summaryrefslogtreecommitdiffstats
path: root/configure.ac
blob: ccf211206c0fc48b1bb7d75822f10e557fbf1d34 (plain)
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
AC_PREREQ([2.67])
AC_INIT([cryptsetup],[2.6.1])

dnl library version from <major>.<minor>.<release>[-<suffix>]
LIBCRYPTSETUP_VERSION=$(echo $PACKAGE_VERSION | cut -f1 -d-)
LIBCRYPTSETUP_VERSION_INFO=21:0:9

AM_SILENT_RULES([yes])
AC_CONFIG_SRCDIR(src/cryptsetup.c)
AC_CONFIG_MACRO_DIR([m4])

AC_CONFIG_HEADERS([config.h:config.h.in])

# We do not want to run test in parallel. Really.
# http://lists.gnu.org/archive/html/automake/2013-01/msg00060.html

# For old automake use this
#AM_INIT_AUTOMAKE(dist-xz subdir-objects)
AM_INIT_AUTOMAKE([dist-xz 1.12 serial-tests subdir-objects foreign])

if test "x$prefix" = "xNONE"; then
	sysconfdir=/etc
fi
AC_PREFIX_DEFAULT(/usr)

AC_CANONICAL_HOST
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_CC
AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_MAKE_SET
AC_PROG_MKDIR_P
AC_ENABLE_STATIC(no)
LT_INIT
PKG_PROG_PKG_CONFIG

dnl ==========================================================================
dnl define PKG_CHECK_VAR for old pkg-config <= 0.28
m4_ifndef([AS_VAR_COPY],
[m4_define([AS_VAR_COPY],
[AS_LITERAL_IF([$1[]$2], [$1=$$2], [eval $1=\$$2])])
])
m4_ifndef([PKG_CHECK_VAR], [
AC_DEFUN([PKG_CHECK_VAR],
[AC_REQUIRE([PKG_PROG_PKG_CONFIG])
AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])

_PKG_CONFIG([$1], [variable="][$3]["], [$2])
AS_VAR_COPY([$1], [pkg_cv_][$1])

AS_VAR_IF([$1], [""], [$5], [$4])
])
])
dnl ==========================================================================
dnl AsciiDoc manual pages

AC_ARG_ENABLE([asciidoc],
	AS_HELP_STRING([--disable-asciidoc], [do not generate man pages from asciidoc]),
	[], [enable_asciidoc=yes]
)

AC_PATH_PROG([ASCIIDOCTOR], [asciidoctor])
if test "x$enable_asciidoc" = xyes -a "x$ASCIIDOCTOR" = x; then
	AC_MSG_ERROR([Building man pages requires asciidoctor installed.])
fi
AM_CONDITIONAL([ENABLE_ASCIIDOC], [test "x$enable_asciidoc" = xyes])

have_manpages=no
AS_IF([test -f "$srcdir/man/cryptsetup-open.8"], [
	AC_MSG_NOTICE([re-use already generated man-pages.])
	have_manpages=yes]
)
AM_CONDITIONAL([HAVE_MANPAGES], [test "x$have_manpages" = xyes])

dnl ==========================================================================

AC_C_RESTRICT

AC_HEADER_DIRENT
AC_CHECK_HEADERS(fcntl.h malloc.h inttypes.h uchar.h sys/ioctl.h sys/mman.h \
	sys/sysmacros.h sys/statvfs.h ctype.h unistd.h locale.h byteswap.h endian.h stdint.h)
AC_CHECK_DECLS([O_CLOEXEC],,[AC_DEFINE([O_CLOEXEC],[0], [Defined to 0 if not provided])],
[[
#ifdef HAVE_FCNTL_H
# include <fcntl.h>
#endif
]])

AC_CHECK_HEADERS(uuid/uuid.h,,[AC_MSG_ERROR([You need the uuid library.])])
AC_CHECK_HEADER(libdevmapper.h,,[AC_MSG_ERROR([You need the device-mapper library.])])

AC_ARG_ENABLE([keyring],
	AS_HELP_STRING([--disable-keyring], [disable kernel keyring support and builtin kernel keyring token]),
	[], [enable_keyring=yes])
if test "x$enable_keyring" = "xyes"; then
	AC_CHECK_HEADERS(linux/keyctl.h,,[AC_MSG_ERROR([You need Linux kernel headers with kernel keyring service compiled.])])

	dnl ==========================================================================
	dnl check whether kernel is compiled with kernel keyring service syscalls
	AC_CHECK_DECL(__NR_add_key,,[AC_MSG_ERROR([The kernel is missing add_key syscall.])], [#include <syscall.h>])
	AC_CHECK_DECL(__NR_keyctl,,[AC_MSG_ERROR([The kernel is missing keyctl syscall.])], [#include <syscall.h>])
	AC_CHECK_DECL(__NR_request_key,,[AC_MSG_ERROR([The kernel is missing request_key syscall.])], [#include <syscall.h>])

	dnl ==========================================================================
	dnl check that key_serial_t hasn't been adopted yet in stdlib
	AC_CHECK_TYPES([key_serial_t], [], [], [
	AC_INCLUDES_DEFAULT
	#ifdef HAVE_LINUX_KEYCTL_H
	# include <linux/keyctl.h>
	#endif
	])

