-
-
Notifications
You must be signed in to change notification settings - Fork 981
/
cmdhfemrtd.c
2337 lines (1974 loc) · 90.1 KB
/
cmdhfemrtd.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//-----------------------------------------------------------------------------
// Copyright (C) Proxmark3 contributors. See AUTHORS.md for details.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// See LICENSE.txt for the text of the license.
//-----------------------------------------------------------------------------
// High frequency Electronic Machine Readable Travel Document commands
//-----------------------------------------------------------------------------
// This code is heavily based on mrpkey.py of RFIDIOt
#include "cmdhfemrtd.h"
#include <ctype.h>
#include "fileutils.h" // saveFile
#include "cmdparser.h" // command_t
#include "cmdtrace.h" // CmdTraceList
#include "cliparser.h" // CLIParserContext etc
#include "protocols.h" // definitions of ISO14A/7816 protocol
#include "iso7816/apduinfo.h" // GetAPDUCodeDescription
#include "iso7816/iso7816core.h" // Iso7816ExchangeEx etc
#include "crypto/libpcrypto.h" // Hash calculation (sha1, sha256, sha512), des_encrypt/des_decrypt
#include "des.h" // mbedtls_des_key_set_parity
#include "crapto1/crapto1.h" // prng_successor
#include "commonutil.h" // num_to_bytes
#include "util_posix.h" // msclock
#include "ui.h" // searchhomedirectory
#include "proxgui.h" // Picture Window
// Max file size in bytes. Used in several places.
// Average EF_DG2 seems to be around 20-25kB or so, but ICAO doesn't set an upper limit
// Iris data seems to be suggested to be around 35kB per eye (Presumably bumping up the file size to around 70kB)
// but as we cannot read that until we implement PACE, 35k seems to be a safe point.
#define EMRTD_MAX_FILE_SIZE 35000
// ISO7816 commands
#define EMRTD_P1_SELECT_BY_EF 0x02
#define EMRTD_P1_SELECT_BY_NAME 0x04
#define EMRTD_P2_PROPRIETARY 0x0C
// App IDs
#define EMRTD_AID_MRTD {0xA0, 0x00, 0x00, 0x02, 0x47, 0x10, 0x01}
#define EMRTD_KMAC_LEN 16
// DESKey Types
static const uint8_t KENC_type[4] = {0x00, 0x00, 0x00, 0x01};
static const uint8_t KMAC_type[4] = {0x00, 0x00, 0x00, 0x02};
static int emrtd_dump_ef_dg2(uint8_t *file_contents, size_t file_length, const char *path);
static int emrtd_dump_ef_dg5(uint8_t *file_contents, size_t file_length, const char *path);
static int emrtd_dump_ef_dg7(uint8_t *file_contents, size_t file_length, const char *path);
static int emrtd_dump_ef_sod(uint8_t *file_contents, size_t file_length, const char *path);
static int emrtd_print_ef_com_info(uint8_t *data, size_t datalen);
static int emrtd_print_ef_dg1_info(uint8_t *data, size_t datalen);
static int emrtd_print_ef_dg2_info(uint8_t *data, size_t datalen);
static int emrtd_print_ef_dg5_info(uint8_t *data, size_t datalen);
static int emrtd_print_ef_dg11_info(uint8_t *data, size_t datalen);
static int emrtd_print_ef_dg12_info(uint8_t *data, size_t datalen);
static int emrtd_print_ef_cardaccess_info(uint8_t *data, size_t datalen);
typedef enum { // list must match dg_table
EF_COM = 0,
EF_DG1,
EF_DG2,
EF_DG3,
EF_DG4,
EF_DG5,
EF_DG6,
EF_DG7,
EF_DG8,
EF_DG9,
EF_DG10,
EF_DG11,
EF_DG12,
EF_DG13,
EF_DG14,
EF_DG15,
EF_DG16,
EF_SOD,
EF_CardAccess,
EF_CardSecurity,
} emrtd_dg_enum;
static emrtd_dg_t dg_table[] = {
// tag dg# fileid filename desc pace eac req fast parser dumper
{0x60, 0, 0x011E, "EF_COM", "Header and Data Group Presence Information", false, false, true, true, emrtd_print_ef_com_info, NULL},
{0x61, 1, 0x0101, "EF_DG1", "Details recorded in MRZ", false, false, true, true, emrtd_print_ef_dg1_info, NULL},
{0x75, 2, 0x0102, "EF_DG2", "Encoded Face", false, false, true, false, emrtd_print_ef_dg2_info, emrtd_dump_ef_dg2},
{0x63, 3, 0x0103, "EF_DG3", "Encoded Finger(s)", false, true, false, false, NULL, NULL},
{0x76, 4, 0x0104, "EF_DG4", "Encoded Eye(s)", false, true, false, false, NULL, NULL},
{0x65, 5, 0x0105, "EF_DG5", "Displayed Portrait", false, false, false, false, emrtd_print_ef_dg5_info, emrtd_dump_ef_dg5},
{0x66, 6, 0x0106, "EF_DG6", "Reserved for Future Use", false, false, false, false, NULL, NULL},
{0x67, 7, 0x0107, "EF_DG7", "Displayed Signature or Usual Mark", false, false, false, false, NULL, emrtd_dump_ef_dg7},
{0x68, 8, 0x0108, "EF_DG8", "Data Feature(s)", false, false, false, true, NULL, NULL},
{0x69, 9, 0x0109, "EF_DG9", "Structure Feature(s)", false, false, false, true, NULL, NULL},
{0x6a, 10, 0x010A, "EF_DG10", "Substance Feature(s)", false, false, false, true, NULL, NULL},
{0x6b, 11, 0x010B, "EF_DG11", "Additional Personal Detail(s)", false, false, false, true, emrtd_print_ef_dg11_info, NULL},
{0x6c, 12, 0x010C, "EF_DG12", "Additional Document Detail(s)", false, false, false, true, emrtd_print_ef_dg12_info, NULL},
{0x6d, 13, 0x010D, "EF_DG13", "Optional Detail(s)", false, false, false, true, NULL, NULL},
{0x6e, 14, 0x010E, "EF_DG14", "Security Options", false, false, false, true, NULL, NULL},
{0x6f, 15, 0x010F, "EF_DG15", "Active Authentication Public Key Info", false, false, false, true, NULL, NULL},
{0x70, 16, 0x0110, "EF_DG16", "Person(s) to Notify", false, false, false, true, NULL, NULL},
{0x77, 0, 0x011D, "EF_SOD", "Document Security Object", false, false, false, false, NULL, emrtd_dump_ef_sod},
