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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * A policy database (policydb) specifies the
4 * configuration data for the security policy.
5 *
6 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
7 */
8
9/*
10 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
11 *
12 * Support for enhanced MLS infrastructure.
13 *
14 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
15 *
16 * Added conditional policy language extensions
17 *
18 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
19 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
20 */
21
22#ifndef _SS_POLICYDB_H_
23#define _SS_POLICYDB_H_
24
25#include "symtab.h"
26#include "avtab.h"
27#include "sidtab.h"
28#include "ebitmap.h"
29#include "mls_types.h"
30#include "context.h"
31#include "constraint.h"
32
33/*
34 * A datum type is defined for each kind of symbol
35 * in the configuration data: individual permissions,
36 * common prefixes for access vectors, classes,
37 * users, roles, types, sensitivities, categories, etc.
38 */
39
40/* Permission attributes */
41struct perm_datum {
42 u32 value; /* permission bit + 1 */
43};
44
45/* Attributes of a common prefix for access vectors */
46struct common_datum {
47 u32 value; /* internal common value */
48 struct symtab permissions; /* common permissions */
49};
50
51/* Class attributes */
52struct class_datum {
53 u32 value; /* class value */
54 char *comkey; /* common name */
55 struct common_datum *comdatum; /* common datum */
56 struct symtab permissions; /* class-specific permission symbol table */
57 struct constraint_node *constraints; /* constraints on class permissions */
58 struct constraint_node *validatetrans; /* special transition rules */
59/* Options how a new object user, role, and type should be decided */
60#define DEFAULT_SOURCE 1
61#define DEFAULT_TARGET 2
62 char default_user;
63 char default_role;
64 char default_type;
65/* Options how a new object range should be decided */
66#define DEFAULT_SOURCE_LOW 1
67#define DEFAULT_SOURCE_HIGH 2
68#define DEFAULT_SOURCE_LOW_HIGH 3
69#define DEFAULT_TARGET_LOW 4
70#define DEFAULT_TARGET_HIGH 5
71#define DEFAULT_TARGET_LOW_HIGH 6
72 char default_range;
73};
74
75/* Role attributes */
76struct role_datum {
77 u32 value; /* internal role value */
78 u32 bounds; /* boundary of role */
79 struct ebitmap dominates; /* set of roles dominated by this role */
80 struct ebitmap types; /* set of authorized types for role */
81};
82
83struct role_trans {
84 u32 role; /* current role */
85 u32 type; /* program executable type, or new object type */
86 u32 tclass; /* process class, or new object class */
87 u32 new_role; /* new role */
88 struct role_trans *next;
89};
90
91struct filename_trans {
92 u32 stype; /* current process */
93 u32 ttype; /* parent dir context */
94 u16 tclass; /* class of new object */
95 const char *name; /* last path component */
96};
97
98struct filename_trans_datum {
99 u32 otype; /* expected of new object */
100};
101
102struct role_allow {
103 u32 role; /* current role */
104 u32 new_role; /* new role */
105 struct role_allow *next;
106};
107
108/* Type attributes */
109struct type_datum {
110 u32 value; /* internal type value */
111 u32 bounds; /* boundary of type */
112 unsigned char primary; /* primary name? */
113 unsigned char attribute;/* attribute ?*/
114};
115
116/* User attributes */
117struct user_datum {
118 u32 value; /* internal user value */
119 u32 bounds; /* bounds of user */
120 struct ebitmap roles; /* set of authorized roles for user */
121 struct mls_range range; /* MLS range (min - max) for user */
122 struct mls_level dfltlevel; /* default login MLS level for user */
123};
124
125
126/* Sensitivity attributes */
127struct level_datum {
128 struct mls_level *level; /* sensitivity and associated categories */
129 unsigned char isalias; /* is this sensitivity an alias for another? */
130};
131
132/* Category attributes */
133struct cat_datum {
134 u32 value; /* internal category bit + 1 */
135 unsigned char isalias; /* is this category an alias for another? */
136};
137
138struct range_trans {
139 u32 source_type;
140 u32 target_type;
141 u32 target_class;
142};
143
144/* Boolean data type */
145struct cond_bool_datum {
146 __u32 value; /* internal type value */
147 int state;
148};
149
150struct cond_node;
151
152/*
153 * type set preserves data needed to determine constraint info from
154 * policy source. This is not used by the kernel policy but allows
155 * utilities such as audit2allow to determine constraint denials.
