RAND crypto functions

Functions
void	RAND_seed (const void *indata, size_t size)
int	RAND_bytes (void *outdata, size_t size)
void	RAND_cleanup (void)
void	RAND_add (const void *indata, size_t size, double entropi)
int	RAND_pseudo_bytes (void *outdata, size_t size)
int	RAND_status (void)
int	RAND_set_rand_method (const RAND_METHOD *meth)
const RAND_METHOD *	RAND_get_rand_method (void)
int	RAND_set_rand_engine (ENGINE *engine)
int	RAND_load_file (const char *filename, size_t size)
int	RAND_write_file (const char *filename)
const char *	RAND_file_name (char *filename, size_t size)

---

Detailed Description

See the RAND - random number for description and examples.

---

Function Documentation

void RAND_add	(	const void *	indata,
		size_t	size,
		double	entropi
	)

Seed that random number generator. Secret material can securely be feed into the function, they will never be returned.

Parameters:

	indata	the input data.
	size	size of in data.
	entropi	entropi in data.

int RAND_bytes	(	void *	outdata,
		size_t	size
	)

Get a random block from the random generator, can be used for key material.

Parameters:

	outdata	random data
	size	length random data

Returns:

1 on success, 0 on failure.

void RAND_cleanup

(

void

)

Reset and free memory used by the random generator.

const char* RAND_file_name	(	char *	filename,
		size_t	size
	)

Return the default random state filename for a user to use for RAND_load_file(), and RAND_write_file().

Parameters:

	filename	buffer to hold file name.
	size	size of buffer filename.

Returns:

the buffer filename or NULL on failure.

const RAND_METHOD* RAND_get_rand_method

(

void

)

Get the default random method.

int RAND_load_file	(	const char *	filename,
		size_t	size
	)

Load a a file and feed it into RAND_seed().

Parameters:

	filename	name of file to read.
	size	minimum size to read.

int RAND_pseudo_bytes	(	void *	outdata,
		size_t	size
	)

Get a random block from the random generator, should NOT be used for key material.

Parameters:

	outdata	random data
	size	length random data

Returns:

1 on success, 0 on failure.

void RAND_seed	(	const void *	indata,
		size_t	size
	)

Seed that random number generator. Secret material can securely be feed into the function, they will never be returned.

Parameters:

	indata	seed data
	size	length seed data

int RAND_set_rand_engine

(

ENGINE *

engine

)

Set the default random method from engine.

Parameters:

engine

use engine, if NULL is passed it, old method and engine is cleared.

Returns:

1 on success, 0 on failure.

int RAND_set_rand_method

(

const RAND_METHOD *

meth

)

Set the default random method.

Parameters:

meth

set the new default method.

Returns:

1 on success.

int RAND_status

(

void

)

Return status of the random generator

Returns:

1 if the random generator can deliver random data.

int RAND_write_file

(

const char *

filename

)

Write of random numbers to a file to store for later initiation with RAND_load_file().

Parameters:

filename

name of file to write.

Returns:

1 on success and non-one on failure.