2 * A policy database (policydb) specifies the
3 * configuration data for the security policy.
5 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
9 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
11 * Support for enhanced MLS infrastructure.
13 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com>
15 * Added conditional policy language extensions
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.
24 #ifndef _SS_POLICYDB_H_
25 #define _SS_POLICYDB_H_
31 #include "constraint.h"
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.
40 /* Permission attributes */
42 u32 value; /* permission bit + 1 */
45 /* Attributes of a common prefix for access vectors */
47 u32 value; /* internal common value */
48 struct symtab permissions; /* common permissions */
51 /* Class attributes */
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 */
63 u32 value; /* internal role value */
64 u32 bounds; /* boundary of role */
65 struct ebitmap dominates; /* set of roles dominated by this role */
66 struct ebitmap types; /* set of authorized types for role */
70 u32 role; /* current role */
71 u32 type; /* program executable type */
72 u32 new_role; /* new role */
73 struct role_trans *next;
77 u32 role; /* current role */
78 u32 new_role; /* new role */
79 struct role_allow *next;
84 u32 value; /* internal type value */
85 u32 bounds; /* boundary of type */
86 unsigned char primary; /* primary name? */
87 unsigned char attribute;/* attribute ?*/
92 u32 value; /* internal user value */
93 u32 bounds; /* bounds of user */
94 struct ebitmap roles; /* set of authorized roles for user */
95 struct mls_range range; /* MLS range (min - max) for user */
96 struct mls_level dfltlevel; /* default login MLS level for user */
100 /* Sensitivity attributes */
102 struct mls_level *level; /* sensitivity and associated categories */
103 unsigned char isalias; /* is this sensitivity an alias for another? */
106 /* Category attributes */
108 u32 value; /* internal category bit + 1 */
109 unsigned char isalias; /* is this category an alias for another? */
118 /* Boolean data type */
119 struct cond_bool_datum {
120 __u32 value; /* internal type value */
127 * The configuration data includes security contexts for
128 * initial SIDs, unlabeled file systems, TCP and UDP port numbers,
129 * network interfaces, and nodes. This structure stores the
130 * relevant data for one such entry. Entries of the same kind
131 * (e.g. all initial SIDs) are linked together into a list.
135 char *name; /* name of initial SID, fs, netif, fstype, path */
140 } port; /* TCP or UDP port information */
144 } node; /* node information */
148 } node6; /* IPv6 node information */
151 u32 sclass; /* security class for genfs */
152 u32 behavior; /* labeling behavior for fs_use */
154 struct context context[2]; /* security context(s) */
155 u32 sid[2]; /* SID(s) */
156 struct ocontext *next;
161 struct ocontext *head;
165 /* symbol table array indices */
166 #define SYM_COMMONS 0
167 #define SYM_CLASSES 1
176 /* object context array indices */
177 #define OCON_ISID 0 /* initial SIDs */
178 #define OCON_FS 1 /* unlabeled file systems */
179 #define OCON_PORT 2 /* TCP and UDP port numbers */
180 #define OCON_NETIF 3 /* network interfaces */
181 #define OCON_NODE 4 /* nodes */
182 #define OCON_FSUSE 5 /* fs_use */
183 #define OCON_NODE6 6 /* IPv6 nodes */
186 /* The policy database */
189 struct symtab symtab[SYM_NUM];
190 #define p_commons symtab[SYM_COMMONS]
191 #define p_classes symtab[SYM_CLASSES]
192 #define p_roles symtab[SYM_ROLES]
193 #define p_types symtab[SYM_TYPES]
194 #define p_users symtab[SYM_USERS]
195 #define p_bools symtab[SYM_BOOLS]
196 #define p_levels symtab[SYM_LEVELS]
197 #define p_cats symtab[SYM_CATS]
199 /* symbol names indexed by (value - 1) */
200 char **sym_val_to_name[SYM_NUM];
201 #define p_common_val_to_name sym_val_to_name[SYM_COMMONS]
202 #define p_class_val_to_name sym_val_to_name[SYM_CLASSES]
203 #define p_role_val_to_name sym_val_to_name[SYM_ROLES]
204 #define p_type_val_to_name sym_val_to_name[SYM_TYPES]
205 #define p_user_val_to_name sym_val_to_name[SYM_USERS]
206 #define p_bool_val_to_name sym_val_to_name[SYM_BOOLS]
207 #define p_sens_val_to_name sym_val_to_name[SYM_LEVELS]
208 #define p_cat_val_to_name sym_val_to_name[SYM_CATS]
210 /* class, role, and user attributes indexed by (value - 1) */
211 struct class_datum **class_val_to_struct;
212 struct role_datum **role_val_to_struct;
213 struct user_datum **user_val_to_struct;
214 struct type_datum **type_val_to_struct;
216 /* type enforcement access vectors and transitions */
217 struct avtab te_avtab;
219 /* role transitions */
220 struct role_trans *role_tr;
222 /* bools indexed by (value - 1) */
223 struct cond_bool_datum **bool_val_to_struct;
224 /* type enforcement conditional access vectors and transitions */
225 struct avtab te_cond_avtab;
226 /* linked list indexing te_cond_avtab by conditional */
227 struct cond_node *cond_list;
230 struct role_allow *role_allow;
232 /* security contexts of initial SIDs, unlabeled file systems,
233 TCP or UDP port numbers, network interfaces and nodes */
234 struct ocontext *ocontexts[OCON_NUM];
236 /* security contexts for files in filesystems that cannot support
237 a persistent label mapping or use another
238 fixed labeling behavior. */
241 /* range transitions table (range_trans_key -> mls_range) */
242 struct hashtab *range_tr;
244 /* type -> attribute reverse mapping */
245 struct ebitmap *type_attr_map;
247 struct ebitmap policycaps;
249 struct ebitmap permissive_map;
251 unsigned int policyvers;
253 unsigned int reject_unknown : 1;
254 unsigned int allow_unknown : 1;
257 u32 process_trans_perms;
260 extern void policydb_destroy(struct policydb *p);
261 extern int policydb_load_isids(struct policydb *p, struct sidtab *s);
262 extern int policydb_context_isvalid(struct policydb *p, struct context *c);
263 extern int policydb_class_isvalid(struct policydb *p, unsigned int class);
264 extern int policydb_type_isvalid(struct policydb *p, unsigned int type);
265 extern int policydb_role_isvalid(struct policydb *p, unsigned int role);
266 extern int policydb_read(struct policydb *p, void *fp);
268 #define PERM_SYMTAB_SIZE 32
270 #define POLICYDB_CONFIG_MLS 1
272 /* the config flags related to unknown classes/perms are bits 2 and 3 */
273 #define REJECT_UNKNOWN 0x00000002
274 #define ALLOW_UNKNOWN 0x00000004
276 #define OBJECT_R "object_r"
277 #define OBJECT_R_VAL 1
279 #define POLICYDB_MAGIC SELINUX_MAGIC
280 #define POLICYDB_STRING "SE Linux"
287 static inline int next_entry(void *buf, struct policy_file *fp, size_t bytes)
292 memcpy(buf, fp->data, bytes);
298 extern u16 string_to_security_class(struct policydb *p, const char *name);
299 extern u32 string_to_av_perm(struct policydb *p, u16 tclass, const char *name);
301 #endif /* _SS_POLICYDB_H_ */