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authorNeil Horman <nhorman@tuxdriver.com>2009-06-18 19:50:21 +0800
committerHerbert Xu <herbert@gondor.apana.org.au>2009-06-18 19:50:21 +0800
commit5b739ef8a4e8cf5201d21abff897e292c232477b (patch)
tree6301126016ad869997b4ef31973999e16049dfeb /include/linux/fips.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 'include/linux/fips.h')
-rw-r--r--include/linux/fips.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/fips.h b/include/linux/fips.h
new file mode 100644
index 00000000000..f8fb07b0b6b
--- /dev/null
+++ b/include/linux/fips.h
@@ -0,0 +1,10 @@
+#ifndef _FIPS_H
+#define _FIPS_H
+
+#ifdef CONFIG_CRYPTO_FIPS
+extern int fips_enabled;
+#else
+#define fips_enabled 0
+#endif
+
+#endif