156 */
157struct type_set {
158 struct ebitmap types;
159 struct ebitmap negset;
160 u32 flags;
161};
162
163/*
164 * The configuration data includes security contexts for
165 * initial SIDs, unlabeled file systems, TCP and UDP port numbers,
166 * network interfaces, and nodes. This structure stores the
167 * relevant data for one such entry. Entries of the same kind
168 * (e.g. all initial SIDs) are linked together into a list.
169 */
170struct ocontext {
171 union {
172 char *name; /* name of initial SID, fs, netif, fstype, path */
173 struct {
174 u8 protocol;
175 u16 low_port;
176 u16 high_port;
177 } port; /* TCP or UDP port information */
178 struct {
179 u32 addr;
180 u32 mask;
181 } node; /* node information */
182 struct {
183 u32 addr[4];
184 u32 mask[4];
185 } node6; /* IPv6 node information */
186 struct {
187 u64 subnet_prefix;
188 u16 low_pkey;
189 u16 high_pkey;
190 } ibpkey;
191 struct {
192 char *dev_name;
193 u8 port;
194 } ibendport;
195 } u;
196 union {
197 u32 sclass; /* security class for genfs */
198 u32 behavior; /* labeling behavior for fs_use */
199 } v;
200 struct context context[2]; /* security context(s) */
201 u32 sid[2]; /* SID(s) */
202 struct ocontext *next;
203};
204
205struct genfs {
206 char *fstype;
207 struct ocontext *head;
208 struct genfs *next;
209};
210
211/* symbol table array indices */
212#define SYM_COMMONS 0
213#define SYM_CLASSES 1
214#define SYM_ROLES 2
215#define SYM_TYPES 3
216#define SYM_USERS 4
217#define SYM_BOOLS 5
218#define SYM_LEVELS 6
219#define SYM_CATS 7
220#define SYM_NUM 8
221
222/* object context array indices */
223#define OCON_ISID 0 /* initial SIDs */
224#define OCON_FS 1 /* unlabeled file systems */
225#define OCON_PORT 2 /* TCP and UDP port numbers */
226#define OCON_NETIF 3 /* network interfaces */
227#define OCON_NODE 4 /* nodes */
228#define OCON_FSUSE 5 /* fs_use */
229#define OCON_NODE6 6 /* IPv6 nodes */
230#define OCON_IBPKEY 7 /* Infiniband PKeys */
231#define OCON_IBENDPORT 8 /* Infiniband end ports */
232#define OCON_NUM 9
233
234/* The policy database */
235struct policydb {
236 int mls_enabled;
237
238 /* symbol tables */
239 struct symtab symtab[SYM_NUM];
240#define p_commons symtab[SYM_COMMONS]
241#define p_classes symtab[SYM_CLASSES]
242#define p_roles symtab[SYM_ROLES]
243#define p_types symtab[SYM_TYPES]
244#define p_users symtab[SYM_USERS]
245#define p_bools symtab[SYM_BOOLS]
246#define p_levels symtab[SYM_LEVELS]
247#define p_cats symtab[SYM_CATS]
248
249 /* symbol names indexed by (value - 1) */
250 char **sym_val_to_name[SYM_NUM];
251
252 /* class, role, and user attributes indexed by (value - 1) */
253 struct class_datum **class_val_to_struct;
254 struct role_datum **role_val_to_struct;
255 struct user_datum **user_val_to_struct;
256 struct type_datum **type_val_to_struct;
257
258 /* type enforcement access vectors and transitions */
259 struct avtab te_avtab;
260
261 /* role transitions */
262 struct role_trans *role_tr;
263
264 /* file transitions with the last path component */
265 /* quickly exclude lookups when parent ttype has no rules */
266 struct ebitmap filename_trans_ttypes;
267 /* actual set of filename_trans rules */
268 struct hashtab *filename_trans;
269
270 /* bools indexed by (value - 1) */
271 struct cond_bool_datum **bool_val_to_struct;
272 /* type enforcement conditional access vectors and transitions */
273 struct avtab te_cond_avtab;
274 /* linked list indexing te_cond_avtab by conditional */
275 struct cond_node *cond_list;
276
277 /* role allows */
278 struct role_allow *role_allow;
279
280 /* security contexts of initial SIDs, unlabeled file systems,
281 TCP or UDP port numbers, network interfaces and nodes */
