[PATCH v3 0/2] crypto: jitter - SHA-3 conditioner and test interface

From: "Stephan Müller" <smueller@chronox.de>
To: linux-crypto@vger.kernel.org, herbert@gondor.apana.org.au
Cc: Vladis Dronov <vdronov@redhat.com>,
	Marcelo Cerri <marcelo.cerri@canonical.com>
Subject: [PATCH v3 0/2] crypto: jitter - SHA-3 conditioner and test interface
Date: Fri, 21 Apr 2023 08:07:39 +0200	[thread overview]
Message-ID: <2687238.mvXUDI8C0e@positron.chronox.de> (raw)
In-Reply-To: <4825604.31r3eYUQgx@positron.chronox.de>

The patch set replaces the LFSR conditioning function of the Jitter RNG
with SHA-3 256. This change requires also a new test interface to
analyze the raw unconditioned noise data.

Albeit the test interface can be used directly with dd, a small helper
tool is provided at [1] which can be used to perform the collection
of raw entropy. The analysis of the data can be done with your favorite
tool. Or you may use the helper in [2] which uses the NIST SP800-90B
tool for entropy rate measurement.

[1] https://github.com/smuellerDD/jitterentropy-library/tree/master/tests/raw-entropy/recording_runtime_kernelspace

[2] https://github.com/smuellerDD/jitterentropy-library/tree/master/tests/raw-entropy/validation-runtime-kernel

Changes v3:

- fix jent_kcapi_init: error code for jent_entropy_collector_alloc now
  properly cleans up the state

- fix jent_kcapi_init: initialize lock at the beginning as it is used in
  error code path function jent_kcapi_cleanup

- editorial change: update description in MODULE_PARM_DESC in patch 0002

Changes v2:

- fix use-after-free by switching shash_desc_zero and crypto_free_shash
  in jent_mod_init reported by kernel-test-robot

Stephan Mueller (2):
  crypto: jitter - replace LFSR with SHA3-256
  crypto: jitter - add interface for gathering of raw entropy

 crypto/Kconfig                 |  21 +++
 crypto/Makefile                |   1 +
 crypto/jitterentropy-kcapi.c   | 190 ++++++++++++++++++---
 crypto/jitterentropy-testing.c | 294 +++++++++++++++++++++++++++++++++
 crypto/jitterentropy.c         | 145 ++++++----------
 crypto/jitterentropy.h         |  20 ++-
 6 files changed, 551 insertions(+), 120 deletions(-)
 create mode 100644 crypto/jitterentropy-testing.c

-- 
2.40.0