/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.cxf.rs.security.oauth2.tokens.hawk;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.rs.security.oauth2.provider.OAuthServiceException;
public class NonceVerifierImpl implements NonceVerifier {
private NonceStore nonceStore;
private long allowedWindow;
public void verifyNonce(String tokenKey, String clientNonceString, String clientTimestampString)
throws OAuthServiceException {
if (StringUtils.isEmpty(clientNonceString)
|| StringUtils.isEmpty(clientTimestampString)) {
throw new OAuthServiceException("Nonce or timestamp is not available");
}
long serverClock = System.currentTimeMillis();
long clientTimestamp = Long.valueOf(clientTimestampString);
NonceHistory nonceHistory = nonceStore.getNonceHistory(tokenKey);
Nonce nonce = new Nonce(clientNonceString, clientTimestamp);
if (nonceHistory == null) {
long requestTimeDelta = serverClock - clientTimestamp;
nonceStore.initNonceHistory(tokenKey, nonce, requestTimeDelta);
} else {
checkAdjustedRequestTime(serverClock, clientTimestamp, nonceHistory);
if (!nonceHistory.addNonce(nonce)) {
throw new OAuthServiceException("Duplicate nonce");
}
}
}
private void checkAdjustedRequestTime(long serverClock, long clientTimestamp, NonceHistory nonceHistory) {
long adjustedRequestTime = clientTimestamp + nonceHistory.getRequestTimeDelta();
long requestDelta = Math.abs(serverClock - adjustedRequestTime);
if (requestDelta > allowedWindow) {
throw new OAuthServiceException("Timestamp is invalid");
}
}
public void setAllowedWindow(long allowedWindow) {
this.allowedWindow = allowedWindow;
}
public void setNonceStore(NonceStore nonceStore) {
this.nonceStore = nonceStore;
}
}