linux-kernel - RE: [RFC PATCH 4/5] crypto: Adds user space interface for ALG_SET_KEY

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: <BN7PR02MB5124B0CB55A5B86D35752240AF020@BN7PR02MB5124.namprd02.prod.outlook.com>
Date:   Fri, 24 May 2019 06:50:25 +0000
From:   Kalyani Akula <kalyania@...inx.com>
To:     Stephan Mueller <smueller@...onox.de>,
        "herbert@...dor.apana.org.au" <herbert@...dor.apana.org.au>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     Sarat Chand Savitala <saratcha@...inx.com>
Subject: RE: [RFC PATCH 4/5] crypto: Adds user space interface for
 ALG_SET_KEY_TYPE

Ping!!

> -----Original Message-----
> From: Kalyani Akula
> Sent: Wednesday, May 8, 2019 3:01 PM
> To: Stephan Mueller <smueller@...onox.de>
> Cc: herbert@...dor.apana.org.au; davem@...emloft.net; linux-
> crypto@...r.kernel.org; linux-kernel@...r.kernel.org; Sarat Chand Savitala
> <saratcha@...inx.com>
> Subject: RE: [RFC PATCH 4/5] crypto: Adds user space interface for
> ALG_SET_KEY_TYPE
> 
> Hi Stephan,
> 
> Keyrings is in-kernel key-management and retention facility. User can use it to
> manage keys used for applications.
> 
> Xilinx cryptographic hardware has a mechanism to store keys in its internal
> hardware and do not have mechanism to read it back due to security reasons.
> It stores key internally in different forms like simple key, key encrypted with
> unique hardware DNA, key encrypted with hardware family key, key stored in
> eFUSEs/BBRAM etc.
> Based on security level expected, user can select one of the key for AES
> operation. Since AES hardware internally has access to these keys, user do not
> require to provide key to hardware, but need to tell which internal hardware key
> user application like to use for AES operation.
> 
> Basic need is to pass information to AES hardware about which internal
> hardware key to be used for AES operation.
> 
> I agree that from general use case perspective we are not selecting key type but
> selecting internal hardware keys provided by user.
> How about providing option to select custom hardware keys provided by
> hardware (AES_SEL_HW_KEY)?
> 
> Thanks
> kalyani
> 
> > -----Original Message-----
> > From: Stephan Mueller <smueller@...onox.de>
> > Sent: Thursday, April 25, 2019 12:01 AM
> > To: Kalyani Akula <kalyania@...inx.com>
> > Cc: herbert@...dor.apana.org.au; davem@...emloft.net; linux-
> > crypto@...r.kernel.org; linux-kernel@...r.kernel.org
> > Subject: Re: [RFC PATCH 4/5] crypto: Adds user space interface for
> > ALG_SET_KEY_TYPE
> >
> > Am Montag, 22. April 2019, 11:17:55 CEST schrieb Kalyani Akula:
> >
> > Hi Kalyani,
> >
> > > > Besides, seem to be more a key handling issue. Wouldn't it make
> > > > sense to rather have such issue solved with key rings than in the
> > > > kernel crypto API?
> > >
> > > [kalyani] Can you please elaborate on this further ?
> >
> > The kernel has a keyring support in security/keys which has a user
> > space interface with keyutils. That interface is commonly used for any
> > sort of key manipulation.
> >
> > Ciao
> > Stephan
> >