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package fish.payara.security.jacc.provider;

import static com.sun.logging.LogDomains.SECURITY_LOGGER;
import fish.payara.jacc.ContextProvider;
import fish.payara.jacc.JaccConfigurationFactory;
import jakarta.security.jacc.PolicyConfiguration;
import jakarta.security.jacc.PolicyConfigurationFactory;
import jakarta.security.jacc.PolicyContextException;
import java.security.Permission;
import java.security.Policy;
import java.security.SecurityPermission;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import static java.util.logging.Level.FINE;
import java.util.logging.Logger;
import org.glassfish.exousia.modules.locked.SimplePolicyConfigurationFactory;
import org.jvnet.hk2.annotations.ContractsProvided;
import org.jvnet.hk2.annotations.Service;

/**
 * Implementation of jacc PolicyConfigurationFactory class
 */
@Service
@ContractsProvided({ PolicyConfigurationFactoryImpl.class, PolicyConfigurationFactory.class })
public class PolicyConfigurationFactoryImpl extends SimplePolicyConfigurationFactory implements JaccConfigurationFactory {

    
    private static Logger logger = Logger.getLogger(SECURITY_LOGGER);
    private Map applicationToPolicyContextIdMap = new ConcurrentHashMap();

    // Map of ContextId -> ContextProvider (per context PolicyConfigurationFactory and Policy)
    private Map contextToContextProviderMap = new ConcurrentHashMap<>();
    
    
    // Map of ContextId -> PolicyConfiguration
    private Map contextToConfigurationMap = new ConcurrentHashMap<>();
    
    private Permission setPolicyPermission;
    
    private static PolicyConfigurationFactoryImpl singleton;

    public PolicyConfigurationFactoryImpl() {
        singleton = this;
    }
    
    static PolicyConfigurationFactoryImpl getInstance() {
        return singleton;
    }
    
    @Override
    public void registerContextProvider(String applicationContextId, PolicyConfigurationFactory factory, Policy policy) {
        checkSetPolicyPermission();
        
        try {
            String policyContextId = applicationToPolicyContextIdMap.get(applicationContextId);
            if (policyContextId == null) {
                throw new IllegalStateException(
                        "No policyContextId available for applicationContextId " + applicationContextId + 
                        " Is this JaccConfigurationFactory instance used by the container?");
            }
            
            if (inService(policyContextId)) {
                throw new IllegalStateException("Context :" + policyContextId + " already has an active global provider");
            }
        
            ContextProvider contextProvider = contextToContextProviderMap.get(policyContextId);
            if (contextProvider != null && contextProvider.getPolicyConfigurationFactory().inService(policyContextId)) {
                throw new IllegalStateException("Context :" + policyContextId + " already has an active context (per app) provider");
            }
            
            contextToContextProviderMap.put(policyContextId, new ContextProviderImpl(factory, policy));
            
        } catch (PolicyContextException e) {
            throw new IllegalStateException(e);
        }
    }

    @Override
    public void addContextIdMapping(String applicationContextId, String policyContextId) {
         applicationToPolicyContextIdMap.put(applicationContextId, policyContextId);
    }

    @Override
    public boolean removeContextIdMappingByPolicyContextId(String policyContextId) {
        return applicationToPolicyContextIdMap.entrySet().removeIf(e -> e.getValue().equals(policyContextId));
    }
    
    @Override
    public ContextProvider getContextProviderByPolicyContextId(String policyContextId) {
        return contextToContextProviderMap.get(policyContextId);
    }

    @Override
    public ContextProvider removeContextProviderByPolicyContextId(String policyContextId) {
          return contextToContextProviderMap.remove(policyContextId);
    }
    
    protected List getPolicyConfigurations() {
        return new ArrayList<>(contextToConfigurationMap.values());
    }

    protected PolicyConfiguration removePolicyConfiguration(String contextID) {
        return contextToConfigurationMap.remove(contextID);
    }

