On Fri, Dec 30, 2011 at 11:23:09AM +1100, Herbert Xu wrote:On Thu, Dec 29, 2011 at 08:24:53PM +0400, Cyrill Gorcunov wrote:
Probably I've had to crypto_alloc_hash earlier and simply keep a reference
to algo but since I'm not sure if looking for modules in late-init-call
is good idea.
Right, the allocation needs to occur in a sleepable context.
If you're just hashing something small and have no need for
hardware acceleration then lib/sha1.c is fine.
Hi, yeah, it's just one message block hashing so I've switched
to lib/sha1.c. Herbert, I'm more interested in security analysis
-- would the sha1(msg), where the 'msg' is the kernel pointer
XOR'ed with random value and expanded to the 512 bits would be
safe enough for export to unprivilege users?