diff options
author | Eric Biggers <ebiggers@google.com> | 2020-01-03 06:59:00 +0300 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-01-09 06:30:56 +0300 |
commit | aacd5b4cfb87306888eb9e3612cb90afbb2ecba5 (patch) | |
tree | 1929494b9df06b228d8ab8d9dc8cda32100961e0 /crypto | |
parent | c282586fc341f9af741928f74a90163d26a1b347 (diff) |
crypto: skcipher - use crypto_grab_cipher() and simplify error paths
Make skcipher_alloc_instance_simple() 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.
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/skcipher.c | 39 |
1 files changed, 15 insertions, 24 deletions
diff --git a/crypto/skcipher.c b/crypto/skcipher.c index 15c033c960f7..950ff1438131 100644 --- a/crypto/skcipher.c +++ b/crypto/skcipher.c @@ -908,7 +908,7 @@ static void skcipher_exit_tfm_simple(struct crypto_skcipher *tfm) static void skcipher_free_instance_simple(struct skcipher_instance *inst) { - crypto_drop_spawn(skcipher_instance_ctx(inst)); + crypto_drop_cipher(skcipher_instance_ctx(inst)); kfree(inst); } @@ -932,10 +932,10 @@ struct skcipher_instance *skcipher_alloc_instance_simple( struct crypto_template *tmpl, struct rtattr **tb) { struct crypto_attr_type *algt; - struct crypto_alg *cipher_alg; - struct skcipher_instance *inst; - struct crypto_spawn *spawn; u32 mask; + struct skcipher_instance *inst; + struct crypto_cipher_spawn *spawn; + struct crypto_alg *cipher_alg; int err; algt = crypto_get_attr_type(tb); @@ -945,32 +945,25 @@ struct skcipher_instance *skcipher_alloc_instance_simple( if ((algt->type ^ CRYPTO_ALG_TYPE_SKCIPHER) & algt->mask) return ERR_PTR(-EINVAL); - mask = CRYPTO_ALG_TYPE_MASK | - crypto_requires_off(algt->type, algt->mask, - CRYPTO_ALG_NEED_FALLBACK); - - cipher_alg = crypto_get_attr_alg(tb, CRYPTO_ALG_TYPE_CIPHER, mask); - if (IS_ERR(cipher_alg)) - return ERR_CAST(cipher_alg); + mask = crypto_requires_off(algt->type, algt->mask, + CRYPTO_ALG_NEED_FALLBACK); inst = kzalloc(sizeof(*inst) + sizeof(*spawn), GFP_KERNEL); - if (!inst) { - err = -ENOMEM; - goto err_put_cipher_alg; - } + if (!inst) + return ERR_PTR(-ENOMEM); spawn = skcipher_instance_ctx(inst); - err = crypto_inst_setname(skcipher_crypto_instance(inst), tmpl->name, - cipher_alg); + err = crypto_grab_cipher(spawn, skcipher_crypto_instance(inst), + crypto_attr_alg_name(tb[1]), 0, mask); if (err) goto err_free_inst; + cipher_alg = crypto_spawn_cipher_alg(spawn); - spawn->dropref = true; - err = crypto_init_spawn(spawn, cipher_alg, - skcipher_crypto_instance(inst), - CRYPTO_ALG_TYPE_MASK); + err = crypto_inst_setname(skcipher_crypto_instance(inst), tmpl->name, + cipher_alg); if (err) goto err_free_inst; + inst->free = skcipher_free_instance_simple; /* Default algorithm properties, can be overridden */ @@ -990,9 +983,7 @@ struct skcipher_instance *skcipher_alloc_instance_simple( return inst; err_free_inst: - kfree(inst); -err_put_cipher_alg: - crypto_mod_put(cipher_alg); + skcipher_free_instance_simple(inst); return ERR_PTR(err); } EXPORT_SYMBOL_GPL(skcipher_alloc_instance_simple); |