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* Licensed to the Apache Software Foundation (ASF) under one *
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* 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 *
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* specific language governing permissions and limitations *
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package org.apache.james.jspf.policies;
import org.apache.james.jspf.core.DNSLookupContinuation;
import org.apache.james.jspf.core.DNSRequest;
import org.apache.james.jspf.core.DNSResponse;
import org.apache.james.jspf.core.SPF1Record;
import org.apache.james.jspf.core.SPF1Utils;
import org.apache.james.jspf.core.SPFCheckerDNSResponseListener;
import org.apache.james.jspf.core.SPFSession;
import org.apache.james.jspf.core.exceptions.NeutralException;
import org.apache.james.jspf.core.exceptions.NoneException;
import org.apache.james.jspf.core.exceptions.PermErrorException;
import org.apache.james.jspf.core.exceptions.TempErrorException;
import org.apache.james.jspf.core.exceptions.TimeoutException;
import java.util.List;
/**
* Get the raw dns txt or spf entry which contains a spf entry. If a domain
* publish both, and both are not equals it throws a PermError
*/
public class SPFStrictCheckerRetriever extends SPFRetriever {
private static final String ATTRIBUTE_SPFSTRICT_CHECK_SPFRECORDS = "SPFStrictCheck.SPFRecords";
private static final class SPFStrictSPFRecordsDNSResponseListener implements SPFCheckerDNSResponseListener {
/**
* @see org.apache.james.jspf.core.SPFCheckerDNSResponseListener#onDNSResponse(org.apache.james.jspf.core.DNSResponse, org.apache.james.jspf.core.SPFSession)
*/
@SuppressWarnings("unchecked")
public DNSLookupContinuation onDNSResponse(
DNSResponse response, SPFSession session)
throws PermErrorException,
NoneException, TempErrorException,
NeutralException {
List<String> spfR = (List<String>) session.getAttribute(ATTRIBUTE_SPFSTRICT_CHECK_SPFRECORDS);
List<String> spfTxtR = null;
try {
spfTxtR = response.getResponse();
} catch (TimeoutException e) {
throw new TempErrorException("Timeout querying dns");
}
String record = calculateSpfRecord(spfR, spfTxtR);
if (record != null) {
session.setAttribute(SPF1Utils.ATTRIBUTE_SPF1_RECORD, new SPF1Record(record));
}
return null;
}
}
private static final class SPFStrictCheckDNSResponseListener implements SPFCheckerDNSResponseListener {
/**
* @see org.apache.james.jspf.core.SPFCheckerDNSResponseListener#onDNSResponse(org.apache.james.jspf.core.DNSResponse, org.apache.james.jspf.core.SPFSession)
*/
public DNSLookupContinuation onDNSResponse(
DNSResponse response, SPFSession session)
throws PermErrorException, NoneException,
TempErrorException, NeutralException {
try {
List<String> spfR = response.getResponse();
session.setAttribute(ATTRIBUTE_SPFSTRICT_CHECK_SPFRECORDS, spfR);
String currentDomain = session.getCurrentDomain();
return new DNSLookupContinuation(new DNSRequest(currentDomain, DNSRequest.TXT), new SPFStrictSPFRecordsDNSResponseListener());
} catch (TimeoutException e) {
throw new TempErrorException("Timeout querying dns");
}
}
}
/**
* @see org.apache.james.jspf.policies.SPFRetriever#checkSPF(org.apache.james.jspf.core.SPFSession)
*/
public DNSLookupContinuation checkSPF(SPFSession spfData)
throws PermErrorException, TempErrorException, NeutralException,
NoneException {
SPF1Record res = (SPF1Record) spfData.getAttribute(SPF1Utils.ATTRIBUTE_SPF1_RECORD);
if (res == null) {
String currentDomain = spfData.getCurrentDomain();
return new DNSLookupContinuation(new DNSRequest(currentDomain, DNSRequest.SPF), new SPFStrictCheckDNSResponseListener());
}
return null;
}
private static String calculateSpfRecord(List<String> spfR, List<String> spfTxtR)
throws PermErrorException {
String spfR1 = null;
String spfR2 = null;
if (spfR != null) spfR1 = extractSPFRecord(spfR);
if (spfTxtR != null) spfR2 = extractSPFRecord(spfTxtR);
if (spfR1 != null && spfR2 == null) {
return spfR1;
} else if (spfR1 == null && spfR2 != null) {
return spfR2;
} else if (spfR1 != null && spfR2 != null) {
if (spfR1.toLowerCase().equals(spfR2.toLowerCase()) == false) {
throw new PermErrorException("Published SPF records not equals");
} else {
return spfR1;
}
} else {
return null;
}
}
}