001/*******************************************************************************
002 * Copyright 2017 The MIT Internet Trust Consortium
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *   http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *******************************************************************************/
016
017package org.mitre.jwt.assertion.impl;
018
019import java.text.ParseException;
020
021import org.mitre.jwt.assertion.AssertionValidator;
022import org.mitre.jwt.signer.service.JWTSigningAndValidationService;
023import org.mitre.openid.connect.config.ConfigurationPropertiesBean;
024import org.slf4j.Logger;
025import org.slf4j.LoggerFactory;
026import org.springframework.beans.factory.annotation.Autowired;
027import org.springframework.stereotype.Component;
028
029import com.google.common.base.Strings;
030import com.nimbusds.jwt.JWT;
031import com.nimbusds.jwt.JWTClaimsSet;
032import com.nimbusds.jwt.SignedJWT;
033
034/**
035 * Validates all assertions generated by this server
036 *
037 * @author jricher
038 *
039 */
040@Component("selfAssertionValidator")
041public class SelfAssertionValidator implements AssertionValidator {
042
043        private static Logger logger = LoggerFactory.getLogger(SelfAssertionValidator.class);
044
045        @Autowired
046        private ConfigurationPropertiesBean config;
047
048        @Autowired
049        private JWTSigningAndValidationService jwtService;
050
051        @Override
052        public boolean isValid(JWT assertion) {
053                if (!(assertion instanceof SignedJWT)) {
054                        // unsigned assertion
055                        return false;
056                }
057
058                JWTClaimsSet claims;
059                try {
060                        claims = assertion.getJWTClaimsSet();
061                } catch (ParseException e) {
062                        logger.debug("Invalid assertion claims");
063                        return false;
064                }
065
066                // make sure the issuer exists
067                if (Strings.isNullOrEmpty(claims.getIssuer())) {
068                        logger.debug("No issuer for assertion, rejecting");
069                        return false;
070                }
071
072                // make sure the issuer is us
073                if (!claims.getIssuer().equals(config.getIssuer())) {
074                        logger.debug("Issuer is not the same as this server, rejecting");
075                        return false;
076                }
077
078                // validate the signature based on our public key
079                if (jwtService.validateSignature((SignedJWT) assertion)) {
080                        return true;
081                } else {
082                        return false;
083                }
084
085        }
086
087}