NAME
RAND_file_name
,
RAND_load_file
,
RAND_write_file
—
PRNG seed file
SYNOPSIS
#include
<openssl/rand.h>
const char *
RAND_file_name
(char *buf,
size_t num);
int
RAND_load_file
(const char
*filename, long max_bytes);
int
RAND_write_file
(const char
*filename);
DESCRIPTION
RAND_file_name
()
returns a default path for the random seed file. buf
points to a buffer of size num in which to store the
filename. If num is too small for the path name, an
error occurs.
RAND_load_file
()
used to allow for the state of the random number generator to be controlled
by external sources. It is kept for ABI compatibility but is no longer
functional, and should not be used in new programs.
RAND_write_file
()
writes a number of random bytes (currently 1024) to file
filename.
RETURN VALUES
RAND_load_file
() returns
max_bytes, or a bogus positive value if
max_bytes is -1.
RAND_write_file
() returns the number of
bytes written, or a number less than or equal to 1 if an error occurs.
RAND_file_name
() returns a pointer to
buf on success or NULL
on
error.
HISTORY
RAND_load_file
(),
RAND_write_file
(), and
RAND_file_name
() first appeared in SSLeay 0.5.1 and
have been available since OpenBSD 2.4.