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| author | Eric Biggers <ebiggers@google.com> | 2020-07-10 08:20:38 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-07-16 13:49:08 +0200 |
| commit | 7bcb2c99f8ed032cfb3f5596b4dccac6b1f501df (patch) | |
| tree | 7d8e914c0368036db8f1d99a923387833546330a /crypto/geniv.c | |
| parent | crypto: seqiv - remove seqiv_create() (diff) | |
| download | linux-7bcb2c99f8ed032cfb3f5596b4dccac6b1f501df.tar.xz linux-7bcb2c99f8ed032cfb3f5596b4dccac6b1f501df.zip | |
crypto: algapi - use common mechanism for inheriting flags
The flag CRYPTO_ALG_ASYNC is "inherited" in the sense that when a
template is instantiated, the template will have CRYPTO_ALG_ASYNC set if
any of the algorithms it uses has CRYPTO_ALG_ASYNC set.
We'd like to add a second flag (CRYPTO_ALG_ALLOCATES_MEMORY) that gets
"inherited" in the same way. This is difficult because the handling of
CRYPTO_ALG_ASYNC is hardcoded everywhere. Address this by:
- Add CRYPTO_ALG_INHERITED_FLAGS, which contains the set of flags that
have these inheritance semantics.
- Add crypto_algt_inherited_mask(), for use by template ->create()
methods. It returns any of these flags that the user asked to be
unset and thus must be passed in the 'mask' to crypto_grab_*().
- Also modify crypto_check_attr_type() to handle computing the 'mask'
so that most templates can just use this.
- Make crypto_grab_*() propagate these flags to the template instance
being created so that templates don't have to do this themselves.
Make crypto/simd.c propagate these flags too, since it "wraps" another
algorithm, similar to a template.
Based on a patch by Mikulas Patocka <mpatocka@redhat.com>
(https://lore.kernel.org/r/alpine.LRH.2.02.2006301414580.30526@file01.intranet.prod.int.rdu2.redhat.com).
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/geniv.c')
| -rw-r--r-- | crypto/geniv.c | 14 |
1 files changed, 3 insertions, 11 deletions
diff --git a/crypto/geniv.c b/crypto/geniv.c index 07496c8af0ab..bee4621b4f12 100644 --- a/crypto/geniv.c +++ b/crypto/geniv.c @@ -42,7 +42,6 @@ struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl, struct rtattr **tb) { struct crypto_aead_spawn *spawn; - struct crypto_attr_type *algt; struct aead_instance *inst; struct aead_alg *alg; unsigned int ivsize; @@ -50,12 +49,9 @@ struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl, u32 mask; int err; - algt = crypto_get_attr_type(tb); - if (IS_ERR(algt)) - return ERR_CAST(algt); - - if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask) - return ERR_PTR(-EINVAL); + err = crypto_check_attr_type(tb, CRYPTO_ALG_TYPE_AEAD, &mask); + if (err) + return ERR_PTR(err); inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); if (!inst) @@ -63,9 +59,6 @@ struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl, spawn = aead_instance_ctx(inst); - /* Ignore async algorithms if necessary. */ - mask = crypto_requires_sync(algt->type, algt->mask); - err = crypto_grab_aead(spawn, aead_crypto_instance(inst), crypto_attr_alg_name(tb[1]), 0, mask); if (err) @@ -90,7 +83,6 @@ struct aead_instance *aead_geniv_alloc(struct crypto_template *tmpl, CRYPTO_MAX_ALG_NAME) goto err_free_inst; - inst->alg.base.cra_flags = alg->base.cra_flags & CRYPTO_ALG_ASYNC; inst->alg.base.cra_priority = alg->base.cra_priority; inst->alg.base.cra_blocksize = alg->base.cra_blocksize; inst->alg.base.cra_alignmask = alg->base.cra_alignmask; |