/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2016-03-17 20:40:55 UTC
  • Revision ID: teddy@recompile.se-20160317204055-bhsh5xsidq7w5cxu
Client: Fix plymouth agent; broken since 1.7.2.

Fix an very old memory bug in the plymouth agent (which has been
present since its apperance in version 1.2), but which was only
recently detected at run time due to the new -fsanitize=address
compile- time flag, which has been used since version 1.7.2.  This
detection of a memory access violation causes the program to abort,
making the Plymouth graphical boot system unable to accept interactive
input of passwords when using the Mandos client.

* plugins.d/plymouth.c (exec_and_wait): Fix memory allocation bug when
  allocating new_argv.  Also tolerate a zero-length argv.

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Lines of Context:
Makefile
1
 
WARN:=-O -Wall -Wextra -Wdouble-promotion -Wformat=2 -Winit-self \
 
1
WARN=-O -Wall -Wextra -Wdouble-promotion -Wformat=2 -Winit-self \
2
2
        -Wmissing-include-dirs -Wswitch-default -Wswitch-enum \
3
3
        -Wunused -Wuninitialized -Wstrict-overflow=5 \
4
4
        -Wsuggest-attribute=pure -Wsuggest-attribute=const \
10
10
        -Wmissing-format-attribute -Wnormalized=nfc -Wpacked \
11
11
        -Wredundant-decls -Wnested-externs -Winline -Wvla \
12
12
        -Wvolatile-register-var -Woverlength-strings
13
 
 
14
 
#DEBUG:=-ggdb3 -fsanitize=address $(SANITIZE)
15
 
## Check which sanitizing options can be used
16
 
#SANITIZE:=$(foreach option,$(ALL_SANITIZE_OPTIONS),$(shell \
17
 
#       echo 'int main(){}' | $(CC) --language=c $(option) \
18
 
#       /dev/stdin -o /dev/null >/dev/null 2>&1 && echo $(option)))
 
13
#DEBUG=-ggdb3
 
14
# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
 
15
# and <http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
 
16
FORTIFY=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
19
17
# <https://developerblog.redhat.com/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/>
20
 
ALL_SANITIZE_OPTIONS:=-fsanitize=leak -fsanitize=undefined \
 
18
ALL_SANITIZE_OPTIONS:=-fsanitize=address -fsanitize=undefined \
21
19
        -fsanitize=shift -fsanitize=integer-divide-by-zero \
22
20
        -fsanitize=unreachable -fsanitize=vla-bound -fsanitize=null \
23
21
        -fsanitize=return -fsanitize=signed-integer-overflow \
25
23
        -fsanitize=object-size -fsanitize=float-divide-by-zero \
26
24
        -fsanitize=float-cast-overflow -fsanitize=nonnull-attribute \
27
25
        -fsanitize=returns-nonnull-attribute -fsanitize=bool \
28
 
        -fsanitize=enum -fsanitize-address-use-after-scope
29
 
 
30
 
# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
31
 
# and <https://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
32
 
FORTIFY:=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
33
 
LINK_FORTIFY_LD:=-z relro -z now
34
 
LINK_FORTIFY:=
 
26
        -fsanitize=enum
 
27
# Check which sanitizing options can be used
 
28
SANITIZE:=$(foreach option,$(ALL_SANITIZE_OPTIONS),$(shell \
 
29
        echo 'int main(){}' | $(CC) --language=c $(option) /dev/stdin \
 
30
        -o /dev/null >/dev/null 2>&1 && echo $(option)))
 
31
LINK_FORTIFY_LD=-z relro -z now
 
32
LINK_FORTIFY=
35
33
 
36
34
# If BROKEN_PIE is set, do not build with -pie
37
35
ifndef BROKEN_PIE
39
37
LINK_FORTIFY += -pie
40
38
endif
41
39
#COVERAGE=--coverage
42
 
OPTIMIZE:=-Os -fno-strict-aliasing
43
 
LANGUAGE:=-std=gnu11
44
 
htmldir:=man
45
 
version:=1.8.4
46
 
SED:=sed
 
40
OPTIMIZE=-Os -fno-strict-aliasing
 
41
LANGUAGE=-std=gnu11
 
42
htmldir=man
 
43
version=1.7.6
 
44
SED=sed
47
45
 
48
 
USER:=$(firstword $(subst :, ,$(shell getent passwd _mandos \
49
 
        || getent passwd nobody || echo 65534)))
50
 
GROUP:=$(firstword $(subst :, ,$(shell getent group _mandos \
51
 
        || getent group nogroup || echo 65534)))
 
