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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 *
4 * mdp - make dummy policy
5 *
6 * When pointed at a kernel tree, builds a dummy policy for that kernel
7 * with exactly one type with full rights to itself.
8 *
9 * Copyright (C) IBM Corporation, 2006
10 *
11 * Authors: Serge E. Hallyn <serue@us.ibm.com>
12 */
13
14
15/* NOTE: we really do want to use the kernel headers here */
16#define __EXPORTED_HEADERS__
17
18#include <stdio.h>
19#include <stdlib.h>
20#include <unistd.h>
21#include <string.h>
22#include <linux/kconfig.h>
23
24static void usage(char *name)
25{
26 printf("usage: %s [-m] policy_file context_file\n", name);
27 exit(1);
28}
29
30/* Class/perm mapping support */
31struct security_class_mapping {
32 const char *name;
33 const char *perms[sizeof(unsigned) * 8 + 1];
34};
35
36#include "classmap.h"
37#include "initial_sid_to_string.h"
38
39int main(int argc, char *argv[])
40{
41 int i, j, mls = 0;
42 int initial_sid_to_string_len;
43 char **arg, *polout, *ctxout;
44
45 FILE *fout;
46
47 if (argc < 3)
48 usage(argv[0]);
49 arg = argv+1;
50 if (argc==4 && strcmp(argv[1], "-m") == 0) {
51 mls = 1;
52 arg++;
53 }
54 polout = *arg++;
55 ctxout = *arg;
56
57 fout = fopen(polout, "w");
58 if (!fout) {
59 printf("Could not open %s for writing\n", polout);
60 usage(argv[0]);
61 }
62
63 /* print out the classes */
64 for (i = 0; secclass_map[i].name; i++)
65 fprintf(fout, "class %s\n", secclass_map[i].name);
66 fprintf(fout, "\n");
67
68 initial_sid_to_string_len = sizeof(initial_sid_to_string) / sizeof (char *);
69 /* print out the sids */
70 for (i = 1; i < initial_sid_to_string_len; i++)
71 fprintf(fout, "sid %s\n", initial_sid_to_string[i]);
72 fprintf(fout, "\n");
73
74 /* print out the class permissions */
75 for (i = 0; secclass_map[i].name; i++) {
76 struct security_class_mapping *map = &secclass_map[i];
77 fprintf(fout, "class %s\n", map->name);
78 fprintf(fout, "{\n");
79 for (j = 0; map->perms[j]; j++)
80 fprintf(fout, "\t%s\n", map->perms[j]);
81 fprintf(fout, "}\n\n");
82 }
83 fprintf(fout, "\n");
84
85 /* print out mls declarations and constraints */
86 if (mls) {
87 fprintf(fout, "sensitivity s0;\n");
88 fprintf(fout, "sensitivity s1;\n");
89 fprintf(fout, "dominance { s0 s1 }\n");
90 fprintf(fout, "category c0;\n");
91 fprintf(fout, "category c1;\n");
92 fprintf(fout, "level s0:c0.c1;\n");
93 fprintf(fout, "level s1:c0.c1;\n");
94#define SYSTEMLOW "s0"
95#define SYSTEMHIGH "s1:c0.c1"
96 for (i = 0; secclass_map[i].name; i++) {
97 struct security_class_mapping *map = &secclass_map[i];
98
99 fprintf(fout, "mlsconstrain %s {\n", map->name);
100 for (j = 0; map->perms[j]; j++)
101 fprintf(fout, "\t%s\n", map->perms[j]);
102 /*
103 * This requires all subjects and objects to be
104 * single-level (l2 eq h2), and that the subject
105 * level dominate the object level (h1 dom h2)
106 * in order to have any permissions to it.
107 */
108 fprintf(fout, "} (l2 eq h2 and h1 dom h2);\n\n");
109 }
110 }
111
112 /* types, roles, and allows */
113 fprintf(fout, "type base_t;\n");
114 fprintf(fout, "role base_r;\n");
115 fprintf(fout, "role base_r types { base_t };\n");
116 for (i = 0; secclass_map[i].name; i++)
117 fprintf(fout, "allow base_t base_t:%s *;\n",
118 secclass_map[i].name);
119 fprintf(fout, "user user_u roles { base_r }");
120 if (mls)
121 fprintf(fout, " level %s range %s - %s", SYSTEMLOW,
122 SYSTEMLOW, SYSTEMHIGH);
123 fprintf(fout, ";\n");
124
125#define SUBJUSERROLETYPE "user_u:base_r:base_t"
126#define OBJUSERROLETYPE "user_u:object_r:base_t"
127
128 /* default sids */
129 for (i = 1; i < initial_sid_to_string_len; i++)
130 fprintf(fout, "sid %s " SUBJUSERROLETYPE "%s\n",
131 initial_sid_to_string[i], mls ? ":" SYSTEMLOW : "");
132 fprintf(fout, "\n");
133
134#define FS_USE(behavior, fstype) \
135 fprintf(fout, "fs_use_%s %s " OBJUSERROLETYPE "%s;\n", \
136 behavior, fstype, mls ? ":" SYSTEMLOW : "")
137
138 /*
139 * Filesystems whose inode labels can be fetched via getxattr.
