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authorStephan Mueller <smueller@chronox.de>2015-05-25 15:10:20 +0200
committerHerbert Xu <herbert@gondor.apana.org.au>2015-05-27 17:51:54 +0800
commitbb5530e4082446aac3a3d69780cd4dbfa4520013 (patch)
tree4303ec9cfc45093ae835d642b043413965c1ce84 /crypto/Kconfig
parentb8ec5ba42c4a3854e27c44e697d9b4f0b84b32bb (diff)
downloadlinux-stericsson-bb5530e4082446aac3a3d69780cd4dbfa4520013.tar.gz
crypto: jitterentropy - add jitterentropy RNG
The CPU Jitter RNG provides a source of good entropy by collecting CPU executing time jitter. The entropy in the CPU execution time jitter is magnified by the CPU Jitter Random Number Generator. The CPU Jitter Random Number Generator uses the CPU execution timing jitter to generate a bit stream which complies with different statistical measurements that determine the bit stream is random. The CPU Jitter Random Number Generator delivers entropy which follows information theoretical requirements. Based on these studies and the implementation, the caller can assume that one bit of data extracted from the CPU Jitter Random Number Generator holds one bit of entropy. The CPU Jitter Random Number Generator provides a decentralized source of entropy, i.e. every caller can operate on a private state of the entropy pool. The RNG does not have any dependencies on any other service in the kernel. The RNG only needs a high-resolution time stamp. Further design details, the cryptographic assessment and large array of test results are documented at http://www.chronox.de/jent.html. CC: Andreas Steffen <andreas.steffen@strongswan.org> CC: Theodore Ts'o <tytso@mit.edu> CC: Sandy Harris <sandyinchina@gmail.com> Signed-off-by: Stephan Mueller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
-rw-r--r--crypto/Kconfig10
1 files changed, 10 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index b7088d138723..af011a96e97d 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1489,9 +1489,19 @@ config CRYPTO_DRBG
tristate
default CRYPTO_DRBG_MENU if (CRYPTO_DRBG_HMAC || CRYPTO_DRBG_HASH || CRYPTO_DRBG_CTR)
select CRYPTO_RNG
+ select CRYPTO_JITTERENTROPY
endif # if CRYPTO_DRBG_MENU
+config CRYPTO_JITTERENTROPY
+ tristate "Jitterentropy Non-Deterministic Random Number Generator"
+ help
+ The Jitterentropy RNG is a noise that is intended
+ to provide seed to another RNG. The RNG does not
+ perform any cryptographic whitening of the generated
+ random numbers. This Jitterentropy RNG registers with
+ the kernel crypto API and can be used by any caller.
+
config CRYPTO_USER_API
tristate