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crypto: n2 - use crypto_shash_tfm_digest()

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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.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2020-05-01 22:31:11 -07:00 committed by Herbert Xu
parent e0077ea8ee
commit ce8e04888d
1 changed files with 2 additions and 5 deletions
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7
drivers/crypto/n2_core.c
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@ -462,7 +462,6 @@ static int n2_hmac_async_setkey(struct crypto_ahash *tfm, const u8 *key,
struct n2_hmac_ctx *ctx = crypto_ahash_ctx(tfm);
struct crypto_shash *child_shash = ctx->child_shash;
struct crypto_ahash *fallback_tfm;
SHASH_DESC_ON_STACK(shash, child_shash);
int err, bs, ds;
fallback_tfm = ctx->base.fallback_tfm;
@ -470,14 +469,12 @@ static int n2_hmac_async_setkey(struct crypto_ahash *tfm, const u8 *key,
if (err)
return err;
shash->tfm = child_shash;
bs = crypto_shash_blocksize(child_shash);
ds = crypto_shash_digestsize(child_shash);
BUG_ON(ds > N2_HASH_KEY_MAX);
if (keylen > bs) {
err = crypto_shash_digest(shash, key, keylen,
ctx->hash_key);
err = crypto_shash_tfm_digest(child_shash, key, keylen,
ctx->hash_key);
if (err)
return err;
keylen = ds;