From: "Jarkko Sakkinen" <jarkko@kernel.org>
To: "David Gstir" <david@sigma-star.at>,
"Mimi Zohar" <zohar@linux.ibm.com>,
"James Bottomley" <jejb@linux.ibm.com>,
"Herbert Xu" <herbert@gondor.apana.org.au>,
"David S. Miller" <davem@davemloft.net>
Cc: linux-doc@vger.kernel.org,
Catalin Marinas <catalin.marinas@arm.com>,
David Howells <dhowells@redhat.com>,
keyrings@vger.kernel.org, Fabio Estevam <festevam@gmail.com>,
Ahmad Fatoum <a.fatoum@pengutronix.de>,
Paul Moore <paul@paul-moore.com>,
Jonathan Corbet <corbet@lwn.net>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
James Morris <jmorris@namei.org>,
NXP Linux Team <linux-imx@nxp.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
"Paul E. McKenney" <paulmck@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
sigma star Kernel Team <upstream+dcp@sigma-star.at>,
"Steven Rostedt \(Google\)" <rostedt@goodmis.org>,
linux-arm-kernel@lists.infradead.org,
linuxppc-dev@lists.ozlabs.org,
Randy Dunlap <rdunlap@infradead.org>,
linux-kernel@vger.kernel.org, Li Yang <leoyang.li@nxp.com>,
linux-security-module@vger.kernel.org,
linux-crypto@vger.kernel.org,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Tejun Heo <tj@kernel.org>,
linux-integrity@vger.kernel.org, Shawn Guo <shawnguo@kernel.org>
Subject: Re: [PATCH v7 2/6] KEYS: trusted: improve scalability of trust source config
Date: Wed, 27 Mar 2024 17:30:28 +0200 [thread overview]
Message-ID: <D04N1YLIAJQT.1WM3WVEU7R60G@kernel.org> (raw)
In-Reply-To: <20240327082454.13729-3-david@sigma-star.at>
On Wed Mar 27, 2024 at 10:24 AM EET, David Gstir wrote:
> Enabling trusted keys requires at least one trust source implementation
> (currently TPM, TEE or CAAM) to be enabled. Currently, this is
> done by checking each trust source's config option individually.
> This does not scale when more trust sources like the one for DCP
> are added, because the condition will get long and hard to read.
>
> Add config HAVE_TRUSTED_KEYS which is set to true by each trust source
> once its enabled and adapt the check for having at least one active trust
> source to use this option. Whenever a new trust source is added, it now
> needs to select HAVE_TRUSTED_KEYS.
>
> Signed-off-by: David Gstir <david@sigma-star.at>
> ---
> security/keys/trusted-keys/Kconfig | 10 ++++++++--
> 1 file changed, 8 insertions(+), 2 deletions(-)
>
> diff --git a/security/keys/trusted-keys/Kconfig b/security/keys/trusted-keys/Kconfig
> index dbfdd8536468..553dc117f385 100644
> --- a/security/keys/trusted-keys/Kconfig
> +++ b/security/keys/trusted-keys/Kconfig
> @@ -1,3 +1,6 @@
> +config HAVE_TRUSTED_KEYS
> + bool
> +
> config TRUSTED_KEYS_TPM
> bool "TPM-based trusted keys"
> depends on TCG_TPM >= TRUSTED_KEYS
> @@ -9,6 +12,7 @@ config TRUSTED_KEYS_TPM
> select ASN1_ENCODER
> select OID_REGISTRY
> select ASN1
> + select HAVE_TRUSTED_KEYS
> help
> Enable use of the Trusted Platform Module (TPM) as trusted key
> backend. Trusted keys are random number symmetric keys,
> @@ -20,6 +24,7 @@ config TRUSTED_KEYS_TEE
> bool "TEE-based trusted keys"
> depends on TEE >= TRUSTED_KEYS
> default y
> + select HAVE_TRUSTED_KEYS
> help
> Enable use of the Trusted Execution Environment (TEE) as trusted
> key backend.
> @@ -29,10 +34,11 @@ config TRUSTED_KEYS_CAAM
> depends on CRYPTO_DEV_FSL_CAAM_JR >= TRUSTED_KEYS
> select CRYPTO_DEV_FSL_CAAM_BLOB_GEN
> default y
> + select HAVE_TRUSTED_KEYS
> help
> Enable use of NXP's Cryptographic Accelerator and Assurance Module
> (CAAM) as trusted key backend.
>
> -if !TRUSTED_KEYS_TPM && !TRUSTED_KEYS_TEE && !TRUSTED_KEYS_CAAM
> -comment "No trust source selected!"
> +if !HAVE_TRUSTED_KEYS
> + comment "No trust source selected!"
> endif
Tested-by: Jarkko Sakkinen <jarkko@kernel.org> # for TRUSTED_KEYS_TPM
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
BR, Jarkko
next prev parent reply other threads:[~2024-03-27 15:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-27 8:24 [PATCH v7 0/6] DCP as trusted keys backend David Gstir
2024-03-27 8:24 ` [PATCH v7 1/6] crypto: mxs-dcp: Add support for hardware-bound keys David Gstir
2024-03-27 8:24 ` [PATCH v7 2/6] KEYS: trusted: improve scalability of trust source config David Gstir
2024-03-27 15:30 ` Jarkko Sakkinen [this message]
2024-03-27 8:24 ` [PATCH v7 3/6] KEYS: trusted: Introduce NXP DCP-backed trusted keys David Gstir
2024-03-27 8:24 ` [PATCH v7 4/6] MAINTAINERS: add entry for DCP-based " David Gstir
2024-03-27 8:24 ` [PATCH v7 5/6] docs: document DCP-backed trusted keys kernel params David Gstir
2024-03-27 15:32 ` Jarkko Sakkinen
2024-03-27 8:24 ` [PATCH v7 6/6] docs: trusted-encrypted: add DCP as new trust source David Gstir
2024-03-27 15:40 ` Jarkko Sakkinen
2024-03-28 8:05 ` David Gstir
2024-03-28 18:47 ` Jarkko Sakkinen
2024-03-28 18:50 ` Jarkko Sakkinen
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