git.zerfleddert.de Git - proxmark3-svn/blob - client/emv/emvcore.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2017 Merlok
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // EMV core functions
   9 //-----------------------------------------------------------------------------
  10
  11 #include "emvcore.h"
  12 #include "emvjson.h"
  13 #include "util_posix.h"
  14
  15 // Got from here. Thanks)
  16 // https://eftlab.co.uk/index.php/site-map/knowledge-base/211-emv-aid-rid-pix
  17 static const char *PSElist [] = {
  18         "325041592E5359532E4444463031", // 2PAY.SYS.DDF01 - Visa Proximity Payment System Environment - PPSE
  19         "315041592E5359532E4444463031"  // 1PAY.SYS.DDF01 - Visa Payment System Environment - PSE
  20 };
  21 //static const size_t PSElistLen = sizeof(PSElist)/sizeof(char*);
  22
  23 char *TransactionTypeStr[] = {
  24         "MSD",
  25         "VSDC",
  26         "qVCDCMCHIP",
  27         "CDA"
  28 };
  29
  30 typedef struct {
  31         enum CardPSVendor vendor;
  32         const char* aid;
  33 } TAIDList;
  34
  35 static const TAIDList AIDlist [] = {
  36         // Visa International
  37         { CV_VISA,      "A00000000305076010"},                  // VISA ELO Credit
  38         { CV_VISA,      "A0000000031010" },                             // VISA Debit/Credit (Classic)
  39         { CV_VISA,      "A000000003101001" },                   // VISA Credit
  40         { CV_VISA,      "A000000003101002" },                   // VISA Debit
  41         { CV_VISA,      "A0000000032010" },                             // VISA Electron
  42         { CV_VISA,      "A0000000032020" },                             // VISA
  43         { CV_VISA,      "A0000000033010" },                             // VISA Interlink
  44         { CV_VISA,      "A0000000034010" },                             // VISA Specific
  45         { CV_VISA,      "A0000000035010" },                             // VISA Specific
  46         { CV_VISA,      "A0000000036010" },                             // Domestic Visa Cash Stored Value
  47         { CV_VISA,      "A0000000036020" },                             // International Visa Cash Stored Value
  48         { CV_VISA,      "A0000000038002" },                             // VISA Auth, VisaRemAuthen EMV-CAP (DPA)
  49         { CV_VISA,      "A0000000038010" },                             // VISA Plus
  50         { CV_VISA,      "A0000000039010" },                             // VISA Loyalty
  51         { CV_VISA,      "A000000003999910" },                   // VISA Proprietary ATM
  52         // Visa USA
  53         { CV_VISA,      "A000000098" },                                 // Debit Card
  54         { CV_VISA,      "A0000000980848" },                             // Debit Card
  55         // Mastercard International
  56         { CV_MASTERCARD, "A00000000401" },                      // MasterCard PayPass
  57         { CV_MASTERCARD, "A0000000041010" },            // MasterCard Credit
  58         { CV_MASTERCARD, "A00000000410101213" },        // MasterCard Credit
  59         { CV_MASTERCARD, "A00000000410101215" },        // MasterCard Credit
  60         { CV_MASTERCARD, "A0000000042010" },            // MasterCard Specific
  61         { CV_MASTERCARD, "A0000000043010" },            // MasterCard Specific
  62         { CV_MASTERCARD, "A0000000043060" },            // Maestro (Debit)
  63         { CV_MASTERCARD, "A000000004306001" },          // Maestro (Debit)
  64         { CV_MASTERCARD, "A0000000044010" },            // MasterCard Specific
  65         { CV_MASTERCARD, "A0000000045010" },            // MasterCard Specific
  66         { CV_MASTERCARD, "A0000000046000" },            // Cirrus
  67         { CV_MASTERCARD, "A0000000048002" },            // SecureCode Auth EMV-CAP
  68         { CV_MASTERCARD, "A0000000049999" },            // MasterCard PayPass
  69         // American Express
  70         { CV_AMERICANEXPRESS, "A000000025" },
  71         { CV_AMERICANEXPRESS, "A0000000250000" },
  72         { CV_AMERICANEXPRESS, "A00000002501" },
  73         { CV_AMERICANEXPRESS, "A000000025010402" },
  74         { CV_AMERICANEXPRESS, "A000000025010701" },
  75         { CV_AMERICANEXPRESS, "A000000025010801" },
  76         // Groupement des Cartes Bancaires "CB"
  77         { CV_CB, "A0000000421010" },                            // Cartes Bancaire EMV Card
  78         { CV_CB, "A0000000422010" },
  79         { CV_CB, "A0000000423010" },
  80         { CV_CB, "A0000000424010" },
  81         { CV_CB, "A0000000425010" },
  82         // JCB CO., LTD.
  83         { CV_JCB, "A00000006510" },                                     // JCB
  84         { CV_JCB, "A0000000651010" },                           // JCB J Smart Credit
  85         // Other
  86         { CV_OTHER, "A0000001544442" },                         // Banricompras Debito - Banrisul - Banco do Estado do Rio Grande do SUL - S.A.