	AC_DEFINE(KERNEL_KEYRING, 1, [Enable kernel keyring service support])
fi
AM_CONDITIONAL(KERNEL_KEYRING, test "x$enable_keyring" = "xyes")

saved_LIBS=$LIBS
AC_CHECK_LIB(uuid, uuid_clear, ,[AC_MSG_ERROR([You need the uuid library.])])
AC_SUBST(UUID_LIBS, $LIBS)
LIBS=$saved_LIBS

AC_SEARCH_LIBS([clock_gettime],[rt posix4])
AC_CHECK_FUNCS([posix_memalign clock_gettime posix_fallocate explicit_bzero])

if test "x$enable_largefile" = "xno"; then
  AC_MSG_ERROR([Building with --disable-largefile is not supported, it can cause data corruption.])
fi

AC_C_CONST
AC_C_BIGENDIAN
AC_TYPE_OFF_T
AC_SYS_LARGEFILE
AC_FUNC_FSEEKO
AC_PROG_GCC_TRADITIONAL
AC_FUNC_STRERROR_R

dnl ==========================================================================
dnl LUKS2 external tokens

AC_ARG_ENABLE([external-tokens],
	AS_HELP_STRING([--disable-external-tokens], [disable external LUKS2 tokens]),
	[], [enable_external_tokens=yes])
if test "x$enable_external_tokens" = "xyes"; then
	AC_DEFINE(USE_EXTERNAL_TOKENS, 1, [Use external tokens])
	dnl we need dynamic library loading here
	saved_LIBS=$LIBS
	AC_SEARCH_LIBS([dlsym],[dl])
	AC_CHECK_FUNCS([dlvsym])
	AC_SUBST(DL_LIBS, $LIBS)
	LIBS=$saved_LIBS
fi
AM_CONDITIONAL(EXTERNAL_TOKENS, test "x$enable_external_tokens" = "xyes")

AC_ARG_ENABLE([ssh-token],
	AS_HELP_STRING([--disable-ssh-token], [disable LUKS2 ssh-token]),
	[], [enable_ssh_token=yes])
AM_CONDITIONAL(SSHPLUGIN_TOKEN, test "x$enable_ssh_token" = "xyes")

if test "x$enable_ssh_token" = "xyes" -a "x$enable_external_tokens" = "xno"; then
	AC_MSG_ERROR([Requested LUKS2 ssh-token build, but external tokens are disabled.])
fi

dnl LUKS2 online reencryption
AC_ARG_ENABLE([luks2-reencryption],
	AS_HELP_STRING([--disable-luks2-reencryption], [disable LUKS2 online reencryption extension]),
	[], [enable_luks2_reencryption=yes])
if test "x$enable_luks2_reencryption" = "xyes"; then
	AC_DEFINE(USE_LUKS2_REENCRYPTION, 1, [Use LUKS2 online reencryption extension])
fi

dnl ==========================================================================

AM_GNU_GETTEXT([external],[need-ngettext])
AM_GNU_GETTEXT_VERSION([0.18.3])

dnl ==========================================================================

saved_LIBS=$LIBS
AC_CHECK_LIB(popt, poptConfigFileToString,,
	[AC_MSG_ERROR([You need popt 1.7 or newer to compile.])])
AC_SUBST(POPT_LIBS, $LIBS)
LIBS=$saved_LIBS

dnl ==========================================================================
dnl FIPS extensions
AC_ARG_ENABLE([fips],
	AS_HELP_STRING([--enable-fips], [enable FIPS mode restrictions]))
if test "x$enable_fips" = "xyes"; then
	AC_DEFINE(ENABLE_FIPS, 1, [Enable FIPS mode restrictions])

	if test "x$enable_static" = "xyes" -o "x$enable_static_cryptsetup" = "xyes" ; then
		AC_MSG_ERROR([Static build is not compatible with FIPS.])
	fi
fi

AC_DEFUN([NO_FIPS], [
	if test "x$enable_fips" = "xyes"; then
		AC_MSG_ERROR([This option is not compatible with FIPS.])
	fi
])

dnl ==========================================================================
dnl pwquality library (cryptsetup CLI only)
AC_ARG_ENABLE([pwquality],
	AS_HELP_STRING([--enable-pwquality], [enable password quality checking using pwquality library]))

if test "x$enable_pwquality" = "xyes"; then
	AC_DEFINE(ENABLE_PWQUALITY, 1, [Enable password quality checking using pwquality library])
	PKG_CHECK_MODULES([PWQUALITY], [pwquality >= 1.0.0],,
		AC_MSG_ERROR([You need pwquality library.]))

