Hands-On Serverless Applications with Kotlin

 Boilerplate decryption

In the preceding screenshot, we can get the boilerplate code that aids us with this decryption. The following code block shows it adapted for our use case:

private String decryptKey(String keyName) {        System.out.println("Decrypting key");        byte[] encryptedKey = Base64.decode(System.getenv(keyName));        AWSKMS client = AWSKMSClientBuilder.defaultClient();        DecryptRequest request = new DecryptRequest()                .withCiphertextBlob(ByteBuffer.wrap(encryptedKey));        ByteBuffer plainTextKey = client.decrypt(request).getPlaintext();        return new String(plainTextKey.array(), Charset.forName("UTF-8"));    }