-
Notifications
You must be signed in to change notification settings - Fork 12
/
isohybrid.c
1334 lines (1073 loc) · 36.2 KB
/
isohybrid.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
/*
* isohybrid.c: Post process an ISO 9660 image generated with mkisofs or
* genisoimage to allow - hybrid booting - as a CD-ROM or as a hard
* disk.
*
* This is based on the original Perl script written by H. Peter Anvin. The
* rewrite in C is to avoid dependency on Perl on a system under installation.
*
* Copyright (C) 2010 P J P <[email protected]>
*
* isohybrid is a free software; you can redistribute it and/or modify it
* under the terms of GNU General Public License as published by Free Software
* Foundation; either version 2 of the license, or (at your option) any later
* version.
*
* isohybrid 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.
*
* You should have received a copy of the GNU General Public License along
* with isohybrid; if not, see: <http://www.gnu.org/licenses>.
*
*/
#include <err.h>
#include <time.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <alloca.h>
#include <getopt.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <inttypes.h>
#include <uuid/uuid.h>
#include "isohybrid.h"
char *prog = NULL;
extern int opterr, optind;
uuid_t disk_uuid, part_uuid, iso_uuid;
uint8_t mode = 0;
enum { VERBOSE = 1 , EFI = 2 , MAC = 4 , MODE_GPT = 8 , MODE_MBR = 0x10 , LEGACY = 0x20, GRUB = 0x40 };
/* partition numbers (1 based) */
int part_data = 0;
int part_efi = 0;
int part_mac = 0;
/* user options */
uint16_t head = 64; /* 1 <= head <= 256 */
uint8_t sector = 32; /* 1 <= sector <= 63 */
uint8_t entry = 0; /* partition number: 1 <= entry <= 4 */
uint32_t offset = 0; /* partition offset: 0 <= offset <= 0xFFFFFFFF(4294967296) */
uint16_t type = 0x17; /* partition type: 0 <= type <= 255 */
uint32_t id = 0; /* MBR: 0 <= id <= 0xFFFFFFFF(4294967296) */
uint8_t hd0 = 0; /* 0 <= hd0 <= 2 */
uint8_t partok = 0; /* 0 <= partok <= 1 */
uint16_t ve[16];
uint32_t catoffset = 0;
uint32_t c = 0;
off_t iso_size = 0;
off_t iso_filesize = 0;
struct {
unsigned no_mbr:1; /* gpt: don't write protective mbr */
unsigned no_code:1; /* no mbr boot code */
unsigned no_chs:1; /* fill in 0xffffff instead of real chs values */
off_t size; /* total size MBR partition table should cover */
char *mbr_file; /* read mbr from file (432 bytes) */
} opt;
/* boot catalogue parameters */
uint32_t de_lba = 0;
uint16_t de_seg = 0, de_count = 0, de_mbz2 = 0;
uint8_t de_boot = 0, de_media = 0, de_sys = 0, de_mbz1 = 0;
uint32_t efi_lba = 0, mac_lba = 0;
uint32_t efi_count = 0, mac_count = 0;
uint8_t efi_boot = 0, efi_media = 0, efi_sys = 0;
int apm_parts = 3;
uint8_t afp_header[] = { 0x45, 0x52, 0x08, 0x00, 0x00, 0x00, 0x90, 0x90, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
uuid_t efi_system_partition = {0xC1, 0x2A, 0x73, 0x28, 0xF8, 0x1F, 0x11, 0xD2, 0xBA, 0x4B, 0x00, 0xA0, 0xC9, 0x3E, 0xC9, 0x3B};
uuid_t basic_partition = {0xEB,0xD0,0xA0,0xA2,0xB9,0xE5,0x44,0x33,0x87,0xC0,0x68,0xB6,0xB7,0x26,0x99,0xC7};
uuid_t hfs_partition = {0x48, 0x46, 0x53, 0x00, 0x00, 0x00, 0x11, 0xAA, 0xAA, 0x11, 0x00, 0x30, 0x65, 0x43, 0xEC, 0xAC};
uint32_t crc_tab[256] =
{
