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Mon, 02 Dec 2024 04:03:12 -0800 (PST) Received: from [127.0.1.1] ([193.57.185.11]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-434b0d9bed7sm152396095e9.8.2024.12.02.04.03.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Dec 2024 04:03:11 -0800 (PST) From: Bartosz Golaszewski Date: Mon, 02 Dec 2024 13:02:33 +0100 Subject: [PATCH RESEND v7 17/17] ufs: host: add support for generating, importing and preparing wrapped keys Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241202-wrapped-keys-v7-17-67c3ca3f3282@linaro.org> References: <20241202-wrapped-keys-v7-0-67c3ca3f3282@linaro.org> In-Reply-To: <20241202-wrapped-keys-v7-0-67c3ca3f3282@linaro.org> To: Jens Axboe , Jonathan Corbet , Alasdair Kergon , Mike Snitzer , Mikulas Patocka , Adrian Hunter , Asutosh Das , Ritesh Harjani , Ulf Hansson , Alim Akhtar , Avri Altman , Bart Van Assche , "James E.J. Bottomley" , Gaurav Kashyap , Neil Armstrong , Dmitry Baryshkov , "Martin K. Petersen" , Eric Biggers , "Theodore Y. Ts'o" , Jaegeuk Kim , Alexander Viro , Christian Brauner , Jan Kara , Bjorn Andersson , Konrad Dybcio , Manivannan Sadhasivam Cc: linux-block@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, dm-devel@lists.linux.dev, linux-mmc@vger.kernel.org, linux-scsi@vger.kernel.org, linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-arm-msm@vger.kernel.org, Bartosz Golaszewski , Om Prakash Singh X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=openpgp-sha256; l=4284; i=bartosz.golaszewski@linaro.org; h=from:subject:message-id; bh=3S2Zj/hLbrM4DjwdvlxVSy1kmPJ99K5Qvwb4G0BsQ0U=; b=owEBbQKS/ZANAwAKARGnLqAUcddyAcsmYgBnTaHXzRXDCRoQFXnAuSVzn467NjNF+9zLmE0aj 0uunEU1gB2JAjMEAAEKAB0WIQQWnetsC8PEYBPSx58Rpy6gFHHXcgUCZ02h1wAKCRARpy6gFHHX cuOpD/47sYsAvMcTPt3gWFt5Ys+R87FxssehI6pHubn+78bsn3A96WfHX3VZdjGFkUwzq7viptr RlKwm+AjcRkZCIAp+ugg5N9+8vPcTORKyP9xbzi7EASkZpDo+IU4OlmiCU4v2zTgcGAcyyrfoZZ 5Mqwy0vmUjKyZIpos5R7Vo7shS5vI07xLGO+HJdM1HDJKzWrKAvLgFlfxMI3mifhdVSnObs7sIz PZ0CGeMWoJohiueJpkAyQXRZfbSFlm74sgWDPkoi6v9jF9xQfmm0fDXDP3mtTwiZ9rmwRUDILhm 80/0JruiNWEcI6DgtbnR9LCRn9NVRiEcj/CFI6fUpD/g0u1FlzFrOIsV+3vyMqwTigQfduAHnaf sKpjFNq+0F+G6zwx+qfv6+m6l0/FqibL/QD368m/6UWEOuA5QdztggCXz/CeAUKS8LnrO1qFpRm 3NMlOEksrfrnKJDsL5h7Brl5U9AHsY2VotvmZOOv7oBITkFrqej9++l0E1DEoLLnSev9qv0SQ53 JG5CKq3vK049drq4KYMkWXs/rp3EA3Sa2NOQHBpKztdYLU7AvN67AK6kkGthMVGHTmiamfx7I5V SZKIg7FYbj/sALZWC0cI58VEgRQI/d2RllME12D+mExb4lYIMiN+FEzToGsTZKmVFXGfyQzL+jF 9XB34b80/dF528w== X-Developer-Key: i=bartosz.golaszewski@linaro.org; a=openpgp; fpr=169DEB6C0BC3C46013D2C79F11A72EA01471D772 From: Gaurav Kashyap Extend the UFS core ops to include callbacks for generating, importing and prepating HW wrapped keys using the lower-level block crypto operations and implement them for QCom UFS. Reviewed-by: Om Prakash Singh Tested-by: Neil Armstrong Signed-off-by: Gaurav Kashyap Reviewed-by: Konrad Dybcio Signed-off-by: Bartosz Golaszewski --- drivers/ufs/host/ufs-qcom.c | 34 ++++++++++++++++++++++++++++++++++ include/ufs/ufshcd.h | 11 +++++++++++ 2 files changed, 45 insertions(+) diff --git a/drivers/ufs/host/ufs-qcom.c b/drivers/ufs/host/ufs-qcom.c index 