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RAND_LOAD_FILE(3)
Contents
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RAND_load_file, RAND_write_file, RAND_file_name - PRNG
seed file
#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);
RAND_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 file-
name 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.
RAND_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.
rand(3), RAND_add(3), RAND_cleanup(3)
RAND_load_file(), RAND_write_file() and RAND_file_name()
are available in all versions of SSLeay and OpenSSL.
OpenBSD 3.6 2001-06-21 1 [ Back ] |