  87         { CV_OTHER, "F0000000030001" },                         // BRADESCO
  88         { CV_OTHER, "A0000005241010" },                         // RuPay - RuPay
  89         { CV_OTHER, "D5780000021010" }                          // Bankaxept - Bankaxept
  90 };
  91 static const size_t AIDlistLen = sizeof(AIDlist)/sizeof(TAIDList);
  92
  93 static bool APDULogging = false;
  94 void SetAPDULogging(bool logging) {
  95         APDULogging = logging;
  96 }
  97
  98 enum CardPSVendor GetCardPSVendor(uint8_t * AID, size_t AIDlen) {
  99         char buf[100] = {0};
 100         if (AIDlen < 1)
 101                 return CV_NA;
 102
 103         hex_to_buffer((uint8_t *)buf, AID, AIDlen, sizeof(buf) - 1, 0, 0, true);
 104
 105         for(int i = 0; i < AIDlistLen; i ++) {
 106                 if (strncmp(AIDlist[i].aid, buf, strlen(AIDlist[i].aid)) == 0){
 107                         return AIDlist[i].vendor;
 108                 }
 109         }
 110
 111         return CV_NA;
 112 }
 113
 114 static bool print_cb(void *data, const struct tlv *tlv, int level, bool is_leaf) {
 115         emv_tag_dump(tlv, stdout, level);
 116         if (is_leaf) {
 117                 dump_buffer(tlv->value, tlv->len, stdout, level);
 118         }
 119
 120         return true;
 121 }
 122
 123 void TLVPrintFromBuffer(uint8_t *data, int datalen) {
 124         struct tlvdb *t = NULL;
 125         t = tlvdb_parse_multi(data, datalen);
 126         if (t) {
 127                 PrintAndLog("-------------------- TLV decoded --------------------");
 128
 129                 tlvdb_visit(t, print_cb, NULL, 0);
 130                 tlvdb_free(t);
 131         } else {
 132                 PrintAndLog("TLV ERROR: Can't parse response as TLV tree.");
 133         }
 134 }
 135
 136 void TLVPrintFromTLVLev(struct tlvdb *tlv, int level) {
 137         if (!tlv)
 138                 return;
 139
 140         tlvdb_visit(tlv, print_cb, NULL, level);
 141 }
 142
 143 void TLVPrintFromTLV(struct tlvdb *tlv) {
 144         TLVPrintFromTLVLev(tlv, 0);
 145 }
 146
 147 void TLVPrintAIDlistFromSelectTLV(struct tlvdb *tlv) {
 148         PrintAndLog("|------------------|--------|-------------------------|");
 149         PrintAndLog("|    AID           |Priority| Name                    |");
 150         PrintAndLog("|------------------|--------|-------------------------|");
 151
 152         struct tlvdb *ttmp = tlvdb_find(tlv, 0x6f);
 153         if (!ttmp)
 154                 PrintAndLog("|                         none                        |");
 155
 156         while (ttmp) {
 157                 const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x84, NULL);
 158                 const struct tlv *tgName = tlvdb_get_inchild(ttmp, 0x50, NULL);
 159                 const struct tlv *tgPrio = tlvdb_get_inchild(ttmp, 0x87, NULL);
 160                 if (!tgAID)
 161                         break;
 162                 PrintAndLog("|%s|   %s  |%s|",
 163                         sprint_hex_inrow_ex(tgAID->value, tgAID->len, 18),
 164                         (tgPrio) ? sprint_hex(tgPrio->value, 1) : "   ",
 165                         (tgName) ? sprint_ascii_ex(tgName->value, tgName->len, 25) : "                         ");
 166
 167                 ttmp = tlvdb_find_next(ttmp, 0x6f);
 168         }
 169
 170         PrintAndLog("|------------------|--------|-------------------------|");
 171 }
 172
 173 struct tlvdb *GetPANFromTrack2(const struct tlv *track2) {
 174         char track2Hex[200] = {0};
 175         uint8_t PAN[100] = {0};
 176         int PANlen = 0;
 177         char *tmp = track2Hex;
 178
 179         if (!track2)
 180                 return NULL;
 181
 182         for (int i = 0; i < track2->len; ++i, tmp += 2)
 183                 sprintf(tmp, "%02x", (unsigned int)track2->value[i]);
 184
 185         int posD = strchr(track2Hex, 'd') - track2Hex;
 186         if (posD < 1)
 187                 return NULL;
 188
 189         track2Hex[posD] = 0;
 190         if (strlen(track2Hex) % 2) {
 191                 track2Hex[posD] = 'F';
 192                 track2Hex[posD + 1] = '\0';
 193         }
 194
 195         param_gethex_to_eol(track2Hex, 0, PAN, sizeof(PAN), &PANlen);
 196
 197   return tlvdb_fixed(0x5a, PANlen, PAN);
 198 }
 199
 200 struct tlvdb *GetdCVVRawFromTrack2(const struct tlv *track2) {
 201         char track2Hex[200] = {0};
 202         char dCVVHex[100] = {0};
 203         uint8_t dCVV[100] = {0};
 204         int dCVVlen = 0;
 205         const int PINlen = 5; // must calculated from 9F67 MSD Offset but i have not seen this tag)
 206         char *tmp = track2Hex;
 207
 208         if (!track2)
 209                 return NULL;
 210
 211         for (int i = 0; i < track2->len; ++i, tmp += 2)
 212                 sprintf(tmp, "%02x", (unsigned int)track2->value[i]);
 213
 214         int posD = strchr(track2Hex, 'd') - track2Hex;
 215         if (posD < 1)
 216                 return NULL;
 217
 218         memset(dCVVHex, '0', 32);
 219         // ATC
 220         memcpy(dCVVHex + 0, track2Hex + posD + PINlen + 11, 4);
 221         // PAN 5 hex
 222         memcpy(dCVVHex + 4, track2Hex, 5);
 223         // expire date
 224         memcpy(dCVVHex + 9, track2Hex + posD + 1, 4);
