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

   1 /*
   2  * libopenemv - a library to work with EMV family of smart cards
   3  * Copyright (C) 2015 Dmitry Eremin-Solenikov
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  */
  15
  16 #ifdef HAVE_CONFIG_H
  17 #include <config.h>
  18 #endif
  19
  20 #include "tlv.h"
  21 #include "emv_tags.h"
  22
  23 #include <stdlib.h>
  24
  25 #define PRINT_INDENT(level)     {for (int i = 0; i < (level); i++) fprintf(f, "\t");}
  26
  27 enum emv_tag_t {
  28         EMV_TAG_GENERIC,
  29         EMV_TAG_BITMASK,
  30         EMV_TAG_DOL,
  31         EMV_TAG_CVM_LIST,
  32         EMV_TAG_AFL,
  33         EMV_TAG_STRING,
  34         EMV_TAG_NUMERIC,
  35         EMV_TAG_YYMMDD,
  36 };
  37
  38 struct emv_tag {
  39         tlv_tag_t tag;
  40         char *name;
  41         enum emv_tag_t type;
  42         const void *data;
  43 };
  44
  45 struct emv_tag_bit {
  46         unsigned bit;
  47         const char *name;
  48 };
  49
  50 #define EMV_BIT(byte, bit) ((byte - 1) * 8 + (8 - bit))
  51 #define EMV_BIT_FINISH { (~0), NULL }
  52
  53 static const struct emv_tag_bit EMV_AIP[] = {
  54         { EMV_BIT(1, 7), "SDA supported" },
  55         { EMV_BIT(1, 6), "DDA supported" },
  56         { EMV_BIT(1, 5), "Cardholder verification is supported" },
  57         { EMV_BIT(1, 4), "Terminal risk management is to be performed" },
  58         { EMV_BIT(1, 3), "Issuer authentication is supported" },
  59         { EMV_BIT(1, 2), "Reserved for use by the EMV Contactless Specifications" },
  60         { EMV_BIT(1, 1), "CDA supported" },
  61         { EMV_BIT(2, 8), "MSD is supported (Magnetic Stripe Data)" },
  62         { EMV_BIT(2, 7), "Reserved for use by the EMV Contactless Specifications" },
  63         { EMV_BIT(2, 6), "Reserved for use by the EMV Contactless Specifications" },
  64         { EMV_BIT(2, 1), "Reserved for use by the EMV Contactless Specifications" },
  65         EMV_BIT_FINISH,
  66 };
  67
  68 static const struct emv_tag_bit EMV_AUC[] = {
  69         { EMV_BIT(1, 8), "Valid for domestic cash transactions" },
  70         { EMV_BIT(1, 7), "Valid for international cash transactions" },
  71         { EMV_BIT(1, 6), "Valid for domestic goods" },
  72         { EMV_BIT(1, 5), "Valid for international goods" },
  73         { EMV_BIT(1, 4), "Valid for domestic services" },
  74         { EMV_BIT(1, 3), "Valid for international services" },
  75         { EMV_BIT(1, 2), "Valid for ATMs" },
  76         { EMV_BIT(1, 1), "Valid at terminals other than ATMs" },
  77         { EMV_BIT(2, 8), "Domestic cashback allowed" },
  78         { EMV_BIT(2, 7), "International cashback allowed" },
  79         EMV_BIT_FINISH,
  80 };
  81
  82 static const struct emv_tag_bit EMV_TVR[] = {
  83         { EMV_BIT(1, 8), "Offline data authentication was not performed" },
  84         { EMV_BIT(1, 7), "SDA failed" },
  85         { EMV_BIT(1, 6), "ICC data missing" },
  86         { EMV_BIT(1, 5), "Card appears on terminal exception file" },
  87         { EMV_BIT(1, 4), "DDA failed" },
  88         { EMV_BIT(1, 3), "CDA failed" },
  89         { EMV_BIT(1, 2), "SDA selected" },
  90         { EMV_BIT(2, 8), "ICC and terminal have different application versions" },
  91         { EMV_BIT(2, 7), "Expired application" },
  92         { EMV_BIT(2, 6), "Application not yet effective" },
  93         { EMV_BIT(2, 5), "Requested service not allowed for card product" },
  94         { EMV_BIT(2, 4), "New card" },
  95         { EMV_BIT(3, 8), "Cardholder verification was not successful" },
  96         { EMV_BIT(3, 7), "Unrecognised CVM" },
  97         { EMV_BIT(3, 6), "PIN Try Limit exceeded" },
  98         { EMV_BIT(3, 5), "PIN entry required and PIN pad not present or not working" },
  99         { EMV_BIT(3, 4), "PIN entry required, PIN pad present, but PIN was not entered" },
 100         { EMV_BIT(3, 3), "Online PIN entered" },
 101         { EMV_BIT(4, 8), "Transaction exceeds floor limit" },
