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  • Committer: Teddy Hogeborn
  • Date: 2015-03-10 18:52:09 UTC
  • mto: (237.7.304 trunk)
  • mto: This revision was merged to the branch mainline in revision 325.
  • Revision ID: teddy@recompile.se-20150310185209-lxuovbu09zwyk9bx
Automatically determine the number of DH bits in the TLS handshake.

Instead of using a default value of 1024, check the OpenPGP key and
determine an appropriate number of DH bits to use, (using GnuTLS
functions made for this).  Document this new default behavior.

* plugins.d/mandos-client.c (safe_string): New function.
  (init_gnutls_global): If not specified, determine the number of DH
                        bits to use, based on the OpenPGP key.
* plugins.d/mandos-client.xml (OPTIONS): Document this new default of
                                         the --dh-bits option.

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

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Makefile
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        -Wmissing-format-attribute -Wnormalized=nfc -Wpacked \
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        -Wredundant-decls -Wnested-externs -Winline -Wvla \
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        -Wvolatile-register-var -Woverlength-strings
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#DEBUG=-ggdb3 -fsanitize=address 
 
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#DEBUG=-ggdb3
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# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
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# and <https://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
 
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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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# <https://developerblog.redhat.com/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/>
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ALL_SANITIZE_OPTIONS:=-fsanitize=leak -fsanitize=undefined \
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        -fsanitize=shift -fsanitize=integer-divide-by-zero \
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        -fsanitize=unreachable -fsanitize=vla-bound -fsanitize=null \
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        -fsanitize=return -fsanitize=signed-integer-overflow \
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        -fsanitize=bounds -fsanitize=alignment \
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        -fsanitize=object-size -fsanitize=float-divide-by-zero \
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        -fsanitize=float-cast-overflow -fsanitize=nonnull-attribute \
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        -fsanitize=returns-nonnull-attribute -fsanitize=bool \
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        -fsanitize=enum
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# Check which sanitizing options can be used
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SANITIZE:=$(foreach option,$(ALL_SANITIZE_OPTIONS),$(shell \
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        echo 'int main(){}' | $(CC) --language=c $(option) /dev/stdin \
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        -o /dev/null >/dev/null 2>&1 && echo $(option)))
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LINK_FORTIFY_LD=-z relro -z now
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LINK_FORTIFY=
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endif
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#COVERAGE=--coverage
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OPTIMIZE=-Os -fno-strict-aliasing
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LANGUAGE=-std=gnu11
 
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LANGUAGE=-std=gnu99
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htmldir=man
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version=1.7.13
 
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version=1.6.9
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SED=sed
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USER=$(firstword $(subst :, ,$(shell getent passwd _mandos || getent passwd nobody || echo 65534)))
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GROUP=$(firstword $(subst :, ,$(shell getent group _mandos || getent group nogroup || echo 65534)))
 
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GROUP=$(firstword $(subst :, ,$(shell getent group _mandos || getent group nobody || echo 65534)))
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## Use these settings for a traditional /usr/local install
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# PREFIX=$(DESTDIR)/usr/local
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##
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SYSTEMD=$(DESTDIR)$(shell pkg-config systemd --variable=systemdsystemunitdir)
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TMPFILES=$(DESTDIR)$(shell pkg-config systemd --variable=tmpfilesdir)
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GNUTLS_CFLAGS=$(shell pkg-config --cflags-only-I gnutls)
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GNUTLS_LIBS=$(shell pkg-config --libs gnutls)
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GPGME_CFLAGS=$(shell gpgme-config --cflags; getconf LFS_CFLAGS)
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GPGME_LIBS=$(shell gpgme-config --libs; getconf LFS_LIBS; \
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        getconf LFS_LDFLAGS)
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LIBNL3_CFLAGS=$(shell pkg-config --cflags-only-I libnl-route-3.0)
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LIBNL3_LIBS=$(shell pkg-config --libs libnl-route-3.0)
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# Do not change these two
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CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(SANITIZE) $(COVERAGE) \
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        $(OPTIMIZE) $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) \
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        $(GPGME_CFLAGS) -DVERSION='"$(version)"'
 
