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2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d 
 kernel/security/keys/internal.h
....@@ -1,12 +1,8 @@
1
+/* SPDX-License-Identifier: GPL-2.0-or-later */
12 /* Authentication token and access key management internal defs
23  *
34  * Copyright (C) 2003-5, 2007 Red Hat, Inc. All Rights Reserved.
45  * Written by David Howells (dhowells@redhat.com)
5
- *
6
- * This program is free software; you can redistribute it and/or
7
- * modify it under the terms of the GNU General Public License
8
- * as published by the Free Software Foundation; either version
9
- * 2 of the License, or (at your option) any later version.
106  */
117 
128 #ifndef _INTERNAL_H
....@@ -19,6 +15,7 @@
1915 #include <linux/task_work.h>
2016 #include <linux/keyctl.h>
2117 #include <linux/refcount.h>
18
+#include <linux/watch_queue.h>
2219 #include <linux/compat.h>
2320 #include <linux/mm.h>
2421 #include <linux/vmalloc.h>
....@@ -91,15 +88,20 @@
9188 extern struct mutex key_construction_mutex;
9289 extern wait_queue_head_t request_key_conswq;
9390 
94
-
91
+extern void key_set_index_key(struct keyring_index_key *index_key);
9592 extern struct key_type *key_type_lookup(const char *type);
9693 extern void key_type_put(struct key_type *ktype);
9794 
95
+extern int __key_link_lock(struct key *keyring,
96
+			   const struct keyring_index_key *index_key);
97
+extern int __key_move_lock(struct key *l_keyring, struct key *u_keyring,
98
+			   const struct keyring_index_key *index_key);
9899 extern int __key_link_begin(struct key *keyring,
99100 			    const struct keyring_index_key *index_key,
100101 			    struct assoc_array_edit **_edit);
101102 extern int __key_link_check_live_key(struct key *keyring, struct key *key);
102
-extern void __key_link(struct key *key, struct assoc_array_edit **_edit);
103
+extern void __key_link(struct key *keyring, struct key *key,
104
+		       struct assoc_array_edit **_edit);
103105 extern void __key_link_end(struct key *keyring,
104106 			   const struct keyring_index_key *index_key,
105107 			   struct assoc_array_edit *edit);
....@@ -125,6 +127,7 @@
125127 #define KEYRING_SEARCH_NO_CHECK_PERM	0x0008	/* Don't check permissions */
126128 #define KEYRING_SEARCH_DETECT_TOO_DEEP	0x0010	/* Give an error on excessive depth */
127129 #define KEYRING_SEARCH_SKIP_EXPIRED	0x0020	/* Ignore expired keys (intention to replace) */
130
+#define KEYRING_SEARCH_RECURSE		0x0040	/* Search child keyrings also */
128131 
129132 	int (*iterator)(const void *object, void *iterator_data);
130133 
....@@ -137,21 +140,23 @@
137140 
138141 extern bool key_default_cmp(const struct key *key,
139142 			    const struct key_match_data *match_data);
140
-extern key_ref_t keyring_search_aux(key_ref_t keyring_ref,
143
+extern key_ref_t keyring_search_rcu(key_ref_t keyring_ref,
141144 				    struct keyring_search_context *ctx);
142145 
143
-extern key_ref_t search_my_process_keyrings(struct keyring_search_context *ctx);
144
-extern key_ref_t search_process_keyrings(struct keyring_search_context *ctx);
146
+extern key_ref_t search_cred_keyrings_rcu(struct keyring_search_context *ctx);
147
+extern key_ref_t search_process_keyrings_rcu(struct keyring_search_context *ctx);
145148 
146149 extern struct key *find_keyring_by_name(const char *name, bool uid_keyring);
147150 
148
-extern int install_user_keyrings(void);
151
+extern int look_up_user_keyrings(struct key **, struct key **);
152
+extern struct key *get_user_session_keyring_rcu(const struct cred *);
149153 extern int install_thread_keyring_to_cred(struct cred *);
150154 extern int install_process_keyring_to_cred(struct cred *);
151155 extern int install_session_keyring_to_cred(struct cred *, struct key *);
152156 
153157 extern struct key *request_key_and_link(struct key_type *type,
154158 					const char *description,
159
+					struct key_tag *domain_tag,
155160 					const void *callout_info,
156161 					size_t callout_len,
157162 					void *aux,
....@@ -162,7 +167,6 @@
162167 				      const struct key_match_data *match_data);
163168 #define KEY_LOOKUP_CREATE	0x01
164169 #define KEY_LOOKUP_PARTIAL	0x02
165
-#define KEY_LOOKUP_FOR_UNLINK	0x04
166170 
167171 extern long join_session_keyring(const char *name);
168172 extern void key_change_session_keyring(struct callback_head *twork);
....@@ -178,14 +182,32 @@
178182 
179183 extern int key_task_permission(const key_ref_t key_ref,
180184 			       const struct cred *cred,
181
-			       key_perm_t perm);
185
+			       enum key_need_perm need_perm);
186
+
187
+static inline void notify_key(struct key *key,
188
+			      enum key_notification_subtype subtype, u32 aux)
189
+{
190
+#ifdef CONFIG_KEY_NOTIFICATIONS
191
+	struct key_notification n = {
192
+		.watch.type	= WATCH_TYPE_KEY_NOTIFY,
193
+		.watch.subtype	= subtype,
194
+		.watch.info	= watch_sizeof(n),
195
+		.key_id		= key_serial(key),
196
+		.aux		= aux,
197
+	};
198
+
199
+	post_watch_notification(key->watchers, &n.watch, current_cred(),
200
+				n.key_id);
201
+#endif
202
+}
182203 
183204 /*
184205  * Check to see whether permission is granted to use a key in the desired way.
