89626cee60dffb36cc66cff203365107dbb01ecf
[proxmark3-svn] / 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 #include <string.h>
25
26 #define PRINT_INDENT(level) {for (int i = 0; i < (level); i++) fprintf(f, "\t");}
27
28 enum emv_tag_t {
29 EMV_TAG_GENERIC,
30 EMV_TAG_BITMASK,
31 EMV_TAG_DOL,
32 EMV_TAG_CVM_LIST,
33 EMV_TAG_AFL,
34 EMV_TAG_STRING,
35 EMV_TAG_NUMERIC,
36 EMV_TAG_YYMMDD,
37 EMV_TAG_CVR,
38 EMV_TAG_CID,
39 };
40
41 struct emv_tag {
42 tlv_tag_t tag;
43 char *name;
44 enum emv_tag_t type;
45 const void *data;
46 };
47
48 struct emv_tag_bit {
49 unsigned bit;
50 const char *name;
51 };
52
53 #define EMV_BIT(byte, bit) ((byte - 1) * 8 + (8 - bit))
54 #define EMV_BIT_FINISH { (~0), NULL }
55
56 static const struct emv_tag_bit EMV_AIP[] = {
57 { EMV_BIT(1, 7), "SDA supported" },
58 { EMV_BIT(1, 6), "DDA supported" },
59 { EMV_BIT(1, 5), "Cardholder verification is supported" },
60 { EMV_BIT(1, 4), "Terminal risk management is to be performed" },
61 { EMV_BIT(1, 3), "Issuer authentication is supported" },
62 { EMV_BIT(1, 2), "Reserved for use by the EMV Contactless Specifications" },
63 { EMV_BIT(1, 1), "CDA supported (Combined Dynamic Data Authentication / Application Cryptogram Generation)" },
64 { EMV_BIT(2, 8), "MSD is supported (Magnetic Stripe Data)" },
65 { EMV_BIT(2, 7), "Reserved for use by the EMV Contactless Specifications" },
66 { EMV_BIT(2, 6), "Reserved for use by the EMV Contactless Specifications" },
67 { EMV_BIT(2, 1), "Reserved for use by the EMV Contactless Specifications" },
68 EMV_BIT_FINISH,
69 };
70
71 static const struct emv_tag_bit EMV_AUC[] = {
72 { EMV_BIT(1, 8), "Valid for domestic cash transactions" },
73 { EMV_BIT(1, 7), "Valid for international cash transactions" },
74 { EMV_BIT(1, 6), "Valid for domestic goods" },
75 { EMV_BIT(1, 5), "Valid for international goods" },
76 { EMV_BIT(1, 4), "Valid for domestic services" },
77 { EMV_BIT(1, 3), "Valid for international services" },
78 { EMV_BIT(1, 2), "Valid for ATMs" },
79 { EMV_BIT(1, 1), "Valid at terminals other than ATMs" },
80 { EMV_BIT(2, 8), "Domestic cashback allowed" },
81 { EMV_BIT(2, 7), "International cashback allowed" },
82 EMV_BIT_FINISH,
83 };
84
85 static const struct emv_tag_bit EMV_TVR[] = {
86 { EMV_BIT(1, 8), "Offline data authentication was not performed" },
87 { EMV_BIT(1, 7), "SDA failed" },
88 { EMV_BIT(1, 6), "ICC data missing" },
89 { EMV_BIT(1, 5), "Card appears on terminal exception file" },
90 { EMV_BIT(1, 4), "DDA failed" },
91 { EMV_BIT(1, 3), "CDA failed" },
92 { EMV_BIT(1, 2), "SDA selected" },
93 { EMV_BIT(2, 8), "ICC and terminal have different application versions" },
94 { EMV_BIT(2, 7), "Expired application" },
95 { EMV_BIT(2, 6), "Application not yet effective" },
96 { EMV_BIT(2, 5), "Requested service not allowed for card product" },
97 { EMV_BIT(2, 4), "New card" },
98 { EMV_BIT(3, 8), "Cardholder verification was not successful" },
99 { EMV_BIT(3, 7), "Unrecognised CVM" },
