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