How to read an encrypted database password from application.properties in a spring boot application-CodePudding

I have an application.properties file in a Spring boot application which has the db Url, username, password and few other properties. The password is in an encrypted form. I have the decryption logic in a java function. How can I decrypt the password before Spring boot creates a datasource.

CodePudding user response：

You can use @Value annotation

@Value("${mypassword}")
private String encryptedPass;

then you can call the decryption function with the encryptedPass value

decryptionFun(encryptedPass);

This should return a string and you can use it an decrypted password .

For more information read the external config docs .

CodePudding user response：

You can do so by creating Datasource programmatically as below:-

@Configuration
public class DataSourceConfig {

@Autowired
private Environment environment;
    
    @Bean
    public DataSource getDataSource() {
        DataSourceBuilder dataSourceBuilder = DataSourceBuilder.create();
        dataSourceBuilder.driverClassName(environment.getProperty("spring.datasource.driver-class-name"));
        dataSourceBuilder.url(environment.getProperty("spring.datasource.url"));
        dataSourceBuilder.username("test");//environment.getProperty("spring.datasource.user")
        dataSourceBuilder.password(decryptPassword("encyptedPasswordFromPropertiesFile"));//environment.getProperty("spring.datasource.password")
        return dataSourceBuilder.build();
    }
}

Use your custom method to decrypt the password.

private String decryptPassword(String encycptedPassword)){
 // Decryption Logic
}