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authorEric Biggers <ebiggers@google.com>2020-01-03 06:59:03 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2020-01-09 06:30:56 +0300
commit3b4e73d8ca810f63af05f367c576f0b33920657b (patch)
tree24e3914211f88b489f1c91b514dca529dc58a505 /crypto
parent1d0459cd83f5426d668ec3304a35f9dbeee6296b (diff)
downloadlinux-3b4e73d8ca810f63af05f367c576f0b33920657b.tar.xz
crypto: vmac - use crypto_grab_cipher() and simplify error paths
Make the vmac64 template use the new function crypto_grab_cipher() to initialize its cipher spawn. This is needed to make all spawns be initialized in a consistent way. This required making vmac_create() allocate the instance directly rather than use shash_alloc_instance(). 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 'crypto')
-rw-r--r--crypto/vmac.c33
1 files changed, 15 insertions, 18 deletions
diff --git a/crypto/vmac.c b/crypto/vmac.c
index 0bbb34dc87c4..9b000aaa20a8 100644
--- a/crypto/vmac.c
+++ b/crypto/vmac.c
@@ -618,6 +618,7 @@ static void vmac_exit_tfm(struct crypto_tfm *tfm)
static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb)
{
struct shash_instance *inst;
+ struct crypto_cipher_spawn *spawn;
struct crypto_alg *alg;
int err;
@@ -625,25 +626,24 @@ static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb)
if (err)
return err;
- alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER,
- CRYPTO_ALG_TYPE_MASK);
- if (IS_ERR(alg))
- return PTR_ERR(alg);
+ inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL);
+ if (!inst)
+ return -ENOMEM;
+ spawn = shash_instance_ctx(inst);
+
+ err = crypto_grab_cipher(spawn, shash_crypto_instance(inst),
+ crypto_attr_alg_name(tb[1]), 0, 0);
+ if (err)
+ goto err_free_inst;
+ alg = crypto_spawn_cipher_alg(spawn);
err = -EINVAL;
if (alg->cra_blocksize != VMAC_NONCEBYTES)
- goto out_put_alg;
+ goto err_free_inst;
- inst = shash_alloc_instance(tmpl->name, alg);
- err = PTR_ERR(inst);
- if (IS_ERR(inst))
- goto out_put_alg;
-
- err = crypto_init_spawn(shash_instance_ctx(inst), alg,
- shash_crypto_instance(inst),
- CRYPTO_ALG_TYPE_MASK);
+ err = crypto_inst_setname(shash_crypto_instance(inst), tmpl->name, alg);
if (err)
- goto out_free_inst;
+ goto err_free_inst;
inst->alg.base.cra_priority = alg->cra_priority;
inst->alg.base.cra_blocksize = alg->cra_blocksize;
@@ -662,12 +662,9 @@ static int vmac_create(struct crypto_template *tmpl, struct rtattr **tb)
err = shash_register_instance(tmpl, inst);
if (err) {
-out_free_inst:
+err_free_inst:
shash_free_instance(shash_crypto_instance(inst));
}
-
-out_put_alg:
- crypto_mod_put(alg);
return err;
}