Merged V2.2 to HEAD

8014: Extended support for RunAs - real and effctive authorities
   8032: Build Fix - there is a special check for the effective user
   8094: Fix for NPE in AuthenticationUtil noticed on first upgrade from V2.1.x to V2.2


git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@8471 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/repo/avm/wf/AVMSubmitPackageHandler.java

@@ -30,6 +30,7 @@ import java.util.Map;
 import org.alfresco.repo.avm.AVMDAOs;
 import org.alfresco.repo.avm.AVMNodeConverter;
 import org.alfresco.repo.domain.PropertyValue;
+import org.alfresco.repo.security.authentication.AuthenticationUtil;
 import org.alfresco.repo.transaction.AlfrescoTransactionSupport;
 import org.alfresco.repo.workflow.jbpm.JBPMNode;
 import org.alfresco.repo.workflow.jbpm.JBPMSpringActionHandler;
@@ -47,9 +48,7 @@ import org.apache.commons.logging.LogFactory;
 import org.jbpm.graph.exe.ExecutionContext;
 import org.springframework.beans.factory.BeanFactory;
 
-public class AVMSubmitPackageHandler 
-   extends JBPMSpringActionHandler 
-   implements Serializable 
+public class AVMSubmitPackageHandler extends JBPMSpringActionHandler implements Serializable
 {
     private static final long serialVersionUID = 4113360751217684995L;
 
@@ -65,14 +64,15 @@ public class AVMSubmitPackageHandler
     private AVMLockingService fAVMLockingService;
 
     /**
-     * The AVMSubmitTransactionListener instance 
-     * (for JMX notification of virtualization server after commit/rollback).
+     * The AVMSubmitTransactionListener instance (for JMX notification of virtualization server after commit/rollback).
      */
     private AVMSubmitTransactionListener fAVMSubmitTransactionListener;
 
     /**
      * Initialize service references.
-     * @param factory The BeanFactory to get references from.
+     * 
+     * @param factory
+     *            The BeanFactory to get references from.
      */
     @Override
     protected void initialiseHandler(final BeanFactory factory)
@@ -87,10 +87,11 @@ public class AVMSubmitPackageHandler
 
     /**
      * Do the actual work.
-     * @param executionContext The context to get stuff from.
+     * 
+     * @param executionContext
+     *            The context to get stuff from.
      */
-    public void execute(final ExecutionContext executionContext) 
-       throws Exception 
+    public void execute(final ExecutionContext executionContext) throws Exception
     {
         // TODO: Allow submit parameters to be passed into this action handler
         // rather than pulling directly from execution context
@@ -106,7 +107,6 @@ public class AVMSubmitPackageHandler
         final String description = (String) executionContext.getContextInstance().getVariable("bpm_workflowDescription");
         final String tag = (String) executionContext.getContextInstance().getVariable("wcmwf_label");
 
-
         final Map<QName, PropertyValue> dnsProperties = this.fAVMService.queryStorePropertyKey(targetPath.split(":")[0], QName.createQName(null, ".dns%"));
         String webProject = dnsProperties.keySet().iterator().next().getLocalName();
         webProject = webProject.substring(webProject.lastIndexOf('.') + 1, webProject.length());
@@ -130,9 +130,18 @@ public class AVMSubmitPackageHandler
 
         AlfrescoTransactionSupport.bindResource("staging_diffs", stagingDiffs);
 
+        // Workflow does this as system as the staging area has restricted access
+        AuthenticationUtil.runAs(new AuthenticationUtil.RunAsWork<Object>()
+        {
+
+            public Object doWork() throws Exception
+            {
                 fAVMSyncService.update(stagingDiffs, null, false, false, true, true, tag, description);
                 AVMDAOs.Instance().fAVMNodeDAO.flush();
                 fAVMSyncService.flatten(pkgPath.getSecond(), targetPath);
+                return null;
+            }
+        }, AuthenticationUtil.getSystemUserName());
 
         // flatten source folder where changes were submitted from
         if (from != null && from.length() > 0)
@@ -149,8 +158,7 @@ public class AVMSubmitPackageHandler
     }
 
