github/RRG-Proxmark3
1
0
Fork 0
mirror of https://github.com/RfidResearchGroup/proxmark3.git synced 2025-08-14 18:48:13 -07:00
Code Issues Projects Releases Packages Wiki Activity Actions

CHG: EMV changes. https://github.com/Proxmark/proxmark3/pull/493 [@merlokk)

Browse source
This commit is contained in:
iceman1001 2017-12-02 18:58:33 +01:00
commit eb0c0c364c
6 changed files with 480 additions and 202 deletions
Download patch file Download diff file Expand all files Collapse all files

161
client/emv/cmdemv.c
View file

@ -402,12 +402,12 @@ int CmdHFEMVExec(const char *cmd) {
TLVPrintFromBuffer(buf, len);
PrintAndLog("* Selected.");
PrintAndLog("-----BREAK.");
return 0;
PrintAndLog("\n* Init transaction parameters.");
//9F66:(Terminal Transaction Qualifiers (TTQ)) len:4
TLV_ADD(0x9F66, "\x26\x00\x00\x00"); // E6
TLV_ADD(0x9F66, "\x86\x00\x00\x00"); // MSD
// TLV_ADD(0x9F66, "\x26\x00\x00\x00"); // qVSDC
// TLV_ADD(0x9F66, "\x8e\x00\x00\x00"); // CDA
//9F02:(Amount, Authorised (Numeric)) len:6
TLV_ADD(0x9F02, "\x00\x00\x00\x00\x01\x00");
//9F1A:(Terminal Country Code) len:2
@ -421,8 +421,10 @@ return 0;
TLV_ADD(0x9C, "\x00");
// 9F37 Unpredictable Number len:4
TLV_ADD(0x9F37, "\x01\x02\x03\x04");
// 9F6A Unpredictable Number (MSD for UDOL) len:4
TLV_ADD(0x9F6A, "\x01\x02\x03\x04");
TLVPrintFromTLV(tlvRoot);
TLVPrintFromTLV(tlvRoot); // TODO delete!!!
PrintAndLog("\n* Calc PDOL.");
struct tlv *pdol_data_tlv = dol_process(tlvdb_get(tlvRoot, 0x9f38, NULL), tlvRoot, 0x83);
@ -439,8 +441,6 @@ return 0;
}
PrintAndLog("PDOL data[%d]: %s", pdol_data_tlv_data_len, sprint_hex(pdol_data_tlv_data, pdol_data_tlv_data_len));
//PrintAndLog("-----BREAK.");
//return 0;
PrintAndLog("\n* GPO.");
res = EMVGPO(true, pdol_data_tlv_data, pdol_data_tlv_data_len, buf, sizeof(buf), &len, &sw, tlvRoot);
@ -453,21 +453,49 @@ return 0;
// process response template format 1 [id:80 2b AIP + x4b AFL] and format 2 [id:77 TLV]
if (buf[0] == 0x80) {
if (decodeTLV){
PrintAndLog("GPO response format1:");
TLVPrintFromBuffer(buf, len);
}
if (len < 4 || (len - 4) % 4) {
PrintAndLog("ERROR: GPO response format1 parsing error. length=%d", len);
} else {
// AIP
struct tlvdb * f1AIP = tlvdb_fixed(0x82, 2, buf + 2);
tlvdb_add(tlvRoot, f1AIP);
if (decodeTLV){
PrintAndLog("\n* * Decode response format 1 (0x80) AIP and AFL:");
TLVPrintFromTLV(f1AIP);
}
// AFL
struct tlvdb * f1AFL = tlvdb_fixed(0x94, len - 4, buf + 2 + 2);
tlvdb_add(tlvRoot, f1AFL);
if (decodeTLV)
TLVPrintFromTLV(f1AFL);
}
} else {
if (decodeTLV)
TLVPrintFromBuffer(buf, len);
}
// extract PAN from track2
{
const struct tlv *track2 = tlvdb_get(tlvRoot, 0x57, NULL);
if (!tlvdb_get(tlvRoot, 0x5a, NULL) && track2 && track2->len >= 8) {
struct tlvdb *pan = GetPANFromTrack2(track2);
if (pan) {
tlvdb_add(tlvRoot, pan);
const struct tlv *pantlv = tlvdb_get(tlvRoot, 0x5a, NULL);
PrintAndLog("\n* * Extracted PAN from track2: %s", sprint_hex(pantlv->value, pantlv->len));
} else {
PrintAndLog("\n* * WARNING: Can't extract PAN from track2.");
}
}
}
PrintAndLog("\n* Read records from AFL.");
const struct tlv *AFL = tlvdb_get(tlvRoot, 0x94, NULL);
