forked from ckolivas/lrzip
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathlrzip.c
1379 lines (1222 loc) · 40.6 KB
/
lrzip.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) 2006-2016,2018 Con Kolivas
Copyright (C) 2011 Peter Hyman
Copyright (C) 1998-2003 Andrew Tridgell
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 2 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#include <fcntl.h>
#include <sys/statvfs.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <arpa/inet.h>
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#include <sys/mman.h>
#include <sys/time.h>
#include <termios.h>
#ifdef HAVE_ENDIAN_H
# include <endian.h>
#elif HAVE_SYS_ENDIAN_H
# include <sys/endian.h>
#endif
#ifdef HAVE_ARPA_INET_H
# include <arpa/inet.h>
#endif
#include <math.h>
#include <utime.h>
#include <inttypes.h>
#include "md5.h"
#include "rzip.h"
#include "runzip.h"
#include "util.h"
#include "stream.h"
#define MAGIC_LEN (24)
static void release_hashes(rzip_control *control);
static i64 fdout_seekto(rzip_control *control, i64 pos)
{
if (TMP_OUTBUF) {
pos -= control->out_relofs;
control->out_ofs = pos;
if (unlikely(pos > control->out_len || pos < 0)) {
print_err("Trying to seek to %lld outside tmp outbuf in fdout_seekto\n", pos);
return -1;
}
return 0;
}
return lseek(control->fd_out, pos, SEEK_SET);
}
#ifdef __APPLE__
# include <sys/sysctl.h>
i64 get_ram(rzip_control *control)
{
int mib[2];
size_t len;
i64 *p, ramsize;
mib[0] = CTL_HW;
mib[1] = HW_MEMSIZE;
sysctl(mib, 2, NULL, &len, NULL, 0);
p = malloc(len);
sysctl(mib, 2, p, &len, NULL, 0);
ramsize = *p;
return ramsize;
}
#else /* __APPLE__ */
i64 get_ram(rzip_control *control)
{
i64 ramsize;
FILE *meminfo;
char aux[256];
ramsize = (i64)sysconf(_SC_PHYS_PAGES) * PAGE_SIZE;
if (ramsize > 0)
return ramsize;
/* Workaround for uclibc which doesn't properly support sysconf */
if(!(meminfo = fopen("/proc/meminfo", "r")))
fatal_return(("fopen\n"), -1);
while(!feof(meminfo) && !fscanf(meminfo, "MemTotal: %"PRId64" kB", &ramsize)) {
if (unlikely(fgets(aux, sizeof(aux), meminfo) == NULL)) {
fclose(meminfo);
fatal_return(("Failed to fgets in get_ram\n"), -1);
}
}
if (fclose(meminfo) == -1)
fatal_return(("fclose"), -1);
ramsize *= 1000;
return ramsize;
}
#endif
i64 nloops(i64 seconds, uchar *b1, uchar *b2)
{
i64 nloops;
int nbits;
nloops = ARBITRARY_AT_EPOCH * pow(MOORE_TIMES_PER_SECOND, seconds);
if (nloops < ARBITRARY)
nloops = ARBITRARY;
for (nbits = 0; nloops > 255; nbits ++)
nloops = nloops >> 1;
*b1 = nbits;
*b2 = nloops;
return nloops << nbits;
}
bool write_magic(rzip_control *control)
{
char magic[MAGIC_LEN] = {
'L', 'R', 'Z', 'I', LRZIP_MAJOR_VERSION, LRZIP_MINOR_VERSION
};
/* File size is stored as zero for streaming STDOUT blocks when the
* file size is unknown. In encrypted files, the size is left unknown
* and instead the salt is stored here to preserve space. */
if (ENCRYPT)
memcpy(&magic[6], &control->salt, 8);
else if (!STDIN || !STDOUT || control->eof) {
i64 esize = htole64(control->st_size);
memcpy(&magic[6], &esize, 8);
}
/* save LZMA compression flags */
if (LZMA_COMPRESS) {
int i;
for (i = 0; i < 5; i++)
magic[i + 16] = (char)control->lzma_properties[i];
}
/* This is a flag that the archive contains an md5 sum at the end
* which can be used as an integrity check instead of crc check.
