30 int __ubifs_node_calc_hash(const struct ubifs_info *c, const void *node,  in __ubifs_node_calc_hash()  argument
34 	SHASH_DESC_ON_STACK(shash, c->hash_tfm);  in __ubifs_node_calc_hash()
37 	shash->tfm = c->hash_tfm;  in __ubifs_node_calc_hash()
53 static int ubifs_hash_calc_hmac(const struct ubifs_info *c, const u8 *hash,  in ubifs_hash_calc_hmac()  argument
56 	SHASH_DESC_ON_STACK(shash, c->hmac_tfm);  in ubifs_hash_calc_hmac()
59 	shash->tfm = c->hmac_tfm;  in ubifs_hash_calc_hmac()
61 	err = crypto_shash_digest(shash, hash, c->hash_len, hmac);  in ubifs_hash_calc_hmac()
78 int ubifs_prepare_auth_node(struct ubifs_info *c, void *node,  in ubifs_prepare_auth_node()  argument
85 	hash = kmalloc(crypto_shash_descsize(c->hash_tfm), GFP_NOFS);  in ubifs_prepare_auth_node()
90 		SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm);  in ubifs_prepare_auth_node()
92 		hash_desc->tfm = c->hash_tfm;  in ubifs_prepare_auth_node()
93 		ubifs_shash_copy_state(c, inhash, hash_desc);  in ubifs_prepare_auth_node()
100 	err = ubifs_hash_calc_hmac(c, hash, auth->hmac);  in ubifs_prepare_auth_node()
105 	ubifs_prepare_node(c, auth, ubifs_auth_node_sz(c), 0);  in ubifs_prepare_auth_node()
114 static struct shash_desc *ubifs_get_desc(const struct ubifs_info *c,  in ubifs_get_desc()  argument
120 	if (!ubifs_authenticated(c))  in ubifs_get_desc()
145 struct shash_desc *__ubifs_hash_get_desc(const struct ubifs_info *c)  in __ubifs_hash_get_desc()  argument
147 	return ubifs_get_desc(c, c->hash_tfm);  in __ubifs_hash_get_desc()
161 void ubifs_bad_hash(const struct ubifs_info *c, const void *node, const u8 *hash,  in ubifs_bad_hash()  argument
164 	int len = min(c->hash_len, 20);  in ubifs_bad_hash()
165 	int cropped = len != c->hash_len;  in ubifs_bad_hash()
170 	__ubifs_node_calc_hash(c, node, calc);  in ubifs_bad_hash()
172 	ubifs_err(c, "hash mismatch on node at LEB %d:%d", lnum, offs);  in ubifs_bad_hash()
173 	ubifs_err(c, "hash expected:   %*ph%s", len, hash, cont);  in ubifs_bad_hash()
174 	ubifs_err(c, "hash calculated: %*ph%s", len, calc, cont);  in ubifs_bad_hash()
187 int __ubifs_node_check_hash(const struct ubifs_info *c, const void *node,  in __ubifs_node_check_hash()  argument
193 	err = __ubifs_node_calc_hash(c, node, calc);  in __ubifs_node_check_hash()
197 	if (ubifs_check_hash(c, expected, calc))  in __ubifs_node_check_hash()
215 int ubifs_sb_verify_signature(struct ubifs_info *c,  in ubifs_sb_verify_signature()  argument
223 	sleb = ubifs_scan(c, UBIFS_SB_LNUM, UBIFS_SB_NODE_SZ, c->sbuf, 0);  in ubifs_sb_verify_signature()
230 		ubifs_err(c, "Unable to find signature node");  in ubifs_sb_verify_signature()
238 		ubifs_err(c, "Signature node is of wrong type");  in ubifs_sb_verify_signature()
246 		ubifs_err(c, "invalid signature len %d", le32_to_cpu(signode->len));  in ubifs_sb_verify_signature()
252 		ubifs_err(c, "Signature type %d is not supported\n",  in ubifs_sb_verify_signature()
264 		ubifs_err(c, "Failed to verify signature");  in ubifs_sb_verify_signature()
266 		ubifs_msg(c, "Successfully verified super block signature");  in ubifs_sb_verify_signature()
280 int ubifs_init_authentication(struct ubifs_info *c)  in ubifs_init_authentication()  argument
287 	if (!c->auth_hash_name) {  in ubifs_init_authentication()
288 		ubifs_err(c, "authentication hash name needed with authentication");  in ubifs_init_authentication()
292 	c->auth_hash_algo = match_string(hash_algo_name, HASH_ALGO__LAST,  in ubifs_init_authentication()
293 					 c->auth_hash_name);  in ubifs_init_authentication()
294 	if ((int)c->auth_hash_algo < 0) {  in ubifs_init_authentication()
295 		ubifs_err(c, "Unknown hash algo %s specified",  in ubifs_init_authentication()
296 			  c->auth_hash_name);  in ubifs_init_authentication()
301 		 c->auth_hash_name);  in ubifs_init_authentication()
303 	keyring_key = request_key(&key_type_logon, c->auth_key_name, NULL);  in ubifs_init_authentication()
