X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/a9eeb576983f932ee622554ccd4e08be10e695b5..99136c6eefdc8f1bba10ece22572e471b6deebb1:/armsrc/emvcmd.c diff --git a/armsrc/emvcmd.c b/armsrc/emvcmd.c index 4b9e6785..217ded54 100644 --- a/armsrc/emvcmd.c +++ b/armsrc/emvcmd.c @@ -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,¤tcard,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,¤tcard,currentcard.tag_6F ,¤tcard.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, ¤tcard); } -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, ¤tcard); - // decode the A5 tag - if(currentcard.tag_A5_len > 0) - emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, ¤tcard); + 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, ¤tcard); + + // decode the A5 tag + if(currentcard.tag_A5_len > 0) + emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, ¤tcard); - // 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, ¤tcard);} - // 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, ¤tcard);} + // 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, ¤tcard);} + + // 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, ¤tcard); + } + 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; - } - 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; - } + 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, ¤tcard); + + 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, ¤tcard); + //decode the A5 tag + emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, ¤tcard); + //decode the BF0C result, assuming 1 directory entry for now + //retrieve the AID } - - EMVSelectAID(currentcard.tag_4F,currentcard.tag_4F_len, ¤tcard); // 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, ¤tcard, pdolcommand, &pdolcommandlen); + } else { + pdolcommandlen = 0; } - Dbhexdump(pdolcommandlen, pdolcommand,false); - if(!EMVGetProcessingOptions(pdolcommand,pdolcommandlen, ¤tcard)) { + if(!EMVGetProcessingOptions(pdolcommand, pdolcommandlen, ¤tcard)) { 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, ¤tcard); + } + 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, ¤tcard); - // while(responsebuffer[0] == 0xF2) { - // EMVReadRecord(j,sfi, ¤tcard); - // } - } - i++; - } - } - else { - EMVReadRecord(1,1,¤tcard); - EMVReadRecord(1,2,¤tcard); - EMVReadRecord(1,3,¤tcard); - EMVReadRecord(2,1,¤tcard); - EMVReadRecord(2,2,¤tcard); - EMVReadRecord(2,3,¤tcard); - EMVReadRecord(3,1,¤tcard); - EMVReadRecord(3,3,¤tcard); - EMVReadRecord(4,2,¤tcard); + + //record, sfi + EMVReadRecord(1,1,¤tcard); + Dbhexdump(200, resp, false); + EMVReadRecord(2,1,¤tcard); + Dbhexdump(200, resp,false); + EMVReadRecord( 1,2, ¤tcard); + Dbhexdump(200, resp,false); + EMVReadRecord(2,2,¤tcard); + Dbhexdump(200, resp,false); + EMVReadRecord( 3,2, ¤tcard); + Dbhexdump(200, resp,false); + EMVReadRecord( 4,2, ¤tcard); + Dbhexdump(200, resp,false); + EMVReadRecord( 1,3, ¤tcard); + Dbhexdump(200, resp,false); + EMVReadRecord(2,3,¤tcard); + Dbhexdump(200, resp,false); + EMVReadRecord(4,2,¤tcard); + EMVReadRecord( 1,3, ¤tcard); + Dbhexdump(200, resp,false); + + //DDA supported, so read more records + if((currentcard.tag_82[0] & AIP_CDA_SUPPORTED) == AIP_CDA_SUPPORTED){ + EMVReadRecord( 1,4, ¤tcard); + EMVReadRecord( 2,4, ¤tcard); } - // EMVGetChallenge(¤tcard); - // memcpy(currentcard.tag_9F4C,&responsebuffer[1],8); // ICC UN - EMVGenerateAC(0x81,¤tcard); - 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(¤tcard); + + 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, ¤tcard, cdolcommand, &cdolcommandlen); + } else { + cdolcommandlen = 0; + } + Dbhexdump(currentcard.tag_8C_len, currentcard.tag_8C,false); + Dbhexdump(cdolcommandlen, cdolcommand,false); + + EMVGenerateAC(0x41, ¤tcard); + + 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, ¤tcard); + 