+ // 9F4B: Signed Dynamic Application Data
+ const struct tlv *sdad_tlv = tlvdb_get(tlv, 0x9f4b, NULL);
+ // DDA with internal authenticate OR fDDA with filled 0x9F4B tag (GPO result)
+ // EMV kernel3 v2.4, contactless book C-3, C.1., page 147
+ if (sdad_tlv) {
+ PrintAndLog("\n* * Got Signed Dynamic Application Data (9F4B) form GPO. Maybe fDDA...");
+
+ const struct tlvdb *atc_db = emv_pki_recover_atc_ex(icc_pk, tlv, true);
+ if (!atc_db) {
+ PrintAndLog("ERROR: Can't recover IDN (ICC Dynamic Number)");
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ emv_pk_free(icc_pk);
+ return 8;
+ }
+
+ // 9f36 Application Transaction Counter (ATC)
+ const struct tlv *atc_tlv = tlvdb_get(atc_db, 0x9f36, NULL);
+ if(atc_tlv) {
+ PrintAndLog("\nATC (Application Transaction Counter) [%zu] %s", atc_tlv->len, sprint_hex_inrow(atc_tlv->value, atc_tlv->len));
+
+ const struct tlv *core_atc_tlv = tlvdb_get(tlv, 0x9f36, NULL);
+ if(tlv_equal(core_atc_tlv, atc_tlv)) {
+ PrintAndLog("ATC check OK.");
+ PrintAndLog("fDDA (fast DDA) verified OK.");
+ } else {
+ PrintAndLog("ERROR: fDDA verified, but ATC in the certificate and ATC in the record not the same.");
+ }
+ } else {
+ PrintAndLog("\nERROR: fDDA (fast DDA) verify error");
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ emv_pk_free(icc_pk);
+ return 9;
+ }
+ } else {
+ struct tlvdb *dac_db = emv_pki_recover_dac(issuer_pk, tlv, sda_tlv);
+ if (dac_db) {
+ const struct tlv *dac_tlv = tlvdb_get(dac_db, 0x9f45, NULL);
+ printf("SDA verified OK. (%02hhx:%02hhx)\n", dac_tlv->value[0], dac_tlv->value[1]);
+ tlvdb_add(tlv, dac_db);
+ } else {
+ PrintAndLog("ERROR: SSAD verify error");
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ emv_pk_free(icc_pk);
+ return 4;
+ }
+
+ PrintAndLog("\n* Calc DDOL");
+ const struct tlv *ddol_tlv = tlvdb_get(tlv, 0x9f49, NULL);
+ if (!ddol_tlv) {
+ ddol_tlv = &default_ddol_tlv;
+ PrintAndLog("DDOL [9f49] not found. Using default DDOL");
+ }
+
+ struct tlv *ddol_data_tlv = dol_process(ddol_tlv, tlv, 0);
+ if (!ddol_data_tlv) {
+ PrintAndLog("ERROR: Can't create DDOL TLV");
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ emv_pk_free(icc_pk);
+ return 5;
+ }
+
+ PrintAndLog("DDOL data[%d]: %s", ddol_data_tlv->len, sprint_hex(ddol_data_tlv->value, ddol_data_tlv->len));
+
+ PrintAndLog("\n* Internal Authenticate");
+ int res = EMVInternalAuthenticate(true, (uint8_t *)ddol_data_tlv->value, ddol_data_tlv->len, buf, sizeof(buf), &len, &sw, NULL);
+ if (res) {
+ PrintAndLog("Internal Authenticate error(%d): %4x. Exit...", res, sw);
+ free(ddol_data_tlv);
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ emv_pk_free(icc_pk);
+ return 6;
+ }
+
+ struct tlvdb *dda_db = NULL;
+ if (buf[0] == 0x80) {
+ if (len < 3 ) {
+ PrintAndLog("ERROR: Internal Authenticate format1 parsing error. length=%d", len);
+ } else {
+ // 9f4b Signed Dynamic Application Data
+ dda_db = tlvdb_fixed(0x9f4b, len - 2, buf + 2);
+ tlvdb_add(tlv, dda_db);
+ if (decodeTLV){
+ PrintAndLog("* * Decode response format 1:");
+ TLVPrintFromTLV(dda_db);
+ }
+ }
+ } else {
+ dda_db = tlvdb_parse_multi(buf, len);
+ if(!dda_db) {
+ PrintAndLog("ERROR: Can't parse Internal Authenticate result as TLV");
+ free(ddol_data_tlv);
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ emv_pk_free(icc_pk);
+ return 7;
+ }
+ tlvdb_add(tlv, dda_db);
+
+ if (decodeTLV)
+ TLVPrintFromTLV(dda_db);
+ }
+
+ struct tlvdb *idn_db = emv_pki_recover_idn_ex(icc_pk, dda_db, ddol_data_tlv, true);
+ free(ddol_data_tlv);
+ if (!idn_db) {
+ PrintAndLog("ERROR: Can't recover IDN (ICC Dynamic Number)");
+ tlvdb_free(dda_db);
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ emv_pk_free(icc_pk);
+ return 8;
+ }
+ tlvdb_free(dda_db);
+
+ // 9f4c ICC Dynamic Number
+ const struct tlv *idn_tlv = tlvdb_get(idn_db, 0x9f4c, NULL);
+ if(idn_tlv) {
+ PrintAndLog("\nIDN (ICC Dynamic Number) [%zu] %s", idn_tlv->len, sprint_hex_inrow(idn_tlv->value, idn_tlv->len));
+ PrintAndLog("DDA verified OK.");
+ tlvdb_add(tlv, idn_db);
+ tlvdb_free(idn_db);
+ } else {
+ PrintAndLog("\nERROR: DDA verify error");
+ tlvdb_free(idn_db);
+
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ emv_pk_free(icc_pk);
+ return 9;
+ }
projects / proxmark3-svn / blobdiff