pub unsafe extern "C" fn nettle_ccm_aes192_decrypt_message(
    ctx: *mut ccm_aes192_ctx,
    nlength: usize,
    nonce: *const u8,
    alength: usize,
    adata: *const u8,
    tlength: usize,
    mlength: usize,
    dst: *mut u8,
    src: *const u8
) -> c_int