This patch contains two changes in UFS for wrapped keys. 1. Implements the blk_crypto_profile ops for generate, import and prepare key apis. 2. Defines UFS vops for generate, import and prepare keys so that vendors can hook into them.
Signed-off-by: Gaurav Kashyap <[email protected]> --- drivers/ufs/core/ufshcd-crypto.c | 41 ++++++++++++++++++++++++++++++++ include/ufs/ufshcd.h | 11 +++++++++ 2 files changed, 52 insertions(+) diff --git a/drivers/ufs/core/ufshcd-crypto.c b/drivers/ufs/core/ufshcd-crypto.c index 3edbca87c322..cf34f4a9cda8 100644 --- a/drivers/ufs/core/ufshcd-crypto.c +++ b/drivers/ufs/core/ufshcd-crypto.c @@ -143,10 +143,51 @@ static int ufshcd_crypto_derive_sw_secret(struct blk_crypto_profile *profile, return -EOPNOTSUPP; } +static int ufshcd_crypto_generate_key(struct blk_crypto_profile *profile, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_hba *hba = + container_of(profile, struct ufs_hba, crypto_profile); + + if (hba->vops && hba->vops->generate_key) + return hba->vops->generate_key(hba, lt_key); + + return -EOPNOTSUPP; +} + +static int ufshcd_crypto_prepare_key(struct blk_crypto_profile *profile, + const u8 *lt_key, size_t lt_key_size, + u8 eph_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_hba *hba = + container_of(profile, struct ufs_hba, crypto_profile); + + if (hba->vops && hba->vops->prepare_key) + return hba->vops->prepare_key(hba, lt_key, lt_key_size, eph_key); + + return -EOPNOTSUPP; +} + +static int ufshcd_crypto_import_key(struct blk_crypto_profile *profile, + const u8 *imp_key, size_t imp_key_size, + u8 lt_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]) +{ + struct ufs_hba *hba = + container_of(profile, struct ufs_hba, crypto_profile); + + if (hba->vops && hba->vops->import_key) + return hba->vops->import_key(hba, imp_key, imp_key_size, lt_key); + + return -EOPNOTSUPP; +} + static const struct blk_crypto_ll_ops ufshcd_crypto_ops = { .keyslot_program = ufshcd_crypto_keyslot_program, .keyslot_evict = ufshcd_crypto_keyslot_evict, .derive_sw_secret = ufshcd_crypto_derive_sw_secret, + .generate_key = ufshcd_crypto_generate_key, + .prepare_key = ufshcd_crypto_prepare_key, + .import_key = ufshcd_crypto_import_key, }; static enum blk_crypto_mode_num diff --git a/include/ufs/ufshcd.h b/include/ufs/ufshcd.h index 86677788b5bd..49657a5d1e34 100644 --- a/include/ufs/ufshcd.h +++ b/include/ufs/ufshcd.h @@ -321,6 +321,9 @@ 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 * @event_notify: called to notify important events * @reinit_notify: called to notify reinit of UFSHCD during max gear switch * @mcq_config_resource: called to configure MCQ platform resources @@ -368,6 +371,14 @@ 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]); void (*event_notify)(struct ufs_hba *hba, enum ufs_event_type evt, void *data); void (*reinit_notify)(struct ufs_hba *); -- 2.25.1
