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Tue, 6 Sep 2022 05:50:14 +0000 From: Pankaj Gupta To: jarkko@kernel.org, a.fatoum@pengutronix.de, Jason@zx2c4.com, jejb@linux.ibm.com, zohar@linux.ibm.com, dhowells@redhat.com, sumit.garg@linaro.org, david@sigma-star.at, michael@walle.cc, john.ernberg@actia.se, jmorris@namei.org, serge@hallyn.com, herbert@gondor.apana.org.au, davem@davemloft.net, j.luebbe@pengutronix.de, ebiggers@kernel.org, richard@nod.at, keyrings@vger.kernel.org, linux-crypto@vger.kernel.org, linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org, sahil.malhotra@nxp.com, kshitiz.varshney@nxp.com, horia.geanta@nxp.com, pankaj.gupta@nxp.com, V.Sethi@nxp.com Subject: [RFC PATCH HBK: 0/8] HW BOUND KEY as TRUSTED KEY Date: Tue, 6 Sep 2022 12:21:49 +0530 Message-Id: <20220906065157.10662-1-pankaj.gupta@nxp.com> X-Mailer: git-send-email 2.17.1 X-ClientProxiedBy: SI2PR01CA0001.apcprd01.prod.exchangelabs.com (2603:1096:4:191::13) To DU2PR04MB8630.eurprd04.prod.outlook.com (2603:10a6:10:2dd::15) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 565cf064-7ba7-447f-7971-08da8fcbab3d X-MS-TrafficTypeDiagnostic: AM0PR04MB6657:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Thus, it is un-usable, even if somehow fetched from kernel memory. It ensures run-time security. This patchset adds generic support for classing the Hardware Bound Key, based on: - Newly added flag-'is_hbk', added to the tfm. Consumer of the kernel crypto api, after allocating the transformation, sets this flag based on the basis of the type of key consumer has. - This helps to influence the core processing logic for the encapsulated algorithm. - This flag is set by the consumer after allocating the tfm and before calling the function crypto_xxx_setkey(). First implementation is based on CAAM. NXP built CAAM IP is the Cryptographic Acceleration and Assurance Module. This is contain by the i.MX and QorIQ SoCs by NXP. CAAM is a suitable backend (source) for kernel trusted keys. This backend source can be used for run-time security as well by generating the hardware bound key. Along with plain key, the CAAM generates black key. A black key is an encrypted key, which can only be decrypted inside CAAM. Hence, CAAM's black key can only be used by CAAM. Thus it is declared as a hardware bound key. Pankaj Gupta (8): keys-trusted: new cmd line option added hw-bound-key: flag-is_hbk added to the tfm sk_cipher: checking for hw bound operation keys-trusted: re-factored caam based trusted key caam blob-gen: moving blob_priv to caam_drv_private KEYS: trusted: caam based black key caam alg: symmetric key ciphers are updated dm-crypt: consumer-app setting the flag-is_hbk crypto/skcipher.c | 3 +- drivers/crypto/caam/blob_gen.c | 242 ++++++++++++++++++++-- drivers/crypto/caam/caamalg.c | 37 +++- drivers/crypto/caam/caamalg_desc.c | 8 +- drivers/crypto/caam/desc.h | 8 +- drivers/crypto/caam/desc_constr.h | 6 +- drivers/crypto/caam/intern.h | 6 +- drivers/md/dm-crypt.c | 6 +- include/keys/trusted-type.h | 2 + include/linux/crypto.h | 2 + include/soc/fsl/caam-blob.h | 44 ++-- security/keys/trusted-keys/trusted_caam.c | 6 + security/keys/trusted-keys/trusted_core.c | 14 ++ 13 files changed, 333 insertions(+), 51 deletions(-)