100 { EMV_BIT(3, 6), "PIN Try Limit exceeded" },
101 { EMV_BIT(3, 5), "PIN entry required and PIN pad not present or not working" },
102 { EMV_BIT(3, 4), "PIN entry required, PIN pad present, but PIN was not entered" },
103 { EMV_BIT(3, 3), "Online PIN entered" },
104 { EMV_BIT(4, 8), "Transaction exceeds floor limit" },
105 { EMV_BIT(4, 7), "Lower consecutive offline limit exceeded" },
106 { EMV_BIT(4, 6), "Upper consecutive offline limit exceeded" },
107 { EMV_BIT(4, 5), "Transaction selected randomly for online processing" },
108 { EMV_BIT(4, 4), "Merchant forced transaction online" },
109 { EMV_BIT(5, 8), "Default TDOL used" },
110 { EMV_BIT(5, 7), "Issuer authentication failed" },
111 { EMV_BIT(5, 6), "Script processing failed before final GENERATE AC" },
112 { EMV_BIT(5, 5), "Script processing failed after final GENERATE AC" },
113 { EMV_BIT(5, 4), "Reserved for use by the EMV Contactless Specifications" },
114 { EMV_BIT(5, 3), "Reserved for use by the EMV Contactless Specifications" },
115 { EMV_BIT(5, 2), "Reserved for use by the EMV Contactless Specifications" },
116 { EMV_BIT(5, 1), "Reserved for use by the EMV Contactless Specifications" },
117 EMV_BIT_FINISH,
118 };
119
120 static const struct emv_tag_bit EMV_CTQ[] = {
121 { EMV_BIT(1, 8), "Online PIN Required" },
122 { EMV_BIT(1, 7), "Signature Required" },
123 { EMV_BIT(1, 6), "Go Online if Offline Data Authentication Fails and Reader is online capable" },
124 { EMV_BIT(1, 5), "Switch Interface if Offline Data Authentication fails and Reader supports VIS" },
125 { EMV_BIT(1, 4), "Go Online if Application Expired" },
126 { EMV_BIT(1, 3), "Switch Interface for Cash Transactions" },
127 { EMV_BIT(1, 2), "Switch Interface for Cashback Transactions" },
128 { EMV_BIT(2, 8), "Consumer Device CVM Performed" },
129 { EMV_BIT(2, 7), "Card supports Issuer Update Processing at the POS" },
130 EMV_BIT_FINISH,
131 };
132
133 static const struct emv_tag_bit EMV_TTQ[] = {
134 { EMV_BIT(1, 8), "MSD supported" },
135 { EMV_BIT(1, 7), "VSDC supported" },
136 { EMV_BIT(1, 6), "qVSDC supported" },
137 { EMV_BIT(1, 5), "EMV contact chip supported" },
138 { EMV_BIT(1, 4), "Offline-only reader" },
139 { EMV_BIT(1, 3), "Online PIN supported" },
140 { EMV_BIT(1, 2), "Signature supported" },
141 { 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" },
142 { EMV_BIT(2, 8), "Online cryptogram required" },
143 { EMV_BIT(2, 7), "CVM required" },
144 { EMV_BIT(2, 6), "(Contact Chip) Offline PIN supported" },
145 { EMV_BIT(3, 8), "Issuer Update Processing supported" },
146 { EMV_BIT(3, 7), "Mobile functionality supported (Consumer Device CVM)" },
147 EMV_BIT_FINISH,
148 };
149
150 static const struct emv_tag_bit EMV_CVR[] = {
151 // mask 0F 0F F0 0F
152 { EMV_BIT(1, 4), "CDA Performed" },
153 { EMV_BIT(1, 3), "Offline DDA Performed" },
154 { EMV_BIT(1, 2), "Issuer Authentication Not Performed" },
155 { EMV_BIT(1, 1), "Issuer Authentication performed and Failed" },