	dnl FIXME: this is really hack for now
	PWQUALITY_STATIC_LIBS="$PWQUALITY_LIBS -lcrack -lz"
fi

dnl ==========================================================================
dnl fuzzers, it requires own static library compilation later
AC_ARG_ENABLE([fuzz-targets],
	AS_HELP_STRING([--enable-fuzz-targets], [enable building fuzz targets]))
AM_CONDITIONAL(ENABLE_FUZZ_TARGETS, test "x$enable_fuzz_targets" = "xyes")

if test "x$enable_fuzz_targets" = "xyes"; then
	AX_CHECK_COMPILE_FLAG([-fsanitize=fuzzer-no-link],,
		AC_MSG_ERROR([Required compiler options not supported; use clang.]), [-Werror])
fi

dnl ==========================================================================
dnl passwdqc library (cryptsetup CLI only)
AC_ARG_ENABLE([passwdqc],
	AS_HELP_STRING([--enable-passwdqc@<:@=CONFIG_PATH@:>@],
		       [enable password quality checking using passwdqc library (optionally with CONFIG_PATH)]))

case "$enable_passwdqc" in
	""|yes|no) use_passwdqc_config="" ;;
	/*) use_passwdqc_config="$enable_passwdqc"; enable_passwdqc=yes ;;
	*) AC_MSG_ERROR([Unrecognized --enable-passwdqc parameter.]) ;;
esac
AC_DEFINE_UNQUOTED([PASSWDQC_CONFIG_FILE], ["$use_passwdqc_config"], [passwdqc library config file])

if test "x$enable_passwdqc" = "xyes"; then
	AC_DEFINE(ENABLE_PASSWDQC, 1, [Enable password quality checking using passwdqc library])

	saved_LIBS="$LIBS"
	AC_SEARCH_LIBS([passwdqc_check], [passwdqc])
	case "$ac_cv_search_passwdqc_check" in
		no) AC_MSG_ERROR([failed to find passwdqc_check]) ;;
		-l*) PASSWDQC_LIBS="$ac_cv_search_passwdqc_check" ;;
		*) PASSWDQC_LIBS= ;;
	esac
	AC_CHECK_FUNCS([passwdqc_params_free])
	LIBS="$saved_LIBS"
fi

if test "x$enable_pwquality$enable_passwdqc" = "xyesyes"; then
	AC_MSG_ERROR([--enable-pwquality and --enable-passwdqc are mutually incompatible.])
fi

dnl ==========================================================================
dnl Crypto backend functions

AC_DEFUN([CONFIGURE_GCRYPT], [
	if test "x$enable_fips" = "xyes"; then
		GCRYPT_REQ_VERSION=1.4.5
	else
		GCRYPT_REQ_VERSION=1.1.42
	fi

	dnl libgcrypt rejects to use pkgconfig, use AM_PATH_LIBGCRYPT from gcrypt-devel here.
	dnl Do not require gcrypt-devel if other crypto backend is used.
	m4_ifdef([AM_PATH_LIBGCRYPT],[
	AC_ARG_ENABLE([gcrypt-pbkdf2],
		dnl Check if we can use gcrypt PBKDF2 (1.6.0 supports empty password)
		AS_HELP_STRING([--enable-gcrypt-pbkdf2], [force enable internal gcrypt PBKDF2]),
		if test "x$enableval" = "xyes"; then
			[use_internal_pbkdf2=0]
		else
			[use_internal_pbkdf2=1]
		fi,
		[AM_PATH_LIBGCRYPT([1.6.1], [use_internal_pbkdf2=0], [use_internal_pbkdf2=1])])
	AM_PATH_LIBGCRYPT($GCRYPT_REQ_VERSION,,[AC_MSG_ERROR([You need the gcrypt library.])])],
	AC_MSG_ERROR([Missing support for gcrypt: install gcrypt and regenerate configure.]))

	AC_MSG_CHECKING([if internal cryptsetup PBKDF2 is compiled-in])
	if test $use_internal_pbkdf2 = 0; then
		AC_MSG_RESULT([no])
	else
		AC_MSG_RESULT([yes])
		NO_FIPS([])
	fi

	AC_CHECK_DECLS([GCRY_CIPHER_MODE_XTS], [], [], [#include <gcrypt.h>])

	if test "x$enable_static_cryptsetup" = "xyes"; then
		saved_LIBS=$LIBS
		LIBS="$saved_LIBS $LIBGCRYPT_LIBS -static"
		AC_CHECK_LIB(gcrypt, gcry_check_version,,
			AC_MSG_ERROR([Cannot find static gcrypt library.]),
			[-lgpg-error])
		LIBGCRYPT_STATIC_LIBS="$LIBGCRYPT_LIBS -lgpg-error"
		LIBS=$saved_LIBS
        fi

	CRYPTO_CFLAGS=$LIBGCRYPT_CFLAGS
	CRYPTO_LIBS=$LIBGCRYPT_LIBS
	CRYPTO_STATIC_LIBS=$LIBGCRYPT_STATIC_LIBS

	AC_DEFINE_UNQUOTED(GCRYPT_REQ_VERSION, ["$GCRYPT_REQ_VERSION"], [Requested gcrypt version])
])

