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Open Source and information security mailing list archives
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Date: Wed, 3 Apr 2024 09:21:18 +0200 From: David Gstir <david@...ma-star.at> To: Mimi Zohar <zohar@...ux.ibm.com>, James Bottomley <jejb@...ux.ibm.com>, Jarkko Sakkinen <jarkko@...nel.org>, Herbert Xu <herbert@...dor.apana.org.au>, "David S. Miller" <davem@...emloft.net> Cc: David Gstir <david@...ma-star.at>, Shawn Guo <shawnguo@...nel.org>, Jonathan Corbet <corbet@....net>, Sascha Hauer <s.hauer@...gutronix.de>, Pengutronix Kernel Team <kernel@...gutronix.de>, Fabio Estevam <festevam@...il.com>, NXP Linux Team <linux-imx@....com>, Ahmad Fatoum <a.fatoum@...gutronix.de>, sigma star Kernel Team <upstream+dcp@...ma-star.at>, David Howells <dhowells@...hat.com>, Li Yang <leoyang.li@....com>, Paul Moore <paul@...l-moore.com>, James Morris <jmorris@...ei.org>, "Serge E. Hallyn" <serge@...lyn.com>, "Paul E. McKenney" <paulmck@...nel.org>, Randy Dunlap <rdunlap@...radead.org>, Catalin Marinas <catalin.marinas@....com>, "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>, Tejun Heo <tj@...nel.org>, "Steven Rostedt (Google)" <rostedt@...dmis.org>, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, linux-integrity@...r.kernel.org, keyrings@...r.kernel.org, linux-crypto@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linuxppc-dev@...ts.ozlabs.org, linux-security-module@...r.kernel.org Subject: [PATCH v8 2/6] KEYS: trusted: improve scalability of trust source config 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@...ma-star.at> Tested-by: Jarkko Sakkinen <jarkko@...nel.org> # for TRUSTED_KEYS_TPM Reviewed-by: Jarkko Sakkinen <jarkko@...nel.org> --- 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 -- 2.35.3
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