156 { EMV_BIT(2, 4), "Offline PIN Verification Performed" },
157 { EMV_BIT(2, 3), "Offline PIN Verification Performed and PIN Not Successfully Verified" },
158 { EMV_BIT(2, 2), "PIN Try Limit Exceeded" },
159 { EMV_BIT(2, 1), "Last Online Transaction Not Completed" },
160 { EMV_BIT(3, 8), "Lower Offline Transaction Count Limit Exceeded" },
161 { EMV_BIT(3, 7), "Upper Offline Transaction Count Limit Exceeded" },
162 { EMV_BIT(3, 6), "Lower Cumulative Offline Amount Limit Exceeded" },
163 { EMV_BIT(3, 5), "Upper Cumulative Offline Amount Limit Exceeded" },
164 { EMV_BIT(4, 4), "Issuer script processing failed on last transaction" },
165 { EMV_BIT(4, 3), "Offline data authentication failed on previous transaction and transaction declined offline" },
166 { EMV_BIT(4, 2), "Go Online on Next Transaction Was Set" },
167 { EMV_BIT(4, 1), "Unable to go Online" },
168 EMV_BIT_FINISH,
169 };
170
171 // All Data Elements by Tags used in TLV structure (according to the EMV 4.2 Standard )
172 // https://www.eftlab.co.uk/index.php/site-map/knowledge-base/145-emv-nfc-tags
173 // http://dexterous-programmer.blogspot.in/2012/05/emv-tags.html
174 static const struct emv_tag emv_tags[] = {
175 // internal
176 { 0x00 , "Unknown ???" },
177 { 0x01 , "", EMV_TAG_STRING }, // string for headers
178 { 0x02 , "Raw data", }, // data
179 { 0x20 , "Cardholder Verification Results (CVR)", EMV_TAG_CVR }, // not standard!
180
181 // EMV
182 { 0x41 , "Country code and national data" },
183 { 0x42 , "Issuer Identification Number (IIN)" },
184 { 0x4f , "Application Dedicated File (ADF) Name" },
185 { 0x50 , "Application Label", EMV_TAG_STRING },
186 { 0x56 , "Track 1 Data" },
187 { 0x57 , "Track 2 Equivalent Data" },
188 { 0x5a , "Application Primary Account Number (PAN)" },
189 { 0x5f20, "Cardholder Name", EMV_TAG_STRING },
190 { 0x5f24, "Application Expiration Date", EMV_TAG_YYMMDD },
191 { 0x5f25, "Application Effective Date", EMV_TAG_YYMMDD },
192 { 0x5f28, "Issuer Country Code", EMV_TAG_NUMERIC },
193 { 0x5f2a, "Transaction Currency Code", EMV_TAG_NUMERIC },
194 { 0x5f2d, "Language Preference", EMV_TAG_STRING },
195 { 0x5f30, "Service Code", EMV_TAG_NUMERIC },
196 { 0x5f34, "Application Primary Account Number (PAN) Sequence Number", EMV_TAG_NUMERIC },
197 { 0x61 , "Application Template" },
198 { 0x6f , "File Control Information (FCI) Template" },
199 { 0x70 , "READ RECORD Response Message Template" },
200 { 0x77 , "Response Message Template Format 2" },
201 { 0x80 , "Response Message Template Format 1" },
202 { 0x82 , "Application Interchange Profile", EMV_TAG_BITMASK, &EMV_AIP },
203 { 0x83 , "Command Template" },
204 { 0x84 , "Dedicated File (DF) Name" },
205 { 0x87 , "Application Priority Indicator" },
206 { 0x88 , "Short File Identifier (SFI)" },
207 { 0x8a , "Authorisation Response Code" },
208 { 0x8c , "Card Risk Management Data Object List 1 (CDOL1)", EMV_TAG_DOL },