AC_DEFUN([CONFIGURE_OPENSSL], [
	PKG_CHECK_MODULES([OPENSSL], [openssl >= 0.9.8],,
		AC_MSG_ERROR([You need openssl library.]))
	CRYPTO_CFLAGS=$OPENSSL_CFLAGS
	CRYPTO_LIBS=$OPENSSL_LIBS
	use_internal_pbkdf2=0

	if test "x$enable_static_cryptsetup" = "xyes"; then
		saved_PKG_CONFIG=$PKG_CONFIG
		PKG_CONFIG="$PKG_CONFIG --static"
		PKG_CHECK_MODULES([OPENSSL_STATIC], [openssl])
		CRYPTO_STATIC_LIBS=$OPENSSL_STATIC_LIBS
		PKG_CONFIG=$saved_PKG_CONFIG
	fi
])

AC_DEFUN([CONFIGURE_NSS], [
	if test "x$enable_static_cryptsetup" = "xyes"; then
		AC_MSG_ERROR([Static build of cryptsetup is not supported with NSS.])
	fi

	AC_MSG_WARN([NSS backend does NOT provide backward compatibility (missing ripemd160 hash).])

	PKG_CHECK_MODULES([NSS], [nss],,
		AC_MSG_ERROR([You need nss library.]))

	saved_CFLAGS=$CFLAGS
	CFLAGS="$CFLAGS $NSS_CFLAGS"
	AC_CHECK_DECLS([NSS_GetVersion], [], [], [#include <nss.h>])
	CFLAGS=$saved_CFLAGS

	CRYPTO_CFLAGS=$NSS_CFLAGS
	CRYPTO_LIBS=$NSS_LIBS
	use_internal_pbkdf2=1
	NO_FIPS([])
])

AC_DEFUN([CONFIGURE_KERNEL], [
	AC_CHECK_HEADERS(linux/if_alg.h,,
		[AC_MSG_ERROR([You need Linux kernel headers with userspace crypto interface.])])
#	AC_CHECK_DECLS([AF_ALG],,
#		[AC_MSG_ERROR([You need Linux kernel with userspace crypto interface.])],
#		[#include <sys/socket.h>])
	use_internal_pbkdf2=1
	NO_FIPS([])
])

AC_DEFUN([CONFIGURE_NETTLE], [
	AC_CHECK_HEADERS(nettle/sha.h,,
		[AC_MSG_ERROR([You need Nettle cryptographic library.])])
	AC_CHECK_HEADERS(nettle/version.h)

	saved_LIBS=$LIBS
	AC_CHECK_LIB(nettle, nettle_pbkdf2_hmac_sha256,,
		[AC_MSG_ERROR([You need Nettle library version 2.6 or more recent.])])
	CRYPTO_LIBS=$LIBS
	LIBS=$saved_LIBS

	CRYPTO_STATIC_LIBS=$CRYPTO_LIBS
	use_internal_pbkdf2=0
	NO_FIPS([])
])

dnl ==========================================================================
saved_LIBS=$LIBS

AC_ARG_ENABLE([static-cryptsetup],
	AS_HELP_STRING([--enable-static-cryptsetup], [enable build of static version of tools]))
if test "x$enable_static_cryptsetup" = "xyes"; then
	if test "x$enable_static" = "xno"; then
		AC_MSG_WARN([Requested static cryptsetup build, enabling static library.])
		enable_static=yes
	fi
fi
AM_CONDITIONAL(STATIC_TOOLS, test "x$enable_static_cryptsetup" = "xyes")

AC_ARG_ENABLE([cryptsetup],
	AS_HELP_STRING([--disable-cryptsetup], [disable cryptsetup support]),
	[], [enable_cryptsetup=yes])
AM_CONDITIONAL(CRYPTSETUP, test "x$enable_cryptsetup" = "xyes")

AC_ARG_ENABLE([veritysetup],
	AS_HELP_STRING([--disable-veritysetup], [disable veritysetup support]),
	[], [enable_veritysetup=yes])
AM_CONDITIONAL(VERITYSETUP, test "x$enable_veritysetup" = "xyes")

AC_ARG_ENABLE([integritysetup],
	AS_HELP_STRING([--disable-integritysetup], [disable integritysetup support]),
	[], [enable_integritysetup=yes])
AM_CONDITIONAL(INTEGRITYSETUP, test "x$enable_integritysetup" = "xyes")

AC_ARG_ENABLE([selinux],
	AS_HELP_STRING([--disable-selinux], [disable selinux support [default=auto]]),
	[], [enable_selinux=yes])

AC_ARG_ENABLE([udev],
	AS_HELP_STRING([--disable-udev], [disable udev support]),
	[], [enable_udev=yes])

dnl Try to use pkg-config for devmapper, but fallback to old detection
PKG_CHECK_MODULES([DEVMAPPER], [devmapper >= 1.02.03],, [
	AC_CHECK_LIB(devmapper, dm_task_set_name,,
		[AC_MSG_ERROR([You need the device-mapper library.])])
	AC_CHECK_LIB(devmapper, dm_task_set_message,,
		[AC_MSG_ERROR([The device-mapper library on your system is too old.])])
	DEVMAPPER_LIBS=$LIBS
])
LIBS=$saved_LIBS

