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  • Committer: Teddy Hogeborn
  • Date: 2015-03-10 18:03:38 UTC
  • Revision ID: teddy@recompile.se-20150310180338-pcxw6r2qmw9k6br9
Add ":!RSA" to GnuTLS priority string, to disallow non-DHE kx.

If Mandos was somehow made to use a non-ephemeral Diffie-Hellman key
exchange algorithm in the TLS handshake, any saved network traffic
could then be decrypted later if the Mandos client key was obtained.
By default, Mandos uses ephemeral DH key exchanges which does not have
this problem, but a non-ephemeral key exchange algorithm was still
enabled by default.  The simplest solution is to simply turn that off,
which ensures that Mandos will always use ephemeral DH key exchanges.

There is a "PFS" priority string specifier, but we can't use it because:

1. Security-wise, it is a mix between "NORMAL" and "SECURE128" - it
   enables a lot more algorithms than "SECURE256".

2. It is only available since GnuTLS 3.2.4.

Thanks to Andreas Fischer <af@bantuX.org> for reporting this issue.

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Makefile
1
 
WARN=-O -Wall -Wformat=2 -Winit-self -Wmissing-include-dirs \
2
 
        -Wswitch-default -Wswitch-enum -Wunused-parameter \
3
 
        -Wstrict-aliasing=1 -Wextra -Wfloat-equal -Wundef -Wshadow \
 
1
WARN=-O -Wall -Wextra -Wdouble-promotion -Wformat=2 -Winit-self \
 
2
        -Wmissing-include-dirs -Wswitch-default -Wswitch-enum \
 
3
        -Wunused -Wuninitialized -Wstrict-overflow=5 \
 
4
        -Wsuggest-attribute=pure -Wsuggest-attribute=const \
 
5
        -Wsuggest-attribute=noreturn -Wfloat-equal -Wundef -Wshadow \
4
6
        -Wunsafe-loop-optimizations -Wpointer-arith \
5
7
        -Wbad-function-cast -Wcast-qual -Wcast-align -Wwrite-strings \
6
 
        -Wconversion -Wstrict-prototypes -Wold-style-definition \
7
 
        -Wpacked -Wnested-externs -Winline -Wvolatile-register-var
8
 
#       -Wunreachable-code 
 
8
        -Wconversion -Wlogical-op -Waggregate-return \
 
9
        -Wstrict-prototypes -Wold-style-definition \
 
10
        -Wmissing-format-attribute -Wnormalized=nfc -Wpacked \
 
11
        -Wredundant-decls -Wnested-externs -Winline -Wvla \
 
12
        -Wvolatile-register-var -Woverlength-strings
9
13
#DEBUG=-ggdb3
10
 
# For info about _FORTIFY_SOURCE, see
11
 
# <http://www.kernel.org/doc/man-pages/online/pages/man7/feature_test_macros.7.html>
 
14
# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
12
15
# and <http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
13
16
FORTIFY=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
14
17
LINK_FORTIFY_LD=-z relro -z now
20
23
LINK_FORTIFY += -pie
21
24
endif
22
25
#COVERAGE=--coverage
23
 
OPTIMIZE=-Os
 
26
OPTIMIZE=-Os -fno-strict-aliasing
24
27
LANGUAGE=-std=gnu99
25
28
htmldir=man
26
 
version=1.2
 
29
version=1.6.9
27
30
SED=sed
28
31
 
 
32
USER=$(firstword $(subst :, ,$(shell getent passwd _mandos || getent passwd nobody || echo 65534)))
 
33
GROUP=$(firstword $(subst :, ,$(shell getent group _mandos || getent group nobody || echo 65534)))
 
34
 
29
35
## Use these settings for a traditional /usr/local install
30
36
# PREFIX=$(DESTDIR)/usr/local
31
37
# CONFDIR=$(DESTDIR)/etc/mandos
32
38
# KEYDIR=$(DESTDIR)/etc/mandos/keys
33
39
# MANDIR=$(PREFIX)/man
34
40
# INITRAMFSTOOLS=$(DESTDIR)/etc/initramfs-tools
 