209 { 0x8d , "Card Risk Management Data Object List 2 (CDOL2)", EMV_TAG_DOL },
210 { 0x8e , "Cardholder Verification Method (CVM) List", EMV_TAG_CVM_LIST },
211 { 0x8f , "Certification Authority Public Key Index" },
212 { 0x90 , "Issuer Public Key Certificate" },
213 { 0x91 , "Issuer Authentication Data" },
214 { 0x92 , "Issuer Public Key Remainder" },
215 { 0x93 , "Signed Static Application Data" },
216 { 0x94 , "Application File Locator (AFL)", EMV_TAG_AFL },
217 { 0x95 , "Terminal Verification Results" },
218 { 0x9a , "Transaction Date", EMV_TAG_YYMMDD },
219 { 0x9c , "Transaction Type" },
220 { 0x9f02, "Amount, Authorised (Numeric)", EMV_TAG_NUMERIC },
221 { 0x9f03, "Amount, Other (Numeric)", EMV_TAG_NUMERIC, },
222 { 0x9f06, "Application Identifier (AID), Terminal. ISO 7816-5" },
223 { 0x9f07, "Application Usage Control", EMV_TAG_BITMASK, &EMV_AUC },
224 { 0x9f08, "Application Version Number" },
225 { 0x9f0d, "Issuer Action Code - Default", EMV_TAG_BITMASK, &EMV_TVR },
226 { 0x9f0e, "Issuer Action Code - Denial", EMV_TAG_BITMASK, &EMV_TVR },
227 { 0x9f0f, "Issuer Action Code - Online", EMV_TAG_BITMASK, &EMV_TVR },
228 { 0x9f10, "Issuer Application Data" },
229 { 0x9f11, "Issuer Code Table Index", EMV_TAG_NUMERIC },
230 { 0x9f12, "Application Preferred Name", EMV_TAG_STRING },
231 { 0x9f13, "Last Online Application Transaction Counter (ATC) Register" },
232 { 0x9f17, "Personal Identification Number (PIN) Try Counter" },
233 { 0x9f1a, "Terminal Country Code" },
234 { 0x9f1f, "Track 1 Discretionary Data", EMV_TAG_STRING },
235 { 0x9f21, "Transaction Time" },
236 { 0x9f26, "Application Cryptogram" },
237 { 0x9f27, "Cryptogram Information Data", EMV_TAG_CID },
238 { 0x9f2a, "Kernel Identifier" },
239 { 0x9f2d, "ICC PIN Encipherment Public Key Certificate" },
240 { 0x9f2e, "ICC PIN Encipherment Public Key Exponent" },
241 { 0x9f2f, "ICC PIN Encipherment Public Key Remainder" },
242 { 0x9f32, "Issuer Public Key Exponent" },
243 { 0x9f34, "Cardholder Verification Method (CVM) Results" },
244 { 0x9f35, "Terminal Type" },
245 { 0x9f36, "Application Transaction Counter (ATC)" },
246 { 0x9f37, "Unpredictable Number" },
247 { 0x9f38, "Processing Options Data Object List (PDOL)", EMV_TAG_DOL },
248 { 0x9f42, "Application Currency Code", EMV_TAG_NUMERIC },
249 { 0x9f44, "Application Currency Exponent", EMV_TAG_NUMERIC },
250 { 0x9f45, "Data Authentication Code" },
251 { 0x9f46, "ICC Public Key Certificate" },
252 { 0x9f47, "ICC Public Key Exponent" },
253 { 0x9f48, "ICC Public Key Remainder" },
254 { 0x9f49, "Dynamic Data Authentication Data Object List (DDOL)", EMV_TAG_DOL },
255 { 0x9f4a, "Static Data Authentication Tag List" },
256 { 0x9f4b, "Signed Dynamic Application Data" },
257 { 0x9f4c, "ICC Dynamic Number" },
258 { 0x9f4d, "Log Entry" },
259 { 0x9f4f, "Log Format", EMV_TAG_DOL },
260 { 0x9f60, "CVC3 (Track1)" },
261 { 0x9f61, "CVC3 (Track2)" },
262 { 0x9f62, "PCVC3(Track1)" },