{0xff, 0, 0x011C, "EF_CardAccess", "PACE SecurityInfos", true, false, true, true, emrtd_print_ef_cardaccess_info, NULL},
{0xff, 0, 0x011D, "EF_CardSecurity", "PACE SecurityInfos for Chip Authentication Mapping", true, false, false, true, NULL, NULL},
{0x00, 0, 0, NULL, NULL, false, false, false, false, NULL, NULL}
};
// https://security.stackexchange.com/questions/131241/where-do-magic-constants-for-signature-algorithms-come-from
// https://tools.ietf.org/html/rfc3447#page-43
static emrtd_hashalg_t hashalg_table[] = {
// name hash func len len descriptor
{"SHA-1", sha1hash, 20, 7, {0x06, 0x05, 0x2B, 0x0E, 0x03, 0x02, 0x1A}},
{"SHA-256", sha256hash, 32, 11, {0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x01}},
{"SHA-512", sha512hash, 64, 11, {0x06, 0x09, 0x60, 0x86, 0x48, 0x01, 0x65, 0x03, 0x04, 0x02, 0x03}},
{NULL, NULL, 0, 0, {0}}
};
static emrtd_pacealg_t pacealg_table[] = {
// name keygen descriptor
{"DH, Generic Mapping, 3DES-CBC-CBC", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x01, 0x01}},
{"DH, Generic Mapping, AES-CMAC-128", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x01, 0x02}},
{"DH, Generic Mapping, AES-CMAC-192", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x01, 0x03}},
{"DH, Generic Mapping, AES-CMAC-256", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x01, 0x04}},
{"ECDH, Generic Mapping, 3DES-CBC-CBC", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x02, 0x01}},
{"ECDH, Generic Mapping, AES-CMAC-128", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x02, 0x02}},
{"ECDH, Generic Mapping, AES-CMAC-192", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x02, 0x03}},
{"ECDH, Generic Mapping, AES-CMAC-256", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x02, 0x04}},
{"DH, Integrated Mapping, 3DES-CBC-CBC", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x03, 0x01}},
{"DH, Integrated Mapping, AES-CMAC-128", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x03, 0x02}},
{"DH, Integrated Mapping, AES-CMAC-192", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x03, 0x03}},
{"DH, Integrated Mapping, AES-CMAC-256", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x03, 0x04}},
{"ECDH, Integrated Mapping, 3DES-CBC-CBC", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x04, 0x01}},
{"ECDH, Integrated Mapping, AES-CMAC-128", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x04, 0x02}},
{"ECDH, Integrated Mapping, AES-CMAC-192", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x04, 0x03}},
{"ECDH, Integrated Mapping, AES-CMAC-256", NULL, {0x04, 0x00, 0x7F, 0x00, 0x07, 0x02, 0x02, 0x04, 0x04, 0x04}},
{NULL, NULL, {0}}
};
static emrtd_pacesdp_t pacesdp_table[] = {
// id name size
{0, "1024-bit MODP Group with 160-bit Prime Order Subgroup", 1024},
{1, "2048-bit MODP Group with 224-bit Prime Order Subgroup", 2048},
{2, "2048-bit MODP Group with 256-bit Prime Order Subgroup", 2048},
{8, "NIST P-192 (secp192r1)", 192},
{10, "NIST P-224 (secp224r1)", 224},
{12, "NIST P-256 (secp256r1)", 256},
{15, "NIST P-384 (secp384r1)", 384},
{18, "NIST P-521 (secp521r1)", 521},
{9, "BrainpoolP192r1", 192},
{11, "BrainpoolP224r1", 224},
{13, "BrainpoolP256r1", 256},
{14, "BrainpoolP320r1", 320},
{16, "BrainpoolP384r1", 384},
{17, "BrainpoolP521r1", 521},
{32, NULL, 0}
};
static emrtd_dg_t *emrtd_tag_to_dg(uint8_t tag) {
for (int dgi = 0; dg_table[dgi].filename != NULL; dgi++) {
if (dg_table[dgi].tag == tag) {
return &dg_table[dgi];
}
}
return NULL;
}
static emrtd_dg_t *emrtd_fileid_to_dg(uint16_t file_id) {
for (int dgi = 0; dg_table[dgi].filename != NULL; dgi++) {
if (dg_table[dgi].fileid == file_id) {
return &dg_table[dgi];
}
}
return NULL;
}
static int CmdHelp(const char *Cmd);
static bool emrtd_exchange_commands(sAPDU_t apdu, bool include_le, uint16_t le, uint8_t *dataout, size_t maxdataoutlen, size_t *dataoutlen, bool activate_field, bool keep_field_on) {
uint16_t sw;
int res = Iso7816ExchangeEx(CC_CONTACTLESS, activate_field, keep_field_on, apdu, include_le, le, dataout, maxdataoutlen, dataoutlen, &sw);
if (res != PM3_SUCCESS) {
return false;
}
if (sw != ISO7816_OK) {
PrintAndLogEx(DEBUG, "Command failed (%04x - %s).", sw, GetAPDUCodeDescription(sw >> 8, sw & 0xff));
return false;
}
return true;
}
static int emrtd_exchange_commands_noout(sAPDU_t apdu, bool activate_field, bool keep_field_on) {
uint8_t response[PM3_CMD_DATA_SIZE] = {0};
size_t resplen = 0;
return emrtd_exchange_commands(apdu, false, 0, response, 0, &resplen, activate_field, keep_field_on);
}
static char emrtd_calculate_check_digit(char *data) {
const int mrz_weight[] = {7, 3, 1};
int value, cd = 0;
for (int i = 0; i < strlen(data); i++) {
char d = data[i];
if ('A' <= d && d <= 'Z') {
value = d - 55;
} else if ('a' <= d && d <= 'z') {
value = d - 87;
} else if (d == '<') {
value = 0;
} else { // Numbers
value = d - 48;
}
cd += value * mrz_weight[i % 3];
}
return cd % 10;
}
static int emrtd_get_asn1_data_length(uint8_t *datain, int datainlen, int offset) {
PrintAndLogEx(DEBUG, "asn1 datalength, datain: %s", sprint_hex_inrow(datain, datainlen));
int lenfield = (int) * (datain + offset);
PrintAndLogEx(DEBUG, "asn1 datalength, lenfield: %02X", lenfield);
if (lenfield <= 0x7f) {
return lenfield;
} else if (lenfield == 0x80) {
// TODO: 0x80 means indeterminate, and this impl is a workaround.
