70;
EmSendCmd14443aRaw(p_response->modulation, p_response->modulation_n, (receivedCmd[0] == 0x52) || (receivedCmd[0] == 0x26));
break;
}
if (p_response != NULL){
EmSendCmd14443aRaw(p_response->modulation, p_response->modulation_n, (receivedCmd[0] == 0x52) || (receivedCmd[0] == 0x26));
} else {
break;
}
}
if (order && (MF_DBGLEVEL >= 2)) DbpString("just using order vars");
FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
LED_C_OFF();
return;
}