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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 \
 
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        -Wvolatile-register-var -Woverlength-strings
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#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
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# and <http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
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FORTIFY=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
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LINK_FORTIFY_LD=-z relro -z now
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LINK_FORTIFY += -pie
21
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endif
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#COVERAGE=--coverage
23
 
OPTIMIZE=-Os
 
26
OPTIMIZE=-Os -fno-strict-aliasing
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LANGUAGE=-std=gnu99
25
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htmldir=man
26
 
version=1.4.1
 
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version=1.6.9
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SED=sed
28
31
 
29
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USER=$(firstword $(subst :, ,$(shell getent passwd _mandos || getent passwd nobody || echo 65534)))
36
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# MANDIR=$(PREFIX)/man
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# INITRAMFSTOOLS=$(DESTDIR)/etc/initramfs-tools
38
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# STATEDIR=$(DESTDIR)/var/lib/mandos
 
42
# LIBDIR=$(PREFIX)/lib
39
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##
40
44
 
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## These settings are for a package-type install
45
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MANDIR=$(PREFIX)/share/man
46
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INITRAMFSTOOLS=$(DESTDIR)/usr/share/initramfs-tools
47
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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 \
 
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                        echo "$(DESTDIR)$$d"; \
 
58
                        break; \
 
59
                fi; \
 
60
        done)
48
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##
49
62
 
 
63
SYSTEMD=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
 
64
 
50
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GNUTLS_CFLAGS=$(shell pkg-config --cflags-only-I gnutls)
51
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GNUTLS_LIBS=$(shell pkg-config --libs gnutls)
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AVAHI_CFLAGS=$(shell pkg-config --cflags-only-I avahi-core)
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        getconf LFS_LDFLAGS)
57
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58
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# Do not change these two
59
 
CFLAGS=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) $(OPTIMIZE) \
 
74
CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) $(OPTIMIZE) \
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        $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) \
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        -DVERSION='"$(version)"'
62
 
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 $(flag))
63
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# Commands to format a DocBook <refentry> document into a manual page
65
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DOCBOOKTOMAN=$(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 \
71
 
         /usr/share/xml/docbook/stylesheet/nwalsh/manpages/docbook.xsl \
 
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        /usr/share/xml/docbook/stylesheet/nwalsh/manpages/docbook.xsl \
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        $(notdir $<); \
73
 
        $(MANPOST) $(notdir $@);\
74
 
        LANG=en_US.UTF-8 MANWIDTH=80 man --warnings --encoding=UTF-8 \
75
 
        --local-file $(notdir $@) >/dev/null)
76
 
# DocBook-to-man post-processing to fix a '\n' escape bug
77
 
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)
78
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79
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DOCBOOKTOHTML=$(strip xsltproc --nonet --xinclude \
80
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        --param make.year.ranges                1 \
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        $(LINK.c) $^ -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
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                ) $(GPGME_LIBS) $(LOADLIBES) $(LDLIBS) -o $@
227
241
 
228
 
.PHONY : all doc html clean distclean run-client run-server install \
229
 
        install-server install-client uninstall uninstall-server \
230
 
        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
231
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232
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clean:
233
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        -rm --force $(CPROGS) $(objects) $(htmldocs) $(DOCS) core
239
255
 
240
256
check:  all
241
257
        ./mandos --check
 
258
        ./mandos-ctl --check
242
259
 
243
260
# Run the client with a local config and key
244
261
run-client: all keydir/seckey.txt keydir/pubkey.txt
247
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        @echo "# ignored.  The messages are caused by not running as root, but   #"
248
265
        @echo "# you should NOT run \"make run-client\" as root unless you also    #"
249
266
        @echo "# unpacked and compiled Mandos as root, which is NOT recommended. #"
250
 
        @echo "# From plugin-runner: setuid: Operation not permitted             #"
 
267
        @echo "# From plugin-runner: setgid: Operation not permitted             #"
 
268
        @echo "#                     setuid: Operation not permitted             #"
251
269
        @echo "# From askpass-fifo:  mkfifo: Permission denied                   #"
252
 
        @echo "# From mandos-client: setuid: Operation not permitted             #"
253
 
        @echo "#                     seteuid: Operation not permitted            #"
254
 
        @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 *      #"
255
273
        @echo "###################################################################"
 
274
# We set GNOME_KEYRING_CONTROL to block pam_gnome_keyring
256
275
        ./plugin-runner --plugin-dir=plugins.d \
257
276
                --config-file=plugin-runner.conf \
258
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= \
259
279
                $(CLIENTARGS)
260
280
 
261
281
# Used by run-client
264
284
        ./mandos-keygen --dir keydir --force
265
285
 
266
286
# Run the server with a local config
267
 
run-server: confdir/mandos.conf confdir/clients.conf
 
287
run-server: confdir/mandos.conf confdir/clients.conf statedir
268
288
        ./mandos --debug --no-dbus --configdir=confdir \
269
289
                --statedir=statedir $(SERVERARGS)
270
290
 
276
296
        install --directory confdir
277
297
        install --mode=u=rw $< $@
278
298
# Add a client password
279
 
        ./mandos-keygen --dir keydir --password >> $@
 
299
        ./mandos-keygen --dir keydir --password --no-ssh >> $@
280
300
statedir:
281
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        install --directory statedir
282
302
 
289
309
 
290
310
install-server: doc
291
311
        install --directory $(CONFDIR)
292
 
        install --directory --mode=u=rwx --owner=$(USER) \
293
 
                --group=$(GROUP) $(STATEDIR)
 
