I raised this as an issue with PIWG. In the meantime feel free to provide some historical context for why this hasn't been an issue in other implementations.
Thanks, Eugene -----Original Message----- From: edk2-devel [mailto:[email protected]] On Behalf Of Cohen, Eugene Sent: Friday, November 06, 2015 5:49 PM To: [email protected] Cc: Thompson, Mark L. (Boise IPG) <[email protected]> Subject: Re: [edk2] Authentication status for signed FVs extracted in PEI [Corrected the typos with a new version - proofreading is a good thing] I'm confused about something and hope I can get some help understanding this. If we have a signed FV that is extracted in PEI it doesn't look like the AuthenticationStatus gets propagated to DXE. The hob doesn't store authentication status and the core produces FVB with AuthenticationStatus forced to zero, even though the FV was signed and verified. This seems to mess up policy code in DXE because it is the AuthenticationStatus is not accurate. MdeModulePkg\Core\Dxe\FwVolBlock\FwVolBlock.c, FwVolBlockDriverInit: while ((FvHob.Raw = GetNextHob (EFI_HOB_TYPE_FV, FvHob.Raw)) != NULL) { // // Produce an FVB protocol for it // ProduceFVBProtocolOnBuffer (FvHob.FirmwareVolume->BaseAddress, FvHob.FirmwareVolume->Length, NULL, 0, NULL); FvHob.Raw = GET_NEXT_HOB (FvHob); } Note the hardcoded zero in the second-to-last argument. Is this expected? How would DXE policy code know if the FV was verified in PEI? It looks like the HOB definitions do not propagate PEI-phase Authentication status forward. Thanks, Eugene -----Original Message----- From: edk2-devel [mailto:[email protected]] On Behalf Of Cohen, Eugene Sent: Friday, November 06, 2015 11:12 AM To: [email protected] Cc: Thompson, Mark L. (Boise IPG) <[email protected]> Subject: [edk2] Authentication status for signed FVs extracted in PEI I'm confused about something and hope I can help some help understanding this. If we have a signed FV that is extracted in PEI it doesn't look like the AuthenticationStatus gets propagated to DXE. The hob doesn't store authentication status and the core products FVB with AuthenticationStatus forced to zero, even though the FV was signed and verified. This seems to mess up policy code we want to have in DXE because it is not accurate. MdeModulePkg\Core\Dxe\FwVolBlock\FwVolBlock.c, FwVolBlockDriverInit: while ((FvHob.Raw = GetNextHob (EFI_HOB_TYPE_FV, FvHob.Raw)) != NULL) { // // Produce an FVB protocol for it // ProduceFVBProtocolOnBuffer (FvHob.FirmwareVolume->BaseAddress, FvHob.FirmwareVolume->Length, NULL, 0, NULL); FvHob.Raw = GET_NEXT_HOB (FvHob); } Is this expected? How would DXE policy code know if the FV was verified in PEI? Thanks, Eugene _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel _______________________________________________ edk2-devel mailing list [email protected] https://lists.01.org/mailman/listinfo/edk2-devel