0da2674777d2c..58a310e2571b2 100644 --- a/drivers/ufs/host/ufs-qcom.c +++ b/drivers/ufs/host/ufs-qcom.c @@ -195,10 +195,41 @@ static int ufs_qcom_ice_derive_sw_secret(struct ufs_hba *hba, const u8 wkey[], return qcom_ice_derive_sw_secret(host->ice, wkey, wkey_size, sw_secret); } +static int ufs_qcom_ice_generate_key(struct ufs_hba *hba, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + + return qcom_ice_generate_key(host->ice, lt_key); +} + +static int ufs_qcom_ice_prepare_key(struct ufs_hba *hba, + const u8 *lt_key, size_t lt_key_size, + u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + + return qcom_ice_prepare_key(host->ice, lt_key, lt_key_size, + eph_key); +} + +static int ufs_qcom_ice_import_key(struct ufs_hba *hba, + const u8 *imp_key, size_t imp_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_qcom_host *host = ufshcd_get_variant(hba); + + return qcom_ice_import_key(host->ice, imp_key, imp_key_size, + lt_key); +} + #else #define ufs_qcom_ice_program_key NULL #define ufs_qcom_ice_derive_sw_secret NULL +#define ufs_qcom_ice_generate_key NULL +#define ufs_qcom_ice_prepare_key NULL +#define ufs_qcom_ice_import_key NULL static inline void ufs_qcom_ice_enable(struct ufs_qcom_host *host) { @@ -1848,6 +1879,9 @@ static const struct ufs_hba_variant_ops ufs_hba_qcom_vops = { .config_scaling_param = ufs_qcom_config_scaling_param, .program_key = ufs_qcom_ice_program_key, .derive_sw_secret = ufs_qcom_ice_derive_sw_secret, + .generate_key = ufs_qcom_ice_generate_key, + .prepare_key = ufs_qcom_ice_prepare_key, + .import_key = ufs_qcom_ice_import_key, .reinit_notify = ufs_qcom_reinit_notify, .mcq_config_resource = ufs_qcom_mcq_config_resource, .get_hba_mac = ufs_qcom_get_hba_mac, diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index dc8c055eae79a..df51c0a96c675 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -326,6 +326,9 @@ struct ufs_pwr_mode_info { * @config_scaling_param: called to configure clock scaling parameters * @program_key: program or evict an inline encryption key * @derive_sw_secret: derive sw secret from a wrapped key + * @generate_key: generate a storage key and return longterm wrapped key + * @prepare_key: unwrap longterm key and return ephemeral wrapped key + * @import_key: import sw storage key and return longterm wrapped key * @fill_crypto_prdt: initialize crypto-related fields in the PRDT * @event_notify: called to notify important events * @reinit_notify: called to notify reinit of UFSHCD during max gear switch @@ -379,6 +382,14 @@ struct ufs_hba_variant_ops { int (*derive_sw_secret)(struct ufs_hba *hba, const u8 wkey[], unsigned int wkey_size, u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]); + int (*generate_key)(struct ufs_hba *hba, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); + int (*prepare_key)(struct ufs_hba *hba, + const u8 *lt_key, size_t lt_key_size, + u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); + int (*import_key)(struct ufs_hba *hba, + const u8 *imp_key, size_t imp_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); int (*fill_crypto_prdt)(struct ufs_hba *hba, const struct bio_crypt_ctx *crypt_ctx, void *prdt, unsigned int num_segments);