tree 6301126016ad869997b4ef31973999e16049dfeb
parent b6f34d44cb341ad32f08717d1a2c418e6053a031
author Neil Horman <nhorman@tuxdriver.com> 1245325821 +0800
committer Herbert Xu <herbert@gondor.apana.org.au> 1245325821 +0800

random: Add optional continuous repetition test to entropy store based rngs

FIPS-140 requires that all random number generators implement continuous self
tests in which each extracted block of data is compared against the last block
for repetition.  The ansi_cprng implements such a test, but it would be nice if
the hw rng's did the same thing.  Obviously its not something thats always
needed, but it seems like it would be a nice feature to have on occasion. I've
written the below patch which allows individual entropy stores to be flagged as
desiring a continuous test to be run on them as is extracted.  By default this
option is off, but is enabled in the event that fips mode is selected during
bootup.

Signed-off-by: Neil Horman <nhorman@tuxdriver.com>
Acked-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>