#!/bin/sh
set -e

TESTDIR="$(readlink -f "$(dirname "$0")")"
. "$TESTDIR/framework"

setupenvironment
configarchitecture "i386"

export APT_DONT_SIGN='Release.gpg'
buildaptarchive
setupflataptarchive
changetowebserver

prepare() {
	local DATE="${2:-now}"
	if [ "$DATE" = 'now' ]; then
		if [ "$1" = "${PKGFILE}-new" ]; then
			DATE='now - 1 day'
		else
			DATE='now - 7 day'
		fi
	fi
	for release in $(find rootdir/var/lib/apt/lists 2> /dev/null); do
		touch -d 'now - 1 year' "$release"
	done
	aptget clean
	cp "$1" aptarchive/Packages
	find aptarchive -name 'Release' -delete
	compressfile 'aptarchive/Packages' "$DATE"
	generatereleasefiles "$DATE" 'now + 1 month'
}

installaptold() {
	rm -rf rootdir/var/cache/apt/archives
	testsuccessequal "Reading package lists...
Building dependency tree...
Suggested packages:
  aptitude | synaptic | wajig dpkg-dev apt-doc bzip2 lzma python-apt
The following NEW packages will be installed:
  apt
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
After this operation, 5370 kB of additional disk space will be used.
Get:1 http://localhost:${APTHTTPPORT}  apt 0.7.25.3
Download complete and in download only mode" aptget install apt -dy
}

installaptnew() {
	rm -rf rootdir/var/cache/apt/archives
	testsuccessequal "Reading package lists...
Building dependency tree...
Suggested packages:
  aptitude | synaptic | wajig dpkg-dev apt-doc bzip2 lzma python-apt
The following NEW packages will be installed:
  apt
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
After this operation, 5808 kB of additional disk space will be used.
Get:1 http://localhost:${APTHTTPPORT}  apt 0.8.0~pre1
Download complete and in download only mode" aptget install apt -dy
}

failaptold() {
	testfailureequal 'Reading package lists...
Building dependency tree...
Suggested packages:
  aptitude | synaptic | wajig dpkg-dev apt-doc bzip2 lzma python-apt
The following NEW packages will be installed:
  apt
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
After this operation, 5370 kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  apt
E: There were unauthenticated packages and -y was used without --allow-unauthenticated' aptget install apt -dy
}

failaptnew() {
	testfailureequal 'Reading package lists...
Building dependency tree...
Suggested packages:
  aptitude | synaptic | wajig dpkg-dev apt-doc bzip2 lzma python-apt
The following NEW packages will be installed:
  apt
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
After this operation, 5808 kB of additional disk space will be used.
WARNING: The following packages cannot be authenticated!
  apt
E: There were unauthenticated packages and -y was used without --allow-unauthenticated' aptget install apt -dy
}

# fake our downloadable file
touch aptarchive/apt.deb

PKGFILE="${TESTDIR}/$(echo "$(basename "$0")" | sed 's#^test-#Packages-#')"

updatewithwarnings() {
	testwarning aptget update -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
	testsuccess grep -E "$1" rootdir/tmp/testwarning.output
}

runtest() {
	msgmsg 'Cold archive signed by' 'Joe Sixpack'
	prepare "${PKGFILE}"
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Joe Sixpack'
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	if [ "$(id -u)" != '0' ]; then
		msgmsg 'Cold archive signed by' 'Joe Sixpack + unreadable key'
		rm -rf rootdir/var/lib/apt/lists
		echo 'foobar' > rootdir/etc/apt/trusted.gpg.d/unreadablekey.gpg
		chmod 000 rootdir/etc/apt/trusted.gpg.d/unreadablekey.gpg
		updatewithwarnings '^W: .* is not readable by user'
		chmod 644 rootdir/etc/apt/trusted.gpg.d/unreadablekey.gpg
		rm -f rootdir/etc/apt/trusted.gpg.d/unreadablekey.gpg
		testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
		installaptold
	fi

	msgmsg 'Good warm archive signed by' 'Joe Sixpack'
	prepare "${PKGFILE}-new"
	signreleasefiles 'Joe Sixpack'
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt
	installaptnew

