28 int __ubifs_node_calc_hash(const struct ubifs_info *c, const void *node,  in __ubifs_node_calc_hash()  argument
33 	return crypto_shash_tfm_digest(c->hash_tfm, node, le32_to_cpu(ch->len),  in __ubifs_node_calc_hash()
45 static int ubifs_hash_calc_hmac(const struct ubifs_info *c, const u8 *hash,  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()
62 int ubifs_prepare_auth_node(struct ubifs_info *c, void *node,  in ubifs_prepare_auth_node()  argument
70 		SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm);  in ubifs_prepare_auth_node()
72 		hash_desc->tfm = c->hash_tfm;  in ubifs_prepare_auth_node()
73 		ubifs_shash_copy_state(c, inhash, hash_desc);  in ubifs_prepare_auth_node()
80 	err = ubifs_hash_calc_hmac(c, hash, auth->hmac);  in ubifs_prepare_auth_node()
85 	ubifs_prepare_node(c, auth, ubifs_auth_node_sz(c), 0);  in ubifs_prepare_auth_node()
89 static struct shash_desc *ubifs_get_desc(const struct ubifs_info *c,  in ubifs_get_desc()  argument
95 	if (!ubifs_authenticated(c))  in ubifs_get_desc()
120 struct shash_desc *__ubifs_hash_get_desc(const struct ubifs_info *c)  in __ubifs_hash_get_desc()  argument
122 	return ubifs_get_desc(c, c->hash_tfm);  in __ubifs_hash_get_desc()
136 void ubifs_bad_hash(const struct ubifs_info *c, const void *node, const u8 *hash,  in ubifs_bad_hash()  argument
139 	int len = min(c->hash_len, 20);  in ubifs_bad_hash()
140 	int cropped = len != c->hash_len;  in ubifs_bad_hash()
145 	__ubifs_node_calc_hash(c, node, calc);  in ubifs_bad_hash()
147 	ubifs_err(c, "hash mismatch on node at LEB %d:%d", lnum, offs);  in ubifs_bad_hash()
148 	ubifs_err(c, "hash expected:   %*ph%s", len, hash, cont);  in ubifs_bad_hash()
149 	ubifs_err(c, "hash calculated: %*ph%s", len, calc, cont);  in ubifs_bad_hash()
162 int __ubifs_node_check_hash(const struct ubifs_info *c, const void *node,  in __ubifs_node_check_hash()  argument
168 	err = __ubifs_node_calc_hash(c, node, calc);  in __ubifs_node_check_hash()
172 	if (ubifs_check_hash(c, expected, calc))  in __ubifs_node_check_hash()
190 int ubifs_sb_verify_signature(struct ubifs_info *c,  in ubifs_sb_verify_signature()  argument
198 	sleb = ubifs_scan(c, UBIFS_SB_LNUM, UBIFS_SB_NODE_SZ, c->sbuf, 0);  in ubifs_sb_verify_signature()
205 		ubifs_err(c, "Unable to find signature node");  in ubifs_sb_verify_signature()
213 		ubifs_err(c, "Signature node is of wrong type");  in ubifs_sb_verify_signature()
221 		ubifs_err(c, "invalid signature len %d", le32_to_cpu(signode->len));  in ubifs_sb_verify_signature()
227 		ubifs_err(c, "Signature type %d is not supported\n",  in ubifs_sb_verify_signature()
239 		ubifs_err(c, "Failed to verify signature");  in ubifs_sb_verify_signature()
241 		ubifs_msg(c, "Successfully verified super block signature");  in ubifs_sb_verify_signature()
255 int ubifs_init_authentication(struct ubifs_info *c)  in ubifs_init_authentication()  argument
262 	if (!c->auth_hash_name) {  in ubifs_init_authentication()
263 		ubifs_err(c, "authentication hash name needed with authentication");  in ubifs_init_authentication()
267 	c->auth_hash_algo = match_string(hash_algo_name, HASH_ALGO__LAST,  in ubifs_init_authentication()
268 					 c->auth_hash_name);  in ubifs_init_authentication()
269 	if ((int)c->auth_hash_algo < 0) {  in ubifs_init_authentication()
270 		ubifs_err(c, "Unknown hash algo %s specified",  in ubifs_init_authentication()
271 			  c->auth_hash_name);  in ubifs_init_authentication()
276 		 c->auth_hash_name);  in ubifs_init_authentication()
278 	keyring_key = request_key(&key_type_logon, c->auth_key_name, NULL);  in ubifs_init_authentication()
281 		ubifs_err(c, "Failed to request key: %ld",  in ubifs_init_authentication()
