func (b Boxer) Box(message []byte, nonce []byte) []byte {
result := make([]byte, C.crypto_box_ZEROBYTES+len(message))
copy(result[C.crypto_box_ZEROBYTES:], message)
C.crypto_box_afternm(array(result), array(result), C.ulonglong(len(result)), array(nonce), array(b))
return result[C.crypto_box_BOXZEROBYTES:]
}
func BoxAfterNm(cypherTextOut []byte, message []byte, nonce, key []byte) int {
checkSize(cypherTextOut, len(message), "cypher text output")
checkSize(nonce, BoxNonceBytes(), "nonce")
checkSize(key, BoxBeforeNmBytes(), "intermediate key")
return int(C.crypto_box_afternm((*C.uchar)(&cypherTextOut[0]),
(*C.uchar)(&message[0]), (C.ulonglong)(len(message)),
(*C.uchar)(&nonce[0]),
(*C.uchar)(&key[0])))
}
func CryptoBoxOpenAfteNm(c []byte, n []byte, k []byte) ([]byte, int) {
support.CheckSize(n, CryptoBoxNonceBytes(), "nonce")
support.CheckSize(k, CryptoBoxBeforeNmBytes(), "shared secret key")
m := make([]byte, len(c))
exit := int(C.crypto_box_afternm(
(*C.uchar)(&m[0]),
(*C.uchar)(&c[0]),
(C.ulonglong)(len(c)),
(*C.uchar)(&n[0]),
(*C.uchar)(&k[0])))
return m, exit
}