Function openssl_sys::BN_generate_prime_ex

pub unsafe extern "C" fn BN_generate_prime_ex(
    r: *mut BIGNUM, 
    bits: c_int, 
    safe: c_int, 
    add: *const BIGNUM, 
    rem: *const BIGNUM, 
    cb: *mut BN_GENCB
) -> c_int