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131 lines
8.3 KiB
Bash
Executable File
131 lines
8.3 KiB
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-License-Identifier: LGPL-2.1-or-later
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set -eux
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set -o pipefail
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# shellcheck source=test/units/util.sh
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. "$(dirname "$0")"/util.sh
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export SYSTEMD_LOG_LEVEL=debug
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SD_MEASURE="/usr/lib/systemd/systemd-measure"
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if [[ ! -x "${SD_MEASURE:?}" ]]; then
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echo "$SD_MEASURE not found, skipping the test"
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exit 0
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fi
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IMAGE="$(mktemp /tmp/systemd-measure-XXX.image)"
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echo HALLO >/tmp/tpmdata1
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echo foobar >/tmp/tpmdata2
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cat >/tmp/result <<EOF
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11:sha1=5177e4ad69db92192c10e5f80402bf81bfec8a81
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11:sha256=37b48bd0b222394dbe3cceff2fca4660c4b0a90ae9369ec90b42f14489989c13
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11:sha384=5573f9b2caf55b1d0a6a701f890662d682af961899f0419cf1e2d5ea4a6a68c1f25bd4f5b8a0865eeee82af90f5cb087
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11:sha512=961305d7e9981d6606d1ce97b3a9a1f92610cac033e9c39064895f0e306abc1680463d55767bd98e751eae115bdef3675a9ee1d29ed37da7885b1db45bb2555b
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EOF
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"$SD_MEASURE" calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 --phase=: | cmp - /tmp/result
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cat >/tmp/result.json <<EOF
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{"sha1":[{"pcr":11,"hash":"5177e4ad69db92192c10e5f80402bf81bfec8a81"}],"sha256":[{"pcr":11,"hash":"37b48bd0b222394dbe3cceff2fca4660c4b0a90ae9369ec90b42f14489989c13"}],"sha384":[{"pcr":11,"hash":"5573f9b2caf55b1d0a6a701f890662d682af961899f0419cf1e2d5ea4a6a68c1f25bd4f5b8a0865eeee82af90f5cb087"}],"sha512":[{"pcr":11,"hash":"961305d7e9981d6606d1ce97b3a9a1f92610cac033e9c39064895f0e306abc1680463d55767bd98e751eae115bdef3675a9ee1d29ed37da7885b1db45bb2555b"}]}
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EOF
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"$SD_MEASURE" calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 --phase=: -j | diff -u - /tmp/result.json
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cat >/tmp/result <<EOF
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11:sha1=6765ee305db063040c454d32697d922b3d4f232b
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11:sha256=21c49c1242042649e09c156546fd7d425ccc3c67359f840507b30be4e0f6f699
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11:sha384=08d0b003a134878eee552070d51d58abe942f457ca85704131dd36f73728e7327ca837594bc9d5ac7de818d02a3d5dd2
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11:sha512=65120f6ebc04b156421c6f3d543b2fad545363d9ca61c514205459e9c0e0b22e09c23605eae5853e38458ef3ca54e087168af8d8a882a98d220d9391e48be6d0
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EOF
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"$SD_MEASURE" calculate --linux=/tmp/tpmdata1 --initrd=/tmp/tpmdata2 --bank=sha1 --bank=sha256 --bank=sha384 --bank=sha512 --phase=foo | cmp - /tmp/result
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cat >/tmp/result.json <<EOF
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{"sha1":[{"phase":"foo","pcr":11,"hash":"6765ee305db063040c454d32697d922b3d4f232b"}],"sha256":[{"phase":"foo","pcr":11,"hash":"21c49c1242042649e09c156546fd7d425ccc3c67359f840507b30be4e0f6f699"}],"sha384":[{"phase":"foo","pcr":11,"hash":"08d0b003a134878eee552070d51d58abe942f457ca85704131dd36f73728e7327ca837594bc9d5ac7de818d02a3d5dd2"}],"sha512":[{"phase":"foo","pcr":11,"hash":"65120f6ebc04b156421c6f3d543b2fad545363d9ca61c514205459e9c0e0b22e09c23605eae5853e38458ef3ca54e087168af8d8a882a98d220d9391e48be6d0"}]}
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EOF
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"$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
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rm /tmp/result /tmp/result.json
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if ! tpm_has_pcr sha1 11 || ! tpm_has_pcr sha256 11; then
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echo "PCR sysfs files not found, skipping signed PCR policy tests"
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exit 0
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fi
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# Generate key pair
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openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:2048 -out "/tmp/pcrsign-private.pem"
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openssl rsa -pubout -in "/tmp/pcrsign-private.pem" -out "/tmp/pcrsign-public.pem"
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MEASURE_BANKS=("--bank=sha256")
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# Check if SHA1 signatures are supported
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#
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# Some distros have started phasing out SHA1, so make sure the SHA1
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# signatures are supported before trying to use them.
