/**
* Copyright (c) 2011, Thilo Planz. All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package v7db.files;
import java.util.Properties;
import org.apache.commons.lang3.ArrayUtils;
import v7db.auth.AuthenticationToken;
import v7db.files.mongodb.V7File;
class AclAuthorisationProvider implements AuthorisationProvider {
private final GlobalAuthorisationProvider global;
public AclAuthorisationProvider(Properties props) {
global = new GlobalAuthorisationProvider(props);
}
private Boolean authorise(V7File resource, AuthenticationToken user,
String permission) {
Object[] roles = global.getRoles(user);
if (roles == null)
return false;
Object[] acl = resource.getEffectiveAcl(permission);
if (acl == null)
return null;
for (Object role : roles) {
if (ArrayUtils.contains(acl, role))
return true;
}
return false;
}
public boolean authoriseOpen(V7File resource, AuthenticationToken user) {
Object[] acl = resource.getAcl("open");
if (acl == null) {
// no ACL set at all,
// inherit from parent
V7File parent = resource.getParent();
if (parent != null)
return authoriseOpen(parent, user);
return global.authoriseOpen(resource, user);
}
if (acl.length == 0) {
// "open" not set, default to "read" (which must be set)
return authoriseRead(resource, user);
}
Boolean result = authorise(resource, user, "open");
if (result == null)
return global.authoriseRead(resource, user);
return result;
}
public boolean authoriseRead(V7File resource, AuthenticationToken user) {
V7File parent = resource.getParent();
if (parent != null) {
if (!authoriseOpen(parent, user))
return false;
}
Boolean result = authorise(resource, user, "read");
if (result == null)
return global.authoriseRead(resource, user);
return result;
}
public boolean authoriseWrite(V7File resource, AuthenticationToken user) {
V7File parent = resource.getParent();
if (parent != null) {
if (!authoriseOpen(parent, user))
return false;
}
Boolean result = authorise(resource, user, "write");
if (result == null)
return global.authoriseRead(resource, user);
return result;
}
}