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authorEric Biggers <ebiggers@google.com>2020-01-03 06:58:45 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2020-01-09 06:30:54 +0300
commitb9f76dddb1f9f70e008b982381bbc9a67c9b8c66 (patch)
tree329d8484b8eace9777db4e9965b02372c79e1a9f /crypto/chacha20poly1305.c
parent77f7e94d72208a1a84c88ed4de16a9bf368e9ded (diff)
downloadlinux-b9f76dddb1f9f70e008b982381bbc9a67c9b8c66.tar.xz
crypto: skcipher - pass instance to crypto_grab_skcipher()
Initializing a crypto_skcipher_spawn currently requires: 1. Set spawn->base.inst to point to the instance. 2. Call crypto_grab_skcipher(). But there's no reason for these steps to be separate, and in fact this unneeded complication has caused at least one bug, the one fixed by commit 6db43410179b ("crypto: adiantum - initialize crypto_spawn::inst") So just make crypto_grab_skcipher() take the instance as an argument. To keep the function calls from getting too unwieldy due to this extra argument, also introduce a 'mask' variable into the affected places which weren't already using one. Signed-off-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/chacha20poly1305.c')
-rw-r--r--crypto/chacha20poly1305.c13
1 files changed, 6 insertions, 7 deletions
diff --git a/crypto/chacha20poly1305.c b/crypto/chacha20poly1305.c
index 88cbdaba43b8..09d5a34ab339 100644
--- a/crypto/chacha20poly1305.c
+++ b/crypto/chacha20poly1305.c
@@ -558,6 +558,7 @@ static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb,
const char *name, unsigned int ivsize)
{
struct crypto_attr_type *algt;
+ u32 mask;
struct aead_instance *inst;
struct skcipher_alg *chacha;
struct crypto_alg *poly;
@@ -576,6 +577,8 @@ static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb,
if ((algt->type ^ CRYPTO_ALG_TYPE_AEAD) & algt->mask)
return -EINVAL;
+ mask = crypto_requires_sync(algt->type, algt->mask);
+
chacha_name = crypto_attr_alg_name(tb[1]);
if (IS_ERR(chacha_name))
return PTR_ERR(chacha_name);
@@ -585,9 +588,7 @@ static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb,
poly = crypto_find_alg(poly_name, &crypto_ahash_type,
CRYPTO_ALG_TYPE_HASH,
- CRYPTO_ALG_TYPE_AHASH_MASK |
- crypto_requires_sync(algt->type,
- algt->mask));
+ CRYPTO_ALG_TYPE_AHASH_MASK | mask);
if (IS_ERR(poly))
return PTR_ERR(poly);
poly_hash = __crypto_hash_alg_common(poly);
@@ -608,10 +609,8 @@ static int chachapoly_create(struct crypto_template *tmpl, struct rtattr **tb,
if (err)
goto err_free_inst;
- crypto_set_skcipher_spawn(&ctx->chacha, aead_crypto_instance(inst));
- err = crypto_grab_skcipher(&ctx->chacha, chacha_name, 0,
- crypto_requires_sync(algt->type,
- algt->mask));
+ err = crypto_grab_skcipher(&ctx->chacha, aead_crypto_instance(inst),
+ chacha_name, 0, mask);
if (err)
goto err_drop_poly;