Re: [Trustedjava-support] NullPointerException in TcIRsaKey.certifiyKey()

[Mudassar A. <mud...@ho...>]

Hi

Well, I tried to step in and find out that just before generating NULL POINTER exception, following exception occured:

java.lang.ClassCastException: iaik.tc.tss.api.structs.tpm.TcTpmCertifyInfo2 cannot be cast to iaik.tc.tss.api.structs.tpm.TcTpmCertifyInfo

Give me some reason to think that my key attributes are causing TcTpmCertifyInfo2 structure to be returned (see TSS note below). If I specify OTHER key attributes so that TcTpmCertifyInfo structure is returned then I might not get exception. Currently I am using following key attributes:

public static final long BIND_KEY_ATTRIBUTES =    TcTssConstants.TSS_KEY_TYPE_BIND
                                                |     TcTssConstants.TSS_KEY_SIZE_2048                                                                    
                                                |   TcTssConstants.TSS_KEY_VOLATILE                                                
                                                |   TcTssConstants.TSS_KEY_NOT_MIGRATABLE;


Any suggestion on the possible key attributes combination?


***********************************************
TCG SOFTWARE STACK (TSS) SPECIFICATION  : PAGE 320
***********************************************
pValidationData
Pointer addresses a TSS_VALIDATION structure. After successful
completion of the call the member rgbValidationData of this structure
contains the signature data of the command. The member prgbData of the
structure points to a buffer containing a TCPA_CERTIFY_INFO2 data
stream as specified within the TCG TPM 1.2 Main Specification or a
TCPA_CERTIFY_INFO data stream as specified within the TCG 1.1b Main
Specification.
TCPA_CERTIFY_INFO2: On TPM v1.2 with usage of CMK keys and keys
with locality restrictions (TPM_KEY12 key complex).
TCPA_CERTIFY_INFO: Is returned if the TSS is connected to a TPM v1.1 or
the key which is used on a TPM v1.2 is a legacy one (PCR’s without locality
-> TPM_KEY key complex).


Regards.

Mudassar Aslam