Just get some feedback on this potential remote policy service. The
main
intent here is to provide a secure centralised policy administrator to
simplify java security policy management for a djinn group. Note
this is
new work, so it doesn't yet support encrypted policy files.
I've used code from Apache Harmony to parse standard syntax java policy
files.
Cheers,
Peter.
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package org.apache.river.api.security;
import java.io.IOException;
import net.jini.security.GrantPermission;
import net.jini.security.policy.UmbrellaGrantPermission;
import org.apache.river.impl.security.policy.util.PolicyParser;
import org.apache.river.impl.security.policy.util.DefaultPolicyParser;
import org.apache.river.impl.security.policy.util.DefaultPolicyScanner;
/**
* RemotePolicy is a service implemented by a Policy Provider, that
allows
* the java security Policy to be updated remotely by a djinn group
administrator.
*
* For security purposes, only secure jeri Endpoint's should be used
and must
* require client and server authentication, in addition the proxy
must be a
* reflective proxy only, DownloadPermission should not be granted,
which is
* also beneficial to reduced network load at the administrator
client. *
RemotePolicy may be submitted to a lookup service, where an
administrator
* client will look it up and replace PermissionGrant's periodically.
*
* To reduce network load, the administrator client may delay updates by
* lazily processing updates in a serial manner. New RemotePolicy
services
* obtained by the administrator client's via RemoteEvent
notification should
* be processed as a priority over policy updates. Eventually a
djinn group
* policy should reach equilibrium where all nodes have had their
policy's
* updated.
*
* This policy, in addition to any local policy provider, allows a
network
djinn
* administrator to provide a list of PermissionGrant's, from a
single or
* replicated remote location, distributed to all nodes in a djinn
group the
* administrator is responsible for.
*
* In addition, replicating administrator clients may register a pseudo
RemotePolicy
* in order to track the primary administrator client and take over
in the
* event it fails. Failure may be failure to authenticate or failure to
renew
* a Lease.
*
* RemotePolicy, if it encapsulates an underlying RemotePolicy, does not
* delegate updates to the base RemotePolicy, this is in case an
* implementer wants a number of different layers of RemotePolicy, where
* each layer represents a different administrator role or
responsibility. *
The administrator's subject must hold the necessary permissions in
order
* to grant them, including RuntimePermission("getProtectionDomain").
*
* A node may join more than one djinn group, in this case
RemotePolicy's may
* be used as nested basePolicy's.
*
* The intent of RemotePolicy is to simplify granting of
DowloadPermission to
* new signer Certificates and adding new Principals and Permission's to
* distributed policy providers.
*
* Local policy files should be used to restrict the Permissions
grantable
* via a RemotePolicy.
*
* PermissionGrant's that are replaced and no longer exist in the
RemotePolicy
* will no longer be implied by the policy.
*
* DefaultPolicyParser has been provided for an administrator client to
* parse standard java format policy file's, to create PermissionGrant's
* custom policy file formats may be used by extending
DefaultPolicyScanner.
*
* @author Peter Firmstone
* @see GrantPermission
* @see UmbrellaGrantPermission
* @see PolicyParser
* @see DefaultPolicyParser
* @see DefaultPolicyScanner
*/
public interface RemotePolicy {
/**
* Replaces the existing RemotePolicy's PermissionGrant's.
*
* The array is defensively copied, the caller, must have
* RuntimePermission("getProtectionDomain")
* as well as GrantPermission or UmbrellaGrantPermission for every
* Permission granted by each PermissionGrant.
*
* In this case the caller will be the client Subject.
*
* These Permissions should be set in the local policy files at the
* RemotePolicy server.
*
* @param policyPermissions
* @throws java.io.IOException
*/
public void replace(PermissionGrant[] policyPermissions) throws
IOException;
}