 102         { EMV_BIT(4, 7), "Lower consecutive offline limit exceeded" },
 103         { EMV_BIT(4, 6), "Upper consecutive offline limit exceeded" },
 104         { EMV_BIT(4, 5), "Transaction selected randomly for online processing" },
 105         { EMV_BIT(4, 4), "Merchant forced transaction online" },
 106         { EMV_BIT(5, 8), "Default TDOL used" },
 107         { EMV_BIT(5, 7), "Issuer authentication failed" },
 108         { EMV_BIT(5, 6), "Script processing failed before final GENERATE AC" },
 109         { EMV_BIT(5, 5), "Script processing failed after final GENERATE AC" },
 110         { EMV_BIT(5, 4), "Reserved for use by the EMV Contactless Specifications" },
 111         { EMV_BIT(5, 3), "Reserved for use by the EMV Contactless Specifications" },
 112         { EMV_BIT(5, 2), "Reserved for use by the EMV Contactless Specifications" },
 113         { EMV_BIT(5, 1), "Reserved for use by the EMV Contactless Specifications" },
 114         EMV_BIT_FINISH,
 115 };
 116
 117 static const struct emv_tag_bit EMV_CTQ[] = {
 118         { EMV_BIT(1, 8), "Online PIN Required" },
 119         { EMV_BIT(1, 7), "Signature Required" },
 120         { EMV_BIT(1, 6), "Go Online if Offline Data Authentication Fails and Reader is online capable" },
 121         { EMV_BIT(1, 5), "Switch Interface if Offline Data Authentication fails and Reader supports VIS" },
 122         { EMV_BIT(1, 4), "Go Online if Application Expired" },
 123         { EMV_BIT(1, 3), "Switch Interface for Cash Transactions" },
 124         { EMV_BIT(1, 2), "Switch Interface for Cashback Transactions" },
 125         { EMV_BIT(2, 8), "Consumer Device CVM Performed" },
 126         { EMV_BIT(2, 7), "Card supports Issuer Update Processing at the POS" },
 127         EMV_BIT_FINISH,
 128 };
 129
 130 static const struct emv_tag_bit EMV_TTQ[] = {
 131         { EMV_BIT(1, 8), "MSD supported" },
 132         { EMV_BIT(1, 7), "VSDC supported" },
 133         { EMV_BIT(1, 6), "qVSDC supported" },
 134         { EMV_BIT(1, 5), "EMV contact chip supported" },
 135         { EMV_BIT(1, 4), "Offline-only reader" },
 136         { EMV_BIT(1, 3), "Online PIN supported" },
 137         { EMV_BIT(1, 2), "Signature supported" },
 138         { EMV_BIT(1, 1), "Offline Data Authentication (ODA) for Online Authorizations supported\nWarning!!!! Readers compliant to this specification set TTQ byte 1 bit 1 (this field) to 0b" },
 139         { EMV_BIT(2, 8), "Online cryptogram required" },
 140         { EMV_BIT(2, 7), "CVM required" },
 141         { EMV_BIT(2, 6), "(Contact Chip) Offline PIN supported" },
 142         { EMV_BIT(3, 8), "Issuer Update Processing supported" },
 143         { EMV_BIT(3, 7), "Mobile functionality supported (Consumer Device CVM)" },
 144         EMV_BIT_FINISH,
 145 };
 146
 147 // All Data Elements by Tags used in TLV structure (according to the EMV 4.2 Standard )
 148 // https://www.eftlab.co.uk/index.php/site-map/knowledge-base/145-emv-nfc-tags
 149 // http://dexterous-programmer.blogspot.in/2012/05/emv-tags.html
 150 static const struct emv_tag emv_tags[] = {
 151         { 0x00  , "Unknown ???" },
 152         { 0x01  , "", EMV_TAG_STRING }, // string for headers
 153         { 0x41  , "Country code and national data" },
 154         { 0x42  , "Issuer Identification Number (IIN)" },
 155         { 0x4f  , "Application Dedicated File (ADF) Name" },
 156         { 0x50  , "Application Label", EMV_TAG_STRING },
 157         { 0x56  , "Track 1 Data" },
 158         { 0x57  , "Track 2 Equivalent Data" },
 159         { 0x5a  , "Application Primary Account Number (PAN)" },
 160         { 0x5f20, "Cardholder Name", EMV_TAG_STRING },
 161         { 0x5f24, "Application Expiration Date", EMV_TAG_YYMMDD },
 162         { 0x5f25, "Application Effective Date", EMV_TAG_YYMMDD },
 163         { 0x5f28, "Issuer Country Code", EMV_TAG_NUMERIC },
 164         { 0x5f2a, "Transaction Currency Code", EMV_TAG_NUMERIC },
 165         { 0x5f2d, "Language Preference", EMV_TAG_STRING },
