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, 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 file-
       name and adds them to the PRNG. If max_bytes is non-neg-
       ative, 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 (cur-
       rently 1024) to file filename which can be used to ini-
       tialize 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.



0.9.7c                     2001-03-21         RAND_load_file(3)
