Re: [PATCH RFC v2 0/5] Asymmetric TPM2 key type

Jarkko Sakkinen
2024-05-19T12:49:34Z

On Sun May 19, 2024 at 3:25 AM EEST, Jarkko Sakkinen wrote:
> ## Overview
>
> Introduce tpm2_key_rsa implementing asymmetric TPM RSA key.
>
> I submit this first as RFC as I could not execute the keyctl padd in the
> following sequence (returns EBADF):
>
> tpm2_createprimary --hierarchy o -G rsa2048 -c owner.txt
> tpm2_evictcontrol -c owner.txt 0x81000001
> tpm2_getcap handles-persistent
> openssl genrsa -out private.pem 2048
> tpm2_import -C 0x81000001 -G rsa -i private.pem -u key.pub -r key.priv
> tpm2_encodeobject -C 0x81000001 -u key.pub -r key.priv -o key.priv.pem
> openssl asn1parse -inform pem -in key.priv.pem -noout -out key.priv.der
> key_serial=`cat key.priv.der | keyctl padd asymmetric tpm @u`

After v2 changes it ends up to -EINVAL and:

OID is "2.23.133.10.1.3" which is not TPMSealedData

which makes total sense. James' old patch set has already TPMLoadableKey
parsing PoC'd so I use that as the reference.

After the sequence above successfully completes keyctl public key ops
are accesible by using $key_serial as the serial.

BR, Jarkko