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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 <tudor.ambarus@microchip.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tudor Ambarus 2021-07-20 11:55:30 +03:00 committed by Herbert Xu
parent 534b32a8be
commit 26d769ae90
1 changed files with 3 additions and 0 deletions
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3
drivers/crypto/atmel-aes.c
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@ -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;