Zero Entropy Source for testing. More...

Detailed Description

Zero Entropy Source for testing.

This module produces zeros only and should be used for testing purposes only.

Files
file	zero_entropy.h

Functions
int	entropy_source_zero_init (void)
	Initializes test structures, if tests are enabled.

int	entropy_source_zero_get (uint8_t *buf, size_t len)
	Generates zeros.

#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_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.

Function Documentation

◆ entropy_source_zero_get()

int entropy_source_zero_get	(	uint8_t *	buf,
		size_t	len
	)

Generates zeros.

Parameters

[out]	buf	pointer to write zeros to
[in]	len	number of bytes to generate

Returns: ENTROPY_SOURCE_OK on success; negative entropy_source_error_t code on error

◆ entropy_source_zero_init()

int entropy_source_zero_init ( void )

Initializes test structures, if tests are enabled.

Returns: ENTROPY_SOURCE_OK always