tree 8cdb966886dcc891cb8c5dd8fd0a90a6f4437983
parent 205a525c334295e3cd4cc7755fd2c0398e3a787f
author Stephan Mueller <smueller@chronox.de> 1433858138 +0800
committer Herbert Xu <herbert@gondor.apana.org.au> 1433934841 +0800

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>