dffb8a67e3
Entropy pool gathers environmental noise from device drivers, user-space, etc., and returns good random numbers, suitable for cryptographic use. Based on entropy pool design from *BSDs and uses BLAKE2Xs algorithm for CSPRNG output. Patch also adds /dev/urandom support for using entropy pool RNG and new 'getrandom' system call for getting randomness without file-descriptor usage (thus avoiding file-descriptor exhaustion attacks). The 'getrandom' interface is similar as 'getentropy' and 'getrandom' available on OpenBSD and Linux respectively.
85 lines
2.0 KiB
Plaintext
85 lines
2.0 KiB
Plaintext
#
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# For a description of the syntax of this configuration file,
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# see the file kconfig-language.txt in the NuttX tools repository.
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#
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config CRYPTO
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bool "Crypto API support"
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default n
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---help---
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Enable or disable Crypto API features
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if CRYPTO
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config CRYPTO_AES
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bool "AES cypher support"
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default n
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config CRYPTO_ALGTEST
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bool "Perform automatic crypto algorithms test on startup"
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default n
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if CRYPTO_ALGTEST
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config CRYPTO_AES128_DISABLE
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bool "Omit 128-bit AES tests"
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default n
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config CRYPTO_AES192_DISABLE
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bool "Omit 192-bit AES tests"
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default n
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config CRYPTO_AES256_DISABLE
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bool "Omit 256-bit AES tests"
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default n
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endif # CRYPTO_ALGTEST
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config CRYPTO_CRYPTODEV
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bool "cryptodev support"
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default n
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config CRYPTO_SW_AES
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bool "Software AES library"
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default n
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---help---
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Enable the software AES library as described in
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include/nuttx/crypto/aes.h
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TODO: Adapt interfaces so that they are consistent with H/W AES
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implemenations. This needs to support up_aesinitialize() and
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aes_cypher() per include/nuttx/crypto/crypto.h.
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config CRYPTO_BLAKE2S
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bool "BLAKE2s hash algorithm"
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default n
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---help---
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Enable the BLAKE2s hash algorithm
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config CRYPTO_RANDOM_POOL
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bool "Entropy pool and strong randon number generator"
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default n
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select CRYPTO_BLAKE2S
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---help---
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Entropy pool gathers environmental noise from device drivers,
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user-space, etc., and returns good random numbers, suitable
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for cryptographic use. Based on entropy pool design from
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*BSDs and uses BLAKE2Xs algorithm for CSPRNG output.
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NOTE: May not actually be cyptographically secure, if
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not enough entropy is made available to the entropy pool.
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if CRYPTO_RANDOM_POOL
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config CRYPTO_RANDOM_POOL_COLLECT_IRQ_RANDOMNESS
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bool "Use interrupts to feed timing randomness to entropy pool"
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default y
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---help---
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Feed entropy pool with interrupt randomness from interrupt
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dispatch function 'irq_dispatch'. This adds some overhead
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for every interrupt handled.
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endif # CRYPTO_RANDOM_POOL
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endif # CRYPTO
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