5a272b027a
This adds an implementation of Xoroshiro128+ PRNG, based on the original implementation at [1]. This pseudorandom number generator will use the entropy driver to obtain the seed. While it uses only 128 bits of state, it's pretty robust for non-crypto safe applications. [1] http://vigna.di.unimi.it/xorshift/xoroshiro128plus.c Signed-off-by: Leandro Pereira <leandro.pereira@intel.com>
62 lines
1.8 KiB
Plaintext
62 lines
1.8 KiB
Plaintext
# Kconfig - random configuration options
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#
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# Copyright (c) 2017 Intel Corporation
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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config TEST_RANDOM_GENERATOR
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bool
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prompt "Non-random number generator"
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depends on !ENTROPY_HAS_DRIVER
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default n
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help
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This option signifies that the kernel's random number APIs are
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permitted to return values that are not truly random.
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This capability is provided for testing purposes, when a truly random
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number generator is not available. The non-random number generator
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should not be used in a production environment.
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choice
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prompt "Random generator"
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default ENTROPY_DEVICE_RANDOM_GENERATOR
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config X86_TSC_RANDOM_GENERATOR
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bool
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prompt "x86 timestamp counter based number generator"
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depends on TEST_RANDOM_GENERATOR && X86
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help
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This options enables number generator based on timestamp counter
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of x86 boards, obtained with rdtsc instruction.
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config TIMER_RANDOM_GENERATOR
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bool
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prompt "System timer clock based number generator"
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depends on TEST_RANDOM_GENERATOR
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help
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This options enables number generator based on system timer
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clock. This number generator is not random and used for
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testing only.
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config ENTROPY_DEVICE_RANDOM_GENERATOR
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bool
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prompt "Use entropy driver to generate random numbers"
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depends on ENTROPY_HAS_DRIVER
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help
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Enables a random number generator that uses the enabled
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hardware entropy gathering driver to generate random
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numbers.
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config XOROSHIRO_RANDOM_GENERATOR
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bool
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prompt "Use Xoroshiro128+ as PRNG"
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depends on ENTROPY_HAS_DRIVER
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help
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Enables the Xoroshiro128+ pseudo-random number generator, that
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uses the entropy driver as a seed source. This is not a
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cryptographically secure random number generator.
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It is so named because it uses 128 bits of state.
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endchoice
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