Am Freitag, 4. Januar 2019, 05:16:14 CET schrieb Eric Biggers:
Hi Eric,
> From: Eric Biggers <ebiggers@xxxxxxxxxx>
>
> The majority of skcipher templates (including both the existing ones and
> the ones remaining to be converted from the "blkcipher" API) just wrap a
> single block cipher algorithm. This includes cbc, cfb, ctr, ecb, kw,
> ofb, and pcbc. Add a helper function skcipher_alloc_instance_simple()
> that handles allocating an skcipher instance for this common case.
>
> Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Apart from the comment below:
Reviewed-by: Stephan Mueller <smueller@xxxxxxxxxx>
> +struct skcipher_instance *
> +skcipher_alloc_instance_simple(struct crypto_template *tmpl, struct rtattr
> **tb, + struct crypto_alg **cipher_alg_ret)
> +{
> + struct crypto_attr_type *algt;
> + struct crypto_alg *cipher_alg;
> + struct skcipher_instance *inst;
> + struct crypto_spawn *spawn;
> + u32 mask;
> + int err;
> +
> + algt = crypto_get_attr_type(tb);
> + if (IS_ERR(algt))
> + return ERR_CAST(algt);
> +
> + if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask)
> + return ERR_PTR(-EINVAL);
Why not using crypto_check_attr_type? I understand that it does not return
algt for the next check, but maybe we can consolidate the code a bit here?
> +
> + mask = CRYPTO_ALG_TYPE_MASK |
> + crypto_requires_off(algt->type, algt->mask,
> + CRYPTO_ALG_NEED_FALLBACK);
Ciao
Stephan