// Giving rest of the file is a workaround, nothing more, nothing less.
// https://wf.lavatech.top/ave-but-random/emrtd-data-quirks#EF_SOD
return datainlen;
} else if (lenfield == 0x81) {
int tmp = (*(datain + offset + 1));
return tmp;
//return ((int) * (datain + offset + 1));
} else if (lenfield == 0x82) {
int tmp = (*(datain + offset + 1) << 8);
tmp |= *(datain + offset + 2);
return tmp;
//return ((int) * (datain + offset + 1) << 8) | ((int) * (datain + offset + 2));
} else if (lenfield == 0x83) {
int tmp = (*(datain + offset + 1) << 16);
tmp |= (*(datain + offset + 2) << 8);
tmp |= *(datain + offset + 3);
return tmp;
//return (((int) * (datain + offset + 1) << 16) | ((int) * (datain + offset + 2)) << 8) | ((int) * (datain + offset + 3));
}
return 0;
}
static int emrtd_get_asn1_field_length(uint8_t *datain, int datainlen, int offset) {
PrintAndLogEx(DEBUG, "asn1 fieldlength, datain: %s", sprint_hex_inrow(datain, datainlen));
int lenfield = (int) * (datain + offset);
PrintAndLogEx(DEBUG, "asn1 fieldlength, lenfield: %02X", lenfield);
if (lenfield <= 0x80) {
return 1;
} else if (lenfield == 0x81) {
return 2;
} else if (lenfield == 0x82) {
return 3;
} else if (lenfield == 0x83) {
return 4;
}
return 0;
}
static void des3_encrypt_cbc(uint8_t *iv, uint8_t *key, uint8_t *input, int inputlen, uint8_t *output) {
mbedtls_des3_context ctx;
mbedtls_des3_set2key_enc(&ctx, key);
mbedtls_des3_crypt_cbc(&ctx // des3_context
, MBEDTLS_DES_ENCRYPT // int mode
, inputlen // length
, iv // iv[8]
, input // input
, output // output
);
mbedtls_des3_free(&ctx);
}
static void des3_decrypt_cbc(uint8_t *iv, uint8_t *key, uint8_t *input, int inputlen, uint8_t *output) {
mbedtls_des3_context ctx;
mbedtls_des3_set2key_dec(&ctx, key);
mbedtls_des3_crypt_cbc(&ctx // des3_context
, MBEDTLS_DES_DECRYPT // int mode
, inputlen // length
, iv // iv[8]
, input // input
, output // output
);
mbedtls_des3_free(&ctx);
}
static int pad_block(uint8_t *input, int inputlen, uint8_t *output) {
const uint8_t padding[8] = {0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
memcpy(output, input, inputlen);
int to_pad = (8 - (inputlen % 8));
for (int i = 0; i < to_pad; i++) {
output[inputlen + i] = padding[i];
}
return inputlen + to_pad;
}
static void retail_mac(uint8_t *key, uint8_t *input, int inputlen, uint8_t *output) {
// This code assumes blocklength (n) = 8, and input len of up to 240 or so chars
// This code takes inspirations from https://github.com/devinvenable/iso9797algorithm3
uint8_t k0[8];
uint8_t k1[8];
uint8_t intermediate[8] = {0x00};
uint8_t intermediate_des[256];
uint8_t block[8];
uint8_t message[256];
// Populate keys
memcpy(k0, key, 8);
memcpy(k1, key + 8, 8);
// Prepare message
int blocksize = pad_block(input, inputlen, message);
// Do chaining and encryption
for (int i = 0; i < (blocksize / 8); i++) {
memcpy(block, message + (i * 8), 8);
// XOR
for (int x = 0; x < 8; x++) {
intermediate[x] = intermediate[x] ^ block[x];
}
des_encrypt(intermediate_des, intermediate, k0);
memcpy(intermediate, intermediate_des, 8);
}
des_decrypt(intermediate_des, intermediate, k1);
memcpy(intermediate, intermediate_des, 8);
des_encrypt(intermediate_des, intermediate, k0);
memcpy(output, intermediate_des, 8);
}
static void emrtd_deskey(uint8_t *seed, const uint8_t *type, int length, uint8_t *dataout) {
PrintAndLogEx(DEBUG, "seed.............. %s", sprint_hex_inrow(seed, 16));
// combine seed and type
uint8_t data[50];
memcpy(data, seed, length);
memcpy(data + length, type, 4);
PrintAndLogEx(DEBUG, "data.............. %s", sprint_hex_inrow(data, length + 4));
// SHA1 the key
unsigned char key[64];
sha1hash(data, length + 4, key);
PrintAndLogEx(DEBUG, "key............... %s", sprint_hex_inrow(key, length + 4));
// Set parity bits
for (int i = 0; i < ((length + 4) / 8); i++) {
mbedtls_des_key_set_parity(key + (i * 8));