LIBS="$LIBS $DEVMAPPER_LIBS"
AC_CHECK_DECLS([dm_task_secure_data], [], [], [#include <libdevmapper.h>])
AC_CHECK_DECLS([dm_task_retry_remove], [], [], [#include <libdevmapper.h>])
AC_CHECK_DECLS([dm_task_deferred_remove], [], [], [#include <libdevmapper.h>])
AC_CHECK_DECLS([dm_device_has_mounted_fs], [], [], [#include <libdevmapper.h>])
AC_CHECK_DECLS([dm_device_has_holders], [], [], [#include <libdevmapper.h>])
AC_CHECK_DECLS([dm_device_get_name], [], [], [#include <libdevmapper.h>])
AC_CHECK_DECLS([DM_DEVICE_GET_TARGET_VERSION], [], [], [#include <libdevmapper.h>])
AC_CHECK_DECLS([DM_UDEV_DISABLE_DISK_RULES_FLAG], [have_cookie=yes], [have_cookie=no], [#include <libdevmapper.h>])
if test "x$enable_udev" = xyes; then
	if test "x$have_cookie" = xno; then
		AC_MSG_WARN([The device-mapper library on your system has no udev support, udev support disabled.])
	else
		AC_DEFINE(USE_UDEV, 1, [Try to use udev synchronisation?])
	fi
fi
LIBS=$saved_LIBS

dnl Check for JSON-C used in LUKS2
PKG_CHECK_MODULES([JSON_C], [json-c])
AC_CHECK_DECLS([json_object_object_add_ex], [], [], [#include <json-c/json.h>])
AC_CHECK_DECLS([json_object_deep_copy], [], [], [#include <json-c/json.h>])

dnl Check for libssh and argp for SSH plugin
if test "x$enable_ssh_token" = "xyes"; then
	PKG_CHECK_MODULES([LIBSSH], [libssh])
	AC_CHECK_DECLS([ssh_session_is_known_server], [], [], [#include <libssh/libssh.h>])
	AC_CHECK_HEADER([argp.h], [], AC_MSG_ERROR([You need argp library.]))
	saved_LIBS=$LIBS
	AC_SEARCH_LIBS([argp_parse],[argp])
	AC_SUBST(ARGP_LIBS, $LIBS)
	LIBS=$saved_LIBS
fi

dnl Crypto backend configuration.
AC_ARG_WITH([crypto_backend],
	AS_HELP_STRING([--with-crypto_backend=BACKEND], [crypto backend (gcrypt/openssl/nss/kernel/nettle) [openssl]]),
	[], [with_crypto_backend=openssl])

dnl Kernel crypto API backend needed for benchmark and tcrypt
AC_ARG_ENABLE([kernel_crypto],
	AS_HELP_STRING([--disable-kernel_crypto], [disable kernel userspace crypto (no benchmark and tcrypt)]),
	[], [enable_kernel_crypto=yes])

if test "x$enable_kernel_crypto" = "xyes"; then
	AC_CHECK_HEADERS(linux/if_alg.h,,
		[AC_MSG_ERROR([You need Linux kernel headers with userspace crypto interface. (Or use --disable-kernel_crypto.)])])
	AC_DEFINE(ENABLE_AF_ALG, 1, [Enable using of kernel userspace crypto])
fi

case $with_crypto_backend in
	gcrypt)  CONFIGURE_GCRYPT([]) ;;
	openssl) CONFIGURE_OPENSSL([]) ;;
	nss)     CONFIGURE_NSS([]) ;;
	kernel)  CONFIGURE_KERNEL([]) ;;
	nettle)  CONFIGURE_NETTLE([]) ;;
	*) AC_MSG_ERROR([Unknown crypto backend.]) ;;
esac
AM_CONDITIONAL(CRYPTO_BACKEND_GCRYPT,  test "$with_crypto_backend" = "gcrypt")
AM_CONDITIONAL(CRYPTO_BACKEND_OPENSSL, test "$with_crypto_backend" = "openssl")
AM_CONDITIONAL(CRYPTO_BACKEND_NSS,     test "$with_crypto_backend" = "nss")
AM_CONDITIONAL(CRYPTO_BACKEND_KERNEL,  test "$with_crypto_backend" = "kernel")
AM_CONDITIONAL(CRYPTO_BACKEND_NETTLE,  test "$with_crypto_backend" = "nettle")

AM_CONDITIONAL(CRYPTO_INTERNAL_PBKDF2, test $use_internal_pbkdf2 = 1)
AC_DEFINE_UNQUOTED(USE_INTERNAL_PBKDF2, [$use_internal_pbkdf2], [Use internal PBKDF2])

dnl Argon2 implementation
AC_ARG_ENABLE([internal-argon2],
	AS_HELP_STRING([--disable-internal-argon2], [disable internal implementation of Argon2 PBKDF]),
	[], [enable_internal_argon2=yes])

AC_ARG_ENABLE([libargon2],
	AS_HELP_STRING([--enable-libargon2], [enable external libargon2 (PHC) library (disables internal bundled version)]))

if test "x$enable_libargon2" = "xyes" ; then
	AC_CHECK_HEADERS(argon2.h,,
		[AC_MSG_ERROR([You need libargon2 development library installed.])])
	AC_CHECK_DECL(Argon2_id,,[AC_MSG_ERROR([You need more recent Argon2 library with support for Argon2id.])], [#include <argon2.h>])
	PKG_CHECK_MODULES([LIBARGON2], [libargon2],,[LIBARGON2_LIBS="-largon2"])
	enable_internal_argon2=no
else
	AC_MSG_WARN([Argon2 bundled (slow) reference implementation will be used, please consider to use system library with --enable-libargon2.])

