/*******************************************************************************
*Copyright (c) 2009 Eucalyptus Systems, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, only version 3 of the License.
*
*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Please contact Eucalyptus Systems, Inc., 130 Castilian
* Dr., Goleta, CA 93101 USA or visit <http://www.eucalyptus.com/licenses/>
* if you need additional information or have any questions.
*
* This file may incorporate work covered under the following copyright and
* permission notice:
*
* Software License Agreement (BSD License)
*
* Copyright (c) 2008, Regents of the University of California
* All rights reserved.
*
* Redistribution and use of this software in source and binary forms, with
* or without modification, are permitted provided that the following
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*
* Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* LICENSED MATERIAL, COPYRIGHTED MATERIAL OR PATENTED MATERIAL IN THIS
* SOFTWARE, AND IF ANY SUCH MATERIAL IS DISCOVERED THE PARTY DISCOVERING
* IT MAY INFORM DR. RICH WOLSKI AT THE UNIVERSITY OF CALIFORNIA, SANTA
* BARBARA WHO WILL THEN ASCERTAIN THE MOST APPROPRIATE REMEDY, WHICH IN
* THE REGENTS’ DISCRETION MAY INCLUDE, WITHOUT LIMITATION, REPLACEMENT
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*******************************************************************************/
package com.eucalyptus.ws.handlers;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.groovy.JsonSlurper;
import org.apache.log4j.Logger;
import org.apache.tools.ant.util.DateUtils;
import org.bouncycastle.util.encoders.Base64;
import com.eucalyptus.util.WalrusProperties;
import com.eucalyptus.auth.login.AuthenticationException;
import com.eucalyptus.http.MappingHttpRequest;
public class UploadPolicyChecker {
private static Logger LOG = Logger.getLogger( UploadPolicyChecker.class );
public static void checkPolicy(MappingHttpRequest httpRequest, Map<String, String> formFields) throws AuthenticationException {
if(formFields.containsKey(WalrusProperties.FormField.policy.toString())) {
String authenticationHeader = "";
String policy = new String(Base64.decode(formFields.remove(WalrusProperties.FormField.policy.toString())));
String policyData;
try {
policyData = new String(Base64.encode(policy.getBytes()));
} catch (Exception ex) {
LOG.warn(ex, ex);
throw new AuthenticationException("error reading policy data.");
}
//parse policy
try {
JsonSlurper jsonSlurper = new JsonSlurper();
JSONObject policyObject = (JSONObject)jsonSlurper.parseText(policy);
String expiration = (String) policyObject.get(WalrusProperties.PolicyHeaders.expiration.toString());
if(expiration != null) {
Date expirationDate = DateUtils.parseIso8601DateTimeOrDate(expiration);
if((new Date()).getTime() > expirationDate.getTime()) {
LOG.warn("Policy has expired.");
throw new AuthenticationException("Policy has expired.");
}
}
List<String> policyItemNames = new ArrayList<String>();
JSONArray conditions = (JSONArray) policyObject.get(WalrusProperties.PolicyHeaders.conditions.toString());
for (int i = 0 ; i < conditions.size() ; ++i) {
Object policyItem = conditions.get(i);
if(policyItem instanceof JSONObject) {
JSONObject jsonObject = (JSONObject) policyItem;
if(!exactMatch(jsonObject, formFields, policyItemNames)) {
LOG.warn("Policy verification failed. ");
throw new AuthenticationException("Policy verification failed.");
}
} else if(policyItem instanceof JSONArray) {
JSONArray jsonArray = (JSONArray) policyItem;
if(!partialMatch(jsonArray, formFields, policyItemNames)) {
LOG.warn("Policy verification failed. ");
throw new AuthenticationException("Policy verification failed.");
}
}
}
Set<String> formFieldsKeys = formFields.keySet();
for(String formKey : formFieldsKeys) {
if(formKey.startsWith(WalrusProperties.IGNORE_PREFIX))
continue;
boolean fieldOkay = false;
for(WalrusProperties.IgnoredFields field : WalrusProperties.IgnoredFields.values()) {
if(formKey.equals(field.toString())) {
fieldOkay = true;
break;
}
}
if(fieldOkay)
continue;
if(policyItemNames.contains(formKey))
continue;
LOG.error("All fields except those marked with x-ignore- should be in policy. Form Key: " + formKey);
throw new AuthenticationException("All fields except those marked with x-ignore- should be in policy.");
}
} catch(Exception ex) {
//rethrow
LOG.warn(ex);
throw new AuthenticationException(ex);
}
//all form uploads without a policy are anonymous
if(formFields.containsKey(WalrusProperties.FormField.AWSAccessKeyId.toString())) {
String accessKeyId = formFields.remove(WalrusProperties.FormField.AWSAccessKeyId.toString());
authenticationHeader += "AWS" + " " + accessKeyId + ":";
}
if(formFields.containsKey(WalrusProperties.FormField.signature.toString())) {
String signature = formFields.remove(WalrusProperties.FormField.signature.toString());
authenticationHeader += signature;
httpRequest.addHeader(WalrusPOSTAuthenticationHandler.SecurityParameter.Authorization.toString(), authenticationHeader);
}
httpRequest.addHeader(WalrusProperties.FormField.FormUploadPolicyData.toString(), policyData);
}
}
private static boolean exactMatch(JSONObject jsonObject, Map<String, String> formFields, List<String> policyItemNames) {
Iterator<String> iterator = jsonObject.keys();
String key = null;
boolean returnValue = false;
while(iterator.hasNext()) {
key = iterator.next();
key = key.replaceAll("\\$", "");
policyItemNames.add(key);
try {
if(jsonObject.get(key).equals(formFields.get(key).trim()))
returnValue = true;
else
returnValue = false;
} catch(Exception ex) {
LOG.error(ex);
return false;
}
}
if(!returnValue)
LOG.error("exact match on " + key + " failed");
return returnValue;
}
private static boolean partialMatch(JSONArray jsonArray, Map<String, String> formFields, List<String> policyItemNames) {
boolean returnValue = false;
String key;
if(jsonArray.size() != 3)
return false;
try {
String condition = (String) jsonArray.get(0);
key = (String) jsonArray.get(1);
key = key.replaceAll("\\$", "");
policyItemNames.add(key);
String value = (String) jsonArray.get(2);
if(condition.contains("eq")) {
if(value.equals(formFields.get(key).trim()))
returnValue = true;
} else if(condition.contains("starts-with")) {
if(!formFields.containsKey(key))
return false;
if(formFields.get(key).trim().startsWith(value))
returnValue = true;
}
} catch(Exception ex) {
LOG.error(ex);
return false;
}
if(!returnValue)
LOG.error("partial match on " + key + " failed");
return returnValue;
}
}