Paul Meyer
57f8a85a21
Motivated by https://github.com/systemd/systemd/pull/43041#discussion_r3595022610. Switch systemd-cryptsetup's volume-key and keyslot measurements from driving the TPM directly (tpm2-util) to the io.systemd.PCRExtend Varlink service, aligning it with how the verity and imds measurements already work. Some notes on decisions taken: - The volume key is sent over the wire. systemd-pcrextend will do the hmac. The socket is root only. Otherwise we would need to do bank negotiation via varlink and pollute the interface with it. - `tpm2-measure-bank=` deprecated/dropped. Same reason as above. - `tpm2-device=` now only affects unlocking. The device for measurements is selected by pcrextend. - Measuring requires the presence of `systemd-pcrextend.socket` in the initrd, should be already given as systemd-veritysetup relies on it, too. - Logs are done on the pcrextend side.
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