0, 0x77073096, 0xEE0E612C, 0x990951BA,
0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE,
0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC,
0x14015C4F, 0x63066CD9, 0xFA0F3D63, 0x8D080DF5,
0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B,
0x35B5A8FA, 0x42B2986C, 0xDBBBC9D6, 0xACBCF940,
0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116,
0x21B4F4B5, 0x56B3C423, 0xCFBA9599, 0xB8BDA50F,
0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D,
0x76DC4190, 0x01DB7106, 0x98D220BC, 0xEFD5102A,
0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818,
0x7F6A0DBB, 0x086D3D2D, 0x91646C97, 0xE6635C01,
0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457,
0x65B0D9C6, 0x12B7E950, 0x8BBEB8EA, 0xFCB9887C,
0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2,
0x4ADFA541, 0x3DD895D7, 0xA4D1C46D, 0xD3D6F4FB,
0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9,
0x5005713C, 0x270241AA, 0xBE0B1010, 0xC90C2086,
0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4,
0x59B33D17, 0x2EB40D81, 0xB7BD5C3B, 0xC0BA6CAD,
0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683,
0xE3630B12, 0x94643B84, 0x0D6D6A3E, 0x7A6A5AA8,
0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE,
0xF762575D, 0x806567CB, 0x196C3671, 0x6E6B06E7,
0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5,
0xD6D6A3E8, 0xA1D1937E, 0x38D8C2C4, 0x4FDFF252,
0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60,
0xDF60EFC3, 0xA867DF55, 0x316E8EEF, 0x4669BE79,
0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F,
0xC5BA3BBE, 0xB2BD0B28, 0x2BB45A92, 0x5CB36A04,
0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A,
0x9C0906A9, 0xEB0E363F, 0x72076785, 0x05005713,
0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21,
0x86D3D2D4, 0xF1D4E242, 0x68DDB3F8, 0x1FDA836E,
0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C,
0x8F659EFF, 0xF862AE69, 0x616BFFD3, 0x166CCF45,
0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB,
0xAED16A4A, 0xD9D65ADC, 0x40DF0B66, 0x37D83BF0,
0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6,
0xBAD03605, 0xCDD70693, 0x54DE5729, 0x23D967BF,
0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
};
struct iso_primary_descriptor {
uint8_t ignore [80];
uint32_t size;
uint8_t ignore2 [44];
uint16_t block_size;
};
struct gpt_header {
uint64_t signature;
uint32_t revision;
uint32_t headerSize;
uint32_t headerCRC;
uint32_t reserved;
uint64_t currentLBA;
uint64_t backupLBA;
uint64_t firstUsableLBA;
uint64_t lastUsableLBA;
uuid_t diskGUID;
uint64_t partitionEntriesLBA;
uint32_t numParts;
uint32_t sizeOfPartitionEntries;
uint32_t partitionEntriesCRC;
uint8_t reserved2[420];
};
struct gpt_part_header {
uuid_t partTypeGUID;
uuid_t partGUID;
uint64_t firstLBA;
uint64_t lastLBA;
uint64_t attributes;
uint16_t name[36];
};
#define APM_OFFSET 2048
struct apple_part_header {
uint16_t signature; /* expected to be MAC_PARTITION_MAGIC */
uint16_t res1;
uint32_t map_count; /* # blocks in partition map */
uint32_t start_block; /* absolute starting block # of partition */
uint32_t block_count; /* number of blocks in partition */
char name[32]; /* partition name */
char type[32]; /* string type description */
uint32_t data_start; /* rel block # of first data block */
