func (n naclBoxSecretKey) Box(
receiver saltpack.BoxPublicKey, nonce *saltpack.Nonce, msg []byte) []byte {
ret := box.Seal([]byte{}, msg, (*[24]byte)(nonce),
(*[32]byte)(receiver.ToRawBoxKeyPointer()),
(*[32]byte)(n.Private))
return ret
}
// Unbox runs the NaCl unbox operation on the given ciphertext and nonce,
// using the receiver as the secret key.
func (k SecretKey) Unbox(sender saltpack.BoxPublicKey, nonce *saltpack.Nonce, msg []byte) ([]byte, error) {
ret, ok := box.Open([]byte{}, msg, (*[24]byte)(nonce), (*[32]byte)(sender.ToRawBoxKeyPointer()), (*[32]byte)(&k.sec))
if !ok {
return nil, saltpack.ErrDecryptionFailed
}
return ret, nil
}
func (n naclBoxSecretKey) Precompute(
sender saltpack.BoxPublicKey) saltpack.BoxPrecomputedSharedKey {
var res naclBoxPrecomputedSharedKey
box.Precompute((*[32]byte)(&res),
(*[32]byte)(sender.ToRawBoxKeyPointer()),
(*[32]byte)(n.Private))
return res
}
func (n naclBoxSecretKey) Unbox(
sender saltpack.BoxPublicKey, nonce *saltpack.Nonce, msg []byte) (
[]byte, error) {
ret, ok := box.Open([]byte{}, msg, (*[24]byte)(nonce),
(*[32]byte)(sender.ToRawBoxKeyPointer()),
(*[32]byte)(n.Private))
if !ok {
return nil, DecryptionError{}
}
return ret, nil
}
// Precompute computes a shared key with the passed public key.
func (k SecretKey) Precompute(sender saltpack.BoxPublicKey) saltpack.BoxPrecomputedSharedKey {
var res PrecomputedSharedKey
box.Precompute((*[32]byte)(&res), (*[32]byte)(sender.ToRawBoxKeyPointer()), (*[32]byte)(&k.sec))
return res
}