diff options
| author | Eric Biggers <ebiggers@google.com> | 2020-07-09 23:20:38 -0700 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-07-16 21:49:08 +1000 |
| commit | 7bcb2c99f8ed032cfb3f5596b4dccac6b1f501df (patch) | |
| tree | 7d8e914c0368036db8f1d99a923387833546330a /crypto/pcrypt.c | |
| parent | 4688111e78ed432b19c3cd6de545c83c47dc28b3 (diff) | |
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/pcrypt.c')
| -rw-r--r-- | crypto/pcrypt.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/crypto/pcrypt.c b/crypto/pcrypt.c index 8bddc65cd509..cbc383a1a3fe 100644 --- a/crypto/pcrypt.c +++ b/crypto/pcrypt.c @@ -226,18 +226,14 @@ static int pcrypt_init_instance(struct crypto_instance *inst, } static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb, - u32 type, u32 mask) + struct crypto_attr_type *algt) { struct pcrypt_instance_ctx *ctx; - struct crypto_attr_type *algt; struct aead_instance *inst; struct aead_alg *alg; + u32 mask = crypto_algt_inherited_mask(algt); int err; - algt = crypto_get_attr_type(tb); - if (IS_ERR(algt)) - return PTR_ERR(algt); - inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL); if (!inst) return -ENOMEM; @@ -254,7 +250,7 @@ static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb, goto err_free_inst; err = crypto_grab_aead(&ctx->spawn, aead_crypto_instance(inst), - crypto_attr_alg_name(tb[1]), 0, 0); + crypto_attr_alg_name(tb[1]), 0, mask); if (err) goto err_free_inst; @@ -263,7 +259,7 @@ static int pcrypt_create_aead(struct crypto_template *tmpl, struct rtattr **tb, if (err) goto err_free_inst; - inst->alg.base.cra_flags = CRYPTO_ALG_ASYNC; + inst->alg.base.cra_flags |= CRYPTO_ALG_ASYNC; inst->alg.ivsize = crypto_aead_alg_ivsize(alg); inst->alg.maxauthsize = crypto_aead_alg_maxauthsize(alg); @@ -298,7 +294,7 @@ static int pcrypt_create(struct crypto_template *tmpl, struct rtattr **tb) switch (algt->type & algt->mask & CRYPTO_ALG_TYPE_MASK) { case CRYPTO_ALG_TYPE_AEAD: - return pcrypt_create_aead(tmpl, tb, algt->type, algt->mask); + return pcrypt_create_aead(tmpl, tb, algt); } return -EINVAL; |