cvs.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                         if (*sw >> 8 == 0x61) {
 271                                 PrintAndLog("APDU chaining len:%02x -->", *sw & 0xff);
 272                         } else {
 273                                 PrintAndLog("APDU(%02x%02x) ERROR: [%4X] %s", apdu.CLA, apdu.INS, isw, GetAPDUCodeDescription(*sw >> 8, *sw & 0xff));
 274                                 return 5;
 275                         }
 276                 }
 277         }
 278
 279         // add to tlv tree
 280         if (tlv) {
 281                 struct tlvdb *t = tlvdb_parse_multi(Result, *ResultLen);
 282                 tlvdb_add(tlv, t);
 283         }
 284
 285         return 0;
 286 }
 287
 288 int EMVExchange(bool LeaveFieldON, sAPDU apdu, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) {
 289         return EMVExchangeEx(false, LeaveFieldON, apdu, true, Result, MaxResultLen, ResultLen, sw, tlv);
 290 }
 291
 292 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) {
 293         return EMVExchangeEx(ActivateField, LeaveFieldON, (sAPDU){0x00, 0xa4, 0x04, 0x00, AIDLen, AID}, true, Result, MaxResultLen, ResultLen, sw, tlv);
 294 }
 295
 296 int EMVSelectPSE(bool ActivateField, bool LeaveFieldON, uint8_t PSENum, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw) {
 297         uint8_t buf[APDU_AID_LEN] = {0};
 298         *ResultLen = 0;
 299         int len = 0;
 300         int res = 0;
 301         switch (PSENum) {
 302                 case 1:
 303                         param_gethex_to_eol(PSElist[1], 0, buf, sizeof(buf), &len);
 304                         break;
 305                 case 2:
 306                         param_gethex_to_eol(PSElist[0], 0, buf, sizeof(buf), &len);
 307                         break;
 308                 default:
 309                         return -1;
 310         }
 311
 312         // select
 313         res = EMVSelect(ActivateField, LeaveFieldON, buf, len, Result, MaxResultLen, ResultLen, sw, NULL);
 314
 315         return res;
 316 }
 317
 318 int EMVSearchPSE(bool ActivateField, bool LeaveFieldON, bool decodeTLV, struct tlvdb *tlv) {
 319         uint8_t data[APDU_RES_LEN] = {0};
 320         size_t datalen = 0;
 321         uint16_t sw = 0;
 322         int res;
 323
 324         // select PPSE
 325         res = EMVSelectPSE(ActivateField, true, 2, data, sizeof(data), &datalen, &sw);
 326
 327         if (!res){
 328                 struct tlvdb *t = NULL;
 329                 t = tlvdb_parse_multi(data, datalen);
 330                 if (t) {
 331                         int retrycnt = 0;
 332                         struct tlvdb *ttmp = tlvdb_find_path(t, (tlv_tag_t[]){0x6f, 0xa5, 0xbf0c, 0x61, 0x00});
 333                         if (!ttmp)
 334                                 PrintAndLog("PPSE don't have records.");
 335
 336                         while (ttmp) {
 337                                 const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x4f, NULL);
 338                                 if (tgAID) {
 339                                         res = EMVSelect(false, true, (uint8_t *)tgAID->value, tgAID->len, data, sizeof(data), &datalen, &sw, tlv);
 340
 341                                         // retry if error and not returned sw error
 342                                         if (res && res != 5) {
 343                                                 if (++retrycnt < 3){
 344                                                         continue;
 345                                                 } else {
 346                                                         // card select error, proxmark error
 347                                                         if (res == 1) {
 348                                                                 PrintAndLog("Exit...");
 349                                                                 return 1;
 350                                                         }
 351
 352                                                         retrycnt = 0;
 353                                                         PrintAndLog("Retry failed [%s]. Skiped...", sprint_hex_inrow(tgAID->value, tgAID->len));
 354                                                 }
 355
 356                                                 // next element
