This is a note to let you know that I've just added the patch titled crypto: rockchip - better handle cipher key to the 6.1-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: crypto-rockchip-better-handle-cipher-key.patch and it can be found in the queue-6.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 9d3d12becd7a8c17e54003c11cbf3f7e081c5325 Author: Corentin Labbe <clabbe@xxxxxxxxxxxx> Date: Tue Sep 27 07:54:46 2022 +0000 crypto: rockchip - better handle cipher key [ Upstream commit d6b23ccef82816050c2fd458c9dabfa0e0af09b9 ] The key should not be set in hardware too much in advance, this will fail it 2 TFM with different keys generate alternative requests. The key should be stored and used just before doing cipher operations. Fixes: ce0183cb6464b ("crypto: rockchip - switch to skcipher API") Reviewed-by: John Keeping <john@xxxxxxxxxxxx> Signed-off-by: Corentin Labbe <clabbe@xxxxxxxxxxxx> Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/crypto/rockchip/rk3288_crypto.h b/drivers/crypto/rockchip/rk3288_crypto.h index dfff0e2a83e4..665cc0bb2264 100644 --- a/drivers/crypto/rockchip/rk3288_crypto.h +++ b/drivers/crypto/rockchip/rk3288_crypto.h @@ -245,6 +245,7 @@ struct rk_ahash_rctx { struct rk_cipher_ctx { struct rk_crypto_info *dev; unsigned int keylen; + u8 key[AES_MAX_KEY_SIZE]; u8 iv[AES_BLOCK_SIZE]; struct crypto_skcipher *fallback_tfm; }; diff --git a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c index eac5bba66e25..1ef94f8db2c5 100644 --- a/drivers/crypto/rockchip/rk3288_crypto_skcipher.c +++ b/drivers/crypto/rockchip/rk3288_crypto_skcipher.c @@ -95,7 +95,7 @@ static int rk_aes_setkey(struct crypto_skcipher *cipher, keylen != AES_KEYSIZE_256) return -EINVAL; ctx->keylen = keylen; - memcpy_toio(ctx->dev->reg + RK_CRYPTO_AES_KEY_0, key, keylen); + memcpy(ctx->key, key, keylen); return crypto_skcipher_setkey(ctx->fallback_tfm, key, keylen); } @@ -111,7 +111,7 @@ static int rk_des_setkey(struct crypto_skcipher *cipher, return err; ctx->keylen = keylen; - memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, key, keylen); + memcpy(ctx->key, key, keylen); return crypto_skcipher_setkey(ctx->fallback_tfm, key, keylen); } @@ -127,7 +127,8 @@ static int rk_tdes_setkey(struct crypto_skcipher *cipher, return err; ctx->keylen = keylen; - memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, key, keylen); + memcpy(ctx->key, key, keylen); + return crypto_skcipher_setkey(ctx->fallback_tfm, key, keylen); } @@ -283,6 +284,7 @@ static void rk_ablk_hw_init(struct rk_crypto_info *dev) RK_CRYPTO_TDES_BYTESWAP_IV; CRYPTO_WRITE(dev, RK_CRYPTO_TDES_CTRL, rctx->mode); memcpy_toio(dev->reg + RK_CRYPTO_TDES_IV_0, req->iv, ivsize); + memcpy_toio(ctx->dev->reg + RK_CRYPTO_TDES_KEY1_0, ctx->key, ctx->keylen); conf_reg = RK_CRYPTO_DESSEL; } else { rctx->mode |= RK_CRYPTO_AES_FIFO_MODE | @@ -295,6 +297,7 @@ static void rk_ablk_hw_init(struct rk_crypto_info *dev) rctx->mode |= RK_CRYPTO_AES_256BIT_key; CRYPTO_WRITE(dev, RK_CRYPTO_AES_CTRL, rctx->mode); memcpy_toio(dev->reg + RK_CRYPTO_AES_IV_0, req->iv, ivsize); + memcpy_toio(ctx->dev->reg + RK_CRYPTO_AES_KEY_0, ctx->key, ctx->keylen); } conf_reg |= RK_CRYPTO_BYTESWAP_BTFIFO | RK_CRYPTO_BYTESWAP_BRFIFO; @@ -484,6 +487,7 @@ static void rk_ablk_exit_tfm(struct crypto_skcipher *tfm) { struct rk_cipher_ctx *ctx = crypto_skcipher_ctx(tfm); + memzero_explicit(ctx->key, ctx->keylen); free_page((unsigned long)ctx->dev->addr_vir); crypto_free_skcipher(ctx->fallback_tfm); }