RAND_SET_RAND_METHOD(3) | Library Functions Manual | RAND_SET_RAND_METHOD(3)

# NAME

`RAND_set_rand_method`, `RAND_get_rand_method`, `RAND_SSLeay` — select RAND method

# SYNOPSIS

library “libcrypto”
`#include <openssl/rand.h>`

int
`RAND_set_rand_method`(const RAND_METHOD *meth);

const RAND_METHOD *
`RAND_get_rand_method`(void);

RAND_METHOD *
`RAND_SSLeay`(void);

# DESCRIPTION

These functions used to allow for the random number generator functions to be replaced by arbitrary code.

They are kept for ABI compatibility but are no longer functional, and should not be used in new programs.

# RETURN VALUES

`RAND_set_rand_method`() always returns 1. `RAND_get_rand_method`() and `RAND_SSLeay`() always return `NULL`.

# HISTORY

`RAND_set_rand_method`(), `RAND_get_rand_method`(), and `RAND_SSLeay`() first appeared in SSLeay 0.9.1 and have been available since OpenBSD 2.6.

June 8, 2025 | Debian