Commit bb5530e4 authored by Stephan Mueller's avatar Stephan Mueller Committed by Herbert Xu

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: default avatarStephan Mueller <smueller@chronox.de>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent b8ec5ba4
......@@ -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
......
......@@ -95,6 +95,8 @@ obj-$(CONFIG_CRYPTO_RNG2) += rng.o
obj-$(CONFIG_CRYPTO_RNG2) += krng.o
obj-$(CONFIG_CRYPTO_ANSI_CPRNG) += ansi_cprng.o
obj-$(CONFIG_CRYPTO_DRBG) += drbg.o
CFLAGS_jitterentropy.o = -O0
obj-$(CONFIG_CRYPTO_JITTERENTROPY) += jitterentropy.o
obj-$(CONFIG_CRYPTO_TEST) += tcrypt.o
obj-$(CONFIG_CRYPTO_GHASH) += ghash-generic.o
obj-$(CONFIG_CRYPTO_USER_API) += af_alg.o
......
This diff is collapsed.
......@@ -3105,6 +3105,10 @@ static const struct alg_test_desc alg_test_descs[] = {
.count = HMAC_SHA512_TEST_VECTORS
}
}
}, {
.alg = "jitterentropy_rng",
.fips_allowed = 1,
.test = alg_test_null,
}, {
.alg = "lrw(aes)",
.test = alg_test_skcipher,
......
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment