Bug 1728030

Summary:	RFE: Add encryption of TPM emulator state
Product:	[Community] Virtualization Tools	Reporter:	Marc-Andre Lureau <marcandre.lureau>
Component:	libvirt	Assignee:	Libvirt Maintainers <libvirt-maint>
Status:	CLOSED UPSTREAM	QA Contact:
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Priority:	unspecified
Version:	unspecified	CC:	libvirt-maint, tburke
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Last Closed:	2019-10-17 14:42:15 UTC	Type:	Bug
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Description Marc-Andre Lureau 2019-07-08 20:16:18 UTC

TPM emulator state contains sensitive data that can be encrypted thanks to swtpm support.

A proposal from Stefan Berger ([libvirt] Encrypted vTPM state) is to use an XML similar to luks and the virSecret object framework:

    <tpm model='tpm-tis'>
       <backend type='emulator' version='2.0'>
         <encryption format='vtpm'>
             <secret type='passphrase' uuid='32ee7e76-2178-47a1-ab7b-269e6e348015'/>
         </encryption>
       </backend>
     </tpm>

Comment 1 Marc-Andre Lureau 2019-10-17 14:42:15 UTC

Fixed in v5.6.0 (2019-08-05) 

Support encrypted soft TPM
    A soft TPM backend could be encrypted with passphrase. Now libvirt supports using a secret object to hold the passphrase, and referring to it via the encryption element of the TPM device.