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#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -eux
set -o pipefail
# shellcheck source=test/units/util.sh
. "$(dirname "$0")"/util.sh
export SYSTEMD_LOG_LEVEL=debug
export PAGER=
SD_PCREXTEND="/usr/lib/systemd/systemd-pcrextend"
SD_PCRLOCK="/usr/lib/systemd/systemd-pcrlock"
if [[ ! -x "${SD_PCREXTEND:?}" ]] || [[ ! -x "${SD_PCRLOCK:?}" ]] ; then
echo "$SD_PCREXTEND or $SD_PCRLOCK not found, skipping pcrlock tests"
exit 0
fi
at_exit() {
if [[ $? -ne 0 ]]; then
# Dump the event log on fail, to make debugging a bit easier
[[ -e /run/log/systemd/tpm2-measure.log ]] && jq --seq --slurp </run/log/systemd/tpm2-measure.log
fi
return 0
}
trap at_exit EXIT
# Temporarily override sd-pcrextend's sanity checks
export SYSTEMD_FORCE_MEASURE=1
# The PCRs we are going to lock to. We exclude the various PCRs we touched
# above where no event log record was written, because we cannot analyze
# things without event log. We include debug PCR 16, see below.
PCRS="1+2+3+4+5+16"
# Remove the old measurement log, as it contains all kinds of nonsense from the
# previous test, which will fail our consistency checks. Removing the file also
# means we'll fail consistency check, but at least we'll fail them consistently
# (as the PCR values simply won't match the log).
rm -f /run/log/systemd/tpm2-measure.log
# Ensure a truncated log doesn't crash pcrlock
echo -n -e \\x1e >/tmp/borked
set +e
SYSTEMD_MEASURE_LOG_USERSPACE=/tmp/borked "$SD_PCRLOCK" cel --no-pager --json=pretty
ret=$?
set -e
# If it crashes the exit code will be 149
test $ret -eq 1
SYSTEMD_COLORS=256 "$SD_PCRLOCK"
"$SD_PCRLOCK" cel --no-pager --json=pretty
"$SD_PCRLOCK" log --pcr="$PCRS"
"$SD_PCRLOCK" log --json=pretty --pcr="$PCRS"
"$SD_PCRLOCK" list-components
"$SD_PCRLOCK" list-components --location=250-
"$SD_PCRLOCK" list-components --location=250-:350-
"$SD_PCRLOCK" lock-firmware-config
"$SD_PCRLOCK" lock-gpt
"$SD_PCRLOCK" lock-machine-id
"$SD_PCRLOCK" lock-file-system
"$SD_PCRLOCK" lock-file-system /
"$SD_PCRLOCK" predict --pcr="$PCRS"
"$SD_PCRLOCK" predict --pcr="0x1+0x3+4"
"$SD_PCRLOCK" predict --json=pretty --pcr="$PCRS"
SD_STUB="$(find /usr/lib/systemd/boot/efi/ -name "systemd-boot*.efi" | head -n1)"
if [[ -n "$SD_STUB" ]]; then
"$SD_PCRLOCK" lock-pe "$SD_STUB"
"$SD_PCRLOCK" lock-pe <"$SD_STUB"
"$SD_PCRLOCK" lock-uki "$SD_STUB"
"$SD_PCRLOCK" lock-uki <"$SD_STUB"
fi
PIN=huhu "$SD_PCRLOCK" make-policy --pcr="$PCRS" --recovery-pin=query
# Repeat immediately (this call will have to reuse the nvindex, rather than create it)
"$SD_PCRLOCK" make-policy --pcr="$PCRS"
"$SD_PCRLOCK" make-policy --pcr="$PCRS" --force
img="/tmp/pcrlock.img"
truncate -s 20M "$img"
echo -n hoho >/tmp/pcrlockpwd
chmod 0600 /tmp/pcrlockpwd
cryptsetup luksFormat -q --pbkdf pbkdf2 --pbkdf-force-iterations 1000 --use-urandom "$img" /tmp/pcrlockpwd
systemd-cryptenroll --unlock-key-file=/tmp/pcrlockpwd --tpm2-device=auto --tpm2-pcrlock=/var/lib/systemd/pcrlock.json --tpm2-public-key= --wipe-slot=tpm2 "$img"
systemd-cryptsetup attach pcrlock "$img" - tpm2-device=auto,tpm2-pcrlock=/var/lib/systemd/pcrlock.json,headless
systemd-cryptsetup detach pcrlock
# Measure something into PCR 16 (the "debug" PCR), which should make the activation fail
"$SD_PCREXTEND" --pcr=16 test70
"$SD_PCRLOCK" cel --json=pretty
(! systemd-cryptsetup attach pcrlock "$img" - tpm2-device=auto,tpm2-pcrlock=/var/lib/systemd/pcrlock.json,headless )
