jwt生成和解密-jose4j

jwt的概念和生成意义在这里就不描述了，百度能搜到很多，直接上代码

官网地址

https://bitbucket.org/b_c/jose4j/wiki/Home

maven

<dependency>
    <groupId>org.bitbucket.b_c</groupId>
    <artifactId>jose4j</artifactId>
    <version>0.9.3</version>
  </dependency>

生成jwt 地址

   	RsaJsonWebKey rsaJsonWebKey = RsaJwkGenerator.generateJwk(2048);
      rsaJsonWebKey.setKeyId("k1");
      JwtClaims claims = new JwtClaims();
      claims.setIssuer("xizi");
      claims.setAudience("allUser");
      claims.setExpirationTimeMinutesInTheFuture(1);
      claims.setGeneratedJwtId();
      claims.setIssuedAtToNow();
      claims.setNotBeforeMinutesInThePast(1);
      claims.setSubject("admin");
      claims.setClaim("home", "喜子开发平台");
      String[] claim = {"group", "admin"};
      claims.setStringListClaim("group", Arrays.asList(claim));
      JsonWebSignature jws = new JsonWebSignature();
      jws.setPayload(claims.toJson());
      jws.setKey(rsaJsonWebKey.getPrivateKey());
      jws.setKeyIdHeaderValue(rsaJsonWebKey.getKeyId());
      jws.setAlgorithmHeaderValue(AlgorithmIdentifiers.RSA_PSS_USING_SHA256);
      String jwt = jws.getCompactSerialization();
      log.info("jwt {}", jwt);
      toByte(rsaJsonWebKey.getKey());

注意最后的这个代码是为了生成公钥的，一会用来验证，否则不会验证成功的，此处先保存到本地
toByte(rsaJsonWebKey.getKey());

校验代码

     String jwt = "eyJraWQiOiJrMSIsImFsZyI6IlBTMjU2In0.eyJpc3MiOiJ4aXppIiwiYXVkIjoiYWxsVXNlciIsImV4cCI6MTY4MTM5Mjg4MCwianRpIjoicFpSbGxubC11aDUxal9RS3ctZ1RBdyIsImlhdCI6MTY4MTM5MjgyMCwibmJmIjoxNjgxMzkyNzYwLCJzdWIiOiJhZG1pbiIsImVtYWlsIjoiYmozNTczNDkxQHNpbmEuY29tIiwiZ3JvdXAiOlsiZ3JvdXAiLCJhZG1pbiJdfQ.R2gGhlcuXtNLp5f-u_GAobh_XXLHUH0IC_QdVGEmxlnbhlY0gjPLeeb8w1aAQvJ1Y7VqCd-flYR2GxHa2M0LAbpyR_8S5jCZTTnznH0GrsBUcvJY8oEEHwny3fOAVMmAj8ms840qbeNz4Ib9i1w_zQten7hEXAU-6fhD9cKms6ji5tglu9p5nYaF0ugbcyi41kDAUqjDtCTncskEXiifgwAkbDeWADzRSmtVm0MwjT_xBu1dqDYMbPnz0jHHraL-67e0cfTurEKhjQiOZ6DjGQsusMcjlhRzD2CwPPULAHQQcwODld87nlmBI8SxnjqmA8iIMvTX2ZQbas_YI98Xtg";

        RsaJsonWebKey rsaJsonWebKey = RsaJwkGenerator.generateJwk(2048);
        rsaJsonWebKey.setKeyId("k1");
        JwtConsumer jwtConsumer = new JwtConsumerBuilder()
                .setRequireExpirationTime() // the JWT must have an expiration time
                .setAllowedClockSkewInSeconds(1) // allow some leeway in validating time based claims to account for clock skew
                .setRequireSubject() // the JWT must have a subject claim
                .setExpectedIssuer("xizi") // whom the JWT needs to have been issued by
                .setExpectedAudience("allUser") // to whom the JWT is intended for
                .setVerificationKey(read()) // verify the signature with the public key
                .setJwsAlgorithmConstraints( // only allow the expected signature algorithm(s) in the given context
                        AlgorithmConstraints.ConstraintType.PERMIT, AlgorithmIdentifiers.RSA_PSS_USING_SHA256) // which is only RS256 here
                .build(); // create the JwtConsumer instance

        try {
            //  Validate the JWT and process it to the Claims
            JwtClaims jwtClaims = jwtConsumer.processToClaims(jwt);
            log.info("JWT validation succeeded! {}" ,jwtClaims.toJson());
        } catch (InvalidJwtException e) {
            log.error("Invalid JWT! {}", e.getMessage());

            if (e.hasExpired()) {
                log.error("JWT expired at {}" ,e.getJwtContext().getJwtClaims().getExpirationTime());
            }

            if (e.hasErrorCode(ErrorCodes.AUDIENCE_INVALID)) {
                log.error("JWT had wrong audience: {}" + e.getJwtContext().getJwtClaims().getAudience());
            }
        }

基本就是摘抄的官网的，大家可以去官网看看
此处就看可以看到验证成功还是失败了

注意这个方法 read()) 是为了读取上个方法存的公钥

下面是存公钥和读公钥的方法，实际项目中不用这个存，这个就是为了测试用用

    public void toByte(Key key) throws IOException {
        FileOutputStream out = new FileOutputStream("key");
        ObjectOutputStream oo = new ObjectOutputStream(out);
        oo.writeObject(key);
        oo.flush();
        oo.close();
    }

    public Key read() throws IOException, ClassNotFoundException {
        ObjectInputStream in = new ObjectInputStream(new FileInputStream("key"));
        Key key = (Key) (in.readObject());
        in.close();
        return key;
    }