* crc is still stored for compatibility with 0.5 versions.
*/
if (!NO_MD5)
magic[21] = 1;
if (ENCRYPT)
magic[22] = 1;
if (unlikely(fdout_seekto(control, 0)))
fatal_return(("Failed to seek to BOF to write Magic Header\n"), false);
if (unlikely(put_fdout(control, magic, MAGIC_LEN) != MAGIC_LEN))
fatal_return(("Failed to write magic header\n"), false);
control->magic_written = 1;
return true;
}
static inline i64 enc_loops(uchar b1, uchar b2)
{
return (i64)b2 << (i64)b1;
}
static bool get_magic(rzip_control *control, char *magic)
{
int encrypted, md5, i;
i64 expected_size;
uint32_t v;
if (unlikely(strncmp(magic, "LRZI", 4)))
failure_return(("Not an lrzip file\n"), false);
memcpy(&control->major_version, &magic[4], 1);
memcpy(&control->minor_version, &magic[5], 1);
print_verbose("Detected lrzip version %d.%d file.\n", control->major_version, control->minor_version);
if (control->major_version > LRZIP_MAJOR_VERSION ||
(control->major_version == LRZIP_MAJOR_VERSION && control->minor_version > LRZIP_MINOR_VERSION))
print_output("Attempting to work with file produced by newer lrzip version %d.%d file.\n", control->major_version, control->minor_version);
/* Support the convoluted way we described size in versions < 0.40 */
if (control->major_version == 0 && control->minor_version < 4) {
memcpy(&v, &magic[6], 4);
expected_size = ntohl(v);
memcpy(&v, &magic[10], 4);
expected_size |= ((i64)ntohl(v)) << 32;
} else {
memcpy(&expected_size, &magic[6], 8);
expected_size = le64toh(expected_size);
}
control->st_size = expected_size;
if (control->major_version == 0 && control->minor_version < 6)
control->eof = 1;
/* restore LZMA compression flags only if stored */
if ((int) magic[16]) {
for (i = 0; i < 5; i++)
control->lzma_properties[i] = magic[i + 16];
}
/* Whether this archive contains md5 data at the end or not */
md5 = magic[21];
if (md5 && MD5_RELIABLE) {
if (md5 == 1)
control->flags |= FLAG_MD5;
else
print_verbose("Unknown hash, falling back to CRC\n");
}
encrypted = magic[22];
if (encrypted) {
if (encrypted == 1)
control->flags |= FLAG_ENCRYPT;
else
failure_return(("Unknown encryption\n"), false);
/* In encrypted files, the size field is used to store the salt
* instead and the size is unknown, just like a STDOUT chunked
* file */
memcpy(&control->salt, &magic[6], 8);
control->st_size = expected_size = 0;
control->encloops = enc_loops(control->salt[0], control->salt[1]);
print_maxverbose("Encryption hash loops %lld\n", control->encloops);
} else if (ENCRYPT) {
print_output("Asked to decrypt a non-encrypted archive. Bypassing decryption.\n");
control->flags &= ~FLAG_ENCRYPT;
}
return true;
}
bool read_magic(rzip_control *control, int fd_in, i64 *expected_size)
{
char magic[MAGIC_LEN];
memset(magic, 0, sizeof(magic));
/* Initially read only <v0.6x header */
if (unlikely(read(fd_in, magic, 24) != 24))
fatal_return(("Failed to read magic header\n"), false);
if (unlikely(!get_magic(control, magic)))
return false;
*expected_size = control->st_size;
return true;
}
/* preserve ownership and permissions where possible */
static bool preserve_perms(rzip_control *control, int fd_in, int fd_out)
{
struct stat st;
if (unlikely(fstat(fd_in, &st)))
fatal_return(("Failed to fstat input file\n"), false);
if (unlikely(fchmod(fd_out, (st.st_mode & 0666))))
print_verbose("Warning, unable to set permissions on %s\n", control->outfile);