 166         { 0x5f30, "Service Code", EMV_TAG_NUMERIC },
 167         { 0x5f34, "Application Primary Account Number (PAN) Sequence Number", EMV_TAG_NUMERIC },
 168         { 0x61  , "Application Template" },
 169         { 0x6f  , "File Control Information (FCI) Template" },
 170         { 0x70  , "READ RECORD Response Message Template" },
 171         { 0x77  , "Response Message Template Format 2" },
 172         { 0x80  , "Response Message Template Format 1" },
 173         { 0x82  , "Application Interchange Profile", EMV_TAG_BITMASK, &EMV_AIP },
 174         { 0x83  , "Command Template" },
 175         { 0x84  , "Dedicated File (DF) Name" },
 176         { 0x87  , "Application Priority Indicator" },
 177         { 0x88  , "Short File Identifier (SFI)" },
 178         { 0x8a  , "Authorisation Response Code" },
 179         { 0x8c  , "Card Risk Management Data Object List 1 (CDOL1)", EMV_TAG_DOL },
 180         { 0x8d  , "Card Risk Management Data Object List 2 (CDOL2)", EMV_TAG_DOL },
 181         { 0x8e  , "Cardholder Verification Method (CVM) List", EMV_TAG_CVM_LIST },
 182         { 0x8f  , "Certification Authority Public Key Index" },
 183         { 0x90  , "Issuer Public Key Certificate" },
 184         { 0x91  , "Issuer Authentication Data" },
 185         { 0x92  , "Issuer Public Key Remainder" },
 186         { 0x93  , "Signed Static Application Data" },
 187         { 0x94  , "Application File Locator (AFL)", EMV_TAG_AFL },
 188         { 0x95  , "Terminal Verification Results" },
 189         { 0x9a  , "Transaction Date", EMV_TAG_YYMMDD },
 190         { 0x9c  , "Transaction Type" },
 191         { 0x9f02, "Amount, Authorised (Numeric)", EMV_TAG_NUMERIC },
 192         { 0x9f03, "Amount, Other (Numeric)", EMV_TAG_NUMERIC, },
 193         { 0x9f06, "Application Identifier (AID), Terminal. ISO 7816-5" },
 194         { 0x9f07, "Application Usage Control", EMV_TAG_BITMASK, &EMV_AUC },
 195         { 0x9f08, "Application Version Number" },
 196         { 0x9f0d, "Issuer Action Code - Default", EMV_TAG_BITMASK, &EMV_TVR },
 197         { 0x9f0e, "Issuer Action Code - Denial", EMV_TAG_BITMASK, &EMV_TVR },
 198         { 0x9f0f, "Issuer Action Code - Online", EMV_TAG_BITMASK, &EMV_TVR },
 199         { 0x9f10, "Issuer Application Data" },
 200         { 0x9f11, "Issuer Code Table Index", EMV_TAG_NUMERIC },
 201         { 0x9f12, "Application Preferred Name", EMV_TAG_STRING },
 202         { 0x9f13, "Last Online Application Transaction Counter (ATC) Register" },
 203         { 0x9f17, "Personal Identification Number (PIN) Try Counter" },
 204         { 0x9f1a, "Terminal Country Code" },
 205         { 0x9f1f, "Track 1 Discretionary Data", EMV_TAG_STRING },
 206         { 0x9f21, "Transaction Time" },
 207         { 0x9f26, "Application Cryptogram" },
 208         { 0x9f27, "Cryptogram Information Data" },
 209         { 0x9f2a, "Kernel Identifier" },
 210         { 0x9f2d, "ICC PIN Encipherment Public Key Certificate" },
 211         { 0x9f2e, "ICC PIN Encipherment Public Key Exponent" },
 212         { 0x9f2f, "ICC PIN Encipherment Public Key Remainder" },
 213         { 0x9f32, "Issuer Public Key Exponent" },
 214         { 0x9f34, "Cardholder Verification Method (CVM) Results" },
 215         { 0x9f35, "Terminal Type" },
 216         { 0x9f36, "Application Transaction Counter (ATC)" },
 217         { 0x9f37, "Unpredictable Number" },
 218         { 0x9f38, "Processing Options Data Object List (PDOL)", EMV_TAG_DOL },
 219         { 0x9f42, "Application Currency Code", EMV_TAG_NUMERIC },
 220         { 0x9f44, "Application Currency Exponent", EMV_TAG_NUMERIC },
 221         { 0x9f45, "Data Authentication Code" },
 222         { 0x9f46, "ICC Public Key Certificate" },
 223         { 0x9f47, "ICC Public Key Exponent" },
 224         { 0x9f48, "ICC Public Key Remainder" },
 225         { 0x9f49, "Dynamic Data Authentication Data Object List (DDOL)", EMV_TAG_DOL },
 226         { 0x9f4a, "Static Data Authentication Tag List" },
