On Thu May 23, 2024 at 6:30 PM EEST, James Bottomley wrote: > On Thu, 2024-05-23 at 16:54 +0300, Jarkko Sakkinen wrote: > > On Thu May 23, 2024 at 4:38 PM EEST, James Bottomley wrote: > > > On Thu, 2024-05-23 at 16:19 +0300, Jarkko Sakkinen 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 is true, but if we're going to do this, we should expand the > > > OID > > > registry functions (in lib/oid_registry.c) to do something like > > > encode_OID. The registry already contains the hex above minus the > > > two > > > prefixes (which are easy to add). > > > > Yes, I do agree with this idea, and I named variable the I named > > it to make it obvious that generation is possible. > > > > It would be best to have a single source, which could be just > > a CSV file with entries like: > > > > <Name>,<OID number> > > > > And then in scripts/ there should be a script that takes this > > source and generates oid_registry.gen.{h,c}. The existing > > oid_registry.h should really just include oid_registry.gen.h > > then to make this transparent change. > > > > And then in the series where OID's are encoded per-subsystem > > patch that takes pre-encoded OID into use. > > > > Happy to review such patch set if it is pushed forward. > > Heh, OK, since I'm the one who thinks it's quite easy, I'll give it a > go.
I guess if it cleaned up multiple sites in kernel then it could be considered useful. I'd guess that there is at least a few locations that also encode OID. BR, Jarkko