RAND_load_file(3) OpenSSL RAND_load_file(3)NAME
RAND_load_file, RAND_write_file, RAND_file_name - PRNG
seed file
SYNOPSIS
#include <openssl/rand.h>
const char *RAND_file_name(char *buf, int num);
int RAND_load_file(const char *filename, long max_bytes);
int RAND_write_file(const char *filename);
DESCRIPTIONRAND_file_name() generates a default path for the random
seed file. buf points to a buffer of size num in which to
store the filename. The seed file is $RANDFILE if that
environment variable is set, $HOME/.rnd otherwise. If
$HOME is not set either, or num is too small for the path
name, an error occurs.
RAND_load_file() reads a number of bytes from file
filename and adds them to the PRNG. If max_bytes is non-
negative, up to to max_bytes are read; starting with
OpenSSL 0.9.5, if max_bytes is -1, the complete file is
read.
RAND_write_file() writes a number of random bytes
(currently 1024) to file filename which can be used to
initialize the PRNG by calling RAND_load_file() in a later
session.
RETURN VALUESRAND_load_file() returns the number of bytes read.
RAND_write_file() returns the number of bytes written, and
-1 if the bytes written were generated without appropriate
seed.
RAND_file_name() returns a pointer to buf on success, and
NULL on error.
SEE ALSOrand(3), RAND_add(3), RAND_cleanup(3)HISTORYRAND_load_file(), RAND_write_file() and RAND_file_name()
are available in all versions of SSLeay and OpenSSL.
16/Aug/2000 0.9.6 1
RAND_load_file(3) OpenSSL RAND_load_file(3)16/Aug/2000 0.9.6 2
