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authorEric Biggers <ebiggers@google.com>2020-01-02 19:59:00 -0800
committerHerbert Xu <herbert@gondor.apana.org.au>2020-01-09 11:30:56 +0800
commitaacd5b4cfb87306888eb9e3612cb90afbb2ecba5 (patch)
tree1929494b9df06b228d8ab8d9dc8cda32100961e0 /crypto/skcipher.c
parentcrypto: chacha20poly1305 - use crypto_grab_ahash() and simplify error paths (diff)
downloadlinux-dev-aacd5b4cfb87306888eb9e3612cb90afbb2ecba5.tar.xz
linux-dev-aacd5b4cfb87306888eb9e3612cb90afbb2ecba5.zip
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 '')
-rw-r--r--crypto/skcipher.c39
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);