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authorNeil Horman <nhorman@tuxdriver.com>2009-06-18 07:50:21 -0400
committerHerbert Xu <herbert@gondor.apana.org.au>2009-06-18 07:50:21 -0400
commit5b739ef8a4e8cf5201d21abff897e292c232477b (patch)
tree6301126016ad869997b4ef31973999e16049dfeb /crypto/internal.h
parentb6f34d44cb341ad32f08717d1a2c418e6053a031 (diff)
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>
Diffstat (limited to 'crypto/internal.h')
-rw-r--r--crypto/internal.h7
1 files changed, 1 insertions, 6 deletions
diff --git a/crypto/internal.h b/crypto/internal.h
index 113579a82df..95baaea21fb 100644
--- a/crypto/internal.h
+++ b/crypto/internal.h
@@ -25,12 +25,7 @@
25#include <linux/notifier.h> 25#include <linux/notifier.h>
26#include <linux/rwsem.h> 26#include <linux/rwsem.h>
27#include <linux/slab.h> 27#include <linux/slab.h>
28 28#include <linux/fips.h>
29#ifdef CONFIG_CRYPTO_FIPS
30extern int fips_enabled;
31#else
32#define fips_enabled 0
33#endif
34 29
35/* Crypto notification events. */ 30/* Crypto notification events. */
36enum { 31enum {