	msgmsg 'Cold archive signed by' 'Rex Expired'
	prepare "${PKGFILE}"
	rm -rf rootdir/var/lib/apt/lists
	cp keys/rexexpired.pub rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg
	signreleasefiles 'Rex Expired'
	updatewithwarnings '^W: .* EXPKEYSIG'
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	failaptold
	rm -f rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg

	msgmsg 'Cold archive expired signed by' 'Joe Sixpack'
	if dpkg --compare-versions "$(aptkey adv --version | head -n 2 | tail -n 1 | cut -d' ' -f 3)" '>=' '2.1' >/dev/null 2>&1; then
		touch rootdir/etc/apt/apt.conf.d/99gnupg2
	elif gpg2 --version >/dev/null 2>&1; then
		echo 'Apt::Key::gpgcommand "gpg2";' > rootdir/etc/apt/apt.conf.d/99gnupg2
		if ! dpkg --compare-versions "$(aptkey adv --version | head -n 2 | tail -n 1 | cut -d' ' -f 3)" '>=' '2.1' >/dev/null 2>&1; then
			rm rootdir/etc/apt/apt.conf.d/99gnupg2
		fi
	fi
	if [ -e rootdir/etc/apt/apt.conf.d/99gnupg2 ]; then
		prepare "${PKGFILE}"
		rm -rf rootdir/var/lib/apt/lists
		signreleasefiles 'Joe Sixpack' 'aptarchive' --faked-system-time "20070924T154812" --default-sig-expire 2016-04-01
		updatewithwarnings '^W: .* EXPSIG'
		testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
		failaptold
		rm -f rootdir/etc/apt/apt.conf.d/99gnupg2
	else
		msgskip 'Not a new enough gpg available providing --fake-system-time'
	fi

	msgmsg 'Cold archive signed by' 'Joe Sixpack,Marvin Paranoid'
	prepare "${PKGFILE}"
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Joe Sixpack,Marvin Paranoid'
	successfulaptgetupdate 'NO_PUBKEY'
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	msgmsg 'Cold archive signed by' 'Joe Sixpack,Rex Expired'
	prepare "${PKGFILE}"
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Joe Sixpack,Rex Expired'
	cp keys/rexexpired.pub rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg
	successfulaptgetupdate 'EXPKEYSIG'
	rm -f rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	msgmsg 'Cold archive signed by' 'Marvin Paranoid'
	prepare "${PKGFILE}"
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Marvin Paranoid'
	updatewithwarnings '^W: .* NO_PUBKEY'
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	failaptold

	msgmsg 'Bad warm archive signed by' 'Joe Sixpack'
	prepare "${PKGFILE}-new"
	signreleasefiles 'Joe Sixpack'
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt
	installaptnew

	msgmsg 'Cold archive signed by' 'Joe Sixpack'
	prepare "${PKGFILE}"
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Joe Sixpack'
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	msgmsg 'Good warm archive signed by' 'Marvin Paranoid'
	prepare "${PKGFILE}-new"
	signreleasefiles 'Marvin Paranoid'
	updatewithwarnings '^W: .* NO_PUBKEY'
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	msgmsg 'Good warm archive signed by' 'Rex Expired'
	prepare "${PKGFILE}-new"
	cp keys/rexexpired.pub rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg
	signreleasefiles 'Rex Expired'
	updatewithwarnings '^W: .* EXPKEYSIG'
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold
	rm rootdir/etc/apt/trusted.gpg.d/rexexpired.gpg

	msgmsg 'Good warm archive signed by' 'Joe Sixpack'
	prepare "${PKGFILE}-new"
	signreleasefiles
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt
	installaptnew

	msgmsg 'Cold archive signed by good keyring' 'Marvin Paranoid'
	prepare "${PKGFILE}"
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Marvin Paranoid'
	local MARVIN="$(readlink -f keys/marvinparanoid.pub)"
	sed -i "s#^\(deb\(-src\)\?\) #\1 [signed-by=$MARVIN] #" rootdir/etc/apt/sources.list.d/*
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	msgmsg 'Cold archive signed by bad keyring' 'Joe Sixpack'
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Joe Sixpack'
	updatewithwarnings '^W: .* NO_PUBKEY'
	sed -i "s#^\(deb\(-src\)\?\) \[signed-by=$MARVIN\] #\1 #" rootdir/etc/apt/sources.list.d/*