140 */
141#ifdef CONFIG_EXT2_FS_SECURITY
142 FS_USE("xattr", "ext2");
143#endif
144#ifdef CONFIG_EXT4_FS_SECURITY
145#ifdef CONFIG_EXT4_USE_FOR_EXT2
146 FS_USE("xattr", "ext2");
147#endif
148 FS_USE("xattr", "ext3");
149 FS_USE("xattr", "ext4");
150#endif
151#ifdef CONFIG_JFS_SECURITY
152 FS_USE("xattr", "jfs");
153#endif
154#ifdef CONFIG_REISERFS_FS_SECURITY
155 FS_USE("xattr", "reiserfs");
156#endif
157#ifdef CONFIG_JFFS2_FS_SECURITY
158 FS_USE("xattr", "jffs2");
159#endif
160#ifdef CONFIG_XFS_FS
161 FS_USE("xattr", "xfs");
162#endif
163#ifdef CONFIG_GFS2_FS
164 FS_USE("xattr", "gfs2");
165#endif
166#ifdef CONFIG_BTRFS_FS
167 FS_USE("xattr", "btrfs");
168#endif
169#ifdef CONFIG_F2FS_FS_SECURITY
170 FS_USE("xattr", "f2fs");
171#endif
172#ifdef CONFIG_OCFS2_FS
173 FS_USE("xattr", "ocsfs2");
174#endif
175#ifdef CONFIG_OVERLAY_FS
176 FS_USE("xattr", "overlay");
177#endif
178#ifdef CONFIG_SQUASHFS_XATTR
179 FS_USE("xattr", "squashfs");
180#endif
181
182 /*
183 * Filesystems whose inodes are labeled from allocating task.
184 */
185 FS_USE("task", "pipefs");
186 FS_USE("task", "sockfs");
187
188 /*
189 * Filesystems whose inode labels are computed from both
190 * the allocating task and the superblock label.
191 */
192#ifdef CONFIG_UNIX98_PTYS
193 FS_USE("trans", "devpts");
194#endif
195#ifdef CONFIG_HUGETLBFS
196 FS_USE("trans", "hugetlbfs");
197#endif
198#ifdef CONFIG_TMPFS
199 FS_USE("trans", "tmpfs");
200#endif
201#ifdef CONFIG_DEVTMPFS
202 FS_USE("trans", "devtmpfs");
203#endif
204#ifdef CONFIG_POSIX_MQUEUE
205 FS_USE("trans", "mqueue");
206#endif
207
208#define GENFSCON(fstype, prefix) \
209 fprintf(fout, "genfscon %s %s " OBJUSERROLETYPE "%s\n", \
210 fstype, prefix, mls ? ":" SYSTEMLOW : "")
211
212 /*
213 * Filesystems whose inodes are labeled from path prefix match
214 * relative to the filesystem root. Depending on the filesystem,
215 * only a single label for all inodes may be supported. Here
216 * we list the filesystem types for which per-file labeling is
217 * supported using genfscon; any other filesystem type can also
218 * be added by only with a single entry for all of its inodes.
219 */
220#ifdef CONFIG_PROC_FS
221 GENFSCON("proc", "/");
222#endif
223#ifdef CONFIG_SECURITY_SELINUX
224 GENFSCON("selinuxfs", "/");
225#endif
226#ifdef CONFIG_SYSFS
227 GENFSCON("sysfs", "/");
228#endif
229#ifdef CONFIG_DEBUG_FS
230 GENFSCON("debugfs", "/");
231#endif
232#ifdef CONFIG_TRACING
233 GENFSCON("tracefs", "/");
234#endif
235#ifdef CONFIG_PSTORE
236 GENFSCON("pstore", "/");
237#endif
238 GENFSCON("cgroup", "/");
239 GENFSCON("cgroup2", "/");
240
241 fclose(fout);
242
243 fout = fopen(ctxout, "w");
244 if (!fout) {
245 printf("Wrote policy, but cannot open %s for writing\n", ctxout);
246 usage(argv[0]);
247 }
248 fprintf(fout, "/ " OBJUSERROLETYPE "%s\n", mls ? ":" SYSTEMLOW : "");
249 fprintf(fout, "/.* " OBJUSERROLETYPE "%s\n", mls ? ":" SYSTEMLOW : "");
250 fclose(fout);
251
252 return 0;
253}
1/*
2 *
3 * mdp - make dummy policy
4 *
5 * When pointed at a kernel tree, builds a dummy policy for that kernel
6 * with exactly one type with full rights to itself.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 *
22 * Copyright (C) IBM Corporation, 2006
23 *
24 * Authors: Serge E. Hallyn <serue@us.ibm.com>
25 */
26
27#include <stdio.h>
28#include <stdlib.h>
29#include <unistd.h>
30#include <string.h>
31
32static void usage(char *name)
33{
34 printf("usage: %s [-m] policy_file context_file\n", name);
35 exit(1);
36}
37
38/* Class/perm mapping support */