185206  */
186
-static inline int key_permission(const key_ref_t key_ref, unsigned perm)
207
+static inline int key_permission(const key_ref_t key_ref,
208
+				 enum key_need_perm need_perm)
187209 {
188
-	return key_task_permission(key_ref, current_cred(), perm);
210
+	return key_task_permission(key_ref, current_cred(), need_perm);
189211 }
190212 
191213 extern struct key_type key_type_request_key_auth;
....@@ -205,7 +227,8 @@
205227 	return
206228 		key->flags & ((1 << KEY_FLAG_DEAD) |
207229 			      (1 << KEY_FLAG_INVALIDATED)) ||
208
-		(key->expiry > 0 && key->expiry <= limit);
230
+		(key->expiry > 0 && key->expiry <= limit) ||
231
+		key->domain_tag->removed;
209232 }
210233 
211234 /*
....@@ -217,6 +240,7 @@
217240 extern long keyctl_revoke_key(key_serial_t);
218241 extern long keyctl_keyring_clear(key_serial_t);
219242 extern long keyctl_keyring_link(key_serial_t, key_serial_t);
243
+extern long keyctl_keyring_move(key_serial_t, key_serial_t, key_serial_t, unsigned int);
220244 extern long keyctl_keyring_unlink(key_serial_t, key_serial_t);
221245 extern long keyctl_describe_key(key_serial_t, char __user *, size_t);
222246 extern long keyctl_keyring_search(key_serial_t, const char __user *,
....@@ -238,11 +262,6 @@
238262 				       const struct iovec __user *,
239263 				       unsigned, key_serial_t);
240264 extern long keyctl_invalidate_key(key_serial_t);
241
-
242
-struct iov_iter;
243
-extern long keyctl_instantiate_key_common(key_serial_t,
244
-					  struct iov_iter *,
245
-					  key_serial_t);
246265 extern long keyctl_restrict_keyring(key_serial_t id,
247266 				    const char __user *_type,
248267 				    const char __user *_restriction);
....@@ -261,7 +280,7 @@
261280 			      size_t, struct keyctl_kdf_params __user *);
262281 extern long __keyctl_dh_compute(struct keyctl_dh_params __user *, char __user *,
263282 				size_t, struct keyctl_kdf_params *);
264
-#ifdef CONFIG_KEYS_COMPAT
283
+#ifdef CONFIG_COMPAT
265284 extern long compat_keyctl_dh_compute(struct keyctl_dh_params __user *params,
266285 				char __user *buffer, size_t buflen,
267286 				struct compat_keyctl_kdf_params __user *kdf);
....@@ -276,7 +295,7 @@
276295 	return -EOPNOTSUPP;
277296 }
278297 
279
-#ifdef CONFIG_KEYS_COMPAT
298
+#ifdef CONFIG_COMPAT
280299 static inline long compat_keyctl_dh_compute(
281300 				struct keyctl_dh_params __user *params,
282301 				char __user *buffer, size_t buflen,
....@@ -287,6 +306,56 @@
287306 #endif
288307 #endif
289308 
309
+#ifdef CONFIG_ASYMMETRIC_KEY_TYPE
310
+extern long keyctl_pkey_query(key_serial_t,
311
+			      const char __user *,
312
+			      struct keyctl_pkey_query __user *);
313
+
314
+extern long keyctl_pkey_verify(const struct keyctl_pkey_params __user *,
315
+			       const char __user *,
316
+			       const void __user *, const void __user *);
317
+
318
+extern long keyctl_pkey_e_d_s(int,
319
+			      const struct keyctl_pkey_params __user *,
320
+			      const char __user *,
321
+			      const void __user *, void __user *);
322
+#else
323
+static inline long keyctl_pkey_query(key_serial_t id,
324
+				     const char __user *_info,
325
+				     struct keyctl_pkey_query __user *_res)
326
+{
327
+	return -EOPNOTSUPP;
328
+}
329
+
330
+static inline long keyctl_pkey_verify(const struct keyctl_pkey_params __user *params,
331
+				      const char __user *_info,
332
+				      const void __user *_in,
333
+				      const void __user *_in2)
334
+{
335
+	return -EOPNOTSUPP;
336
+}
337
+
338
+static inline long keyctl_pkey_e_d_s(int op,
339
+				     const struct keyctl_pkey_params __user *params,
340
+				     const char __user *_info,
341
+				     const void __user *_in,
342
+				     void __user *_out)
343
+{
344
+	return -EOPNOTSUPP;
345
+}
346
+#endif
347
+
348
+extern long keyctl_capabilities(unsigned char __user *_buffer, size_t buflen);
349
+
350
+#ifdef CONFIG_KEY_NOTIFICATIONS
351
+extern long keyctl_watch_key(key_serial_t, int, int);
352
+#else
353
+static inline long keyctl_watch_key(key_serial_t key_id, int watch_fd, int watch_id)
354
+{
355
+	return -EOPNOTSUPP;
356
+}
357
+#endif
358
+
290359 /*
291360  * Debugging key validation
292361  */