 227         { 0x9f4b, "Signed Dynamic Application Data" },
 228         { 0x9f4c, "ICC Dynamic Number" },
 229         { 0x9f4d, "Log Entry" },
 230         { 0x9f4f, "Log Format", EMV_TAG_DOL },
 231         { 0x9f62, "PCVC3(Track1)" },
 232         { 0x9f63, "PUNATC(Track1)" },
 233         { 0x9f64, "NATC(Track1)" },
 234         { 0x9f65, "PCVC3(Track2)" },
 235         { 0x9f66, "PUNATC(Track2) / Terminal Transaction Qualifiers (TTQ)", EMV_TAG_BITMASK, &EMV_TTQ },
 236         { 0x9f67, "NATC(Track2) / MSD Offset" },
 237         { 0x9f69, "Card Authentication Related Data" },
 238         { 0x9f6a, "Unpredictable Number", EMV_TAG_NUMERIC },
 239         { 0x9f6b, "Track 2 Data" },
 240         { 0x9f6c, "Card Transaction Qualifiers (CTQ)", EMV_TAG_BITMASK, &EMV_CTQ },
 241         { 0xa5  , "File Control Information (FCI) Proprietary Template" },
 242         { 0xbf0c, "File Control Information (FCI) Issuer Discretionary Data" },
 243 };
 244
 245 static int emv_sort_tag(tlv_tag_t tag)
 246 {
 247         return (int)(tag >= 0x100 ? tag : tag << 8);
 248 }
 249
 250 static int emv_tlv_compare(const void *a, const void *b)
 251 {
 252         const struct tlv *tlv = a;
 253         const struct emv_tag *tag = b;
 254
 255         return emv_sort_tag(tlv->tag) - (emv_sort_tag(tag->tag));
 256 }
 257
 258 static const struct emv_tag *emv_get_tag(const struct tlv *tlv)
 259 {
 260         struct emv_tag *tag = bsearch(tlv, emv_tags, sizeof(emv_tags)/sizeof(emv_tags[0]),
 261                         sizeof(emv_tags[0]), emv_tlv_compare);
 262
 263         return tag ? tag : &emv_tags[0];
 264 }
 265
 266 static const char *bitstrings[] = {
 267         ".......1",
 268         "......1.",
 269         ".....1..",
 270         "....1...",
 271         "...1....",
 272         "..1.....",
 273         ".1......",
 274         "1.......",
 275 };
 276
 277 static void emv_tag_dump_bitmask(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
 278 {
 279         const struct emv_tag_bit *bits = tag->data;
 280         unsigned bit, byte;
 281
 282         for (byte = 1; byte <= tlv->len; byte ++) {
 283                 unsigned char val = tlv->value[byte - 1];
 284                 PRINT_INDENT(level);
 285                 fprintf(f, "\tByte %u (%02x)\n", byte, val);
 286                 for (bit = 8; bit > 0; bit--, val <<= 1) {
 287                         if (val & 0x80){
 288                                 PRINT_INDENT(level);
 289                                 fprintf(f, "\t\t%s - '%s'\n", bitstrings[bit - 1],
 290                                                 bits->bit == EMV_BIT(byte, bit) ? bits->name : "Unknown");
 291                         }
 292                         if (bits->bit == EMV_BIT(byte, bit))
 293                                 bits ++;
 294                 }
 295         }
 296 }
 297
 298 static void emv_tag_dump_dol(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
 299 {
 300         const unsigned char *buf = tlv->value;
 301         size_t left = tlv->len;
 302
 303         while (left) {
 304                 struct tlv doltlv;
 305                 const struct emv_tag *doltag;
 306
 307                 if (!tlv_parse_tl(&buf, &left, &doltlv)) {
 308                         PRINT_INDENT(level);
 309                         fprintf(f, "Invalid Tag-Len\n");
 310                         continue;
 311                 }
 312
 313                 doltag = emv_get_tag(&doltlv);
 314
 315                 PRINT_INDENT(level);
 316                 fprintf(f, "\tTag %4hx len %02zx ('%s')\n", doltlv.tag, doltlv.len, doltag->name);
 317         }
 318 }
 319
 320 static void emv_tag_dump_string(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
 321 {
 322         fprintf(f, "\tString value '");
 323         fwrite(tlv->value, 1, tlv->len, f);
 324         fprintf(f, "'\n");
 325 }
 326
 327 static unsigned long emv_value_numeric(const struct tlv *tlv, unsigned start, unsigned end)
 328 {