263 { 0x9f63, "PUNATC(Track1)" },
264 { 0x9f64, "NATC(Track1)" },
265 { 0x9f65, "PCVC3(Track2)" },
266 { 0x9f66, "PUNATC(Track2) / Terminal Transaction Qualifiers (TTQ)", EMV_TAG_BITMASK, &EMV_TTQ },
267 { 0x9f67, "NATC(Track2) / MSD Offset" },
268 { 0x9f69, "Card Authentication Related Data" },
269 { 0x9f6a, "Unpredictable Number", EMV_TAG_NUMERIC },
270 { 0x9f6b, "Track 2 Data" },
271 { 0x9f6c, "Card Transaction Qualifiers (CTQ)", EMV_TAG_BITMASK, &EMV_CTQ },
272 { 0xa5 , "File Control Information (FCI) Proprietary Template" },
273 { 0xbf0c, "File Control Information (FCI) Issuer Discretionary Data" },
274 { 0xdf20, "Issuer Proprietary Bitmap (IPB)" },
275 };
276
277 static int emv_sort_tag(tlv_tag_t tag)
278 {
279 return (int)(tag >= 0x100 ? tag : tag << 8);
280 }
281
282 static int emv_tlv_compare(const void *a, const void *b)
283 {
284 const struct tlv *tlv = a;
285 const struct emv_tag *tag = b;
286
287 return emv_sort_tag(tlv->tag) - (emv_sort_tag(tag->tag));
288 }
289
290 static const struct emv_tag *emv_get_tag(const struct tlv *tlv)
291 {
292 struct emv_tag *tag = bsearch(tlv, emv_tags, sizeof(emv_tags)/sizeof(emv_tags[0]),
293 sizeof(emv_tags[0]), emv_tlv_compare);
294
295 return tag ? tag : &emv_tags[0];
296 }
297
298 static const char *bitstrings[] = {
299 ".......1",
300 "......1.",
301 ".....1..",
302 "....1...",
303 "...1....",
304 "..1.....",
305 ".1......",
306 "1.......",
307 };
308
309 static void emv_tag_dump_bitmask(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
310 {
311 const struct emv_tag_bit *bits = tag->data;
312 unsigned bit, byte;
313
314 for (byte = 1; byte <= tlv->len; byte ++) {
315 unsigned char val = tlv->value[byte - 1];
316 PRINT_INDENT(level);
317 fprintf(f, "\tByte %u (%02x)\n", byte, val);
318 for (bit = 8; bit > 0; bit--, val <<= 1) {
319 if (val & 0x80){
320 PRINT_INDENT(level);
321 fprintf(f, "\t\t%s - '%s'\n", bitstrings[bit - 1],
322 bits->bit == EMV_BIT(byte, bit) ? bits->name : "Unknown");
323 }
324 if (bits->bit == EMV_BIT(byte, bit))
325 bits ++;
326 }
327 }
328 }
329
330 static void emv_tag_dump_dol(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
331 {
332 const unsigned char *buf = tlv->value;
333 size_t left = tlv->len;
334
335 while (left) {
336 struct tlv doltlv;
337 const struct emv_tag *doltag;
338
339 if (!tlv_parse_tl(&buf, &left, &doltlv)) {
340 PRINT_INDENT(level);
341 fprintf(f, "Invalid Tag-Len\n");
342 continue;
343 }
344
345 doltag = emv_get_tag(&doltlv);
346
347 PRINT_INDENT(level);
348 fprintf(f, "\tTag %4hx len %02zx ('%s')\n", doltlv.tag, doltlv.len, doltag->name);
349 }
350 }
351
352 static void emv_tag_dump_string(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
353 {
354 fprintf(f, "\tString value '");
355 fwrite(tlv->value, 1, tlv->len, f);
356 fprintf(f, "'\n");
357 }
358
359 static unsigned long emv_value_numeric(const struct tlv *tlv, unsigned start, unsigned end)
360 {
361 unsigned long ret = 0;
362 int i;
363
