70 int restrict_link_by_signature(struct key *dest_keyring,  in restrict_link_by_signature()
73 			       struct key *trust_keyring)  in restrict_link_by_signature()
76 	struct key *key;  in restrict_link_by_signature()  local
97 	key = find_asymmetric_key(trust_keyring,  in restrict_link_by_signature()
100 	if (IS_ERR(key))  in restrict_link_by_signature()
103 	if (use_builtin_keys && !test_bit(KEY_FLAG_BUILTIN, &key->flags))  in restrict_link_by_signature()
106 		ret = verify_signature(key, sig);  in restrict_link_by_signature()
107 	key_put(key);  in restrict_link_by_signature()
118 static int key_or_keyring_common(struct key *dest_keyring,  in key_or_keyring_common()
121 				 struct key *trusted, bool check_dest)  in key_or_keyring_common()
124 	struct key *key = NULL;  in key_or_keyring_common()  local
149 			key = find_asymmetric_key(trusted, sig->auth_ids[0],  in key_or_keyring_common()
151 			if (IS_ERR(key))  in key_or_keyring_common()
152 				key = NULL;  in key_or_keyring_common()
180 					key = __key_get(trusted);  in key_or_keyring_common()
186 				key = __key_get(trusted);  in key_or_keyring_common()
193 	if (check_dest && !key) {  in key_or_keyring_common()
195 		key = find_asymmetric_key(dest_keyring, sig->auth_ids[0],  in key_or_keyring_common()
197 		if (IS_ERR(key))  in key_or_keyring_common()
198 			key = NULL;  in key_or_keyring_common()
201 	if (!key)  in key_or_keyring_common()
204 	ret = key_validate(key);  in key_or_keyring_common()
206 		ret = verify_signature(key, sig);  in key_or_keyring_common()
208 	key_put(key);  in key_or_keyring_common()
230 int restrict_link_by_key_or_keyring(struct key *dest_keyring,  in restrict_link_by_key_or_keyring()
233 				    struct key *trusted)  in restrict_link_by_key_or_keyring()
257 int restrict_link_by_key_or_keyring_chain(struct key *dest_keyring,  in restrict_link_by_key_or_keyring_chain()
260 					  struct key *trusted)  in restrict_link_by_key_or_keyring_chain()