 329         unsigned long ret = 0;
 330         int i;
 331
 332         if (end > tlv->len * 2)
 333                 return ret;
 334         if (start >= end)
 335                 return ret;
 336
 337         if (start & 1) {
 338                 ret += tlv->value[start/2] & 0xf;
 339                 i = start + 1;
 340         } else
 341                 i = start;
 342
 343         for (; i < end - 1; i += 2) {
 344                 ret *= 10;
 345                 ret += tlv->value[i/2] >> 4;
 346                 ret *= 10;
 347                 ret += tlv->value[i/2] & 0xf;
 348         }
 349
 350         if (end & 1) {
 351                 ret *= 10;
 352                 ret += tlv->value[end/2] >> 4;
 353         }
 354
 355         return ret;
 356 }
 357
 358 static void emv_tag_dump_numeric(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
 359 {
 360         PRINT_INDENT(level);
 361         fprintf(f, "\tNumeric value %lu\n", emv_value_numeric(tlv, 0, tlv->len * 2));
 362 }
 363
 364 static void emv_tag_dump_yymmdd(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
 365 {
 366         PRINT_INDENT(level);
 367         fprintf(f, "\tDate: 20%02ld.%ld.%ld\n",
 368                         emv_value_numeric(tlv, 0, 2),
 369                         emv_value_numeric(tlv, 2, 4),
 370                         emv_value_numeric(tlv, 4, 6));
 371 }
 372
 373 static uint32_t emv_get_binary(const unsigned char *S)
 374 {
 375         return (S[0] << 24) | (S[1] << 16) | (S[2] << 8) | (S[3] << 0);
 376 }
 377
 378 static void emv_tag_dump_cvm_list(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
 379 {
 380         uint32_t X, Y;
 381         int i;
 382
 383         if (tlv->len < 10 || tlv->len % 2) {
 384                 PRINT_INDENT(level);
 385                 fprintf(f, "\tINVALID!\n");
 386                 return;
 387         }
 388
 389         X = emv_get_binary(tlv->value);
 390         Y = emv_get_binary(tlv->value + 4);
 391
 392         PRINT_INDENT(level);
 393         fprintf(f, "\tX: %d\n", X);
 394         PRINT_INDENT(level);
 395         fprintf(f, "\tY: %d\n", Y);
 396
 397         for (i = 8; i < tlv->len; i+= 2) {
 398                 const char *method;
 399                 const char *condition;
 400
 401                 switch (tlv->value[i] & 0x3f) {
 402                 case 0x0:
 403                         method = "Fail CVM processing";
 404                         break;
 405                 case 0x1:
 406                         method = "Plaintext PIN verification performed by ICC";
 407                         break;
 408                 case 0x2:
 409                         method = "Enciphered PIN verified online";
 410                         break;
 411                 case 0x3:
 412                         method = "Plaintext PIN verification performed by ICC and signature (paper)";
 413                         break;
 414                 case 0x4:
 415                         method = "Enciphered PIN verification performed by ICC";
 416                         break;
 417                 case 0x5:
 418                         method = "Enciphered PIN verification performed by ICC and signature (paper)";
 419                         break;
 420                 case 0x1e:
 421                         method = "Signature (paper)";
 422                         break;
 423                 case 0x1f:
 424                         method = "No CVM required";
 425                         break;
 426                 case 0x3f:
 427                         method = "NOT AVAILABLE!";
 428                         break;
 429                 default:
 430                         method = "Unknown";
 431                         break;
 432                 }
 433
 434                 switch (tlv->value[i+1]) {
 435                 case 0x00:
 436                         condition = "Always";
 437                         break;
 438                 case 0x01:
 439                         condition = "If unattended cash";
