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. Adds UFS vops for generate, import and prepare keys so that vendors can hooks to them. Signed-off-by: Gaurav Kashyap <quic_gaurkash@xxxxxxxxxxx> --- drivers/scsi/ufs/ufshcd-crypto.c | 50 ++++++++++++++++++++++++++++++-- drivers/scsi/ufs/ufshcd.h | 11 +++++++ 2 files changed, 58 insertions(+), 3 deletions(-) diff --git a/drivers/scsi/ufs/ufshcd-crypto.c b/drivers/scsi/ufs/ufshcd-crypto.c index 9d68621a0eb4..2bea9b924f77 100644 --- a/drivers/scsi/ufs/ufshcd-crypto.c +++ b/drivers/scsi/ufs/ufshcd-crypto.c @@ -136,9 +136,9 @@ bool ufshcd_crypto_enable(struct ufs_hba *hba) } static int ufshcd_crypto_derive_sw_secret(struct blk_crypto_profile *profile, - const u8 *wrapped_key, - unsigned int wrapped_key_size, - u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]) + const u8 *wrapped_key, + unsigned int wrapped_key_size, + u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]) { struct ufs_hba *hba = container_of(profile, struct ufs_hba, crypto_profile); @@ -146,6 +146,47 @@ static int ufshcd_crypto_derive_sw_secret(struct blk_crypto_profile *profile, if (hba->vops && hba->vops->derive_secret) return hba->vops->derive_secret(hba, wrapped_key, wrapped_key_size, sw_secret); + return 0; +} + +static int ufshcd_crypto_generate_key(struct blk_crypto_profile *profile, + u8 longterm_wrapped_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(longterm_wrapped_key); + + return -EOPNOTSUPP; +} + +static int ufshcd_crypto_prepare_key(struct blk_crypto_profile *profile, + const u8 *longterm_wrapped_key, + size_t longterm_wrapped_key_size, + u8 ephemerally_wrapped_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(longterm_wrapped_key, + longterm_wrapped_key_size, ephemerally_wrapped_key); + + return -EOPNOTSUPP; +} + +static int ufshcd_crypto_import_key(struct blk_crypto_profile *profile, + const u8 *imported_key, + size_t imported_key_size, + u8 longterm_wrapped_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(imported_key, + imported_key_size, longterm_wrapped_key); return -EOPNOTSUPP; } @@ -154,6 +195,9 @@ 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/drivers/scsi/ufs/ufshcd.h b/drivers/scsi/ufs/ufshcd.h index 095c2d660aa7..88cd21dec0d9 100644 --- a/drivers/scsi/ufs/ufshcd.h +++ b/drivers/scsi/ufs/ufshcd.h @@ -321,6 +321,10 @@ struct ufs_pwr_mode_info { * @program_key: program or evict an inline encryption key * @event_notify: called to notify important events * @derive_secret: derive sw secret from wrapped inline encryption key + * @generate_key: generate a longterm wrapped key for inline encryption + * @prepare_key: prepare the longterm wrapped key for inline encryption + * by rewrapping with a ephemeral wrapping key. + * @import_key: import a raw key and return a longterm wrapped key. */ struct ufs_hba_variant_ops { const char *name; @@ -362,6 +366,13 @@ struct ufs_hba_variant_ops { int (*derive_secret)(struct ufs_hba *hba, const u8 *wrapped_key, unsigned int wrapped_key_size, u8 sw_secret[BLK_CRYPTO_SW_SECRET_SIZE]); + int (*generate_key)(u8 longterm_wrapped_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); + int (*prepare_key)(const u8 *longterm_wrapped_key, + unsigned int longterm_wrapped_key_size, + u8 ephemerally_wrapped_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); + int (*import_key)(const u8 *imported_key, + unsigned int imported_key_size, + u8 longterm_wrapped_key[BLK_CRYPTO_MAX_HW_WRAPPED_KEY_SIZE]); }; /* clock gating state */ -- 2.17.1
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