pub unsafe extern "C" fn x509write_csr_der( ctx: *mut x509write_csr, buf: *mut c_uchar, size: size_t, f_rng: Option<unsafe extern "C" fn(arg1: *mut c_void, arg2: *mut c_uchar, arg3: size_t) -> c_int>, p_rng: *mut c_void) -> c_int
