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From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: "Jarkko Sakkinen" <jarkko@kernel.org>,
	"Horia Geantă" <horia.geanta@nxp.com>,
	"Mimi Zohar" <zohar@linux.ibm.com>,
	"Aymen Sghaier" <aymen.sghaier@nxp.com>,
	"Herbert Xu" <herbert@gondor.apana.org.au>,
	"David S. Miller" <davem@davemloft.net>,
	"James Bottomley" <jejb@linux.ibm.com>
Cc: Jan Luebbe <j.luebbe@pengutronix.de>,
	Udit Agarwal <udit.agarwal@nxp.com>,
	Sumit Garg <sumit.garg@linaro.org>,
	David Gstir <david@sigma-star.at>,
	Eric Biggers <ebiggers@kernel.org>,
	Franck LENORMAND <franck.lenormand@nxp.com>,
	Richard Weinberger <richard@nod.at>,
	James Morris <jmorris@namei.org>,
	linux-kernel@vger.kernel.org, David Howells <dhowells@redhat.com>,
	linux-security-module@vger.kernel.org, keyrings@vger.kernel.org,
	linux-crypto@vger.kernel.org, kernel@pengutronix.de,
	linux-integrity@vger.kernel.org,
	Steffen Trumtrar <s.trumtrar@pengutronix.de>,
	"Serge E. Hallyn" <serge@hallyn.com>
Subject: Re: [PATCH 0/4] KEYS: trusted: Introduce support for NXP CAAM-based trusted keys
Date: Fri, 6 Aug 2021 17:12:19 +0200	[thread overview]
Message-ID: <b9e44f8e-84a0-90be-6cfc-d3a0bde12178@pengutronix.de> (raw)
In-Reply-To: <cover.9fc9298fd9d63553491871d043a18affc2dbc8a8.1626885907.git-series.a.fatoum@pengutronix.de>

Dear trusted key maintainers,

On 21.07.21 18:48, Ahmad Fatoum wrote:
> Series applies on top of
> https://lore.kernel.org/linux-integrity/20210721160258.7024-1-a.fatoum@pengutronix.de/T/#u
> 
> v2 -> v3:
>  - Split off first Kconfig preparation patch. It fixes a regression,
>    so sent that out, so it can be applied separately (Sumit)
>  - Split off second key import patch. I'll send that out separately
>    as it's a development aid and not required within the CAAM series
>  - add MAINTAINERS entry

Gentle ping. I'd appreciate feedback on this series.