41
# STATEDIR=$(DESTDIR)/var/lib/mandos
 
42
# LIBDIR=$(PREFIX)/lib
35
43
##
36
44
 
37
45
## These settings are for a package-type install
40
48
KEYDIR=$(DESTDIR)/etc/keys/mandos
41
49
MANDIR=$(PREFIX)/share/man
42
50
INITRAMFSTOOLS=$(DESTDIR)/usr/share/initramfs-tools
 
51
STATEDIR=$(DESTDIR)/var/lib/mandos
 
52
LIBDIR=$(shell \
 
53
        for d in \
 
54
        "/usr/lib/`dpkg-architecture -qDEB_HOST_MULTIARCH 2>/dev/null`" \
 
55
        "`rpm --eval='%{_libdir}' 2>/dev/null`" /usr/lib; do \
 
56
                if [ -d "$$d" -a "$$d" = "$${d%/}" ]; then \
 
57
                        echo "$(DESTDIR)$$d"; \
 
58
                        break; \
 
59
                fi; \
 
60
        done)
43
61
##
44
62
 
 
63
SYSTEMD=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
 
64
 
45
65
GNUTLS_CFLAGS=$(shell pkg-config --cflags-only-I gnutls)
46
66
GNUTLS_LIBS=$(shell pkg-config --libs gnutls)
47
67
AVAHI_CFLAGS=$(shell pkg-config --cflags-only-I avahi-core)
51
71
        getconf LFS_LDFLAGS)
52
72
 
53
73
# Do not change these two
54
 
CFLAGS=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) $(OPTIMIZE) \
 
74
CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) $(OPTIMIZE) \
55
75
        $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) \
56
76
        -DVERSION='"$(version)"'
57
 
LDFLAGS=$(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
 
77
LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
58
78
 
59
79
# Commands to format a DocBook <refentry> document into a manual page
60
80
DOCBOOKTOMAN=$(strip cd $(dir $<); xsltproc --nonet --xinclude \
63
83
        --param make.single.year.ranges         1 \
64
84
        --param man.output.quietly              1 \
65
85
        --param man.authors.section.enabled     0 \
66
 
         /usr/share/xml/docbook/stylesheet/nwalsh/manpages/docbook.xsl \
 
86
        /usr/share/xml/docbook/stylesheet/nwalsh/manpages/docbook.xsl \
67
87
        $(notdir $<); \
68
 
        $(MANPOST) $(notdir $@))
69
 
# DocBook-to-man post-processing to fix a '\n' escape bug
70
 
MANPOST=$(SED) --in-place --expression='s,\\\\en,\\en,g;s,\\n,\\en,g'
 
88
        if locale --all 2>/dev/null | grep --regexp='^en_US\.utf8$$' \
 
89
        && type man 2>/dev/null; then LANG=en_US.UTF-8 MANWIDTH=80 \
 
90
        man --warnings --encoding=UTF-8 --local-file $(notdir $@); \
 
91
        fi >/dev/null)
71
92
 
72
93
DOCBOOKTOHTML=$(strip xsltproc --nonet --xinclude \
73
94
        --param make.year.ranges                1 \
92
113
        plugins.d/mandos-client.8mandos \
93
114
        plugins.d/password-prompt.8mandos plugins.d/usplash.8mandos \
94
115
        plugins.d/splashy.8mandos plugins.d/askpass-fifo.8mandos \
95
 
        plugins.d/plymouth.8mandos
 
116
        plugins.d/plymouth.8mandos intro.8mandos
96
117
 
97
118
htmldocs=$(addsuffix .xhtml,$(DOCS))
98
119
 
119
140
%.8mandos.xhtml: %.xml common.ent legalnotice.xml
120
141
        $(DOCBOOKTOHTML)
121
142
 
 
143
intro.8mandos: intro.xml common.ent legalnotice.xml
 
144
        $(DOCBOOKTOMAN)
 