289 		ubifs_err(c, "key type must be logon");  in ubifs_init_authentication()
301 	c->hash_tfm = crypto_alloc_shash(c->auth_hash_name, 0, 0);  in ubifs_init_authentication()
302 	if (IS_ERR(c->hash_tfm)) {  in ubifs_init_authentication()
303 		err = PTR_ERR(c->hash_tfm);  in ubifs_init_authentication()
304 		ubifs_err(c, "Can not allocate %s: %d",  in ubifs_init_authentication()
305 			  c->auth_hash_name, err);  in ubifs_init_authentication()
309 	c->hash_len = crypto_shash_digestsize(c->hash_tfm);  in ubifs_init_authentication()
310 	if (c->hash_len > UBIFS_HASH_ARR_SZ) {  in ubifs_init_authentication()
311 		ubifs_err(c, "hash %s is bigger than maximum allowed hash size (%d > %d)",  in ubifs_init_authentication()
312 			  c->auth_hash_name, c->hash_len, UBIFS_HASH_ARR_SZ);  in ubifs_init_authentication()
317 	c->hmac_tfm = crypto_alloc_shash(hmac_name, 0, 0);  in ubifs_init_authentication()
318 	if (IS_ERR(c->hmac_tfm)) {  in ubifs_init_authentication()
319 		err = PTR_ERR(c->hmac_tfm);  in ubifs_init_authentication()
320 		ubifs_err(c, "Can not allocate %s: %d", hmac_name, err);  in ubifs_init_authentication()
324 	c->hmac_desc_len = crypto_shash_digestsize(c->hmac_tfm);  in ubifs_init_authentication()
325 	if (c->hmac_desc_len > UBIFS_HMAC_ARR_SZ) {  in ubifs_init_authentication()
326 		ubifs_err(c, "hmac %s is bigger than maximum allowed hmac size (%d > %d)",  in ubifs_init_authentication()
327 			  hmac_name, c->hmac_desc_len, UBIFS_HMAC_ARR_SZ);  in ubifs_init_authentication()
332 	err = crypto_shash_setkey(c->hmac_tfm, ukp->data, ukp->datalen);  in ubifs_init_authentication()
336 	c->authenticated = true;  in ubifs_init_authentication()
338 	c->log_hash = ubifs_hash_get_desc(c);  in ubifs_init_authentication()
339 	if (IS_ERR(c->log_hash)) {  in ubifs_init_authentication()
340 		err = PTR_ERR(c->log_hash);  in ubifs_init_authentication()
348 		crypto_free_shash(c->hmac_tfm);  in ubifs_init_authentication()
351 		crypto_free_shash(c->hash_tfm);  in ubifs_init_authentication()
365 void __ubifs_exit_authentication(struct ubifs_info *c)  in __ubifs_exit_authentication()  argument
367 	if (!ubifs_authenticated(c))  in __ubifs_exit_authentication()
370 	crypto_free_shash(c->hmac_tfm);  in __ubifs_exit_authentication()
371 	crypto_free_shash(c->hash_tfm);  in __ubifs_exit_authentication()
372 	kfree(c->log_hash);  in __ubifs_exit_authentication()
387 static int ubifs_node_calc_hmac(const struct ubifs_info *c, const void *node,  in ubifs_node_calc_hmac()  argument
390 	SHASH_DESC_ON_STACK(shash, c->hmac_tfm);  in ubifs_node_calc_hmac()
391 	int hmac_len = c->hmac_desc_len;  in ubifs_node_calc_hmac()
394 	ubifs_assert(c, ofs_hmac > 8);  in ubifs_node_calc_hmac()
395 	ubifs_assert(c, ofs_hmac + hmac_len < len);  in ubifs_node_calc_hmac()
397 	shash->tfm = c->hmac_tfm;  in ubifs_node_calc_hmac()
431 int __ubifs_node_insert_hmac(const struct ubifs_info *c, void *node, int len,  in __ubifs_node_insert_hmac()  argument
434 	return ubifs_node_calc_hmac(c, node, len, ofs_hmac, node + ofs_hmac);  in __ubifs_node_insert_hmac()
447 int __ubifs_node_verify_hmac(const struct ubifs_info *c, const void *node,  in __ubifs_node_verify_hmac()  argument
450 	int hmac_len = c->hmac_desc_len;  in __ubifs_node_verify_hmac()
458 	err = ubifs_node_calc_hmac(c, node, len, ofs_hmac, hmac);  in __ubifs_node_verify_hmac()
474 int __ubifs_shash_copy_state(const struct ubifs_info *c, struct shash_desc *src,  in __ubifs_shash_copy_state()  argument
508 int ubifs_hmac_wkm(struct ubifs_info *c, u8 *hmac)  in ubifs_hmac_wkm()  argument
512 	if (!ubifs_authenticated(c))  in ubifs_hmac_wkm()
515 	return crypto_shash_tfm_digest(c->hmac_tfm, well_known_message,  in ubifs_hmac_wkm()
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()