uint32_t data_count; /* number of data blocks */
uint32_t status; /* partition status bits */
uint32_t boot_start;
uint32_t boot_count;
uint32_t boot_load;
uint32_t boot_load2;
uint32_t boot_entry;
uint32_t boot_entry2;
uint32_t boot_cksum;
char processor[16]; /* Contains 680x0, x=0,2,3,4; or empty */
uint32_t driver_sig;
char _padding[372];
};
void
usage(void)
{
printf("Usage: %s [OPTIONS] <boot.iso>\n", prog);
}
void
printh(void)
{
#define FMT "%-18s %s\n"
usage();
printf("\n");
printf("Options:\n");
printf(FMT, " -h <X>", "Number of default geometry heads");
printf(FMT, " -s <X>", "Number of default geometry sectors");
printf(FMT, " -e --entry", "Specify partition entry number (1-4)");
printf(FMT, " -o --offset", "Specify partition offset (in 512 byte units, default 0)");
printf(FMT, " -t --type", "Specify partition type (default 0x17)");
printf(FMT, " -i --id", "Specify MBR ID (default random)");
printf(FMT, " -u --uefi", "Build EFI bootable image");
printf(FMT, " -m --mac", "Add AFP table support");
printf(FMT, " --gpt", "Force GPT");
printf(FMT, " --mbr", "Force MBR");
printf(FMT, " --no-mbr", "Don't write protective MBR for GPT");
printf(FMT, " --no-code", "Don't include MBR boot code");
printf(FMT, " --no-chs", "Don't fill in CHS values, use 0xffffff instead");
printf(FMT, " --size", "Specify disk size to assume when writing MBR (in 512 byte units)");
printf(FMT, " --legacy", "Expect an El Torito boot record (default)");
printf(FMT, " --no-legacy", "Do not expect an El Torito boot record");
printf(FMT, " --mbr-file FILE", "Use MBR from FILE");
printf(FMT, " --grub", "GRUB mode");
printf("\n");
printf(FMT, " --forcehd0", "Assume we are loaded as disk ID 0");
printf(FMT, " --ctrlhd0", "Assume disk ID 0 if the Ctrl key is pressed");
printf(FMT, " --partok", "Allow booting from within a partition");
printf("\n");
printf(FMT, " -? --help", "Display this help");
printf(FMT, " -v --verbose", "Display verbose output");
printf(FMT, " -V --version", "Display version information");
printf("\n");
printf("Report bugs to <[email protected]>\n");
}
int
check_option(int argc, char *argv[])
{
char *err = NULL;
int n = 0, ind = 0;
const char optstr[] = ":h:s:e:o:t:i:fcp?vV";
struct option lopt[] = \
{
{ "entry", required_argument, NULL, 'e' },
{ "offset", required_argument, NULL, 'o' },
{ "size", required_argument, NULL, 1006 },
{ "type", required_argument, NULL, 't' },
{ "id", required_argument, NULL, 'i' },
{ "mbr-file", required_argument, NULL, 1009 },
{ "gpt", no_argument, NULL, 1001 },
{ "mbr", no_argument, NULL, 1002 },
{ "no-mbr", no_argument, NULL, 1003 },
{ "no-code", no_argument, NULL, 1004 },
{ "no-chs", no_argument, NULL, 1005 },
{ "legacy", no_argument, NULL, 1007 },
{ "no-legacy", no_argument, NULL, 1008 },
{ "mbr-file", required_argument, NULL, 1009 },
{ "grub", no_argument, NULL, 1010 },
{ "forcehd0", no_argument, NULL, 'f' },
{ "ctrlhd0", no_argument, NULL, 'c' },
{ "partok", no_argument, NULL, 'p'},
{ "uefi", no_argument, NULL, 'u'},
{ "mac", no_argument, NULL, 'm'},
{ "help", no_argument, NULL, '?' },
{ "verbose", no_argument, NULL, 'v' },
{ "version", no_argument, NULL, 'V' },
{ 0, 0, 0, 0 }
};
