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From:   Longfang Liu <liulongfang@huawei.com>
To:     <herbert@gondor.apana.org.au>, <wangzhou1@hisilicon.com>
CC:     <linux-crypto@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <liulongfang@huawei.com>
Subject: [PATCH] crypto: hisilicon/sec - Fixes AES algorithm mode parameter problem
Date:   Sat, 27 Mar 2021 17:29:18 +0800
Message-ID: <1616837358-15112-2-git-send-email-liulongfang@huawei.com>
In-Reply-To: <1616837358-15112-1-git-send-email-liulongfang@huawei.com>
References: <1616837358-15112-1-git-send-email-liulongfang@huawei.com>
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The input data of the ECB (AES) algorithm needs to be aligned
with 16 bytes, and the input data of the XTS (AES) algorithm is
at least 16 bytes. Otherwise the SEC hardware will go wrong.

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
---
 drivers/crypto/hisilicon/sec2/sec_crypto.c | 37 ++++++++++++++++++++++++++----
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/drivers/crypto/hisilicon/sec2/sec_crypto.c b/drivers/crypto/hisilicon/sec2/sec_crypto.c
index c74082c..71c0125 100644
--- a/drivers/crypto/hisilicon/sec2/sec_crypto.c
+++ b/drivers/crypto/hisilicon/sec2/sec_crypto.c
@@ -1397,6 +1397,36 @@ static int sec_aead_sha512_ctx_init(struct crypto_aead *tfm)
 	return sec_aead_ctx_init(tfm, "sha512");
 }
 
+
+static int sec_skcipher_cryptlen_ckeck(struct sec_ctx *ctx,
+	struct sec_req *sreq)
+{
+	u32 cryptlen = sreq->c_req.sk_req->cryptlen;
+	struct device *dev = ctx->dev;
+	u8 c_mode = ctx->c_ctx.c_mode;
+	int ret = 0;
+
+	switch (c_mode) {
+	case SEC_CMODE_XTS:
+		if (unlikely(cryptlen < AES_BLOCK_SIZE)) {
+			dev_err(dev, "skcipher XTS mode input length error!\n");
+			ret = -EINVAL;
+		}
+		break;
+	case SEC_CMODE_ECB:
+	case SEC_CMODE_CBC:
+		if (unlikely(cryptlen & (AES_BLOCK_SIZE - 1))) {
+			dev_err(dev, "skcipher AES input length error!\n");
+			ret = -EINVAL;
+		}
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
 static int sec_skcipher_param_check(struct sec_ctx *ctx, struct sec_req *sreq)
 {
 	struct skcipher_request *sk_req = sreq->c_req.sk_req;
@@ -1421,12 +1451,9 @@ static int sec_skcipher_param_check(struct sec_ctx *ctx, struct sec_req *sreq)
 		}
 		return 0;
 	} else if (c_alg == SEC_CALG_AES || c_alg == SEC_CALG_SM4) {
-		if (unlikely(sk_req->cryptlen & (AES_BLOCK_SIZE - 1))) {
-			dev_err(dev, "skcipher aes input length error!\n");
-			return -EINVAL;
-		}
-		return 0;
+		return sec_skcipher_cryptlen_ckeck(ctx, sreq);
 	}
+
 	dev_err(dev, "skcipher algorithm error!\n");
 
 	return -EINVAL;
-- 
2.8.1