 357                                                 ttmp = tlvdb_find_next(ttmp, 0x61);
 358                                                 continue;
 359                                         }
 360                                         retrycnt = 0;
 361
 362                                         // all is ok
 363                                         if (decodeTLV){
 364                                                 PrintAndLog("%s:", sprint_hex_inrow(tgAID->value, tgAID->len));
 365                                                 TLVPrintFromBuffer(data, datalen);
 366                                         }
 367                                 }
 368
 369                                 ttmp = tlvdb_find_next(ttmp, 0x61);
 370                         }
 371
 372                         tlvdb_free(t);
 373                 } else {
 374                         PrintAndLog("PPSE ERROR: Can't get TLV from response.");
 375                 }
 376         } else {
 377                 PrintAndLog("PPSE ERROR: Can't select PPSE AID. Error: %d", res);
 378         }
 379
 380         if(!LeaveFieldON)
 381                 DropField();
 382
 383         return res;
 384 }
 385
 386 int EMVSearch(bool ActivateField, bool LeaveFieldON, bool decodeTLV, struct tlvdb *tlv) {
 387         uint8_t aidbuf[APDU_AID_LEN] = {0};
 388         int aidlen = 0;
 389         uint8_t data[APDU_RES_LEN] = {0};
 390         size_t datalen = 0;
 391         uint16_t sw = 0;
 392
 393         int res = 0;
 394         int retrycnt = 0;
 395         for(int i = 0; i < AIDlistLen; i ++) {
 396                 param_gethex_to_eol(AIDlist[i].aid, 0, aidbuf, sizeof(aidbuf), &aidlen);
 397                 res = EMVSelect((i == 0) ? ActivateField : false, (i == AIDlistLen - 1) ? LeaveFieldON : true, aidbuf, aidlen, data, sizeof(data), &datalen, &sw, tlv);
 398                 // retry if error and not returned sw error
 399                 if (res && res != 5) {
 400                         if (++retrycnt < 3){
 401                                 i--;
 402                         } else {
 403                                 // card select error, proxmark error
 404                                 if (res == 1) {
 405                                         PrintAndLog("Exit...");
 406                                         return 1;
 407                                 }
 408
 409                                 retrycnt = 0;
 410                                 PrintAndLog("Retry failed [%s]. Skiped...", AIDlist[i].aid);
 411                         }
 412                         continue;
 413                 }
 414                 retrycnt = 0;
 415
 416                 if (res)
 417                         continue;
 418
 419                 if (decodeTLV){
 420                         PrintAndLog("%s:", AIDlist[i].aid);
 421                         TLVPrintFromBuffer(data, datalen);
 422                 }
 423         }
 424
 425         return 0;
 426 }
 427
 428 int EMVSelectApplication(struct tlvdb *tlv, uint8_t *AID, size_t *AIDlen) {
 429         // check priority. 0x00 - highest
 430         int prio = 0xffff;
 431
 432         *AIDlen = 0;
 433
 434         struct tlvdb *ttmp = tlvdb_find(tlv, 0x6f);
 435         if (!ttmp)
 436                 return 1;
 437
 438         while (ttmp) {
 439                 const struct tlv *tgAID = tlvdb_get_inchild(ttmp, 0x84, NULL);
 440                 const struct tlv *tgPrio = tlvdb_get_inchild(ttmp, 0x87, NULL);
 441
 442                 if (!tgAID)
 443                         break;
 444
 445                 if (tgPrio) {
 446                         int pt = bytes_to_num((uint8_t*)tgPrio->value, (tgPrio->len < 2) ? tgPrio->len : 2);
 447                         if (pt < prio) {
 448                                 prio = pt;
 449
 450                                 memcpy(AID, tgAID->value, tgAID->len);
 451                                 *AIDlen = tgAID->len;
 452                         }
 453                 } else {
 454                         // takes the first application from list wo priority
 455                         if (!*AIDlen) {
 456                         memcpy(AID, tgAID->value, tgAID->len);
 457                         *AIDlen = tgAID->len;
 458                         }
 459                 }
 460
 461                 ttmp = tlvdb_find_next(ttmp, 0x6f);
