view debian/rules @ 1930:299f4f19ba19

Add /usr/sbin and /sbin to default root PATH When dropbear is used in a very restricted environment (such as in a initrd), the default user shell is often also very restricted and doesn't take care of setting the PATH so the user ends up with the PATH set by dropbear. Unfortunately, dropbear always sets "/usr/bin:/bin" as default PATH even for the root user which should have /usr/sbin and /sbin too. For a concrete instance of this problem, see the "Remote Unlocking" section in this tutorial: https://paxswill.com/blog/2013/11/04/encrypted-raspberry-pi/ It speaks of a bug in the initramfs script because it's written "blkid" instead of "/sbin/blkid"... this is just because the scripts from the initramfs do not expect to have a PATH without the sbin directories and because dropbear is not setting the PATH appropriately for the root user. I'm thus suggesting to use the attached patch to fix this misbehaviour (I did not test it, but it's easy enough). It might seem anecdotic but multiple Kali users have been bitten by this. From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903403
author Raphael Hertzog <hertzog@debian.org>
date Mon, 09 Jul 2018 16:27:53 +0200
parents 7b68e581985f
children
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#!/usr/bin/make -f

export DEB_BUILD_MAINT_OPTIONS = hardening=+all
DPKG_EXPORT_BUILDFLAGS = 1
include /usr/share/dpkg/buildflags.mk

#export DH_OPTIONS
DEB_HOST_GNU_TYPE ?=$(shell dpkg-architecture -qDEB_HOST_GNU_TYPE)
DEB_BUILD_GNU_TYPE ?=$(shell dpkg-architecture -qDEB_BUILD_GNU_TYPE)

STRIP =strip
ifneq (,$(findstring nostrip,$(DEB_BUILD_OPTIONS)))
  STRIP =: nostrip
endif

CONFFLAGS =
CC =gcc
ifneq (,$(findstring diet,$(DEB_BUILD_OPTIONS)))
  CONFFLAGS =--disable-zlib
  CC =diet -v -Os gcc -nostdinc
endif

DIR =$(shell pwd)/debian/dropbear

patch: deb-checkdir patch-stamp
patch-stamp:
	for i in `ls -1 debian/diff/*.diff || :`; do \
	  patch -p1 <$$i || exit 1; \
	done
	touch patch-stamp

config.status: patch-stamp configure
	CC='$(CC)' \
	CFLAGS='$(CFLAGS)'' -DSFTPSERVER_PATH="\"/usr/lib/sftp-server\""' \
	  ./configure --host='$(DEB_HOST_GNU_TYPE)' \
	    --build='$(DEB_BUILD_GNU_TYPE)' --prefix=/usr \
	    --mandir=\$${prefix}/share/man --infodir=\$${prefix}/share/info \
	    $(CONFFLAGS)

build: deb-checkdir build-stamp
build-stamp: config.status
	$(MAKE) CC='$(CC)' LD='$(CC)'
	touch build-stamp

clean: deb-checkdir deb-checkuid
	test ! -r Makefile || $(MAKE) distclean
	rm -f libtomcrypt/Makefile libtommath/Makefile
	test ! -e patch-stamp || \
	  for i in `ls -1r debian/diff/*.diff || :`; do \
	    patch -p1 -R <$$i; \
	  done
	rm -f patch-stamp build-stamp config.log config.status
	rm -rf '$(DIR)'
	rm -f debian/files debian/substvars debian/copyright changelog

install: deb-checkdir deb-checkuid build-stamp
	rm -rf '$(DIR)'
	install -d -m0755 '$(DIR)'/etc/dropbear
	# programs
	install -d -m0755 '$(DIR)'/usr/sbin
	install -m0755 dropbear '$(DIR)'/usr/sbin/dropbear
	install -d -m0755 '$(DIR)'/usr/bin
	install -m0755 dbclient '$(DIR)'/usr/bin/dbclient
	install -m0755 dropbearkey '$(DIR)'/usr/bin/dropbearkey
	install -d -m0755 '$(DIR)'/usr/lib/dropbear
	install -m0755 dropbearconvert \
	  '$(DIR)'/usr/lib/dropbear/dropbearconvert
	$(STRIP) -R .comment -R .note '$(DIR)'/usr/sbin/* \
	  '$(DIR)'/usr/bin/* '$(DIR)'/usr/lib/dropbear/*
	# init and run scripts
	install -d -m0755 '$(DIR)'/etc/init.d
	install -m0755 debian/dropbear.init '$(DIR)'/etc/init.d/dropbear
	install -m0755 debian/service/run '$(DIR)'/etc/dropbear/run
	install -d -m0755 '$(DIR)'/etc/dropbear/log
	install -m0755 debian/service/log '$(DIR)'/etc/dropbear/log/run
	ln -s /var/log/dropbear '$(DIR)'/etc/dropbear/log/main
	# man pages
	install -d -m0755 '$(DIR)'/usr/share/man/man8
	install -d -m0755 '$(DIR)'/usr/share/man/man1
	install -m644 dropbear.8 '$(DIR)'/usr/share/man/man8/
	for i in dbclient.1 dropbearkey.1 dropbearconvert.1; do \
	  install -m644 $$i '$(DIR)'/usr/share/man/man1/ || exit 1; \
	done
	gzip -9 '$(DIR)'/usr/share/man/man8/*.8
	gzip -9 '$(DIR)'/usr/share/man/man1/*.1
	# copyright, changelog
	cat debian/copyright.in LICENSE >debian/copyright
	test -r changelog || ln -s CHANGES changelog

binary-indep:

binary-arch: install dropbear.deb
	test '$(CC)' != 'gcc' || \
	  dpkg-shlibdeps '$(DIR)'/usr/sbin/* '$(DIR)'/usr/bin/* \
	    '$(DIR)'/usr/lib/dropbear/*
	dpkg-gencontrol -isp -pdropbear -P'$(DIR)'
	dpkg -b '$(DIR)' ..

binary: binary-arch binary-indep

.PHONY: patch build clean install binary-indep binary-arch binary

include debian/implicit