	AC_ARG_ENABLE([internal-sse-argon2],
		AS_HELP_STRING([--enable-internal-sse-argon2], [enable internal SSE implementation of Argon2 PBKDF]))

	if test "x$enable_internal_sse_argon2" = "xyes"; then
		AC_MSG_CHECKING(if Argon2 SSE optimization can be used)
		AC_LINK_IFELSE([AC_LANG_PROGRAM([[
			#include <emmintrin.h>
			__m128i testfunc(__m128i *a, __m128i *b) {
			  return _mm_xor_si128(_mm_loadu_si128(a), _mm_loadu_si128(b));
			}
		]])],,[enable_internal_sse_argon2=no])
		AC_MSG_RESULT($enable_internal_sse_argon2)
	fi
fi

if test "x$enable_internal_argon2" = "xyes"; then
	AC_DEFINE(USE_INTERNAL_ARGON2, 1, [Use internal Argon2])
fi
AM_CONDITIONAL(CRYPTO_INTERNAL_ARGON2, test "x$enable_internal_argon2" = "xyes")
AM_CONDITIONAL(CRYPTO_INTERNAL_SSE_ARGON2, test "x$enable_internal_sse_argon2" = "xyes")

dnl Link with blkid to check for other device types
AC_ARG_ENABLE([blkid],
	AS_HELP_STRING([--disable-blkid], [disable use of blkid for device signature detection and wiping]),
	[], [enable_blkid=yes])

if test "x$enable_blkid" = "xyes"; then
	PKG_CHECK_MODULES([BLKID], [blkid],[AC_DEFINE([HAVE_BLKID], 1, [Define to 1 to use blkid for detection of disk signatures.])],[LIBBLKID_LIBS="-lblkid"])

	AC_CHECK_HEADERS(blkid/blkid.h,,[AC_MSG_ERROR([You need blkid development library installed.])])
	AC_CHECK_DECL([blkid_do_wipe],
		      [ AC_DEFINE([HAVE_BLKID_WIPE], 1, [Define to 1 to use blkid_do_wipe.])
			enable_blkid_wipe=yes
		      ],,
		      [#include <blkid/blkid.h>])
	AC_CHECK_DECL([blkid_probe_step_back],
		      [ AC_DEFINE([HAVE_BLKID_STEP_BACK], 1, [Define to 1 to use blkid_probe_step_back.])
			enable_blkid_step_back=yes
		      ],,
		      [#include <blkid/blkid.h>])
	AC_CHECK_DECLS([ blkid_reset_probe,
			 blkid_probe_set_device,
			 blkid_probe_filter_superblocks_type,
			 blkid_do_safeprobe,
			 blkid_do_probe,
			 blkid_probe_lookup_value
		       ],,
		       [AC_MSG_ERROR([Can not compile with blkid support, disable it by --disable-blkid.])],
		       [#include <blkid/blkid.h>])
fi
AM_CONDITIONAL(HAVE_BLKID, test "x$enable_blkid" = "xyes")
AM_CONDITIONAL(HAVE_BLKID_WIPE, test "x$enable_blkid_wipe" = "xyes")
AM_CONDITIONAL(HAVE_BLKID_STEP_BACK, test "x$enable_blkid_step_back" = "xyes")

dnl Magic for cryptsetup.static build.
if test "x$enable_static_cryptsetup" = "xyes"; then
	saved_PKG_CONFIG=$PKG_CONFIG
	PKG_CONFIG="$PKG_CONFIG --static"

	LIBS="$saved_LIBS -static"
	AC_CHECK_LIB(popt, poptGetContext,,
		AC_MSG_ERROR([Cannot find static popt library.]))

	dnl Try to detect needed device-mapper static libraries, try pkg-config first.
	LIBS="$saved_LIBS -static"
	PKG_CHECK_MODULES([DEVMAPPER_STATIC], [devmapper >= 1.02.27],,[
		DEVMAPPER_STATIC_LIBS=$DEVMAPPER_LIBS
		if test "x$enable_selinux" = "xyes"; then
			AC_CHECK_LIB(sepol, sepol_bool_set)
			AC_CHECK_LIB(selinux, is_selinux_enabled)
			DEVMAPPER_STATIC_LIBS="$DEVMAPPER_STATIC_LIBS $LIBS"
		fi
	])
	LIBS="$saved_LIBS $DEVMAPPER_STATIC_LIBS"
	AC_CHECK_LIB(devmapper, dm_task_set_uuid,,
		AC_MSG_ERROR([Cannot link with static device-mapper library.]))

	dnl Try to detect uuid static library.
	LIBS="$saved_LIBS -static"
	AC_CHECK_LIB(uuid, uuid_generate,,
		AC_MSG_ERROR([Cannot find static uuid library.]))

