Hi Jonas,

On 08-09-2011 03:53, Jonas wrote:
> Hello to you all,
> my question is about the function Tspi_PcrExtend();
> I'm tryin' to extend a hash value to a pcr, but I get an UNKNOWN ERROR. I was
> searching in the web for a code doing this, but with no success. So now I'm
> asking you and I hope you can help me.
> Here is my code without catching errors and the hash origin (the hash with the
> size of 20 Bytes is correct):
>
>
>       TSS_HCONTEXT hContext_PCR;
>       TSS_RESULT result;
>       unsigned char* hash;
>       UINT32 hashlen;       //=20

hashlen uninitialized, and...

>       UINT32 PCRindex = 10;
>       TSS_HTPM hTPM = 0;
>
>       UINT32 PCRsize;
>       BYTE   *PCRvalue;
>
>         result = Tspi_Context_Create(&hContext_PCR);
>         result = Tspi_Context_Connect(hContext_PCR,NULL);
>       result = Tspi_Context_GetTpmObject(hContext_PCR, &hTPM);
>
>         result = Tspi_TPM_PcrExtend(hTPM, PCRindex, hashlen, hash, NULL,
.. wasn't assigned so far, and should be 20 given current PCRs hold sha1 hashes.

Thanks,
Rajiv Andrade
Security Development
IBM Linux Technology Center


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