opterr = 0;
mode = LEGACY;
while ((n = getopt_long_only(argc, argv, optstr, lopt, &ind)) != -1)
{
switch (n)
{
case 'h':
head = strtoul(optarg, &err, 0);
if (head < 1 || head > 256)
errx(1, "invalid head: `%s', 1 <= head <= 256", optarg);
break;
case 's':
sector = strtoul(optarg, &err, 0);
if (sector < 1 || sector > 63)
errx(1, "invalid sector: `%s', 1 <= sector <= 63", optarg);
break;
case 'e':
entry = strtoul(optarg, &err, 0);
if (entry < 1 || entry > 4)
errx(1, "invalid entry: `%s', 1 <= entry <= 4", optarg);
break;
case 'o':
offset = strtoul(optarg, &err, 0);
if (*err)
errx(1, "invalid offset: `%s', 0 <= offset <= 0xFFFFFFFF", optarg);
break;
case 't':
type = strtoul(optarg, &err, 0);
if (*err || type > 255)
errx(1, "invalid type: `%s', 0 <= type <= 255", optarg);
break;
case 'i':
id = strtoul(optarg, &err, 0);
if (*err)
errx(1, "invalid id: `%s'", optarg);
break;
case 'f':
hd0 = 1;
break;
case 'c':
hd0 = 2;
break;
case 'p':
partok = 1;
break;
case 'u':
mode |= EFI;
break;
case 'm':
mode |= MAC;
break;
case 'v':
mode |= VERBOSE;
break;
case 1001:
mode |= MODE_GPT;
break;
case 1002:
mode |= MODE_MBR;
break;
case 1003:
opt.no_mbr = 1;
break;
case 1004:
opt.no_code = 1;
break;
case 1005:
opt.no_chs = 1;
break;
case 1006:
opt.size = strtoul(optarg, &err, 0);
if (*err)
errx(1, "invalid size: `%s'", optarg);
break;
case 1007:
mode |= LEGACY;
break;
case 1008:
mode &= ~LEGACY;
break;
case 1009:
opt.mbr_file = optarg;
break;
case 1010:
mode |= GRUB;
break;
case 'V':
printf("%s version %s\n", prog, VERSION);
exit(0);
case ':':
errx(1, "option `-%c' takes an argument", optopt);
default:
case '?':
if (optopt)
errx(1, "invalid option `-%c', see --help", optopt);
printh();
exit(0);
}
}
return optind;
}
uint16_t
bendian_short(const uint16_t s)
{
uint16_t r = 1;
if (!*(uint8_t *)&r)
return s;
r = (s & 0x00FF) << 8 | (s & 0xFF00) >> 8;
return r;
}
uint32_t
bendian_int(const uint32_t s)
{
uint32_t r = 1;
if (!*(uint8_t *)&r)
return s;
r = (s & 0x000000FF) << 24 | (s & 0xFF000000) >> 24
| (s & 0x0000FF00) << 8 | (s & 0x00FF0000) >> 8;
return r;
}
uint16_t
lendian_short(const uint16_t s)
{
uint16_t r = 1;
if (*(uint8_t *)&r)
return s;
r = (s & 0x00FF) << 8 | (s & 0xFF00) >> 8;
return r;
}
uint32_t
lendian_int(const uint32_t s)
{
uint32_t r = 1;
if (*(uint8_t *)&r)
return s;
r = (s & 0x000000FF) << 24 | (s & 0xFF000000) >> 24
| (s & 0x0000FF00) << 8 | (s & 0x00FF0000) >> 8;
return r;
}
uint64_t
lendian_64(const uint64_t s)
{
uint64_t r = 1;
if (*(uint8_t *)&r)
return s;
r = (s & 0x00000000000000FFull) << 56 | (s & 0xFF00000000000000ull) >> 56
| (s & 0x000000000000FF00ull) << 40 | (s & 0x00FF000000000000ull) >> 40
| (s & 0x0000000000FF0000ull) << 24 | (s & 0x0000FF0000000000ull) >> 24
| (s & 0x00000000FF000000ull) << 8 | (s & 0x000000FF00000000ull) >> 8;
return r;
}
int
check_banner(const uint8_t *buf)
{
static const char banner[] = "\0CD001\1EL TORITO SPECIFICATION\0\0\0\0" \
"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0" \
"\0\0\0\0\0";
if (!buf || memcmp(buf, banner, sizeof(banner) - 1))
return 1;
buf += sizeof(banner) - 1;
memcpy(&catoffset, buf, sizeof(catoffset));
catoffset = lendian_int(catoffset);
return 0;
}
int
check_catalogue(const uint8_t *buf)
