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crypto: rockchip - add fallback for ahash

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Adds a fallback for all case hardware cannot handle.

Fixes: ce0183cb64 ("crypto: rockchip - switch to skcipher API")
Reviewed-by: John Keeping <john@metanate.com>
Signed-off-by: Corentin Labbe <clabbe@baylibre.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Corentin Labbe 2022-09-27 07:54:45 +00:00 committed by Herbert Xu
parent 68ef8af09a
commit 816600485c
1 changed files with 38 additions and 0 deletions
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38
drivers/crypto/rockchip/rk3288_crypto_ahash.c
View file

@ -16,6 +16,40 @@
* so we put the fixed hash out when met zero message.
*/
static bool rk_ahash_need_fallback(struct ahash_request *req)
{
struct scatterlist *sg;
sg = req->src;
while (sg) {
if (!IS_ALIGNED(sg->offset, sizeof(u32))) {
return true;
}
if (sg->length % 4) {
return true;
}
sg = sg_next(sg);
}
return false;
}
static int rk_ahash_digest_fb(struct ahash_request *areq)
{
struct rk_ahash_rctx *rctx = ahash_request_ctx(areq);
struct crypto_ahash *tfm = crypto_ahash_reqtfm(areq);
struct rk_ahash_ctx *tfmctx = crypto_ahash_ctx(tfm);
ahash_request_set_tfm(&rctx->fallback_req, tfmctx->fallback_tfm);
rctx->fallback_req.base.flags = areq->base.flags &
CRYPTO_TFM_REQ_MAY_SLEEP;
rctx->fallback_req.nbytes = areq->nbytes;
rctx->fallback_req.src = areq->src;
rctx->fallback_req.result = areq->result;
return crypto_ahash_digest(&rctx->fallback_req);
}
static int zero_message_process(struct ahash_request *req)
{
struct crypto_ahash *tfm = crypto_ahash_reqtfm(req);
@ -167,6 +201,9 @@ static int rk_ahash_digest(struct ahash_request *req)
struct rk_ahash_ctx *tctx = crypto_tfm_ctx(req->base.tfm);
struct rk_crypto_info *dev = tctx->dev;
if (rk_ahash_need_fallback(req))
return rk_ahash_digest_fb(req);
if (!req->nbytes)
return zero_message_process(req);
else
@ -309,6 +346,7 @@ static void rk_cra_hash_exit(struct crypto_tfm *tfm)
struct rk_ahash_ctx *tctx = crypto_tfm_ctx(tfm);
free_page((unsigned long)tctx->dev->addr_vir);
crypto_free_ahash(tctx->fallback_tfm);
}
struct rk_crypto_tmp rk_ahash_sha1 = {