364 if (end > tlv->len * 2)
365 return ret;
366 if (start >= end)
367 return ret;
368
369 if (start & 1) {
370 ret += tlv->value[start/2] & 0xf;
371 i = start + 1;
372 } else
373 i = start;
374
375 for (; i < end - 1; i += 2) {
376 ret *= 10;
377 ret += tlv->value[i/2] >> 4;
378 ret *= 10;
379 ret += tlv->value[i/2] & 0xf;
380 }
381
382 if (end & 1) {
383 ret *= 10;
384 ret += tlv->value[end/2] >> 4;
385 }
386
387 return ret;
388 }
389
390 static void emv_tag_dump_numeric(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
391 {
392 PRINT_INDENT(level);
393 fprintf(f, "\tNumeric value %lu\n", emv_value_numeric(tlv, 0, tlv->len * 2));
394 }
395
396 static void emv_tag_dump_yymmdd(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
397 {
398 PRINT_INDENT(level);
399 fprintf(f, "\tDate: 20%02ld.%ld.%ld\n",
400 emv_value_numeric(tlv, 0, 2),
401 emv_value_numeric(tlv, 2, 4),
402 emv_value_numeric(tlv, 4, 6));
403 }
404
405 static uint32_t emv_get_binary(const unsigned char *S)
406 {
407 return (S[0] << 24) | (S[1] << 16) | (S[2] << 8) | (S[3] << 0);
408 }
409
410 // https://github.com/binaryfoo/emv-bertlv/blob/master/src/main/resources/fields/visa-cvr.txt
411 static void emv_tag_dump_cvr(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level) {
412 if (!tlv || tlv->len < 1) {
413 PRINT_INDENT(level);
414 fprintf(f, "\tINVALID!\n");
415 return;
416 }
417
418 if (tlv->len != tlv->value[0] + 1) {
419 PRINT_INDENT(level);
420 fprintf(f, "\tINVALID length!\n");
421 return;
422 }
423
424 if (tlv->len >= 2) {
425 // AC1
426 PRINT_INDENT(level);
427 if ((tlv->value[1] & 0xC0) == 0x00) fprintf(f, "\tAC1: AAC (Transaction declined)\n");
428 if ((tlv->value[1] & 0xC0) == 0x40) fprintf(f, "\tAC1: TC (Transaction approved)\n");
429 if ((tlv->value[1] & 0xC0) == 0x80) fprintf(f, "\tAC1: ARQC (Online authorisation requested)\n");
430 if ((tlv->value[1] & 0xC0) == 0xC0) fprintf(f, "\tAC1: RFU\n");
431 // AC2
432 PRINT_INDENT(level);
433 if ((tlv->value[1] & 0x30) == 0x00) fprintf(f, "\tAC2: AAC (Transaction declined)\n");
434 if ((tlv->value[1] & 0x30) == 0x10) fprintf(f, "\tAC2: TC (Transaction approved)\n");
435 if ((tlv->value[1] & 0x30) == 0x20) fprintf(f, "\tAC2: not requested (ARQC)\n");
436 if ((tlv->value[1] & 0x30) == 0x30) fprintf(f, "\tAC2: RFU\n");
437 }
438 if (tlv->len >= 3 && (tlv->value[2] >> 4)) {
439 PRINT_INDENT(level);
440 fprintf(f, "\tPIN try: %x\n", tlv->value[2] >> 4);
441 }
442 if (tlv->len >= 4 && (tlv->value[3] & 0x0F)) {
443 PRINT_INDENT(level);
444 fprintf(f, "\tIssuer discretionary bits: %x\n", tlv->value[3] & 0x0F);
445 }
446 if (tlv->len >= 5 && (tlv->value[4] >> 4)) {
447 PRINT_INDENT(level);
448 fprintf(f, "\tSuccessfully processed issuer script commands: %x\n", tlv->value[4] >> 4);
449 }
450
451 // mask 0F 0F F0 0F
452 uint8_t data[20] = {0};
453 memcpy(data, &tlv->value[1], tlv->len - 1);
454 data[0] &= 0x0F;
455 data[1] &= 0x0F;
456 data[2] &= 0xF0;
