Styjun

Spring Boot uses the properties file, and at least by default, the passwords are in plain text. Is it possible to somehow hide/decrypt these?

You can use Jasypt to encrypt properties, so you could have your property like this:

db.password=ENC(XcBjfjDDjxeyFBoaEPhG14wEzc6Ja+Xx+hNPrJyQT88=)

Jasypt allows you to encrypt your properties using different algorithms, once you get the encrypted property you put inside the ENC(...). For instance, you can encrypt this way through Jasypt using the terminal:

encrypted-pwd$ java -cp ~/.m2/repository/org/jasypt/jasypt/1.9.2/jasypt-1.9.2.jar org.jasypt.intf.cli.JasyptPBEStringEncryptionCLI input="contactspassword" password=supersecretz algorithm=PBEWithMD5AndDES

----ENVIRONMENT-----------------

Runtime: Oracle Corporation Java HotSpot(TM) 64-Bit Server VM 24.45-b08



----ARGUMENTS-------------------

algorithm: PBEWithMD5AndDES
input: contactspassword
password: supersecretz



----OUTPUT----------------------

XcBjfjDDjxeyFBoaEPhG14wEzc6Ja+Xx+hNPrJyQT88=

To easily configure it with Spring Boot you can use its starter jasypt-spring-boot-starter with group ID com.github.ulisesbocchio

Keep in mind, that you will need to start your application using the same password you used to encrypt the properties. So, you can start your app this way:

mvn -Djasypt.encryptor.password=supersecretz spring-boot:run

Or using the environment variable (thanks to spring boot relaxed binding):

export JASYPT_ENCRYPTOR_PASSWORD=supersecretz
mvn spring-boot:run

You can check below link for more details:

https://www.ricston.com/blog/encrypting-properties-in-spring-boot-with-jasypt-spring-boot/

To use your encrypted properties in your app just use it as usual, use either method you like (Spring Boot wires the magic, anyway the property must be of course in the classpath):

Using @Value annotation

@Value("$db.password")
private String password;

Or using Environment

@Autowired
private Environment environment;

public void doSomething(Environment env) 
 System.out.println(env.getProperty("db.password"));

Update: for production environment, to avoid exposing the password in the command line, since you can query the processes with ps, previous commands with history, etc etc. You could:

• Create a script like this: touch setEnv.sh
  


• Edit setEnv.sh to export the JASYPT_ENCRYPTOR_PASSWORD variable
  
  

  
  

  #!/bin/bash

  
  
  

  export JASYPT_ENCRYPTOR_PASSWORD=supersecretz

  
  

  
  


• Execute the file with . setEnv.sh
  


• Run the app in background with mvn spring-boot:run &
  


• Delete the file setEnv.sh
  


• Unset the previous environment variable with: unset JASYPT_ENCRYPTOR_PASSWORD
  

Spring Cloud Config Server will allow this type of behavior. Using JCE you can setup a key on the server and use it to cipher the apps properties.

http://cloud.spring.io/spring-cloud-config/spring-cloud-config.html

If you want to hide your passwords then the easiest solution is to use Environment variables in application.properties file or directly in your code.

In application.properties:

mypassword=$password

Then in your configuration class:

@Autowired
private Environment environment;

[...]//Inside a method
System.out.println(environment.getProperty("mypassword"));

In your configuration class:

@Value("$password")
private String herokuPath;

[...]//Inside a method
System.out.println(herokuPath);

Note: You might have to restart after setting environment variable.
For windows:

Refer this Documentation for more info.

To the already proposed solutions I can add an option to configure an external Secrets Manager such as Vault.

1. Configure Vault Server vault server -dev (Only for DEV and not for PROD)


2. Write secrets vault write secret/somename key1=value1 key2=value2
   


3. Verify secrets vault read secret/somename
   

Add the following dependency to your SpringBoot project:

<dependency>
 <groupId>org.springframework.cloud</groupId>
 <artifactId>spring-cloud-starter-vault-config</artifactId>
</dependency>

Add Vault config properties:

spring.cloud.vault.host=localhost
spring.cloud.vault.port=8200
spring.cloud.vault.scheme=http
spring.cloud.vault.authentication=token
spring.cloud.vault.token=$VAULT_TOKEN

Pass VAULT_TOKEN as an environment variable.

Refer to the documentation here.

There is a Spring Vault project which is also can be used for accessing, storing and revoking secrets.

Dependency:

<dependency>
 <groupId>org.springframework.vault</groupId>
 <artifactId>spring-vault-core</artifactId>
</dependency>

Configuring Vault Template:

@Configuration
class VaultConfiguration extends AbstractVaultConfiguration 

 @Override
 public VaultEndpoint vaultEndpoint() 
 return new VaultEndpoint();
 

 @Override
 public ClientAuthentication clientAuthentication() 
 return new TokenAuthentication("…");
 

Inject and use VaultTemplate:

public class Example 

 @Autowired
 private VaultOperations operations;

 public void writeSecrets(String userId, String password) 
 Map<String, String> data = new HashMap<String, String>();
 data.put("password", password);
 operations.write(userId, data);
 

 public Person readSecrets(String userId) 
 VaultResponseSupport<Person> response = operations.read(userId, Person.class);
 return response.getBody();
 

Use Vault PropertySource:

@VaultPropertySource(value = "aws/creds/s3",
 propertyNamePrefix = "aws."
 renewal = Renewal.RENEW)
public class Config 

Usage example:

public class S3Client 

 // inject the actual values
 @Value("$aws.access_key")
 private String awsAccessKey;
 @Value("$aws.secret_key")
 private String awsSecretKey;

 public InputStream getFileFromS3(String filenname) 
 // …