linux-kernel - RE: [RFC PATCH 2/4] fpga: Add new properties to support user-key encrypted bitstream loading

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <MWHPR02MB262309A8DC5BD857CBB01446C2519@MWHPR02MB2623.namprd02.prod.outlook.com>
Date:   Thu, 13 May 2021 10:54:58 +0000
From:   Nava kishore Manne <navam@...inx.com>
To:     Rob Herring <robh@...nel.org>
CC:     "mdf@...nel.org" <mdf@...nel.org>,
        "trix@...hat.com" <trix@...hat.com>,
        Michal Simek <michals@...inx.com>,
        "arnd@...db.de" <arnd@...db.de>, Rajan Vaja <RAJANV@...inx.com>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        Amit Sunil Dhamne <amitsuni@...x.xilinx.com>,
        Tejas Patel <tejasp@...x.xilinx.com>,
        "zou_wei@...wei.com" <zou_wei@...wei.com>,
        Manish Narani <MNARANI@...inx.com>,
        Sai Krishna Potthuri <lakshmis@...inx.com>,
        Jiaying Liang <jliang@...inx.com>,
        "linux-fpga@...r.kernel.org" <linux-fpga@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>, git <git@...inx.com>,
        "chinnikishore369@...il.com" <chinnikishore369@...il.com>
Subject: RE: [RFC PATCH 2/4] fpga: Add new properties to support user-key
 encrypted bitstream loading

Hi Rob,

	Please find my response inline.

> -----Original Message-----
> From: Rob Herring <robh@...nel.org>
> Sent: Thursday, May 13, 2021 8:01 AM
> To: Nava kishore Manne <navam@...inx.com>
> Cc: mdf@...nel.org; trix@...hat.com; Michal Simek <michals@...inx.com>;
> arnd@...db.de; Rajan Vaja <RAJANV@...inx.com>;
> gregkh@...uxfoundation.org; linus.walleij@...aro.org; Amit Sunil Dhamne
> <amitsuni@...x.xilinx.com>; Tejas Patel <tejasp@...x.xilinx.com>;
> zou_wei@...wei.com; Manish Narani <MNARANI@...inx.com>; Sai Krishna
> Potthuri <lakshmis@...inx.com>; Jiaying Liang <jliang@...inx.com>; linux-
> fpga@...r.kernel.org; devicetree@...r.kernel.org; linux-
> kernel@...r.kernel.org; linux-arm-kernel@...ts.infradead.org; git
> <git@...inx.com>; chinnikishore369@...il.com
> Subject: Re: [RFC PATCH 2/4] fpga: Add new properties to support user-key
> encrypted bitstream loading
> 
> On Tue, May 04, 2021 at 03:52:25PM +0530, Nava kishore Manne wrote:
> > This patch Adds ‘encrypted-key-name’ and
> > ‘encrypted-user-key-fpga-config’ properties to support user-key
> > encrypted bitstream loading use case.
> >
> > Signed-off-by: Nava kishore Manne <nava.manne@...inx.com>
> > ---
> >  Documentation/devicetree/bindings/fpga/fpga-region.txt | 5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/fpga/fpga-region.txt
> > b/Documentation/devicetree/bindings/fpga/fpga-region.txt
> > index d787d57491a1..957dc6cbcd9e 100644
> > --- a/Documentation/devicetree/bindings/fpga/fpga-region.txt
> > +++ b/Documentation/devicetree/bindings/fpga/fpga-region.txt
> > @@ -177,6 +177,9 @@ Optional properties:
> >  	it indicates that the FPGA has already been programmed with this
> image.
> >  	If this property is in an overlay targeting a FPGA region, it is a
> >  	request to program the FPGA with that image.
> > +- encrypted-key-name : should contain the name of an encrypted key file
> located
> > +	on the firmware search path. It will be used to decrypt the FPGA
> image
> > +	file.
> >  - fpga-bridges : should contain a list of phandles to FPGA Bridges that must
> be
> >  	controlled during FPGA programming along with the parent FPGA
> bridge.
> >  	This property is optional if the FPGA Manager handles the bridges.
> > @@ -187,6 +190,8 @@ Optional properties:
> >  - external-fpga-config : boolean, set if the FPGA has already been
> configured
> >  	prior to OS boot up.
> >  - encrypted-fpga-config : boolean, set if the bitstream is encrypted
> > +- encrypted-user-key-fpga-config : boolean, set if the bitstream is
> encrypted
> > +	with user key.
> 
> What's the relationship with encrypted-fpga-config? Both present or
> mutually exclusive? Couldn't this be implied by encrypted-key-name being
> present?
> 

In Encryption we have two kinds of use case one is Encrypted Bitstream loading with Device-key and
Other one is Encrypted Bitstream loading with User-key. encrypted-fpga-config and encrypted-user-key-fpga-config 
are mutually exclusive. To differentiate both the use cases I have added this new flag and Aes Key file(encrypted-key-name)
is needed only for encrypted-user-key-fpga-config use cases.

Regards,
Navakishore.