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tests: random: Move and rename rng test

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Random number generator is a subsystem and although it is mostly used
in crypto, this is not its only utility.

Move the current random number generator test to it is own space
(tests/subsys/random) and rename it to rng.

We need more and better tests for rng, this is an initial commit
to organize it and get ready for further tests.

Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
This commit is contained in:
Flavio Ceolin 2024-05-15 14:09:39 -07:00 • committed by David Leach
commit 8c5806472e
9 changed files with 7 additions and 7 deletions
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15
tests/crypto/rand32/CMakeLists.txt
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@ -1,15 +0,0 @@
# SPDX-License-Identifier: Apache-2.0
cmake_minimum_required(VERSION 3.20.0)
find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
project(rand32)
zephyr_library_include_directories(${ZEPHYR_BASE}/kernel/include/)
FILE(GLOB app_sources src/*.c)
target_sources(app PRIVATE ${app_sources})
target_include_directories(app PRIVATE
${ZEPHYR_BASE}/kernel/include
${ZEPHYR_BASE}/arch/${ARCH}/include
)

16
tests/crypto/rand32/entropy_psa_crypto.overlay
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@ -1,16 +0,0 @@
/*
* Copyright (c) 2022 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
/ {
chosen {
zephyr,entropy = &psa_rng;
};
psa_rng: psa-rng {
compatible = "zephyr,psa-crypto-rng";
status = "okay";
};
};

4
tests/crypto/rand32/prj.conf
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@ -1,4 +0,0 @@
CONFIG_ZTEST=y
CONFIG_LOG=y
CONFIG_ENTROPY_GENERATOR=y
CONFIG_TEST_RANDOM_GENERATOR=y

3
tests/crypto/rand32/prj_ctr_drbg.conf
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@ -1,3 +0,0 @@
CONFIG_ZTEST=y
CONFIG_LOG=y
CONFIG_ENTROPY_GENERATOR=y

7
tests/crypto/rand32/prj_hw_random_psa_crypto.conf
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@ -1,7 +0,0 @@
CONFIG_ZTEST=y
CONFIG_LOG=y
CONFIG_ENTROPY_GENERATOR=y
CONFIG_HARDWARE_DEVICE_CS_GENERATOR=y
CONFIG_TFM_PARTITION_CRYPTO=y
CONFIG_TFM_CRYPTO_RNG_MODULE_ENABLED=y
CONFIG_ENTROPY_PSA_CRYPTO_RNG=y

4
tests/crypto/rand32/prj_hw_random_xoshiro.conf
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@ -1,4 +0,0 @@
CONFIG_ZTEST=y
CONFIG_LOG=y
CONFIG_ENTROPY_GENERATOR=y
CONFIG_XOSHIRO_RANDOM_GENERATOR=y

5
tests/crypto/rand32/prj_sw_random_systimer.conf
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@ -1,5 +0,0 @@
CONFIG_ZTEST=y
CONFIG_LOG=y
CONFIG_ENTROPY_GENERATOR=y
CONFIG_TEST_RANDOM_GENERATOR=y
CONFIG_TIMER_RANDOM_GENERATOR=y