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if echo hello | openssl dgst -sign /tmp/pcrsign-private.pem -sha1 >/dev/null; then
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MEASURE_BANKS+=("--bank=sha1")
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fi
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# Sign current PCR state with it
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"$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: | tee "/tmp/pcrsign.sig"
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dd if=/dev/urandom of=/tmp/pcrtestdata bs=1024 count=64
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systemd-creds encrypt /tmp/pcrtestdata /tmp/pcrtestdata.encrypted --with-key=host+tpm2-with-public-key --tpm2-public-key="/tmp/pcrsign-public.pem"
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systemd-creds decrypt /tmp/pcrtestdata.encrypted - --tpm2-signature="/tmp/pcrsign.sig" | cmp - /tmp/pcrtestdata
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# Invalidate PCR, decrypting should fail now
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tpm2_pcrextend 11:sha256=0000000000000000000000000000000000000000000000000000000000000000
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(! systemd-creds decrypt /tmp/pcrtestdata.encrypted - --tpm2-signature="/tmp/pcrsign.sig" >/dev/null)
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# Sign new PCR state, decrypting should work now.
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"$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: >"/tmp/pcrsign.sig2"
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systemd-creds decrypt /tmp/pcrtestdata.encrypted - --tpm2-signature="/tmp/pcrsign.sig2" | cmp - /tmp/pcrtestdata
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# Now, do the same, but with a cryptsetup binding
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truncate -s 20M "$IMAGE"
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cryptsetup luksFormat -q --pbkdf pbkdf2 --pbkdf-force-iterations 1000 --use-urandom "$IMAGE" /tmp/passphrase
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# Ensure that an unrelated signature, when not requested, is not used
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touch /run/systemd/tpm2-pcr-signature.json
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systemd-cryptenroll --unlock-key-file=/tmp/passphrase --tpm2-device=auto --tpm2-public-key="/tmp/pcrsign-public.pem" "$IMAGE"
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# Reset and use the signature now
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rm -f /run/systemd/tpm2-pcr-signature.json
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systemd-cryptenroll --wipe-slot=tpm2 "$IMAGE"
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systemd-cryptenroll --unlock-key-file=/tmp/passphrase --tpm2-device=auto --tpm2-public-key="/tmp/pcrsign-public.pem" --tpm2-signature="/tmp/pcrsign.sig2" "$IMAGE"
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# Check if we can activate that (without the token module stuff)
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SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1
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SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup detach test-volume2
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# Check if we can activate that (and a second time with the token module stuff enabled)
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SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1
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SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 systemd-cryptsetup detach test-volume2
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# After extending the PCR things should fail
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tpm2_pcrextend 11:sha256=0000000000000000000000000000000000000000000000000000000000000000
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(! SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1)
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(! SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig2",headless=1)
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# But once we sign the current PCRs, we should be able to unlock again
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"$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: >"/tmp/pcrsign.sig3"
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SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig3",headless=1
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systemd-cryptsetup detach test-volume2
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SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=1 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig3",headless=1
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systemd-cryptsetup detach test-volume2
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# Test --append mode and de-duplication. With the same parameters signing should not add a new entry
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"$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: --append="/tmp/pcrsign.sig3" >"/tmp/pcrsign.sig4"
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cmp "/tmp/pcrsign.sig3" "/tmp/pcrsign.sig4"
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# Sign one more phase, this should
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"$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=quux:waldo --append="/tmp/pcrsign.sig4" >"/tmp/pcrsign.sig5"
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(! cmp "/tmp/pcrsign.sig4" "/tmp/pcrsign.sig5")
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# Should still be good to unlock, given the old entry still exists
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SYSTEMD_CRYPTSETUP_USE_TOKEN_MODULE=0 systemd-cryptsetup attach test-volume2 "$IMAGE" - tpm2-device=auto,tpm2-signature="/tmp/pcrsign.sig5",headless=1
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systemd-cryptsetup detach test-volume2
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# Adding both signatures once more should not change anything, due to the deduplication
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"$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=: --append="/tmp/pcrsign.sig5" >"/tmp/pcrsign.sig6"
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"$SD_MEASURE" sign --current "${MEASURE_BANKS[@]}" --private-key="/tmp/pcrsign-private.pem" --public-key="/tmp/pcrsign-public.pem" --phase=quux:waldo --append="/tmp/pcrsign.sig6" >"/tmp/pcrsign.sig7"
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cmp "/tmp/pcrsign.sig5" "/tmp/pcrsign.sig7"
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rm -f "$IMAGE"
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