Hi,
I am trying to write a hmac(sha1) algorithm and I have a few questions.
I have a HW crypto accelerator that does the actual crypto work. I have
already successfully implemented sha1 by creating a
CRYPTO_ALG_TYPE_DIGEST algorithm.
1) Can I implement hmac(sha1) as a CRYPTO_ALG_TYPE_DIGEST algorithm
(i.e. use very similar code to sha1)?
2) Do I need to create a CRYPTO_ALG_TYPE_HASH algorithm?
3) Is it possible to implement hmac(sha1) as both CRYPTO_ALG_TYPE_DIGEST
and CRYPTO_ALG_TYPE_HASH?
4) If I use a CRYPTO_ALG_TYPE_HASH, I need to understand the scatterwalk
api, is there any help on the subject?
Regards,
Dimitris
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