GUAC-1126: Allow non-admins to see active connections if they have READ permission to those connections.

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/activeconnection/ActiveConnectionPermissionService.java

@@ -88,20 +88,22 @@ public class ActiveConnectionPermissionService
         if (canReadPermissions(user, targetUser)) {
 
             // Only administrators may access active connections
-            if (!targetUser.isAdministrator())
-                return Collections.EMPTY_SET;
+            boolean isAdmin = targetUser.isAdministrator();
 
             // Get all active connections
             Collection<ActiveConnectionRecord> records = tunnelService.getActiveConnections(user);
 
-            // We have READ and DELETE on all active connections
+            // We have READ, and possibly DELETE, on all active connections
             Set<ObjectPermission> permissions = new HashSet<ObjectPermission>();
             for (ActiveConnectionRecord record : records) {
 
-                // Add implicit READ and DELETE
+                // Add implicit READ
                 String identifier = record.getUUID().toString();
-                permissions.add(new ObjectPermission(ObjectPermission.Type.READ,   identifier));
-                permissions.add(new ObjectPermission(ObjectPermission.Type.DELETE, identifier));
+                permissions.add(new ObjectPermission(ObjectPermission.Type.READ, identifier));
+
+                // If we're and admin, then we also have DELETE
+                if (isAdmin)
+                    permissions.add(new ObjectPermission(ObjectPermission.Type.DELETE, identifier));
 
             }
 

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/activeconnection/ActiveConnectionService.java

@@ -26,6 +26,7 @@ import com.google.inject.Inject;
 import com.google.inject.Provider;
 import java.util.ArrayList;
 import java.util.Collection;
+import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
 import org.glyptodon.guacamole.auth.jdbc.user.AuthenticatedUser;
@@ -62,35 +63,42 @@ public class ActiveConnectionService
     public TrackedActiveConnection retrieveObject(AuthenticatedUser user,
             String identifier) throws GuacamoleException {
 
-        // Only administrators may retrieve active connections
-        if (!user.getUser().isAdministrator())
-            throw new GuacamoleSecurityException("Permission denied.");
+        // Pull objects having given identifier
+        Collection<TrackedActiveConnection> objects = retrieveObjects(user, Collections.singleton(identifier));
 
-        // Retrieve record associated with requested connection
-        ActiveConnectionRecord record = tunnelService.getActiveConnection(user, identifier);
-        if (record == null)
+        // If no such object, return null
+        if (objects.isEmpty())
             return null;
 
-        // Return tracked active connection using retrieved record
-        TrackedActiveConnection activeConnection = trackedActiveConnectionProvider.get();
-        activeConnection.init(user, record);
-        return activeConnection;
-        
+        // The object collection will have exactly one element unless the
+        // database has seriously lost integrity
+        assert(objects.size() == 1);
+
+        // Return first and only object
+        return objects.iterator().next();
+
     }
     
     @Override
     public Collection<TrackedActiveConnection> retrieveObjects(AuthenticatedUser user,
             Collection<String> identifiers) throws GuacamoleException {
 
-        // Build list of all active connections with given identifiers
-        Collection<TrackedActiveConnection> activeConnections = new ArrayList<TrackedActiveConnection>(identifiers.size());
-        for (String identifier : identifiers) {
+        Set<String> identifierSet = new HashSet<String>(identifiers);
 
-            // Add connection to list if it exists
-            TrackedActiveConnection activeConnection = retrieveObject(user, identifier);
-            if (activeConnection != null)
+        // Retrieve all visible connections (permissions enforced by tunnel service)
+        Collection<ActiveConnectionRecord> records = tunnelService.getActiveConnections(user);
+
+        // Restrict to subset of records which match given identifiers
+        Collection<TrackedActiveConnection> activeConnections = new ArrayList<TrackedActiveConnection>(identifiers.size());
+        for (ActiveConnectionRecord record : records) {
+
+            // Add connection if within requested identifiers
+            if (identifierSet.contains(record.getUUID().toString())) {
+                TrackedActiveConnection activeConnection = trackedActiveConnectionProvider.get();
+                activeConnection.init(user, record);
                 activeConnections.add(activeConnection);
-            
+            }
+
         }
 
         return activeConnections;
@@ -101,6 +109,10 @@ public class ActiveConnectionService
     public void deleteObject(AuthenticatedUser user, String identifier)
         throws GuacamoleException {
 