     /**
-     * Recursively remove locks from a path. Walking child folders looking for files
-     * to remove locks from.
+     * Recursively remove locks from a path. Walking child folders looking for files to remove locks from.
      */
     private void recursivelyRemoveLocks(final String webProject, final int version, final String path)
     {

source/java/org/alfresco/repo/lock/LockServiceImpl.java

@@ -474,8 +474,9 @@ public class LockServiceImpl implements LockService,
         // Ensure we have found a node reference
         if (nodeRef != null && userName != null)
         {
+            String effectiveUserName = AuthenticationUtil.getCurrentEffectiveUserName();
             // Check to see if should just ignore this node - note: special MT System due to AuditableAspect
-            if (!(this.ignoreNodeRefs.contains(nodeRef) || tenantService.getBaseNameUser(userName).equals(AuthenticationUtil.getSystemUserName())))
+            if (!(this.ignoreNodeRefs.contains(nodeRef) || tenantService.getBaseNameUser(effectiveUserName).equals(AuthenticationUtil.getSystemUserName())))
             {
                 try
                 {

source/java/org/alfresco/repo/security/authentication/AlfrescoSecureContext.java

@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2005-2007 Alfresco Software Limited.
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ * As a special exception to the terms and conditions of version 2.0 of 
+ * the GPL, you may redistribute this Program in connection with Free/Libre 
+ * and Open Source Software ("FLOSS") applications as described in Alfresco's 
+ * FLOSS exception.  You should have recieved a copy of the text describing 
+ * the FLOSS exception, and it is also available here: 
+ * http://www.alfresco.com/legal/licensing"
+ */
+package org.alfresco.repo.security.authentication;
+
+import net.sf.acegisecurity.Authentication;
+import net.sf.acegisecurity.context.security.SecureContext;
+
+/**
+ * Extensions for the Alfresco security context.
+ * 
+ * This is based on the Linux model and supports real, effective and stored authorities
+ * 
+ * The real authority is used for auditing and reporting who the user is etc.
+ * The effective authority is used for permission checks.
+ * 
+ * RunAs support leaves the real authority and changes only the effective authority
+ * That means "special" code can run code as system but still be audited as Joe
+ * 
+ * In the future scrips etc can support a setUId flag and run as the owner of the script.
+ * If the script chooses to do this ....
+ * A method invocation could do the same (after entry security checks)
+ * 
+ * TODO: extent runAs to take a nodeRef context - it can then set the stored atc and set this as effective if required.
+ * 
+ * @author andyh
+ *
+ */
+public interface AlfrescoSecureContext extends SecureContext
+{
+    /**
+     * Get the effective authentication - used for permission checks
+     * @return
+     */
+    public Authentication getEffectiveAuthentication();
+    
+    /**
+     * Get the real authenticaiton - used for auditing and everything else
+     * @return
+     */
+    public Authentication getRealAuthentication();
+    
+    /**
+     * Get the store authentication - used for setuid scripts and methods
+     * @return
+     */
+    public Authentication getStoredAuthentication();
+    
+    /**
+     * Set the effective authentication held by the context
+     * 
+     * @param effictiveAuthentication
+     */
+    public void setEffectiveAuthentication(Authentication effictiveAuthentication);
+    
+    /**
+     * Set the real authentication held by the context
+     * 
+     * @param realAuthentication
+     */
+    public void setRealAuthentication(Authentication realAuthentication);
+    
+    /**
+     * Set the stored authentication held by the context
+     * 
+     * @param storedAuthentication
+     */
+    public void setStoredAuthentication(Authentication storedAuthentication);
+    
+}

source/java/org/alfresco/repo/security/authentication/AlfrescoSecureContextImpl.java

