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test: add a couple more tests for systemd-pcrextend

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This commit is contained in:
Frantisek Sumsal 2023-10-25 17:42:07 +02:00
parent 45534eefe6
commit af70e2021e
2 changed files with 50 additions and 0 deletions
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2
test/test-functions
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@ -169,6 +169,7 @@ BASICTOOLS=(
echo
env
false
findmnt
flock
getconf
getent
@ -188,6 +189,7 @@ BASICTOOLS=(
login
losetup
lsattr
lsblk
lz4cat
mkfifo
mknod

48
test/units/testsuite-70.pcrextend.sh
View file

@ -23,6 +23,41 @@ at_exit() {
trap at_exit EXIT
# Temporarily override sd-pcrextend's sanity checks
export SYSTEMD_FORCE_MEASURE=1
"$SD_PCREXTEND" --help
"$SD_PCREXTEND" --version
"$SD_PCREXTEND" foo
"$SD_PCREXTEND" --machine-id
"$SD_PCREXTEND" --tpm2-device=list
"$SD_PCREXTEND" --tpm2-device=auto foo
"$SD_PCREXTEND" --tpm2-device=/dev/tpm0 foo
"$SD_PCREXTEND" --bank=sha256 foo
"$SD_PCREXTEND" --bank=sha256 --bank=sha256 foo
"$SD_PCREXTEND" --graceful foo
"$SD_PCREXTEND" --pcr=15 foo
"$SD_PCREXTEND" --file-system=/
"$SD_PCREXTEND" --file-system=/tmp --file-system=/
"$SD_PCREXTEND" --file-system=/tmp --file-system=/ --pcr=15 --pcr=11
if tpm_has_pcr sha1 11; then
"$SD_PCREXTEND" --bank=sha1 --pcr=11 foo
fi
(! "$SD_PCREXTEND")
(! "$SD_PCREXTEND" "")
(! "$SD_PCREXTEND" foo bar)
(! "$SD_PCREXTEND" --bank= foo)
(! "$SD_PCREXTEND" --tpm2-device= foo)
(! "$SD_PCREXTEND" --tpm2-device=/dev/null foo)
(! "$SD_PCREXTEND" --pcr= foo)
(! "$SD_PCREXTEND" --pcr=-1 foo)
(! "$SD_PCREXTEND" --pcr=1024 foo)
(! "$SD_PCREXTEND" --foo=bar)
unset SYSTEMD_FORCE_MEASURE
# Note: since we're reading the TPM event log as json-seq, the same rules apply to the output
# as well, i.e. each record is prefixed by RS (0x1E, 036) and suffixed by LF (0x0A, 012).
# LF is usually eaten by bash, but RS needs special handling.
@ -73,4 +108,17 @@ DIGEST_EXPECTED="$(echo -n "foobar" | openssl dgst -hex -sha256 -r)"
DIGEST_CURRENT="$(jq --seq --slurp --raw-output ".[$RECORD_COUNT].digests[] | select(.hashAlg == \"sha256\").digest" </run/log/systemd/tpm2-measure.log) *stdin"
test "$DIGEST_EXPECTED" == "$DIGEST_CURRENT"
# Measure a file system into PCR 15
tpm2_pcrread sha256:15 -Q -o /tmp/oldpcr15
SYSTEMD_FORCE_MEASURE=1 "$SD_PCREXTEND" --file-system=/
# Put together the "file system word" we just sent to the TPM
# file-system:MOUNTPOINT:TYPE:UUID:LABEL:PART_ENTRY_UUID:PART_ENTRY_TYPE:PART_ENTRY_NAME
ROOT_DEVICE="$(findmnt -n -o SOURCE /)"
FS_WORD="$(lsblk -n -o MOUNTPOINT,FSTYPE,UUID,LABEL,PARTUUID,PARTTYPE,PARTLABEL "$ROOT_DEVICE" | sed -r 's/[ ]+/:/g')"
tpm2_pcrread sha256:15 -Q -o /tmp/newpcr15
# And check if it matches with the current PCR 15 state
diff /tmp/newpcr15 \
<(cat /tmp/oldpcr15 <(echo -n "file-system:$FS_WORD" | openssl dgst -binary -sha256) | openssl dgst -binary -sha256)
rm -f /tmp/oldpcr{11,15} /tmp/newpcr{11,15}