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OAuth 2.0 SDK with OpenID Connection extensions for developing client and server applications.

There is a newer version: 11.20.1

/*
 * oauth2-oidc-sdk
 *
 * Copyright 2012-2020, Connect2id Ltd and contributors.
 *
 * 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.nimbusds.openid.connect.sdk.federation.entities;


import java.util.Arrays;
import java.util.Date;
import java.util.HashSet;

import net.jcip.annotations.Immutable;

import com.nimbusds.jose.proc.SecurityContext;
import com.nimbusds.jwt.JWTClaimsSet;
import com.nimbusds.jwt.proc.BadJWTException;
import com.nimbusds.jwt.proc.DefaultJWTClaimsVerifier;
import com.nimbusds.jwt.util.DateUtils;
import com.nimbusds.oauth2.sdk.id.Audience;


/**
 * Entity statement claims verifier.
 *
 * Verifies:
 *
 * 

 *     The presence of the required "iss", "sub", "iat", "exp" and "jwks"
 *         claims.
 *     
The current time is within the "iat" and "exp" window.
 * 
 */
@Immutable
public class EntityStatementClaimsVerifier extends DefaultJWTClaimsVerifier {
	
	
	/**
	 * {@code true} for self-issued statements.
	 */
	private final boolean isSelfIssued;
	
	
	/**
	 * Creates a new entity statement claims verifier for self-issued
	 * statements.
	 */
	public EntityStatementClaimsVerifier() {
		super(null, new HashSet<>(Arrays.asList("iss", "sub", "iat", "exp", "jwks")));
		isSelfIssued = true;
	}
	
	
	/**
	 * Creates a new entity statement claims verifier.
	 *
	 * @param expectedAudience The expected audience, {@code null} if not
	 * 	                   specified.
	 */
	public EntityStatementClaimsVerifier(final Audience expectedAudience) {
		super(
			expectedAudience != null ? expectedAudience.getValue() : null,
			null,
			new HashSet<>(Arrays.asList("iss", "sub", "iat", "exp"))
		);
		isSelfIssued = false;
	}
	
	
	@Override
	public void verify(final JWTClaimsSet claimsSet, final SecurityContext context) throws BadJWTException {
		
		super.verify(claimsSet, context);
		
		if (isSelfIssued) {
			if (!claimsSet.getIssuer().equals(claimsSet.getSubject())) {
				throw new BadJWTException("JWT not self-issued");
			}
		}
		
		// Add iat check
		Date now = new Date();
		if (! DateUtils.isBefore(claimsSet.getIssueTime(), now, getMaxClockSkew())) {
			throw new BadJWTException("JWT issue time after current time");
		}
	}
}