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TEST-70-TPM2: add test for new signed TPM2 PCR policies

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This commit is contained in:
Lennart Poettering 2022-08-19 11:26:49 +02:00
parent 75a9681ec0
commit 7c46b19718
2 changed files with 61 additions and 1 deletions
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1
test/TEST-70-TPM2/test.sh
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@ -20,6 +20,7 @@ test_append_files() {
install_dmevent
generate_module_dependencies
inst_binary tpm2_pcrextend
inst_binary openssl
}
TEST_70_TPM_DEVICE="tpm-tis"

61
test/units/testsuite-70.sh
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@ -57,6 +57,8 @@ env PASSWORD=passphrase systemd-cryptenroll --tpm2-device=auto --tpm2-pcrs=0+7 $
tpm2_pcrextend 0:sha256=0000000000000000000000000000000000000000000000000000000000000000
/usr/lib/systemd/systemd-cryptsetup attach test-volume $img - tpm2-device=auto,headless=1 && exit 1
rm $img
if [[ -e /usr/lib/systemd/systemd-measure ]]; then
echo HALLO > /tmp/tpmdata1
echo foobar > /tmp/tpmdata2
@ -69,8 +71,65 @@ if [[ -e /usr/lib/systemd/systemd-measure ]]; then
EOF
/usr/lib/systemd/systemd-measure calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 | cmp - /tmp/result
cat >/tmp/result.json <<EOF
{"sha1":[{"pcr":11,"hash":"5177e4ad69db92192c10e5f80402bf81bfec8a81"}],"sha256":[{"pcr":11,"hash":"37b48bd0b222394dbe3cceff2fca4660c4b0a90ae9369ec90b42f14489989c13"}],"sha384":[{"pcr":11,"hash":"5573f9b2caf55b1d0a6a701f890662d682af961899f0419cf1e2d5ea4a6a68c1f25bd4f5b8a0865eeee82af90f5cb087"}],"sha512":[{"pcr":11,"hash":"961305d7e9981d6606d1ce97b3a9a1f92610cac033e9c39064895f0e306abc1680463d55767bd98e751eae115bdef3675a9ee1d29ed37da7885b1db45bb2555b"}]}
EOF
/usr/lib/systemd/systemd-measure calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 -j | diff -u - /tmp/result.json
else
echo "/usr/lib/systemd/systemd-measure not found, skipping the test case"
echo "/usr/lib/systemd/systemd-measure not found, skipping PCR policy test case"
fi
if [ -e /usr/lib/systemd/systemd-measure ] && \
[ -f /sys/class/tpm/tpm0/pcr-sha1/11 ] && \
[ -f /sys/class/tpm/tpm0/pcr-sha256/11 ]; then
# Generate key pair
openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -out "/tmp/pcrsign-private.pem"
openssl rsa -pubout -in "/tmp/pcrsign-private.pem" -out "/tmp/pcrsign-public.pem"
# Sign current PCR state with it
/usr/lib/systemd/systemd-measure sign --current --bank=sha1 --bank=sha256 --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" | tee "/tmp/pcrsign.sig"
dd if=/dev/urandom of=/tmp/pcrtestdata bs=1024 count=64
systemd-creds encrypt /tmp/pcrtestdata /tmp/pcrtestdata.encrypted --with-key=host+tpm2-with-public-key --tpm2-public-key="/tmp/pcrsign-public.pem"
systemd-creds decrypt /tmp/pcrtestdata.encrypted - --tpm2-signature="/tmp/pcrsign.sig" | cmp - /tmp/pcrtestdata
# Invalidate PCR, decrypting should fail now
tpm2_pcrextend 11:sha256=0000000000000000000000000000000000000000000000000000000000000000
systemd-creds decrypt /tmp/pcrtestdata.encrypted - --tpm2-signature="/tmp/pcrsign.sig" > /dev/null && { echo 'unexpected success'; exit 1; }
# Sign new PCR state, decrypting should work now.
/usr/lib/systemd/systemd-measure sign --current --bank=sha1 --bank=sha256 --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" > "/tmp/pcrsign.sig2"
systemd-creds decrypt /tmp/pcrtestdata.encrypted - --tpm2-signature="/tmp/pcrsign.sig2" | cmp - /tmp/pcrtestdata
# Now, do the same, but with a cryptsetup binding
truncate -s 20M $img
cryptsetup luksFormat -q --pbkdf pbkdf2 --pbkdf-force-iterations 1000 --use-urandom $img /tmp/passphrase
systemd-cryptenroll --unlock-key-file=/tmp/passphrase --tpm2-device=auto --tpm2-public-key="/tmp/pcrsign-public.pem" --tpm2-signature="/tmp/pcrsign.sig2" $img
# Check if we can activate that (without the token module stuff)
SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 /usr/lib/systemd/systemd-cryptsetup attach test-volume2 $img - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1
SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 /usr/lib/systemd/systemd-cryptsetup detach test-volume2
# Check if we can activate that (and a second time with the the token module stuff enabled)
SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 /usr/lib/systemd/systemd-cryptsetup attach test-volume2 $img - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1
SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 /usr/lib/systemd/systemd-cryptsetup detach test-volume2
# After extending the PCR things should fail
tpm2_pcrextend 11:sha256=0000000000000000000000000000000000000000000000000000000000000000
SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 /usr/lib/systemd/systemd-cryptsetup attach test-volume2 $img - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1 && { echo 'unexpected success'; exit 1; }
SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 /usr/lib/systemd/systemd-cryptsetup attach test-volume2 $img - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1 && { echo 'unexpected success'; exit 1; }
# But once we sign the current PCRs, we should be able to unlock again
/usr/lib/systemd/systemd-measure sign --current --bank=sha1 --bank=sha256 --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" > "/tmp/pcrsign.sig3"
SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 /usr/lib/systemd/systemd-cryptsetup attach test-volume2 $img - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig3",headless=1
/usr/lib/systemd/systemd-cryptsetup detach test-volume2
SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 /usr/lib/systemd/systemd-cryptsetup attach test-volume2 $img - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig3",headless=1
/usr/lib/systemd/systemd-cryptsetup detach test-volume2
rm $img
else
echo "/usr/lib/systemd/systemd-measure or PCR sysfs files not found, skipping signed PCR policy test case"
fi
echo OK >/testok