- All Implemented Interfaces:
Serializable
,Guard
public final class ServicePermission extends Permission implements Serializable
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
KerberosPrincipal
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.
Granting this permission also implies creating KerberosPrincipal
or GSSName
without providing a Kerberos
realm, as long as the permission's service principal is in this realm.
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
Constructors Constructor Description ServicePermission(String servicePrincipal, String action)
Create a newServicePermission
with the specifiedservicePrincipal
andaction
. -
Method Summary
Modifier and Type Method Description boolean
equals(Object obj)
Checks two ServicePermission objects for equality.String
getActions()
Returns the canonical string representation of the actions.int
hashCode()
Returns the hash code value for this object.boolean
implies(Permission p)
Checks if this Kerberos service permission object "implies" the specified permission.PermissionCollection
newPermissionCollection()
Returns a PermissionCollection object for storing ServicePermission objects.Methods declared in class java.security.Permission
checkGuard, getName, toString
-
Constructor Details
-
ServicePermission
Create a newServicePermission
with the specifiedservicePrincipal
andaction
.- Parameters:
servicePrincipal
- the name of the service principal. An asterisk may appear by itself, to signify any service principal.action
- the action string
-
-
Method Details
-
implies
Checks if this Kerberos service permission object "implies" the specified permission.More specifically, this method returns true if all of the following are true (and returns false if any of them are not):
- p is an instanceof
ServicePermission
, - p's actions are a proper subset of this
ServicePermission
's actions, - p's name is equal to this
ServicePermission
's name or thisServicePermission
's name is "*".
- Specified by:
implies
in classPermission
- Parameters:
p
- the permission to check against.- Returns:
- true if the specified permission is implied by this object, false if not.
- p is an instanceof
-
equals
Checks two ServicePermission objects for equality.- Specified by:
equals
in classPermission
- 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()
,HashMap
-
hashCode
public int hashCode()Returns the hash code value for this object.- Specified by:
hashCode
in classPermission
- Returns:
- a hash code value for this object.
- See Also:
Object.equals(java.lang.Object)
,System.identityHashCode(java.lang.Object)
-
getActions
Returns the canonical string representation of the actions. Always returns present actions in the following order: initiate, accept.- Specified by:
getActions
in classPermission
- Returns:
- the actions of this Permission.
-
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 classPermission
- Returns:
- a new PermissionCollection object suitable for storing ServicePermissions.
-