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random: Change testing random generator

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The old random timer test was not random-looking
enough on some platforms.

Replace with new test which is psuedo-xoshiro.

The generator is still deterministic
and does not depend on entropy at all,
but should look more random for testing.

Change name of generator tree-wide also.

Signed-off-by: Declan Snyder <declan.snyder@nxp.com>
This commit is contained in:
Declan Snyder 2022-12-02 11:41:10 -06:00 • committed by Carles Cufí
commit d6881de3b3
8 changed files with 44 additions and 21 deletions
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4
subsys/random/CMakeLists.txt
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@ -1,7 +1,7 @@
# SPDX-License-Identifier: Apache-2.0
if (CONFIG_ENTROPY_DEVICE_RANDOM_GENERATOR OR
CONFIG_TIMER_RANDOM_GENERATOR OR
CONFIG_RANDOM_TEST_GENERATOR OR
CONFIG_XOSHIRO_RANDOM_GENERATOR)
zephyr_library()
zephyr_library_sources_ifdef(CONFIG_USERSPACE rand32_handlers.c)
@ -17,10 +17,10 @@ endif()
# XOROSHIRO builds the XOSHIRO implementation because a Kconfig choice cannot
# select another choice as a means of deprecating the symbol. Swapping out the
# implementation lets out-of-tree users still build until the symbol is removed.
zephyr_library_sources_ifdef(CONFIG_TIMER_RANDOM_GENERATOR rand32_timer.c)
zephyr_library_sources_ifdef(CONFIG_XOROSHIRO_RANDOM_GENERATOR rand32_xoshiro128.c)
zephyr_library_sources_ifdef(CONFIG_XOSHIRO_RANDOM_GENERATOR rand32_xoshiro128.c)
zephyr_library_sources_ifdef(CONFIG_CTR_DRBG_CSPRNG_GENERATOR rand32_ctr_drbg.c)
zephyr_library_sources_ifdef(CONFIG_RANDOM_TEST_GENERATOR rand32_test.c)
if (CONFIG_ENTROPY_DEVICE_RANDOM_GENERATOR OR CONFIG_HARDWARE_DEVICE_CS_GENERATOR)
zephyr_library_sources(rand32_entropy_device.c)