145
intro.8mandos.xhtml: intro.xml common.ent legalnotice.xml
 
146
        $(DOCBOOKTOHTML)
 
147
 
122
148
mandos.8: mandos.xml common.ent mandos-options.xml overview.xml \
123
149
                legalnotice.xml
124
150
        $(DOCBOOKTOMAN)
210
236
                $@)
211
237
 
212
238
plugins.d/mandos-client: plugins.d/mandos-client.c
213
 
        $(LINK.c) $(GNUTLS_LIBS) $(AVAHI_LIBS) $(GPGME_LIBS) $(strip\
214
 
                ) $(COMMON) $^ $(LOADLIBES) $(LDLIBS) -o $@
 
239
        $(LINK.c) $^ -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
 
240
                ) $(GPGME_LIBS) $(LOADLIBES) $(LDLIBS) -o $@
215
241
 
216
 
.PHONY : all doc html clean distclean run-client run-server install \
217
 
        install-server install-client uninstall uninstall-server \
218
 
        uninstall-client purge purge-server purge-client
 
242
.PHONY : all doc html clean distclean mostlyclean maintainer-clean \
 
243
        check run-client run-server install install-html \
 
244
        install-server install-client-nokey install-client uninstall \
 
245
        uninstall-server uninstall-client purge purge-server \
 
246
        purge-client
219
247
 
220
248
clean:
221
249
        -rm --force $(CPROGS) $(objects) $(htmldocs) $(DOCS) core
223
251
distclean: clean
224
252
mostlyclean: clean
225
253
maintainer-clean: clean
226
 
        -rm --force --recursive keydir confdir
 
254
        -rm --force --recursive keydir confdir statedir
227
255
 
228
256
check:  all
229
257
        ./mandos --check
 
258
        ./mandos-ctl --check
230
259
 
231
260
# Run the client with a local config and key
232
261
run-client: all keydir/seckey.txt keydir/pubkey.txt
235
264
        @echo "# ignored.  The messages are caused by not running as root, but   #"
236
265
        @echo "# you should NOT run \"make run-client\" as root unless you also    #"
237
266
        @echo "# unpacked and compiled Mandos as root, which is NOT recommended. #"
238
 
        @echo "# From plugin-runner: setuid: Operation not permitted             #"
 
267
        @echo "# From plugin-runner: setgid: Operation not permitted             #"
 
268
        @echo "#                     setuid: Operation not permitted             #"
239
269
        @echo "# From askpass-fifo:  mkfifo: Permission denied                   #"
240
 
        @echo "# From mandos-client: setuid: Operation not permitted             #"
241
 
        @echo "#                     seteuid: Operation not permitted            #"
242
 
        @echo "#                     klogctl: Operation not permitted            #"
 
270
        @echo "# From mandos-client:                                             #"
 
271
        @echo "#             Failed to raise privileges: Operation not permitted #"
 
272
        @echo "#             Warning: network hook \"*\" exited with status *      #"
243
273
        @echo "###################################################################"
 
274
# We set GNOME_KEYRING_CONTROL to block pam_gnome_keyring
244
275
        ./plugin-runner --plugin-dir=plugins.d \
245
276
                --config-file=plugin-runner.conf \
246
 
                --options-for=mandos-client:--seckey=keydir/seckey.txt,--pubkey=keydir/pubkey.txt \
 
277
                --options-for=mandos-client:--seckey=keydir/seckey.txt,--pubkey=keydir/pubkey.txt,--network-hook-dir=network-hooks.d \
 
278
                --env-for=mandos-client:GNOME_KEYRING_CONTROL= \
247
279
                $(CLIENTARGS)
248
280
 
249
281
# Used by run-client
252
284
        ./mandos-keygen --dir keydir --force
253
285
 
