//----------------------------------------------------------------------------- // Copyright (C) 2017 Merlok // // This code is licensed to you under the terms of the GNU GPL, version 2 or, // at your option, any later version. See the LICENSE.txt file for the text of // the license. //----------------------------------------------------------------------------- // EMV core functions //----------------------------------------------------------------------------- #include "emvcore.h" // Got from here. Thanks) // https://eftlab.co.uk/index.php/site-map/knowledge-base/211-emv-aid-rid-pix static const char *PSElist [] = { "325041592E5359532E4444463031", // 2PAY.SYS.DDF01 - Visa Proximity Payment System Environment - PPSE "315041592E5359532E4444463031" // 1PAY.SYS.DDF01 - Visa Payment System Environment - PSE }; static const size_t PSElistLen = sizeof(PSElist)/sizeof(char*); typedef struct { enum CardPSVendor vendor; const char* aid; } TAIDList; static const TAIDList AIDlist [] = { // Visa International { CV_VISA, "A00000000305076010"}, // VISA ELO Credit { CV_VISA, "A0000000031010" }, // VISA Debit/Credit (Classic) { CV_VISA, "A000000003101001" }, // VISA Credit { CV_VISA, "A000000003101002" }, // VISA Debit { CV_VISA, "A0000000032010" }, // VISA Electron { CV_VISA, "A0000000032020" }, // VISA { CV_VISA, "A0000000033010" }, // VISA Interlink { CV_VISA, "A0000000034010" }, // VISA Specific { CV_VISA, "A0000000035010" }, // VISA Specific { CV_VISA, "A0000000036010" }, // Domestic Visa Cash Stored Value { CV_VISA, "A0000000036020" }, // International Visa Cash Stored Value { CV_VISA, "A0000000038002" }, // VISA Auth, VisaRemAuthen EMV-CAP (DPA) { CV_VISA, "A0000000038010" }, // VISA Plus { CV_VISA, "A0000000039010" }, // VISA Loyalty { CV_VISA, "A000000003999910" }, // VISA Proprietary ATM // Visa USA { CV_VISA, "A000000098" }, // Debit Card { CV_VISA, "A0000000980848" }, // Debit Card // Mastercard International { CV_MASTERCARD, "A00000000401" }, // MasterCard PayPass { CV_MASTERCARD, "A0000000041010" }, // MasterCard Credit { CV_MASTERCARD, "A00000000410101213" }, // MasterCard Credit { CV_MASTERCARD, "A00000000410101215" }, // MasterCard Credit { CV_MASTERCARD, "A0000000042010" }, // MasterCard Specific { CV_MASTERCARD, "A0000000043010" }, // MasterCard Specific { CV_MASTERCARD, "A0000000043060" }, // Maestro (Debit) { CV_MASTERCARD, "A000000004306001" }, // Maestro (Debit) { CV_MASTERCARD, "A0000000044010" }, // MasterCard Specific { CV_MASTERCARD, "A0000000045010" }, // MasterCard Specific { CV_MASTERCARD, "A0000000046000" }, // Cirrus { CV_MASTERCARD, "A0000000048002" }, // SecureCode Auth EMV-CAP { CV_MASTERCARD, "A0000000049999" }, // MasterCard PayPass // American Express { CV_AMERICANEXPRESS, "A000000025" }, { CV_AMERICANEXPRESS, "A0000000250000" }, { CV_AMERICANEXPRESS, "A00000002501" }, { CV_AMERICANEXPRESS, "A000000025010402" }, { CV_AMERICANEXPRESS, "A000000025010701" }, { CV_AMERICANEXPRESS, "A000000025010801" }, // Groupement des Cartes Bancaires "CB" { CV_CB, "A0000000421010" }, // Cartes Bancaire EMV Card { CV_CB, "A0000000422010" }, { CV_CB, "A0000000423010" }, { CV_CB, "A0000000424010" }, { CV_CB, "A0000000425010" }, // JCB CO., LTD. { CV_JCB, "A00000006510" }, // JCB { CV_JCB, "A0000000651010" }, // JCB J Smart Credit // Other { CV_OTHER, "A0000001544442" }, // Banricompras Debito - Banrisul - Banco