457 data[3] &= 0x0F;
458 const struct tlv bit_tlv = {
459 .tag = tlv->tag,
460 .len = tlv->len - 1,
461 .value = data,
462 };
463 const struct emv_tag bit_tag = {
464 .tag = tag->tag,
465 .name = tag->name,
466 .type = EMV_TAG_BITMASK,
467 .data = EMV_CVR,
468 };
469
470 if (data[0] || data[1] || data[2] || data[3])
471 emv_tag_dump_bitmask(&bit_tlv, &bit_tag, f, level);
472
473 return;
474 }
475
476 // EMV Book 3
477 static void emv_tag_dump_cid(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level) {
478 if (!tlv || tlv->len < 1) {
479 PRINT_INDENT(level);
480 fprintf(f, "\tINVALID!\n");
481 return;
482 }
483
484 PRINT_INDENT(level);
485 if ((tlv->value[0] & 0xC0) == 0x00) fprintf(f, "\tAC1: AAC (Transaction declined)\n");
486 if ((tlv->value[0] & 0xC0) == 0x40) fprintf(f, "\tAC1: TC (Transaction approved)\n");
487 if ((tlv->value[0] & 0xC0) == 0x80) fprintf(f, "\tAC1: ARQC (Online authorisation requested)\n");
488 if ((tlv->value[0] & 0xC0) == 0xC0) fprintf(f, "\tAC1: RFU\n");
489
490 if ((tlv->value[0] & 0x08) != 0x00) {
491 PRINT_INDENT(level);
492 fprintf(f, "\tAdvice required!\n");
493 }
494
495 if ((tlv->value[0] & 0x07) != 0x00) {
496 PRINT_INDENT(level);
497 fprintf(f, "\tReason/advice/referral code: ");
498 switch((tlv->value[0] & 0x07)) {
499 case 0:
500 fprintf(f, "No information given\n");
501 break;
502 case 1:
503 fprintf(f, "Service not allowed\n");
504 break;
505 case 2:
506 fprintf(f, "PIN Try Limit exceeded\n");
507 break;
508 case 3:
509 fprintf(f, "Issuer authentication failed\n");
510 break;
511 default:
512 fprintf(f, "\tRFU: %2x\n", (tlv->value[0] & 0x07));
513 break;
514 }
515 }
516
517 return;
518 }
519
520 static void emv_tag_dump_cvm_list(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level)
521 {
522 uint32_t X, Y;
523 int i;
524
525 if (tlv->len < 10 || tlv->len % 2) {
526 PRINT_INDENT(level);
527 fprintf(f, "\tINVALID!\n");
528 return;
529 }
530
531 X = emv_get_binary(tlv->value);
532 Y = emv_get_binary(tlv->value + 4);
533
534 PRINT_INDENT(level);
535 fprintf(f, "\tX: %d\n", X);
536 PRINT_INDENT(level);
537 fprintf(f, "\tY: %d\n", Y);
538
539 for (i = 8; i < tlv->len; i+= 2) {
540 const char *method;
541 const char *condition;
542
543 switch (tlv->value[i] & 0x3f) {
544 case 0x0:
545 method = "Fail CVM processing";
546 break;
547 case 0x1:
548 method = "Plaintext PIN verification performed by ICC";
549 break;
550 case 0x2:
551 method = "Enciphered PIN verified online";
552 break;
553 case 0x3:
554 method = "Plaintext PIN verification performed by ICC and signature (paper)";
555 break;
556 case 0x4:
557 method = "Enciphered PIN verification performed by ICC";
558 break;
559 case 0x5:
560 method = "Enciphered PIN verification performed by ICC and signature (paper)";
561 break;
562 case 0x1e:
563 method = "Signature (paper)";
564 break;
565 case 0x1f:
566 method = "No CVM required";
567 break;
568 case 0x3f:
569 method = "NOT AVAILABLE!";
570 break;
