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crypto: qce - Return error for non-blocksize data(ECB/CBC algorithms)

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ECB/CBC encryption/decryption requires the data to be blocksize aligned.
Crypto engine hangs on non-block sized operations for these algorithms.
Return invalid data if data size is not blocksize aligned for these
algorithms.

Signed-off-by: Thara Gopinath <thara.gopinath@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Thara Gopinath 2021-02-11 15:01:23 -05:00 committed by Herbert Xu
parent f087894622
commit 44b45cdea4
1 changed files with 9 additions and 0 deletions
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9
drivers/crypto/qce/skcipher.c
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@ -254,6 +254,7 @@ static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt)
struct qce_cipher_ctx *ctx = crypto_skcipher_ctx(tfm);
struct qce_cipher_reqctx *rctx = skcipher_request_ctx(req);
struct qce_alg_template *tmpl = to_cipher_tmpl(tfm);
unsigned int blocksize = crypto_skcipher_blocksize(tfm);
int keylen;
int ret;
@ -265,6 +266,14 @@ static int qce_skcipher_crypt(struct skcipher_request *req, int encrypt)
if (!req->cryptlen)
return 0;
/*
* ECB and CBC algorithms require message lengths to be
* multiples of block size.
*/
if (IS_ECB(rctx->flags) || IS_CBC(rctx->flags))
if (!IS_ALIGNED(req->cryptlen, blocksize))
return -EINVAL;
/* qce is hanging when AES-XTS request len > QCE_SECTOR_SIZE and
* is not a multiple of it; pass such requests to the fallback
*/