Detailed Description

Macros
#define	CONFIG_ENTROPY_SOURCE_TESTS_WIN (512)
	Window size for Adaptive Proportion Test (NIST SP 800-90B 4.4.2).

#define	CONFIG_ENTROPY_SOURCE_NEUMANN_ABORT (5)
	Abort factor for von Neumann extractor.

#define	CONFIG_ENTROPY_SOURCE_ADC_RES ADC_RES_10BIT
	ADC resolution default configuration.

#define	CONFIG_ENTROPY_SOURCE_ADC_LINE ADC_LINE(0)
	ADC line default configuration.

#define	CONFIG_ENTROPY_SOURCE_ADC_HMIN (0)
	ADC estimated entropy per sample [2^16 * bit/sample].

#define	CONFIG_ENTROPY_SOURCE_ADC_HEALTH_TEST 0
	Disable ADC health test by default.

#define	CONFIG_ENTROPY_SOURCE_ADC_COND 0
	Disable ADC conditioning test by default.

#define	CONFIG_ENTROPY_SOURCE_ZERO_HMIN (58982)
	Min.

#define	CONFIG_ENTROPY_SOURCE_ZERO_HEALTH_TEST 1
	Enable health test by default.

#define	CONFIG_ENTROPY_SOURCE_ZERO_COND 0
	Disable conditioning by default.

Macro Definition Documentation

◆ CONFIG_ENTROPY_SOURCE_ADC_COND

#define CONFIG_ENTROPY_SOURCE_ADC_COND 0

Disable ADC conditioning test by default.

Definition at line 113 of file adc_noise.h.

◆ CONFIG_ENTROPY_SOURCE_ADC_HEALTH_TEST

#define CONFIG_ENTROPY_SOURCE_ADC_HEALTH_TEST 0

Disable ADC health test by default.

Definition at line 108 of file adc_noise.h.

◆ CONFIG_ENTROPY_SOURCE_ADC_HMIN

#define CONFIG_ENTROPY_SOURCE_ADC_HMIN (0)

ADC estimated entropy per sample [2^16 * bit/sample].

The entropy value needs to be estimated and evaluated thoroughly beforehand deployment! To avoid float, the actual entropy value per one byte sample needs to be manually multiplied by 2^16 before before configuring it (e.g., to an entropy value of 1 bit/sample, a value of 1 * 65536 needs to be set) . We default to zero which is an invalid configuration to enforce a thoughtful investigation on the actual entropy properties. See Entropy Sources for further information about entropy source validation. H_min=0 bit/sample * 2^16 is invalid and needs to set manually!

Definition at line 102 of file adc_noise.h.

◆ CONFIG_ENTROPY_SOURCE_ADC_LINE

#define CONFIG_ENTROPY_SOURCE_ADC_LINE ADC_LINE(0)

ADC line default configuration.

The ADC line maps to an I/O pin. This number acts as index to an array of predefined ADC devices that contain the pin definition. Typically, the array is defined by a board in a periph_conf.h file. Please note that a board is not required to specify a minimum number of lines.

Definition at line 81 of file adc_noise.h.

◆ CONFIG_ENTROPY_SOURCE_ADC_RES

#define CONFIG_ENTROPY_SOURCE_ADC_RES ADC_RES_10BIT

ADC resolution default configuration.

Definition at line 67 of file adc_noise.h.

◆ CONFIG_ENTROPY_SOURCE_NEUMANN_ABORT

#define CONFIG_ENTROPY_SOURCE_NEUMANN_ABORT (5)

Abort factor for von Neumann extractor.

The algorithms runs as long as no bit changes appear in subsequent samples. This define adds a factor that aborts the procedure after (factor * requested length) samples.

Definition at line 104 of file entropy_source.h.

◆ CONFIG_ENTROPY_SOURCE_TESTS_WIN

#define CONFIG_ENTROPY_SOURCE_TESTS_WIN (512)

Window size for Adaptive Proportion Test (NIST SP 800-90B 4.4.2).

In (NIST SP 800-90B 4.4.2) a window size of 512 samples is recommended for non-binary sources. Typically, RIOT use cases will not request as many samples, thus, it might be worth considering a smaller window size so the test is more likely to complete a cycle. It is noteworthy that a cutoff value calculated by entropy_source_test_prop_cutoff that is greater than the window size may lead to undetected errors.

Definition at line 94 of file entropy_source.h.

◆ CONFIG_ENTROPY_SOURCE_ZERO_COND

#define CONFIG_ENTROPY_SOURCE_ZERO_COND 0

Disable conditioning by default.

Conditioning is useless for zeros only. The von Neumann extractor would never finish and wait for the stop criterion given by CONFIG_ENTROPY_SOURCE_NEUMANN_ABORT.

Definition at line 64 of file zero_entropy.h.

◆ CONFIG_ENTROPY_SOURCE_ZERO_HEALTH_TEST

#define CONFIG_ENTROPY_SOURCE_ZERO_HEALTH_TEST 1

Enable health test by default.

Testing is the only purpose of this module.

Definition at line 53 of file zero_entropy.h.

◆ CONFIG_ENTROPY_SOURCE_ZERO_HMIN

#define CONFIG_ENTROPY_SOURCE_ZERO_HMIN (58982)

Min.

Entropy value for zero entropy module.

H_min=0.9 bit/sample * 2^16 fake for testing!

Definition at line 44 of file zero_entropy.h.