/xlv3/openssl/0.9.7e-sgipl1/work/0.9.7e-sgipl1/openssl-
0.9.7e/doc/crypto
Page 1 (printed 10/20/05)
RAND_load_file(3) 21/Mar/2001 (0.9.7e) 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, size_t num);
int RAND_load_file(const char *filename, long max_bytes);
int RAND_write_file(const char *filename);
DESCRIPTION
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 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 VALUES
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.
SEE ALSO
rand(3), RAND_add(3), RAND_cleanup(3)
HISTORY
RAND_load_file(), RAND_write_file() and RAND_file_name() are
available in all versions of SSLeay and OpenSSL.
Page 1 (printed 10/20/05)
RAND_load_file(3) 21/Mar/2001 (0.9.7e) RAND_load_file(3)
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