+ emv_pk_free(issuer_pk);
+ emv_pk_free(pk);
+ return 0;
+}
+
+static const unsigned char default_ddol_value[] = {0x9f, 0x37, 0x04};
+static struct tlv default_ddol_tlv = {.tag = 0x9f49, .len = 3, .value = default_ddol_value };
+
+int trDDA(bool decodeTLV, struct tlvdb *tlv) {
+ uint8_t buf[APDU_RES_LEN] = {0};
+ size_t len = 0;
+ uint16_t sw = 0;
+
+ struct emv_pk *pk = get_ca_pk(tlv);
+ if (!pk) {
+ PrintAndLog("ERROR: Key not found. Exit.");
+ return 2;
+ }
+
+ const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
+ if (!sda_tlv || sda_tlv->len < 1) {
+ emv_pk_free(pk);
+ PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
+ return 3;
+ }
+
+ struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
+ if (!issuer_pk) {
+ emv_pk_free(pk);
+ PrintAndLog("ERROR: Issuer certificate not found. Exit.");
+ return 2;
+ }
+ printf("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
+ issuer_pk->rid[0],
+ issuer_pk->rid[1],
+ issuer_pk->rid[2],
+ issuer_pk->rid[3],
+ issuer_pk->rid[4],
+ issuer_pk->index,
+ issuer_pk->serial[0],
+ issuer_pk->serial[1],
+ issuer_pk->serial[2]
+ );
+
+ struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlv, sda_tlv);
+ if (!icc_pk) {
+ emv_pk_free(pk);
+ emv_pk_free(issuer_pk);
+ PrintAndLog("ERROR: ICC setrificate not found. Exit.");
+ return 2;
+ }
+ printf("ICC PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
+ icc_pk->rid[0],
+ icc_pk->rid[1],
+ icc_pk->rid[2],
+ icc_pk->rid[3],
+ icc_pk->rid[4],
+ icc_pk->index,
+ icc_pk->serial[0],
+ icc_pk->serial[1],
+ icc_pk->serial[2]
+ );
+
+ struct emv_pk *icc_pe_pk = emv_pki_recover_icc_pe_cert(issuer_pk, tlv);
+ if (!icc_pe_pk) {
+ PrintAndLog("WARNING: ICC PE PK recover error. ");
+ } else {
+ printf("ICC PE PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
+ icc_pe_pk->rid[0],
+ icc_pe_pk->rid[1],
+ icc_pe_pk->rid[2],
+ icc_pe_pk->rid[3],
+ icc_pe_pk->rid[4],
+ icc_pe_pk->index,
+ icc_pe_pk->serial[0],
+ icc_pe_pk->serial[1],
+ icc_pe_pk->serial[2]
+ );
+ }
+
+ // 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