shash_alg size fields and stomping memory

shash_alg size fields and stomping memory

[Kent Borg]

In struct shash_alg what are the various sizes for?  (WOuld be cool to 
know what everything is for in those alg structures...)

My most recent discovery is that if I want to do an shash_desc_ctx() and 
use the result, cra_ctxsize doesn't seem to mean a thing.  Rather, 
unless I set descsize, memory will be stomped.

And, while I am at it, what is "cra"? 


-kb, the Kent who would love to RTFM but there doesn't seem to be an FM.

Re: shash_alg size fields and stomping memory

[Herbert Xu]

Kent Borg <kentborg@borg.org> wrote:
> 
> My most recent discovery is that if I want to do an shash_desc_ctx() and 
> use the result, cra_ctxsize doesn't seem to mean a thing.  Rather, 
> unless I set descsize, memory will be stomped.

descsize specifies the size of shash_desc_ctx.  ctxsize is the
size of crypto_shash_ctx.

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