}
PrintAndLogEx(DEBUG, "post-parity key... %s", sprint_hex_inrow(key, 20));
memcpy(dataout, &key, length);
}
static void _emrtd_convert_fileid(uint16_t file, uint8_t *dataout) {
dataout[0] = file >> 8;
dataout[1] = file & 0xFF;
}
static int emrtd_select_file_by_name(uint8_t namelen, uint8_t *name) {
return emrtd_exchange_commands_noout((sAPDU_t) {0, ISO7816_SELECT_FILE, EMRTD_P1_SELECT_BY_NAME, 0x0C, namelen, name}, false, true);
}
static int emrtd_select_file_by_ef(uint16_t file_id) {
uint8_t data[2];
_emrtd_convert_fileid(file_id, data);
return emrtd_exchange_commands_noout((sAPDU_t) {0, ISO7816_SELECT_FILE, EMRTD_P1_SELECT_BY_EF, 0x0C, sizeof(data), data}, false, true);
}
static int emrtd_get_challenge(int length, uint8_t *dataout, size_t maxdataoutlen, size_t *dataoutlen) {
return emrtd_exchange_commands((sAPDU_t) {0, ISO7816_GET_CHALLENGE, 0, 0, 0, NULL}, true, length, dataout, maxdataoutlen, dataoutlen, false, true);
}
static int emrtd_external_authenticate(uint8_t *data, int length, uint8_t *dataout, size_t maxdataoutlen, size_t *dataoutlen) {
return emrtd_exchange_commands((sAPDU_t) {0, ISO7816_EXTERNAL_AUTHENTICATION, 0, 0, length, data}, true, length, dataout, maxdataoutlen, dataoutlen, false, true);
}
static int _emrtd_read_binary(int offset, int bytes_to_read, uint8_t *dataout, size_t maxdataoutlen, size_t *dataoutlen) {
return emrtd_exchange_commands((sAPDU_t) {0, ISO7816_READ_BINARY, offset >> 8, offset & 0xFF, 0, NULL}, true, bytes_to_read, dataout, maxdataoutlen, dataoutlen, false, true);
}
static void emrtd_bump_ssc(uint8_t *ssc) {
PrintAndLogEx(DEBUG, "ssc-b: %s", sprint_hex_inrow(ssc, 8));
for (int i = 7; i > 0; i--) {
if ((*(ssc + i)) == 0xFF) {
// Set anything already FF to 0, we'll do + 1 on num to left anyways
(*(ssc + i)) = 0;
} else {
(*(ssc + i)) += 1;
PrintAndLogEx(DEBUG, "ssc-a: %s", sprint_hex_inrow(ssc, 8));
return;
}
}
}
static bool emrtd_check_cc(uint8_t *ssc, uint8_t *key, uint8_t *rapdu, int rapdulength) {
// https://elixi.re/i/clarkson.png
uint8_t k[500] = { 0x00 };
uint8_t cc[500] = { 0x00 };
emrtd_bump_ssc(ssc);
memcpy(k, ssc, 8);
int length = 0;
int length2 = 0;
if (*(rapdu) == 0x87) {
length += 2 + (*(rapdu + 1));
memcpy(k + 8, rapdu, length);
PrintAndLogEx(DEBUG, "len1: %i", length);
}
if ((*(rapdu + length)) == 0x99) {
length2 += 2 + (*(rapdu + (length + 1)));
memcpy(k + length + 8, rapdu + length, length2);
PrintAndLogEx(DEBUG, "len2: %i", length2);
}
int klength = length + length2 + 8;
retail_mac(key, k, klength, cc);
PrintAndLogEx(DEBUG, "cc: %s", sprint_hex_inrow(cc, 8));
PrintAndLogEx(DEBUG, "rapdu: %s", sprint_hex_inrow(rapdu, rapdulength));
PrintAndLogEx(DEBUG, "rapdu cut: %s", sprint_hex_inrow(rapdu + (rapdulength - 8), 8));
PrintAndLogEx(DEBUG, "k: %s", sprint_hex_inrow(k, klength));
return memcmp(cc, rapdu + (rapdulength - 8), 8) == 0;
}
static bool emrtd_secure_select_file_by_ef(uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, uint16_t file) {
uint8_t response[PM3_CMD_DATA_SIZE] = { 0x00 };
size_t resplen = 0;
// convert fileid to bytes
uint8_t file_id[2] = { 0x00 };
_emrtd_convert_fileid(file, file_id);
uint8_t iv[8] = { 0x00 };
uint8_t cmd[8] = { 0x00 };
uint8_t data[21] = { 0x00 };
uint8_t temp[8] = {0x0c, 0xa4, EMRTD_P1_SELECT_BY_EF, 0x0c};
int cmdlen = pad_block(temp, 4, cmd);
int datalen = pad_block(file_id, 2, data);
PrintAndLogEx(DEBUG, "cmd: %s", sprint_hex_inrow(cmd, cmdlen));
PrintAndLogEx(DEBUG, "data: %s", sprint_hex_inrow(data, datalen));
des3_encrypt_cbc(iv, kenc, data, datalen, temp);
PrintAndLogEx(DEBUG, "temp: %s", sprint_hex_inrow(temp, datalen));
uint8_t do87[11] = {0x87, 0x09, 0x01};
memcpy(do87 + 3, temp, datalen);
PrintAndLogEx(DEBUG, "do87: %s", sprint_hex_inrow(do87, datalen + 3));
uint8_t m[19];
memcpy(m, cmd, cmdlen);
memcpy(m + cmdlen, do87, (datalen + 3));
