NAME
RAND_bytes,
RAND_pseudo_bytes —
generate random data
SYNOPSIS
#include
<openssl/rand.h>
int
RAND_bytes(unsigned char *buf,
int num);
int
RAND_pseudo_bytes(unsigned char
*buf, int num);
DESCRIPTION
These functions are deprecated and only retained for compatibility with legacy application programs. Use arc4random_buf(3) instead.
RAND_bytes()
puts num cryptographically strong pseudo-random bytes
into buf.
RAND_pseudo_bytes()
puts num pseudo-random bytes into
buf. Pseudo-random byte sequences generated by
RAND_pseudo_bytes() will be unique if they are of
sufficient length, but are not necessarily unpredictable. They can be used
for non-cryptographic purposes and for certain purposes in cryptographic
protocols, but usually not for key generation etc.
RETURN VALUES
RAND_bytes() returns 1.
RAND_pseudo_bytes() returns 1.
HISTORY
RAND_bytes() is available in all versions
of SSLeay and OpenSSL. It has a return value since OpenSSL 0.9.5.
RAND_pseudo_bytes() was added in OpenSSL 0.9.5.