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  • Committer: Teddy Hogeborn
  • Date: 2015-03-10 18:03:38 UTC
  • mto: (237.7.304 trunk)
  • mto: This revision was merged to the branch mainline in revision 325.
  • 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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Lines of Context:
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=1.3.1
 
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
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        $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) \
56
76
        -DVERSION='"$(version)"'
57
 
LDFLAGS=-Xlinker --as-needed $(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 \
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        --param make.single.year.ranges         1 \
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        --param man.output.quietly              1 \
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        --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
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        $(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
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DOCBOOKTOHTML=$(strip xsltproc --nonet --xinclude \
73
94
        --param make.year.ranges                1 \
218
239
        $(LINK.c) $^ -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
219
240
                ) $(GPGME_LIBS) $(LOADLIBES) $(LDLIBS) -o $@
220
241
 
221
 
.PHONY : all doc html clean distclean run-client run-server install \
222
 
        install-server install-client uninstall uninstall-server \
223
 
        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
224
247
 
225
248
clean:
226
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        -rm --force $(CPROGS) $(objects) $(htmldocs) $(DOCS) core
228
251
distclean: clean
229
252
mostlyclean: clean
230
253
maintainer-clean: clean
231
 
        -rm --force --recursive keydir confdir
 
254
        -rm --force --recursive keydir confdir statedir
232
255
 
233
256
check:  all
234
257
        ./mandos --check
 
258
        ./mandos-ctl --check
235
259
 
236
260
# Run the client with a local config and key
237
261
run-client: all keydir/seckey.txt keydir/pubkey.txt
240
264
        @echo "# ignored.  The messages are caused by not running as root, but   #"
241
265
        @echo "# you should NOT run \"make run-client\" as root unless you also    #"
242
266
        @echo "# unpacked and compiled Mandos as root, which is NOT recommended. #"
243
 
        @echo "# From plugin-runner: setuid: Operation not permitted             #"
 
267
        @echo "# From plugin-runner: setgid: Operation not permitted             #"
 
268
        @echo "#                     setuid: Operation not permitted             #"
244
269
        @echo "# From askpass-fifo:  mkfifo: Permission denied                   #"
245
 
        @echo "# From mandos-client: setuid: Operation not permitted             #"
246
 
        @echo "#                     seteuid: Operation not permitted            #"
247
 
        @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 *      #"
248
273
        @echo "###################################################################"
 
274
# We set GNOME_KEYRING_CONTROL to block pam_gnome_keyring
249
275
        ./plugin-runner --plugin-dir=plugins.d \
250
276
                --config-file=plugin-runner.conf \
251
 
                --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= \
252
279
                $(CLIENTARGS)
253
280
 
254
281
# Used by run-client
257
284
        ./mandos-keygen --dir keydir --force
258
285
 
259
286
# Run the server with a local config
260
 
run-server: confdir/mandos.conf confdir/clients.conf
261
 
        @echo "#################################################################"
262
 
        @echo "# NOTE: Please IGNORE the error about \"Could not open file      #"
263
 
        @echo "# u'/var/run/mandos.pid'\" -  it is harmless and is caused by    #"
264
 
        @echo "# the server not running as root.  Do NOT run \"make run-server\" #"
265
 
        @echo "# server as root if you didn't also unpack and compile it thus. #"
266
 
        @echo "#################################################################"
267
 
        ./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)
268
290
 
269
291
# Used by run-server
270
292
confdir/mandos.conf: mandos.conf
274
296
        install --directory confdir
275
297
        install --mode=u=rw $< $@
276
298
# Add a client password
277
 
        ./mandos-keygen --dir keydir --password >> $@
 
299
        ./mandos-keygen --dir keydir --password --no-ssh >> $@
 
300
statedir:
 
301
        install --directory statedir
278
302
 
279
303
install: install-server install-client-nokey
280
304
 
285
309
 
286
310
install-server: doc
287
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
288
318
        install --mode=u=rwx,go=rx mandos $(PREFIX)/sbin/mandos
289
319
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
290
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                mandos-ctl
298
328
                $(DESTDIR)/etc/dbus-1/system.d/mandos.conf
299
329
        install --mode=u=rwx,go=rx init.d-mandos \
300
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
301
334
        install --mode=u=rw,go=r default-mandos \
302
335
                $(DESTDIR)/etc/default/mandos
303
336
        if [ -z $(DESTDIR) ]; then \
313
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                > $(MANDIR)/man5/mandos.conf.5.gz
314
347
        gzip --best --to-stdout mandos-clients.conf.5 \
315
348
                > $(MANDIR)/man5/mandos-clients.conf.5.gz
 
