From 36b6fbefc06cbfe7b5f17c32445ecaf082c24449 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Tue, 3 Oct 2023 11:43:27 +0800
Subject: [PATCH] crypto: ctr - Only access common skcipher fields on spawn
As skcipher spawns may be of the type lskcipher, only the common
fields may be accessed. This was already the case but use the
correct helpers to make this more obvious.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
---
crypto/ctr.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/crypto/ctr.c b/crypto/ctr.c
index 23c698b220130..1420496062d57 100644
--- a/crypto/ctr.c
+++ b/crypto/ctr.c
@@ -258,8 +258,8 @@ static int crypto_rfc3686_create(struct crypto_template *tmpl,
struct rtattr **tb)
{
struct skcipher_instance *inst;
- struct skcipher_alg *alg;
struct crypto_skcipher_spawn *spawn;
+ struct skcipher_alg_common *alg;
u32 mask;
int err;
@@ -278,11 +278,11 @@ static int crypto_rfc3686_create(struct crypto_template *tmpl,
if (err)
goto err_free_inst;
- alg = crypto_spawn_skcipher_alg(spawn);
+ alg = crypto_spawn_skcipher_alg_common(spawn);
/* We only support 16-byte blocks. */
err = -EINVAL;
- if (crypto_skcipher_alg_ivsize(alg) != CTR_RFC3686_BLOCK_SIZE)
+ if (alg->ivsize != CTR_RFC3686_BLOCK_SIZE)
goto err_free_inst;
/* Not a stream cipher? */
@@ -303,11 +303,9 @@ static int crypto_rfc3686_create(struct crypto_template *tmpl,
inst->alg.base.cra_alignmask = alg->base.cra_alignmask;
inst->alg.ivsize = CTR_RFC3686_IV_SIZE;
- inst->alg.chunksize = crypto_skcipher_alg_chunksize(alg);
- inst->alg.min_keysize = crypto_skcipher_alg_min_keysize(alg) +
- CTR_RFC3686_NONCE_SIZE;
- inst->alg.max_keysize = crypto_skcipher_alg_max_keysize(alg) +
- CTR_RFC3686_NONCE_SIZE;
+ inst->alg.chunksize = alg->chunksize;
+ inst->alg.min_keysize = alg->min_keysize + CTR_RFC3686_NONCE_SIZE;
+ inst->alg.max_keysize = alg->max_keysize + CTR_RFC3686_NONCE_SIZE;
inst->alg.setkey = crypto_rfc3686_setkey;
inst->alg.encrypt = crypto_rfc3686_crypt;
--
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