{
int i, cs;
for (i = 0, cs = 0; i < 16; i++)
{
ve[i] = 0;
memcpy(&ve[i], buf, sizeof(ve[i]));
ve[i] = lendian_short(ve[i]);
buf += 2;
cs += ve[i];
if (mode & VERBOSE)
printf("ve[%d]: 0x%x, cs: 0x%x\n", i, ve[i], cs);
}
if (((ve[0] & 0xff) != 0x01) || (ve[15] != 0xAA55) || (cs & 0xFFFF))
return 1;
return 0;
}
int
read_catalogue(const uint8_t *buf)
{
memcpy(&de_boot, buf++, 1);
memcpy(&de_media, buf++, 1);
memcpy(&de_seg, buf, 2);
de_seg = lendian_short(de_seg);
buf += 2;
memcpy(&de_sys, buf++, 1);
memcpy(&de_mbz1, buf++, 1);
memcpy(&de_count, buf, 2);
de_count = lendian_short(de_count);
buf += 2;
memcpy(&de_lba, buf, 4);
de_lba = lendian_int(de_lba);
buf += 4;
memcpy(&de_mbz2, buf, 2);
de_mbz2 = lendian_short(de_mbz2);
buf += 2;
if (de_boot != 0x88 || de_media != 0
|| (de_seg != 0 && de_seg != 0x7C0))
return 1;
return 0;
}
int
read_efi_section(const uint8_t *buf)
{
unsigned char header_indicator;
unsigned char platform_id;
short count;
memcpy(&header_indicator, buf++, 1);
memcpy(&platform_id, buf++, 1);
memcpy(&count, buf, 2);
count = lendian_short(count);
buf += 2;
if (platform_id == 0xef)
return 0;
return 1;
}
int
read_efi_catalogue(const uint8_t *buf, uint32_t *count, uint32_t *lba)
{
buf += 6;
memcpy(count, buf, 2);
*count = lendian_short(*count);
buf += 2;
memcpy(lba, buf, 4);
*lba = lendian_int(*lba);
buf += 6;
return 0;
}
void
display_catalogue(void)
{
printf("de_boot: %hhu\n", de_boot);
printf("de_media: %hhu\n", de_media);
printf("de_seg: %hu\n", de_seg);
printf("de_sys: %hhu\n", de_sys);
printf("de_mbz1: %hhu\n", de_mbz1);
printf("de_count: %hu\n", de_count);
printf("de_lba: %u\n", de_lba);
printf("de_mbz2: %hu\n", de_mbz2);
}
uint32_t ofs2chs(uint32_t ofs)
{
unsigned c, h, s;
if(opt.no_chs) return 0xffffff00;
s = (ofs % sector) + 1;
h = (ofs / sector) % head;
c = ofs / (sector * head);
if(c > 1023) {
c = 1023;
s = sector;
h = head - 1;
}
return ((c & 0xff) << 24) + ((s + ((c >> 8) << 6)) << 16) + (h << 8);
}
int
initialise_mbr(uint8_t *mbr)
{
int i = 0;
uint64_t tmp64 = 0;
uint32_t tmp = 0, chs;
uint8_t *rbm = mbr;
if(opt.no_mbr) return 0x200;
extern unsigned char isohdpfx[][MBRSIZE];
if (catoffset && !opt.no_code) {
if(opt.mbr_file) {
int fd = open(opt.mbr_file, O_RDONLY);
if(fd == -1) {
perror(opt.mbr_file);
exit(1);
}
if(read(fd, mbr, MBRSIZE) != MBRSIZE) {
fprintf(stderr, "%s: failed to read MBR\n", opt.mbr_file);
exit(1);
}
close(fd);
}
else {
memcpy(mbr, &isohdpfx[hd0 + 3 * partok], MBRSIZE);
}
}
if (mode & MAC) {
memcpy(mbr, afp_header, sizeof(afp_header));
}
mbr += MBRSIZE; /* offset 432 */
tmp64 = lendian_64(((mode & GRUB) ? (uint64_t) de_lba + 1 : (uint64_t) de_lba) * 4);
if(!opt.no_code) memcpy(mbr, &tmp64, sizeof(tmp64));
mbr += sizeof(tmp64); /* offset 440 */
tmp = lendian_int(id);
memcpy(mbr, &tmp, sizeof(tmp));
mbr += sizeof(tmp); /* offset 444 */
mbr[0] = '\0';
mbr[1] = '\0';
mbr += 2; /* offset 446 */
for (i = 1; i <= 4; i++, mbr += 16)
{
memset(mbr, 0, 16);
if (!(mode & MODE_MBR)) {
/* write protective mbr */
if(i == 1 && (mode & MODE_GPT)) {
chs = ofs2chs(1);
mbr[1] = chs >> 8;
mbr[2] = chs >> 16;
mbr[3] = chs >> 24;
mbr[4] = 0xee;
chs = ofs2chs(iso_filesize/512 - 1);
mbr[5] = chs >> 8;
