Home » openjdk-7 » javax.security » auth » kerberos » [javadoc | source]
javax.security.auth.kerberos
public final class: ServicePermission [javadoc | source]
java.lang.Object
   java.security.Permission
      javax.security.auth.kerberos.ServicePermission

All Implemented Interfaces:
    Serializable, Guard

This class is used to protect Kerberos services and the credentials necessary to access those services. There is a one to one mapping of a service principal and the credentials necessary to access the service. Therefore granting access to a service principal implicitly grants access to the credential necessary to establish a security context with the service principal. This applies regardless of whether the credentials are in a cache or acquired via an exchange with the KDC. The credential can be either a ticket granting ticket, a service ticket or a secret key from a key table.

A ServicePermission contains a service principal name and a list of actions which specify the context the credential can be used within.

The service principal name is the canonical name of the KereberosPrincipal supplying the service, that is the KerberosPrincipal represents a Kerberos service principal. This name is treated in a case sensitive manner. An asterisk may appear by itself, to signify any service principal.

Granting this permission implies that the caller can use a cached credential (TGT, service ticket or secret key) within the context designated by the action. In the case of the TGT, granting this permission also implies that the TGT can be obtained by an Authentication Service exchange.

The possible actions are:

   initiate -              allow the caller to use the credential to
                           initiate a security context with a service
                           principal.

   accept -                allow the caller to use the credential to
                           accept security context as a particular
                           principal.
For example, to specify the permission to access to the TGT to initiate a security context the permission is constructed as follows:

    ServicePermission("krbtgt/EXAMPLE.COM@EXAMPLE.COM", "initiate");

To obtain a service ticket to initiate a context with the "host" service the permission is constructed as follows:

    ServicePermission("host/foo.example.com@EXAMPLE.COM", "initiate");

For a Kerberized server the action is "accept". For example, the permission necessary to access and use the secret key of the Kerberized "host" service (telnet and the likes) would be constructed as follows:

    ServicePermission("host/foo.example.com@EXAMPLE.COM", "accept");
Constructor:
 public ServicePermission(String servicePrincipal,
    String action) 
    Create a new ServicePermission with the specified servicePrincipal and action.
    Parameters:
    servicePrincipal - the name of the service principal. An asterisk may appear by itself, to signify any service principal.


    action - the action string
Method from javax.security.auth.kerberos.ServicePermission Summary:
equals,   getActions,   getMask,   hashCode,   implies,   impliesIgnoreMask,   newPermissionCollection
Methods from java.security.Permission:
checkGuard,   equals,   getActions,   getName,   hashCode,   implies,   newPermissionCollection,   toString
Methods from java.lang.Object:
clone,   equals,   finalize,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait
Method from javax.security.auth.kerberos.ServicePermission Detail:
 public boolean equals(Object obj) 
    Checks two ServicePermission objects for equality.

 public String getActions() 
    Returns the canonical string representation of the actions. Always returns present actions in the following order: initiate, accept.
 int getMask() 
    Return the current action mask.
 public int hashCode() 
    Returns the hash code value for this object.
 public boolean implies(Permission p) 
    Checks if this Kerberos service permission object "implies" the specified permission.

    If none of the above are true, implies returns false.

 boolean impliesIgnoreMask(ServicePermission p) 
 public PermissionCollection newPermissionCollection() 
    Returns a PermissionCollection object for storing ServicePermission objects.
    ServicePermission objects must be stored in a manner that allows them to be inserted into the collection in any order, but that also enables the PermissionCollection implies method to be implemented in an efficient (and consistent) manner.