PrintAndLogEx(DEBUG, "m: %s", sprint_hex_inrow(m, datalen + cmdlen + 3));
emrtd_bump_ssc(ssc);
uint8_t n[27];
memcpy(n, ssc, 8);
memcpy(n + 8, m, (cmdlen + datalen + 3));
PrintAndLogEx(DEBUG, "n: %s", sprint_hex_inrow(n, (cmdlen + datalen + 11)));
uint8_t cc[8];
retail_mac(kmac, n, (cmdlen + datalen + 11), cc);
PrintAndLogEx(DEBUG, "cc: %s", sprint_hex_inrow(cc, 8));
uint8_t do8e[10] = {0x8E, 0x08};
memcpy(do8e + 2, cc, 8);
PrintAndLogEx(DEBUG, "do8e: %s", sprint_hex_inrow(do8e, 10));
int lc = datalen + 3 + 10;
PrintAndLogEx(DEBUG, "lc: %i", lc);
memcpy(data, do87, datalen + 3);
memcpy(data + (datalen + 3), do8e, 10);
PrintAndLogEx(DEBUG, "data: %s", sprint_hex_inrow(data, lc));
if (emrtd_exchange_commands((sAPDU_t) {0x0C, ISO7816_SELECT_FILE, EMRTD_P1_SELECT_BY_EF, 0x0C, lc, data}, true, 0, response, sizeof(response), &resplen, false, true) == false) {
return false;
}
return emrtd_check_cc(ssc, kmac, response, resplen);
}
static bool _emrtd_secure_read_binary(uint8_t *kmac, uint8_t *ssc, int offset, int bytes_to_read, uint8_t *dataout, size_t maxdataoutlen, size_t *dataoutlen) {
uint8_t cmd[8] = { 0x00 };
uint8_t data[21] = { 0x00 };
uint8_t temp[8] = {0x0c, 0xb0};
PrintAndLogEx(DEBUG, "kmac: %s", sprint_hex_inrow(kmac, EMRTD_KMAC_LEN));
// Set p1 and p2
temp[2] = (uint8_t)(offset >> 8);
temp[3] = (uint8_t)(offset >> 0);
int cmdlen = pad_block(temp, 4, cmd);
PrintAndLogEx(DEBUG, "cmd: %s", sprint_hex_inrow(cmd, cmdlen));
uint8_t do97[3] = {0x97, 0x01, bytes_to_read};
uint8_t m[11] = { 0x00 };
memcpy(m, cmd, 8);
memcpy(m + 8, do97, 3);
emrtd_bump_ssc(ssc);
uint8_t n[19] = { 0x00 };
memcpy(n, ssc, 8);
memcpy(n + 8, m, 11);
PrintAndLogEx(DEBUG, "n: %s", sprint_hex_inrow(n, sizeof(n)));
uint8_t cc[8] = { 0x00 };
retail_mac(kmac, n, 19, cc);
PrintAndLogEx(DEBUG, "cc: %s", sprint_hex_inrow(cc, sizeof(cc)));
uint8_t do8e[10] = {0x8E, 0x08};
memcpy(do8e + 2, cc, 8);
PrintAndLogEx(DEBUG, "do8e: %s", sprint_hex_inrow(do8e, sizeof(do8e)));
int lc = 13;
PrintAndLogEx(DEBUG, "lc: %i", lc);
memcpy(data, do97, 3);
memcpy(data + 3, do8e, 10);
PrintAndLogEx(DEBUG, "data: %s", sprint_hex_inrow(data, lc));
if (emrtd_exchange_commands((sAPDU_t) {0x0C, ISO7816_READ_BINARY, offset >> 8, offset & 0xFF, lc, data}, true, 0, dataout, maxdataoutlen, dataoutlen, false, true) == false) {
return false;
}
return emrtd_check_cc(ssc, kmac, dataout, *dataoutlen);
}
static bool _emrtd_secure_read_binary_decrypt(uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, int offset, int bytes_to_read, uint8_t *dataout, size_t *dataoutlen) {
uint8_t response[500] = { 0x00 };
uint8_t temp[500] = { 0x00 };
size_t resplen, cutat = 0;
uint8_t iv[8] = { 0x00 };
if (_emrtd_secure_read_binary(kmac, ssc, offset, bytes_to_read, response, sizeof(response), &resplen) == false) {
return false;
}
PrintAndLogEx(DEBUG, "secreadbindec, offset %i on read %i: encrypted: %s", offset, bytes_to_read, sprint_hex_inrow(response, resplen));
cutat = ((int) response[1]) - 1;
des3_decrypt_cbc(iv, kenc, response + 3, cutat, temp);
memcpy(dataout, temp, bytes_to_read);
PrintAndLogEx(DEBUG, "secreadbindec, offset %i on read %i: decrypted: %s", offset, bytes_to_read, sprint_hex_inrow(temp, cutat));
PrintAndLogEx(DEBUG, "secreadbindec, offset %i on read %i: decrypted and cut: %s", offset, bytes_to_read, sprint_hex_inrow(dataout, bytes_to_read));
*dataoutlen = bytes_to_read;
return true;
}
static int emrtd_read_file(uint8_t *dataout, size_t *dataoutlen, uint8_t *kenc, uint8_t *kmac, uint8_t *ssc, bool use_secure) {
uint8_t response[EMRTD_MAX_FILE_SIZE] = { 0x00 };
size_t resplen = 0;
uint8_t tempresponse[500] = { 0x00 };
size_t tempresplen = 0;
int toread = 4;
int offset = 0;
if (use_secure) {
if (_emrtd_secure_read_binary_decrypt(kenc, kmac, ssc, offset, toread, response, &resplen) == false) {
return false;
}
} else {