@@ -0,0 +1,184 @@
+/*
+ * Copyright (C) 2005-2007 Alfresco Software Limited.
+ *
+ * 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; either version 2
+ * of the License, or (at your option) any later version.
+
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+ * As a special exception to the terms and conditions of version 2.0 of 
+ * the GPL, you may redistribute this Program in connection with Free/Libre 
+ * and Open Source Software ("FLOSS") applications as described in Alfresco's 
+ * FLOSS exception.  You should have recieved a copy of the text describing 
+ * the FLOSS exception, and it is also available here: 
+ * http://www.alfresco.com/legal/licensing"
+ */
+package org.alfresco.repo.security.authentication;
+
+import net.sf.acegisecurity.Authentication;
+import net.sf.acegisecurity.context.ContextInvalidException;
+
+/**
+ * Hold an Alfresco extended security context
+ * 
+ * @author andyh
+ *
+ */
+public class AlfrescoSecureContextImpl implements AlfrescoSecureContext
+{
+    Authentication storedAuthentication;
+
+    Authentication realAuthentication;
+
+    Authentication effectiveAuthentication;
+
+    /**
+     * ACEGI
+     */
+    public Authentication getAuthentication()
+    {
+        return getEffectiveAuthentication();
+    }
+
+    /**
+     * ACEGI
+     */
+    public void setAuthentication(Authentication newAuthentication)
+    {
+        setEffectiveAuthentication(newAuthentication);
+        setRealAuthentication(newAuthentication);
+    }
+
+    /**
+     * ACEGI
+     */
+    public void validate() throws ContextInvalidException
+    {
+        if (effectiveAuthentication == null)
+        {
+            throw new ContextInvalidException("Effective authentication not set");
+        }
+    }
+
+    public Authentication getEffectiveAuthentication()
+    {
+        return effectiveAuthentication;
+    }
+
+    public Authentication getRealAuthentication()
+    {
+        return realAuthentication;
+    }
+
+    public Authentication getStoredAuthentication()
+    {
+        return storedAuthentication;
+    }
+
+    public void setEffectiveAuthentication(Authentication effictiveAuthentication)
+    {
+        this.effectiveAuthentication = effictiveAuthentication;
+    }
+
+    public void setRealAuthentication(Authentication realAuthentication)
+    {
+        this.realAuthentication = realAuthentication;
+    }
+
+    public void setStoredAuthentication(Authentication storedAuthentication)
+    {
+        this.storedAuthentication = storedAuthentication;
+    }
+
+    @Override
+    public int hashCode()
+    {
+        final int PRIME = 31;
+        int result = 1;
+        result = PRIME * result + ((effectiveAuthentication == null) ? 0 : effectiveAuthentication.hashCode());
+        result = PRIME * result + ((realAuthentication == null) ? 0 : realAuthentication.hashCode());
+        result = PRIME * result + ((storedAuthentication == null) ? 0 : storedAuthentication.hashCode());
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object obj)
+    {
+        if (this == obj)
+            return true;
+        if (obj == null)
+            return false;
+        if (getClass() != obj.getClass())
+            return false;
+        final AlfrescoSecureContextImpl other = (AlfrescoSecureContextImpl) obj;
+        if (effectiveAuthentication == null)
+        {
+            if (other.effectiveAuthentication != null)
+                return false;
+        }
+        else if (!effectiveAuthentication.equals(other.effectiveAuthentication))
+            return false;
+        if (realAuthentication == null)
+        {
+            if (other.realAuthentication != null)
+                return false;
+        }
+        else if (!realAuthentication.equals(other.realAuthentication))
+            return false;
+        if (storedAuthentication == null)
+        {
+            if (other.storedAuthentication != null)
+                return false;
+        }
+        else if (!storedAuthentication.equals(other.storedAuthentication))
+            return false;
+        return true;
+    }
+
+    @Override
+    public String toString()
+    {
+        StringBuilder builder = new StringBuilder();
+
+        if (realAuthentication == null)
+        {
+            builder.append("Real authenticaion = null");
+        }
+        else
+        {
+            builder.append("Real authenticaion = " + realAuthentication.toString());
+        }
+        builder.append(", ");
+        
+        if (effectiveAuthentication == null)
+        {
+            builder.append("Effective authenticaion = null");
+        }
+        else
+        {
+            builder.append("Effective authenticaion = " + effectiveAuthentication.toString());
+        }
+        builder.append(", ");
+        
+        if (storedAuthentication == null)
+        {
+            builder.append("Stored authenticaion = null");
+        }
+        else
+        {
+            builder.append("Stored authenticaion = " + storedAuthentication.toString());
+        }
+       
+        return builder.toString();
+    }
+
+}

source/java/org/alfresco/repo/security/authentication/AuthenticationUtil.java

@@ -79,16 +79,31 @@ public abstract class AuthenticationUtil
         return setCurrentUser(userName, getDefaultUserDetails(userName));
     }
 