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, ¤tcard); + //decode the A5 tag + emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, ¤tcard); + //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, ¤tcard, pdolcommand, &pdolcommandlen); + } else { + pdolcommandlen = 0; } if(EMVGetProcessingOptions(pdolcommand,pdolcommandlen, ¤tcard)) { 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, ¤tcard); + } + 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, ¤tcard); - // while(responsebuffer[0] == 0xF2) { - // EMVReadRecord(j,sfi, ¤tcard); - // } - } - i++; + + //record, sfi + EMVReadRecord( 1,1, ¤tcard); + EMVReadRecord( 1,2, ¤tcard); + EMVReadRecord( 1,3, ¤tcard); + EMVReadRecord( 2,3, ¤tcard); + + //DDA supported, so read more records + if((currentcard.tag_82[0] & AIP_CDA_SUPPORTED) == AIP_CDA_SUPPORTED){ + EMVReadRecord( 1,4, ¤tcard); + EMVReadRecord( 2,4, ¤tcard); } + + /* 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(¤tcard); - //memcpy(currentcard.tag_9F4C,&responsebuffer[1],8); // ICC UN - EMVGenerateAC(0x80,¤tcard); - + memcpy(currentcard.tag_9F4C, &resp[1],8); // ICC UN + + if(currentcard.tag_8C_len > 0) { + emv_generateDOL(currentcard.tag_8C, currentcard.tag_8C_len, ¤tcard, cdolcommand, &cdolcommandlen); + } else { + cdolcommandlen = 0; + } + EMVGenerateAC(0x80, ¤tcard); + + if(resp[1] == 0x77) //format 2 data field returned + { + decode_ber_tlv_item(&resp[1], &temptag); + emv_decode_field(temptag.value, temptag.valuelength, ¤tcard); + } // generate AC2 - // if(currentcard.tag_8D_len > 0) { - // emv_generateDOL(currentcard.tag_8D, currentcard.tag_8D_len, ¤tcard, cdolcommand, &cdolcommandlen); } - // else{ - // //cdolcommand = NULL; //cdol val is null - // cdolcommandlen = 0; - // } - // emv_generateAC(0x80, cdolcommand,cdolcommandlen, ¤tcard); + if(currentcard.tag_8D_len > 0) { + emv_generateDOL(currentcard.tag_8D, currentcard.tag_8D_len, ¤tcard, cdolcommand, &cdolcommandlen); } + else{ + //cdolcommand = NULL; //cdol val is null + cdolcommandlen = 0; + } + + EMVGenerateAC(0x80, ¤tcard); - // if(responsebuffer[1] == 0x77) //format 2 data field returned - // { - // decode_ber_tlv_item(&responsebuffer[1], &temptag); - // emv_decode_field(temptag.value, temptag.valuelength, ¤tcard); - // } + if(resp[1] == 0x77) //format 2 data field returned + { + decode_ber_tlv_item(&resp[1], &temptag); + emv_decode_field(temptag.value, temptag.valuelength, ¤tcard); + } } // 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, ¤tcard); - // } + 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, ¤tcard); + } 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(¤tcard, 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, ¤tcard); //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, ¤tcard); + //decode the A5 tag + emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, ¤tcard); + //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, ¤tcard);} + //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, ¤tcard);} + } 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(¤tcard); } + +//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(¤tcard, 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, ¤tcard.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, ¤tcard); + //decode the A5 tag + emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, ¤tcard); + //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, ¤tcard);} + //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, ¤tcard);} + } + //perform AID selection + EMVSelectAID(currentcard.tag_4F,currentcard.tag_4F_len, ¤tcard); + 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, ¤tcard); + //decode the A5 tag + emv_decode_field(currentcard.tag_A5, currentcard.tag_A5_len, ¤tcard); + //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, ¤tcard); + 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; +}