39  * ubifs_hash_calc_hmac - calculate a HMAC from a hash
41  * @hash: the node to calculate a HMAC for
42  * @hmac: the returned HMAC
47 				 u8 *hmac)  in ubifs_hash_calc_hmac()  argument
49 	return crypto_shash_tfm_digest(c->hmac_tfm, hash, c->hash_len, hmac);  in ubifs_hash_calc_hmac()
59  * It creates a HMAC from the given input hash and writes it to the node.
81 	err = ubifs_hash_calc_hmac(c, hash, auth->hmac);  in ubifs_prepare_auth_node()
276 	snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",  in ubifs_init_authentication()
327 		ubifs_err(c, "hmac %s is bigger than maximum allowed hmac size (%d > %d)",  in ubifs_init_authentication()
377  * ubifs_node_calc_hmac - calculate the HMAC of a UBIFS node
379  * @node: the node to insert a HMAC into.
381  * @ofs_hmac: the offset in the node where the HMAC is inserted
382  * @hmac: returned HMAC
384  * This function calculates a HMAC of a UBIFS node. The HMAC is expected to be
385  * embedded into the node, so this area is not covered by the HMAC. Also not
389 				int len, int ofs_hmac, void *hmac)  in ubifs_node_calc_hmac()  argument
404 	/* behind common node header CRC up to HMAC begin */  in ubifs_node_calc_hmac()
409 	/* behind HMAC, if any */  in ubifs_node_calc_hmac()
417 	return crypto_shash_final(shash, hmac);  in ubifs_node_calc_hmac()
421  * __ubifs_node_insert_hmac - insert a HMAC into a UBIFS node
423  * @node: the node to insert a HMAC into.
425  * @ofs_hmac: the offset in the node where the HMAC is inserted
427  * This function inserts a HMAC at offset @ofs_hmac into the node given in
439  * __ubifs_node_verify_hmac - verify the HMAC of UBIFS node
441  * @node: the node to insert a HMAC into.
443  * @ofs_hmac: the offset in the node where the HMAC is inserted
445  * This function verifies the HMAC at offset @ofs_hmac of the node given in
452 	u8 *hmac;  in __ubifs_node_verify_hmac()  local
455 	hmac = kmalloc(hmac_len, GFP_NOFS);  in __ubifs_node_verify_hmac()
456 	if (!hmac)  in __ubifs_node_verify_hmac()
459 	err = ubifs_node_calc_hmac(c, node, len, ofs_hmac, hmac);  in __ubifs_node_verify_hmac()
461 		kfree(hmac);  in __ubifs_node_verify_hmac()
465 	err = crypto_memneq(hmac, node + ofs_hmac, hmac_len);  in __ubifs_node_verify_hmac()
467 	kfree(hmac);  in __ubifs_node_verify_hmac()
498  * ubifs_hmac_wkm - Create a HMAC of the well known message
500  * @hmac: The HMAC of the well known message
502  * This function creates a HMAC of a well known message. This is used
509 int ubifs_hmac_wkm(struct ubifs_info *c, u8 *hmac)  in ubifs_hmac_wkm()  argument
529 	err = crypto_shash_final(shash, hmac);  in ubifs_hmac_wkm()
536  * ubifs_hmac_zero - test if a HMAC is zero
538  * @hmac: the HMAC to test
540  * This function tests if a HMAC is zero and returns true if it is
543 bool ubifs_hmac_zero(struct ubifs_info *c, const u8 *hmac)  in ubifs_hmac_zero()  argument
545 	return !memchr_inv(hmac, 0, c->hmac_desc_len);  in ubifs_hmac_zero()