	LIBS=$saved_LIBS
	PKG_CONFIG=$saved_PKG_CONFIG
fi

dnl Check compiler support for symver function attribute
AC_MSG_CHECKING([for symver attribute support])
saved_CFLAGS=$CFLAGS
CFLAGS="-O0 -Werror"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
	void _test_sym(void);
	__attribute__((__symver__("sym@VERSION_4.2"))) void _test_sym(void) {}
]],
[[ _test_sym() ]]
)],[
	AC_DEFINE([HAVE_ATTRIBUTE_SYMVER], 1, [Define to 1 to use __attribute__((symver))])
	AC_MSG_RESULT([yes])
], [
	AC_MSG_RESULT([no])
])
CFLAGS=$saved_CFLAGS

AC_MSG_CHECKING([for systemd tmpfiles config directory])
PKG_CHECK_VAR([systemd_tmpfilesdir], [systemd], [tmpfilesdir], [], [systemd_tmpfilesdir=no])
AC_MSG_RESULT([$systemd_tmpfilesdir])

AC_SUBST([DEVMAPPER_LIBS])
AC_SUBST([DEVMAPPER_STATIC_LIBS])

AC_SUBST([PWQUALITY_LIBS])
AC_SUBST([PWQUALITY_STATIC_LIBS])

AC_SUBST([PASSWDQC_LIBS])

AC_SUBST([CRYPTO_CFLAGS])
AC_SUBST([CRYPTO_LIBS])
AC_SUBST([CRYPTO_STATIC_LIBS])

AC_SUBST([JSON_C_LIBS])
AC_SUBST([LIBARGON2_LIBS])
AC_SUBST([BLKID_LIBS])

AC_SUBST([LIBSSH_LIBS])

AC_SUBST([LIBCRYPTSETUP_VERSION])
AC_SUBST([LIBCRYPTSETUP_VERSION_INFO])

dnl Set Requires.private for libcryptsetup.pc
dnl pwquality is used only by tools
PKGMODULES="uuid devmapper json-c"
case $with_crypto_backend in
	gcrypt)  PKGMODULES+=" libgcrypt" ;;
	openssl) PKGMODULES+=" openssl" ;;
	nss)     PKGMODULES+=" nss" ;;
	nettle)  PKGMODULES+=" nettle" ;;
esac
if test "x$enable_libargon2" = "xyes"; then
	PKGMODULES+=" libargon2"
fi
if test "x$enable_blkid" = "xyes"; then
	PKGMODULES+=" blkid"
fi
AC_SUBST([PKGMODULES])
dnl ==========================================================================
AC_ARG_ENABLE([dev-random],
	AS_HELP_STRING([--enable-dev-random], [use /dev/random by default for key generation (otherwise use /dev/urandom)]))
if test "x$enable_dev_random" = "xyes"; then
	default_rng=/dev/random
else
	default_rng=/dev/urandom
fi
AC_DEFINE_UNQUOTED(DEFAULT_RNG, ["$default_rng"], [default RNG type for key generator])

dnl ==========================================================================
AC_DEFUN([CS_DEFINE],
	[AC_DEFINE_UNQUOTED(DEFAULT_[]m4_translit([$1], [-a-z], [_A-Z]), [$2], [$3])
])

AC_DEFUN([CS_STR_WITH], [AC_ARG_WITH([$1],
	[AS_HELP_STRING(--with-[$1], [default $2 [$3]])],
	[CS_DEFINE([$1], ["$withval"], [$2])],
	[CS_DEFINE([$1], ["$3"], [$2])]
)])

AC_DEFUN([CS_NUM_WITH], [AC_ARG_WITH([$1],
	[AS_HELP_STRING(--with-[$1], [default $2 [$3]])],
	[CS_DEFINE([$1], [$withval], [$2])],
	[CS_DEFINE([$1], [$3], [$2])]
)])

AC_DEFUN([CS_ABSPATH], [
	case "$1" in
		/*) ;;
		*) AC_MSG_ERROR([$2 argument must be an absolute path.]);;
	esac
])

dnl ==========================================================================
CS_STR_WITH([plain-hash],   [password hashing function for plain mode], [ripemd160])
CS_STR_WITH([plain-cipher], [cipher for plain mode], [aes])
CS_STR_WITH([plain-mode],   [cipher mode for plain mode], [cbc-essiv:sha256])
CS_NUM_WITH([plain-keybits],[key length in bits for plain mode], [256])

CS_STR_WITH([luks1-hash],   [hash function for LUKS1 header], [sha256])
CS_STR_WITH([luks1-cipher], [cipher for LUKS1], [aes])
CS_STR_WITH([luks1-mode],   [cipher mode for LUKS1], [xts-plain64])
CS_NUM_WITH([luks1-keybits],[key length in bits for LUKS1], [256])

AC_ARG_ENABLE([luks_adjust_xts_keysize], AS_HELP_STRING([--disable-luks-adjust-xts-keysize],
	[XTS mode requires two keys, double default LUKS keysize if needed]),
	[], [enable_luks_adjust_xts_keysize=yes])
if test "x$enable_luks_adjust_xts_keysize" = "xyes"; then
	AC_DEFINE(ENABLE_LUKS_ADJUST_XTS_KEYSIZE, 1, [XTS mode - double default LUKS keysize if needed])
fi