if (_emrtd_read_binary(offset, toread, response, sizeof(response), &resplen) == false) {
return false;
}
}
int datalen = emrtd_get_asn1_data_length(response, resplen, 1);
int readlen = datalen - (3 - emrtd_get_asn1_field_length(response, resplen, 1));
offset = 4;
uint8_t lnbreak = 32;
PrintAndLogEx(INFO, "." NOLF);
while (readlen > 0) {
toread = readlen;
if (readlen > 118) {
toread = 118;
}
if (use_secure) {
if (_emrtd_secure_read_binary_decrypt(kenc, kmac, ssc, offset, toread, tempresponse, &tempresplen) == false) {
PrintAndLogEx(NORMAL, "");
return false;
}
} else {
if (_emrtd_read_binary(offset, toread, tempresponse, sizeof(tempresponse), &tempresplen) == false) {
PrintAndLogEx(NORMAL, "");
return false;
}
}
memcpy(response + resplen, tempresponse, tempresplen);
offset += toread;
readlen -= toread;
resplen += tempresplen;
PrintAndLogEx(NORMAL, "." NOLF);
fflush(stdout);
lnbreak--;
if (lnbreak == 0) {
PrintAndLogEx(NORMAL, "");
PrintAndLogEx(INFO, "." NOLF);
lnbreak = 32;
}
}
PrintAndLogEx(NORMAL, "");
memcpy(dataout, &response, resplen);
*dataoutlen = resplen;
return true;
}
static int emrtd_lds_determine_tag_length(uint8_t tag) {
if ((tag == 0x5F) || (tag == 0x7F)) {
return 2;
}
return 1;
}
static bool emrtd_lds_get_data_by_tag(uint8_t *datain, size_t datainlen, uint8_t *dataout, size_t *dataoutlen, int tag1, int tag2, bool twobytetag, bool entertoptag, size_t skiptagcount) {
int offset = 0;
int skipcounter = 0;
if (entertoptag) {
offset += emrtd_lds_determine_tag_length(*datain);
offset += emrtd_get_asn1_field_length(datain, datainlen, offset);
}
while (offset < datainlen) {
PrintAndLogEx(DEBUG, "emrtd_lds_get_data_by_tag, offset: %i, data: %X", offset, *(datain + offset));
// Determine element ID length to set as offset on asn1datalength
int e_idlen = emrtd_lds_determine_tag_length(*(datain + offset));
// Get the length of the element
int e_datalen = emrtd_get_asn1_data_length(datain + offset, datainlen - offset, e_idlen);
// Get the length of the element's length
int e_fieldlen = emrtd_get_asn1_field_length(datain + offset, datainlen - offset, e_idlen);
PrintAndLogEx(DEBUG, "emrtd_lds_get_data_by_tag, e_idlen: %02X, e_datalen: %02X, e_fieldlen: %02X", e_idlen, e_datalen, e_fieldlen);
// If the element is what we're looking for, get the data and return true
if (*(datain + offset) == tag1 && (!twobytetag || *(datain + offset + 1) == tag2)) {
if (skipcounter < skiptagcount) {
skipcounter += 1;
} else if (datainlen > e_datalen) {
*dataoutlen = e_datalen;
memcpy(dataout, datain + offset + e_idlen + e_fieldlen, e_datalen);
return true;
} else {
PrintAndLogEx(ERR, "error (emrtd_lds_get_data_by_tag) e_datalen out-of-bounds");
return false;
}
}
offset += e_idlen + e_datalen + e_fieldlen;
}
// Return false if we can't find the relevant element
return false;
}
static bool emrtd_select_and_read(uint8_t *dataout, size_t *dataoutlen, uint16_t file, uint8_t *ks_enc, uint8_t *ks_mac, uint8_t *ssc, bool use_secure) {
if (use_secure) {
if (emrtd_secure_select_file_by_ef(ks_enc, ks_mac, ssc, file) == false) {
PrintAndLogEx(ERR, "Failed to secure select %04X", file);
return false;
}
} else {
if (emrtd_select_file_by_ef(file) == false) {
PrintAndLogEx(ERR, "Failed to select %04X", file);
return false;
}
}
if (emrtd_read_file(dataout, dataoutlen, ks_enc, ks_mac, ssc, use_secure) == false) {
PrintAndLogEx(ERR, "Failed to read %04X", file);
return false;
}
return true;
}
static const uint8_t jpeg_header[4] = { 0xFF, 0xD8, 0xFF, 0xE0 };
static const uint8_t jpeg2k_header[6] = { 0x00, 0x00, 0x00, 0x0C, 0x6A, 0x50 };
static int emrtd_dump_ef_dg2(uint8_t *file_contents, size_t file_length, const char *path) {
size_t offset;
int datalen = 0;
// This is a hacky impl that just looks for the image header. I'll improve it eventually.
// based on mrpkey.py
// Note: Doing file_length - 6 to account for the longest data we're checking.
