From: Eric Biggers <ebiggers@xxxxxxxxxx>
Make the authenc template use the new function crypto_grab_ahash() to
initialize its ahash spawn.
This is needed to make all spawns be initialized in a consistent way.
Also simplify the error handling by taking advantage of crypto_drop_*()
now accepting (as a no-op) spawns that haven't been initialized yet, and
by taking advantage of crypto_grab_*() now handling ERR_PTR() names.
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
crypto/authenc.c | 51 ++++++++++++------------------------------------
1 file changed, 13 insertions(+), 38 deletions(-)
diff --git a/crypto/authenc.c b/crypto/authenc.c
index aef04792702a..f3f49fc022f2 100644
--- a/crypto/authenc.c
+++ b/crypto/authenc.c
@@ -385,11 +385,10 @@ static int crypto_authenc_create(struct crypto_template *tmpl,
struct crypto_attr_type *algt;
u32 mask;
struct aead_instance *inst;
+ struct authenc_instance_ctx *ctx;
struct hash_alg_common *auth;
struct crypto_alg *auth_base;
struct skcipher_alg *enc;
- struct authenc_instance_ctx *ctx;
- const char *enc_name;
int err;
algt = crypto_get_attr_type(tb);
@@ -401,35 +400,22 @@ static int crypto_authenc_create(struct crypto_template *tmpl,
mask = crypto_requires_sync(algt->type, algt->mask);
- auth = ahash_attr_alg(tb[1], CRYPTO_ALG_TYPE_HASH,
- CRYPTO_ALG_TYPE_AHASH_MASK | mask);
- if (IS_ERR(auth))
- return PTR_ERR(auth);
-
- auth_base = &auth->base;
-
- enc_name = crypto_attr_alg_name(tb[2]);
- err = PTR_ERR(enc_name);
- if (IS_ERR(enc_name))
- goto out_put_auth;
-
inst = kzalloc(sizeof(*inst) + sizeof(*ctx), GFP_KERNEL);
- err = -ENOMEM;
if (!inst)
- goto out_put_auth;
-
+ return -ENOMEM;
ctx = aead_instance_ctx(inst);
- err = crypto_init_ahash_spawn(&ctx->auth, auth,
- aead_crypto_instance(inst));
+ err = crypto_grab_ahash(&ctx->auth, aead_crypto_instance(inst),
+ crypto_attr_alg_name(tb[1]), 0, mask);
if (err)
- goto err_free_inst;
+ goto out;
+ auth = crypto_spawn_ahash_alg(&ctx->auth);
+ auth_base = &auth->base;
err = crypto_grab_skcipher(&ctx->enc, aead_crypto_instance(inst),
- enc_name, 0, mask);
+ crypto_attr_alg_name(tb[2]), 0, mask);
if (err)
- goto err_drop_auth;
-
+ goto out;
enc = crypto_spawn_skcipher_alg(&ctx->enc);
ctx->reqoff = ALIGN(2 * auth->digestsize + auth_base->cra_alignmask,
@@ -440,12 +426,12 @@ static int crypto_authenc_create(struct crypto_template *tmpl,
"authenc(%s,%s)", auth_base->cra_name,
enc->base.cra_name) >=
CRYPTO_MAX_ALG_NAME)
- goto err_drop_enc;
+ goto out;
if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
"authenc(%s,%s)", auth_base->cra_driver_name,
enc->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
- goto err_drop_enc;
+ goto out;
inst->alg.base.cra_flags = (auth_base->cra_flags |
enc->base.cra_flags) & CRYPTO_ALG_ASYNC;
@@ -470,21 +456,10 @@ static int crypto_authenc_create(struct crypto_template *tmpl,
inst->free = crypto_authenc_free;
err = aead_register_instance(tmpl, inst);
- if (err)
- goto err_drop_enc;
-
out:
- crypto_mod_put(auth_base);
+ if (err)
+ crypto_authenc_free(inst);
return err;
-
-err_drop_enc:
- crypto_drop_skcipher(&ctx->enc);
-err_drop_auth:
- crypto_drop_ahash(&ctx->auth);
-err_free_inst:
- kfree(inst);
-out_put_auth:
- goto out;
}
static struct crypto_template crypto_authenc_tmpl = {
--
2.24.1