/* chown fail is not fatal_return(( */
if (unlikely(fchown(fd_out, st.st_uid, st.st_gid)))
print_verbose("Warning, unable to set owner on %s\n", control->outfile);
return true;
}
static bool preserve_times(rzip_control *control, int fd_in)
{
struct utimbuf times;
struct stat st;
if (unlikely(fstat(fd_in, &st)))
fatal_return(("Failed to fstat input file\n"), false);
times.actime = 0;
times.modtime = st.st_mtime;
if (unlikely(utime(control->outfile, ×)))
print_verbose("Warning, unable to set time on %s\n", control->outfile);
return true;
}
/* Open a temporary outputfile to emulate stdout */
int open_tmpoutfile(rzip_control *control)
{
int fd_out;
if (STDOUT && !TEST_ONLY)
print_verbose("Outputting to stdout.\n");
if (control->tmpdir) {
control->outfile = realloc(NULL, strlen(control->tmpdir) + 16);
if (unlikely(!control->outfile))
fatal_return(("Failed to allocate outfile name\n"), -1);
strcpy(control->outfile, control->tmpdir);
strcat(control->outfile, "lrzipout.XXXXXX");
}
fd_out = mkstemp(control->outfile);
if (fd_out == -1) {
print_progress("WARNING: Failed to create out tmpfile: %s, will fail if cannot perform %scompression entirely in ram\n",
control->outfile, DECOMPRESS ? "de" : "");
} else
register_outfile(control, control->outfile, TEST_ONLY || STDOUT || !KEEP_BROKEN);
return fd_out;
}
static bool fwrite_stdout(rzip_control *control, void *buf, i64 len)
{
uchar *offset_buf = buf;
ssize_t ret;
i64 total;
total = 0;
while (len > 0) {
if (len > one_g)
ret = one_g;
else
ret = len;
ret = fwrite(offset_buf, 1, ret, control->outFILE);
if (unlikely(ret <= 0))
fatal_return(("Failed to fwrite in fwrite_stdout\n"), false);
len -= ret;
offset_buf += ret;
total += ret;
}
fflush(control->outFILE);
return true;
}
bool write_fdout(rzip_control *control, void *buf, i64 len)
{
uchar *offset_buf = buf;
ssize_t ret;
while (len > 0) {
ret = MIN(len, one_g);
ret = write(control->fd_out, offset_buf, (size_t)ret);
if (unlikely(ret <= 0))
fatal_return(("Failed to write to fd_out in write_fdout\n"), false);
len -= ret;
offset_buf += ret;
}
return true;
}
bool flush_tmpoutbuf(rzip_control *control)
{
if (!TEST_ONLY) {
print_maxverbose("Dumping buffer to physical file.\n");
if (STDOUT) {
if (unlikely(!fwrite_stdout(control, control->tmp_outbuf, control->out_len)))
return false;
} else {
if (unlikely(!write_fdout(control, control->tmp_outbuf, control->out_len)))
return false;
}
}
control->out_relofs += control->out_len;
control->out_ofs = control->out_len = 0;
return true;
}
/* Dump temporary outputfile to perform stdout */
bool dump_tmpoutfile(rzip_control *control, int fd_out)
{
FILE *tmpoutfp;
int tmpchar;
if (unlikely(fd_out == -1))
fatal_return(("Failed: No temporary outfile created, unable to do in ram\n"), false);
/* flush anything not yet in the temporary file */
fsync(fd_out);
tmpoutfp = fdopen(fd_out, "r");
if (unlikely(tmpoutfp == NULL))
fatal_return(("Failed to fdopen out tmpfile\n"), false);
rewind(tmpoutfp);
if (!TEST_ONLY) {
print_verbose("Dumping temporary file to control->outFILE.\n");
while ((tmpchar = fgetc(tmpoutfp)) != EOF)
putchar(tmpchar);
fflush(control->outFILE);
rewind(tmpoutfp);
}
if (unlikely(ftruncate(fd_out, 0)))
fatal_return(("Failed to ftruncate fd_out in dump_tmpoutfile\n"), false);
return true;
}
/* Used if we're unable to read STDIN into the temporary buffer, shunts data
