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encryption in logstash pipeline

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I have below code in java, which encrypting input data using AES

SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");        KeySpec spec = new PBEKeySpec(secretKey.toCharArray(), salt.getBytes(), 65536, 256);        SecretKey secret = new SecretKeySpec(factory.generateSecret(spec).getEncoded(), "AES");        if (data == null)            return encryptedText;        Cipher encryptCipher = Cipher.getInstance("AES/GCM/NoPadding");        // get IV        byte[] iv = getRandomNonce(12);        encryptCipher.init(Cipher.ENCRYPT_MODE, secret, new GCMParameterSpec(128, iv));        // encrypted data:        byte[] encryptedBytes = encryptCipher.doFinal(data.getBytes("UTF-8"));        // prefix IV and Salt to cipher text        byte[] cipherTextWithIvSalt = ByteBuffer.allocate(iv.length + salt.length() + encryptedBytes.length).put(iv)                .put(salt.getBytes()).put(encryptedBytes).array();        encryptedText = Base64.getEncoder().encodeToString(cipherTextWithIvSalt);

I have logstash pipeline where for encryption i'm trying with below code in ruby, however it is not working

  ruby {code => "  require 'openssl'  require 'base64'  password = 'secret_key'  salt = 'random_salt'  iterations = 65536  key_len = OpenSSL::Cipher.new('aes-256-gcm').key_len  key = OpenSSL::PKCS5.pbkdf2_hmac(password, salt, iterations, key_len, 'sha256')  cipher = OpenSSL::Cipher.new('aes-256-gcm')  cipher.encrypt  cipher.key = key  iv = Random.new.bytes(12)  encrypted = cipher.update(event.get('secret')) + cipher.final  length=iv.length+salt.length+encrypted.length    // buffer =IO::Buffer.new(10)// not working  encrypted_text = Base64.encode64(buffer).strip  event.set('message_encrypted', encrypted_text)"add_field => {"new_secret" => "%{[message_encrypted]}"    }

}

Can someone help to figure out the missing part in the code?


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