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#!/usr/bin/env bash
# SPDX-License-Identifier: BSD-3-Clause
set -ufx
# sample 4096b RSA certificate
cat << EOF > testcert.pem
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
EOF
PEMSIZE=`ls -l testcert.pem | awk '{print $5}'`
# allocate NV index in the TPM
PEMINDEX=$(tpm2_nvdefine -C owner -s ${PEMSIZE} | cut -d ' ' -f 2 | head -n 1)
# store first 1024 bytes of the PEM certificate to the NV index
head -c 1024 testcert.pem > testcert.pem1
tpm2_nvwrite -i testcert.pem1 ${PEMINDEX}
# store the rest
tail -c `expr $PEMSIZE - 1024` testcert.pem > testcert.pem2
tpm2_nvwrite -i testcert.pem2 --offset=1024 ${PEMINDEX}
# retrieve the certificate
openssl x509 -provider tpm2 -provider base -in handle:${PEMINDEX} -text -noout
# delete the NV index
tpm2_nvundefine ${PEMINDEX}
rm testcert.pem testcert.pem1 testcert.pem2
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