RAND_load_file, RAND_write_file, RAND_file_name - PRNG seed file
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);
generates a default path for the random seed file.
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.
reads a number of bytes from file filename
adds them to the PRNG. If max_bytes
is non-negative, up to to
are read; starting with OpenSSL 0.9.5, if max_bytes
-1, the complete file is read.
writes a number of random bytes (currently 1024) to
which can be used to initialize the PRNG by calling
in a later session.
returns the number of bytes read.
returns the number of bytes written, and -1 if the
bytes written were generated without appropriate seed.
returns a pointer to buf
on success, and NULL on
are available in all versions of SSLeay and OpenSSL.