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/*
* Copyright (C) 2008-2023, Juick
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.juick.service.security;
import com.juick.service.UserService;
import com.juick.service.security.entities.JuickUser;
import io.jsonwebtoken.JwtParser;
import io.jsonwebtoken.Jwts;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import javax.annotation.Nonnull;
import java.io.IOException;
import java.security.KeyPair;
import java.util.Collections;
import java.util.stream.Collectors;
public class BearerTokenAuthenticationFilter extends BaseAuthenticationFilter {
private static final Logger logger = LoggerFactory.getLogger("Auth");
private final JwtParser jwtParser;
private final UserService userService;
public BearerTokenAuthenticationFilter(UserService userService, KeyPair keys) {
this.userService = userService;
this.jwtParser = Jwts.parserBuilder()
.setSigningKey(keys.getPrivate())
.build();
}
@Override
protected void doFilterInternal(HttpServletRequest request,
HttpServletResponse response,
FilterChain filterChain) throws ServletException, IOException {
if (authenticationIsRequired()) {
var headers = Collections.list(request.getHeaderNames())
.stream()
.collect(Collectors.toMap(String::toLowerCase, request::getHeader));
var authorizationHeaderValue = headers.get("authorization");
if (StringUtils.isNotEmpty(authorizationHeaderValue) && authorizationHeaderValue.startsWith("Bearer")) {
String token = authorizationHeaderValue.substring(7);
try {
var claims = jwtParser.parseClaimsJws(token).getBody();
var user = userService.getUserByName(claims.getSubject());
if (!user.isAnonymous()) {
Authentication authentication = new UsernamePasswordAuthenticationToken(
new JuickUser(user),
user.getCredentials(),
JuickUser.USER_AUTHORITY);
SecurityContextHolder.getContext().setAuthentication(authentication);
}
} catch (Exception e) {
logger.warn("Invalid Bearer token: {}", e.getMessage());
}
}
}
filterChain.doFilter(request, response);
}
}
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