diff mbox series

[4/9] crypto: atmel-aes: Add XTS input length constraint

Message ID 20210720085535.141486-5-tudor.ambarus@microchip.com (mailing list archive)
State New, archived
Headers show
Series crypto: atmel-{aes, tdes}: Fix corner cases - crypto self tests | expand

Commit Message

Tudor Ambarus July 20, 2021, 8:55 a.m. UTC 
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 mbox series

Patch

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;