 462         }
 463
 464         return 0;
 465 }
 466
 467 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) {
 468         return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0xa8, 0x00, 0x00, PDOLLen, PDOL}, Result, MaxResultLen, ResultLen, sw, tlv);
 469 }
 470
 471 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) {
 472         int res = EMVExchange(LeaveFieldON, (sAPDU){0x00, 0xb2, SFIrec, (SFI << 3) | 0x04, 0, NULL}, Result, MaxResultLen, ResultLen, sw, tlv);
 473         if (*sw == 0x6700) {
 474                 PrintAndLog(">>> trying to reissue command withouth Le...");
 475                 res = EMVExchangeEx(false, LeaveFieldON, (sAPDU){0x00, 0xb2, SFIrec, (SFI << 3) | 0x04, 0, NULL}, false, Result, MaxResultLen, ResultLen, sw, tlv);
 476         }
 477         return res;
 478 }
 479
 480 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) {
 481         return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0xae, RefControl, 0x00, CDOLLen, CDOL}, Result, MaxResultLen, ResultLen, sw, tlv);
 482 }
 483
 484 int EMVGenerateChallenge(bool LeaveFieldON, uint8_t *Result, size_t MaxResultLen, size_t *ResultLen, uint16_t *sw, struct tlvdb *tlv) {
 485         int res = EMVExchange(LeaveFieldON, (sAPDU){0x00, 0x84, 0x00, 0x00, 0x00, NULL}, Result, MaxResultLen, ResultLen, sw, tlv);
 486         if (*sw == 0x6700) {
 487                 PrintAndLog(">>> trying to reissue command withouth Le...");
 488                 res = EMVExchangeEx(false, LeaveFieldON, (sAPDU){0x00, 0x84, 0x00, 0x00, 0x00, NULL}, false, Result, MaxResultLen, ResultLen, sw, tlv);
 489         }
 490         return res;
 491 }
 492
 493 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) {
 494         return EMVExchange(LeaveFieldON, (sAPDU){0x00, 0x88, 0x00, 0x00, DDOLLen, DDOL}, Result, MaxResultLen, ResultLen, sw, tlv);
 495 }
 496
 497 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) {
 498         return EMVExchange(LeaveFieldON, (sAPDU){0x80, 0x2a, 0x8e, 0x80, UDOLlen, UDOL}, Result, MaxResultLen, ResultLen, sw, tlv);
 499 }
 500
 501 // Authentication
 502 static struct emv_pk *get_ca_pk(struct tlvdb *db) {
 503         const struct tlv *df_tlv = tlvdb_get(db, 0x84, NULL);
 504         const struct tlv *caidx_tlv = tlvdb_get(db, 0x8f, NULL);
 505
 506         if (!df_tlv || !caidx_tlv || df_tlv->len < 6 || caidx_tlv->len != 1)
 507                 return NULL;
 508
 509         PrintAndLog("CA public key index 0x%0x", caidx_tlv->value[0]);
 510         return emv_pk_get_ca_pk(df_tlv->value, caidx_tlv->value[0]);
 511 }
 512
 513 int trSDA(struct tlvdb *tlv) {
 514
 515         struct emv_pk *pk = get_ca_pk(tlv);
 516         if (!pk) {
 517                 PrintAndLog("ERROR: Key not found. Exit.");
 518                 return 2;
 519         }
 520
 521         struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
 522         if (!issuer_pk) {
 523                 emv_pk_free(pk);
 524                 PrintAndLog("ERROR: Issuer certificate not found. Exit.");
 525                 return 2;
 526         }
 527
 528         PrintAndLog("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx",
 529                 issuer_pk->rid[0],
 530                 issuer_pk->rid[1],
 531                 issuer_pk->rid[2],
 532                 issuer_pk->rid[3],
 533                 issuer_pk->rid[4],
 534                 issuer_pk->index,
 535                 issuer_pk->serial[0],
 536                 issuer_pk->serial[1],
 537                 issuer_pk->serial[2]
 538                 );
 539
 540         const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
 541         if (!sda_tlv || sda_tlv->len < 1) {
 542                 emv_pk_free(issuer_pk);
 543                 emv_pk_free(pk);
 544                 PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
 545                 return 3;
 546         }
 547
 548         struct tlvdb *dac_db = emv_pki_recover_dac(issuer_pk, tlv, sda_tlv);
 549         if (dac_db) {
 550                 const struct tlv *dac_tlv = tlvdb_get(dac_db, 0x9f45, NULL);
 551                 PrintAndLog("SDA verified OK. (%02hhx:%02hhx)\n", dac_tlv->value[0], dac_tlv->value[1]);
 552                 tlvdb_add(tlv, dac_db);
 553         } else {
 554                 emv_pk_free(issuer_pk);
 555                 emv_pk_free(pk);