 225         // service code
 226         memcpy(dCVVHex + 13, track2Hex + posD + 5, 3);
 227
 228         param_gethex_to_eol(dCVVHex, 0, dCVV, sizeof(dCVV), &dCVVlen);
 229
 230   return tlvdb_fixed(0x02, dCVVlen, dCVV);
 231 }
 232
 233 int EMVExchangeEx(bool ActivateField, bool LeaveFieldON, sAPDU apdu, bool IncludeLe, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) {
 234         uint8_t data[APDU_RES_LEN] = {0};
 235
 236         *ResultLen = 0;
 237         if (sw) *sw = 0;
 238         uint16_t isw = 0;
 239
 240         if (ActivateField){
 241                 DropField();
 242                 msleep(50);
 243         }
 244
 245         // COMPUTE APDU
 246         memcpy(data, &apdu, 5);
 247         if (apdu.data)
 248                 memcpy(&data[5], apdu.data, apdu.Lc);
 249
 250         if (APDULogging)
 251                 PrintAndLog(">>>> %s", sprint_hex(data, (IncludeLe?6:5) + apdu.Lc));
 252
 253         // 6 byes + data = INS + CLA + P1 + P2 + Lc + <data = Nc> + Le(?IncludeLe)
 254         int res = ExchangeAPDU14a(data, (IncludeLe?6:5) + apdu.Lc, ActivateField, LeaveFieldON, Result, (int)MaxResultLen, (int *)ResultLen);
 255
 256         if (res) {
 257                 return res;
 258         }
 259
 260         if (APDULogging)
 261                 PrintAndLog("<<<< %s", sprint_hex(Result, *ResultLen));
 262
 263         *ResultLen -= 2;
 264         isw = Result[*ResultLen] * 0x0100 + Result[*ResultLen + 1];
 265         if (sw)
 266                 *sw = isw;
 267
 268         if (isw != 0x9000) {
 269                 if (APDULogging)
 270                         PrintAndLog("APDU(%02x%02x) ERROR: [%4X] %s", apdu.CLA, apdu.INS, isw, GetAPDUCodeDescription(*sw >> 8, *sw & 0xff));
 271                 return 5;
 272         }
 273
 274         // add to tlv tree
 275         if (tlv) {
 276                 struct tlvdb *t = tlvdb_parse_multi(Result, *ResultLen);
 277                 tlvdb_add(tlv, t);
 278         }
 279
 280         return 0;
 281 }
 282
 283 int EMVExchange(bool LeaveFieldON, sAPDU apdu, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) {
 284         return EMVExchangeEx(false, LeaveFieldON, apdu, true, Result, MaxResultLen, ResultLen, sw, tlv);
 285 }
 286
 287 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) {
 288         return EMVExchangeEx(ActivateField, LeaveFieldON, (sAPDU){0x00, 0xa4, 0x04, 0x00, AIDLen, AID}, true, Result, MaxResultLen, ResultLen, sw, tlv);
 289 }
 290
 291 int EMVSelectPSE(bool ActivateField, bool LeaveFieldON, uint8_t PSENum, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw) {
 292         uint8_t buf[APDU_AID_LEN] = {0};
 293         *ResultLen = 0;
 294         int len = 0;
 295         int res = 0;
 296         switch (PSENum) {
 297                 case 1:
 298                         param_gethex_to_eol(PSElist[1], 0, buf, sizeof(buf), &len);
 299                         break;
 300                 case 2:
 301                         param_gethex_to_eol(PSElist[0], 0, buf, sizeof(buf), &len);
 302                         break;
 303                 default:
 304                         return -1;
 305         }
 306
 307         // select
 308         res = EMVSelect(ActivateField, LeaveFieldON, buf, len, Result, MaxResultLen, ResultLen, sw, NULL);
 309
 310         return res;
 311 }
 312
 313 int EMVSearchPSE(bool ActivateField, bool LeaveFieldON, bool decodeTLV, struct tlvdb *tlv) {
 314         uint8_t data[APDU_RES_LEN] = {0};
 315         size_t datalen = 0;
 316         uint16_t sw = 0;
 317         int res;
 318
 319         // select PPSE
 320         res = EMVSelectPSE(ActivateField, true, 2, data, sizeof(data), &datalen, &sw);
 321
 322         if (!res){
 323                 struct tlvdb *t = NULL;
 324                 t = tlvdb_parse_multi(data, datalen);
 325                 if (t) {
 326                         int retrycnt = 0;
 327                         struct tlvdb *ttmp = tlvdb_find_path(t, (tlv_tag_t[]){0x6f, 0xa5, 0xbf0c, 0x61, 0x00});
 328                         if (!ttmp)
 329                                 PrintAndLog("PPSE don't have records.");
 330
 331                         while (ttmp) {
 332                                 const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x4f, NULL);
 333                                 if (tgAID) {
 334                                         res = EMVSelect(false, true, (uint8_t *)tgAID->value, tgAID->len, data, sizeof(data), &datalen, &sw, tlv);
 335
 336                                         // retry if error and not returned sw error
 337                                         if (res && res != 5) {
 338                                                 if (++retrycnt < 3){
 339                                                         continue;
 340                                                 } else {
 341                                                         // card select error, proxmark error
 342                                                         if (res == 1) {
 343                                                                 PrintAndLog("Exit...");
 344                                                                 return 1;
 345                                                         }
 346
