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#!/usr/bin/env bash
# SPDX-License-Identifier: LGPL-2.1-or-later
set -ex
set -o pipefail
# shellcheck source=test/units/util.sh
. "$(dirname "$0")"/util.sh
export SYSTEMD_LOG_LEVEL=debug
cryptsetup_has_token_plugin_support() {
local plugin_path
plugin_path="$(cryptsetup --help | sed -nr 's/.*LUKS2 external token plugin path: (.*)\./\1/p')/libcryptsetup-token-systemd-tpm2.so)"
cryptsetup --help | grep -q 'LUKS2 external token plugin support is compiled-in' && [[ -f "$plugin_path" ]]
}
tpm_check_failure_with_wrong_pin() {
local testIMAGE="${1:?}"
local badpin="${2:?}"
local goodpin="${3:?}"
# We need to be careful not to trigger DA lockout; allow 2 failures
tpm2_dictionarylockout -s -n 2
(! PIN=$badpin systemd-cryptsetup attach test-volume "$testIMAGE" - tpm2-device=auto,headless=1)
# Verify the correct PIN works, to be sure the failure wasn't a DA lockout
PIN=$goodpin systemd-cryptsetup attach test-volume "$testIMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Clear/reset the DA lockout counter
tpm2_dictionarylockout -c
}
at_exit() {
# Evict the TPM primary key that we persisted
if [[ -n "${PERSISTENT_HANDLE:-}" ]]; then
tpm2_evictcontrol -c "$PERSISTENT_HANDLE"
fi
}
trap at_exit EXIT
# Prepare a fresh disk image
IMAGE="$(mktemp /tmp/systemd-cryptsetup-XXX.IMAGE)"
truncate -s 20M "$IMAGE"
echo -n passphrase >/tmp/passphrase
# Change file mode to avoid "/tmp/passphrase has 0644 mode that is too permissive" messages
chmod 0600 /tmp/passphrase
cryptsetup luksFormat -q --pbkdf pbkdf2 --pbkdf-force-iterations 1000 --use-urandom "$IMAGE" /tmp/passphrase
# Unlocking via keyfile
systemd-cryptenroll --unlock-key-file=/tmp/passphrase --tpm2-device=auto "$IMAGE"
# Enroll unlock with default PCR policy
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Check with wrong PCR
tpm2_pcrextend 7:sha256=0000000000000000000000000000000000000000000000000000000000000000
(! systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1)
# Enroll unlock with PCR+PIN policy
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
PASSWORD=passphrase NEWPIN=123456 systemd-cryptenroll --tpm2-device=auto --tpm2-with-pin=true "$IMAGE"
PIN=123456 systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Check failure with wrong PIN; try a few times to make sure we avoid DA lockout
for _ in {0..3}; do
tpm_check_failure_with_wrong_pin "$IMAGE" 123457 123456
done
# Check LUKS2 token plugin unlock (i.e. without specifying tpm2-device=auto)
if cryptsetup_has_token_plugin_support; then
PIN=123456 systemd-cryptsetup attach test-volume "$IMAGE" - headless=1
systemd-cryptsetup detach test-volume
# Check failure with wrong PIN
for _ in {0..3}; do
tpm_check_failure_with_wrong_pin "$IMAGE" 123457 123456
done
else
echo 'cryptsetup has no LUKS2 token plugin support, skipping'
fi
# Check failure with wrong PCR (and correct PIN)
tpm2_pcrextend 7:sha256=0000000000000000000000000000000000000000000000000000000000000000
(! PIN=123456 systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1)
# Enroll unlock with PCR 0+7
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs=0+7 "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Check with wrong PCR 0
tpm2_pcrextend 0:sha256=0000000000000000000000000000000000000000000000000000000000000000
(! systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1)
if tpm_has_pcr sha256 12; then
# Enroll using an explicit PCR value (that does match current PCR value)
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
EXPECTED_PCR_VALUE=$(cat /sys/class/tpm/tpm0/pcr-sha256/12)
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs="12:sha256=$EXPECTED_PCR_VALUE" "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Same as above plus more PCRs without the value or alg specified
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
EXPECTED_PCR_VALUE=$(cat /sys/class/tpm/tpm0/pcr-sha256/12)
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs="1,12:sha256=$EXPECTED_PCR_VALUE,3" "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Same as above plus more PCRs with hash alg specified but hash value not specified
