From: Eric Biggers <ebiggers@xxxxxxxxxx>
Instead of manually allocating a 'struct shash_desc' on the stack and
calling crypto_shash_digest(), switch to using the new helper function
crypto_shash_tfm_digest() which does this for us.
Cc: linux-sctp@xxxxxxxxxxxxxxx
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
net/sctp/auth.c | 10 ++--------
net/sctp/sm_make_chunk.c | 23 ++++++++---------------
2 files changed, 10 insertions(+), 23 deletions(-)
diff --git a/net/sctp/auth.c b/net/sctp/auth.c
index 4278764d82b827..83e97e8892e05a 100644
--- a/net/sctp/auth.c
+++ b/net/sctp/auth.c
@@ -741,14 +741,8 @@ void sctp_auth_calculate_hmac(const struct sctp_association *asoc,
if (crypto_shash_setkey(tfm, &asoc_key->data[0], asoc_key->len))
goto free;
- {
- SHASH_DESC_ON_STACK(desc, tfm);
-
- desc->tfm = tfm;
- crypto_shash_digest(desc, (u8 *)auth,
- end - (unsigned char *)auth, digest);
- shash_desc_zero(desc);
- }
+ crypto_shash_tfm_digest(tfm, (u8 *)auth, end - (unsigned char *)auth,
+ digest);
free:
if (free_key)
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 09050c1d5517e7..c786215ba69a54 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1666,17 +1666,14 @@ static struct sctp_cookie_param *sctp_pack_cookie(
ntohs(init_chunk->chunk_hdr->length), raw_addrs, addrs_len);
if (sctp_sk(ep->base.sk)->hmac) {
- SHASH_DESC_ON_STACK(desc, sctp_sk(ep->base.sk)->hmac);
+ struct crypto_shash *tfm = sctp_sk(ep->base.sk)->hmac;
int err;
/* Sign the message. */
- desc->tfm = sctp_sk(ep->base.sk)->hmac;
-
- err = crypto_shash_setkey(desc->tfm, ep->secret_key,
+ err = crypto_shash_setkey(tfm, ep->secret_key,
sizeof(ep->secret_key)) ?:
- crypto_shash_digest(desc, (u8 *)&cookie->c, bodysize,
- cookie->signature);
- shash_desc_zero(desc);
+ crypto_shash_tfm_digest(tfm, (u8 *)&cookie->c, bodysize,
+ cookie->signature);
if (err)
goto free_cookie;
}
@@ -1737,17 +1734,13 @@ struct sctp_association *sctp_unpack_cookie(
/* Check the signature. */
{
- SHASH_DESC_ON_STACK(desc, sctp_sk(ep->base.sk)->hmac);
+ struct crypto_shash *tfm = sctp_sk(ep->base.sk)->hmac;
int err;
- desc->tfm = sctp_sk(ep->base.sk)->hmac;
-
- err = crypto_shash_setkey(desc->tfm, ep->secret_key,
+ err = crypto_shash_setkey(tfm, ep->secret_key,
sizeof(ep->secret_key)) ?:
- crypto_shash_digest(desc, (u8 *)bear_cookie, bodysize,
- digest);
- shash_desc_zero(desc);
-
+ crypto_shash_tfm_digest(tfm, (u8 *)bear_cookie, bodysize,
+ digest);
if (err) {
*error = -SCTP_IERROR_NOMEM;
goto fail;
--
2.26.2