571 default:
572 method = "Unknown";
573 break;
574 }
575
576 switch (tlv->value[i+1]) {
577 case 0x00:
578 condition = "Always";
579 break;
580 case 0x01:
581 condition = "If unattended cash";
582 break;
583 case 0x02:
584 condition = "If not unattended cash and not manual cash and not purchase with cashback";
585 break;
586 case 0x03:
587 condition = "If terminal supports the CVM";
588 break;
589 case 0x04:
590 condition = "If manual cash";
591 break;
592 case 0x05:
593 condition = "If purchase with cashback";
594 break;
595 case 0x06:
596 condition = "If transaction is in the application currency and is under X value";
597 break;
598 case 0x07:
599 condition = "If transaction is in the application currency and is over X value";
600 break;
601 case 0x08:
602 condition = "If transaction is in the application currency and is under Y value";
603 break;
604 case 0x09:
605 condition = "If transaction is in the application currency and is over Y value";
606 break;
607 default:
608 condition = "Unknown";
609 break;
610 }
611
612 PRINT_INDENT(level);
613 fprintf(f, "\t%02x %02x: '%s' '%s' and '%s' if this CVM is unsuccessful\n",
614 tlv->value[i], tlv->value[i+1],
615 method, condition, (tlv->value[i] & 0x40) ? "continue" : "fail");
616 }
617 }
618
619 static void emv_tag_dump_afl(const struct tlv *tlv, const struct emv_tag *tag, FILE *f, int level){
620 if (tlv->len < 4 || tlv->len % 4) {
621 PRINT_INDENT(level);
622 fprintf(f, "\tINVALID!\n");
623 return;
624 }
625
626 for (int i = 0; i < tlv->len / 4; i++) {
627 PRINT_INDENT(level);
628 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]);
629 }
630 }
631
632 bool emv_tag_dump(const struct tlv *tlv, FILE *f, int level)
633 {
634 if (!tlv) {
635 fprintf(f, "NULL\n");
636 return false;
637 }
638
639 const struct emv_tag *tag = emv_get_tag(tlv);
640
641 PRINT_INDENT(level);
642 fprintf(f, "--%2hx[%02zx] '%s':", tlv->tag, tlv->len, tag->name);
643
644 switch (tag->type) {
645 case EMV_TAG_GENERIC:
646 fprintf(f, "\n");
647 break;
648 case EMV_TAG_BITMASK:
649 fprintf(f, "\n");
650 emv_tag_dump_bitmask(tlv, tag, f, level);
651 break;
652 case EMV_TAG_DOL:
653 fprintf(f, "\n");
654 emv_tag_dump_dol(tlv, tag, f, level);
655 break;
656 case EMV_TAG_CVM_LIST:
657 fprintf(f, "\n");
658 emv_tag_dump_cvm_list(tlv, tag, f, level);
659 break;
660 case EMV_TAG_AFL:
661 fprintf(f, "\n");
662 emv_tag_dump_afl(tlv, tag, f, level);
663 break;
664 case EMV_TAG_STRING:
665 emv_tag_dump_string(tlv, tag, f, level);
666 break;
667 case EMV_TAG_NUMERIC:
668 emv_tag_dump_numeric(tlv, tag, f, level);
669 break;
670 case EMV_TAG_YYMMDD:
671 emv_tag_dump_yymmdd(tlv, tag, f, level);
672 break;
673 case EMV_TAG_CVR:
674 fprintf(f, "\n");
675 emv_tag_dump_cvr(tlv, tag, f, level);
676 break;
677 case EMV_TAG_CID:
678 fprintf(f, "\n");
679 emv_tag_dump_cid(tlv, tag, f, level);
680 break;
681 };
682
683 return true;
684 }
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