(no subject)

[Jarkko Sakkinen]

Hi,

I have a working PoC for boot-time initialization of vtpm inside
tpm_vtpm_proxy. ATM, it uses the Linux firmware interface to load a ELF
binary for the vtpm, and delivers a communication end for the helper
process.

It is a great feature with the current narrow scope for continuous
integration. Obviously the scope could be later on extended to e.g.
from unencrypted plain text to a vTPM living inside SGX enclave.

I could send an RFC of this, if there is wider interest for the
topic.

BR, Jarkko

boot-time vtpm helper (was "Re: <void>")

[Jarkko Sakkinen]

On Thu Aug 3, 2023 at 11:25 AM EEST, Jarkko Sakkinen wrote:
> Hi,
>
> I have a working PoC for boot-time initialization of vtpm inside
> tpm_vtpm_proxy. ATM, it uses the Linux firmware interface to load a ELF
> binary for the vtpm, and delivers a communication end for the helper
> process.
>
> It is a great feature with the current narrow scope for continuous
> integration. Obviously the scope could be later on extended to e.g.
> from unencrypted plain text to a vTPM living inside SGX enclave.
>
> I could send an RFC of this, if there is wider interest for the
> topic.
>
> BR, Jarkko

I'm sorry, I'm trying learn aerc, and unfortunately forgot to add a subject.

BR, Jarkko

Re: boot-time vtpm helper (was "Re: <void>")

[Stefan Berger]

On 8/3/23 05:06, Jarkko Sakkinen wrote:
> On Thu Aug 3, 2023 at 11:25 AM EEST, Jarkko Sakkinen wrote:
>> Hi,
>>
>> I have a working PoC for boot-time initialization of vtpm inside
>> tpm_vtpm_proxy. ATM, it uses the Linux firmware interface to load a ELF
>> binary for the vtpm, and delivers a communication end for the helper
>> process.
>>
>> It is a great feature with the current narrow scope for continuous
>> integration. Obviously the scope could be later on extended to e.g.

Since VMs with vTPMs exist, which CI/CD environment would one use this in?

Where does the binary for the vtpm live when it's loaded with the firmware interface?

>> from unencrypted plain text to a vTPM living inside SGX enclave.

I would run swtpm inside an SGX enclave using Gramine.

Regards,
    Stefan

>>
>> I could send an RFC of this, if there is wider interest for the
>> topic.
>>
>> BR, Jarkko
> 
> I'm sorry, I'm trying learn aerc, and unfortunately forgot to add a subject.
> 
> BR, Jarkko

Re: boot-time vtpm helper (was "Re: <void>")

[Jarkko Sakkinen]

On Thu Aug 3, 2023 at 3:46 PM EEST, Stefan Berger wrote:
>
>
> On 8/3/23 05:06, Jarkko Sakkinen wrote:
> > On Thu Aug 3, 2023 at 11:25 AM EEST, Jarkko Sakkinen wrote:
> >> Hi,
> >>
> >> I have a working PoC for boot-time initialization of vtpm inside
> >> tpm_vtpm_proxy. ATM, it uses the Linux firmware interface to load a ELF
> >> binary for the vtpm, and delivers a communication end for the helper
> >> process.
> >>
> >> It is a great feature with the current narrow scope for continuous
> >> integration. Obviously the scope could be later on extended to e.g.
>
> Since VMs with vTPMs exist, which CI/CD environment would one use this in?
>
> Where does the binary for the vtpm live when it's loaded with the firmware interface?

Obviously vtpm is identified by a filename. The rest of the details are
in the Linux firmware documentation.

> >> from unencrypted plain text to a vTPM living inside SGX enclave.
>
> I would run swtpm inside an SGX enclave using Gramine.

Having a zero configuration and also zero dependency mechanism for
trivial kernel testing is an objective benefit.

> Where does the binary for the vtpm live when it's loaded with the firmware interface?

Either in initrd or with the help of CONFIG_EXTRA_FIRMWARE_* in vmlinux.

> >> from unencrypted plain text to a vTPM living inside SGX enclave.
>
> I would run swtpm inside an SGX enclave using Gramine.

Why would do you want to enforce the use of swtpm?

BR, Jarkko