SYSTEMD-TP...UP.SERVICE(8) systemd-tpm2-setup.serviceSYSTEMD-TP...UP.SERVICE(8)
NAME
systemd-tpm2-setup.service, systemd-tpm2-setup-early.service, systemd-
tpm2-setup - Set up the TPM2 Storage Root Key (SRK) at boot
SYNOPSIS
systemd-tpm2-setup.service
/usr/lib/systemd/systemd-tpm2-setup
DESCRIPTION
systemd-tpm2-setup.service and systemd-tpm2-setup-early.service are
services that generate the Storage Root Key (SRK) if it has not been
generated yet, and stores it in the TPM.
The services will store the public key of the SRK key pair in a PEM file
in /run/systemd/tpm2-srk-public-key.pem and
/var/lib/systemd/tpm2-srk-public-key.pem. They will also store it in
TPM2B_PUBLIC format in /run/systemd/tpm2-srk-public-key.tpm2_public and
/var/lib/systemd/tpm2-srk-public-key.tpm2b_public.
systemd-tpm2-setup-early.service runs very early at boot (possibly in
the initrd), and writes the SRK public key to
/run/systemd/tpm2-srk-public-key.* (as /var/ is generally not
accessible this early yet), while systemd-tpm2-setup.service runs during
a later boot phase and saves the public key to
/var/lib/systemd/tpm2-srk-public-key.*.
FILES
/run/systemd/tpm2-srk-public-key.pem,
/run/systemd/tpm2-srk-public-key.tpm2b_public
The SRK public key in PEM and TPM2B_PUBLIC format, written during
early boot.
Added in version 255.
/var/lib/systemd/tpm2-srk-public-key.pem,
/var/lib/systemd/tpm2-srk-public-key.tpm2_public
The SRK public key in PEM and TPM2B_PUBLIC format, written during
later boot (once /var/ is available).
Added in version 255.
SEE ALSO
systemd(1)
systemd 257.9 SYSTEMD-TP...UP.SERVICE(8)
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