#!/usr/bin/env bash # SPDX-License-Identifier: LGPL-2.1-or-later set -eux set -o pipefail # shellcheck source=test/units/util.sh . "$(dirname "$0")"/util.sh export SYSTEMD_LOG_LEVEL=debug SD_MEASURE="/usr/lib/systemd/systemd-measure" if [[ ! -x "${SD_MEASURE:?}" ]]; then echo "$SD_MEASURE not found, skipping the test" exit 0 fi IMAGE="$(mktemp /tmp/systemd-measure-XXX.image)" echo HALLO >/tmp/tpmdata1 echo foobar >/tmp/tpmdata2 cat >/tmp/result <<EOF 11:sha1=5177e4ad69db92192c10e5f80402bf81bfec8a81 11:sha256=37b48bd0b222394dbe3cceff2fca4660c4b0a90ae9369ec90b42f14489989c13 11:sha384=5573f9b2caf55b1d0a6a701f890662d682af961899f0419cf1e2d5ea4a6a68c1f25bd4f5b8a0865eeee82af90f5cb087 11:sha512=961305d7e9981d6606d1ce97b3a9a1f92610cac033e9c39064895f0e306abc1680463d55767bd98e751eae115bdef3675a9ee1d29ed37da7885b1db45bb2555b EOF "$SD_MEASURE" calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 --phase=: | cmp - /tmp/result cat >/tmp/result.json <<EOF {"sha1":[{"pcr":11,"hash":"5177e4ad69db92192c10e5f80402bf81bfec8a81"}],"sha256":[{"pcr":11,"hash":"37b48bd0b222394dbe3cceff2fca4660c4b0a90ae9369ec90b42f14489989c13"}],"sha384":[{"pcr":11,"hash":"5573f9b2caf55b1d0a6a701f890662d682af961899f0419cf1e2d5ea4a6a68c1f25bd4f5b8a0865eeee82af90f5cb087"}],"sha512":[{"pcr":11,"hash":"961305d7e9981d6606d1ce97b3a9a1f92610cac033e9c39064895f0e306abc1680463d55767bd98e751eae115bdef3675a9ee1d29ed37da7885b1db45bb2555b"}]} EOF "$SD_MEASURE" calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 --phase=: -j | diff -u - /tmp/result.json cat >/tmp/result <<EOF 11:sha1=6765ee305db063040c454d32697d922b3d4f232b 11:sha256=21c49c1242042649e09c156546fd7d425ccc3c67359f840507b30be4e0f6f699 11:sha384=08d0b003a134878eee552070d51d58abe942f457ca85704131dd36f73728e7327ca837594bc9d5ac7de818d02a3d5dd2 11:sha512=65120f6ebc04b156421c6f3d543b2fad545363d9ca61c514205459e9c0e0b22e09c23605eae5853e38458ef3ca54e087168af8d8a882a98d220d9391e48be6d0 EOF "$SD_MEASURE" calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 --phase=foo | cmp - /tmp/result cat >/tmp/result.json <<EOF {"sha1":[{"phase":"foo","pcr":11,"hash":"6765ee305db063040c454d32697d922b3d4f232b"}],"sha256":[{"phase":"foo","pcr":11,"hash":"21c49c1242042649e09c156546fd7d425ccc3c67359f840507b30be4e0f6f699"}],"sha384":[{"phase":"foo","pcr":11,"hash":"08d0b003a134878eee552070d51d58abe942f457ca85704131dd36f73728e7327ca837594bc9d5ac7de818d02a3d5dd2"}],"sha512":[{"phase":"foo","pcr":11,"hash":"65120f6ebc04b156421c6f3d543b2fad545363d9ca61c514205459e9c0e0b22e09c23605eae5853e38458ef3ca54e087168af8d8a882a98d220d9391e48be6d0"}]} EOF "$SD_MEASURE" calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 --phase=foo -j | diff -u - /tmp/result.json rm /tmp/result /tmp/result.json if ! tpm_has_pcr sha1 11 || ! tpm_has_pcr sha256 11; then echo "PCR sysfs files not found, skipping signed PCR policy tests" exit 0 fi # 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" MEASURE_BANKS=("--bank=sha256") # Check if SHA1 signatures are supported # # Some distros have started phasing out SHA1, so make sure the SHA1 # signatures are supported before trying to use them. if echo hello | openssl dgst -sign /tmp/pcrsign-private.pem -sha1 >/dev/null; then MEASURE_BANKS+=("--bank=sha1") fi # Sign current PCR state with it "$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: | 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) # Sign new PCR state, decrypting should work now. "$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: >"/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 "$IMAGE" cryptsetup luksFormat -q --pbkdf pbkdf2 --pbkdf-force-iterations 1000 --use-urandom "$IMAGE" /tmp/passphrase # Ensure that an unrelated signature, when not requested, is not used touch /run/systemd/tpm2-pcr-signature.json systemd-cryptenroll --unlock-key-file=/tmp/passphrase --tpm2-device=auto --tpm2-public-key="/tmp/pcrsign-public.pem" "$IMAGE" # Reset and use the signature now rm -f /run/systemd/tpm2-pcr-signature.json systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE" systemd-cryptenroll --unlock-key-file=/tmp/passphrase --tpm2-device=auto --tpm2-public-key="/tmp/pcrsign-public.pem" --tpm2-signature="/tmp/pcrsign.sig2" "$IMAGE" # Check if we can activate that (without the token module stuff) SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1 SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup detach test-volume2 # Check if we can activate that (and a second time with the token module stuff enabled) SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1 SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 systemd-cryptsetup detach test-volume2 # After extending the PCR things should fail tpm2_pcrextend 11:sha256=0000000000000000000000000000000000000000000000000000000000000000 (! SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1) (! SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1) # But once we sign the current PCRs, we should be able to unlock again "$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: >"/tmp/pcrsign.sig3" SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig3",headless=1 systemd-cryptsetup detach test-volume2 SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig3",headless=1 systemd-cryptsetup detach test-volume2 # Test --append mode and de-duplication. With the same parameters signing should not add a new entry "$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: --append="/tmp/pcrsign.sig3" >"/tmp/pcrsign.sig4" cmp "/tmp/pcrsign.sig3" "/tmp/pcrsign.sig4" # Sign one more phase, this should "$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=quux:waldo --append="/tmp/pcrsign.sig4" >"/tmp/pcrsign.sig5" (! cmp "/tmp/pcrsign.sig4" "/tmp/pcrsign.sig5") # Should still be good to unlock, given the old entry still exists SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig5",headless=1 systemd-cryptsetup detach test-volume2 # Adding both signatures once more should not change anything, due to the deduplication "$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: --append="/tmp/pcrsign.sig5" >"/tmp/pcrsign.sig6" "$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=quux:waldo --append="/tmp/pcrsign.sig6" >"/tmp/pcrsign.sig7" cmp "/tmp/pcrsign.sig5" "/tmp/pcrsign.sig7" rm -f "$IMAGE"