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1 | =pod | ||
2 | |||
3 | =head1 NAME | ||
4 | |||
5 | RAND - pseudo-random number generator | ||
6 | |||
7 | =head1 SYNOPSIS | ||
8 | |||
9 | #include <openssl/rand.h> | ||
10 | |||
11 | int RAND_bytes(unsigned char *buf, int num); | ||
12 | int RAND_pseudo_bytes(unsigned char *buf, int num); | ||
13 | |||
14 | =head1 DESCRIPTION | ||
15 | |||
16 | These functions give access to the systems cryptographically secure | ||
17 | pseudo-random number generator (PRNG). It is used by other library functions | ||
18 | for example to generate random keys, and applications can use it when they | ||
19 | need randomness. | ||
20 | |||
21 | L<RAND_bytes(3)|RAND_bytes(3)> describes how to obtain random data from the | ||
22 | PRNG. | ||
23 | |||
24 | =head1 INTERNALS | ||
25 | |||
26 | The RAND_SSLeay() method implements a PRNG based on the systems' | ||
27 | L<arc4random_buf(3)> random number generator. | ||
28 | |||
29 | =head1 SEE ALSO | ||
30 | |||
31 | L<BN_rand(3)|BN_rand(3)>, | ||
32 | L<RAND_bytes(3)|RAND_bytes(3)> | ||
33 | |||
34 | =cut | ||