mbr[6] = chs >> 16;
mbr[7] = chs >> 24;
tmp = lendian_int(1);
memcpy(&mbr[8], &tmp, sizeof(tmp));
tmp = lendian_int(iso_filesize/512 - 1);
memcpy(&mbr[12], &tmp, sizeof(tmp));
}
continue;
}
if (i == part_data)
{
chs = ofs2chs(offset);
mbr[0] = 0x80;
mbr[1] = chs >> 8;
mbr[2] = chs >> 16;
mbr[3] = chs >> 24;
chs = ofs2chs((opt.size ?: c * head * sector) - 1);
mbr[4] = type;
mbr[5] = chs >> 8;
mbr[6] = chs >> 16;
mbr[7] = chs >> 24;
tmp = lendian_int(offset);
memcpy(&mbr[8], &tmp, sizeof(tmp));
tmp = lendian_int((opt.size ?: c * head * sector) - offset);
memcpy(&mbr[12], &tmp, sizeof(tmp));
}
if (i == part_efi)
{
chs = ofs2chs(efi_lba * 4);
mbr[1] = chs >> 8;
mbr[2] = chs >> 16;
mbr[3] = chs >> 24;
chs = ofs2chs(efi_lba * 4 + efi_count - 1);
mbr[4] = 0xef;
mbr[5] = chs >> 8;
mbr[6] = chs >> 16;
mbr[7] = chs >> 24;
tmp = lendian_int(efi_lba * 4);
memcpy(&mbr[8], &tmp, sizeof(tmp));
tmp = lendian_int(efi_count);
memcpy(&mbr[12], &tmp, sizeof(tmp));
}
if (i == part_mac)
{
mbr[1] = 0xfe;
mbr[2] = 0xff;
mbr[3] = 0xff;
mbr[4] = 0x0;
mbr[5] = 0xfe;
mbr[6] = 0xff;
mbr[7] = 0xff;
tmp = lendian_int(mac_lba * 4);
memcpy(&mbr[8], &tmp, sizeof(tmp));
tmp = lendian_int(mac_count);
memcpy(&mbr[12], &tmp, sizeof(tmp));
}
}
mbr[0] = 0x55;
mbr[1] = 0xAA;
mbr += 2;
return mbr - rbm;
}
void
display_mbr(const uint8_t *mbr, size_t len)
{
unsigned char c = 0;
unsigned int i = 0, j = 0;
printf("sizeof(MBR): %zu bytes\n", len);
for (i = 0; i < len; i++)
{
if (!(i % 16))
printf("%04d ", i);
if (!(i % 8))
printf(" ");
c = mbr[i];
printf("%02x ", c);
if (!((i + 1) % 16))
{
printf(" |");
for (; j <= i; j++)
printf("%c", isprint(mbr[j]) ? mbr[j] : '.');
printf("|\n");
}
}
}
uint32_t chksum_crc32 (unsigned char *block, unsigned int length)
{
register unsigned long crc;
unsigned long i;
crc = 0xFFFFFFFF;
for (i = 0; i < length; i++)
{
crc = ((crc >> 8) & 0x00FFFFFF) ^ crc_tab[(crc ^ *block++) & 0xFF];
}
return (crc ^ 0xFFFFFFFF);
}
void
reverse_uuid(uuid_t uuid)
{
uint8_t t, *p = (uint8_t *)uuid;
t = p[0]; p[0] = p[3]; p[3] = t;
t = p[1]; p[1] = p[2]; p[2] = t;
t = p[4]; p[4] = p[5]; p[5] = t;
t = p[6]; p[6] = p[7]; p[7] = t;
}
void
set_gpt_part_name(struct gpt_part_header *part, const char *name)
{
unsigned u, len = strlen(name);
if (len > sizeof part->name / sizeof *part->name)
len = sizeof part->name / sizeof *part->name;
// utf16le, actually
for (u = 0; u < len; u++)
part->name[u] = *name++;
}
void
initialise_gpt(uint8_t *gpt, uint32_t current, uint32_t alternate, int primary)
{
struct gpt_header *header = (struct gpt_header *)gpt;
struct gpt_part_header *part;
int hole = 0;
int gptsize = 128 / 4 + 2;
int i;
if(!(mode & MODE_GPT)) return;
if (mac_lba) {
/* 2048 bytes per partition, plus round to 2048 boundary */
hole = (apm_parts * 4) + 2;
}
if (primary) {
uuid_generate(disk_uuid);
reverse_uuid(disk_uuid);
}
header->signature = lendian_64(0x5452415020494645ull);
header->revision = lendian_int(0x010000);
header->headerSize = lendian_int(0x5c);
header->currentLBA = lendian_64(current);
header->backupLBA = lendian_64(alternate);
header->firstUsableLBA = lendian_64(gptsize + hole);
header->lastUsableLBA = lendian_64(iso_filesize/512 - gptsize);
if (primary)
