crypto: rng - RNG interface and implementation

This patch adds a random number generator interface as well as a
cryptographic pseudo-random number generator based on AES.  It is
meant to be used in cases where a deterministic CPRNG is required.

One of the first applications will be as an input in the IPsec IV
generation process.

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

1 files changed, 16 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index a784c2dce57e..2274293e71e1 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -46,6 +46,10 @@ config CRYPTO_HASH
         tristate
         select CRYPTO_ALGAPI
 
+config CRYPTO_RNG
+        tristate
+        select CRYPTO_ALGAPI
+
 config CRYPTO_MANAGER
         tristate "Cryptographic algorithm manager"
         select CRYPTO_AEAD
@@ -689,6 +693,18 @@ config CRYPTO_LZO
         help
           This is the LZO algorithm.
 
+comment "Random Number Generation"
+
+config CRYPTO_ANSI_CPRNG
+        tristate "Pseudo Random Number Generation for Cryptographic modules"
+        select CRYPTO_AES
+        select CRYPTO_RNG
+        select CRYPTO_FIPS
+        help
+          This option enables the generic pseudo random number generator
+          for cryptographic modules.  Uses the Algorithm specified in
+          ANSI X9.31 A.2.4
+
 source "drivers/crypto/Kconfig"
 
 endif   # if CRYPTO