+    public static Authentication setCurrentRealUser(String userName)
+    {
+        return setCurrentRealUser(userName, getDefaultUserDetails(userName));
+    }
+
+    public static Authentication setCurrentEffectiveUser(String userName)
+    {
+        return setCurrentEffectiveUser(userName, getDefaultUserDetails(userName));
+    }
+
+    public static Authentication setCurrentStoredUser(String userName)
+    {
+        return setCurrentStoredUser(userName, getDefaultUserDetails(userName));
+    }
+
     /**
      * Explicitly set the current user to be authenticated.
      * 
-     * @param userName - String user id
-     * @param providedDetails - provided details for the user
-     * 
+     * @param userName -
+     *            String user id
+     * @param providedDetails -
+     *            provided details for the user
      * @return Authentication
      */
-    public static Authentication setCurrentUser(String userName, UserDetails providedDetails)
-            throws AuthenticationException
+    public static Authentication setCurrentUser(String userName, UserDetails providedDetails) throws AuthenticationException
     {
         if (userName == null)
         {
@@ -96,6 +111,71 @@ public abstract class AuthenticationUtil
         }
 
         try
+        {
+            UsernamePasswordAuthenticationToken auth = getAuthenticationToken(userName, providedDetails);
+            return setCurrentAuthentication(auth);
+        }
+        catch (net.sf.acegisecurity.AuthenticationException ae)
+        {
+            throw new AuthenticationException(ae.getMessage(), ae);
+        }
+    }
+
+    public static Authentication setCurrentRealUser(String userName, UserDetails providedDetails) throws AuthenticationException
+    {
+        if (userName == null)
+        {
+            throw new AuthenticationException("Null user name");
+        }
+
+        try
+        {
+            UsernamePasswordAuthenticationToken auth = getAuthenticationToken(userName, providedDetails);
+            return setCurrentRealAuthentication(auth);
+        }
+        catch (net.sf.acegisecurity.AuthenticationException ae)
+        {
+            throw new AuthenticationException(ae.getMessage(), ae);
+        }
+    }
+
+    public static Authentication setCurrentEffectiveUser(String userName, UserDetails providedDetails) throws AuthenticationException
+    {
+        if (userName == null)
+        {
+            throw new AuthenticationException("Null user name");
+        }
+
+        try
+        {
+            UsernamePasswordAuthenticationToken auth = getAuthenticationToken(userName, providedDetails);
+            return setCurrentEffectiveAuthentication(auth);
+        }
+        catch (net.sf.acegisecurity.AuthenticationException ae)
+        {
+            throw new AuthenticationException(ae.getMessage(), ae);
+        }
+    }
+
+    public static Authentication setCurrentStoredUser(String userName, UserDetails providedDetails) throws AuthenticationException
+    {
+        if (userName == null)
+        {
+            throw new AuthenticationException("Null user name");
+        }
+
+        try
+        {
+            UsernamePasswordAuthenticationToken auth = getAuthenticationToken(userName, providedDetails);
+            return setCurrentStoredAuthentication(auth);
+        }
+        catch (net.sf.acegisecurity.AuthenticationException ae)
+        {
+            throw new AuthenticationException(ae.getMessage(), ae);
+        }
+    }
+
+    private static UsernamePasswordAuthenticationToken getAuthenticationToken(String userName, UserDetails providedDetails)
     {
         UserDetails ud = null;
         if (userName.equals(SYSTEM_USER_NAME))
@@ -121,16 +201,10 @@ public abstract class AuthenticationUtil
             }
         }
 
-            UsernamePasswordAuthenticationToken auth = new UsernamePasswordAuthenticationToken(ud, "", ud
-                    .getAuthorities());
+        UsernamePasswordAuthenticationToken auth = new UsernamePasswordAuthenticationToken(ud, "", ud.getAuthorities());
         auth.setDetails(ud);
         auth.setAuthenticated(true);
-            return setCurrentAuthentication(auth);
-        }
-        catch (net.sf.acegisecurity.AuthenticationException ae)
-        {
-            throw new AuthenticationException(ae.getMessage(), ae);
-        }
+        return auth;
     }
 
