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=pod
=head1 NAME
rand - pseudo-random number generator
=head1 SYNOPSIS
#include <openssl/rand.h>
int RAND_bytes(unsigned char *buf, int num);
int RAND_pseudo_bytes(unsigned char *buf, int num);
=head1 DESCRIPTION
These functions give access to the systems cryptographically secure
pseudo-random number generator (PRNG). It is used by other library functions
for example to generate random keys, and applications can use it when they
need randomness.
L<RAND_bytes(3)|RAND_bytes(3)> describes how to obtain random data from the
PRNG.
=head1 INTERNALS
The RAND_SSLeay() method implements a PRNG based on the systems'
L<arc4random_buf(3)> random number generator.
=head1 SEE ALSO
L<BN_rand(3)|BN_rand(3)>,
L<RAND_bytes(3)|RAND_bytes(3)>
=cut
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