Conversation
jarkko

Jarkko Sakkinen

One bottleneck in HMAC encryption that would be easy to solve if TPMKey ASN.1 format would store 'parentPublic', or alternatively 'parentPublicName'.

HMAC encryption requires "extra" TPM2_ReadPublic per unseal transaction because it cannot be stored to the key data.

If it had the field it would be trivial to calculate cryptographic name for the parent object without roundtrip to TPM2 chip when the key is used after creation.

I.e. it is classic value not cached that would be constantly required.

RT @Foxboron
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