     /**
@@ -163,17 +237,18 @@ public abstract class AuthenticationUtil
         else
         {
             Context context = ContextHolder.getContext();
-            SecureContext sc = null;
-            if ((context == null) || !(context instanceof SecureContext))
+            AlfrescoSecureContext sc = null;
+            if ((context == null) || !(context instanceof AlfrescoSecureContext))
             {
-                sc = new SecureContextImpl();
+                sc = new AlfrescoSecureContextImpl();
                 ContextHolder.setContext(sc);
             }
             else
             {
-                sc = (SecureContext) context;
+                sc = (AlfrescoSecureContext) context;
             }
             authentication.setAuthenticated(true);
+            // Sets real and effective
             sc.setAuthentication(authentication);
 
             // Support for logging tenant domain / username (via log4j NDC)
@@ -211,6 +286,84 @@ public abstract class AuthenticationUtil
         }
     }
 
+    public static Authentication setCurrentRealAuthentication(Authentication authentication)
+    {
+        if (authentication == null)
+        {
+            clearCurrentSecurityContext();
+            return null;
+        }
+        else
+        {
+            Context context = ContextHolder.getContext();
+            AlfrescoSecureContext sc = null;
+            if ((context == null) || !(context instanceof AlfrescoSecureContext))
+            {
+                sc = new AlfrescoSecureContextImpl();
+                ContextHolder.setContext(sc);
+            }
+            else
+            {
+                sc = (AlfrescoSecureContext) context;
+            }
+            authentication.setAuthenticated(true);
+            sc.setRealAuthentication(authentication);
+            return authentication;
+        }
+    }
+
+    public static Authentication setCurrentEffectiveAuthentication(Authentication authentication)
+    {
+        if (authentication == null)
+        {
+            clearCurrentSecurityContext();
+            return null;
+        }
+        else
+        {
+            Context context = ContextHolder.getContext();
+            AlfrescoSecureContext sc = null;
+            if ((context == null) || !(context instanceof AlfrescoSecureContext))
+            {
+                sc = new AlfrescoSecureContextImpl();
+                ContextHolder.setContext(sc);
+            }
+            else
+            {
+                sc = (AlfrescoSecureContext) context;
+            }
+            authentication.setAuthenticated(true);
+            sc.setEffectiveAuthentication(authentication);
+            return authentication;
+        }
+    }
+
+    public static Authentication setCurrentStoredAuthentication(Authentication authentication)
+    {
+        if (authentication == null)
+        {
+            clearCurrentSecurityContext();
+            return null;
+        }
+        else
+        {
+            Context context = ContextHolder.getContext();
+            AlfrescoSecureContext sc = null;
+            if ((context == null) || !(context instanceof AlfrescoSecureContext))
+            {
+                sc = new AlfrescoSecureContextImpl();
+                ContextHolder.setContext(sc);
+            }
+            else
+            {
+                sc = (AlfrescoSecureContext) context;
+            }
+            authentication.setAuthenticated(true);
+            sc.setStoredAuthentication(authentication);
+            return authentication;
+        }
+    }
+
     /**
      * Get the current authentication context
      * 
@@ -218,13 +371,56 @@ public abstract class AuthenticationUtil
      * @throws AuthenticationException
      */
     public static Authentication getCurrentAuthentication() throws AuthenticationException
+    {
+        return getCurrentRealAuthentication();
+    }
+
+    /**
+     * Get the current real authentication context
+     * 
+     * @return Authentication
+     * @throws AuthenticationException
+     */
+    public static Authentication getCurrentRealAuthentication() throws AuthenticationException
     {
         Context context = ContextHolder.getContext();
-        if ((context == null) || !(context instanceof SecureContext))
+        if ((context == null) || !(context instanceof AlfrescoSecureContext))
         {
             return null;
         }
-        return ((SecureContext) context).getAuthentication();
+        return ((AlfrescoSecureContext) context).getRealAuthentication();
+    }
+
+    /**
+     * Get the current effective authentication context
+     * 
+     * @return Authentication
+     * @throws AuthenticationException
+     */
+    public static Authentication getCurrentEffectiveAuthentication() throws AuthenticationException
+    {
+        Context context = ContextHolder.getContext();
+        if ((context == null) || !(context instanceof AlfrescoSecureContext))
+        {
+            return null;
+        }
+        return ((AlfrescoSecureContext) context).getEffectiveAuthentication();
+    }
+
+    /**
+     * Get the current stored authentication context
+     * 
+     * @return Authentication
+     * @throws AuthenticationException
+     */
+    public static Authentication getCurrentStoredAuthentication() throws AuthenticationException
+    {
+        Context context = ContextHolder.getContext();
+        if ((context == null) || !(context instanceof AlfrescoSecureContext))
+        {
+            return null;
+        }
+        return ((AlfrescoSecureContext) context).getStoredAuthentication();
     }
 