* to temporary file */
bool write_fdin(rzip_control *control)
{
uchar *offset_buf = control->tmp_inbuf;
i64 len = control->in_len;
ssize_t ret;
while (len > 0) {
ret = MIN(len, one_g);
ret = write(control->fd_in, offset_buf, (size_t)ret);
if (unlikely(ret <= 0))
fatal_return(("Failed to write to fd_in in write_fdin\n"), false);
len -= ret;
offset_buf += ret;
}
return true;
}
/* Open a temporary inputfile to perform stdin decompression */
int open_tmpinfile(rzip_control *control)
{
int fd_in = -1;
/* Use temporary directory if there is one */
if (control->tmpdir) {
control->infile = malloc(strlen(control->tmpdir) + 15);
if (unlikely(!control->infile))
fatal_return(("Failed to allocate infile name\n"), -1);
strcpy(control->infile, control->tmpdir);
strcat(control->infile, "lrzipin.XXXXXX");
fd_in = mkstemp(control->infile);
}
/* Try the current directory */
if (fd_in == -1) {
dealloc(control->infile);
control->infile = malloc(16);
if (unlikely(!control->infile))
fatal_return(("Failed to allocate infile name\n"), -1);
strcpy(control->infile, "lrzipin.XXXXXX");
fd_in = mkstemp(control->infile);
}
/* Use /tmp if nothing is writeable so far */
if (fd_in == -1) {
dealloc(control->infile);
control->infile = malloc(20);
if (unlikely(!control->infile))
fatal_return(("Failed to allocate infile name\n"), -1);
strcpy(control->infile, "/tmp/lrzipin.XXXXXX");
fd_in = mkstemp(control->infile);
}
if (fd_in == -1) {
print_progress("WARNING: Failed to create in tmpfile: %s, will fail if cannot perform %scompression entirely in ram\n",
control->infile, DECOMPRESS ? "de" : "");
} else {
register_infile(control, control->infile, (DECOMPRESS || TEST_ONLY) && STDIN);
/* Unlink temporary file immediately to minimise chance of files left
* lying around in cases of failure_return((. */
if (unlikely(unlink(control->infile))) {
fatal("Failed to unlink tmpfile: %s\n", control->infile);
close(fd_in);
return -1;
}
}
return fd_in;
}
static bool read_tmpinmagic(rzip_control *control)
{
char magic[MAGIC_LEN];
int i, tmpchar;
memset(magic, 0, sizeof(magic));
for (i = 0; i < 24; i++) {
tmpchar = getchar();
if (unlikely(tmpchar == EOF))
failure_return(("Reached end of file on STDIN prematurely on v05 magic read\n"), false);
magic[i] = (char)tmpchar;
}
return get_magic(control, magic);
}
/* Read data from stdin into temporary inputfile */
bool read_tmpinfile(rzip_control *control, int fd_in)
{
FILE *tmpinfp;
int tmpchar;
if (fd_in == -1)
return false;
if (control->flags & FLAG_SHOW_PROGRESS)
fprintf(control->msgout, "Copying from stdin.\n");
tmpinfp = fdopen(fd_in, "w+");
if (unlikely(tmpinfp == NULL))
fatal_return(("Failed to fdopen in tmpfile\n"), false);
while ((tmpchar = getchar()) != EOF)
fputc(tmpchar, tmpinfp);
fflush(tmpinfp);
rewind(tmpinfp);
return true;
}
/* To perform STDOUT, we allocate a proportion of ram that is then used as
* a pseudo-temporary file */
static bool open_tmpoutbuf(rzip_control *control)
{
i64 maxlen = control->maxram;
void *buf;
while (42) {
round_to_page(&maxlen);
buf = malloc(maxlen);
if (buf) {
print_maxverbose("Malloced %"PRId64" for tmp_outbuf\n", maxlen);
break;
}
maxlen = maxlen / 3 * 2;
if (maxlen < 100000000)
fatal_return(("Unable to even malloc 100MB for tmp_outbuf\n"), false);
}
control->flags |= FLAG_TMP_OUTBUF;
/* Allocate slightly more so we can cope when the buffer overflows and
