hcrypto_rand (3) - Linux Manuals

NAME

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_tsize, doubleentropi)

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_tsize)

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_tsize)

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_tsize)

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_tsize)

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_tsize)

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.

Author

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