 347                                                         retrycnt = 0;
 348                                                         PrintAndLog("Retry failed [%s]. Skiped...", sprint_hex_inrow(tgAID->value, tgAID->len));
 349                                                 }
 350
 351                                                 // next element
 352                                                 ttmp = tlvdb_find_next(ttmp, 0x61);
 353                                                 continue;
 354                                         }
 355                                         retrycnt = 0;
 356
 357                                         // all is ok
 358                                         if (decodeTLV){
 359                                                 PrintAndLog("%s:", sprint_hex_inrow(tgAID->value, tgAID->len));
 360                                                 TLVPrintFromBuffer(data, datalen);
 361                                         }
 362                                 }
 363
 364                                 ttmp = tlvdb_find_next(ttmp, 0x61);
 365                         }
 366
 367                         tlvdb_free(t);
 368                 } else {
 369                         PrintAndLog("PPSE ERROR: Can't get TLV from response.");
 370                 }
 371         } else {
 372                 PrintAndLog("PPSE ERROR: Can't select PPSE AID. Error: %d", res);
 373         }
 374
 375         if(!LeaveFieldON)
 376                 DropField();
 377
 378         return res;
 379 }
 380
 381 int EMVSearch(bool ActivateField, bool LeaveFieldON, bool decodeTLV, struct tlvdb *tlv) {
 382         uint8_t aidbuf[APDU_AID_LEN] = {0};
 383         int aidlen = 0;
 384         uint8_t data[APDU_RES_LEN] = {0};
 385         size_t datalen = 0;
 386         uint16_t sw = 0;
 387
 388         int res = 0;
 389         int retrycnt = 0;
 390         for(int i = 0; i < AIDlistLen; i ++) {
 391                 param_gethex_to_eol(AIDlist[i].aid, 0, aidbuf, sizeof(aidbuf), &aidlen);
 392                 res = EMVSelect((i == 0) ? ActivateField : false, (i == AIDlistLen - 1) ? LeaveFieldON : true, aidbuf, aidlen, data, sizeof(data), &datalen, &sw, tlv);
 393                 // retry if error and not returned sw error
 394                 if (res && res != 5) {
 395                         if (++retrycnt < 3){
 396                                 i--;
 397                         } else {
 398                                 // card select error, proxmark error
 399                                 if (res == 1) {
 400                                         PrintAndLog("Exit...");
 401                                         return 1;
 402                                 }
 403
 404                                 retrycnt = 0;
 405                                 PrintAndLog("Retry failed [%s]. Skiped...", AIDlist[i].aid);
 406                         }
 407                         continue;
 408                 }
 409                 retrycnt = 0;
 410
 411                 if (res)
 412                         continue;
 413
 414                 if (decodeTLV){
 415                         PrintAndLog("%s:", AIDlist[i].aid);
 416                         TLVPrintFromBuffer(data, datalen);
 417                 }
 418         }
 419
 420         return 0;
 421 }
 422
 423 int EMVSelectApplication(struct tlvdb *tlv, uint8_t *AID, size_t *AIDlen) {
 424         // check priority. 0x00 - highest
 425         int prio = 0xffff;
 426
 427         *AIDlen = 0;
 428
 429         struct tlvdb *ttmp = tlvdb_find(tlv, 0x6f);
 430         if (!ttmp)
 431                 return 1;
 432
 433         while (ttmp) {
 434                 const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x84, NULL);
 435                 const struct tlv *tgPrio = tlvdb_get_inchild(ttmp, 0x87, NULL);
 436
 437                 if (!tgAID)
 438                         break;
 439
 440                 if (tgPrio) {
 441                         int pt = bytes_to_num((uint8_t*)tgPrio->value, (tgPrio->len < 2) ? tgPrio->len : 2);
 442                         if (pt < prio) {
 443                                 prio = pt;
 444
 445                                 memcpy(AID, tgAID->value, tgAID->len);
 446                                 *AIDlen = tgAID->len;
 447                         }
 448                 } else {
 449                         // takes the first application from list wo priority
 450                         if (!*AIDlen) {
 451                         memcpy(AID, tgAID->value, tgAID->len);
 452                         *AIDlen = tgAID->len;
 453                         }
 454                 }
 455
 456                 ttmp = tlvdb_find_next(ttmp, 0x6f);
 457         }
 458
 459         return 0;
 460 }
 461
 462 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) {
 463         return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0xa8, 0x00, 0x00, PDOLLen, PDOL}, Result, MaxResultLen, ResultLen, sw, tlv);
 464 }
 465
 466 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) {
 467         int res = EMVExchange(LeaveFieldON, (sAPDU){0x00, 0xb2, SFIrec, (SFI << 3) | 0x04, 0, NULL}, Result, MaxResultLen, ResultLen, sw, tlv);
 468         if (*sw == 0x6700) {
 469                 PrintAndLog(">>> trying to reissue command withouth Le...");
