func (mk *MetaKey) Export(password, filename string) (err error) {
buf := new(bytes.Buffer)
err = mk.Write(buf)
if err != nil {
return
}
pk := hash.DeriveKey(password)
out := hash.New(buf.Bytes()).Digest()
out = append(out, buf.Bytes()...)
enc, err := armour.Encrypt(binaryKeyFromDerivedKey(pk), out, false)
if err != nil {
return
}
out = pk.Salt
out = append(out, enc...)
err = ioutil.WriteFile(filename, armour.EncodeBase64(out), 0644)
return
}
func (mk *MetaKey) Encrypt(algo int, msg []byte, armoured bool) (ct []byte, err error) {
var keySize int
switch algo {
case AES128:
keySize = AES128KeyLength
case AES192:
keySize = AES192KeyLength
case AES256:
keySize = AES256KeyLength
default:
return ct, ErrKeySizeNotSupported
}
key, err := mk.GetKey(keySize)
if err != nil {
return
}
return armour.Encrypt(key, msg, armoured)
}