// Encrypt generates a random nonce and encrypts the input using
// NaCl's secretbox package. The nonce is prepended to the ciphertext.
func Encrypt(key *[KeySize]byte, in []byte) ([]byte, bool) {
var out = make([]byte, nonceSize)
nonce := util.NewNonce()
if nonce == nil {
return nil, false
}
copy(out, nonce[:])
out = secretbox.Seal(out, in, nonce, key)
return out, true
}
// encrypt the message without encoding it
func testEncryptBare(pub *PublicKey, message []byte) (out []byte, ok bool) {
if !pub.Valid() {
return nil, false
}
prng := util.PRNG()
epub, epriv, err := box.GenerateKey(prng)
if err != nil {
return nil, false
}
out = epub[:]
nonce := util.NewNonce()
out = append(out, nonce[:]...)
out = box.Seal(out, message, nonce, pub.E, epriv)
ok = true
return
}
// write the message two times to PT
func testEncryptTwo(pub *PublicKey, message []byte) (out []byte, ok bool) {
if !pub.Valid() {
return nil, false
}
prng := util.PRNG()
epub, epriv, err := box.GenerateKey(prng)
if err != nil {
return nil, false
}
enc := &tlv.Encoder{}
enc.Encode(message)
enc.Encode(message)
out = epub[:]
nonce := util.NewNonce()
out = append(out, nonce[:]...)
out = box.Seal(out, enc.Bytes(), nonce, pub.E, epriv)
ok = true
return
}