 470                 res = EMVExchangeEx(false, LeaveFieldON, (sAPDU){0x00, 0xb2, SFIrec, (SFI << 3) | 0x04, 0, NULL}, false, Result, MaxResultLen, ResultLen, sw, tlv);
 471         }
 472         return res;
 473 }
 474
 475 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) {
 476         return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0xae, RefControl, 0x00, CDOLLen, CDOL}, Result, MaxResultLen, ResultLen, sw, tlv);
 477 }
 478
 479 int EMVGenerateChallenge(bool LeaveFieldON, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) {
 480         int res = EMVExchange(LeaveFieldON, (sAPDU){0x00, 0x84, 0x00, 0x00, 0x00, NULL}, Result, MaxResultLen, ResultLen, sw, tlv);
 481         if (*sw == 0x6700) {
 482                 PrintAndLog(">>> trying to reissue command withouth Le...");
 483                 res = EMVExchangeEx(false, LeaveFieldON, (sAPDU){0x00, 0x84, 0x00, 0x00, 0x00, NULL}, false, Result, MaxResultLen, ResultLen, sw, tlv);
 484         }
 485         return res;
 486 }
 487
 488 int EMVInternalAuthenticate(bool LeaveFieldON, uint8_t *DDOL, size_t DDOLLen, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) {
 489         return EMVExchange(LeaveFieldON, (sAPDU){0x00, 0x88, 0x00, 0x00, DDOLLen, DDOL}, Result, MaxResultLen, ResultLen, sw, tlv);
 490 }
 491
 492 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) {
 493         return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0x2a, 0x8e, 0x80, UDOLlen, UDOL}, Result, MaxResultLen, ResultLen, sw, tlv);
 494 }
 495
 496 // Authentication
 497 static struct emv_pk *get_ca_pk(struct tlvdb *db) {
 498         const struct tlv *df_tlv = tlvdb_get(db, 0x84, NULL);
 499         const struct tlv *caidx_tlv = tlvdb_get(db, 0x8f, NULL);
 500
 501         if (!df_tlv || !caidx_tlv || df_tlv->len < 6 || caidx_tlv->len != 1)
 502                 return NULL;
 503
 504         PrintAndLog("CA public key index 0x%0x", caidx_tlv->value[0]);
 505         return emv_pk_get_ca_pk(df_tlv->value, caidx_tlv->value[0]);
 506 }
 507
 508 int trSDA(struct tlvdb *tlv) {
 509
 510         struct emv_pk *pk = get_ca_pk(tlv);
 511         if (!pk) {
 512                 PrintAndLog("ERROR: Key not found. Exit.");
 513                 return 2;
 514         }
 515
 516         struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
 517         if (!issuer_pk) {
 518                 emv_pk_free(pk);
 519                 PrintAndLog("ERROR: Issuer certificate not found. Exit.");
 520                 return 2;
 521         }
 522
 523         PrintAndLog("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx",
 524                 issuer_pk->rid[0],
 525                 issuer_pk->rid[1],
 526                 issuer_pk->rid[2],
 527                 issuer_pk->rid[3],
 528                 issuer_pk->rid[4],
 529                 issuer_pk->index,
 530                 issuer_pk->serial[0],
 531                 issuer_pk->serial[1],
 532                 issuer_pk->serial[2]
 533                 );
 534
 535         const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
 536         if (!sda_tlv || sda_tlv->len < 1) {
 537                 emv_pk_free(issuer_pk);
 538                 emv_pk_free(pk);
 539                 PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
 540                 return 3;
 541         }
 542
 543         struct tlvdb *dac_db = emv_pki_recover_dac(issuer_pk, tlv, sda_tlv);
 544         if (dac_db) {
 545                 const struct tlv *dac_tlv = tlvdb_get(dac_db, 0x9f45, NULL);
 546                 PrintAndLog("SDA verified OK. (%02hhx:%02hhx)\n", dac_tlv->value[0], dac_tlv->value[1]);
 547                 tlvdb_add(tlv, dac_db);
 548         } else {
 549                 emv_pk_free(issuer_pk);
 550                 emv_pk_free(pk);
 551                 PrintAndLog("ERROR: SSAD verify error");
 552                 return 4;
 553         }
 554
 555         emv_pk_free(issuer_pk);
 556         emv_pk_free(pk);
 557         return 0;
 558 }
 559
 560 static const unsigned char default_ddol_value[] = {0x9f, 0x37, 0x04};
 561 static struct tlv default_ddol_tlv = {.tag = 0x9f49, .len = 3, .value = default_ddol_value };
 562
 563 int trDDA(bool decodeTLV, struct tlvdb *tlv) {
 564         uint8_t buf[APDU_RES_LEN] = {0};
 565         size_t len = 0;
 566         uint16_t sw = 0;
 567
 568         struct emv_pk *pk = get_ca_pk(tlv);
 569         if (!pk) {
 570                 PrintAndLog("ERROR: Key not found. Exit.");
 571                 return 2;
 572         }
 573
 574         const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
 575         if (!sda_tlv || sda_tlv->len < 1) {
 576                 emv_pk_free(pk);
 577                 PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
 578                 return 3;
 579         }
 580
 581         struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
 582         if (!issuer_pk) {
 583                 emv_pk_free(pk);
 584                 PrintAndLog("ERROR: Issuer certificate not found. Exit.");
 585                 return 2;
 586         }
 587         printf("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 588                         issuer_pk->rid[0],
 589                         issuer_pk->rid[1],