118
tests/crypto/rand32/src/main.c
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@ -1,118 +0,0 @@
/* test random number generator APIs */
/*
* Copyright (c) 2016 Intel Corporation
*
* SPDX-License-Identifier: Apache-2.0
*/
/*
* This tests the following random number routines:
* void z_early_rand_get(uint8_t *buf, size_t length)
* uint32_t sys_rand32_get(void);
*/
#include <zephyr/ztest.h>
#include <kernel_internal.h>
#include <zephyr/random/random.h>
#define N_VALUES 10
/**
*
* @brief Regression test's entry point
*
*/
ZTEST(rand32_common, test_rand32)
{
uint32_t gen, last_gen, tmp;
int rnd_cnt;
int equal_count = 0;
uint32_t buf[N_VALUES];
/* Test early boot random number generation function */
/* Cover the case, where argument "length" is < size of "size_t" */
z_early_rand_get((uint8_t *)&tmp, (size_t)1);
z_early_rand_get((uint8_t *)&last_gen, sizeof(last_gen));
z_early_rand_get((uint8_t *)&gen, sizeof(gen));
zassert_true(last_gen != gen && last_gen != tmp && tmp != gen,
"z_early_rand_get failed");
/*
* Test subsequently calls sys_rand32_get(), checking
* that two values are not equal.
*/
printk("Generating random numbers\n");
last_gen = sys_rand32_get();
/*
* Get several subsequent numbers as fast as possible.
* Based on review comments in
* https://github.com/zephyrproject-rtos/zephyr/pull/5066
* If minimum half of the numbers generated were the same
* as the previously generated one, then test fails, this
* should catch a buggy sys_rand32_get() function.
*/
for (rnd_cnt = 0; rnd_cnt < (N_VALUES - 1); rnd_cnt++) {
gen = sys_rand32_get();
if (gen == last_gen) {
equal_count++;
}
last_gen = gen;
}
if (equal_count > N_VALUES / 2) {
zassert_false((equal_count > N_VALUES / 2),
"random numbers returned same value with high probability");
}
printk("Generating bulk fill random numbers\n");
memset(buf, 0, sizeof(buf));
sys_rand_get((uint8_t *)(&buf[0]), sizeof(buf));
for (rnd_cnt = 0; rnd_cnt < (N_VALUES - 1); rnd_cnt++) {
gen = buf[rnd_cnt];
if (gen == last_gen) {
equal_count++;
}
last_gen = gen;
}
if (equal_count > N_VALUES / 2) {
zassert_false((equal_count > N_VALUES / 2),
"random numbers returned same value with high probability");
}
#if defined(CONFIG_CSPRNG_ENABLED)
printk("Generating bulk fill cryptographically secure random numbers\n");
memset(buf, 0, sizeof(buf));
int err = sys_csrand_get(buf, sizeof(buf));
zassert_true(err == 0, "sys_csrand_get returned an error");
for (rnd_cnt = 0; rnd_cnt < (N_VALUES - 1); rnd_cnt++) {
gen = buf[rnd_cnt];
if (gen == last_gen) {
equal_count++;
}
last_gen = gen;
}
if (equal_count > N_VALUES / 2) {
zassert_false((equal_count > N_VALUES / 2),
"random numbers returned same value with high probability");
}
#else
printk("Cryptographically secure random number APIs not enabled\n");
#endif /* CONFIG_CSPRNG_ENABLED */
}
ZTEST_SUITE(rand32_common, NULL, NULL, NULL, NULL, NULL);

36
tests/crypto/rand32/testcase.yaml
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@ -1,36 +0,0 @@
common:
tags:
- crypto
- random
- security
tests:
crypto.rand32:
min_ram: 16
integration_platforms:
- qemu_x86
crypto.rand32.random_sw_systimer:
extra_args: CONF_FILE=prj_sw_random_systimer.conf
integration_platforms:
- qemu_x86
crypto.rand32.random_hw_xoshiro:
extra_args: CONF_FILE=prj_hw_random_xoshiro.conf
filter: CONFIG_ENTROPY_HAS_DRIVER
min_ram: 16
integration_platforms:
- native_sim
crypto.rand32.random_ctr_drbg:
extra_args: CONF_FILE=prj_ctr_drbg.conf
filter: CONFIG_ENTROPY_HAS_DRIVER
min_ram: 16
integration_platforms:
- native_sim
drivers.rand32.random_psa_crypto:
filter: CONFIG_BUILD_WITH_TFM
arch_exclude: posix
extra_args:
- DTC_OVERLAY_FILE=./entropy_psa_crypto.overlay
- CONF_FILE=prj_hw_random_psa_crypto.conf
tags:
- psa-crypto
integration_platforms:
- nrf5340dk/nrf5340/cpuapp/ns