39struct security_class_mapping {
40 const char *name;
41 const char *perms[sizeof(unsigned) * 8 + 1];
42};
43
44#include "classmap.h"
45#include "initial_sid_to_string.h"
46
47int main(int argc, char *argv[])
48{
49 int i, j, mls = 0;
50 int initial_sid_to_string_len;
51 char **arg, *polout, *ctxout;
52
53 FILE *fout;
54
55 if (argc < 3)
56 usage(argv[0]);
57 arg = argv+1;
58 if (argc==4 && strcmp(argv[1], "-m") == 0) {
59 mls = 1;
60 arg++;
61 }
62 polout = *arg++;
63 ctxout = *arg;
64
65 fout = fopen(polout, "w");
66 if (!fout) {
67 printf("Could not open %s for writing\n", polout);
68 usage(argv[0]);
69 }
70
71 /* print out the classes */
72 for (i = 0; secclass_map[i].name; i++)
73 fprintf(fout, "class %s\n", secclass_map[i].name);
74 fprintf(fout, "\n");
75
76 initial_sid_to_string_len = sizeof(initial_sid_to_string) / sizeof (char *);
77 /* print out the sids */
78 for (i = 1; i < initial_sid_to_string_len; i++)
79 fprintf(fout, "sid %s\n", initial_sid_to_string[i]);
80 fprintf(fout, "\n");
81
82 /* print out the class permissions */
83 for (i = 0; secclass_map[i].name; i++) {
84 struct security_class_mapping *map = &secclass_map[i];
85 fprintf(fout, "class %s\n", map->name);
86 fprintf(fout, "{\n");
87 for (j = 0; map->perms[j]; j++)
88 fprintf(fout, "\t%s\n", map->perms[j]);
89 fprintf(fout, "}\n\n");
90 }
91 fprintf(fout, "\n");
92
93 /* NOW PRINT OUT MLS STUFF */
94 if (mls) {
95 printf("MLS not yet implemented\n");
96 exit(1);
97 }
98
99 /* types, roles, and allows */
100 fprintf(fout, "type base_t;\n");
101 fprintf(fout, "role base_r;\n");
102 fprintf(fout, "role base_r types { base_t };\n");
103 for (i = 0; secclass_map[i].name; i++)
104 fprintf(fout, "allow base_t base_t:%s *;\n",
105 secclass_map[i].name);
106 fprintf(fout, "user user_u roles { base_r };\n");
107 fprintf(fout, "\n");
108
109 /* default sids */
110 for (i = 1; i < initial_sid_to_string_len; i++)
111 fprintf(fout, "sid %s user_u:base_r:base_t\n", initial_sid_to_string[i]);
112 fprintf(fout, "\n");
113
114 fprintf(fout, "fs_use_xattr ext2 user_u:base_r:base_t;\n");
115 fprintf(fout, "fs_use_xattr ext3 user_u:base_r:base_t;\n");
116 fprintf(fout, "fs_use_xattr ext4 user_u:base_r:base_t;\n");
117 fprintf(fout, "fs_use_xattr jfs user_u:base_r:base_t;\n");
118 fprintf(fout, "fs_use_xattr xfs user_u:base_r:base_t;\n");
119 fprintf(fout, "fs_use_xattr reiserfs user_u:base_r:base_t;\n");
120 fprintf(fout, "fs_use_xattr jffs2 user_u:base_r:base_t;\n");
121 fprintf(fout, "fs_use_xattr gfs2 user_u:base_r:base_t;\n");
122 fprintf(fout, "fs_use_xattr lustre user_u:base_r:base_t;\n");
123
124 fprintf(fout, "fs_use_task eventpollfs user_u:base_r:base_t;\n");
125 fprintf(fout, "fs_use_task pipefs user_u:base_r:base_t;\n");
126 fprintf(fout, "fs_use_task sockfs user_u:base_r:base_t;\n");
127
128 fprintf(fout, "fs_use_trans mqueue user_u:base_r:base_t;\n");
129 fprintf(fout, "fs_use_trans devpts user_u:base_r:base_t;\n");
130 fprintf(fout, "fs_use_trans hugetlbfs user_u:base_r:base_t;\n");
131 fprintf(fout, "fs_use_trans tmpfs user_u:base_r:base_t;\n");
132 fprintf(fout, "fs_use_trans shm user_u:base_r:base_t;\n");
133
134 fprintf(fout, "genfscon proc / user_u:base_r:base_t\n");
135
136 fclose(fout);
137
138 fout = fopen(ctxout, "w");
139 if (!fout) {
140 printf("Wrote policy, but cannot open %s for writing\n", ctxout);
141 usage(argv[0]);
142 }
143 fprintf(fout, "/ user_u:base_r:base_t\n");
144 fprintf(fout, "/.* user_u:base_r:base_t\n");
145 fclose(fout);
146
147 return 0;
148}