forked from auth0-blog/springboot-auth-updated
/
JWTAuthenticationFilter.java
64 lines (55 loc) · 2.94 KB
/
JWTAuthenticationFilter.java
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package com.auth0.samples.authapi.springbootauthupdated.security;
import com.auth0.jwt.JWT;
import com.auth0.samples.authapi.springbootauthupdated.user.ApplicationUser;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.AuthenticationException;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Date;
import static com.auth0.jwt.algorithms.Algorithm.HMAC512;
import static com.auth0.samples.authapi.springbootauthupdated.security.SecurityConstants.EXPIRATION_TIME;
import static com.auth0.samples.authapi.springbootauthupdated.security.SecurityConstants.HEADER_STRING;
import static com.auth0.samples.authapi.springbootauthupdated.security.SecurityConstants.SECRET;
import static com.auth0.samples.authapi.springbootauthupdated.security.SecurityConstants.TOKEN_PREFIX;
public class JWTAuthenticationFilter extends UsernamePasswordAuthenticationFilter {
private AuthenticationManager authenticationManager;
public JWTAuthenticationFilter(AuthenticationManager authenticationManager) {
this.authenticationManager = authenticationManager;
}
@Override
public Authentication attemptAuthentication(HttpServletRequest req,
HttpServletResponse res) throws AuthenticationException {
try {
ApplicationUser creds = new ObjectMapper()
.readValue(req.getInputStream(), ApplicationUser.class);
return authenticationManager.authenticate(
new UsernamePasswordAuthenticationToken(
creds.getUsername(),
creds.getPassword(),
new ArrayList<>())
);
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
protected void successfulAuthentication(HttpServletRequest req,
HttpServletResponse res,
FilterChain chain,
Authentication auth) throws IOException, ServletException {
String token = JWT.create()
.withSubject(((User) auth.getPrincipal()).getUsername())
.withExpiresAt(new Date(System.currentTimeMillis() + EXPIRATION_TIME))
.sign(HMAC512(SECRET.getBytes()));
res.addHeader(HEADER_STRING, TOKEN_PREFIX + token);
}
}