do Estado do Rio Grande do SUL - S.A. { CV_OTHER, "F0000000030001" }, // BRADESCO { CV_OTHER, "A0000005241010" }, // RuPay - RuPay { CV_OTHER, "D5780000021010" } // Bankaxept - Bankaxept }; static const size_t AIDlistLen = sizeof(AIDlist)/sizeof(TAIDList); static bool APDULogging = false; void SetAPDULogging(bool logging) { APDULogging = logging; } enum CardPSVendor GetCardPSVendor(uint8_t * AID, size_t AIDlen) { char buf[100] = {0}; if (AIDlen < 1) return CV_NA; hex_to_buffer((uint8_t *)buf, AID, AIDlen, sizeof(buf) - 1, 0, 0, true); for(int i = 0; i < AIDlistLen; i ++) { if (strncmp(AIDlist[i].aid, buf, strlen(AIDlist[i].aid)) == 0){ return AIDlist[i].vendor; } } return CV_NA; } static bool print_cb(void *data, const struct tlv *tlv, int level, bool is_leaf) { emv_tag_dump(tlv, stdout, level); if (is_leaf) { dump_buffer(tlv->value, tlv->len, stdout, level); } return true; } void TLVPrintFromBuffer(uint8_t *data, int datalen) { struct tlvdb *t = NULL; t = tlvdb_parse_multi(data, datalen); if (t) { PrintAndLog("-------------------- TLV decoded --------------------"); tlvdb_visit(t, print_cb, NULL, 0); tlvdb_free(t); } else { PrintAndLog("TLV ERROR: Can't parse response as TLV tree."); } } void TLVPrintFromTLVLev(struct tlvdb *tlv, int level) { if (!tlv) return; tlvdb_visit(tlv, print_cb, NULL, level); } void TLVPrintFromTLV(struct tlvdb *tlv) { TLVPrintFromTLVLev(tlv, 0); } void TLVPrintAIDlistFromSelectTLV(struct tlvdb *tlv) { PrintAndLog("|------------------|--------|-------------------------|"); PrintAndLog("| AID |Priority| Name |"); PrintAndLog("|------------------|--------|-------------------------|"); struct tlvdb *ttmp = tlvdb_find(tlv, 0x6f); if (!ttmp) PrintAndLog("| none |"); while (ttmp) { const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x84, NULL); const struct tlv *tgName = tlvdb_get_inchild(ttmp, 0x50, NULL); const struct tlv *tgPrio = tlvdb_get_inchild(ttmp, 0x87, NULL); if (!tgAID) break; PrintAndLog("|%s| %s |%s|", sprint_hex_inrow_ex(tgAID->value, tgAID->len, 18), (tgPrio) ? sprint_hex(tgPrio->value, 1) : " ", (tgName) ? sprint_ascii_ex(tgName->value, tgName->len, 25) : " "); ttmp = tlvdb_find_next(ttmp, 0x6f); } PrintAndLog("|------------------|--------|-------------------------|"); } struct tlvdb *GetPANFromTrack2(const struct tlv *track2) { char track2Hex[200] = {0}; uint8_t PAN[100] = {0}; int PANlen = 0; char *tmp = track2Hex; if (!track2) return NULL; for (int i = 0; i < track2->len; ++i, tmp += 2) sprintf(tmp, "%02x", (unsigned int)track2->value[i]); int posD = strchr(track2Hex, 'd') - track2Hex; if (posD < 1) return NULL; track2Hex[posD] = 0; if (strlen(track2Hex) % 2) { track2Hex[posD] = 'F'; track2Hex[posD + 1] = '\0'; } param_gethex_to_eol(track2Hex, 0, PAN, sizeof(PAN), &PANlen); return tlvdb_fixed(0x5a, PANlen, PAN); } struct tlvdb *GetdCVVRawFromTrack2(const struct tlv *track2) { char track2Hex[200] = {0}; char dCVVHex[100] = {0}; uint8_t dCVV[100] = {0}; int dCVVlen = 0; const int PINlen = 5; // must calculated from 9F67 MSD Offset but i have not seen this tag) char *tmp = track2Hex; if (!track2) return NULL; for (int i = 0; i < track2->len; ++i, tmp += 2) sprintf(tmp, "%02x", (unsigned int)track2->value[i]); int posD = strchr(track2Hex, 'd') - track2Hex; if (posD < 1) return NULL; memset(dCVVHex, '0', 32); // ATC memcpy(dCVVHex + 0, track2Hex + posD + PINlen + 11, 4); // PAN 