	local MARVIN="$(aptkey --keyring $MARVIN finger --with-colons | grep '^fpr' | cut -d':' -f 10)"
	msgmsg 'Cold archive signed by bad keyid' 'Joe Sixpack'
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Joe Sixpack'
	sed -i "s#^\(deb\(-src\)\?\) #\1 [signed-by=$MARVIN] #" rootdir/etc/apt/sources.list.d/*
	updatewithwarnings '^W: .* be verified because the public key is not available: .*'

	msgmsg 'Cold archive signed by good keyid' 'Marvin Paranoid'
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Marvin Paranoid'
	cp keys/marvinparanoid.pub rootdir/etc/apt/trusted.gpg.d/marvinparanoid.gpg
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	msgmsg 'Cold archive signed by good keyid' 'Marvin Paranoid,Joe Sixpack'
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Marvin Paranoid,Joe Sixpack'
	successfulaptgetupdate 'NoPubKey: GOODSIG'
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	local SIXPACK="$(aptkey --keyring keys/joesixpack.pub finger --with-colons | grep '^fpr' | cut -d':' -f 10)"
	msgmsg 'Cold archive signed by good keyids' 'Joe Sixpack'
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Joe Sixpack'
	sed -i "s#^\(deb\(-src\)\?\) \[signed-by=$MARVIN\] #\1 [signed-by=${SIXPACK},${MARVIN}] #" rootdir/etc/apt/sources.list.d/*
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	msgmsg 'Cold archive signed by good keyids' 'Joe Sixpack'
	rm -rf rootdir/var/lib/apt/lists
	sed -i "s#^\(deb\(-src\)\?\) \[signed-by=${SIXPACK},${MARVIN}\] #\1 [signed-by=${MARVIN},${SIXPACK}] #" rootdir/etc/apt/sources.list.d/*
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold
	rm -f rootdir/etc/apt/trusted.gpg.d/marvinparanoid.gpg
	sed -i "s#^\(deb\(-src\)\?\) \[signed-by=${MARVIN},${SIXPACK}\] #\1 #" rootdir/etc/apt/sources.list.d/*

	rm -rf rootdir/var/lib/apt/lists-bak
	cp -a rootdir/var/lib/apt/lists rootdir/var/lib/apt/lists-bak
	prepare "${PKGFILE}-new"
	signreleasefiles 'Joe Sixpack'

	msgmsg 'Warm archive with signed-by' 'Joe Sixpack'
	sed -i "/^Valid-Until: / a\
Signed-By: ${SIXPACK}" rootdir/var/lib/apt/lists/*Release
	touch -d 'now - 1 year' rootdir/var/lib/apt/lists/*Release
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt
	installaptnew

	msgmsg 'Warm archive with signed-by' 'Marvin Paranoid'
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	sed -i "/^Valid-Until: / a\
Signed-By: ${MARVIN}" rootdir/var/lib/apt/lists/*Release
	touch -d 'now - 1 year' rootdir/var/lib/apt/lists/*Release
	updatewithwarnings 'W: .* public key is not available: GOODSIG'
	testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
	installaptold

	msgmsg 'Warm archive with outdated signed-by' 'Marvin Paranoid'
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	sed -i "/^Valid-Until: / a\
Valid-Until: $(date -u -d "now - 2min" '+%a, %d %b %Y %H:%M:%S %Z') \\
Signed-By: ${MARVIN}" rootdir/var/lib/apt/lists/*Release
	touch -d 'now - 1 year' rootdir/var/lib/apt/lists/*Release
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt
	installaptnew

	msgmsg 'Warm archive with two signed-bys' 'Joe Sixpack'
	rm -rf rootdir/var/lib/apt/lists
	cp -a rootdir/var/lib/apt/lists-bak rootdir/var/lib/apt/lists
	sed -i "/^Valid-Until: / a\
Signed-By: ${MARVIN} ${MARVIN}, \\
 ${SIXPACK}" rootdir/var/lib/apt/lists/*Release
	touch -d 'now - 1 year' rootdir/var/lib/apt/lists/*Release
	successfulaptgetupdate
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt
	installaptnew
}

runtest2() {
	msgmsg 'Cold archive signed by' 'Joe Sixpack'
	prepare "${PKGFILE}"
	rm -rf rootdir/var/lib/apt/lists
	signreleasefiles 'Joe Sixpack'
	successfulaptgetupdate