# Now add a component for it, rebuild policy and it should work (we'll rebuild
# once like that, but don't provide the recovery pin. This should fail, since
# the PCR is hosed after all. But then we'll use recovery pin, and it should
# work.
echo -n test70 | "$SD_PCRLOCK" lock-raw --pcrlock=/var/lib/pcrlock.d/910-test70.pcrlock --pcr=16
(! "$SD_PCRLOCK" make-policy --pcr="$PCRS")
PIN=huhu "$SD_PCRLOCK" make-policy --pcr="$PCRS" --recovery-pin=query
systemd-cryptsetup attach pcrlock "$img" - tpm2-device=auto,tpm2-pcrlock=/var/lib/systemd/pcrlock.json,headless
systemd-cryptsetup detach pcrlock
# And now let's do it the clean way, and generate the right policy ahead of time.
echo -n test70-take-two | "$SD_PCRLOCK" lock-raw --pcrlock=/var/lib/pcrlock.d/920-test70.pcrlock --pcr=16
"$SD_PCRLOCK" make-policy --pcr="$PCRS"
# the next one should be skipped because redundant
"$SD_PCRLOCK" make-policy --pcr="$PCRS"
# but this one should not be skipped, even if redundant, because we force it
"$SD_PCRLOCK" make-policy --pcr="$PCRS" --force --recovery-pin=show
"$SD_PCREXTEND" --pcr=16 test70-take-two
"$SD_PCRLOCK" cel --json=pretty
systemd-cryptsetup attach pcrlock "$img" - tpm2-device=auto,tpm2-pcrlock=/var/lib/systemd/pcrlock.json,headless
systemd-cryptsetup detach pcrlock
# Now use the root fs support, i.e. make the tool write a copy of the pcrlock
# file as service credential to some temporary dir and remove the local copy, so that
# it has to use the credential version.
mkdir /tmp/fakexbootldr
SYSTEMD_XBOOTLDR_PATH=/tmp/fakexbootldr SYSTEMD_RELAX_XBOOTLDR_CHECKS=1 "$SD_PCRLOCK" make-policy --pcr="$PCRS" --force
mv /var/lib/systemd/pcrlock.json /var/lib/systemd/pcrlock.json.gone
systemd-creds decrypt /tmp/fakexbootldr/loader/credentials/pcrlock.*.cred
SYSTEMD_ENCRYPTED_SYSTEM_CREDENTIALS_DIRECTORY=/tmp/fakexbootldr/loader/credentials systemd-cryptsetup attach pcrlock "$img" - tpm2-device=auto,headless
systemd-cryptsetup detach pcrlock
mv /var/lib/systemd/pcrlock.json.gone /var/lib/systemd/pcrlock.json
SYSTEMD_XBOOTLDR_PATH=/tmp/fakexbootldr SYSTEMD_RELAX_XBOOTLDR_CHECKS=1 "$SD_PCRLOCK" remove-policy
"$SD_PCRLOCK" unlock-firmware-config
"$SD_PCRLOCK" unlock-gpt
"$SD_PCRLOCK" unlock-machine-id
"$SD_PCRLOCK" unlock-file-system
"$SD_PCRLOCK" unlock-raw --pcrlock=/var/lib/pcrlock.d/910-test70.pcrlock
"$SD_PCRLOCK" unlock-raw --pcrlock=/var/lib/pcrlock.d/920-test70.pcrlock
(! "$SD_PCRLOCK" "")
(! "$SD_PCRLOCK" predict --pcr=-1)
(! "$SD_PCRLOCK" predict --pcr=foo)
(! "$SD_PCRLOCK" predict --pcr=1+1)
(! "$SD_PCRLOCK" predict --pcr=1+++++1)
(! "$SD_PCRLOCK" make-policy --nv-index=0)
(! "$SD_PCRLOCK" make-policy --nv-index=foo)
(! "$SD_PCRLOCK" list-components --location=:)
(! "$SD_PCRLOCK" lock-gpt "")
(! "$SD_PCRLOCK" lock-gpt /dev/sr0)
(! "$SD_PCRLOCK" lock-pe /dev/full)
(! "$SD_PCRLOCK" lock-pe /bin/true)
(! "$SD_PCRLOCK" lock-uki /dev/full)
(! "$SD_PCRLOCK" lock-uki /bin/true)
(! "$SD_PCRLOCK" lock-file-system "")
# Exercise Varlink API a bit (but first turn off condition)
mkdir -p /run/systemd/system/systemd-pcrlock.socket.d
cat > /run/systemd/system/systemd-pcrlock.socket.d/50-no-condition.conf <<EOF
[Unit]
# Turn off all conditions
ConditionSecurity=
EOF
systemctl daemon-reload
systemctl restart systemd-pcrlock.socket
varlinkctl call /run/systemd/io.systemd.PCRLock io.systemd.PCRLock.RemovePolicy '{}'
varlinkctl call /run/systemd/io.systemd.PCRLock io.systemd.PCRLock.MakePolicy '{}'
varlinkctl call --collect --json=pretty /run/systemd/io.systemd.PCRLock io.systemd.PCRLock.ReadEventLog '{}'
rm "$img" /tmp/pcrlockpwd
|