254
286
# Run the server with a local config
255
 
run-server: confdir/mandos.conf confdir/clients.conf
256
 
        @echo "#################################################################"
257
 
        @echo "# NOTE: Please IGNORE the error about \"Could not open file      #"
258
 
        @echo "# u'/var/run/mandos.pid'\" -  it is harmless and is caused by    #"
259
 
        @echo "# the server not running as root.  Do NOT run \"make run-server\" #"
260
 
        @echo "# server as root if you didn't also unpack and compile it thus. #"
261
 
        @echo "#################################################################"
262
 
        ./mandos --debug --no-dbus --configdir=confdir $(SERVERARGS)
 
287
run-server: confdir/mandos.conf confdir/clients.conf statedir
 
288
        ./mandos --debug --no-dbus --configdir=confdir \
 
289
                --statedir=statedir $(SERVERARGS)
263
290
 
264
291
# Used by run-server
265
292
confdir/mandos.conf: mandos.conf
269
296
        install --directory confdir
270
297
        install --mode=u=rw $< $@
271
298
# Add a client password
272
 
        ./mandos-keygen --dir keydir --password >> $@
 
299
        ./mandos-keygen --dir keydir --password --no-ssh >> $@
 
300
statedir:
 
301
        install --directory statedir
273
302
 
274
303
install: install-server install-client-nokey
275
304
 
280
309
 
281
310
install-server: doc
282
311
        install --directory $(CONFDIR)
 
312
        if install --directory --mode=u=rwx --owner=$(USER) \
 
313
                --group=$(GROUP) $(STATEDIR); then \
 
314
                :; \
 
315
        elif install --directory --mode=u=rwx $(STATEDIR); then \
 
316
                chown -- $(USER):$(GROUP) $(STATEDIR) || :; \
 
317
        fi
283
318
        install --mode=u=rwx,go=rx mandos $(PREFIX)/sbin/mandos
284
319
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
285
320
                mandos-ctl
293
328
                $(DESTDIR)/etc/dbus-1/system.d/mandos.conf
294
329
        install --mode=u=rwx,go=rx init.d-mandos \
295
330
                $(DESTDIR)/etc/init.d/mandos
 
331
        if [ "$(SYSTEMD)" != "$(DESTDIR)" -a -d "$(SYSTEMD)" ]; then \
 
332
                install --mode=u=rw,go=r mandos.service $(SYSTEMD); \
 
333
        fi
296
334
        install --mode=u=rw,go=r default-mandos \
297
335
                $(DESTDIR)/etc/default/mandos
298
336
        if [ -z $(DESTDIR) ]; then \
308
346
                > $(MANDIR)/man5/mandos.conf.5.gz
309
347
        gzip --best --to-stdout mandos-clients.conf.5 \
310
348
                > $(MANDIR)/man5/mandos-clients.conf.5.gz
 
349
        gzip --best --to-stdout intro.8mandos \
 
350
                > $(MANDIR)/man8/intro.8mandos.gz
311
351
 
312
352
install-client-nokey: all doc
313
 
        install --directory $(PREFIX)/lib/mandos $(CONFDIR)
 
353
        install --directory $(LIBDIR)/mandos $(CONFDIR)
314
354
        install --directory --mode=u=rwx $(KEYDIR) \
315
 
                $(PREFIX)/lib/mandos/plugins.d
316
 
        if [ "$(CONFDIR)" != "$(PREFIX)/lib/mandos" ]; then \
 
355
                $(LIBDIR)/mandos/plugins.d
 
356
        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
317
357
                install --mode=u=rwx \
318
358
                        --directory "$(CONFDIR)/plugins.d"; \
319
359
        fi
 
360
        install --mode=u=rwx,go=rx --directory \
 
361
                "$(CONFDIR)/network-hooks.d"
320
362
        install --mode=u=rwx,go=rx \
321
 