Cheers,
Ahmad

> 
> v1 -> v2:
>  - Added new commit to make trusted key Kconfig option independent
>    of TPM and added new Kconfig file for trusted keys
>  - Add new commit for importing existing key material
>  - Allow users to force use of kernel RNG (Jarkko)
>  - Enforce maximum keymod size (Horia)
>  - Use append_seq_(in|out)_ptr_intlen instead of append_seq_(in|out)_ptr
>    (Horia)
>  - Make blobifier handle private to CAAM glue code file (Horia)
>  - Extend trusted keys documentation for CAAM
>  - Rebased and updated original cover letter:
> 
> The Cryptographic Acceleration and Assurance Module (CAAM) is an IP core
> built into many newer i.MX and QorIQ SoCs by NXP.
> 
> Its blob mechanism can AES encrypt/decrypt user data using a unique
> never-disclosed device-specific key.
> 
> There has been multiple discussions on how to represent this within the kernel:
> 
> The Cryptographic Acceleration and Assurance Module (CAAM) is an IP core
> built into many newer i.MX and QorIQ SoCs by NXP.
> 
> Its blob mechanism can AES encrypt/decrypt user data using a unique
> never-disclosed device-specific key. There has been multiple
> discussions on how to represent this within the kernel:
> 
>  - [RFC] crypto: caam - add red blobifier
>    Steffen implemented[1] a PoC sysfs driver to start a discussion on how to
>    best integrate the blob mechanism.
>    Mimi suggested that it could be used to implement trusted keys.
>    Trusted keys back then were a TPM-only feature.
> 
>  - security/keys/secure_key: Adds the secure key support based on CAAM.
>    Udit added[2] a new "secure" key type with the CAAM as backend. The key
>    material stays within the kernel only.
>    Mimi and James agreed that this needs a generic interface, not specific
>    to CAAM. Mimi suggested trusted keys. Jan noted that this could serve as
>    basis for TEE-backed keys.
> 
>  - [RFC] drivers: crypto: caam: key: Add caam_tk key type
>    Franck added[3] a new "caam_tk" key type based on Udit's work. This time
>    it uses CAAM "black blobs" instead of "red blobs", so key material stays
>    within the CAAM and isn't exposed to kernel in plaintext.
>    James voiced the opinion that there should be just one user-facing generic
>    wrap/unwrap key type with multiple possible handlers.
>    David suggested trusted keys.
> 
>  - Introduce TEE based Trusted Keys support
>    Sumit reworked[4] trusted keys to support multiple possible backends with
>    one chosen at boot time and added a new TEE backend along with TPM.
>    This now sits in Jarkko's master branch to be sent out for v5.13
> 
> This patch series builds on top of Sumit's rework to have the CAAM as yet another
> trusted key backend.
> 
> The CAAM bits are based on Steffen's initial patch from 2015. His work had been
> used in the field for some years now, so I preferred not to deviate too much from it.
> 
> This series has been tested with dmcrypt[5] on an i.MX6DL.
> 
> Looking forward to your feedback.
> 
> Cheers,
> Ahmad
> 
>  [1]: https://lore.kernel.org/linux-crypto/1447082306-19946-2-git-send-email-s.trumtrar@pengutronix.de/
>  [2]: https://lore.kernel.org/linux-integrity/20180723111432.26830-1-udit.agarwal@nxp.com/
>  [3]: https://lore.kernel.org/lkml/1551456599-10603-2-git-send-email-franck.lenormand@nxp.com/
>  [4]: https://lore.kernel.org/lkml/1604419306-26105-1-git-send-email-sumit.garg@linaro.org/
>  [5]: https://lore.kernel.org/linux-integrity/20210122084321.24012-2-a.fatoum@pengutronix.de/
> 
> ---
> To: Jarkko Sakkinen <jarkko@kernel.org>
> To: "Horia Geantă" <horia.geanta@nxp.com>
> To: Mimi Zohar <zohar@linux.ibm.com>
> To: Aymen Sghaier <aymen.sghaier@nxp.com>
> To: Herbert Xu <herbert@gondor.apana.org.au>
> To: "David S. Miller" <davem@davemloft.net>
> To: James Bottomley <jejb@linux.ibm.com>
> Cc: David Howells <dhowells@redhat.com>
> Cc: James Morris <jmorris@namei.org>
> Cc: "Serge E. Hallyn" <serge@hallyn.com>
> Cc: Steffen Trumtrar <s.trumtrar@pengutronix.de>
> Cc: Udit Agarwal <udit.agarwal@nxp.com>
> Cc: Jan Luebbe <j.luebbe@pengutronix.de>
> Cc: David Gstir <david@sigma-star.at>
> Cc: Eric Biggers <ebiggers@kernel.org>
> Cc: Richard Weinberger <richard@nod.at>
> Cc: Franck LENORMAND <franck.lenormand@nxp.com>
> Cc: Sumit Garg <sumit.garg@linaro.org>
> Cc: linux-integrity@vger.kernel.org
> Cc: keyrings@vger.kernel.org
> Cc: linux-crypto@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> Cc: linux-security-module@vger.kernel.org
> 
> Ahmad Fatoum (4):
>   KEYS: trusted: allow users to use kernel RNG for key material
>   KEYS: trusted: allow trust sources to use kernel RNG for key material
>   crypto: caam - add in-kernel interface for blob generator
>   KEYS: trusted: Introduce support for NXP CAAM-based trusted keys
> 
>  Documentation/admin-guide/kernel-parameters.txt   |   8 +-
>  Documentation/security/keys/trusted-encrypted.rst |  60 +++-
>  MAINTAINERS                                       |   9 +-
>  drivers/crypto/caam/Kconfig                       |   3 +-
>  drivers/crypto/caam/Makefile                      |   1 +-
>  drivers/crypto/caam/blob_gen.c                    | 230 +++++++++++++++-
>  include/keys/trusted-type.h                       |   2 +-
>  include/keys/trusted_caam.h                       |  11 +-
>  include/soc/fsl/caam-blob.h                       |  56 ++++-
>  security/keys/trusted-keys/Kconfig                |  11 +-
>  security/keys/trusted-keys/Makefile               |   2 +-
>  security/keys/trusted-keys/trusted_caam.c         |  74 +++++-
>  security/keys/trusted-keys/trusted_core.c         |  23 +-
>  13 files changed, 477 insertions(+), 13 deletions(-)
>  create mode 100644 drivers/crypto/caam/blob_gen.c
>  create mode 100644 include/keys/trusted_caam.h
>  create mode 100644 include/soc/fsl/caam-blob.h
>  create mode 100644 security/keys/trusted-keys/trusted_caam.c
> 
> base-commit: 97408d81ed533b953326c580ff2c3f1948b3fcee
> 


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  parent reply	other threads:[~2021-08-06 15:12 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-21 16:48 Ahmad Fatoum
2021-07-21 16:48 ` [PATCH 1/4] KEYS: trusted: allow users to use kernel RNG for key material Ahmad Fatoum
2021-07-22  6:17   ` Sumit Garg
2021-07-21 16:48 ` [PATCH 2/4] KEYS: trusted: allow trust sources " Ahmad Fatoum
2021-07-22  6:31   ` Sumit Garg
2021-08-09  7:52     ` Ahmad Fatoum
2021-08-09  9:56       ` Jarkko Sakkinen
2021-08-10  5:24         ` Sumit Garg
2021-07-21 16:48 ` [PATCH 3/4] crypto: caam - add in-kernel interface for blob generator Ahmad Fatoum
2021-08-10 11:29   ` David Gstir
2021-08-11 10:22     ` Ahmad Fatoum
2021-08-11 10:43       ` David Gstir
2021-07-21 16:48 ` [PATCH 4/4] KEYS: trusted: Introduce support for NXP CAAM-based trusted keys Ahmad Fatoum
2021-08-06 15:12 ` Ahmad Fatoum [this message]
2021-08-09  9:35   ` [PATCH 0/4] " Jarkko Sakkinen
2021-08-09 10:16     ` Ahmad Fatoum
2021-08-10 11:28       ` David Gstir
2021-08-20 16:25         ` Ahmad Fatoum
2021-08-20 15:39 ` Tim Harvey
2021-08-20 16:19   ` Ahmad Fatoum
2021-08-20 20:20     ` Tim Harvey
2021-08-20 20:36       ` Ahmad Fatoum
2021-08-20 21:19         ` Tim Harvey
2021-08-23 13:29           ` Ahmad Fatoum
2021-08-23 17:50             ` Tim Harvey
2021-08-24  7:33               ` Ahmad Fatoum
2021-08-24 15:23                 ` Tim Harvey
2021-08-25  9:34                   ` Ahmad Fatoum

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