46
USER=$(firstword $(subst :, ,$(shell getent passwd _mandos || getent passwd nobody || echo 65534)))
 
47
GROUP=$(firstword $(subst :, ,$(shell getent group _mandos || getent group nogroup || echo 65534)))
52
48
 
53
49
## Use these settings for a traditional /usr/local install
54
 
# PREFIX:=$(DESTDIR)/usr/local
55
 
# CONFDIR:=$(DESTDIR)/etc/mandos
56
 
# KEYDIR:=$(DESTDIR)/etc/mandos/keys
57
 
# MANDIR:=$(PREFIX)/man
58
 
# INITRAMFSTOOLS:=$(DESTDIR)/etc/initramfs-tools
59
 
# STATEDIR:=$(DESTDIR)/var/lib/mandos
60
 
# LIBDIR:=$(PREFIX)/lib
 
50
# PREFIX=$(DESTDIR)/usr/local
 
51
# CONFDIR=$(DESTDIR)/etc/mandos
 
52
# KEYDIR=$(DESTDIR)/etc/mandos/keys
 
53
# MANDIR=$(PREFIX)/man
 
54
# INITRAMFSTOOLS=$(DESTDIR)/etc/initramfs-tools
 
55
# STATEDIR=$(DESTDIR)/var/lib/mandos
 
56
# LIBDIR=$(PREFIX)/lib
61
57
##
62
58
 
63
59
## These settings are for a package-type install
64
 
PREFIX:=$(DESTDIR)/usr
65
 
CONFDIR:=$(DESTDIR)/etc/mandos
66
 
KEYDIR:=$(DESTDIR)/etc/keys/mandos
67
 
MANDIR:=$(PREFIX)/share/man
68
 
INITRAMFSTOOLS:=$(DESTDIR)/usr/share/initramfs-tools
69
 
STATEDIR:=$(DESTDIR)/var/lib/mandos
70
 
LIBDIR:=$(shell \
 
60
PREFIX=$(DESTDIR)/usr
 
61
CONFDIR=$(DESTDIR)/etc/mandos
 
62
KEYDIR=$(DESTDIR)/etc/keys/mandos
 
63
MANDIR=$(PREFIX)/share/man
 
64
INITRAMFSTOOLS=$(DESTDIR)/usr/share/initramfs-tools
 
65
STATEDIR=$(DESTDIR)/var/lib/mandos
 
66
LIBDIR=$(shell \
71
67
        for d in \
72
68
        "/usr/lib/`dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null`" \
73
69
        "`rpm --eval='%{_libdir}' 2>/dev/null`" /usr/lib; do \
78
74
        done)
79
75
##
80
76
 
81
 
SYSTEMD:=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
82
 
TMPFILES:=$(DESTDIR)$(shell pkg-config systemd --variable=tmpfilesdir)
 
77
SYSTEMD=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
83
78
 
84
 
GNUTLS_CFLAGS:=$(shell pkg-config --cflags-only-I gnutls)
85
 
GNUTLS_LIBS:=$(shell pkg-config --libs gnutls)
86
 
AVAHI_CFLAGS:=$(shell pkg-config --cflags-only-I avahi-core)
87
 
AVAHI_LIBS:=$(shell pkg-config --libs avahi-core)
88
 
GPGME_CFLAGS:=$(shell gpgme-config --cflags; getconf LFS_CFLAGS)
89
 
GPGME_LIBS:=$(shell gpgme-config --libs; getconf LFS_LIBS; \
 
79
GNUTLS_CFLAGS=$(shell pkg-config --cflags-only-I gnutls)
 
80
GNUTLS_LIBS=$(shell pkg-config --libs gnutls)
 
81
AVAHI_CFLAGS=$(shell pkg-config --cflags-only-I avahi-core)
 
82
AVAHI_LIBS=$(shell pkg-config --libs avahi-core)
 
83
GPGME_CFLAGS=$(shell gpgme-config --cflags; getconf LFS_CFLAGS)
 
84
GPGME_LIBS=$(shell gpgme-config --libs; getconf LFS_LIBS; \
90
85
        getconf LFS_LDFLAGS)
91
 
LIBNL3_CFLAGS:=$(shell pkg-config --cflags-only-I libnl-route-3.0)
92
 
LIBNL3_LIBS:=$(shell pkg-config --libs libnl-route-3.0)
 