    
    /**
     * This method is used to obtain an instance of the provider specific class that implements the PolicyConfiguration
     * interface that corresponds to the identified policy context within the provider. The methods of the
     * PolicyConfiguration interface are used to define the policy statements of the identified policy context.
     * 

* If at the time of the call, the identified policy context does not exist in the provider, then the policy context * will be created in the provider and the Object that implements the context's PolicyConfiguration Interface will be * returned. If the state of the identified context is "deleted" or "inService" it will be transitioned to the "open" * state as a result of the call. The states in the lifecycle of a policy context are defined by the PolicyConfiguration * interface. *

* For a given value of policy context identifier, this method must always return the same instance of * PolicyConfiguration and there must be at most one actual instance of a PolicyConfiguration with a given policy * context identifier (during a process context). *

* To preserve the invariant that there be at most one PolicyConfiguration object for a given policy context, it may be * necessary for this method to be thread safe. *

* * @param contextID A String identifying the policy context whose PolicyConfiguration interface is to be returned. The * value passed to this parameter must not be null. *

* @param remove A boolean value that establishes whether or not the policy statements of an existing policy context are * to be removed before its PolicyConfiguration object is returned. If the value passed to this parameter is true, the * policy statements of an existing policy context will be removed. If the value is false, they will not be removed. * * @return an Object that implements the PolicyConfiguration Interface matched to the Policy provider and corresponding * to the identified policy context. * * @throws java.lang.SecurityException when called by an AccessControlContext that has not been granted the "setPolicy" * SecurityPermission. * * @throws javax.security.jacc.PolicyContextException if the implementation throws a checked exception that has not been * accounted for by the getPolicyConfiguration method signature. The exception thrown by the implementation class will * be encapsulated (during construction) in the thrown PolicyContextException. */ @Override public PolicyConfiguration getPolicyConfiguration(String contextId, boolean remove) throws PolicyContextException { checkSetPolicyPermission(); if (logger.isLoggable(FINE)) { logger.fine("JACC Policy Provider: Getting PolicyConfiguration object with id = " + contextId); } ContextProvider contextProvider = contextToContextProviderMap.get(contextId); if (contextProvider != null) { return contextProvider.getPolicyConfigurationFactory().getPolicyConfiguration(contextId, remove); } PolicyConfiguration policyConfiguration = super.getPolicyConfiguration(contextId, remove); contextToConfigurationMap.put(contextId, policyConfiguration); return policyConfiguration; } /** * This method determines if the identified policy context exists with state "inService" in the Policy provider * associated with the factory. *

* * @param contextID A string identifying a policy context * * @return true if the identified policy context exists within the provider and its state is "inService", false * otherwise. * * @throws java.lang.SecurityException when called by an AccessControlContext that has not been granted the "setPolicy" * SecurityPermission. * * @throws javax.security.jacc.PolicyContextException if the implementation throws a checked exception that has not been * accounted for by the inService method signature. The exception thrown by the implementation class will be * encapsulated (during construction) in the thrown PolicyContextException. */ @Override public boolean inService(String contextId) throws PolicyContextException { checkSetPolicyPermission(); ContextProvider contextProvider = contextToContextProviderMap.get(contextId); if (contextProvider != null) { return contextProvider.getPolicyConfigurationFactory().inService(contextId); } return super.inService(contextId); } protected List getPolicyConfigurationImpls() { return new ArrayList<>(contextToConfigurationMap.values()); } protected PolicyConfiguration removePolicyConfigurationImpl(String contextID) { return contextToConfigurationMap.remove(contextID); } protected void checkSetPolicyPermission() { SecurityManager securityManager = System.getSecurityManager(); if (securityManager != null) { if (setPolicyPermission == null) { setPolicyPermission = new SecurityPermission("setPolicy"); } securityManager.checkPermission(setPolicyPermission); } } }





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