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 hasn't 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)