how to encrypt password in properties file in spring boot

To encrypt a password in a properties file in a Spring Boot application, you can follow these steps:

Step 1: Add Dependencies Add the necessary dependencies to your pom.xml file to use Spring Security and the required encryption libraries. For example, you can add the following dependencies:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-crypto</artifactId>
</dependency>

Step 2: Configure Encryption Algorithm In your application.properties or application.yml file, configure the encryption algorithm to be used for password encryption. You can specify it like this:

spring.security.user.password={bcrypt}$2a$10$yourBCryptHash

Replace {bcrypt}$2a$10$yourBCryptHash with the actual encrypted password. You can use a BCrypt encoder to generate this hash.

Step 3: Generate BCrypt Hash You can use a BCryptPasswordEncoder to generate a BCrypt hash for your password. You can do this in your Spring Boot application's configuration class. For example:

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

@Configuration
public class SecurityConfig {
    @Bean
    public BCryptPasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
}

Step 4: Encrypt the Password Now, you can encrypt your plain text password using the BCryptPasswordEncoder bean you created in the previous step. For example:

import org.springframework.security.crypto.password.PasswordEncoder;

public class PasswordEncryptionService {
    private final PasswordEncoder passwordEncoder;

    public PasswordEncryptionService(PasswordEncoder passwordEncoder) {
        this.passwordEncoder = passwordEncoder;
    }

    public String encryptPassword(String plainTextPassword) {
        return passwordEncoder.encode(plainTextPassword);
    }
}

Step 5: Use the Encrypted Password Finally, use the encrypted password in your application.properties or application.yml file as mentioned in Step 2.

That's it! You've configured password encryption for a Spring Boot application using BCrypt.