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| author | Eric Biggers <ebiggers@google.com> | 2020-01-02 19:59:03 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-01-09 11:30:56 +0800 |
| commit | 3b4e73d8ca810f63af05f367c576f0b33920657b (patch) | |
| tree | 24e3914211f88b489f1c91b514dca529dc58a505 /crypto | |
| parent | 1d0459cd83f5426d668ec3304a35f9dbeee6296b (diff) | |
| download | linux-stable-3b4e73d8ca810f63af05f367c576f0b33920657b.tar.gz linux-stable-3b4e73d8ca810f63af05f367c576f0b33920657b.tar.bz2 linux-stable-3b4e73d8ca810f63af05f367c576f0b33920657b.zip | |
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.c | 33 |
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; } |