40  * ubifs_hash_calc_hmac - calculate a HMAC from a hash
42  * @hash: the node to calculate a HMAC for
43  * @hmac: the returned HMAC
48 				 u8 *hmac)  in ubifs_hash_calc_hmac()  argument
50 	return crypto_shash_tfm_digest(c->hmac_tfm, hash, c->hash_len, hmac);  in ubifs_hash_calc_hmac()
60  * It creates a HMAC from the given input hash and writes it to the node.
82 	err = ubifs_hash_calc_hmac(c, hash, auth->hmac);  in ubifs_prepare_auth_node()
277 	snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",  in ubifs_init_authentication()
328 		ubifs_err(c, "hmac %s is bigger than maximum allowed hmac size (%d > %d)",  in ubifs_init_authentication()
378  * ubifs_node_calc_hmac - calculate the HMAC of a UBIFS node
380  * @node: the node to insert a HMAC into.
382  * @ofs_hmac: the offset in the node where the HMAC is inserted
383  * @hmac: returned HMAC
385  * This function calculates a HMAC of a UBIFS node. The HMAC is expected to be
386  * embedded into the node, so this area is not covered by the HMAC. Also not
390 				int len, int ofs_hmac, void *hmac)  in ubifs_node_calc_hmac()  argument
405 	/* behind common node header CRC up to HMAC begin */  in ubifs_node_calc_hmac()
410 	/* behind HMAC, if any */  in ubifs_node_calc_hmac()
418 	return crypto_shash_final(shash, hmac);  in ubifs_node_calc_hmac()
422  * __ubifs_node_insert_hmac - insert a HMAC into a UBIFS node
424  * @node: the node to insert a HMAC into.
426  * @ofs_hmac: the offset in the node where the HMAC is inserted
428  * This function inserts a HMAC at offset @ofs_hmac into the node given in
440  * __ubifs_node_verify_hmac - verify the HMAC of UBIFS node
442  * @node: the node to insert a HMAC into.
444  * @ofs_hmac: the offset in the node where the HMAC is inserted
446  * This function verifies the HMAC at offset @ofs_hmac of the node given in
453 	u8 *hmac;  in __ubifs_node_verify_hmac()  local
456 	hmac = kmalloc(hmac_len, GFP_NOFS);  in __ubifs_node_verify_hmac()
457 	if (!hmac)  in __ubifs_node_verify_hmac()
460 	err = ubifs_node_calc_hmac(c, node, len, ofs_hmac, hmac);  in __ubifs_node_verify_hmac()
462 		kfree(hmac);  in __ubifs_node_verify_hmac()
466 	err = crypto_memneq(hmac, node + ofs_hmac, hmac_len);  in __ubifs_node_verify_hmac()
468 	kfree(hmac);  in __ubifs_node_verify_hmac()
499  * ubifs_hmac_wkm - Create a HMAC of the well known message
501  * @hmac: The HMAC of the well known message
503  * This function creates a HMAC of a well known message. This is used
510 int ubifs_hmac_wkm(struct ubifs_info *c, u8 *hmac)  in ubifs_hmac_wkm()  argument
530 	err = crypto_shash_final(shash, hmac);  in ubifs_hmac_wkm()
537  * ubifs_hmac_zero - test if a HMAC is zero
539  * @hmac: the HMAC to test
541  * This function tests if a HMAC is zero and returns true if it is
544 bool ubifs_hmac_zero(struct ubifs_info *c, const u8 *hmac)  in ubifs_hmac_zero()  argument
546 	return !memchr_inv(hmac, 0, c->hmac_desc_len);  in ubifs_hmac_zero()