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git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blob - security/selinux/ss/policydb.h
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 struct ebitmap dominates
; /* set of roles dominated by this role */
65 struct ebitmap types
; /* set of authorized types for role */
69 u32 role
; /* current role */
70 u32 type
; /* program executable type */
71 u32 new_role
; /* new role */
72 struct role_trans
*next
;
76 u32 role
; /* current role */
77 u32 new_role
; /* new role */
78 struct role_allow
*next
;
83 u32 value
; /* internal type value */
84 unsigned char primary
; /* primary name? */
89 u32 value
; /* internal user value */
90 struct ebitmap roles
; /* set of authorized roles for user */
91 struct mls_range range
; /* MLS range (min - max) for user */
92 struct mls_level dfltlevel
; /* default login MLS level for user */
96 /* Sensitivity attributes */
98 struct mls_level
*level
; /* sensitivity and associated categories */
99 unsigned char isalias
; /* is this sensitivity an alias for another? */
102 /* Category attributes */
104 u32 value
; /* internal category bit + 1 */
105 unsigned char isalias
; /* is this category an alias for another? */
112 struct mls_range target_range
;
113 struct range_trans
*next
;
116 /* Boolean data type */
117 struct cond_bool_datum
{
118 __u32 value
; /* internal type value */
125 * The configuration data includes security contexts for
126 * initial SIDs, unlabeled file systems, TCP and UDP port numbers,
127 * network interfaces, and nodes. This structure stores the
128 * relevant data for one such entry. Entries of the same kind
129 * (e.g. all initial SIDs) are linked together into a list.
133 char *name
; /* name of initial SID, fs, netif, fstype, path */
138 } port
; /* TCP or UDP port information */
142 } node
; /* node information */
146 } node6
; /* IPv6 node information */
149 u32 sclass
; /* security class for genfs */
150 u32 behavior
; /* labeling behavior for fs_use */
152 struct context context
[2]; /* security context(s) */
153 u32 sid
[2]; /* SID(s) */
154 struct ocontext
*next
;
159 struct ocontext
*head
;
163 /* symbol table array indices */
164 #define SYM_COMMONS 0
165 #define SYM_CLASSES 1
174 /* object context array indices */
175 #define OCON_ISID 0 /* initial SIDs */
176 #define OCON_FS 1 /* unlabeled file systems */
177 #define OCON_PORT 2 /* TCP and UDP port numbers */
178 #define OCON_NETIF 3 /* network interfaces */
179 #define OCON_NODE 4 /* nodes */
180 #define OCON_FSUSE 5 /* fs_use */
181 #define OCON_NODE6 6 /* IPv6 nodes */
184 /* The policy database */
187 struct symtab symtab
[SYM_NUM
];
188 #define p_commons symtab[SYM_COMMONS]
189 #define p_classes symtab[SYM_CLASSES]
190 #define p_roles symtab[SYM_ROLES]
191 #define p_types symtab[SYM_TYPES]
192 #define p_users symtab[SYM_USERS]
193 #define p_bools symtab[SYM_BOOLS]
194 #define p_levels symtab[SYM_LEVELS]
195 #define p_cats symtab[SYM_CATS]
197 /* symbol names indexed by (value - 1) */
198 char **sym_val_to_name
[SYM_NUM
];
199 #define p_common_val_to_name sym_val_to_name[SYM_COMMONS]
200 #define p_class_val_to_name sym_val_to_name[SYM_CLASSES]
201 #define p_role_val_to_name sym_val_to_name[SYM_ROLES]
202 #define p_type_val_to_name sym_val_to_name[SYM_TYPES]
203 #define p_user_val_to_name sym_val_to_name[SYM_USERS]
204 #define p_bool_val_to_name sym_val_to_name[SYM_BOOLS]
205 #define p_sens_val_to_name sym_val_to_name[SYM_LEVELS]
206 #define p_cat_val_to_name sym_val_to_name[SYM_CATS]
208 /* class, role, and user attributes indexed by (value - 1) */
209 struct class_datum
**class_val_to_struct
;
210 struct role_datum
**role_val_to_struct
;
211 struct user_datum
**user_val_to_struct
;
213 /* type enforcement access vectors and transitions */
214 struct avtab te_avtab
;
216 /* role transitions */
217 struct role_trans
*role_tr
;
219 /* bools indexed by (value - 1) */
220 struct cond_bool_datum
**bool_val_to_struct
;
221 /* type enforcement conditional access vectors and transitions */
222 struct avtab te_cond_avtab
;
223 /* linked list indexing te_cond_avtab by conditional */
224 struct cond_node
* cond_list
;
227 struct role_allow
*role_allow
;
229 /* security contexts of initial SIDs, unlabeled file systems,
230 TCP or UDP port numbers, network interfaces and nodes */
231 struct ocontext
*ocontexts
[OCON_NUM
];
233 /* security contexts for files in filesystems that cannot support
234 a persistent label mapping or use another
235 fixed labeling behavior. */
238 /* range transitions */
239 struct range_trans
*range_tr
;
241 /* type -> attribute reverse mapping */
242 struct ebitmap
*type_attr_map
;
244 unsigned int policyvers
;
246 unsigned int reject_unknown
: 1;
247 unsigned int allow_unknown
: 1;
248 u32
*undefined_perms
;
251 extern void policydb_destroy(struct policydb
*p
);
252 extern int policydb_load_isids(struct policydb
*p
, struct sidtab
*s
);
253 extern int policydb_context_isvalid(struct policydb
*p
, struct context
*c
);
254 extern int policydb_class_isvalid(struct policydb
*p
, unsigned int class);
255 extern int policydb_type_isvalid(struct policydb
*p
, unsigned int type
);
256 extern int policydb_role_isvalid(struct policydb
*p
, unsigned int role
);
257 extern int policydb_read(struct policydb
*p
, void *fp
);
259 #define PERM_SYMTAB_SIZE 32
261 #define POLICYDB_CONFIG_MLS 1
263 /* the config flags related to unknown classes/perms are bits 2 and 3 */
264 #define REJECT_UNKNOWN 0x00000002
265 #define ALLOW_UNKNOWN 0x00000004
267 #define OBJECT_R "object_r"
268 #define OBJECT_R_VAL 1
270 #define POLICYDB_MAGIC SELINUX_MAGIC
271 #define POLICYDB_STRING "SE Linux"
278 static inline int next_entry(void *buf
, struct policy_file
*fp
, size_t bytes
)
283 memcpy(buf
, fp
->data
, bytes
);
289 #endif /* _SS_POLICYDB_H_ */