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fscrypt: 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 22:31:15 -07:00 committed by Herbert Xu
parent 96a5aa721d
commit 3e185a56eb
2 changed files with 2 additions and 11 deletions
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7
fs/crypto/fname.c
View File

@ -83,13 +83,8 @@ static int fscrypt_do_sha256(const u8 *data, unsigned int data_len, u8 *result)
tfm = prev_tfm;
}
}
{
SHASH_DESC_ON_STACK(desc, tfm);
desc->tfm = tfm;
return crypto_shash_digest(desc, data, data_len, result);
}
return crypto_shash_tfm_digest(tfm, data, data_len, result);
}
static inline bool fscrypt_is_dot_dotdot(const struct qstr *str)

6
fs/crypto/hkdf.c
View File

@ -44,17 +44,13 @@ static int hkdf_extract(struct crypto_shash *hmac_tfm, const u8 *ikm,
unsigned int ikmlen, u8 prk[HKDF_HASHLEN])
{
static const u8 default_salt[HKDF_HASHLEN];
SHASH_DESC_ON_STACK(desc, hmac_tfm);
int err;
err = crypto_shash_setkey(hmac_tfm, default_salt, HKDF_HASHLEN);
if (err)
return err;
desc->tfm = hmac_tfm;
err = crypto_shash_digest(desc, ikm, ikmlen, prk);
shash_desc_zero(desc);
return err;
return crypto_shash_tfm_digest(hmac_tfm, ikm, ikmlen, prk);
}
/*