* fall back to a real temporary file */
control->out_maxlen = maxlen - control->page_size;
control->tmp_outbuf = buf;
if (!DECOMPRESS && !TEST_ONLY)
control->out_ofs = control->out_len = MAGIC_LEN;\
return true;
}
/* We've decided to use a temporary output file instead of trying to store
* all the output buffer in ram so we can free up the ram and increase the
* maximum sizes of ram we can allocate */
void close_tmpoutbuf(rzip_control *control)
{
control->flags &= ~FLAG_TMP_OUTBUF;
dealloc(control->tmp_outbuf);
if (!BITS32)
control->usable_ram = control->maxram += control->ramsize / 18;
}
static bool open_tmpinbuf(rzip_control *control)
{
control->flags |= FLAG_TMP_INBUF;
control->in_maxlen = control->maxram;
control->tmp_inbuf = malloc(control->maxram + control->page_size);
if (unlikely(!control->tmp_inbuf))
fatal_return(("Failed to malloc tmp_inbuf in open_tmpinbuf\n"), false);
return true;
}
void clear_tmpinbuf(rzip_control *control)
{
control->in_len = control->in_ofs = 0;
}
bool clear_tmpinfile(rzip_control *control)
{
if (unlikely(lseek(control->fd_in, 0, SEEK_SET)))
fatal_return(("Failed to lseek on fd_in in clear_tmpinfile\n"), false);
if (unlikely(ftruncate(control->fd_in, 0)))
fatal_return(("Failed to truncate fd_in in clear_tmpinfile\n"), false);
return true;
}
/* As per temporary output file but for input file */
void close_tmpinbuf(rzip_control *control)
{
control->flags &= ~FLAG_TMP_INBUF;
dealloc(control->tmp_inbuf);
if (!BITS32)
control->usable_ram = control->maxram += control->ramsize / 18;
}
static int get_pass(rzip_control *control, char *s)
{
int len;
memset(s, 0, PASS_LEN - SALT_LEN);
if (control->passphrase)
strncpy(s, control->passphrase, PASS_LEN - SALT_LEN - 1);
else if (unlikely(fgets(s, PASS_LEN - SALT_LEN, stdin) == NULL))
failure_return(("Failed to retrieve passphrase\n"), -1);
len = strlen(s);
if (len > 0 && ('\r' == s[len - 1] || '\n' == s[len - 1]))
s[len - 1] = '\0';
if (len > 1 && ('\r' == s[len - 2] || '\n' == s[len - 2]))
s[len - 2] = '\0';
len = strlen(s);
if (unlikely(0 == len))
failure_return(("Empty passphrase\n"), -1);
return len;
}
static bool get_hash(rzip_control *control, int make_hash)
{
char *passphrase, *testphrase;
struct termios termios_p;
int prompt = control->passphrase == NULL;
passphrase = calloc(PASS_LEN, 1);
testphrase = calloc(PASS_LEN, 1);
control->salt_pass = calloc(PASS_LEN, 1);
control->hash = calloc(HASH_LEN, 1);
if (unlikely(!passphrase || !testphrase || !control->salt_pass || !control->hash)) {
fatal("Failed to calloc encrypt buffers in compress_file\n");
dealloc(testphrase);
dealloc(passphrase);
return false;
}
mlock(passphrase, PASS_LEN);
mlock(testphrase, PASS_LEN);
mlock(control->salt_pass, PASS_LEN);
mlock(control->hash, HASH_LEN);
if (control->pass_cb) {
control->pass_cb(control->pass_data, passphrase, PASS_LEN - SALT_LEN);
if (!passphrase[0]) {
fatal("Supplied password was null!");
munlock(passphrase, PASS_LEN);
munlock(testphrase, PASS_LEN);
dealloc(testphrase);
dealloc(passphrase);
release_hashes(control);
return false;
}
control->salt_pass_len = strlen(passphrase) + SALT_LEN;
} else {
/* Disable stdin echo to screen */
tcgetattr(fileno(stdin), &termios_p);
termios_p.c_lflag &= ~ECHO;
tcsetattr(fileno(stdin), 0, &termios_p);
retry_pass:
if (prompt)
print_output("Enter passphrase: ");
