38  * ubifs_hash_calc_hmac - calculate a HMAC from a hash
40  * @hash: the node to calculate a HMAC for
41  * @hmac: the returned HMAC
46 				 u8 *hmac)  in ubifs_hash_calc_hmac()  argument
48 	return crypto_shash_tfm_digest(c->hmac_tfm, hash, c->hash_len, hmac);  in ubifs_hash_calc_hmac()
58  * It creates a HMAC from the given input hash and writes it to the node.
80 	err = ubifs_hash_calc_hmac(c, hash, auth->hmac);  in ubifs_prepare_auth_node()
275 	snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",  in ubifs_init_authentication()
326 		ubifs_err(c, "hmac %s is bigger than maximum allowed hmac size (%d > %d)",  in ubifs_init_authentication()
376  * ubifs_node_calc_hmac - calculate the HMAC of a UBIFS node
378  * @node: the node to insert a HMAC into.
380  * @ofs_hmac: the offset in the node where the HMAC is inserted
381  * @hmac: returned HMAC
383  * This function calculates a HMAC of a UBIFS node. The HMAC is expected to be
384  * embedded into the node, so this area is not covered by the HMAC. Also not
388 				int len, int ofs_hmac, void *hmac)  in ubifs_node_calc_hmac()  argument
403 	/* behind common node header CRC up to HMAC begin */  in ubifs_node_calc_hmac()
408 	/* behind HMAC, if any */  in ubifs_node_calc_hmac()
416 	return crypto_shash_final(shash, hmac);  in ubifs_node_calc_hmac()
420  * __ubifs_node_insert_hmac - insert a HMAC into a UBIFS node
422  * @node: the node to insert a HMAC into.
424  * @ofs_hmac: the offset in the node where the HMAC is inserted
426  * This function inserts a HMAC at offset @ofs_hmac into the node given in
438  * __ubifs_node_verify_hmac - verify the HMAC of UBIFS node
440  * @node: the node to insert a HMAC into.
442  * @ofs_hmac: the offset in the node where the HMAC is inserted
444  * This function verifies the HMAC at offset @ofs_hmac of the node given in
451 	u8 *hmac;  in __ubifs_node_verify_hmac()  local
454 	hmac = kmalloc(hmac_len, GFP_NOFS);  in __ubifs_node_verify_hmac()
455 	if (!hmac)  in __ubifs_node_verify_hmac()
458 	err = ubifs_node_calc_hmac(c, node, len, ofs_hmac, hmac);  in __ubifs_node_verify_hmac()
460 		kfree(hmac);  in __ubifs_node_verify_hmac()
464 	err = crypto_memneq(hmac, node + ofs_hmac, hmac_len);  in __ubifs_node_verify_hmac()
466 	kfree(hmac);  in __ubifs_node_verify_hmac()
497  * ubifs_hmac_wkm - Create a HMAC of the well known message
499  * @hmac: The HMAC of the well known message
501  * This function creates a HMAC of a well known message. This is used
508 int ubifs_hmac_wkm(struct ubifs_info *c, u8 *hmac)  in ubifs_hmac_wkm()  argument
516 				       sizeof(well_known_message) - 1, hmac);  in ubifs_hmac_wkm()
520  * ubifs_hmac_zero - test if a HMAC is zero
522  * @hmac: the HMAC to test
524  * This function tests if a HMAC is zero and returns true if it is
527 bool ubifs_hmac_zero(struct ubifs_info *c, const u8 *hmac)  in ubifs_hmac_zero()  argument
529 	return !memchr_inv(hmac, 0, c->hmac_desc_len);  in ubifs_hmac_zero()