header->partitionEntriesLBA = lendian_64(0x02 + hole);
else
header->partitionEntriesLBA = lendian_64(current - (128 / 4));
header->numParts = lendian_int(0x80);
header->sizeOfPartitionEntries = lendian_int(0x80);
memcpy(header->diskGUID, disk_uuid, sizeof(uuid_t));
if (primary)
gpt += sizeof(struct gpt_header) + hole * 512;
else
gpt -= header->sizeOfPartitionEntries * header->numParts;
part = (struct gpt_part_header *)gpt;
if (primary) {
uuid_generate(part_uuid);
uuid_generate(iso_uuid);
reverse_uuid(part_uuid);
reverse_uuid(iso_uuid);
}
for(i = 1; i <= 4; i++, part++) {
if(i == part_data) {
memcpy(part->partGUID, iso_uuid, sizeof(uuid_t));
memcpy(part->partTypeGUID, basic_partition, sizeof(uuid_t));
part->firstLBA = lendian_64(offset);
part->lastLBA = lendian_64(iso_size/512 - 1);
set_gpt_part_name(part, "ISOHybrid ISO");
}
if(i == part_efi) {
memcpy(part->partGUID, part_uuid, sizeof(uuid_t));
memcpy(part->partTypeGUID, efi_system_partition, sizeof(uuid_t));
part->firstLBA = lendian_64(efi_lba * 4);
part->lastLBA = lendian_64(part->firstLBA + efi_count - 1);
set_gpt_part_name(part, "ISOHybrid");
}
if (i == part_mac) {
memcpy(part->partGUID, part_uuid, sizeof(uuid_t));
memcpy(part->partTypeGUID, hfs_partition, sizeof(uuid_t));
part->firstLBA = lendian_64(mac_lba * 4);
part->lastLBA = lendian_64(part->firstLBA + mac_count - 1);
set_gpt_part_name(part, "ISOHybrid");
}
}
header->partitionEntriesCRC = lendian_int (chksum_crc32(gpt,
header->numParts * header->sizeOfPartitionEntries));
header->headerCRC = lendian_int(chksum_crc32((uint8_t *)header,
header->headerSize));
}
void
initialise_apm(uint8_t *gpt, uint32_t start)
{
struct apple_part_header *part = (struct apple_part_header *)gpt;
part->signature = bendian_short(0x504d);
part->map_count = bendian_int(apm_parts);
part->start_block = bendian_int(1);
part->block_count = bendian_int(0x10);
strcpy(part->name, "Apple");
strcpy(part->type, "Apple_partition_map");
part->data_start = bendian_int(0);
part->data_count = bendian_int(10);
part->status = bendian_int(0x03);
part = (struct apple_part_header *)(gpt + 2048);
part->signature = bendian_short(0x504d);
part->map_count = bendian_int(3);
part->start_block = bendian_int(efi_lba);
part->block_count = bendian_int(efi_count);
strcpy(part->name, "EFI");
strcpy(part->type, "Apple_HFS");
part->data_start = bendian_int(0);
part->data_count = bendian_int(efi_count);
part->status = bendian_int(0x33);
part = (struct apple_part_header *)(gpt + 4096);
if (mac_lba)
{
part->signature = bendian_short(0x504d);
part->map_count = bendian_int(3);
part->start_block = bendian_int(mac_lba);
part->block_count = bendian_int(mac_count);
strcpy(part->name, "EFI");
strcpy(part->type, "Apple_HFS");
part->data_start = bendian_int(0);
part->data_count = bendian_int(mac_count);
part->status = bendian_int(0x33);
} else {
part->signature = bendian_short(0x504d);
part->map_count = bendian_int(3);
part->start_block = bendian_int((start/2048) + 10);
part->block_count = bendian_int(efi_lba - start/2048 - 10);
strcpy(part->name, "ISO");
strcpy(part->type, "Apple_Free");
part->data_start = bendian_int(0);
part->data_count = bendian_int(efi_lba - start/2048 - 10);
part->status = bendian_int(0x01);