+        // Only administrators may delete active connections
+        if (!user.getUser().isAdministrator())
+            throw new GuacamoleSecurityException("Permission denied.");
+
         // Close connection, if it exists (and we have permission)
         ActiveConnection activeConnection = retrieveObject(user, identifier);
         if (activeConnection != null) {

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/tunnel/AbstractGuacamoleTunnelService.java

@@ -28,8 +28,10 @@ import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Date;
+import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.atomic.AtomicBoolean;
 import org.glyptodon.guacamole.auth.jdbc.user.AuthenticatedUser;
@@ -448,24 +450,33 @@ public abstract class AbstractGuacamoleTunnelService implements GuacamoleTunnelS
     public Collection<ActiveConnectionRecord> getActiveConnections(AuthenticatedUser user)
         throws GuacamoleException {
 
-        // Only administrators may see all active connections
-        if (!user.getUser().isAdministrator())
+        // Simply return empty list if there are no active tunnels
+        Collection<ActiveConnectionRecord> records = activeTunnels.values();
+        if (records.isEmpty())
             return Collections.EMPTY_LIST;
 
-        return Collections.unmodifiableCollection(activeTunnels.values());
+        // Build set of all connection identifiers associated with active tunnels
+        Set<String> identifiers = new HashSet<String>(records.size());
+        for (ActiveConnectionRecord record : records)
+            identifiers.add(record.getConnection().getIdentifier());
 
-    }
+        // Produce collection of readable connection identifiers
+        Collection<ConnectionModel> connections = connectionMapper.selectReadable(user.getUser().getModel(), identifiers);
 
-    @Override
-    public ActiveConnectionRecord getActiveConnection(AuthenticatedUser user,
-            String tunnelUUID) throws GuacamoleException {
+        // Ensure set contains only identifiers of readable connections
+        identifiers.clear();
+        for (ConnectionModel connection : connections)
+            identifiers.add(connection.getIdentifier());
 
-        // Only administrators may see all active connections
-        if (!user.getUser().isAdministrator())
-            return null;
+        // Produce readable subset of records
+        Collection<ActiveConnectionRecord> visibleRecords = new ArrayList<ActiveConnectionRecord>(records.size());
+        for (ActiveConnectionRecord record : records) {
+            if (identifiers.contains(record.getConnection().getIdentifier()))
+                visibleRecords.add(record);
+        }
+
+        return visibleRecords;
 
-        return activeTunnels.get(tunnelUUID);
-        
     }
 
     @Override

extensions/guacamole-auth-jdbc/modules/guacamole-auth-jdbc-base/src/main/java/org/glyptodon/guacamole/auth/jdbc/tunnel/GuacamoleTunnelService.java

@@ -59,30 +59,6 @@ public interface GuacamoleTunnelService {
     public Collection<ActiveConnectionRecord> getActiveConnections(AuthenticatedUser user)
             throws GuacamoleException;
 
-    /**
-     * Returns the connection records representing the connection associated
-     * with the tunnel having the given UUID, if that connection is visible to
-     * the given user.
-     *
-     * @param user
-     *     The user retrieving the active connection.
-     * 
-     * @param tunnelUUID
-     *     The UUID of the tunnel associated with the active connection being
-     *     retrieved.
-     *
-     * @return
-     *     The active connection associated with the tunnel having the given
-     *     UUID, or null if no such connection exists.
-     *
-     * @throws GuacamoleException
-     *     If an error occurs while retrieving all active connections, or if
-     *     permission is denied.
-     */
-    public ActiveConnectionRecord getActiveConnection(AuthenticatedUser user,
-            String tunnelUUID)
-            throws GuacamoleException;
-
     /**
      * Creates a socket for the given user which connects to the given
      * connection. The given client information will be passed to guacd when