Simple Password Encryption using Spring Boot

Question

1. Below is my Bean class

    package com.naveen.entity;

    import org.springframework.context.annotation.Bean;

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

    public String encode(String passWord) {
        // TODO Auto-generated method stub
        return null;
    }

}

2. Then, I've created BCryptPasswordEncoder. java class as below,

    package com.naveen.entity;
    import org.springframework.stereotype.Component;
    @Component
    public class BCryptPasswordEncoder extends PasswordEncoder {

    }

3. Then, I've autowired my Controller class & I've added encryption function in my saveUser() as below,

    public class UserController {

    @Autowired 
    PasswordEncoder passwordEncoder;
    @PostMapping("/saveUser")
    public int saveUser(@RequestBody User user) throws Exception {
    
        
        String encryptedPassword =passwordEncoder.encode(user.getPassWord());
           user.setPassWord(encryptedPassword);
    userService.saveUser(user);
        System.out.println("Inserted data with id: "+ user.getId());
     return 1;
     }

4. Service class as follows,

        @Service
    public class UserServiceImpl implements UserService {
    
        @Autowired
        private UserMapper userMapper;
        @Override
        public void saveUser(User user) {
            userMapper.saveUser(user);
        } }

When I run the code, I got the error below, Field passwordEncoder in com.naveen.controller.UserController required a bean of type 'com.naveen.entity.PasswordEncoder' that could not be found. The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true) Action: Consider defining a bean of type 'com.naveen.entity.PasswordEncoder' in your configuration.

Please help me out to resolve where I went wrong.

Answer 1

You would need to add @Component annotation to BCryptPasswordEncoder class

import org.springframework.stereotype.Component;

@Component
public class BCryptPasswordEncoder extends PasswordEncoder{

}

It would work then.

Answer 2

Adding to PumpkinX's answer put your statements in this order:

     String encryptedPassword =passwordEncoder.encode(user.getPassWord());
     user.setPassWord(encryptedPassword);
     userService.saveUser(user);
     System.out.println("Inserted data with id: "+ user.getId());

Notice, userService.saveUser(user); after you read and encode the data? Since you had this statement of top it was causing it to have null value.

Answer 3

I know I am late on this. But you are missing the implementation of the encode function.

Just replace the encode function with the below.

public String encode(String passWord) {
    BCryptPasswordEncoder bCryptPasswordEncoder =
            new BCryptPasswordEncoder(10, new SecureRandom());
    return bCryptPasswordEncoder.encode(passWord);

}

This will encrypt the password instead of returning the null value.