Spring boot how make a user role managing with jwt

Question

I\'m writing a RESTful api with spring boot. I\'m using spring boot, jersey, mongo db, swagger, spring boot security and jwt.

I have written the models, the reposito

Answer 1

First need to add the roles inside the JWT. For that you can add as Claim in the JWT Generator class.

    public String generateToken(UserDetails userDetails) {
        Map<String, Object> claims = new HashMap<>();
        Set<String> Userroles = new HashSet<>();
        User user = userRepository.findByUsername(userDetails.getUsername());
        for(Role role:user.getRoles()){
            Userroles.add(role.getName());
        }
        claims.put("Roles",Userroles.toArray());
        return createToken(claims, userDetails.getUsername());
    }

    private String createToken(Map<String, Object> claims, String subject) {
        
        return Jwts.builder().setClaims(claims).setSubject(subject).setIssuedAt(new Date(System.currentTimeMillis()))
                .setExpiration(new Date(System.currentTimeMillis() + 1000 * 60 * 60 * 10))
                .signWith(SignatureAlgorithm.HS256, SECRET_KEY).compact();
    }

In the user model class need to include the roles in Set or any other data structure.

 @ManyToMany(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
    @JoinTable(name = "USER_ROLES", joinColumns = {
            @JoinColumn(name = "USER_ID") }, inverseJoinColumns = {
            @JoinColumn(name = "ROLE_ID") })
    private Set<Role> roles;

In the Repository need to have a method like below.

User findByUsername(String username);

Please check this Github Repo(https://github.com/Senthuran100/SpringBoot_JWT) for your reference.

Answer 2

You need to store user roles inside JWT token as additional claims, extract them after token validation and pass as 'authorities' for principal:

 Collection<? extends GrantedAuthority> authorities
                = Arrays.asList(claims.get(AUTHORITIES_KEY).toString().split(",")).stream()
                .map(authority -> new SimpleGrantedAuthority(authority))
                .collect(Collectors.toList());

        User principal = new User(claims.getSubject(), "",
                authorities);

        UsernamePasswordAuthenticationToken t
                = new UsernamePasswordAuthenticationToken(principal, "", authorities);

Answer 3

you should add role into Token and for example you can refer following link:- http://www.svlada.com/jwt-token-authentication-with-spring-boot/