// Checks first byte before the rest to reduce overhead
for (offset = 0; offset < file_length - 6; offset++) {
if ((file_contents[offset] == 0xFF && memcmp(jpeg_header, file_contents + offset, 4) == 0) ||
(file_contents[offset] == 0x00 && memcmp(jpeg2k_header, file_contents + offset, 6) == 0)) {
datalen = file_length - offset;
break;
}
}
// If we didn't get any data, return false.
if (datalen == 0) {
return PM3_ESOFT;
}
char *filepath = calloc(strlen(path) + 100, sizeof(char));
if (filepath == NULL)
return PM3_EMALLOC;
strcpy(filepath, path);
strncat(filepath, PATHSEP, 2);
strcat(filepath, dg_table[EF_DG2].filename);
saveFile(filepath, file_contents[offset] == 0xFF ? ".jpg" : ".jp2", file_contents + offset, datalen);
free(filepath);
return PM3_SUCCESS;
}
static int emrtd_dump_ef_dg5(uint8_t *file_contents, size_t file_length, const char *path) {
uint8_t data[EMRTD_MAX_FILE_SIZE] = { 0x00 };
size_t datalen = 0;
// If we can't find image in EF_DG5, return false.
if (emrtd_lds_get_data_by_tag(file_contents, file_length, data, &datalen, 0x5F, 0x40, true, true, 0) == false) {
return PM3_ESOFT;
}
if (datalen < EMRTD_MAX_FILE_SIZE) {
char *filepath = calloc(strlen(path) + 100, sizeof(char));
if (filepath == NULL) {
return PM3_EMALLOC;
}
strcpy(filepath, path);
strncat(filepath, PATHSEP, 2);
strcat(filepath, dg_table[EF_DG5].filename);
saveFile(filepath, data[0] == 0xFF ? ".jpg" : ".jp2", data, datalen);
free(filepath);
} else {
PrintAndLogEx(ERR, "error (emrtd_dump_ef_dg5) datalen out-of-bounds");
return PM3_ESOFT;
}
return PM3_SUCCESS;
}
static int emrtd_dump_ef_dg7(uint8_t *file_contents, size_t file_length, const char *path) {
uint8_t data[EMRTD_MAX_FILE_SIZE] = { 0x00 };
size_t datalen = 0;
// If we can't find image in EF_DG7, return false.
if (emrtd_lds_get_data_by_tag(file_contents, file_length, data, &datalen, 0x5F, 0x42, true, true, 0) == false) {
return PM3_ESOFT;
}
if (datalen < EMRTD_MAX_FILE_SIZE) {
char *filepath = calloc(strlen(path) + 100, sizeof(char));
if (filepath == NULL) {
return PM3_EMALLOC;
}
strcpy(filepath, path);
strncat(filepath, PATHSEP, 2);
strcat(filepath, dg_table[EF_DG7].filename);
saveFile(filepath, data[0] == 0xFF ? ".jpg" : ".jp2", data, datalen);
free(filepath);
} else {
PrintAndLogEx(ERR, "error (emrtd_dump_ef_dg7) datalen out-of-bounds");
return PM3_ESOFT;
}
return PM3_SUCCESS;
}
static int emrtd_dump_ef_sod(uint8_t *file_contents, size_t file_length, const char *path) {
int fieldlen = emrtd_get_asn1_field_length(file_contents, file_length, 1);
int datalen = emrtd_get_asn1_data_length(file_contents, file_length, 1);
if (fieldlen + 1 > EMRTD_MAX_FILE_SIZE) {
PrintAndLogEx(ERR, "error (emrtd_dump_ef_sod) fieldlen out-of-bounds");
return PM3_EOUTOFBOUND;
}
char *filepath = calloc(strlen(path) + 100, sizeof(char));
if (filepath == NULL) {
return PM3_EMALLOC;
}
strcpy(filepath, path);
strncat(filepath, PATHSEP, 2);
strcat(filepath, dg_table[EF_SOD].filename);
saveFile(filepath, ".p7b", file_contents + fieldlen + 1, datalen);
free(filepath);
return PM3_ESOFT;
}
static bool emrtd_dump_file(uint8_t *ks_enc, uint8_t *ks_mac, uint8_t *ssc, uint16_t file, const char *name, bool use_secure, const char *path) {
uint8_t response[EMRTD_MAX_FILE_SIZE] = { 0x00 };
size_t resplen = 0;
if (emrtd_select_and_read(response, &resplen, file, ks_enc, ks_mac, ssc, use_secure) == false) {
return false;
}
char *filepath = calloc(strlen(path) + 100, sizeof(char));
if (filepath == NULL) {
return false;
}
strcpy(filepath, path);
strncat(filepath, PATHSEP, 2);
strcat(filepath, name);
PrintAndLogEx(INFO, "Read " _YELLOW_("%s") " , len %zu", name, resplen);
PrintAndLogEx(DEBUG, "Contents (may be incomplete over 2k chars)");
PrintAndLogEx(DEBUG, "------------------------------------------");
PrintAndLogEx(DEBUG, "%s", sprint_hex_inrow(response, resplen));
PrintAndLogEx(DEBUG, "------------------------------------------");
saveFile(filepath, ".BIN", response, resplen);
emrtd_dg_t *dg = emrtd_fileid_to_dg(file);
if ((dg != NULL) && (dg->dumper != NULL)) {
dg->dumper(response, resplen, path);
}
free(filepath);
return true;
}
static void rng(int length, uint8_t *dataout) {
// Do very very secure prng operations
//for (int i = 0; i < (length / 4); i++) {
// num_to_bytes(prng_successor(msclock() + i, 32), 4, &dataout[i * 4]);
//}
memset(dataout, 0x00, length);
