BN_RAND(3) | Library Functions Manual | BN_RAND(3) |

`BN_rand`

, `BN_rand_range`

,
`BN_pseudo_rand`

,
`BN_pseudo_rand_range`

—
generate pseudo-random number

`#include <openssl/bn.h>`

`int`

`BN_rand`

(`BIGNUM *rnd`,
`int bits`, `int top`,
`int bottom`);

`int`

`BN_rand_range`

(`BIGNUM *rnd`,
`BIGNUM *range`);

`BN_rand`

() generates a cryptographically strong
pseudo-random number of `BN_rand_range`

() generates a
cryptographically strong pseudo-random number `rnd` in
the range 0 <= `rnd` <
`range`.

`BN_pseudo_rand`

() is a deprecated alias for
`BN_rand`

(), and
`BN_pseudo_rand_range`

() for
`BN_rand_range`

().

`BN_rand`

() first appeared in SSLeay 0.5.1 and has been
available since OpenBSD 2.4.
The `top` == -1 case and the function
`BN_rand_range`

() first appeared in OpenSSL 0.9.6a and
have been available since OpenBSD 3.0.

June 10, 2019 | OpenBSD-current |