 590                         issuer_pk->rid[2],
 591                         issuer_pk->rid[3],
 592                         issuer_pk->rid[4],
 593                         issuer_pk->index,
 594                         issuer_pk->serial[0],
 595                         issuer_pk->serial[1],
 596                         issuer_pk->serial[2]
 597                         );
 598
 599         struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlv, sda_tlv);
 600         if (!icc_pk) {
 601                 emv_pk_free(pk);
 602                 emv_pk_free(issuer_pk);
 603                 PrintAndLog("ERROR: ICC setrificate not found. Exit.");
 604                 return 2;
 605         }
 606         printf("ICC PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 607                         icc_pk->rid[0],
 608                         icc_pk->rid[1],
 609                         icc_pk->rid[2],
 610                         icc_pk->rid[3],
 611                         icc_pk->rid[4],
 612                         icc_pk->index,
 613                         icc_pk->serial[0],
 614                         icc_pk->serial[1],
 615                         icc_pk->serial[2]
 616                         );
 617
 618         struct emv_pk *icc_pe_pk = emv_pki_recover_icc_pe_cert(issuer_pk, tlv);
 619         if (!icc_pe_pk) {
 620                 PrintAndLog("WARNING: ICC PE PK recover error. ");
 621         } else {
 622                 printf("ICC PE PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 623                                 icc_pe_pk->rid[0],
 624                                 icc_pe_pk->rid[1],
 625                                 icc_pe_pk->rid[2],
 626                                 icc_pe_pk->rid[3],
 627                                 icc_pe_pk->rid[4],
 628                                 icc_pe_pk->index,
 629                                 icc_pe_pk->serial[0],
 630                                 icc_pe_pk->serial[1],
 631                                 icc_pe_pk->serial[2]
 632                                 );
 633         }
 634
 635         // 9F4B: Signed Dynamic Application Data
 636         const struct tlv *sdad_tlv = tlvdb_get(tlv, 0x9f4b, NULL);
 637         // DDA with internal authenticate OR fDDA with filled 0x9F4B tag (GPO result)
 638         // EMV kernel3 v2.4, contactless book C-3, C.1., page 147
 639         if (sdad_tlv) {
 640                 PrintAndLog("\n* * Got Signed Dynamic Application Data (9F4B) form GPO. Maybe fDDA...");
 641
 642                 const struct tlvdb *atc_db = emv_pki_recover_atc_ex(icc_pk, tlv, true);
 643                 if (!atc_db) {
 644                         PrintAndLog("ERROR: Can't recover IDN (ICC Dynamic Number)");
 645                         emv_pk_free(pk);
 646                         emv_pk_free(issuer_pk);
 647                         emv_pk_free(icc_pk);
 648                         return 8;
 649                 }
 650
 651                 // 9f36 Application Transaction Counter (ATC)
 652                 const struct tlv *atc_tlv = tlvdb_get(atc_db, 0x9f36, NULL);
 653                 if(atc_tlv) {
 654                         PrintAndLog("\nATC (Application Transaction Counter) [%zu] %s", atc_tlv->len, sprint_hex_inrow(atc_tlv->value, atc_tlv->len));
 655
 656                         const struct tlv *core_atc_tlv = tlvdb_get(tlv, 0x9f36, NULL);
 657                         if(tlv_equal(core_atc_tlv, atc_tlv)) {
 658                                 PrintAndLog("ATC check OK.");
 659                                 PrintAndLog("fDDA (fast DDA) verified OK.");
 660                         } else {
 661                                 PrintAndLog("ERROR: fDDA verified, but ATC in the certificate and ATC in the record not the same.");
 662                         }
 663                 } else {
 664                         PrintAndLog("\nERROR: fDDA (fast DDA) verify error");
 665                         emv_pk_free(pk);
 666                         emv_pk_free(issuer_pk);
 667                         emv_pk_free(icc_pk);
 668                         return 9;
 669                 }
 670         } else {
 671                 struct tlvdb *dac_db = emv_pki_recover_dac(issuer_pk, tlv, sda_tlv);
 672                 if (dac_db) {
 673                         const struct tlv *dac_tlv = tlvdb_get(dac_db, 0x9f45, NULL);
 674                         printf("SDA verified OK. (%02hhx:%02hhx)\n", dac_tlv->value[0], dac_tlv->value[1]);
 675                         tlvdb_add(tlv, dac_db);
 676                 } else {
 677                         PrintAndLog("ERROR: SSAD verify error");
 678                         emv_pk_free(pk);
 679                         emv_pk_free(issuer_pk);
 680                         emv_pk_free(icc_pk);
 681                         return 4;
 682                 }
 683
 684                 PrintAndLog("\n* Calc DDOL");
 685                 const struct tlv *ddol_tlv = tlvdb_get(tlv, 0x9f49, NULL);
 686                 if (!ddol_tlv) {
 687                         ddol_tlv = &default_ddol_tlv;
 688                         PrintAndLog("DDOL [9f49] not found. Using default DDOL");
 689                 }
 690
 691                 struct tlv *ddol_data_tlv = dol_process(ddol_tlv, tlv, 0);
 692                 if (!ddol_data_tlv) {
