@Override
public void storeKey(Key key) throws KeyStoringException {
Path keyPath = FileSystemService.getUserRapidMinerDir().toPath().resolve(DEFAULTKEY_FILE_NAME);
try {
KeyGeneratorTool.storeKey(key.getEncoded(), keyPath);
} catch (IOException e) {
throw new KeyStoringException("Could not store new cipher key", e);
}
}
@Override
public SecretKey loadKey() throws KeyLoadingException {
// try to load key from file
File keyFile = new File(FileSystemService.getUserRapidMinerDir(), DEFAULTKEY_FILE_NAME);
try (FileInputStream fis = new FileInputStream(keyFile);
ObjectInputStream in = new ObjectInputStream(fis)) {
int length = in.readInt();
byte[] rawKey = new byte[length];
int actualLength = in.read(rawKey);
if (length != actualLength) {
throw new IOException("Cannot read key file (unexpected length)");
}
return KeyGeneratorTool.makeKey(rawKey);
} catch (IOException e) {
// catch to log the problem, then throw again to indicate error
LogService.getRoot()
.log(
Level.WARNING,
"com.rapidminer.tools.cipher.KeyGeneratorTool.read_key_error",
e.getMessage());
throw new KeyLoadingException("Cannot retrieve key: " + e.getMessage());
}
}