86
LIBNL3_CFLAGS=$(shell pkg-config --cflags-only-I libnl-route-3.0)
 
87
LIBNL3_LIBS=$(shell pkg-config --libs libnl-route-3.0)
93
88
 
94
89
# Do not change these two
95
 
CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) \
96
 
        $(OPTIMIZE) $(LANGUAGE) -DVERSION='"$(version)"'
97
 
LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(strip \
98
 
        ) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
 
90
CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(SANITIZE) $(COVERAGE) \
 
91
        $(OPTIMIZE) $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) \
 
92
        $(GPGME_CFLAGS) -DVERSION='"$(version)"'
 
93
LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
99
94
 
100
95
# Commands to format a DocBook <refentry> document into a manual page
101
96
DOCBOOKTOMAN=$(strip cd $(dir $<); xsltproc --nonet --xinclude \
107
102
        /usr/share/xml/docbook/stylesheet/nwalsh/manpages/docbook.xsl \
108
103
        $(notdir $<); \
109
104
        if locale --all 2>/dev/null | grep --regexp='^en_US\.utf8$$' \
110
 
        && command -v man >/dev/null; then LANG=en_US.UTF-8 \
111
 
        MANWIDTH=80 man --warnings --encoding=UTF-8 --local-file \
112
 
        $(notdir $@); fi >/dev/null)
 
105
        && type man 2>/dev/null; then LANG=en_US.UTF-8 MANWIDTH=80 \
 
106
        man --warnings --encoding=UTF-8 --local-file $(notdir $@); \
 
107
        fi >/dev/null)
113
108
 
114
109
DOCBOOKTOHTML=$(strip xsltproc --nonet --xinclude \
115
110
        --param make.year.ranges                1 \
121
116
        /usr/share/xml/docbook/stylesheet/nwalsh/xhtml/docbook.xsl \
122
117
        $<; $(HTMLPOST) $@)
123
118
# Fix citerefentry links
124
 
HTMLPOST:=$(SED) --in-place \
 
119
HTMLPOST=$(SED) --in-place \
125
120
        --expression='s/\(<a class="citerefentry" href="\)\("><span class="citerefentry"><span class="refentrytitle">\)\([^<]*\)\(<\/span>(\)\([^)]*\)\()<\/span><\/a>\)/\1\3.\5\2\3\4\5\6/g'
126
121
 
127
 
PLUGINS:=plugins.d/password-prompt plugins.d/mandos-client \
 
122
PLUGINS=plugins.d/password-prompt plugins.d/mandos-client \
128
123
        plugins.d/usplash plugins.d/splashy plugins.d/askpass-fifo \
129
124
        plugins.d/plymouth
130
 
PLUGIN_HELPERS:=plugin-helpers/mandos-client-iprouteadddel
131
 
CPROGS:=plugin-runner $(PLUGINS) $(PLUGIN_HELPERS)
132
 
PROGS:=mandos mandos-keygen mandos-ctl mandos-monitor $(CPROGS)
133
 
DOCS:=mandos.8 mandos-keygen.8 mandos-monitor.8 mandos-ctl.8 \
 
125
PLUGIN_HELPERS=plugin-helpers/mandos-client-iprouteadddel
 
126
CPROGS=plugin-runner $(PLUGINS) $(PLUGIN_HELPERS)
 
127
PROGS=mandos mandos-keygen mandos-ctl mandos-monitor $(CPROGS)
 
128
DOCS=mandos.8 mandos-keygen.8 mandos-monitor.8 mandos-ctl.8 \
134
129
        mandos.conf.5 mandos-clients.conf.5 plugin-runner.8mandos \
135
130
        plugins.d/mandos-client.8mandos \
136
131
        plugins.d/password-prompt.8mandos plugins.d/usplash.8mandos \
137
132
        plugins.d/splashy.8mandos plugins.d/askpass-fifo.8mandos \
138
133
        plugins.d/plymouth.8mandos intro.8mandos
139
134
 
140
 
htmldocs:=$(addsuffix .xhtml,$(DOCS))
 
135
htmldocs=$(addsuffix .xhtml,$(DOCS))
141
136
 
142
 
objects:=$(addsuffix .o,$(CPROGS))
 