 693                         PrintAndLog("ERROR: Can't create DDOL TLV");
 694                         emv_pk_free(pk);
 695                         emv_pk_free(issuer_pk);
 696                         emv_pk_free(icc_pk);
 697                         return 5;
 698                 }
 699
 700                 PrintAndLog("DDOL data[%d]: %s", ddol_data_tlv->len, sprint_hex(ddol_data_tlv->value, ddol_data_tlv->len));
 701
 702                 PrintAndLog("\n* Internal Authenticate");
 703                 int res = EMVInternalAuthenticate(true, (uint8_t *)ddol_data_tlv->value, ddol_data_tlv->len, buf, sizeof(buf), &len, &sw, NULL);
 704                 if (res) {
 705                         PrintAndLog("Internal Authenticate error(%d): %4x. Exit...", res, sw);
 706                         free(ddol_data_tlv);
 707                         emv_pk_free(pk);
 708                         emv_pk_free(issuer_pk);
 709                         emv_pk_free(icc_pk);
 710                         return 6;
 711                 }
 712
 713                 struct tlvdb *dda_db = NULL;
 714                 if (buf[0] == 0x80) {
 715                         if (len < 3 ) {
 716                                 PrintAndLog("ERROR: Internal Authenticate format1 parsing error. length=%d", len);
 717                         } else {
 718                                 // 9f4b Signed Dynamic Application Data
 719                                 dda_db = tlvdb_fixed(0x9f4b, len - 2, buf + 2);
 720                                 tlvdb_add(tlv, dda_db);
 721                                 if (decodeTLV){
 722                                         PrintAndLog("* * Decode response format 1:");
 723                                         TLVPrintFromTLV(dda_db);
 724                                 }
 725                         }
 726                 } else {
 727                         dda_db = tlvdb_parse_multi(buf, len);
 728                         if(!dda_db) {
 729                                 PrintAndLog("ERROR: Can't parse Internal Authenticate result as TLV");
 730                                 free(ddol_data_tlv);
 731                                 emv_pk_free(pk);
 732                                 emv_pk_free(issuer_pk);
 733                                 emv_pk_free(icc_pk);
 734                                 return 7;
 735                         }
 736                         tlvdb_add(tlv, dda_db);
 737
 738                         if (decodeTLV)
 739                                 TLVPrintFromTLV(dda_db);
 740                 }
 741
 742                 struct tlvdb *idn_db = emv_pki_recover_idn_ex(icc_pk, dda_db, ddol_data_tlv, true);
 743                 free(ddol_data_tlv);
 744                 if (!idn_db) {
 745                         PrintAndLog("ERROR: Can't recover IDN (ICC Dynamic Number)");
 746                         tlvdb_free(dda_db);
 747                         emv_pk_free(pk);
 748                         emv_pk_free(issuer_pk);
 749                         emv_pk_free(icc_pk);
 750                         return 8;
 751                 }
 752                 tlvdb_free(dda_db);
 753
 754                 // 9f4c ICC Dynamic Number
 755                 const struct tlv *idn_tlv = tlvdb_get(idn_db, 0x9f4c, NULL);
 756                 if(idn_tlv) {
 757                         PrintAndLog("\nIDN (ICC Dynamic Number) [%zu] %s", idn_tlv->len, sprint_hex_inrow(idn_tlv->value, idn_tlv->len));
 758                         PrintAndLog("DDA verified OK.");
 759                         tlvdb_add(tlv, idn_db);
 760                         tlvdb_free(idn_db);
 761                 } else {
 762                         PrintAndLog("\nERROR: DDA verify error");
 763                         tlvdb_free(idn_db);
 764
 765                         emv_pk_free(pk);
 766                         emv_pk_free(issuer_pk);
 767                         emv_pk_free(icc_pk);
 768                         return 9;
 769                 }
 770         }
 771
 772         emv_pk_free(pk);
 773         emv_pk_free(issuer_pk);
 774         emv_pk_free(icc_pk);
 775         return 0;
 776 }
 777
 778 int trCDA(struct tlvdb *tlv, struct tlvdb *ac_tlv, struct tlv *pdol_data_tlv, struct tlv *ac_data_tlv) {
 779
 780         struct emv_pk *pk = get_ca_pk(tlv);
 781         if (!pk) {
 782                 PrintAndLog("ERROR: Key not found. Exit.");
 783                 return 2;
 784         }
 785
 786         const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
 787         if (!sda_tlv || sda_tlv->len < 1) {
 788                 PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
 789                 emv_pk_free(pk);
 790                 return 3;
 791         }
 792
 793         struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
 794         if (!issuer_pk) {
 795                 PrintAndLog("ERROR: Issuer certificate not found. Exit.");
 796                 emv_pk_free(pk);
 797                 return 2;
 798         }
 799         printf("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 800                         issuer_pk->rid[0],
 801                         issuer_pk->rid[1],
 802                         issuer_pk->rid[2],
 803                         issuer_pk->rid[3],
