JavaTM 2 Platform Std. Ed. v1.6.0
javax.security.auth.kerberos
Class ServicePermission
java.lang.Object
java.security.Permission
javax.security.auth.kerberos.ServicePermission
- All Implemented Interfaces:
- Serializable, Guard
public final class ServicePermission - extends Permission
- implements Serializable
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");
- Since:
- 1.4
- See Also:
- Serialized Form
Constructor Summary |
ServicePermission(String servicePrincipal,
String action)
Create a new ServicePermission
with the specified servicePrincipal
and action . |
ServicePermission
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
implies
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.
- Specified by:
implies in class Permission
- Parameters:
p - the permission to check against.
- Returns:
- true if the specified permission is implied by this object,
false if not.
equals
public boolean equals(Object obj)
- Checks two ServicePermission objects for equality.
- Specified by:
equals in class Permission
- Parameters:
obj - the object to test for equality with this object.
- Returns:
- true if obj is a ServicePermission, and has the
same service principal, and actions as this
ServicePermission object.
- See Also:
Object.hashCode() ,
Hashtable
hashCode
public int hashCode()
- Returns the hash code value for this object.
- Specified by:
hashCode in class Permission
- Returns:
- a hash code value for this object.
- See Also:
Object.equals(java.lang.Object) ,
Hashtable
getActions
public String getActions()
- Returns the canonical string representation of the actions.
Always returns present actions in the following order:
initiate, accept.
- Specified by:
getActions in class Permission
- Returns:
- the actions of this Permission.
newPermissionCollection
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.
- Overrides:
newPermissionCollection in class Permission
- Returns:
- a new PermissionCollection object suitable for storing
ServicePermissions.
Copyright 2003 Sun Microsystems, Inc. All rights reserved
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