5 hex memcpy(dCVVHex + 4, track2Hex, 5); // expire date memcpy(dCVVHex + 9, track2Hex + posD + 1, 4); // service code memcpy(dCVVHex + 13, track2Hex + posD + 5, 3); param_gethex_to_eol(dCVVHex, 0, dCVV, sizeof(dCVV), &dCVVlen); return tlvdb_fixed(0x02, dCVVlen, dCVV); } int EMVExchangeEx(bool ActivateField, bool LeaveFieldON, sAPDU apdu, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) { uint8_t data[APDU_RES_LEN] = {0}; *ResultLen = 0; if (sw) *sw = 0; uint16_t isw = 0; if (ActivateField) DropField(); // COMPUTE APDU memcpy(data, &apdu, 5); if (apdu.data) memcpy(&data[5], apdu.data, apdu.Lc); if (APDULogging) PrintAndLog(">>>> %s", sprint_hex(data, 6 + apdu.Lc)); // 6 byes + data = INS + CLA + P1 + P2 + Lc + + Le int res = ExchangeAPDU14a(data, 6 + apdu.Lc, ActivateField, LeaveFieldON, Result, (int)MaxResultLen, (int *)ResultLen); if (APDULogging) PrintAndLog("<<<< %s", sprint_hex(Result, *ResultLen)); if (res) { return res; } *ResultLen -= 2; isw = Result[*ResultLen] * 0x0100 + Result[*ResultLen + 1]; if (sw) *sw = isw; if (isw != 0x9000) { if (APDULogging) PrintAndLog("APDU(%02x%02x) ERROR: [%4X] %s", apdu.CLA, apdu.INS, isw, GetAPDUCodeDescription(*sw >> 8, *sw & 0xff)); return 5; } // add to tlv tree if (tlv) { struct tlvdb *t = tlvdb_parse_multi(Result, *ResultLen); tlvdb_add(tlv, t); } return 0; } int EMVExchange(bool LeaveFieldON, sAPDU apdu, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) { return EMVExchangeEx(false, LeaveFieldON, apdu, Result, MaxResultLen, ResultLen, sw, tlv); } int EMVSelect(bool ActivateField, bool LeaveFieldON, uint8_t *AID, size_t AIDLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) { return EMVExchangeEx(ActivateField, LeaveFieldON, (sAPDU){0x00, 0xa4, 0x04, 0x00, AIDLen, AID}, Result, MaxResultLen, ResultLen, sw, tlv); } int EMVSelectPSE(bool ActivateField, bool LeaveFieldON, uint8_t PSENum, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw) { uint8_t buf[APDU_AID_LEN] = {0}; *ResultLen = 0; int len = 0; int res = 0; switch (PSENum) { case 1: param_gethex_to_eol(PSElist[1], 0, buf, sizeof(buf), &len); break; case 2: param_gethex_to_eol(PSElist[0], 0, buf, sizeof(buf), &len); break; default: return -1; } // select res = EMVSelect(ActivateField, LeaveFieldON, buf, len, Result, MaxResultLen, ResultLen, sw, NULL); return res; } int EMVSearchPSE(bool ActivateField, bool LeaveFieldON, bool decodeTLV, struct tlvdb *tlv) { uint8_t data[APDU_RES_LEN] = {0}; size_t datalen = 0; uint16_t sw = 0; int res; // select PPSE res = EMVSelectPSE(ActivateField, true, 2, data, sizeof(data), &datalen, &sw); if (!res){ struct tlvdb *t = NULL; t = tlvdb_parse_multi(data, datalen); if (t) { int retrycnt = 0; struct tlvdb *ttmp = tlvdb_find_path(t, (tlv_tag_t[]){0x6f, 0xa5, 0xbf0c, 0x61, 0x00}); if (!ttmp) PrintAndLog("PPSE don't have records."); while (ttmp) { const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x4f, NULL); if (tgAID) { res = EMVSelect(false, true, (uint8_t *)tgAID->value, tgAID->len, data, sizeof(data), &datalen, &sw, tlv); // retry if error and not returned sw error if (res && res != 5) { if (++retrycnt < 3){ continue; } else { // card select error, proxmark error if (res == 1) { PrintAndLog("Exit..."); return 1; } retrycnt = 0; PrintAndLog("Retry failed [%s]. Skiped...", sprint_hex_inrow(tgAID->value, tgAID->len)); } // next element ttmp = tlvdb_find_next(ttmp, 