@Override public KeyManager get() { return new FileBasedKeyManager(cConf, keyIdentifierCodec); } }
@Override public void doInit() throws IOException { File keyFile = new File(keyFilePath); String keyFileDirectory = keyFile.getParent(); File keyFileDir = new File(keyFileDirectory); // Create directory for keyfile if it doesn't exist already. if (!keyFileDir.exists() && !keyFileDir.mkdir()) { throw new IOException("Failed to create directory " + keyFileDirectory + " for keyfile storage."); } else { Preconditions.checkState(keyFileDir.isDirectory(), "Configured keyFile directory " + keyFileDirectory + " is not a directory!"); Preconditions.checkState(keyFileDir.canRead(), "Configured keyFile directory " + keyFileDirectory + " exists but is not readable!"); } // Read existing key from file. if (keyFile.exists()) { KeyIdentifier storedKey = keyIdentifierCodec.decode(Files.toByteArray(keyFile)); this.currentKey = storedKey; // the file-based key is considered valid forever allKeys.put(storedKey.getKeyId(), storedKey); } else { Preconditions.checkState(keyFileDir.canWrite(), "Configured keyFile directory " + keyFileDirectory + " exists but is not writable!"); // Create a new key and write to file. generateKey(); keyFile.createNewFile(); Files.write(keyIdentifierCodec.encode(currentKey), keyFile); } }