iaik.tc.tss.impl.java.tsp
Class TcMonotonicCtr

java.lang.Object
  iaik.tc.tss.impl.java.tsp.TcAttributes
      iaik.tc.tss.impl.java.tsp.TcWorkingObject
          iaik.tc.tss.impl.java.tsp.TcAuthObject
              iaik.tc.tss.impl.java.tsp.TcMonotonicCtr

All Implemented Interfaces:

TcIAttributes, TcIAuthObject, TcIMonotonicCtr, TcIWorkingObject

public class TcMonotonicCtr
extends TcAuthObject
implements TcIMonotonicCtr

Author:

tpm

Method Summary

void	changeAuth(TcIAuthObject parentObject, TcIPolicy newPolicy) This method changes the authorization data (secret) of an entity (object) and assigns the object to the newPolicy object.
java.lang.Object[]	createCtr(TcBlobData label) This method creates the counter with the label provided.
java.lang.Object	incrementCtr() This method increments a previously defined counter.
long	readCtr() This method reads the counter value.
void	releaseCtr() This method releases the counter.

Methods inherited from class iaik.tc.tss.impl.java.tsp.TcAuthObject

changeAuthAsym, getPolicyObject, getUsagePolicyObject

Methods inherited from class iaik.tc.tss.impl.java.tsp.TcAttributes

getAttribData, getAttribUint32, setAttribData, setAttribUint32

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface iaik.tc.tss.api.tspi.TcIAttributes

getAttribData, getAttribUint32, setAttribData, setAttribUint32

Methods inherited from interface iaik.tc.tss.api.tspi.TcIAuthObject

changeAuthAsym, getPolicyObject, getUsagePolicyObject

Method Detail

releaseCtr

public void releaseCtr()
                throws TcTssException

This method releases the counter. Note that this command requires owner authorization which can be set via the usage policy of the TPM object.

Specified by:

releaseCtr in interface TcIMonotonicCtr

Throws:

TcTssException

TSS Spec. 1.2 Errata A, page number:

383

incrementCtr

public java.lang.Object incrementCtr()
                              throws TcTssException

This method increments a previously defined counter. A policy object must be assigned to this object; the authData within the policy object will be used to authorize this operation.

Specified by:

incrementCtr in interface TcIMonotonicCtr

Returns:

The new TcTpmCounterValue post increment

Throws:

TcTssException

TSS Spec. 1.2 Errata A, page number:

384

readCtr

public long readCtr()
             throws TcTssException

This method reads the counter value.

Specified by:

readCtr in interface TcIMonotonicCtr

Returns:

The current value of the counter

Throws:

TcTssException

createCtr

public java.lang.Object[] createCtr(TcBlobData label)
                             throws TcTssException

Description copied from interface: TcIMonotonicCtr

This method creates the counter with the label provided. Note that this command requires owner authorization which can be set via the usage policy of the TPM object.

Specified by:

createCtr in interface TcIMonotonicCtr

Parameters:

label - The label value used to identify this counter

Returns:

0 ... The handle for the counter (Long) 1 ... The starting counter value (TcTpmCounterValue)

Throws:

TcTssException

changeAuth

public void changeAuth(TcIAuthObject parentObject,
                       TcIPolicy newPolicy)
                throws TcTssException

Description copied from interface: TcIAuthObject

This method changes the authorization data (secret) of an entity (object) and assigns the object to the newPolicy object. All classes using secrets provide this method for changing their authorization data. To change the TPM owner authorization, this method has to be called on the TPM object. The parent has to be set to null. To change the SRK authorization, this method has to be called on the SRK key object and the parent has to be set to the TPM object.

Specified by:

changeAuth in interface TcIAuthObject

Parameters:

parentObject - The parent object wrapping this object.

newPolicy - Policy object providing the new authorization data.

Throws:

TcTssException