Function botan_sys::botan_pk_op_key_agreement

pub unsafe extern "C" fn botan_pk_op_key_agreement(
    op: botan_pk_op_ka_t, 
    out: *mut u8, 
    out_len: *mut usize, 
    other_key: *const u8, 
    other_key_len: usize, 
    salt: *const u8, 
    salt_len: usize
) -> c_int