}
static bool emrtd_do_bac(char *documentnumber, char *dob, char *expiry, uint8_t *ssc, uint8_t *ks_enc, uint8_t *ks_mac) {
uint8_t response[EMRTD_MAX_FILE_SIZE] = { 0x00 };
size_t resplen = 0;
uint8_t rnd_ic[10] = { 0x00 }; // 8 + SW
uint8_t kenc[50] = { 0x00 };
uint8_t kmac[50] = { 0x00 };
uint8_t k_icc[16] = { 0x00 };
uint8_t S[32] = { 0x00 };
uint8_t rnd_ifd[8], k_ifd[16];
rng(8, rnd_ifd);
rng(16, k_ifd);
PrintAndLogEx(DEBUG, "doc............... " _GREEN_("%s"), documentnumber);
PrintAndLogEx(DEBUG, "dob............... " _GREEN_("%s"), dob);
PrintAndLogEx(DEBUG, "exp............... " _GREEN_("%s"), expiry);
char documentnumbercd = emrtd_calculate_check_digit(documentnumber);
char dobcd = emrtd_calculate_check_digit(dob);
char expirycd = emrtd_calculate_check_digit(expiry);
char kmrz[25];
snprintf(kmrz, sizeof(kmrz), "%s%i%s%i%s%i", documentnumber, documentnumbercd, dob, dobcd, expiry, expirycd);
PrintAndLogEx(DEBUG, "kmrz.............. " _GREEN_("%s"), kmrz);
uint8_t kseed[20] = { 0x00 };
sha1hash((unsigned char *)kmrz, strlen(kmrz), kseed);
PrintAndLogEx(DEBUG, "kseed (sha1)...... %s ", sprint_hex_inrow(kseed, 16));
emrtd_deskey(kseed, KENC_type, 16, kenc);
emrtd_deskey(kseed, KMAC_type, 16, kmac);
PrintAndLogEx(DEBUG, "kenc.............. %s", sprint_hex_inrow(kenc, 16));
PrintAndLogEx(DEBUG, "kmac.............. %s", sprint_hex_inrow(kmac, 16));
// Get Challenge
if (emrtd_get_challenge(8, rnd_ic, sizeof(rnd_ic), &resplen) == false) {
PrintAndLogEx(ERR, "Couldn't get challenge.");
return false;
}
PrintAndLogEx(DEBUG, "rnd_ic............ %s", sprint_hex_inrow(rnd_ic, 8));
memcpy(S, rnd_ifd, 8);
memcpy(S + 8, rnd_ic, 8);
memcpy(S + 16, k_ifd, 16);
PrintAndLogEx(DEBUG, "S................. %s", sprint_hex_inrow(S, 32));
uint8_t iv[8] = { 0x00 };
uint8_t e_ifd[32] = { 0x00 };
des3_encrypt_cbc(iv, kenc, S, sizeof(S), e_ifd);
PrintAndLogEx(DEBUG, "e_ifd............. %s", sprint_hex_inrow(e_ifd, 32));
uint8_t m_ifd[8] = { 0x00 };
retail_mac(kmac, e_ifd, 32, m_ifd);
PrintAndLogEx(DEBUG, "m_ifd............. %s", sprint_hex_inrow(m_ifd, 8));
uint8_t cmd_data[40];
memcpy(cmd_data, e_ifd, 32);
memcpy(cmd_data + 32, m_ifd, 8);
// Do external authentication
if (emrtd_external_authenticate(cmd_data, sizeof(cmd_data), response, sizeof(response), &resplen) == false) {
PrintAndLogEx(ERR, "Couldn't do external authentication. Did you supply the correct MRZ info?");
return false;
}
PrintAndLogEx(INFO, "External authentication with BAC successful.");
uint8_t dec_output[32] = { 0x00 };
des3_decrypt_cbc(iv, kenc, response, 32, dec_output);
PrintAndLogEx(DEBUG, "dec_output........ %s", sprint_hex_inrow(dec_output, 32));
if (memcmp(rnd_ifd, dec_output + 8, 8) != 0) {
PrintAndLogEx(ERR, "Challenge failed, rnd_ifd does not match.");
return false;
}
memcpy(k_icc, dec_output + 16, 16);
// Calculate session keys
for (int x = 0; x < 16; x++) {
kseed[x] = k_ifd[x] ^ k_icc[x];
}
PrintAndLogEx(DEBUG, "kseed............ %s", sprint_hex_inrow(kseed, 16));
emrtd_deskey(kseed, KENC_type, 16, ks_enc);
emrtd_deskey(kseed, KMAC_type, 16, ks_mac);
PrintAndLogEx(DEBUG, "ks_enc........ %s", sprint_hex_inrow(ks_enc, 16));
PrintAndLogEx(DEBUG, "ks_mac........ %s", sprint_hex_inrow(ks_mac, 16));
memcpy(ssc, rnd_ic + 4, 4);
memcpy(ssc + 4, rnd_ifd + 4, 4);
PrintAndLogEx(DEBUG, "ssc........... %s", sprint_hex_inrow(ssc, 8));
return true;
}
static bool emrtd_connect(void) {
int res = Iso7816Connect(CC_CONTACTLESS);
return res == PM3_SUCCESS;
}
static bool emrtd_do_auth(char *documentnumber, char *dob, char *expiry, bool BAC_available, bool *BAC, uint8_t *ssc, uint8_t *ks_enc, uint8_t *ks_mac) {
// Select MRTD applet
uint8_t aid[] = EMRTD_AID_MRTD;
if (emrtd_select_file_by_name(sizeof(aid), aid) == false) {
PrintAndLogEx(ERR, "Couldn't select the MRTD application.");
return false;
}
// Select EF_COM
if (emrtd_select_file_by_ef(dg_table[EF_COM].fileid) == false) {
*BAC = true;
PrintAndLogEx(INFO, "Authentication is enforced");
PrintAndLogEx(INFO, "Switching to external authentication...");
} else {
*BAC = false;
// Select EF_DG1
emrtd_select_file_by_ef(dg_table[EF_DG1].fileid);
size_t resplen = 0;
uint8_t response[EMRTD_MAX_FILE_SIZE] = { 0x00 };
if (emrtd_read_file(response, &resplen, NULL, NULL, NULL, false) == false) {
*BAC = true;
PrintAndLogEx(INFO, "Authentication is enforced");