control->salt_pass_len = get_pass(control, passphrase) + SALT_LEN;
if (prompt)
print_output("\n");
if (make_hash) {
if (prompt)
print_output("Re-enter passphrase: ");
get_pass(control, testphrase);
if (prompt)
print_output("\n");
if (strcmp(passphrase, testphrase)) {
print_output("Passwords do not match. Try again.\n");
goto retry_pass;
}
}
termios_p.c_lflag |= ECHO;
tcsetattr(fileno(stdin), 0, &termios_p);
memset(testphrase, 0, PASS_LEN);
}
memcpy(control->salt_pass, control->salt, SALT_LEN);
memcpy(control->salt_pass + SALT_LEN, passphrase, PASS_LEN - SALT_LEN);
lrz_stretch(control);
memset(passphrase, 0, PASS_LEN);
munlock(passphrase, PASS_LEN);
munlock(testphrase, PASS_LEN);
dealloc(testphrase);
dealloc(passphrase);
return true;
}
static void release_hashes(rzip_control *control)
{
memset(control->salt_pass, 0, PASS_LEN);
memset(control->hash, 0, SALT_LEN);
munlock(control->salt_pass, PASS_LEN);
munlock(control->hash, HASH_LEN);
dealloc(control->salt_pass);
dealloc(control->hash);
}
/*
decompress one file from the command line
*/
bool decompress_file(rzip_control *control)
{
char *tmp, *tmpoutfile, *infilecopy = NULL;
int fd_in, fd_out = -1, fd_hist = -1;
i64 expected_size = 0, free_space;
struct statvfs fbuf;
if (!STDIN && !IS_FROM_FILE) {
struct stat fdin_stat;
stat(control->infile, &fdin_stat);
if (!S_ISREG(fdin_stat.st_mode) && (tmp = strrchr(control->infile, '.')) &&
strcmp(tmp,control->suffix)) {
/* make sure infile has an extension. If not, add it
* because manipulations may be made to input filename, set local ptr
*/
infilecopy = alloca(strlen(control->infile) + strlen(control->suffix) + 1);
strcpy(infilecopy, control->infile);
strcat(infilecopy, control->suffix);
} else
infilecopy = strdupa(control->infile);
/* regardless, infilecopy has the input filename */
}
if (!STDOUT && !TEST_ONLY) {
/* if output name already set, use it */
if (control->outname) {
control->outfile = strdup(control->outname);
} else {
/* default output name from infilecopy
* test if outdir specified. If so, strip path from filename of
* infilecopy, then remove suffix.
*/
if (control->outdir && (tmp = strrchr(infilecopy, '/')))
tmpoutfile = strdupa(tmp + 1);
else
tmpoutfile = strdupa(infilecopy);
/* remove suffix to make outfile name */
if ((tmp = strrchr(tmpoutfile, '.')) && !strcmp(tmp, control->suffix))
*tmp='\0';
control->outfile = malloc((control->outdir == NULL? 0: strlen(control->outdir)) + strlen(tmpoutfile) + 1);
if (unlikely(!control->outfile))
fatal_return(("Failed to allocate outfile name\n"), false);
if (control->outdir) { /* prepend control->outdir */
strcpy(control->outfile, control->outdir);
strcat(control->outfile, tmpoutfile);
} else
strcpy(control->outfile, tmpoutfile);
}
if (!STDOUT)
print_progress("Output filename is: %s\n", control->outfile);
}
if ( IS_FROM_FILE ) {
fd_in = fileno(control->inFILE);
}
else if (STDIN) {
fd_in = open_tmpinfile(control);
read_tmpinmagic(control);
if (ENCRYPT)
failure_return(("Cannot decompress encrypted file from STDIN\n"), false);
expected_size = control->st_size;
if (unlikely(!open_tmpinbuf(control)))
return false;
} else {
fd_in = open(infilecopy, O_RDONLY);
if (unlikely(fd_in == -1)) {
fatal_return(("Failed to open %s\n", infilecopy), false);
}
}
control->fd_in = fd_in;
if (!(TEST_ONLY | STDOUT)) {