 440                         break;
 441                 case 0x02:
 442                         condition = "If not unattended cash and not manual cash and not purchase with cashback";
 443                         break;
 444                 case 0x03:
 445                         condition = "If terminal supports the CVM";
 446                         break;
 447                 case 0x04:
 448                         condition = "If manual cash";
 449                         break;
 450                 case 0x05:
 451                         condition = "If purchase with cashback";
 452                         break;
 453                 case 0x06:
 454                         condition = "If transaction is in the application currency and is under X value";
 455                         break;
 456                 case 0x07:
 457                         condition = "If transaction is in the application currency and is over X value";
 458                         break;
 459                 case 0x08:
 460                         condition = "If transaction is in the application currency and is under Y value";
 461                         break;
 462                 case 0x09:
 463                         condition = "If transaction is in the application currency and is over Y value";
 464                         break;
 465                 default:
 466                         condition = "Unknown";
 467                         break;
 468                 }
 469
 470                 PRINT_INDENT(level);
 471                 fprintf(f, "\t%02x %02x: '%s' '%s' and '%s' if this CVM is unsuccessful\n",
 472                                 tlv->value[i], tlv->value[i+1],
 473                                 method, condition, (tlv->value[i] & 0x40) ? "continue" : "fail");
 474         }
 475 }
 476
 477 static void emv_tag_dump_afl(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level){
 478         if (tlv->len < 4 || tlv->len % 4) {
 479                 PRINT_INDENT(level);
 480                 fprintf(f, "\tINVALID!\n");
 481                 return;
 482         }
 483
 484         for (int i = 0; i < tlv->len / 4; i++) {
 485                 PRINT_INDENT(level);
 486                 fprintf(f, "SFI[%02x] start:%02x end:%02x offline:%02x\n", tlv->value[i * 4 + 0] >> 3, tlv->value[i * 4 + 1], tlv->value[i * 4 + 2], tlv->value[i * 4 + 3]);
 487         }
 488 }
 489
 490 bool emv_tag_dump(const struct tlv *tlv, FILE *f, int level)
 491 {
 492         if (!tlv) {
 493                 fprintf(f, "NULL\n");
 494                 return false;
 495         }
 496
 497         const struct emv_tag *tag = emv_get_tag(tlv);
 498
 499         PRINT_INDENT(level);
 500         fprintf(f, "--%2hx[%02zx] '%s':", tlv->tag, tlv->len, tag->name);
 501
 502         switch (tag->type) {
 503         case EMV_TAG_GENERIC:
 504                 fprintf(f, "\n");
 505                 break;
 506         case EMV_TAG_BITMASK:
 507                 fprintf(f, "\n");
 508                 emv_tag_dump_bitmask(tlv, tag, f, level);
 509                 break;
 510         case EMV_TAG_DOL:
 511                 fprintf(f, "\n");
 512                 emv_tag_dump_dol(tlv, tag, f, level);
 513                 break;
 514         case EMV_TAG_CVM_LIST:
 515                 fprintf(f, "\n");
 516                 emv_tag_dump_cvm_list(tlv, tag, f, level);
 517                 break;
 518         case EMV_TAG_AFL:
 519                 fprintf(f, "\n");
 520                 emv_tag_dump_afl(tlv, tag, f, level);
 521                 break;
 522         case EMV_TAG_STRING:
 523                 emv_tag_dump_string(tlv, tag, f, level);
 524                 break;
 525         case EMV_TAG_NUMERIC:
 526                 emv_tag_dump_numeric(tlv, tag, f, level);
 527                 break;
 528         case EMV_TAG_YYMMDD:
 529                 emv_tag_dump_yymmdd(tlv, tag, f, level);
 530                 break;
 531         };
 532
 533         return true;
 534 }