content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.nacos.console.utils;
  
  import io.jsonwebtoken.*;
  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.GrantedAuthority;
  import org.springframework.security.core.authority.AuthorityUtils;
  import org.springframework.security.core.userdetails.User;
  import org.springframework.stereotype.Component;
  
  import javax.annotation.PostConstruct;
  import java.util.Date;
  import java.util.List;
  
  
  /**
   * Jwt token tool
   *
   * @author wfnuser
   */
  @Component
  public class JwtTokenUtils {
  
      private final Logger log = LoggerFactory.getLogger(JwtTokenUtils.class);
  
      private static final String AUTHORITIES_KEY = "auth";
  
      /**
       * secret key
       */
      private String secretKey;
  
      /**
       * Token validity time(ms)
       */
      private long tokenValidityInMilliseconds;
  
      @PostConstruct
      public void init() {
          this.secretKey = "SecretKey012345678901234567890123456789012345678901234567890123456789";
          this.tokenValidityInMilliseconds = 1000 * 60 * 30L;
      }
  
      /**
       * Create token
       *
       * @param authentication auth info
       * @return token
       */
      public String createToken(Authentication authentication) {
          /**
           * Current time
           */
          long now = (new Date()).getTime();
          /**
           * Validity date
           */
          Date validity;
          validity = new Date(now + this.tokenValidityInMilliseconds);
  
          /**
           * create token
           */
          return Jwts.builder()
              .setSubject(authentication.getName())
              .claim(AUTHORITIES_KEY, "")
              .setExpiration(validity)
              .signWith(SignatureAlgorithm.HS256, secretKey)
              .compact();
      }
  
      /**
       * Get auth Info
       *
       * @param token token
       * @return auth info
       */
      public Authentication getAuthentication(String token) {
          /**
           *  parse the payload of token
           */
          Claims claims = Jwts.parser()
              .setSigningKey(secretKey)
              .parseClaimsJws(token)
              .getBody();
  
          List<GrantedAuthority> authorities = AuthorityUtils.commaSeparatedStringToAuthorityList((String) claims.get(AUTHORITIES_KEY));
  
  
          User principal = new User(claims.getSubject(), "", authorities);
          return new UsernamePasswordAuthenticationToken(principal, "", authorities);
      }
  
      /**
       * validate token
       *
       * @param token token
       * @return whether valid
       */
      public boolean validateToken(String token) {
          try {
              Jwts.parser().setSigningKey(secretKey).parseClaimsJws(token);
              return true;
          } catch (SignatureException e) {
              log.info("Invalid JWT signature.");
              log.trace("Invalid JWT signature trace: {}", e);
          } catch (MalformedJwtException e) {
              log.info("Invalid JWT token.");
              log.trace("Invalid JWT token trace: {}", e);
          } catch (ExpiredJwtException e) {
              log.info("Expired JWT token.");
              log.trace("Expired JWT token trace: {}", e);
          } catch (UnsupportedJwtException e) {
              log.info("Unsupported JWT token.");
              log.trace("Unsupported JWT token trace: {}", e);
          } catch (IllegalArgumentException e) {
              log.info("JWT token compact of handler are invalid.");
              log.trace("JWT token compact of handler are invalid trace: {}", e);
          }
          return false;
      }
  }
  