if (!AFL || !AFL->len) {
@ -516,7 +544,114 @@ return 0;
break;
}
// additional contacless EMV commands (fDDA, CDA, external authenticate)
// transaction check
const struct tlv *AIPtlv = tlvdb_get(tlvRoot, 0x82, NULL);
uint16_t AIP = AIPtlv->value[0] + AIPtlv->value[1] * 0x100;
PrintAndLog("* * AIP=%x", AIP);
// qVSDC
{
// 9F26: Application Cryptogram
const struct tlv *AC = tlvdb_get(tlvRoot, 0x9F26, NULL);
if (AC) {
PrintAndLog("\n--> qVSDC transaction.");
PrintAndLog("* AC path");
// 9F36: Application Transaction Counter (ATC)
const struct tlv *ATC = tlvdb_get(tlvRoot, 0x9F36, NULL);
if (ATC) {
// 9F10: Issuer Application Data - optional
const struct tlv *IAD = tlvdb_get(tlvRoot, 0x9F10, NULL);
// print AC data
PrintAndLog("ATC: %s", sprint_hex(ATC->value, ATC->len));
PrintAndLog("AC: %s", sprint_hex(AC->value, AC->len));
if (IAD){
PrintAndLog("IAD: %s", sprint_hex(IAD->value, IAD->len));
if (IAD->len >= IAD->value[0] + 1) {
PrintAndLog("\tKey index: 0x%02x", IAD->value[1]);
PrintAndLog("\tCrypto ver: 0x%02x(%03d)", IAD->value[2], IAD->value[2]);
PrintAndLog("\tCVR:", sprint_hex(&IAD->value[3], IAD->value[0] - 2));
struct tlvdb * cvr = tlvdb_fixed(0x20, IAD->value[0] - 2, &IAD->value[3]);
TLVPrintFromTLVLev(cvr, 1);
}
} else {
PrintAndLog("WARNING: IAD not found.");
}
} else {
PrintAndLog("ERROR AC: Application Transaction Counter (ATC) not found.");
}
}
}
// TODO: Mastercard M/CHIP
{
const struct tlv *CDOL1 = tlvdb_get(tlvRoot, 0x8c, NULL);
if (CDOL1 && GetCardPSVendor(AID, AIDlen) == CV_MASTERCARD) { // and m/chip transaction flag
}
}
// MSD
if (AIP & 0x8000) {
PrintAndLog("\n--> MSD transaction.");
PrintAndLog("* MSD dCVV path. Check dCVV");
const struct tlv *track2 = tlvdb_get(tlvRoot, 0x57, NULL);
if (track2) {
PrintAndLog("Track2: %s", sprint_hex(track2->value, track2->len));
struct tlvdb *dCVV = GetdCVVRawFromTrack2(track2);
PrintAndLog("dCVV raw data:");
TLVPrintFromTLV(dCVV);
if (GetCardPSVendor(AID, AIDlen) == CV_MASTERCARD) {
PrintAndLog("\n* Mastercard calculate UDOL");
// UDOL (9F69)
const struct tlv *UDOL = tlvdb_get(tlvRoot, 0x9F69, NULL);
// UDOL(9F69) default: 9F6A (Unpredictable number) 4 bytes
const struct tlv defUDOL = {
.tag = 0x01,
.len = 3,
.value = (uint8_t *)"\x9f\x6a\x04",
};
if (!UDOL)
PrintAndLog("Use default UDOL.");
struct tlv *udol_data_tlv = dol_process(UDOL ? UDOL : &defUDOL, tlvRoot, 0x01); // 0x01 - fake tag!
if (!udol_data_tlv){
PrintAndLog("ERROR: can't create UDOL TLV.");
return 4;
}
PrintAndLog("UDOL data[%d]: %s", udol_data_tlv->len, sprint_hex(udol_data_tlv->value, udol_data_tlv->len));
PrintAndLog("\n* Mastercard compute cryptographic checksum(UDOL)");
res = MSCComputeCryptoChecksum(true, (uint8_t *)udol_data_tlv->value, udol_data_tlv->len, buf, sizeof(buf), &len, &sw, tlvRoot);
if (res) {
PrintAndLog("ERROR Compute Crypto Checksum. APDU error %4x", sw);
return 5;
}
if (decodeTLV) {
TLVPrintFromBuffer(buf, len);
PrintAndLog("");
}
}
} else {
PrintAndLog("ERROR MSD: Track2 data not found.");
}
}
// additional contacless EMV commands (fDDA, external authenticate)
// DropField