diff options
| author | Eric Biggers <ebiggers@google.com> | 2020-05-02 08:31:21 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2020-05-08 08:32:15 +0300 |
| commit | bce395eea0f2da2b9ca2e78f101ade353686ee5c (patch) | |
| tree | 15c89d78d11f7bf2f68886e7639341a3b7874d40 | |
| parent | 75b93c635482dead3071fe60180b12191d3b3b0f (diff) | |
| download | linux-bce395eea0f2da2b9ca2e78f101ade353686ee5c.tar.xz | |
KEYS: encrypted: use crypto_shash_tfm_digest()
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: keyrings@vger.kernel.org
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
| -rw-r--r-- | security/keys/encrypted-keys/encrypted.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/security/keys/encrypted-keys/encrypted.c b/security/keys/encrypted-keys/encrypted.c index f6797ba44bf7..14cf81d1a30b 100644 --- a/security/keys/encrypted-keys/encrypted.c +++ b/security/keys/encrypted-keys/encrypted.c @@ -323,19 +323,6 @@ error: return ukey; } -static int calc_hash(struct crypto_shash *tfm, u8 *digest, - const u8 *buf, unsigned int buflen) -{ - SHASH_DESC_ON_STACK(desc, tfm); - int err; - - desc->tfm = tfm; - - err = crypto_shash_digest(desc, buf, buflen, digest); - shash_desc_zero(desc); - return err; -} - static int calc_hmac(u8 *digest, const u8 *key, unsigned int keylen, const u8 *buf, unsigned int buflen) { @@ -351,7 +338,7 @@ static int calc_hmac(u8 *digest, const u8 *key, unsigned int keylen, err = crypto_shash_setkey(tfm, key, keylen); if (!err) - err = calc_hash(tfm, digest, buf, buflen); + err = crypto_shash_tfm_digest(tfm, buf, buflen, digest); crypto_free_shash(tfm); return err; } @@ -381,7 +368,8 @@ static int get_derived_key(u8 *derived_key, enum derived_key_type key_type, memcpy(derived_buf + strlen(derived_buf) + 1, master_key, master_keylen); - ret = calc_hash(hash_tfm, derived_key, derived_buf, derived_buf_len); + ret = crypto_shash_tfm_digest(hash_tfm, derived_buf, derived_buf_len, + derived_key); kzfree(derived_buf); return ret; } |