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authorEric Biggers <ebiggers@google.com>2020-01-02 19:58:56 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2020-01-09 11:30:55 +0800
commit370738824b8e2c0ea5d8b4e4b4142fb7bab1a403 (patch)
tree160cc3c81596b7b3f3edd8255229dec3a7c8ab84 /crypto/authencesn.c
parentcrypto: authenc - use crypto_grab_ahash() and simplify error paths (diff)
downloadlinux-dev-370738824b8e2c0ea5d8b4e4b4142fb7bab1a403.tar.xz
linux-dev-370738824b8e2c0ea5d8b4e4b4142fb7bab1a403.zip
crypto: authencesn - use crypto_grab_ahash() and simplify error paths
Make the authencesn 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@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to '')
-rw-r--r--crypto/authencesn.c52
1 files changed, 14 insertions, 38 deletions
diff --git a/crypto/authencesn.c b/crypto/authencesn.c
index 83bda7f905bb..589008146fce 100644
--- a/crypto/authencesn.c
+++ b/crypto/authencesn.c
@@ -393,11 +393,10 @@ static int crypto_authenc_esn_create(struct crypto_template *tmpl,
struct crypto_attr_type *algt;
u32 mask;
struct aead_instance *inst;
+ struct authenc_esn_instance_ctx *ctx;
struct hash_alg_common *auth;
struct crypto_alg *auth_base;
struct skcipher_alg *enc;
- struct authenc_esn_instance_ctx *ctx;
- const char *enc_name;
int err;
algt = crypto_get_attr_type(tb);
@@ -409,47 +408,34 @@ static int crypto_authenc_esn_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;
+ 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 err_free_inst;
enc = crypto_spawn_skcipher_alg(&ctx->enc);
err = -ENAMETOOLONG;
if (snprintf(inst->alg.base.cra_name, CRYPTO_MAX_ALG_NAME,
"authencesn(%s,%s)", auth_base->cra_name,
enc->base.cra_name) >= CRYPTO_MAX_ALG_NAME)
- goto err_drop_enc;
+ goto err_free_inst;
if (snprintf(inst->alg.base.cra_driver_name, CRYPTO_MAX_ALG_NAME,
"authencesn(%s,%s)", auth_base->cra_driver_name,
enc->base.cra_driver_name) >= CRYPTO_MAX_ALG_NAME)
- goto err_drop_enc;
+ goto err_free_inst;
inst->alg.base.cra_flags = (auth_base->cra_flags |
enc->base.cra_flags) & CRYPTO_ALG_ASYNC;
@@ -475,21 +461,11 @@ static int crypto_authenc_esn_create(struct crypto_template *tmpl,
inst->free = crypto_authenc_esn_free,
err = aead_register_instance(tmpl, inst);
- if (err)
- goto err_drop_enc;
-
-out:
- crypto_mod_put(auth_base);
- return err;
-
-err_drop_enc:
- crypto_drop_skcipher(&ctx->enc);
-err_drop_auth:
- crypto_drop_ahash(&ctx->auth);
+ if (err) {
err_free_inst:
- kfree(inst);
-out_put_auth:
- goto out;
+ crypto_authenc_esn_free(inst);
+ }
+ return err;
}
static struct crypto_template crypto_authenc_esn_tmpl = {