Re: [PATCH v4 1/3] crypto: ti - Add support for SHA224/256/384/512 in DTHEv2 driver

[Herbert Xu]

On Fri, Jun 05, 2026 at 04:11:49PM +0530, T Pratham wrote:
>
> .cra_flags sets CRYPTO_AHASH_ALG_BLOCK_ONLY and
> CRYPTO_AHASH_ALG_FINAL_NONZERO flags. An update of 64 bytes will do an
> update of block size and carry over at least one byte to final. We
> always go into this if block when there is non-zero data coming into update.

For AHASH_BLOCK_ONLY algorithms, the export format must be identical
between different implementations.

Therefore FINAL_NONZERO cannot be used for only one implementation
since the user can import the partial state from a different
implementation which does not have FINAL_NONZERO set.

For sha you cannot use FINAL_NONZERO since the generic implementation
doesn't use it.

Cheers,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
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