Messages in this thread | | | Subject | Re: [PATCH/proposal] dm-crypt: add digest-based iv generation mode | From | Christophe Saout <> | Date | Fri, 20 Feb 2004 23:40:13 +0100 |
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James,
> The crypto_hmac_init part could be done in the dm target constructor > once and then call crypto_hmac_update and crypto_hmac_final in the > iv_generator but this would require some cryptoapi hacking which I'm > not too happy about. I would like to make a copy of the tfm (including > the private context) on the stack and then operate on that copy for > crypto_hmac_update and crypto_hmac_final. > > Can I have a function to return the tfm size so I can do a memcpy > to a variable on the stack? I could get rid of the mutex too then.
What do you think of this?
I would like to copy the tfm onto the stack so that I can a) compute the hmac on several CPUs at the same time without locking b) reuse a precomputed tfm from just after crypt_hmac_init
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