Re: [PATCH] keys, trusted: select TPM2 hash algorithm

[Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>]

On Sun, Oct 25, 2015 at 03:21:31PM -0400, Mimi Zohar wrote:
> On Sat, 2015-10-24 at 15:42 +0300, Jarkko Sakkinen wrote:
> > Added 'hashalg=' option for selecting the hash algorithm.
> > 
> > Currently available options are:
> > 
> > * sha1
> > * sha256
> > * sha384
> > * sha512
> > * sm3_256
> 
> Please consider using crypto/hash_info.c: hash_algo_name[], which
> already define the algorithm string names.  Use
> include/crypto/hash_info.c to include a reference to this array.

It wold work for me. I did ad-hoc because first example that I looked
at was EcryptFS.

I need to add sm3_256 to that array.

I've found three different ways to write it:

* sm3256 (various google hits)
* sm3-256 (various google hits)
* sm3_256 (TPM 2.0 Structures specification)

Maybe the second option would be the most appropriate?

> Boot command line options should be prefixed with the subsystem name.
> So instead of hashalg, please use tpm_hashalg.  The boot command line
> option needs to be documented in Documentation/kernel-parameters.txt.

I see. My commit message is clearly inadequate. It's an option for the
keyring syscalls.

> Mimi

/Jarkko