From: Tudor Ambarus Date: Tue, 20 Jul 2021 08:55:30 +0000 (+0300) Subject: crypto: atmel-aes - Add XTS input length constraint X-Git-Tag: xarray-5.18~1238^2~70 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=26d769ae90907e6f4724b800ba16f11681079f23;p=users%2Fwilly%2Fxarray.git crypto: atmel-aes - Add XTS input length constraint Input length smaller than block size does not make sense for XTS. Signed-off-by: Tudor Ambarus Signed-off-by: Herbert Xu --- 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;