[PATCH v2] KEYS: trusted: Use ASN.1 encoded OID

Jarkko Sakkinen jarkko at kernel.org
Thu May 23 14:00:38 UTC 2024


On Thu May 23, 2024 at 4:36 PM EEST, David Howells wrote:
> Jarkko Sakkinen <jarkko at kernel.org> wrote:
>
> > There's no reason to encode OID_TPMSealedData at run-time, as it never
> > changes.
> > 
> > Replace it with the encoded version, which has exactly the same size:
> > 
> > 	67 81 05 0A 01 05
> > 
> > Include OBJECT IDENTIFIER (0x06) tag and length as the epilogue so that
> > the OID can be simply copied to the blob.
>
> This seems reasonable.  We have a limited set of OIDs we can generate
> (currently 1).  Better to store the BER-encoded form and copy that in rather
> than trying to turn a pretty-printed OID into the BER encoding unless we
> absolutely have to.

Yup, I crafted a plan in response to James about possibility to generate
all from a CSV file (oid_registry.gen.[sh] and oid_registry.h incldues
oid_registry.gen.h for compat). 

No bandwidth to work in it, but happy to review it.

>
> David

BR, Jarkko



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