	# New .deb but now an unsigned archive. For example MITM to circumvent
	# package verification.
	msgmsg 'Warm archive signed by' 'nobody'
	prepare "${PKGFILE}-new"
	find aptarchive/ \( -name InRelease -o -name Release.gpg \) -delete
	updatewithwarnings 'W: .* no longer signed.'
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt
	failaptnew

	# Unsigned archive from the beginning must also be detected.
	msgmsg 'Cold archive signed by' 'nobody'
	rm -rf rootdir/var/lib/apt/lists
	updatewithwarnings 'W: .* is not signed.'
	testsuccessequal "$(cat "${PKGFILE}-new")
" aptcache show apt
	failaptnew
}

runtest3() {
	echo "APT::Hashes::$APT_TESTS_DIGEST_ALGO::$1 \"yes\";" > rootdir/etc/apt/apt.conf.d/truststate
	msgmsg "Running base test with $1 digest"
	runtest2

	for DELETEFILE in 'InRelease' 'Release.gpg'; do
		export APT_DONT_SIGN="$DELETEFILE"
		msgmsg "Running test with deletion of $DELETEFILE and $1 digest"
		runtest
		export APT_DONT_SIGN='Release.gpg'
	done
}

# disable some protection by default and ensure we still do the verification
# correctly
cat > rootdir/etc/apt/apt.conf.d/weaken-security <<EOF
Acquire::AllowInsecureRepositories "1";
Acquire::AllowDowngradeToInsecureRepositories "1";
EOF
# the hash marked as configurable in our gpgv method
export APT_TESTS_DIGEST_ALGO='SHA224'

successfulaptgetupdate() {
	testsuccess aptget update -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
	if [ -n "$1" ]; then
		cp rootdir/tmp/testsuccess.output aptupdate.output
		testsuccess grep "$1" aptupdate.output
	fi
}
runtest3 'Trusted'

successfulaptgetupdate() {
	testwarning aptget update -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
	if [ -n "$1" ]; then
		testsuccess grep "$1" rootdir/tmp/testwarning.output
	fi
	testsuccess grep 'uses weak digest algorithm' rootdir/tmp/testwarning.output
}
runtest3 'Weak'

msgmsg "Running test with apt-untrusted digest"
echo "APT::Hashes::$APT_TESTS_DIGEST_ALGO::Untrusted \"yes\";" > rootdir/etc/apt/apt.conf.d/truststate
runfailure() {
	for DELETEFILE in 'InRelease' 'Release.gpg'; do
		export APT_DONT_SIGN="$DELETEFILE"
		msgmsg 'Cold archive signed by' 'Joe Sixpack'
		prepare "${PKGFILE}"
		rm -rf rootdir/var/lib/apt/lists
		signreleasefiles 'Joe Sixpack'
		testfailure aptget update --no-allow-insecure-repositories -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
		testsuccess grep 'The following signatures were invalid' rootdir/tmp/testfailure.output
		testnopackage 'apt'
		testwarning aptget update --allow-insecure-repositories -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
		failaptold
		rm -rf rootdir/var/lib/apt/lists
		sed -i 's#^deb\(-src\)\? #deb\1 [allow-insecure=yes] #' rootdir/etc/apt/sources.list.d/*
		testwarning aptget update --no-allow-insecure-repositories -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
		failaptold
		sed -i 's#^deb\(-src\)\? \[allow-insecure=yes\] #deb\1 #' rootdir/etc/apt/sources.list.d/*

		msgmsg 'Cold archive signed by' 'Marvin Paranoid'
		prepare "${PKGFILE}"
		rm -rf rootdir/var/lib/apt/lists
		signreleasefiles 'Marvin Paranoid'
		testfailure aptget update --no-allow-insecure-repositories -o Debug::pkgAcquire::Worker=1 -o Debug::Acquire::gpgv=1
		testnopackage 'apt'
		updatewithwarnings '^W: .* NO_PUBKEY'
		testsuccessequal "$(cat "${PKGFILE}")
" aptcache show apt
		failaptold
		export APT_DONT_SIGN='Release.gpg'
	done
}
runfailure

msgmsg "Running test with gpgv-untrusted digest"
export APT_TESTS_DIGEST_ALGO='MD5'
runfailure