[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] vTPM Deep Quote validation
On Mon, Mar 9, 2015 at 4:40 PM, Daniel De Graaf <dgdegra@xxxxxxxxxxxxx> wrote: On 03/08/2015 07:41 AM, Emil Condrea wrote: I thought of using TPM_PCRRead from virtual machine but it was not clear for me if it is safe. Is it possible for the selected vTPM PCRs values to be different when performing composite hash on vTPM from the values read with TPM_PCRRead after executing DeepQuote? The TPM has context management for each application? (eg: when one application extends something into a PCR and another application extends other thing in the same PCR(at the same time moment), are they hashed together?) When I read the standard I understood that the PCRs can never be overwritten, just reset and extended. Thanks.
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