137
objects=$(addsuffix .o,$(CPROGS))
143
138
 
144
139
all: $(PROGS) mandos.lsm
145
140
 
257
252
                --expression='s/\(mandos_\)[0-9.]\+\(\.orig\.tar\.gz\)/\1$(version)\2/' \
258
253
                $@)
259
254
 
260
 
# Need to add the GnuTLS, Avahi and GPGME libraries
261
255
plugins.d/mandos-client: plugins.d/mandos-client.c
262
 
        $(LINK.c) $^ $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(strip\
263
 
                ) $(GPGME_CFLAGS) $(GNUTLS_LIBS) $(strip\
264
 
                ) $(AVAHI_LIBS) $(GPGME_LIBS) $(LOADLIBES) $(strip\
265
 
                ) $(LDLIBS) -o $@
 
256
        $(LINK.c) $^ -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
 
257
                ) $(GPGME_LIBS) $(LOADLIBES) $(LDLIBS) -o $@
266
258
 
267
 
# Need to add the libnl-route library
268
259
plugin-helpers/mandos-client-iprouteadddel: plugin-helpers/mandos-client-iprouteadddel.c
269
260
        $(LINK.c) $(LIBNL3_CFLAGS) $^ $(LIBNL3_LIBS) $(strip\
270
261
                ) $(LOADLIBES) $(LDLIBS) -o $@
283
274
maintainer-clean: clean
284
275
        -rm --force --recursive keydir confdir statedir
285
276
 
286
 
check: all
 
277
check:  all
287
278
        ./mandos --check
288
279
        ./mandos-ctl --check
289
 
        ./mandos-keygen --version
290
 
        ./plugin-runner --version
291
 
        ./plugin-helpers/mandos-client-iprouteadddel --version
292
280
 
293
281
# Run the client with a local config and key
294
 
run-client: all keydir/seckey.txt keydir/pubkey.txt keydir/tls-privkey.pem keydir/tls-pubkey.pem
 
282
run-client: all keydir/seckey.txt keydir/pubkey.txt
295
283
        @echo "###################################################################"
296
284
        @echo "# The following error messages are harmless and can be safely     #"
297
 
        @echo "# ignored:                                                        #"
 
285
        @echo "# ignored.  The messages are caused by not running as root, but   #"
 
286
        @echo "# you should NOT run \"make run-client\" as root unless you also    #"
 
287
        @echo "# unpacked and compiled Mandos as root, which is NOT recommended. #"
298
288
        @echo "# From plugin-runner: setgid: Operation not permitted             #"
299
289
        @echo "#                     setuid: Operation not permitted             #"
300
290
        @echo "# From askpass-fifo:  mkfifo: Permission denied                   #"
301
291
        @echo "# From mandos-client:                                             #"
302
292
        @echo "#             Failed to raise privileges: Operation not permitted #"
303
293
        @echo "#             Warning: network hook \"*\" exited with status *      #"
304
 
        @echo "#                                                                 #"
305
 
        @echo "# (The messages are caused by not running as root, but you should #"
306
 
        @echo "# NOT run \"make run-client\" as root unless you also unpacked and  #"
307
 
        @echo "# compiled Mandos as root, which is also NOT recommended.)        #"
308
294
        @echo "###################################################################"
309
295
# We set GNOME_KEYRING_CONTROL to block pam_gnome_keyring
310
296
        ./plugin-runner --plugin-dir=plugins.d \
311
297
                --plugin-helper-dir=plugin-helpers \
312
298
                --config-file=plugin-runner.conf \
313
 
                --options-for=mandos-client:--seckey=keydir/seckey.txt,--pubkey=keydir/pubkey.txt,--tls-privkey=keydir/tls-privkey.pem,--tls-pubkey=keydir/tls-pubkey.pem,--network-hook-dir=network-hooks.d \
 
299
                --options-for=mandos-client:--seckey=keydir/seckey.txt,--pubkey=keydir/pubkey.txt,--network-hook-dir=network-hooks.d \
314
300
                --env-for=mandos-client:GNOME_KEYRING_CONTROL= \
315
301
                $(CLIENTARGS)
316
302
 
317
303
# Used by run-client
318
 
keydir/seckey.txt keydir/pubkey.txt keydir/tls-privkey.pem keydir/tls-pubkey.pem: mandos-keygen
 
304
keydir/seckey.txt keydir/pubkey.txt: mandos-keygen
319
305
        install --directory keydir
320
306
        ./mandos-keygen --dir keydir --force
321
307
 