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CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) $(OPTIMIZE) \
 
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        $(LANGUAGE) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) \
 
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        -DVERSION='"$(version)"'
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LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
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# Commands to format a DocBook <refentry> document into a manual page
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PLUGINS=plugins.d/password-prompt plugins.d/mandos-client \
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        plugins.d/usplash plugins.d/splashy plugins.d/askpass-fifo \
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        plugins.d/plymouth
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PLUGIN_HELPERS=plugin-helpers/mandos-client-iprouteadddel
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CPROGS=plugin-runner $(PLUGINS) $(PLUGIN_HELPERS)
 
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CPROGS=plugin-runner $(PLUGINS)
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PROGS=mandos mandos-keygen mandos-ctl mandos-monitor $(CPROGS)
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DOCS=mandos.8 mandos-keygen.8 mandos-monitor.8 mandos-ctl.8 \
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        mandos.conf.5 mandos-clients.conf.5 plugin-runner.8mandos \
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        $(LINK.c) $^ -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
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                ) $(GPGME_LIBS) $(LOADLIBES) $(LDLIBS) -o $@
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plugin-helpers/mandos-client-iprouteadddel: plugin-helpers/mandos-client-iprouteadddel.c
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        $(LINK.c) $(LIBNL3_CFLAGS) $^ $(LIBNL3_LIBS) $(strip\
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                ) $(LOADLIBES) $(LDLIBS) -o $@
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.PHONY : all doc html clean distclean mostlyclean maintainer-clean \
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        check run-client run-server install install-html \
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        install-server install-client-nokey install-client uninstall \
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        @echo "###################################################################"
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# We set GNOME_KEYRING_CONTROL to block pam_gnome_keyring
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        ./plugin-runner --plugin-dir=plugins.d \
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                --plugin-helper-dir=plugin-helpers \
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                --config-file=plugin-runner.conf \
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                --options-for=mandos-client:--seckey=keydir/seckey.txt,--pubkey=keydir/pubkey.txt,--network-hook-dir=network-hooks.d \
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                --env-for=mandos-client:GNOME_KEYRING_CONTROL= \
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        elif install --directory --mode=u=rwx $(STATEDIR); then \
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                chown -- $(USER):$(GROUP) $(STATEDIR) || :; \
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        fi
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        if [ "$(TMPFILES)" != "$(DESTDIR)" -a -d "$(TMPFILES)" ]; then \
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                install --mode=u=rw,go=r tmpfiles.d-mandos.conf \
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                        $(TMPFILES)/mandos.conf; \
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        fi
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        install --mode=u=rwx,go=rx mandos $(PREFIX)/sbin/mandos
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        install --mode=u=rwx,go=rx --target-directory=$(PREFIX)/sbin \
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                mandos-ctl
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install-client-nokey: all doc
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        install --directory $(LIBDIR)/mandos $(CONFDIR)
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        install --directory --mode=u=rwx $(KEYDIR) \
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                $(LIBDIR)/mandos/plugins.d \
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                $(LIBDIR)/mandos/plugin-helpers
 
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                $(LIBDIR)/mandos/plugins.d
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        if [ "$(CONFDIR)" != "$(LIBDIR)/mandos" ]; then \
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                install --mode=u=rwx \
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                        --directory "$(CONFDIR)/plugins.d" \
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                        "$(CONFDIR)/plugin-helpers"; \
 
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                        --directory "$(CONFDIR)/plugins.d"; \
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        fi
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        install --mode=u=rwx,go=rx --directory \
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                "$(CONFDIR)/network-hooks.d"
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        install --mode=u=rwxs,go=rx \
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                --target-directory=$(LIBDIR)/mandos/plugins.d \
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                plugins.d/plymouth
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        install --mode=u=rwx,go=rx \
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                --target-directory=$(LIBDIR)/mandos/plugin-helpers \
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                plugin-helpers/mandos-client-iprouteadddel
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        install initramfs-tools-hook \
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                $(INITRAMFSTOOLS)/hooks/mandos
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        install --mode=u=rw,go=r initramfs-tools-hook-conf \