 556                 PrintAndLog("ERROR: SSAD verify error");
 557                 return 4;
 558         }
 559
 560         emv_pk_free(issuer_pk);
 561         emv_pk_free(pk);
 562         return 0;
 563 }
 564
 565 static const unsigned char default_ddol_value[] = {0x9f, 0x37, 0x04};
 566 static struct tlv default_ddol_tlv = {.tag = 0x9f49, .len = 3, .value = default_ddol_value };
 567
 568 int trDDA(bool decodeTLV, struct tlvdb *tlv) {
 569         uint8_t buf[APDU_RES_LEN] = {0};
 570         size_t len = 0;
 571         uint16_t sw = 0;
 572
 573         struct emv_pk *pk = get_ca_pk(tlv);
 574         if (!pk) {
 575                 PrintAndLog("ERROR: Key not found. Exit.");
 576                 return 2;
 577         }
 578
 579         const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
 580         if (!sda_tlv || sda_tlv->len < 1) {
 581                 emv_pk_free(pk);
 582                 PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
 583                 return 3;
 584         }
 585
 586         struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
 587         if (!issuer_pk) {
 588                 emv_pk_free(pk);
 589                 PrintAndLog("ERROR: Issuer certificate not found. Exit.");
 590                 return 2;
 591         }
 592         printf("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 593                         issuer_pk->rid[0],
 594                         issuer_pk->rid[1],
 595                         issuer_pk->rid[2],
 596                         issuer_pk->rid[3],
 597                         issuer_pk->rid[4],
 598                         issuer_pk->index,
 599                         issuer_pk->serial[0],
 600                         issuer_pk->serial[1],
 601                         issuer_pk->serial[2]
 602                         );
 603
 604         struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlv, sda_tlv);
 605         if (!icc_pk) {
 606                 emv_pk_free(pk);
 607                 emv_pk_free(issuer_pk);
 608                 PrintAndLog("ERROR: ICC setrificate not found. Exit.");
 609                 return 2;
 610         }
 611         printf("ICC PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 612                         icc_pk->rid[0],
 613                         icc_pk->rid[1],
 614                         icc_pk->rid[2],
 615                         icc_pk->rid[3],
 616                         icc_pk->rid[4],
 617                         icc_pk->index,
 618                         icc_pk->serial[0],
 619                         icc_pk->serial[1],
 620                         icc_pk->serial[2]
 621                         );
 622
 623         struct emv_pk *icc_pe_pk = emv_pki_recover_icc_pe_cert(issuer_pk, tlv);
 624         if (!icc_pe_pk) {
 625                 PrintAndLog("WARNING: ICC PE PK recover error. ");
 626         } else {
 627                 printf("ICC PE PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 628                                 icc_pe_pk->rid[0],
 629                                 icc_pe_pk->rid[1],
 630                                 icc_pe_pk->rid[2],
 631                                 icc_pe_pk->rid[3],
 632                                 icc_pe_pk->rid[4],
 633                                 icc_pe_pk->index,
 634                                 icc_pe_pk->serial[0],
 635                                 icc_pe_pk->serial[1],
 636                                 icc_pe_pk->serial[2]
 637                                 );
 638         }
 639
 640         // 9F4B: Signed Dynamic Application Data
 641         const struct tlv *sdad_tlv = tlvdb_get(tlv, 0x9f4b, NULL);
 642         // DDA with internal authenticate OR fDDA with filled 0x9F4B tag (GPO result)
 643         // EMV kernel3 v2.4, contactless book C-3, C.1., page 147
 644         if (sdad_tlv) {
 645                 PrintAndLog("\n* * Got Signed Dynamic Application Data (9F4B) form GPO. Maybe fDDA...");
 646
 647                 const struct tlvdb *atc_db = emv_pki_recover_atc_ex(icc_pk, tlv, true);
 648                 if (!atc_db) {
 649                         PrintAndLog("ERROR: Can't recover IDN (ICC Dynamic Number)");
 650                         emv_pk_free(pk);
 651                         emv_pk_free(issuer_pk);
 652                         emv_pk_free(icc_pk);