fd_out = open(control->outfile, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (FORCE_REPLACE && (-1 == fd_out) && (EEXIST == errno)) {
if (unlikely(unlink(control->outfile)))
fatal_return(("Failed to unlink an existing file: %s\n", control->outfile), false);
fd_out = open(control->outfile, O_WRONLY | O_CREAT | O_EXCL, 0666);
}
if (unlikely(fd_out == -1)) {
/* We must ensure we don't delete a file that already
* exists just because we tried to create a new one */
control->flags |= FLAG_KEEP_BROKEN;
fatal_return(("Failed to create %s\n", control->outfile), false);
}
fd_hist = open(control->outfile, O_RDONLY);
if (unlikely(fd_hist == -1))
fatal_return(("Failed to open history file %s\n", control->outfile), false);
/* Can't copy permissions from STDIN */
if (!STDIN)
if (unlikely(!preserve_perms(control, fd_in, fd_out)))
return false;
} else {
fd_out = open_tmpoutfile(control);
if (fd_out == -1) {
fd_hist = -1;
} else {
fd_hist = open(control->outfile, O_RDONLY);
if (unlikely(fd_hist == -1))
fatal_return(("Failed to open history file %s\n", control->outfile), false);
/* Unlink temporary file as soon as possible */
if (unlikely(unlink(control->outfile)))
fatal_return(("Failed to unlink tmpfile: %s\n", control->outfile), false);
}
}
if (STDOUT) {
if (unlikely(!open_tmpoutbuf(control)))
return false;
}
if (!STDIN) {
if (unlikely(!read_magic(control, fd_in, &expected_size)))
return false;
if (unlikely(expected_size < 0))
fatal_return(("Invalid expected size %lld\n", expected_size), false);
}
if (!STDOUT && !TEST_ONLY) {
/* Check if there's enough free space on the device chosen to fit the
* decompressed file. */
if (unlikely(fstatvfs(fd_out, &fbuf)))
fatal_return(("Failed to fstatvfs in decompress_file\n"), false);
free_space = (i64)fbuf.f_bsize * (i64)fbuf.f_bavail;
if (free_space < expected_size) {
if (FORCE_REPLACE)
print_err("Warning, inadequate free space detected, but attempting to decompress due to -f option being used.\n");
else
failure_return(("Inadequate free space to decompress file, use -f to override.\n"), false);
}
}
control->fd_out = fd_out;
control->fd_hist = fd_hist;
if (NO_MD5)
print_verbose("Not performing MD5 hash check\n");
if (HAS_MD5)
print_verbose("MD5 ");
else
print_verbose("CRC32 ");
print_verbose("being used for integrity testing.\n");
if (ENCRYPT)
if (unlikely(!get_hash(control, 0)))
return false;
print_progress("Decompressing...\n");
if (unlikely(runzip_fd(control, fd_in, fd_out, fd_hist, expected_size) < 0))
return false;
if (STDOUT && !TMP_OUTBUF) {
if (unlikely(!dump_tmpoutfile(control, fd_out)))
return false;
}
/* if we get here, no fatal_return(( errors during decompression */
print_progress("\r");
if (!(STDOUT | TEST_ONLY))
print_progress("Output filename is: %s: ", control->outfile);
if (!expected_size)
expected_size = control->st_size;
if (!ENCRYPT)
print_progress("[OK] - %lld bytes \n", expected_size);
else
print_progress("[OK] \n");
if (TMP_OUTBUF)
close_tmpoutbuf(control);
if (fd_out > 0) {
if (unlikely(close(fd_hist) || close(fd_out)))
fatal_return(("Failed to close files\n"), false);
}
if (unlikely(!STDIN && !STDOUT && !TEST_ONLY && !preserve_times(control, fd_in)))
return false;
if ( ! IS_FROM_FILE ) {
close(fd_in);
}
if (!KEEP_FILES && !STDIN) {
if (unlikely(unlink(control->infile)))
fatal_return(("Failed to unlink %s\n", infilecopy), false);
}
if (ENCRYPT)
release_hashes(control);