     /**
@@ -234,13 +430,53 @@ public abstract class AuthenticationUtil
      * @throws AuthenticationException
      */
     public static String getCurrentUserName() throws AuthenticationException
+    {
+        return getCurrentRealUserName();
+    }
+
+    public static String getCurrentRealUserName() throws AuthenticationException
     {
         Context context = ContextHolder.getContext();
-        if ((context == null) || !(context instanceof SecureContext))
+        if ((context == null) || !(context instanceof AlfrescoSecureContext))
         {
             return null;
         }
-        return getUserName(((SecureContext) context).getAuthentication());
+        AlfrescoSecureContext ctx = (AlfrescoSecureContext) context;
+        if (ctx.getRealAuthentication() == null)
+        {
+            return null;
+        }
+        return getUserName(ctx.getRealAuthentication());
+    }
+
+    public static String getCurrentEffectiveUserName() throws AuthenticationException
+    {
+        Context context = ContextHolder.getContext();
+        if ((context == null) || !(context instanceof AlfrescoSecureContext))
+        {
+            return null;
+        }
+        AlfrescoSecureContext ctx = (AlfrescoSecureContext) context;
+        if (ctx.getEffectiveAuthentication() == null)
+        {
+            return null;
+        }
+        return getUserName(ctx.getEffectiveAuthentication());
+    }
+
+    public static String getCurrentStoredUserName() throws AuthenticationException
+    {
+        Context context = ContextHolder.getContext();
+        if ((context == null) || !(context instanceof AlfrescoSecureContext))
+        {
+            return null;
+        }
+        AlfrescoSecureContext ctx = (AlfrescoSecureContext) context;
+        if (ctx.getStoredAuthentication() == null)
+        {
+            return null;
+        }
+        return getUserName(ctx.getStoredAuthentication());
     }
 
     /**
@@ -304,33 +540,42 @@ public abstract class AuthenticationUtil
     }
 
     /**
-     * Execute a unit of work as a given user.  The thread's authenticated user will be
-     * returned to its normal state after the call.
+     * Execute a unit of work as a given user. The thread's authenticated user will be returned to its normal state
+     * after the call.
      * 
-     * @param runAsWork     the unit of work to do
-     * @param uid           the user ID
+     * @param runAsWork
+     *            the unit of work to do
+     * @param uid
+     *            the user ID
      * @return Returns the work's return value
      */
     public static <R> R runAs(RunAsWork<R> runAsWork, String uid)
     {
-        String currentUser = AuthenticationUtil.getCurrentUserName();
+        String effectiveUser = AuthenticationUtil.getCurrentEffectiveUserName();
+        String realUser = AuthenticationUtil.getCurrentRealUserName();
 
         R result = null;
         try
         {
-            if ((currentUser != null) && (isMtEnabled()))
+
+            if ((realUser != null) && (isMtEnabled()))
             {
-                int idx = currentUser.indexOf(TenantService.SEPARATOR);
-            if ((idx != -1) && (idx < (currentUser.length()-1)))
+                int idx = realUser.indexOf(TenantService.SEPARATOR);
+                if ((idx != -1) && (idx < (realUser.length() - 1)))
                 {
                     if (uid.equals(AuthenticationUtil.getSystemUserName()))
                     {
-                        uid = uid + TenantService.SEPARATOR + currentUser.substring(idx+1);
+                        uid = uid + TenantService.SEPARATOR + realUser.substring(idx + 1);
                     }
                 }
             }
 