 653                         return 8;
 654                 }
 655
 656                 // 9f36 Application Transaction Counter (ATC)
 657                 const struct tlv *atc_tlv = tlvdb_get(atc_db, 0x9f36, NULL);
 658                 if(atc_tlv) {
 659                         PrintAndLog("\nATC (Application Transaction Counter) [%zu] %s", atc_tlv->len, sprint_hex_inrow(atc_tlv->value, atc_tlv->len));
 660
 661                         const struct tlv *core_atc_tlv = tlvdb_get(tlv, 0x9f36, NULL);
 662                         if(tlv_equal(core_atc_tlv, atc_tlv)) {
 663                                 PrintAndLog("ATC check OK.");
 664                                 PrintAndLog("fDDA (fast DDA) verified OK.");
 665                         } else {
 666                                 PrintAndLog("ERROR: fDDA verified, but ATC in the certificate and ATC in the record not the same.");
 667                         }
 668                 } else {
 669                         PrintAndLog("\nERROR: fDDA (fast DDA) verify error");
 670                         emv_pk_free(pk);
 671                         emv_pk_free(issuer_pk);
 672                         emv_pk_free(icc_pk);
 673                         return 9;
 674                 }
 675         } else {
 676                 struct tlvdb *dac_db = emv_pki_recover_dac(issuer_pk, tlv, sda_tlv);
 677                 if (dac_db) {
 678                         const struct tlv *dac_tlv = tlvdb_get(dac_db, 0x9f45, NULL);
 679                         printf("SDA verified OK. (%02hhx:%02hhx)\n", dac_tlv->value[0], dac_tlv->value[1]);
 680                         tlvdb_add(tlv, dac_db);
 681                 } else {
 682                         PrintAndLog("ERROR: SSAD verify error");
 683                         emv_pk_free(pk);
 684                         emv_pk_free(issuer_pk);
 685                         emv_pk_free(icc_pk);
 686                         return 4;
 687                 }
 688
 689                 PrintAndLog("\n* Calc DDOL");
 690                 const struct tlv *ddol_tlv = tlvdb_get(tlv, 0x9f49, NULL);
 691                 if (!ddol_tlv) {
 692                         ddol_tlv = &default_ddol_tlv;
 693                         PrintAndLog("DDOL [9f49] not found. Using default DDOL");
 694                 }
 695
 696                 struct tlv *ddol_data_tlv = dol_process(ddol_tlv, tlv, 0);
 697                 if (!ddol_data_tlv) {
 698                         PrintAndLog("ERROR: Can't create DDOL TLV");
 699                         emv_pk_free(pk);
 700                         emv_pk_free(issuer_pk);
 701                         emv_pk_free(icc_pk);
 702                         return 5;
 703                 }
 704
 705                 PrintAndLog("DDOL data[%d]: %s", ddol_data_tlv->len, sprint_hex(ddol_data_tlv->value, ddol_data_tlv->len));
 706
 707                 PrintAndLog("\n* Internal Authenticate");
 708                 int res = EMVInternalAuthenticate(true, (uint8_t *)ddol_data_tlv->value, ddol_data_tlv->len, buf, sizeof(buf), &len, &sw, NULL);
 709                 if (res) {
 710                         PrintAndLog("Internal Authenticate error(%d): %4x. Exit...", res, sw);
 711                         free(ddol_data_tlv);
 712                         emv_pk_free(pk);
 713                         emv_pk_free(issuer_pk);
 714                         emv_pk_free(icc_pk);
 715                         return 6;
 716                 }
 717
 718                 struct tlvdb *dda_db = NULL;
 719                 if (buf[0] == 0x80) {
 720                         if (len < 3 ) {
 721                                 PrintAndLog("ERROR: Internal Authenticate format1 parsing error. length=%d", len);
 722                         } else {
 723                                 // 9f4b Signed Dynamic Application Data
 724                                 dda_db = tlvdb_fixed(0x9f4b, len - 2, buf + 2);
 725                                 tlvdb_add(tlv, dda_db);
 726                                 if (decodeTLV){
 727                                         PrintAndLog("* * Decode response format 1:");
 728                                         TLVPrintFromTLV(dda_db);
 729                                 }
 730                         }
 731                 } else {
 732                         dda_db = tlvdb_parse_multi(buf, len);
