crypto: drbg - Use callback API for random readiness
authorStephan Mueller <smueller@chronox.de>
Tue, 9 Jun 2015 13:55:38 +0000 (21:55 +0800)
committerHerbert Xu <herbert@gondor.apana.org.au>
Wed, 10 Jun 2015 11:14:01 +0000 (19:14 +0800)
commit57225e6797885e31302e76fc5926c0bedd7e5ad4
tree8cdb966886dcc891cb8c5dd8fd0a90a6f4437983
parent205a525c334295e3cd4cc7755fd2c0398e3a787f
crypto: drbg - Use callback API for random readiness

The get_blocking_random_bytes API is broken because the wait can
be arbitrarily long (potentially forever) so there is no safe way
of calling it from within the kernel.

This patch replaces it with the new callback API which does not
have this problem.

The patch also removes the entropy buffer registered with the DRBG
handle in favor of stack variables to hold the seed data.

Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
crypto/drbg.c
include/crypto/drbg.h