-            AuthenticationUtil.setCurrentUser(uid);
+            if (realUser == null)
+            {
+                AuthenticationUtil.setCurrentRealUser(uid);
+            }
+            AuthenticationUtil.setCurrentEffectiveUser(uid);
+
             result = runAsWork.doWork();
             return result;
         }
@@ -349,10 +594,13 @@ public abstract class AuthenticationUtil
         }
         finally
         {
-            AuthenticationUtil.clearCurrentSecurityContext();
-            if (currentUser != null)
+            if (realUser == null)
             {
-                AuthenticationUtil.setCurrentUser(currentUser);
+                AuthenticationUtil.clearCurrentSecurityContext();
+            }
+            else
+            {
+                AuthenticationUtil.setCurrentEffectiveUser(effectiveUser);
             }
         }
     }

source/java/org/alfresco/repo/security/permissions/impl/PermissionServiceImpl.java

@@ -392,9 +392,19 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
             perm = permIn;
         }
 
+        if(AuthenticationUtil.getCurrentEffectiveUserName() == null)
+        {
+            return AccessStatus.DENIED;
+        }
+        
+        if(AuthenticationUtil.getCurrentEffectiveUserName().equals(AuthenticationUtil.getSystemUserName()))
+        {
+            return AccessStatus.ALLOWED;
+        }
+        
         // Get the current authentications
         // Use the smart authentication cache to improve permissions performance
-        Authentication auth = authenticationComponent.getCurrentAuthentication();
+        Authentication auth = AuthenticationUtil.getCurrentEffectiveAuthentication();
         final Set<String> authorisations = getAuthorisations(auth, nodeRef);
 
         // If the node does not support the given permission there is no point
@@ -496,9 +506,19 @@ public class PermissionServiceImpl implements PermissionServiceSPI, Initializing
             return AccessStatus.DENIED;
         }
 
+        if(AuthenticationUtil.getCurrentEffectiveUserName() == null)
+        {
+            return AccessStatus.DENIED;
+        }
+        
+        if(AuthenticationUtil.getCurrentEffectiveUserName().equals(AuthenticationUtil.getSystemUserName()))
+        {
+            return AccessStatus.ALLOWED;
+        }
+        
         // Get the current authentications
         // Use the smart authentication cache to improve permissions performance
-        Authentication auth = authenticationComponent.getCurrentAuthentication();
+        Authentication auth = AuthenticationUtil.getCurrentEffectiveAuthentication();
         if (auth == null)
         {
             throw new IllegalStateException("Unauthenticated");

source/java/org/alfresco/repo/security/permissions/impl/PermissionServiceTest.java

@@ -89,6 +89,34 @@ public class PermissionServiceTest extends AbstractPermissionTest
         allowAndyReadChildren = new SimplePermissionEntry(rootNodeRef, getPermission(PermissionService.READ_CHILDREN), "andy", AccessStatus.ALLOWED);
     }
 
+    public void testRunAsRealAndEffectiveUsers()
+    {
+        runAs("admin");
+
+        final NodeRef n1 = nodeService.createNode(rootNodeRef, ContentModel.ASSOC_CHILDREN, QName.createQName("{namespace}one"), ContentModel.TYPE_FOLDER).getChildRef();
+
+        runAs("andy");
+        assertTrue(permissionService.hasPermission(n1, getPermission(PermissionService.CONTRIBUTOR)) == AccessStatus.DENIED);
+        
+        assertEquals("andy", AuthenticationUtil.getCurrentRealUserName());
+        assertEquals("andy", AuthenticationUtil.getCurrentEffectiveUserName());
+        
+        AuthenticationUtil.runAs(new AuthenticationUtil.RunAsWork<Object>() {
+
+            public Object doWork() throws Exception
+            {
+                assertTrue(permissionService.hasPermission(n1, getPermission(PermissionService.CONTRIBUTOR)) == AccessStatus.ALLOWED);
+                
+                assertEquals("andy", AuthenticationUtil.getCurrentRealUserName());
+                assertEquals("admin", AuthenticationUtil.getCurrentEffectiveUserName());
+                return null;
+            }}, "admin");
+        
+        assertEquals("andy", AuthenticationUtil.getCurrentRealUserName());
+        assertEquals("andy", AuthenticationUtil.getCurrentEffectiveUserName());
+
+    }
+    
     public void testDefaultModelPermissions()
     {
         runAs("admin");