On 9/21/2020 10:32 AM, Andrei Botila (OSS) wrote:
> +static bool xts_skcipher_ivsize(struct skcipher_request *req)
> +{
> + struct crypto_skcipher *skcipher = crypto_skcipher_reqtfm(req);
> + unsigned int ivsize = crypto_skcipher_ivsize(skcipher);
> + u64 size = 0;
> +
> + size = get_unaligned((u64 *)(req->iv + (ivsize / 2)));
> +
> + return !!size;
Just get rid of the "size" local variable and return !!get_unaligned(...).
Also the function should be inline.
> @@ -3344,13 +3379,30 @@ static int caam_cra_init(struct crypto_skcipher *tfm)
> struct caam_skcipher_alg *caam_alg =
> container_of(alg, typeof(*caam_alg), skcipher);
> struct caam_ctx *ctx = crypto_skcipher_ctx(tfm);
> -
> - crypto_skcipher_set_reqsize(tfm, sizeof(struct caam_skcipher_req_ctx));
> + u32 alg_aai = caam_alg->caam.class1_alg_type & OP_ALG_AAI_MASK;
>
> ctx->enginectx.op.do_one_request = skcipher_do_one_req;
>
> - return caam_init_common(crypto_skcipher_ctx(tfm), &caam_alg->caam,
> - false);
> + if (alg_aai == OP_ALG_AAI_XTS) {
> + const char *tfm_name = crypto_tfm_alg_name(&tfm->base);
> + struct crypto_skcipher *fallback;
> +
> + fallback = crypto_alloc_skcipher(tfm_name, 0,
> + CRYPTO_ALG_NEED_FALLBACK);
> + if (IS_ERR(fallback)) {
> + dev_err(ctx->jrdev, "Failed to allocate %s fallback:
> %ld\n",
> + tfm_name, PTR_ERR(fallback));
> + return PTR_ERR(fallback);
> + }
> +
> + ctx->fallback = fallback;
> + crypto_skcipher_set_reqsize(tfm, sizeof(struct
> caam_skcipher_req_ctx) +
> + crypto_skcipher_reqsize(fallback));
> + } else {
> + crypto_skcipher_set_reqsize(tfm, sizeof(struct
> caam_skcipher_req_ctx));
> + }
> +
> + return caam_init_common(ctx, &caam_alg->caam, false);
In case caam_init_common() fails, fallback should be freed for XTS path.
Horia