282 struct ocontext *ocontexts[OCON_NUM];
283
284 /* security contexts for files in filesystems that cannot support
285 a persistent label mapping or use another
286 fixed labeling behavior. */
287 struct genfs *genfs;
288
289 /* range transitions table (range_trans_key -> mls_range) */
290 struct hashtab *range_tr;
291
292 /* type -> attribute reverse mapping */
293 struct ebitmap *type_attr_map_array;
294
295 struct ebitmap policycaps;
296
297 struct ebitmap permissive_map;
298
299 /* length of this policy when it was loaded */
300 size_t len;
301
302 unsigned int policyvers;
303
304 unsigned int reject_unknown : 1;
305 unsigned int allow_unknown : 1;
306
307 u16 process_class;
308 u32 process_trans_perms;
309};
310
311extern void policydb_destroy(struct policydb *p);
312extern int policydb_load_isids(struct policydb *p, struct sidtab *s);
313extern int policydb_context_isvalid(struct policydb *p, struct context *c);
314extern int policydb_class_isvalid(struct policydb *p, unsigned int class);
315extern int policydb_type_isvalid(struct policydb *p, unsigned int type);
316extern int policydb_role_isvalid(struct policydb *p, unsigned int role);
317extern int policydb_read(struct policydb *p, void *fp);
318extern int policydb_write(struct policydb *p, void *fp);
319
320#define PERM_SYMTAB_SIZE 32
321
322#define POLICYDB_CONFIG_MLS 1
323
324/* the config flags related to unknown classes/perms are bits 2 and 3 */
325#define REJECT_UNKNOWN 0x00000002
326#define ALLOW_UNKNOWN 0x00000004
327
328#define OBJECT_R "object_r"
329#define OBJECT_R_VAL 1
330
331#define POLICYDB_MAGIC SELINUX_MAGIC
332#define POLICYDB_STRING "SE Linux"
333
334struct policy_file {
335 char *data;
336 size_t len;
337};
338
339struct policy_data {
340 struct policydb *p;
341 void *fp;
342};
343
344static inline int next_entry(void *buf, struct policy_file *fp, size_t bytes)
345{
346 if (bytes > fp->len)
347 return -EINVAL;
348
349 memcpy(buf, fp->data, bytes);
350 fp->data += bytes;
351 fp->len -= bytes;
352 return 0;
353}
354
355static inline int put_entry(const void *buf, size_t bytes, int num, struct policy_file *fp)
356{
357 size_t len = bytes * num;
358
359 memcpy(fp->data, buf, len);
360 fp->data += len;
361 fp->len -= len;
362
363 return 0;
364}
365
366static inline char *sym_name(struct policydb *p, unsigned int sym_num, unsigned int element_nr)
367{
368 return p->sym_val_to_name[sym_num][element_nr];
369}
370
371extern u16 string_to_security_class(struct policydb *p, const char *name);
372extern u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name);
373
374#endif /* _SS_POLICYDB_H_ */
375
1/*
2 * A policy database (policydb) specifies the
3 * configuration data for the security policy.
4 *
5 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
6 */
7
8/*
9 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
10 *
11 * Support for enhanced MLS infrastructure.
12 *
13 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
14 *
15 * Added conditional policy language extensions
16 *
17 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
18 * Copyright (C) 2003 - 2004 Tresys Technology, LLC
19 * This program is free software; you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation, version 2.
22 */
23
24#ifndef _SS_POLICYDB_H_
25#define _SS_POLICYDB_H_
26
27#include <linux/flex_array.h>
28
29#include "symtab.h"
30#include "avtab.h"
31#include "sidtab.h"
32#include "ebitmap.h"
33#include "mls_types.h"
34#include "context.h"
35#include "constraint.h"
36
37/*
38 * A datum type is defined for each kind of symbol
39 * in the configuration data: individual permissions,
40 * common prefixes for access vectors, classes,
41 * users, roles, types, sensitivities, categories, etc.
