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From: Tudor Ambarus <tudor.ambarus@microchip.com>
To: <herbert@gondor.apana.org.au>
Cc: <nicolas.ferre@microchip.com>, <alexandre.belloni@bootlin.com>,
	<ludovic.desroches@microchip.com>, <linux-crypto@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	"Tudor Ambarus" <tudor.ambarus@microchip.com>
Subject: [PATCH 4/9] crypto: atmel-aes: Add XTS input length constraint
Date: Tue, 20 Jul 2021 11:55:30 +0300	[thread overview]
Message-ID: <20210720085535.141486-5-tudor.ambarus@microchip.com> (raw)
In-Reply-To: <20210720085535.141486-1-tudor.ambarus@microchip.com>

Input length smaller than block size does not make sense for XTS.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
---
 drivers/crypto/atmel-aes.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c
index 9c6d80d1d7a0..4e9515e8dd25 100644
--- a/drivers/crypto/atmel-aes.c
+++ b/drivers/crypto/atmel-aes.c
@@ -1091,6 +1091,9 @@ static int atmel_aes_crypt(struct skcipher_request *req, unsigned long mode)
 	struct atmel_aes_dev *dd;
 	u32 opmode = mode & AES_FLAGS_OPMODE_MASK;
 
+	if (opmode == AES_FLAGS_XTS && req->cryptlen < XTS_BLOCK_SIZE)
+		return -EINVAL;
+
 	if ((opmode == AES_FLAGS_ECB || opmode == AES_FLAGS_CBC) &&
 	    !IS_ALIGNED(req->cryptlen, crypto_skcipher_blocksize(skcipher)))
 		return -EINVAL;
-- 
2.25.1


  parent reply	other threads:[~2021-07-20  9:06 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-20  8:55 [PATCH 0/9] crypto: atmel-{aes, tdes}: Fix corner cases - crypto self tests Tudor Ambarus
2021-07-20  8:55 ` [PATCH 1/9] crypto: atmel-tdes: Clarify how tdes dev gets allocated to the tfm Tudor Ambarus
2021-07-20  8:55 ` [PATCH 2/9] crypto: atmel-tdes: Handle error messages Tudor Ambarus
2021-07-20  8:55 ` [PATCH 3/9] crypto: atmel-aes: Add blocksize constraint for ECB and CBC modes Tudor Ambarus
2021-07-20  8:55 ` Tudor Ambarus [this message]
2021-07-20  8:55 ` [PATCH 5/9] crypto: atmel-aes: Add NIST 800-38A's zero length cryptlen constraint Tudor Ambarus
2021-07-20  8:55 ` [PATCH 6/9] crypto: atmel-tdes: Add FIPS81's " Tudor Ambarus
2021-07-20  8:55 ` [PATCH 7/9] crypto: atmel-{aes, tdes}: Set OFB's blocksize to 1 Tudor Ambarus
2021-07-20  8:55 ` [PATCH 8/9] crypto: atmel-aes: Add fallback to XTS software implementation Tudor Ambarus
2021-07-20  8:55 ` [PATCH 9/9] crypto: atmel-aes: Allocate aes dev at tfm init time Tudor Ambarus
2021-07-30  3:10 ` [PATCH 0/9] crypto: atmel-{aes, tdes}: Fix corner cases - crypto self tests Herbert Xu

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