return data == 0xFFFFFFFF;
}
+/* authenticate_sleb_hash and authenticate_sleb_hmac are split out for stack usage */
+static int authenticate_sleb_hash(struct ubifs_info *c, struct shash_desc *log_hash, u8 *hash)
+{
+ SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm);
+
+ hash_desc->tfm = c->hash_tfm;
+ hash_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ ubifs_shash_copy_state(c, log_hash, hash_desc);
+ return crypto_shash_final(hash_desc, hash);
+}
+
+static int authenticate_sleb_hmac(struct ubifs_info *c, u8 *hash, u8 *hmac)
+{
+ SHASH_DESC_ON_STACK(hmac_desc, c->hmac_tfm);
+
+ hmac_desc->tfm = c->hmac_tfm;
+ hmac_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
+
+ return crypto_shash_digest(hmac_desc, hash, c->hash_len, hmac);
+}
+
/**
* authenticate_sleb - authenticate one scan LEB
* @c: UBIFS file-system description object
if (snod->type == UBIFS_AUTH_NODE) {
struct ubifs_auth_node *auth = snod->node;
- SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm);
- SHASH_DESC_ON_STACK(hmac_desc, c->hmac_tfm);
-
- hash_desc->tfm = c->hash_tfm;
- hash_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
- ubifs_shash_copy_state(c, log_hash, hash_desc);
- err = crypto_shash_final(hash_desc, hash);
+ err = authenticate_sleb_hash(c, log_hash, hash);
if (err)
goto out;
- hmac_desc->tfm = c->hmac_tfm;
- hmac_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
- err = crypto_shash_digest(hmac_desc, hash, c->hash_len,
- hmac);
+ err = authenticate_sleb_hmac(c, hash, hmac);
if (err)
goto out;