dealloc(control->outfile);
return true;
}
bool get_header_info(rzip_control *control, int fd_in, uchar *ctype, i64 *c_len,
i64 *u_len, i64 *last_head, int chunk_bytes)
{
if (unlikely(read(fd_in, ctype, 1) != 1))
fatal_return(("Failed to read in get_header_info\n"), false);
*c_len = *u_len = *last_head = 0;
if (control->major_version == 0 && control->minor_version < 4) {
u32 c_len32, u_len32, last_head32;
if (unlikely(read(fd_in, &c_len32, 4) != 4))
fatal_return(("Failed to read in get_header_info"), false);
if (unlikely(read(fd_in, &u_len32, 4) != 4))
fatal_return(("Failed to read in get_header_info"), false);
if (unlikely(read(fd_in, &last_head32, 4) != 4))
fatal_return(("Failed to read in get_header_info"), false);
c_len32 = le32toh(c_len32);
u_len32 = le32toh(u_len32);
last_head32 = le32toh(last_head32);
*c_len = c_len32;
*u_len = u_len32;
*last_head = last_head32;
} else {
int read_len;
if (control->major_version == 0 && control->minor_version == 5)
read_len = 8;
else
read_len = chunk_bytes;
if (unlikely(read(fd_in, c_len, read_len) != read_len))
fatal_return(("Failed to read in get_header_info"), false);
if (unlikely(read(fd_in, u_len, read_len) != read_len))
fatal_return(("Failed to read in get_header_info"), false);
if (unlikely(read(fd_in, last_head, read_len) != read_len))
fatal_return(("Failed to read_i64 in get_header_info"), false);
*c_len = le64toh(*c_len);
*u_len = le64toh(*u_len);
*last_head = le64toh(*last_head);
}
return true;
}
static double percentage(i64 num, i64 den)
{
double d_num, d_den;
if (den < 100) {
d_num = num * 100;
d_den = den;
if (!d_den)
d_den = 1;
} else {
d_num = num;
d_den = den / 100;
}
return d_num / d_den;
}
bool get_fileinfo(rzip_control *control)
{
i64 u_len, c_len, second_last, last_head, utotal = 0, ctotal = 0, ofs = 25, stream_head[2];
i64 expected_size, infile_size, chunk_size = 0, chunk_total = 0;
int header_length, stream = 0, chunk = 0;
char *tmp, *infilecopy = NULL;
char chunk_byte = 0;
long double cratio;
uchar ctype = 0;
struct stat st;
int fd_in;
if (!STDIN) {
struct stat fdin_stat;
stat(control->infile, &fdin_stat);
if (!S_ISREG(fdin_stat.st_mode) && (tmp = strrchr(control->infile, '.')) &&
strcmp(tmp,control->suffix)) {
infilecopy = alloca(strlen(control->infile) + strlen(control->suffix) + 1);
strcpy(infilecopy, control->infile);
strcat(infilecopy, control->suffix);
} else
infilecopy = strdupa(control->infile);
}
if ( IS_FROM_FILE )
fd_in = fileno(control->inFILE);
else if (STDIN)
fd_in = 0;
else {
fd_in = open(infilecopy, O_RDONLY);
if (unlikely(fd_in == -1))
fatal_return(("Failed to open %s\n", infilecopy), false);
}
/* Get file size */
if (unlikely(fstat(fd_in, &st)))
fatal_goto(("bad magic file descriptor!?\n"), error);
infile_size = st.st_size;
/* Get decompressed size */
if (unlikely(!read_magic(control, fd_in, &expected_size)))
goto error;
if (ENCRYPT) {
print_output("Encrypted lrzip archive. No further information available\n");
if (!STDIN && !IS_FROM_FILE)
close(fd_in);
goto out;
}
if (control->major_version == 0 && control->minor_version > 4) {
if (unlikely(read(fd_in, &chunk_byte, 1) != 1))
fatal_goto(("Failed to read chunk_byte in get_fileinfo\n"), error);
if (unlikely(chunk_byte < 1 || chunk_byte > 8))
fatal_goto(("Invalid chunk bytes %d\n", chunk_byte), error);
if (control->major_version == 0 && control->minor_version > 5) {