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java.lang.Objectjava.security.Permission
javax.security.auth.kerberos.ServicePermission
public final class ServicePermission
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.
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 Summary | |
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ServicePermission(java.lang.String servicePrinicipal,
java.lang.String action)
Create a new ServicePermission with the specified
servicePrincipal and action . |
Method Summary | |
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boolean |
equals(java.lang.Object obj)
Checks two ServicePermission objects for equality. |
java.lang.String |
getActions()
Returns the canonical string representation of the actions. |
int |
hashCode()
Returns the hash code value for this object. |
boolean |
implies(java.security.Permission p)
Checks if this Kerberos service permission object "implies" the specified permission. |
java.security.PermissionCollection |
newPermissionCollection()
Returns a PermissionCollection object for storing ServicePermission objects. |
Methods inherited from class java.security.Permission |
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checkGuard, getName, toString |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ServicePermission(java.lang.String servicePrinicipal, java.lang.String action)
ServicePermission
with the specified
servicePrincipal
and action
.
servicePrinicipal
- the name of the service principal action
- the action stringMethod Detail |
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public boolean implies(java.security.Permission p)
If none of the above are true, implies
returns false.
implies
in class java.security.Permission
p
- the permission to check against.
public boolean equals(java.lang.Object obj)
equals
in class java.security.Permission
obj
- the object to test for equality with this object.
public int hashCode()
hashCode
in class java.security.Permission
public java.lang.String getActions()
getActions
in class java.security.Permission
public java.security.PermissionCollection newPermissionCollection()
newPermissionCollection
in class java.security.Permission
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