 733                         if(!dda_db) {
 734                                 PrintAndLog("ERROR: Can't parse Internal Authenticate result as TLV");
 735                                 free(ddol_data_tlv);
 736                                 emv_pk_free(pk);
 737                                 emv_pk_free(issuer_pk);
 738                                 emv_pk_free(icc_pk);
 739                                 return 7;
 740                         }
 741                         tlvdb_add(tlv, dda_db);
 742
 743                         if (decodeTLV)
 744                                 TLVPrintFromTLV(dda_db);
 745                 }
 746
 747                 struct tlvdb *idn_db = emv_pki_recover_idn_ex(icc_pk, dda_db, ddol_data_tlv, true);
 748                 free(ddol_data_tlv);
 749                 if (!idn_db) {
 750                         PrintAndLog("ERROR: Can't recover IDN (ICC Dynamic Number)");
 751                         tlvdb_free(dda_db);
 752                         emv_pk_free(pk);
 753                         emv_pk_free(issuer_pk);
 754                         emv_pk_free(icc_pk);
 755                         return 8;
 756                 }
 757                 tlvdb_free(dda_db);
 758
 759                 // 9f4c ICC Dynamic Number
 760                 const struct tlv *idn_tlv = tlvdb_get(idn_db, 0x9f4c, NULL);
 761                 if(idn_tlv) {
 762                         PrintAndLog("\nIDN (ICC Dynamic Number) [%zu] %s", idn_tlv->len, sprint_hex_inrow(idn_tlv->value, idn_tlv->len));
 763                         PrintAndLog("DDA verified OK.");
 764                         tlvdb_add(tlv, idn_db);
 765                         tlvdb_free(idn_db);
 766                 } else {
 767                         PrintAndLog("\nERROR: DDA verify error");
 768                         tlvdb_free(idn_db);
 769
 770                         emv_pk_free(pk);
 771                         emv_pk_free(issuer_pk);
 772                         emv_pk_free(icc_pk);
 773                         return 9;
 774                 }
 775         }
 776
 777         emv_pk_free(pk);
 778         emv_pk_free(issuer_pk);
 779         emv_pk_free(icc_pk);
 780         return 0;
 781 }
 782
 783 int trCDA(struct tlvdb *tlv, struct tlvdb *ac_tlv, struct tlv *pdol_data_tlv, struct tlv *ac_data_tlv) {
 784
 785         struct emv_pk *pk = get_ca_pk(tlv);
 786         if (!pk) {
 787                 PrintAndLog("ERROR: Key not found. Exit.");
 788                 return 2;
 789         }
 790
 791         const struct tlv *sda_tlv = tlvdb_get(tlv, 0x21, NULL);
 792         if (!sda_tlv || sda_tlv->len < 1) {
 793                 PrintAndLog("ERROR: Can't find input list for Offline Data Authentication. Exit.");
 794                 emv_pk_free(pk);
 795                 return 3;
 796         }
 797
 798         struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlv);
 799         if (!issuer_pk) {
 800                 PrintAndLog("ERROR: Issuer certificate not found. Exit.");
 801                 emv_pk_free(pk);
 802                 return 2;
 803         }
 804         printf("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 805                         issuer_pk->rid[0],
 806                         issuer_pk->rid[1],
 807                         issuer_pk->rid[2],
 808                         issuer_pk->rid[3],
 809                         issuer_pk->rid[4],
 810                         issuer_pk->index,
 811                         issuer_pk->serial[0],
 812                         issuer_pk->serial[1],
 813                         issuer_pk->serial[2]
 814                         );
 815
 816         struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlv, sda_tlv);
 817         if (!icc_pk) {
 818                 PrintAndLog("ERROR: ICC setrificate not found. Exit.");
 819                 emv_pk_free(pk);
 820                 emv_pk_free(issuer_pk);
 821                 return 2;
 822         }
 823         printf("ICC PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 824                         icc_pk->rid[0],
 825                         icc_pk->rid[1],
 826                         icc_pk->rid[2],
 827                         icc_pk->rid[3],
 828                         icc_pk->rid[4],
 829                         icc_pk->index,
 830                         icc_pk->serial[0],
