Encrypto password with Bcrypt in Java

Now, we learn how to encrypt the password in Java.

Using spring-security-crypto for Password Encryption

The spring-security-crypto library, part of the Spring Security project, offers various cryptographic functions, including password encryption. To integrate it into your Spring Boot project, add the following dependency to your pom.xml file:

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

Encrypting Passwords

Once you've added the dependency, you can use the PasswordEncoder interface provided by spring-security-crypto to encrypt passwords. Spring Security provides various implementations of PasswordEncoder, with BCryptPasswordEncoder being the most commonly used for password hashing.

Here's an example of how to use BCryptPasswordEncoder to encrypt a password:

import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;

public class PasswordEncryptionExample {

    public static void main(String[] args) {
        String password = "123456789";
        
        // Create an instance of BCryptPasswordEncoder
        BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
        
        // Encrypt the password
        String encryptedPassword = passwordEncoder.encode(password);
        
        // Print the encrypted password
        System.out.println("Encrypted Password: " + encryptedPassword);
    }
}

​For example, the result of encryptedPassword variable is:

​$2a$10$73iwHKtEb8zd25Kgn42.c.SWA6qRIu3ni1Q4fE19CBrXo31fluSuW

​Comparing password

​Now, I emulate the action of a user logging into the system.

public String Login()
{
	String passwordInDB = "$2a$10$73iwHKtEb8zd25Kgn42.c.SWA6qRIu3ni1Q4fE19CBrXo31fluSuW";
	String rawPassword= "123456789";
	BCryptPasswordEncoder bcrypt = new BCryptPasswordEncoder();
	if(bcrypt.matches(rawPassword, passwordInDB))
	{
		return "Login is successful";
	}
	return "Login is failed";
	
}

Conclusion

Encrypting passwords is essential for maintaining the security of user data in any application. In this blog post, we explored how to encrypt passwords in a Spring Boot application using the spring-security-crypto library. By integrating password encryption into your application, you can enhance its security and protect user information from unauthorized access.

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