On Tue, 2021-10-26 at 15:56 +0800, Tianjia Zhang wrote:

According to https://tools.ietf.org/id/draft-oscca-cfrg-sm3-01.html,
SM3 always produces a 256-bit hash value and there are no plans for
other length development, so there is no ambiguity in the name of
sm3.

Please just drop this piece.

[...]

        hash=         hash algorithm name as a string. For TPM 1.x
the only
                      allowed value is sha1. For TPM 2.x the allowed
values
-                     are sha1, sha256, sha384, sha512 and sm3-256.
+                     are sha1, sha256, sha384, sha512 and sm3.

the hash parameter is an external ABI we can't simply change ... as
Jarkko already told you.

The rest are constants defined in the TPM standard, which we shouldn't
change because then it makes everyone wonder why we're deviating.

James