42 */
43
44/* Permission attributes */
45struct perm_datum {
46 u32 value; /* permission bit + 1 */
47};
48
49/* Attributes of a common prefix for access vectors */
50struct common_datum {
51 u32 value; /* internal common value */
52 struct symtab permissions; /* common permissions */
53};
54
55/* Class attributes */
56struct class_datum {
57 u32 value; /* class value */
58 char *comkey; /* common name */
59 struct common_datum *comdatum; /* common datum */
60 struct symtab permissions; /* class-specific permission symbol table */
61 struct constraint_node *constraints; /* constraints on class permissions */
62 struct constraint_node *validatetrans; /* special transition rules */
63};
64
65/* Role attributes */
66struct role_datum {
67 u32 value; /* internal role value */
68 u32 bounds; /* boundary of role */
69 struct ebitmap dominates; /* set of roles dominated by this role */
70 struct ebitmap types; /* set of authorized types for role */
71};
72
73struct role_trans {
74 u32 role; /* current role */
75 u32 type; /* program executable type, or new object type */
76 u32 tclass; /* process class, or new object class */
77 u32 new_role; /* new role */
78 struct role_trans *next;
79};
80
81struct filename_trans {
82 u32 stype; /* current process */
83 u32 ttype; /* parent dir context */
84 u16 tclass; /* class of new object */
85 const char *name; /* last path component */
86};
87
88struct filename_trans_datum {
89 u32 otype; /* expected of new object */
90};
91
92struct role_allow {
93 u32 role; /* current role */
94 u32 new_role; /* new role */
95 struct role_allow *next;
96};
97
98/* Type attributes */
99struct type_datum {
100 u32 value; /* internal type value */
101 u32 bounds; /* boundary of type */
102 unsigned char primary; /* primary name? */
103 unsigned char attribute;/* attribute ?*/
104};
105
106/* User attributes */
107struct user_datum {
108 u32 value; /* internal user value */
109 u32 bounds; /* bounds of user */
110 struct ebitmap roles; /* set of authorized roles for user */
111 struct mls_range range; /* MLS range (min - max) for user */
112 struct mls_level dfltlevel; /* default login MLS level for user */
113};
114
115
116/* Sensitivity attributes */
117struct level_datum {
118 struct mls_level *level; /* sensitivity and associated categories */
119 unsigned char isalias; /* is this sensitivity an alias for another? */
120};
121
122/* Category attributes */
123struct cat_datum {
124 u32 value; /* internal category bit + 1 */
125 unsigned char isalias; /* is this category an alias for another? */
126};
127
128struct range_trans {
129 u32 source_type;
130 u32 target_type;
131 u32 target_class;
132};
133
134/* Boolean data type */
135struct cond_bool_datum {
136 __u32 value; /* internal type value */
137 int state;
138};
139
140struct cond_node;
141
142/*
143 * The configuration data includes security contexts for
144 * initial SIDs, unlabeled file systems, TCP and UDP port numbers,
145 * network interfaces, and nodes. This structure stores the
146 * relevant data for one such entry. Entries of the same kind
147 * (e.g. all initial SIDs) are linked together into a list.
148 */
149struct ocontext {
150 union {
151 char *name; /* name of initial SID, fs, netif, fstype, path */
152 struct {
153 u8 protocol;
154 u16 low_port;
155 u16 high_port;
156 } port; /* TCP or UDP port information */
157 struct {
158 u32 addr;
159 u32 mask;
160 } node; /* node information */
161 struct {
162 u32 addr[4];
163 u32 mask[4];
164 } node6; /* IPv6 node information */
165 } u;
166 union {
167 u32 sclass; /* security class for genfs */
168 u32 behavior; /* labeling behavior for fs_use */
169 } v;
170 struct context context[2]; /* security context(s) */
171 u32 sid[2]; /* SID(s) */
172 struct ocontext *next;
173};
174
175struct genfs {
176 char *fstype;
177 struct ocontext *head;
178 struct genfs *next;
179};
180
181/* symbol table array indices */
182#define SYM_COMMONS 0
183#define SYM_CLASSES 1
184#define SYM_ROLES 2
185#define SYM_TYPES 3
186#define SYM_USERS 4
187#define SYM_BOOLS 5
188#define SYM_LEVELS 6
189#define SYM_CATS 7
190#define SYM_NUM 8
191
192/* object context array indices */
193#define OCON_ISID 0 /* initial SIDs */
194#define OCON_FS 1 /* unlabeled file systems */
195#define OCON_PORT 2 /* TCP and UDP port numbers */
196#define OCON_NETIF 3 /* network interfaces */
197#define OCON_NODE 4 /* nodes */
198#define OCON_FSUSE 5 /* fs_use */