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
294
318
        install --mode=u=rwx,go=rx mandos $(PREFIX)/sbin/mandos
295
319
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
296
320
                mandos-ctl
304
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                $(DESTDIR)/etc/dbus-1/system.d/mandos.conf
305
329
        install --mode=u=rwx,go=rx init.d-mandos \
306
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
307
334
        install --mode=u=rw,go=r default-mandos \
308
335
                $(DESTDIR)/etc/default/mandos
309
336
        if [ -z $(DESTDIR) ]; then \
319
346
                > $(MANDIR)/man5/mandos.conf.5.gz
320
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        gzip --best --to-stdout mandos-clients.conf.5 \
321
348
                > $(MANDIR)/man5/mandos-clients.conf.5.gz
 
349
        gzip --best --to-stdout intro.8mandos \
 
350
                > $(MANDIR)/man8/intro.8mandos.gz
322
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323
352
install-client-nokey: all doc
324
 
        install --directory $(PREFIX)/lib/mandos $(CONFDIR)
 
353
        install --directory $(LIBDIR)/mandos $(CONFDIR)
325
354
        install --directory --mode=u=rwx $(KEYDIR) \
326
 
                $(PREFIX)/lib/mandos/plugins.d
327
 
        if [ "$(CONFDIR)" != "$(PREFIX)/lib/mandos" ]; then \
 
355
                $(LIBDIR)/mandos/plugins.d
 
356
        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
328
357
                install --mode=u=rwx \
329
358
                        --directory "$(CONFDIR)/plugins.d"; \
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        fi
331
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        install --mode=u=rwx,go=rx --directory \
332
361
                "$(CONFDIR)/network-hooks.d"
333
362
        install --mode=u=rwx,go=rx \
334
 
                --target-directory=$(PREFIX)/lib/mandos plugin-runner
 
363
                --target-directory=$(LIBDIR)/mandos plugin-runner
335
364
        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
336
365
                mandos-keygen
337
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        install --mode=u=rwx,go=rx \
338
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
367
                --target-directory=$(LIBDIR)/mandos/plugins.d \
339
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                plugins.d/password-prompt
340
369
        install --mode=u=rwxs,go=rx \
341
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
370
                --target-directory=$(LIBDIR)/mandos/plugins.d \
342
371
                plugins.d/mandos-client
343
372
        install --mode=u=rwxs,go=rx \
344
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
373
                --target-directory=$(LIBDIR)/mandos/plugins.d \
345
374
                plugins.d/usplash
346
375
        install --mode=u=rwxs,go=rx \
347
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
376
                --target-directory=$(LIBDIR)/mandos/plugins.d \
348
377
                plugins.d/splashy
349
378
        install --mode=u=rwxs,go=rx \
350
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
379
                --target-directory=$(LIBDIR)/mandos/plugins.d \
351
380
                plugins.d/askpass-fifo
352
381
        install --mode=u=rwxs,go=rx \
353
 
                --target-directory=$(PREFIX)/lib/mandos/plugins.d \
 
382
                --target-directory=$(LIBDIR)/mandos/plugins.d \
354
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                plugins.d/plymouth
355
384
        install initramfs-tools-hook \
356
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                $(INITRAMFSTOOLS)/hooks/mandos
402
431
        ! grep --regexp='^ *[^ #].*keyscript=[^,=]*/mandos/' \
403
432
                $(DESTDIR)/etc/crypttab
404
433
        -rm --force $(PREFIX)/sbin/mandos-keygen \
405
 
                $(PREFIX)/lib/mandos/plugin-runner \
406
 
                $(PREFIX)/lib/mandos/plugins.d/password-prompt \
407
 
                $(PREFIX)/lib/mandos/plugins.d/mandos-client \
408
 
                $(PREFIX)/lib/mandos/plugins.d/usplash \
409
 
                $(PREFIX)/lib/mandos/plugins.d/splashy \
410
 
                $(PREFIX)/lib/mandos/plugins.d/askpass-fifo \
411
 
                $(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 \
412
441
                $(INITRAMFSTOOLS)/hooks/mandos \
413
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                $(INITRAMFSTOOLS)/conf-hooks.d/mandos \
414
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                $(INITRAMFSTOOLS)/scripts/init-premount/mandos \
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                $(MANDIR)/man8/splashy.8mandos.gz \
421
450
                $(MANDIR)/man8/askpass-fifo.8mandos.gz \
422
451
                $(MANDIR)/man8/plymouth.8mandos.gz \
423
 
        -rmdir $(PREFIX)/lib/mandos/plugins.d $(CONFDIR)/plugins.d \
424
 
                 $(PREFIX)/lib/mandos $(CONFDIR) $(KEYDIR)
 
452
        -rmdir $(LIBDIR)/mandos/plugins.d $(CONFDIR)/plugins.d \
 
453
                 $(LIBDIR)/mandos $(CONFDIR) $(KEYDIR)
425
454
        update-initramfs -k all -u
426
455
 
427
456
purge: purge-server purge-client
431
460
                $(DESTDIR)/etc/dbus-1/system.d/mandos.conf
432
461
                $(DESTDIR)/etc/default/mandos \
433
462
                $(DESTDIR)/etc/init.d/mandos \
 
463
                $(SYSTEMD)/mandos.service \
 
464
                $(DESTDIR)/run/mandos.pid \
434
465
                $(DESTDIR)/var/run/mandos.pid
435
466
        -rmdir $(CONFDIR)
436
467