328
314
confdir/mandos.conf: mandos.conf
329
315
        install --directory confdir
330
316
        install --mode=u=rw,go=r $^ $@
331
 
confdir/clients.conf: clients.conf keydir/seckey.txt keydir/tls-pubkey.pem
 
317
confdir/clients.conf: clients.conf keydir/seckey.txt
332
318
        install --directory confdir
333
319
        install --mode=u=rw $< $@
334
320
# Add a client password
351
337
        elif install --directory --mode=u=rwx $(STATEDIR); then \
352
338
                chown -- $(USER):$(GROUP) $(STATEDIR) || :; \
353
339
        fi
354
 
        if [ "$(TMPFILES)" != "$(DESTDIR)" -a -d "$(TMPFILES)" ]; then \
355
 
                install --mode=u=rw,go=r tmpfiles.d-mandos.conf \
356
 
                        $(TMPFILES)/mandos.conf; \
357
 
        fi
358
340
        install --mode=u=rwx,go=rx mandos $(PREFIX)/sbin/mandos
359
341
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
360
342
                mandos-ctl
396
378
                $(LIBDIR)/mandos/plugin-helpers
397
379
        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
398
380
                install --mode=u=rwx \
399
 
                        --directory "$(CONFDIR)/plugins.d" \
400
 
                        "$(CONFDIR)/plugin-helpers"; \
 
381
                        --directory "$(CONFDIR)/plugins.d"; \
 
382
                install --directory "$(CONFDIR)/plugin-helpers"; \
401
383
        fi
402
384
        install --mode=u=rwx,go=rx --directory \
403
385
                "$(CONFDIR)/network-hooks.d"
404
386
        install --mode=u=rwx,go=rx \
405
387
                --target-directory=$(LIBDIR)/mandos plugin-runner
406
 
        install --mode=u=rwx,go=rx \
407
 
                --target-directory=$(LIBDIR)/mandos mandos-to-cryptroot-unlock
408
388
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
409
389
                mandos-keygen
410
390
        install --mode=u=rwx,go=rx \
425
405
        install --mode=u=rwxs,go=rx \
426
406
                --target-directory=$(LIBDIR)/mandos/plugins.d \
427
407
                plugins.d/plymouth
428
 
        install --mode=u=rwx,go=rx \
 
408
        install --mode=u=rwxs,go=rx \
429
409
                --target-directory=$(LIBDIR)/mandos/plugin-helpers \
430
410
                plugin-helpers/mandos-client-iprouteadddel
431
411
        install initramfs-tools-hook \
432
412
                $(INITRAMFSTOOLS)/hooks/mandos
433
 
        install --mode=u=rw,go=r initramfs-tools-conf \
434
 
                $(INITRAMFSTOOLS)/conf.d/mandos-conf
435
 
        install --mode=u=rw,go=r initramfs-tools-conf-hook \
436
 
                $(INITRAMFSTOOLS)/conf-hooks.d/zz-mandos
 
413
        install --mode=u=rw,go=r initramfs-tools-hook-conf \
 
414
                $(INITRAMFSTOOLS)/conf-hooks.d/mandos
437
415
        install initramfs-tools-script \
438
416
                $(INITRAMFSTOOLS)/scripts/init-premount/mandos
439
 
        install initramfs-tools-script-stop \
440
 
                $(INITRAMFSTOOLS)/scripts/local-premount/mandos
441
417
        install --mode=u=rw,go=r plugin-runner.conf $(CONFDIR)
442
418
        gzip --best --to-stdout mandos-keygen.8 \
443
419
                > $(MANDIR)/man8/mandos-keygen.8.gz
517
493
        -rmdir $(CONFDIR)
518
494
 
519
495
purge-client: uninstall-client
520
 
        -shred --remove $(KEYDIR)/seckey.txt $(KEYDIR)/tls-privkey.pem
 
496
        -shred --remove $(KEYDIR)/seckey.txt
521
497
        -rm --force $(CONFDIR)/plugin-runner.conf \
522
 
                $(KEYDIR)/pubkey.txt $(KEYDIR)/seckey.txt \
523
 
                $(KEYDIR)/tls-pubkey.txt $(KEYDIR)/tls-privkey.txt
 
498
                $(KEYDIR)/pubkey.txt $(KEYDIR)/seckey.txt
524
499
        -rmdir $(KEYDIR) $(CONFDIR)/plugins.d $(CONFDIR)