5 RAND_bytes, RAND_pseudo_bytes - generate random data
9 #include <openssl/rand.h>
11 int RAND_bytes(unsigned char *buf, int num);
15 #if OPENSSL_API_COMPAT < 0x10100000L
16 int RAND_pseudo_bytes(unsigned char *buf, int num);
21 RAND_bytes() puts B<num> cryptographically strong pseudo-random bytes
22 into B<buf>. An error occurs if the PRNG has not been seeded with
23 enough randomness to ensure an unpredictable byte sequence.
25 RAND_pseudo_bytes() has been deprecated; use RAND_bytes() instead.
27 The contents of B<buf> is mixed into the entropy pool before retrieving
28 the new pseudo-random bytes unless disabled at compile time (see FAQ).
32 RAND_bytes() returns 1 on success, -1 if not supported by the current
33 RAND method, or 0 on other failure. The error code can be
34 obtained by L<ERR_get_error(3)>.
38 RAND_pseudo_bytes() was deprecated in OpenSSL 1.1.0.
42 L<RAND_bytes(3)>, L<ERR_get_error(3)>,
47 Copyright 2000-2017 The OpenSSL Project Authors. All Rights Reserved.
49 Licensed under the OpenSSL license (the "License"). You may not use
50 this file except in compliance with the License. You can obtain a copy
51 in the file LICENSE in the source distribution or at
52 L<https://www.openssl.org/source/license.html>.