 831                         icc_pk->serial[1],
 832                         icc_pk->serial[2]
 833                         );
 834
 835         struct tlvdb *dac_db = emv_pki_recover_dac(issuer_pk, tlv, sda_tlv);
 836         if (dac_db) {
 837                 const struct tlv *dac_tlv = tlvdb_get(dac_db, 0x9f45, NULL);
 838                 PrintAndLog("SSAD verified OK. (%02hhx:%02hhx)", dac_tlv->value[0], dac_tlv->value[1]);
 839                 tlvdb_add(tlv, dac_db);
 840         } else {
 841                 PrintAndLog("ERROR: SSAD verify error");
 842                 emv_pk_free(pk);
 843                 emv_pk_free(issuer_pk);
 844                 emv_pk_free(icc_pk);
 845                 return 4;
 846         }
 847
 848         PrintAndLog("\n* * Check Signed Dynamic Application Data (SDAD)");
 849         struct tlvdb *idn_db = emv_pki_perform_cda_ex(icc_pk, tlv, ac_tlv,
 850                         pdol_data_tlv, // pdol
 851                         ac_data_tlv,   // cdol1
 852                         NULL,          // cdol2
 853                         true);
 854         if (idn_db) {
 855                 const struct tlv *idn_tlv = tlvdb_get(idn_db, 0x9f4c, NULL);
 856                 PrintAndLog("\nIDN (ICC Dynamic Number) [%zu] %s", idn_tlv->len, sprint_hex_inrow(idn_tlv->value, idn_tlv->len));
 857                 PrintAndLog("CDA verified OK.");
 858                 tlvdb_add(tlv, idn_db);
 859         } else {
 860                 PrintAndLog("\nERROR: CDA verify error");
 861         }
 862
 863         emv_pk_free(pk);
 864         emv_pk_free(issuer_pk);
 865         emv_pk_free(icc_pk);
 866         return 0;
 867 }
 868
 869 int RecoveryCertificates(struct tlvdb *tlvRoot, json_t *root) {
 870
 871         struct emv_pk *pk = get_ca_pk(tlvRoot);
 872         if (!pk) {
 873                 PrintAndLog("ERROR: Key not found. Exit.");
 874                 return 1;
 875         }
 876
 877         struct emv_pk *issuer_pk = emv_pki_recover_issuer_cert(pk, tlvRoot);
 878         if (!issuer_pk) {
 879                 emv_pk_free(pk);
 880                 PrintAndLog("WARNING: Issuer certificate not found. Exit.");
 881                 return 2;
 882         }
 883         PrintAndLog("Issuer PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx",
 884                         issuer_pk->rid[0],
 885                         issuer_pk->rid[1],
 886                         issuer_pk->rid[2],
 887                         issuer_pk->rid[3],
 888                         issuer_pk->rid[4],
 889                         issuer_pk->index,
 890                         issuer_pk->serial[0],
 891                         issuer_pk->serial[1],
 892                         issuer_pk->serial[2]
 893                         );
 894
 895         JsonSaveBufAsHex(root, "$.ApplicationData.RID", issuer_pk->rid, 5);
 896
 897         char *issuer_pk_c = emv_pk_dump_pk(issuer_pk);
 898         JsonSaveStr(root, "$.ApplicationData.IssuerPublicKeyDec", issuer_pk_c);
 899         JsonSaveBufAsHex(root, "$.ApplicationData.IssuerPublicKeyModulus", issuer_pk->modulus, issuer_pk->mlen);
 900         free(issuer_pk_c);
 901
 902         struct emv_pk *icc_pk = emv_pki_recover_icc_cert(issuer_pk, tlvRoot, NULL);
 903         if (!icc_pk) {
 904                 emv_pk_free(pk);
 905                 emv_pk_free(issuer_pk);
 906                 PrintAndLog("WARNING: ICC certificate not found. Exit.");
 907                 return 2;
 908         }
 909         printf("ICC PK recovered. RID %02hhx:%02hhx:%02hhx:%02hhx:%02hhx IDX %02hhx CSN %02hhx:%02hhx:%02hhx\n",
 910                         icc_pk->rid[0],
 911                         icc_pk->rid[1],
 912                         icc_pk->rid[2],
 913                         icc_pk->rid[3],
 914                         icc_pk->rid[4],
 915                         icc_pk->index,
 916                         icc_pk->serial[0],
 917                         icc_pk->serial[1],
 918                         icc_pk->serial[2]
 919                         );
 920
 921         char *icc_pk_c = emv_pk_dump_pk(icc_pk);
 922         JsonSaveStr(root, "$.ApplicationData.ICCPublicKeyDec", icc_pk_c);
 923         JsonSaveBufAsHex(root, "$.ApplicationData.ICCPublicKeyModulus", icc_pk->modulus, icc_pk->mlen);
 924         free(issuer_pk_c);
 925
 926         return 0;
 927 }