349
        gzip --best --to-stdout intro.8mandos \
 
350
                > $(MANDIR)/man8/intro.8mandos.gz
316
351
 
317
352
install-client-nokey: all doc
318
 
        install --directory $(PREFIX)/lib/mandos $(CONFDIR)
 
353
        install --directory $(LIBDIR)/mandos $(CONFDIR)
319
354
        install --directory --mode=u=rwx $(KEYDIR) \
320
 
                $(PREFIX)/lib/mandos/plugins.d
321
 
        if [ "$(CONFDIR)" != "$(PREFIX)/lib/mandos" ]; then \
 
355
                $(LIBDIR)/mandos/plugins.d
 
356
        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
322
357
                install --mode=u=rwx \
323
358
                        --directory "$(CONFDIR)/plugins.d"; \
324
359
        fi
 
360
        install --mode=u=rwx,go=rx --directory \
 
361
                "$(CONFDIR)/network-hooks.d"
325
362
        install --mode=u=rwx,go=rx \
326
 
                --target-directory=$(PREFIX)/lib/mandos plugin-runner
 
363
                --target-directory=$(LIBDIR)/mandos plugin-runner
327
364
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
328
365
                mandos-keygen
329
366
        install --mode=u=rwx,go=rx \
330
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
367
                --target-directory=$(LIBDIR)/mandos/plugins.d \
331
368
                plugins.d/password-prompt
332
369
        install --mode=u=rwxs,go=rx \
333
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
370
                --target-directory=$(LIBDIR)/mandos/plugins.d \
334
371
                plugins.d/mandos-client
335
372
        install --mode=u=rwxs,go=rx \
336
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
373
                --target-directory=$(LIBDIR)/mandos/plugins.d \
337
374
                plugins.d/usplash
338
375
        install --mode=u=rwxs,go=rx \
339
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
376
                --target-directory=$(LIBDIR)/mandos/plugins.d \
340
377
                plugins.d/splashy
341
378
        install --mode=u=rwxs,go=rx \
342
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
379
                --target-directory=$(LIBDIR)/mandos/plugins.d \
343
380
                plugins.d/askpass-fifo
344
381
        install --mode=u=rwxs,go=rx \
345
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
382
                --target-directory=$(LIBDIR)/mandos/plugins.d \
346
383
                plugins.d/plymouth
347
384
        install initramfs-tools-hook \
348
385
                $(INITRAMFSTOOLS)/hooks/mandos
394
431
        ! grep --regexp='^ *[^ #].*keyscript=[^,=]*/mandos/' \
395
432
                $(DESTDIR)/etc/crypttab
396
433
        -rm --force $(PREFIX)/sbin/mandos-keygen \
397
 
                $(PREFIX)/lib/mandos/plugin-runner \
398
 
                $(PREFIX)/lib/mandos/plugins.d/password-prompt \
399
 
                $(PREFIX)/lib/mandos/plugins.d/mandos-client \
400
 
                $(PREFIX)/lib/mandos/plugins.d/usplash \
401
 
                $(PREFIX)/lib/mandos/plugins.d/splashy \
402
 
                $(PREFIX)/lib/mandos/plugins.d/askpass-fifo \
403
 
                $(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 \
404
441
                $(INITRAMFSTOOLS)/hooks/mandos \
405
442
                $(INITRAMFSTOOLS)/conf-hooks.d/mandos \
406
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                $(INITRAMFSTOOLS)/scripts/init-premount/mandos \
412
449
                $(MANDIR)/man8/splashy.8mandos.gz \
413
450
                $(MANDIR)/man8/askpass-fifo.8mandos.gz \
414
451
                $(MANDIR)/man8/plymouth.8mandos.gz \
415
 
        -rmdir $(PREFIX)/lib/mandos/plugins.d $(CONFDIR)/plugins.d \
416
 
                 $(PREFIX)/lib/mandos $(CONFDIR) $(KEYDIR)
 
452
        -rmdir $(LIBDIR)/mandos/plugins.d $(CONFDIR)/plugins.d \
 
453
                 $(LIBDIR)/mandos $(CONFDIR) $(KEYDIR)
417
454
        update-initramfs -k all -u
418
455
 
419
456
purge: purge-server purge-client
423
460
                $(DESTDIR)/etc/dbus-1/system.d/mandos.conf
424
461
                $(DESTDIR)/etc/default/mandos \
425
462
                $(DESTDIR)/etc/init.d/mandos \
 
463
                $(SYSTEMD)/mandos.service \
 
464
                $(DESTDIR)/run/mandos.pid \
426
465
                $(DESTDIR)/var/run/mandos.pid
427
466
        -rmdir $(CONFDIR)
428
467