 804                         issuer_pk->rid[4],
 805                         issuer_pk->index,
 806                         issuer_pk->serial[0],
 807                         issuer_pk->serial[1],
 808                         issuer_pk->serial[2]
 809                         );
 810
 811         struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlv, sda_tlv);
 812         if (!icc_pk) {
 813                 PrintAndLog("ERROR: ICC setrificate not found. Exit.");
 814                 emv_pk_free(pk);
 815                 emv_pk_free(issuer_pk);
 816                 return 2;
 817         }
 818         printf("ICC PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 819                         icc_pk->rid[0],
 820                         icc_pk->rid[1],
 821                         icc_pk->rid[2],
 822                         icc_pk->rid[3],
 823                         icc_pk->rid[4],
 824                         icc_pk->index,
 825                         icc_pk->serial[0],
 826                         icc_pk->serial[1],
 827                         icc_pk->serial[2]
 828                         );
 829
 830         struct tlvdb *dac_db = emv_pki_recover_dac(issuer_pk, tlv, sda_tlv);
 831         if (dac_db) {
 832                 const struct tlv *dac_tlv = tlvdb_get(dac_db, 0x9f45, NULL);
 833                 PrintAndLog("SSAD verified OK. (%02hhx:%02hhx)", dac_tlv->value[0], dac_tlv->value[1]);
 834                 tlvdb_add(tlv, dac_db);
 835         } else {
 836                 PrintAndLog("ERROR: SSAD verify error");
 837                 emv_pk_free(pk);
 838                 emv_pk_free(issuer_pk);
 839                 emv_pk_free(icc_pk);
 840                 return 4;
 841         }
 842
 843         PrintAndLog("\n* * Check Signed Dynamic Application Data (SDAD)");
 844         struct tlvdb *idn_db = emv_pki_perform_cda_ex(icc_pk, tlv, ac_tlv,
 845                         pdol_data_tlv, // pdol
 846                         ac_data_tlv,   // cdol1
 847                         NULL,          // cdol2
 848                         true);
 849         if (idn_db) {
 850                 const struct tlv *idn_tlv = tlvdb_get(idn_db, 0x9f4c, NULL);
 851                 PrintAndLog("\nIDN (ICC Dynamic Number) [%zu] %s", idn_tlv->len, sprint_hex_inrow(idn_tlv->value, idn_tlv->len));
 852                 PrintAndLog("CDA verified OK.");
 853                 tlvdb_add(tlv, idn_db);
 854         } else {
 855                 PrintAndLog("\nERROR: CDA verify error");
 856         }
 857
 858         emv_pk_free(pk);
 859         emv_pk_free(issuer_pk);
 860         emv_pk_free(icc_pk);
 861         return 0;
 862 }
 863
 864 int RecoveryCertificates(struct tlvdb *tlvRoot, json_t *root) {
 865
 866         struct emv_pk *pk = get_ca_pk(tlvRoot);
 867         if (!pk) {
 868                 PrintAndLog("ERROR: Key not found. Exit.");
 869                 return 1;
 870         }
 871
 872         struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlvRoot);
 873         if (!issuer_pk) {
 874                 emv_pk_free(pk);
 875                 PrintAndLog("WARNING: Issuer certificate not found. Exit.");
 876                 return 2;
 877         }
 878         PrintAndLog("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx",
 879                         issuer_pk->rid[0],
 880                         issuer_pk->rid[1],
 881                         issuer_pk->rid[2],
 882                         issuer_pk->rid[3],
 883                         issuer_pk->rid[4],
 884                         issuer_pk->index,
 885                         issuer_pk->serial[0],
 886                         issuer_pk->serial[1],
 887                         issuer_pk->serial[2]
 888                         );
 889
 890         JsonSaveBufAsHex(root, "$.ApplicationData.RID", issuer_pk->rid, 5);
 891
 892         char *issuer_pk_c = emv_pk_dump_pk(issuer_pk);
 893         JsonSaveStr(root, "$.ApplicationData.IssuerPublicKeyDec", issuer_pk_c);
 894         JsonSaveBufAsHex(root, "$.ApplicationData.IssuerPublicKeyModulus", issuer_pk->modulus, issuer_pk->mlen);
 895         free(issuer_pk_c);
 896
 897         struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlvRoot, NULL);
 898         if (!icc_pk) {
 899                 emv_pk_free(pk);
 900                 emv_pk_free(issuer_pk);
 901                 PrintAndLog("WARNING: ICC certificate not found. Exit.");
 902                 return 2;
 903         }
 904         printf("ICC PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 905                         icc_pk->rid[0],
 906                         icc_pk->rid[1],
 907                         icc_pk->rid[2],
 908                         icc_pk->rid[3],
 909                         icc_pk->rid[4],
 910                         icc_pk->index,
 911                         icc_pk->serial[0],
 912                         icc_pk->serial[1],
 913                         icc_pk->serial[2]
 914                         );
 915
 916         char *icc_pk_c = emv_pk_dump_pk(icc_pk);
 917         JsonSaveStr(root, "$.ApplicationData.ICCPublicKeyDec", icc_pk_c);
 918         JsonSaveBufAsHex(root, "$.ApplicationData.ICCPublicKeyModulus", icc_pk->modulus, icc_pk->mlen);
 919         free(issuer_pk_c);
 920
 921         return 0;
 922 }