CS_STR_WITH([luks2-pbkdf],           [Default PBKDF algorithm (pbkdf2 or argon2i/argon2id) for LUKS2], [argon2id])
CS_NUM_WITH([luks1-iter-time],       [PBKDF2 iteration time for LUKS1 (in ms)], [2000])
CS_NUM_WITH([luks2-iter-time],       [Argon2 PBKDF iteration time for LUKS2 (in ms)], [2000])
CS_NUM_WITH([luks2-memory-kb],       [Argon2 PBKDF memory cost for LUKS2 (in kB)], [1048576])
CS_NUM_WITH([luks2-parallel-threads],[Argon2 PBKDF max parallel cost for LUKS2 (if CPUs available)], [4])

CS_STR_WITH([luks2-keyslot-cipher], [fallback cipher for LUKS2 keyslot (if data encryption is incompatible)], [aes-xts-plain64])
CS_NUM_WITH([luks2-keyslot-keybits],[fallback key size for LUKS2 keyslot (if data encryption is incompatible)], [512])

CS_STR_WITH([loopaes-cipher], [cipher for loop-AES mode], [aes])
CS_NUM_WITH([loopaes-keybits],[key length in bits for loop-AES mode], [256])

CS_NUM_WITH([keyfile-size-maxkb],[maximum keyfile size (in KiB)], [8192])
CS_NUM_WITH([integrity-keyfile-size-maxkb],[maximum integritysetup keyfile size (in KiB)], [4])
CS_NUM_WITH([passphrase-size-max],[maximum passphrase size (in characters)], [512])

CS_STR_WITH([verity-hash],       [hash function for verity mode], [sha256])
CS_NUM_WITH([verity-data-block], [data block size for verity mode], [4096])
CS_NUM_WITH([verity-hash-block], [hash block size for verity mode], [4096])
CS_NUM_WITH([verity-salt-size],  [salt size for verity mode], [32])
CS_NUM_WITH([verity-fec-roots],  [parity bytes for verity FEC], [2])

CS_STR_WITH([tmpfilesdir], [override default path to directory with systemd temporary files], [])
test -z "$with_tmpfilesdir" && with_tmpfilesdir=$systemd_tmpfilesdir
test "x$with_tmpfilesdir" = "xno" || {
	CS_ABSPATH([${with_tmpfilesdir}],[with-tmpfilesdir])
	DEFAULT_TMPFILESDIR=$with_tmpfilesdir
	AC_SUBST(DEFAULT_TMPFILESDIR)
}
AM_CONDITIONAL(CRYPTSETUP_TMPFILE, test -n "$DEFAULT_TMPFILESDIR")

CS_STR_WITH([luks2-lock-path], [path to directory for LUKSv2 locks], [/run/cryptsetup])
test -z "$with_luks2_lock_path" && with_luks2_lock_path=/run/cryptsetup
CS_ABSPATH([${with_luks2_lock_path}],[with-luks2-lock-path])
DEFAULT_LUKS2_LOCK_PATH=$with_luks2_lock_path
AC_SUBST(DEFAULT_LUKS2_LOCK_PATH)

CS_NUM_WITH([luks2-lock-dir-perms], [default luks2 locking directory permissions], [0700])
test -z "$with_luks2_lock_dir_perms" && with_luks2_lock_dir_perms=0700
DEFAULT_LUKS2_LOCK_DIR_PERMS=$with_luks2_lock_dir_perms
AC_SUBST(DEFAULT_LUKS2_LOCK_DIR_PERMS)

CS_STR_WITH([luks2-external-tokens-path], [path to directory with LUKSv2 external token handlers (plugins)], [LIBDIR/cryptsetup])
if test -n "$with_luks2_external_tokens_path"; then
	CS_ABSPATH([${with_luks2_external_tokens_path}],[with-luks2-external-tokens-path])
	EXTERNAL_LUKS2_TOKENS_PATH=$with_luks2_external_tokens_path
else
	EXTERNAL_LUKS2_TOKENS_PATH="\${libdir}/cryptsetup"
fi
AC_SUBST(EXTERNAL_LUKS2_TOKENS_PATH)

dnl Override default LUKS format version (for cryptsetup or cryptsetup-reencrypt format actions only).
AC_ARG_WITH([default_luks_format],
	AS_HELP_STRING([--with-default-luks-format=FORMAT], [default LUKS format version (LUKS1/LUKS2) [LUKS2]]),
	[], [with_default_luks_format=LUKS2])

case $with_default_luks_format in
	LUKS1) default_luks=CRYPT_LUKS1 ;;
	LUKS2) default_luks=CRYPT_LUKS2 ;;
	*) AC_MSG_ERROR([Unknown default LUKS format. Use LUKS1 or LUKS2 only.]) ;;
esac
AC_DEFINE_UNQUOTED([DEFAULT_LUKS_FORMAT], [$default_luks], [default LUKS format version])

dnl ==========================================================================

AC_CONFIG_FILES([ Makefile
lib/libcryptsetup.pc
po/Makefile.in
scripts/cryptsetup.conf
tests/Makefile
tests/fuzz/Makefile
])
AC_OUTPUT