0x61); continue; } retrycnt = 0; // all is ok if (decodeTLV){ PrintAndLog("%s:", sprint_hex_inrow(tgAID->value, tgAID->len)); TLVPrintFromBuffer(data, datalen); } } ttmp = tlvdb_find_next(ttmp, 0x61); } tlvdb_free(t); } else { PrintAndLog("PPSE ERROR: Can't get TLV from response."); } } else { PrintAndLog("PPSE ERROR: Can't select PPSE AID. Error: %d", res); } if(!LeaveFieldON) DropField(); return res; } int EMVSearch(bool ActivateField, bool LeaveFieldON, bool decodeTLV, struct tlvdb *tlv) { uint8_t aidbuf[APDU_AID_LEN] = {0}; int aidlen = 0; uint8_t data[APDU_RES_LEN] = {0}; size_t datalen = 0; uint16_t sw = 0; int res = 0; int retrycnt = 0; for(int i = 0; i < AIDlistLen; i ++) { param_gethex_to_eol(AIDlist[i].aid, 0, aidbuf, sizeof(aidbuf), &aidlen); res = EMVSelect((i == 0) ? ActivateField : false, (i == AIDlistLen - 1) ? LeaveFieldON : true, aidbuf, aidlen, data, sizeof(data), &datalen, &sw, tlv); // retry if error and not returned sw error if (res && res != 5) { if (++retrycnt < 3){ i--; } else { // card select error, proxmark error if (res == 1) { PrintAndLog("Exit..."); return 1; } retrycnt = 0; PrintAndLog("Retry failed [%s]. Skiped...", AIDlist[i].aid); } continue; } retrycnt = 0; if (res) continue; if (decodeTLV){ PrintAndLog("%s:", AIDlist[i].aid); TLVPrintFromBuffer(data, datalen); } } return 0; } int EMVSelectApplication(struct tlvdb *tlv, uint8_t *AID, size_t *AIDlen) { // check priority. 0x00 - highest int prio = 0xffff; *AIDlen = 0; struct tlvdb *ttmp = tlvdb_find(tlv, 0x6f); if (!ttmp) return 1; while (ttmp) { const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x84, NULL); const struct tlv *tgPrio = tlvdb_get_inchild(ttmp, 0x87, NULL); if (!tgAID) break; if (tgPrio) { int pt = bytes_to_num((uint8_t*)tgPrio->value, (tgPrio->len < 2) ? tgPrio->len : 2); if (pt < prio) { prio = pt; memcpy(AID, tgAID->value, tgAID->len); *AIDlen = tgAID->len; } } else { // takes the first application from list wo priority if (!*AIDlen) { memcpy(AID, tgAID->value, tgAID->len); *AIDlen = tgAID->len; } } ttmp = tlvdb_find_next(ttmp, 0x6f); } return 0; } int EMVGPO(bool LeaveFieldON, uint8_t *PDOL, size_t PDOLLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) { return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0xa8, 0x00, 0x00, PDOLLen, PDOL}, Result, MaxResultLen, ResultLen, sw, tlv); } int EMVReadRecord(bool LeaveFieldON, uint8_t SFI, uint8_t SFIrec, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) { return EMVExchange(LeaveFieldON, (sAPDU){0x00, 0xb2, SFIrec, (SFI << 3) | 0x04, 0, NULL}, Result, MaxResultLen, ResultLen, sw, tlv); } int EMVAC(bool LeaveFieldON, uint8_t RefControl, uint8_t *CDOL, size_t CDOLLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) { return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0xae, RefControl, 0x00, CDOLLen, CDOL}, Result, MaxResultLen, ResultLen, sw, tlv); } int EMVGenerateChallenge(bool LeaveFieldON, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) { return EMVExchange(LeaveFieldON, (sAPDU){0x00, 0x84, 0x00, 0x00, 0x00, NULL}, Result, MaxResultLen, ResultLen, sw, tlv); } int MSCComputeCryptoChecksum(bool LeaveFieldON, uint8_t *UDOL, uint8_t UDOLlen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) { return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0x2a, 0x8e, 0x80, UDOLlen, UDOL}, Result, MaxResultLen, ResultLen, sw, tlv); }