306 		ubifs_err(c, "Failed to request key: %ld",  in ubifs_init_authentication()
314 		ubifs_err(c, "key type must be logon");  in ubifs_init_authentication()
326 	c->hash_tfm = crypto_alloc_shash(c->auth_hash_name, 0, 0);  in ubifs_init_authentication()
327 	if (IS_ERR(c->hash_tfm)) {  in ubifs_init_authentication()
328 		err = PTR_ERR(c->hash_tfm);  in ubifs_init_authentication()
329 		ubifs_err(c, "Can not allocate %s: %d",  in ubifs_init_authentication()
330 			  c->auth_hash_name, err);  in ubifs_init_authentication()
334 	c->hash_len = crypto_shash_digestsize(c->hash_tfm);  in ubifs_init_authentication()
335 	if (c->hash_len > UBIFS_HASH_ARR_SZ) {  in ubifs_init_authentication()
336 		ubifs_err(c, "hash %s is bigger than maximum allowed hash size (%d > %d)",  in ubifs_init_authentication()
337 			  c->auth_hash_name, c->hash_len, UBIFS_HASH_ARR_SZ);  in ubifs_init_authentication()
342 	c->hmac_tfm = crypto_alloc_shash(hmac_name, 0, 0);  in ubifs_init_authentication()
343 	if (IS_ERR(c->hmac_tfm)) {  in ubifs_init_authentication()
344 		err = PTR_ERR(c->hmac_tfm);  in ubifs_init_authentication()
345 		ubifs_err(c, "Can not allocate %s: %d", hmac_name, err);  in ubifs_init_authentication()
349 	c->hmac_desc_len = crypto_shash_digestsize(c->hmac_tfm);  in ubifs_init_authentication()
350 	if (c->hmac_desc_len > UBIFS_HMAC_ARR_SZ) {  in ubifs_init_authentication()
351 		ubifs_err(c, "hmac %s is bigger than maximum allowed hmac size (%d > %d)",  in ubifs_init_authentication()
352 			  hmac_name, c->hmac_desc_len, UBIFS_HMAC_ARR_SZ);  in ubifs_init_authentication()
357 	err = crypto_shash_setkey(c->hmac_tfm, ukp->data, ukp->datalen);  in ubifs_init_authentication()
361 	c->authenticated = true;  in ubifs_init_authentication()
363 	c->log_hash = ubifs_hash_get_desc(c);  in ubifs_init_authentication()
364 	if (IS_ERR(c->log_hash))  in ubifs_init_authentication()
371 		crypto_free_shash(c->hmac_tfm);  in ubifs_init_authentication()
374 		crypto_free_shash(c->hash_tfm);  in ubifs_init_authentication()
388 void __ubifs_exit_authentication(struct ubifs_info *c)  in __ubifs_exit_authentication()  argument
390 	if (!ubifs_authenticated(c))  in __ubifs_exit_authentication()
393 	crypto_free_shash(c->hmac_tfm);  in __ubifs_exit_authentication()
394 	crypto_free_shash(c->hash_tfm);  in __ubifs_exit_authentication()
395 	kfree(c->log_hash);  in __ubifs_exit_authentication()
410 static int ubifs_node_calc_hmac(const struct ubifs_info *c, const void *node,  in ubifs_node_calc_hmac()  argument
413 	SHASH_DESC_ON_STACK(shash, c->hmac_tfm);  in ubifs_node_calc_hmac()
414 	int hmac_len = c->hmac_desc_len;  in ubifs_node_calc_hmac()
417 	ubifs_assert(c, ofs_hmac > 8);  in ubifs_node_calc_hmac()
418 	ubifs_assert(c, ofs_hmac + hmac_len < len);  in ubifs_node_calc_hmac()
420 	shash->tfm = c->hmac_tfm;  in ubifs_node_calc_hmac()
454 int __ubifs_node_insert_hmac(const struct ubifs_info *c, void *node, int len,  in __ubifs_node_insert_hmac()  argument
457 	return ubifs_node_calc_hmac(c, node, len, ofs_hmac, node + ofs_hmac);  in __ubifs_node_insert_hmac()
470 int __ubifs_node_verify_hmac(const struct ubifs_info *c, const void *node,  in __ubifs_node_verify_hmac()  argument
473 	int hmac_len = c->hmac_desc_len;  in __ubifs_node_verify_hmac()
481 	err = ubifs_node_calc_hmac(c, node, len, ofs_hmac, hmac);  in __ubifs_node_verify_hmac()
497 int __ubifs_shash_copy_state(const struct ubifs_info *c, struct shash_desc *src,  in __ubifs_shash_copy_state()  argument
531 int ubifs_hmac_wkm(struct ubifs_info *c, u8 *hmac)  in ubifs_hmac_wkm()  argument
533 	SHASH_DESC_ON_STACK(shash, c->hmac_tfm);  in ubifs_hmac_wkm()
537 	if (!ubifs_authenticated(c))  in ubifs_hmac_wkm()
540 	shash->tfm = c->hmac_tfm;  in ubifs_hmac_wkm()
565 bool ubifs_hmac_zero(struct ubifs_info *c, const u8 *hmac)  in ubifs_hmac_zero()  argument
567 	return !memchr_inv(hmac, 0, c->hmac_desc_len);  in ubifs_hmac_zero()