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
EXPECTED_PCR_VALUE=$(cat /sys/class/tpm/tpm0/pcr-sha256/12)
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs="1:sha256,12:sha256=$EXPECTED_PCR_VALUE,3" "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Now the interesting part, enrolling using a hash value that doesn't match the current PCR value
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
tpm2_pcrread -Q -o /tmp/pcr.dat sha256:12
CURRENT_PCR_VALUE=$(cat /sys/class/tpm/tpm0/pcr-sha256/12)
EXPECTED_PCR_VALUE=$(cat /tmp/pcr.dat /tmp/pcr.dat | openssl dgst -sha256 -r | cut -d ' ' -f 1)
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs="12:sha256=$EXPECTED_PCR_VALUE" "$IMAGE"
(! systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1)
tpm2_pcrextend "12:sha256=$CURRENT_PCR_VALUE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# enroll TPM using device key instead of direct access, then verify unlock using TPM
tpm2_pcrread -Q -o /tmp/pcr.dat sha256:12
CURRENT_PCR_VALUE=$(cat /sys/class/tpm/tpm0/pcr-sha256/12)
tpm2_readpublic -c 0x81000001 -o /tmp/srk.pub
systemd-analyze srk > /tmp/srk2.pub
cmp /tmp/srk.pub /tmp/srk2.pub
if [ -f /run/systemd/tpm2-srk-public-key.tpm2b_public ] ; then
cmp /tmp/srk.pub /run/systemd/tpm2-srk-public-key.tpm2b_public
fi
# --tpm2-device-key= requires OpenSSL >= 3 with KDF-SS
if openssl_supports_kdf SSKDF; then
PASSWORD=passphrase systemd-cryptenroll --tpm2-device-key=/tmp/srk.pub --tpm2-pcrs="12:sha256=$CURRENT_PCR_VALUE" "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
fi
rm -f /tmp/pcr.dat /tmp/srk.pub
fi
# Use default (0) seal key handle
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=0 "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=0x0 "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Use SRK seal key handle
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=81000001 "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=0x81000001 "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# Test invalid ranges: pcr, nv, session, permanent
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
(! PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=7 "$IMAGE") # PCR
(! PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=0x01000001 "$IMAGE") # NV index
(! PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=0x02000001 "$IMAGE") # HMAC/loaded session
(! PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=0x03000001 "$IMAGE") # Policy/saved session
(! PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle=0x40000001 "$IMAGE") # Permanent
# Use non-SRK persistent seal key handle (by creating/persisting new key)
PRIMARY=/tmp/primary.ctx
tpm2_createprimary -c "$PRIMARY"
PERSISTENT_LINE=$(tpm2_evictcontrol -c "$PRIMARY" | grep persistent-handle)
PERSISTENT_HANDLE="0x${PERSISTENT_LINE##*0x}"
tpm2_flushcontext -t
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle="${PERSISTENT_HANDLE#0x}" "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-seal-key-handle="$PERSISTENT_HANDLE" "$IMAGE"
systemd-cryptsetup attach test-volume "$IMAGE" - tpm2-device=auto,headless=1
systemd-cryptsetup detach test-volume
# --tpm2-device-key= requires OpenSSL >= 3 with KDF-SS
if openssl_supports_kdf SSKDF; then
# Make sure that --tpm2-device-key= also works with systemd-repart
tpm2_readpublic -c 0x81000001 -o /tmp/srk.pub
mkdir /tmp/dditest
cat > /tmp/dditest/50-root.conf <<EOF
[Partition]
Type=root
Format=ext4
CopyFiles=/tmp/dditest:/
Encrypt=tpm2
EOF
PASSWORD=passphrase systemd-repart --tpm2-device-key=/tmp/srk.pub --definitions=/tmp/dditest --empty=create --size=50M /tmp/dditest.raw --tpm2-pcrs=
DEVICE="$(systemd-dissect --attach /tmp/dditest.raw)"
systemd-cryptsetup attach dditest "$DEVICE"p1 - tpm2-device=auto,headless=yes
mkdir /tmp/dditest.mnt
mount -t ext4 /dev/mapper/dditest /tmp/dditest.mnt
cmp /tmp/dditest.mnt/50-root.conf /tmp/dditest/50-root.conf
umount /tmp/dditest.mnt
rmdir /tmp/dditest.mnt
rm /tmp/dditest.raw
rm /tmp/dditest/50-root.conf
rmdir /tmp/dditest
fi
rm -f "$IMAGE" "$PRIMARY"
|