                --target-directory=$(PREFIX)/lib/mandos plugin-runner
 
363
                --target-directory=$(LIBDIR)/mandos plugin-runner
322
364
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
323
365
                mandos-keygen
324
366
        install --mode=u=rwx,go=rx \
325
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
367
                --target-directory=$(LIBDIR)/mandos/plugins.d \
326
368
                plugins.d/password-prompt
327
369
        install --mode=u=rwxs,go=rx \
328
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
370
                --target-directory=$(LIBDIR)/mandos/plugins.d \
329
371
                plugins.d/mandos-client
330
372
        install --mode=u=rwxs,go=rx \
331
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
373
                --target-directory=$(LIBDIR)/mandos/plugins.d \
332
374
                plugins.d/usplash
333
375
        install --mode=u=rwxs,go=rx \
334
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
376
                --target-directory=$(LIBDIR)/mandos/plugins.d \
335
377
                plugins.d/splashy
336
378
        install --mode=u=rwxs,go=rx \
337
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
379
                --target-directory=$(LIBDIR)/mandos/plugins.d \
338
380
                plugins.d/askpass-fifo
339
381
        install --mode=u=rwxs,go=rx \
340
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
382
                --target-directory=$(LIBDIR)/mandos/plugins.d \
341
383
                plugins.d/plymouth
342
384
        install initramfs-tools-hook \
343
385
                $(INITRAMFSTOOLS)/hooks/mandos
389
431
        ! grep --regexp='^ *[^ #].*keyscript=[^,=]*/mandos/' \
390
432
                $(DESTDIR)/etc/crypttab
391
433
        -rm --force $(PREFIX)/sbin/mandos-keygen \
392
 
                $(PREFIX)/lib/mandos/plugin-runner \
393
 
                $(PREFIX)/lib/mandos/plugins.d/password-prompt \
394
 
                $(PREFIX)/lib/mandos/plugins.d/mandos-client \
395
 
                $(PREFIX)/lib/mandos/plugins.d/usplash \
396
 
                $(PREFIX)/lib/mandos/plugins.d/splashy \
397
 
                $(PREFIX)/lib/mandos/plugins.d/askpass-fifo \
398
 
                $(PREFIX)/lib/mandos/plugins.d/plymouth \
 
434
                $(LIBDIR)/mandos/plugin-runner \
 
435
                $(LIBDIR)/mandos/plugins.d/password-prompt \
 
436
                $(LIBDIR)/mandos/plugins.d/mandos-client \
 
437
                $(LIBDIR)/mandos/plugins.d/usplash \
 
438
                $(LIBDIR)/mandos/plugins.d/splashy \
 
439
                $(LIBDIR)/mandos/plugins.d/askpass-fifo \
 
440
                $(LIBDIR)/mandos/plugins.d/plymouth \
399
441
                $(INITRAMFSTOOLS)/hooks/mandos \
400
442
                $(INITRAMFSTOOLS)/conf-hooks.d/mandos \
401
443
                $(INITRAMFSTOOLS)/scripts/init-premount/mandos \
407
449
                $(MANDIR)/man8/splashy.8mandos.gz \
408
450
                $(MANDIR)/man8/askpass-fifo.8mandos.gz \
409
451
                $(MANDIR)/man8/plymouth.8mandos.gz \
410
 
        -rmdir $(PREFIX)/lib/mandos/plugins.d $(CONFDIR)/plugins.d \
411
 
                 $(PREFIX)/lib/mandos $(CONFDIR) $(KEYDIR)
 
452
        -rmdir $(LIBDIR)/mandos/plugins.d $(CONFDIR)/plugins.d \
 
453
                 $(LIBDIR)/mandos $(CONFDIR) $(KEYDIR)
412
454
        update-initramfs -k all -u
413
455
 
414
456
purge: purge-server purge-client
418
460
                $(DESTDIR)/etc/dbus-1/system.d/mandos.conf
419
461
                $(DESTDIR)/etc/default/mandos \
420
462
                $(DESTDIR)/etc/init.d/mandos \
 
463
                $(SYSTEMD)/mandos.service \
 
464
                $(DESTDIR)/run/mandos.pid \
421
465
                $(DESTDIR)/var/run/mandos.pid
422
466
        -rmdir $(CONFDIR)
423
467