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RAND_egd(3)
NAME
RAND_egd - query entropy gathering daemon
SYNOPSIS
#include <openssl/rand.h>
int RAND_egd(const char *path);
DESCRIPTION
RAND_egd() queries the entropy gathering daemon EGD on socket path.
EGD is available from http://www.lothar.com/tech/crypto/
(perl
Makefile.PL; make; make install to install). It is run as egd
path, where path is an absolute path designating a socket. When RAND_egd() is
called with that path as an argument, it tries to read random bytes that
EGD has collected. The read is performed in non-blocking mode.
Alternatively, the EGD-compatible daemon PRNGD can be used. It is available from http://www.aet.tu-cottbus.de/personen/jaenicke/postfix_tls/prngd.html .
RETURN VALUE
RAND_egd() returns the number of bytes read from the daemon on
success, and -1 if the connection failed or the daemon did not return
enough data to fully seed the PRNG.
SEE ALSO
rand(3), RAND_add(3), RAND_cleanup(3)
HISTORY
RAND_egd() is available since OpenSSL 0.9.5.
