func BoxOpenAfterNm(messageOut []byte, cypherText []byte, nonce, key []byte) int { checkSize(messageOut, len(cypherText), "message output") checkSize(nonce, BoxNonceBytes(), "nonce") checkSize(key, BoxBeforeNmBytes(), "key") return int(C.crypto_box_open_afternm( (*C.uchar)(&messageOut[0]), (*C.uchar)(&cypherText[0]), (C.ulonglong)(len(cypherText)), (*C.uchar)(&nonce[0]), (*C.uchar)(&key[0]))) }
func (b Boxer) Unbox(box []byte, nonce []byte) ([]byte, error) { result := make([]byte, C.crypto_box_BOXZEROBYTES+len(box)) copy(result[C.crypto_box_BOXZEROBYTES:], box) code := C.crypto_box_open_afternm(array(result), array(result), C.ulonglong(len(result)), array(nonce), array(b)) if code == 0 { return result[C.crypto_box_ZEROBYTES:], nil } else { return nil, ErrBoxOpen } }