199#define OCON_NODE6 6 /* IPv6 nodes */
200#define OCON_NUM 7
201
202/* The policy database */
203struct policydb {
204 int mls_enabled;
205
206 /* symbol tables */
207 struct symtab symtab[SYM_NUM];
208#define p_commons symtab[SYM_COMMONS]
209#define p_classes symtab[SYM_CLASSES]
210#define p_roles symtab[SYM_ROLES]
211#define p_types symtab[SYM_TYPES]
212#define p_users symtab[SYM_USERS]
213#define p_bools symtab[SYM_BOOLS]
214#define p_levels symtab[SYM_LEVELS]
215#define p_cats symtab[SYM_CATS]
216
217 /* symbol names indexed by (value - 1) */
218 struct flex_array *sym_val_to_name[SYM_NUM];
219
220 /* class, role, and user attributes indexed by (value - 1) */
221 struct class_datum **class_val_to_struct;
222 struct role_datum **role_val_to_struct;
223 struct user_datum **user_val_to_struct;
224 struct flex_array *type_val_to_struct_array;
225
226 /* type enforcement access vectors and transitions */
227 struct avtab te_avtab;
228
229 /* role transitions */
230 struct role_trans *role_tr;
231
232 /* file transitions with the last path component */
233 /* quickly exclude lookups when parent ttype has no rules */
234 struct ebitmap filename_trans_ttypes;
235 /* actual set of filename_trans rules */
236 struct hashtab *filename_trans;
237
238 /* bools indexed by (value - 1) */
239 struct cond_bool_datum **bool_val_to_struct;
240 /* type enforcement conditional access vectors and transitions */
241 struct avtab te_cond_avtab;
242 /* linked list indexing te_cond_avtab by conditional */
243 struct cond_node *cond_list;
244
245 /* role allows */
246 struct role_allow *role_allow;
247
248 /* security contexts of initial SIDs, unlabeled file systems,
249 TCP or UDP port numbers, network interfaces and nodes */
250 struct ocontext *ocontexts[OCON_NUM];
251
252 /* security contexts for files in filesystems that cannot support
253 a persistent label mapping or use another
254 fixed labeling behavior. */
255 struct genfs *genfs;
256
257 /* range transitions table (range_trans_key -> mls_range) */
258 struct hashtab *range_tr;
259
260 /* type -> attribute reverse mapping */
261 struct flex_array *type_attr_map_array;
262
263 struct ebitmap policycaps;
264
265 struct ebitmap permissive_map;
266
267 /* length of this policy when it was loaded */
268 size_t len;
269
270 unsigned int policyvers;
271
272 unsigned int reject_unknown : 1;
273 unsigned int allow_unknown : 1;
274
275 u16 process_class;
276 u32 process_trans_perms;
277};
278
279extern void policydb_destroy(struct policydb *p);
280extern int policydb_load_isids(struct policydb *p, struct sidtab *s);
281extern int policydb_context_isvalid(struct policydb *p, struct context *c);
282extern int policydb_class_isvalid(struct policydb *p, unsigned int class);
283extern int policydb_type_isvalid(struct policydb *p, unsigned int type);
284extern int policydb_role_isvalid(struct policydb *p, unsigned int role);
285extern int policydb_read(struct policydb *p, void *fp);
286extern int policydb_write(struct policydb *p, void *fp);
287
288#define PERM_SYMTAB_SIZE 32
289
290#define POLICYDB_CONFIG_MLS 1
291
292/* the config flags related to unknown classes/perms are bits 2 and 3 */
293#define REJECT_UNKNOWN 0x00000002
294#define ALLOW_UNKNOWN 0x00000004
295
296#define OBJECT_R "object_r"
297#define OBJECT_R_VAL 1
298
299#define POLICYDB_MAGIC SELINUX_MAGIC
300#define POLICYDB_STRING "SE Linux"
301
302struct policy_file {
303 char *data;
304 size_t len;
305};
306
307struct policy_data {
308 struct policydb *p;
309 void *fp;
310};
311
312static inline int next_entry(void *buf, struct policy_file *fp, size_t bytes)
313{
314 if (bytes > fp->len)
315 return -EINVAL;
316
317 memcpy(buf, fp->data, bytes);
318 fp->data += bytes;
319 fp->len -= bytes;
320 return 0;
321}
322
323static inline int put_entry(const void *buf, size_t bytes, int num, struct policy_file *fp)
324{
325 size_t len = bytes * num;
326
327 memcpy(fp->data, buf, len);
328 fp->data += len;
329 fp->len -= len;
330
331 return 0;
332}
333
334static inline char *sym_name(struct policydb *p, unsigned int sym_num, unsigned int element_nr)
335{
336 struct flex_array *fa = p->sym_val_to_name[sym_num];
337
338 return flex_array_get_ptr(fa, element_nr);
339}
340
341extern u16 string_to_security_class(struct policydb *p, const char *name);
342extern u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name);
343
344#endif /* _SS_POLICYDB_H_ */
345