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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.tutorial.tutorial;
import java.util.List;
import java.util.Map;
import org.onap.policy.models.decisions.concepts.DecisionRequest;
import org.onap.policy.models.decisions.concepts.DecisionResponse;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
import org.onap.policy.pdp.xacml.application.common.ToscaDictionary;
import org.onap.policy.pdp.xacml.application.common.ToscaPolicyConversionException;
import org.onap.policy.pdp.xacml.application.common.ToscaPolicyTranslator;
import org.onap.policy.pdp.xacml.application.common.ToscaPolicyTranslatorUtils;
import com.att.research.xacml.api.DataTypeException;
import com.att.research.xacml.api.Decision;
import com.att.research.xacml.api.Identifier;
import com.att.research.xacml.api.Request;
import com.att.research.xacml.api.Response;
import com.att.research.xacml.api.Result;
import com.att.research.xacml.api.XACML3;
import com.att.research.xacml.std.IdentifierImpl;
import com.att.research.xacml.std.annotations.RequestParser;
import oasis.names.tc.xacml._3_0.core.schema.wd_17.AnyOfType;
import oasis.names.tc.xacml._3_0.core.schema.wd_17.EffectType;
import oasis.names.tc.xacml._3_0.core.schema.wd_17.MatchType;
import oasis.names.tc.xacml._3_0.core.schema.wd_17.PolicyType;
import oasis.names.tc.xacml._3_0.core.schema.wd_17.RuleType;
import oasis.names.tc.xacml._3_0.core.schema.wd_17.TargetType;
public class TutorialTranslator implements ToscaPolicyTranslator {
private static final Identifier ID_TUTORIAL_USER = new IdentifierImpl(ToscaDictionary.ID_URN_ONAP, "tutorial-user");
private static final Identifier ID_TUTORIAL_ENTITY =
new IdentifierImpl(ToscaDictionary.ID_URN_ONAP, "tutorial-entity");
private static final Identifier ID_TUTORIAL_PERM = new IdentifierImpl(ToscaDictionary.ID_URN_ONAP, "tutorial-perm");
@SuppressWarnings("unchecked")
public PolicyType convertPolicy(ToscaPolicy toscaPolicy) throws ToscaPolicyConversionException {
//
// Here is our policy with a version and default combining algo
//
PolicyType newPolicyType = new PolicyType();
newPolicyType.setPolicyId(toscaPolicy.getMetadata().get("policy-id"));
newPolicyType.setVersion(toscaPolicy.getMetadata().get("policy-version"));
//
// When choosing the rule combining algorithm, be sure to be mindful of the
// setting xacml.att.policyFinderFactory.combineRootPolicies in the
// xacml.properties file. As that choice for ALL the policies together may have
// an impact on the decision rendered from each individual policy.
//
// In this case, we will only produce XACML rules for permissions. If no permission
// combo exists, then the default is to deny.
//
newPolicyType.setRuleCombiningAlgId(XACML3.ID_RULE_DENY_UNLESS_PERMIT.stringValue());
//
// Create the target for the Policy.
//
// For simplicity, let's just match on the action "authorize" and the user
//
MatchType matchAction = ToscaPolicyTranslatorUtils.buildMatchTypeDesignator(XACML3.ID_FUNCTION_STRING_EQUAL,
"authorize", XACML3.ID_DATATYPE_STRING, XACML3.ID_ACTION, XACML3.ID_ATTRIBUTE_CATEGORY_ACTION);
Map<String, Object> props = toscaPolicy.getProperties();
String user = props.get("user").toString();
MatchType matchUser = ToscaPolicyTranslatorUtils.buildMatchTypeDesignator(XACML3.ID_FUNCTION_STRING_EQUAL, user,
XACML3.ID_DATATYPE_STRING, ID_TUTORIAL_USER, XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
AnyOfType anyOf = new AnyOfType();
//
// Create AllOf (AND) of just Policy Id
//
anyOf.getAllOf().add(ToscaPolicyTranslatorUtils.buildAllOf(matchAction));
anyOf.getAllOf().add(ToscaPolicyTranslatorUtils.buildAllOf(matchUser));
TargetType target = new TargetType();
target.getAnyOf().add(anyOf);
newPolicyType.setTarget(target);
//
// Now add the rule for each permission
//
List<Object> permissions = (List<Object>) props.get("permissions");
for (Object permission : permissions) {
MatchType matchEntity = ToscaPolicyTranslatorUtils.buildMatchTypeDesignator(XACML3.ID_FUNCTION_STRING_EQUAL,
((Map<String, String>) permission).get("entity"), XACML3.ID_DATATYPE_STRING, ID_TUTORIAL_ENTITY,
XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
MatchType matchPermission = ToscaPolicyTranslatorUtils.buildMatchTypeDesignator(
XACML3.ID_FUNCTION_STRING_EQUAL, ((Map<String, String>) permission).get("permission"),
XACML3.ID_DATATYPE_STRING, ID_TUTORIAL_PERM, XACML3.ID_ATTRIBUTE_CATEGORY_RESOURCE);
anyOf = new AnyOfType();
anyOf.getAllOf().add(ToscaPolicyTranslatorUtils.buildAllOf(matchEntity));
anyOf.getAllOf().add(ToscaPolicyTranslatorUtils.buildAllOf(matchPermission));
target = new TargetType();
target.getAnyOf().add(anyOf);
RuleType rule = new RuleType();
rule.setDescription("Default is to PERMIT if the policy matches.");
rule.setRuleId(newPolicyType.getPolicyId() + ":rule");
rule.setEffect(EffectType.PERMIT);
rule.setTarget(target);
newPolicyType.getCombinerParametersOrRuleCombinerParametersOrVariableDefinition().add(rule);
}
return newPolicyType;
}
public Request convertRequest(DecisionRequest request) {
try {
return RequestParser.parseRequest(TutorialRequest.createRequest(request));
} catch (IllegalArgumentException | IllegalAccessException | DataTypeException e) {
}
return null;
}
public DecisionResponse convertResponse(Response xacmlResponse) {
DecisionResponse decisionResponse = new DecisionResponse();
//
// Iterate through all the results
//
for (Result xacmlResult : xacmlResponse.getResults()) {
//
// Check the result
//
if (xacmlResult.getDecision() == Decision.PERMIT) {
//
// Just simply return a Permit response
//
decisionResponse.setStatus(Decision.PERMIT.toString());
}
if (xacmlResult.getDecision() == Decision.DENY) {
//
// Just simply return a Deny response
//
decisionResponse.setStatus(Decision.DENY.toString());
}
if (xacmlResult.getDecision() == Decision.NOTAPPLICABLE) {
//
// There is no guard policy, so we return a permit
//
decisionResponse.setStatus(Decision.PERMIT.toString());
}
}
return decisionResponse;
}
}
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