1 /*
2 * Copyright 2011 Tresys Technology, LLC. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
6 *
7 * 1. Redistributions of source code must retain the above copyright notice,
8 * this list of conditions and the following disclaimer.
9 *
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY TRESYS TECHNOLOGY, LLC ``AS IS'' AND ANY EXPRESS
15 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
17 * EVENT SHALL TRESYS TECHNOLOGY, LLC OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
18 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
22 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
23 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * The views and conclusions contained in the software and documentation are those
26 * of the authors and should not be interpreted as representing official policies,
27 * either expressed or implied, of Tresys Technology, LLC.
28 */
29
30 #include <stdlib.h>
31 #include <stdio.h>
32 #include <stdint.h>
33 #include <string.h>
34 #include <getopt.h>
35 #include <sys/stat.h>
36
37 #ifdef ANDROID
38 #include <cil/cil.h>
39 #else
40 #include <sepol/cil/cil.h>
41 #endif
42 #include <sepol/policydb.h>
43
usage(char * prog)44 void usage(char *prog)
45 {
46 printf("Usage: %s [OPTION]... FILE...\n", prog);
47 printf("\n");
48 printf("Options:\n");
49 printf(" -o, --output=<file> write binary policy to <file>\n");
50 printf(" (default: policy.<version>)\n");
51 printf(" -f, --filecontext=<file> write file contexts to <file>\n");
52 printf(" (default: file_contexts)\n");
53 printf(" -t, --target=<type> specify target architecture. may be selinux or\n");
54 printf(" xen. (default: selinux)\n");
55 printf(" -M, --mls true|false build an mls policy. Must be true or false.\n");
56 printf(" This will override the (mls boolean) statement\n");
57 printf(" if present in the policy\n");
58 printf(" -c, --policyvers=<version> build a binary policy with a given <version>\n");
59 printf(" (default: %i)\n", POLICYDB_VERSION_MAX);
60 printf(" -U, --handle-unknown=<action> how to handle unknown classes or permissions.\n");
61 printf(" may be deny, allow, or reject. (default: deny)\n");
62 printf(" This will override the (handleunknown action)\n");
63 printf(" statement if present in the policy\n");
64 printf(" -D, --disable-dontaudit do not add dontaudit rules to the binary policy\n");
65 printf(" -P, --preserve-tunables treat tunables as booleans\n");
66 printf(" -N, --disable-neverallow do not check neverallow rules\n");
67 printf(" -G, --expand-generated Expand and remove auto-generated attributes\n");
68 printf(" -X, --expand-size <SIZE> Expand type attributes with fewer than <SIZE>\n");
69 printf(" members.\n");
70 printf(" -v, --verbose increment verbosity level\n");
71 printf(" -h, --help display usage information\n");
72 exit(1);
73 }
74
main(int argc,char * argv[])75 int main(int argc, char *argv[])
76 {
77 int rc = SEPOL_ERR;
78 sepol_policydb_t *pdb = NULL;
79 struct sepol_policy_file *pf = NULL;
80 FILE *binary = NULL;
81 FILE *file_contexts;
82 FILE *file = NULL;
83 char *buffer = NULL;
84 struct stat filedata;
85 uint32_t file_size;
86 char *output = NULL;
87 char *filecontexts = NULL;
88 struct cil_db *db = NULL;
89 int target = SEPOL_TARGET_SELINUX;
90 int mls = -1;
91 int disable_dontaudit = 0;
92 int disable_neverallow = 0;
93 int preserve_tunables = 0;
94 int handle_unknown = -1;
95 int policyvers = POLICYDB_VERSION_MAX;
96 int attrs_expand_generated = 0;
97 int attrs_expand_size = -1;
98 int opt_char;
99 int opt_index = 0;
100 char *fc_buf = NULL;
101 size_t fc_size;
102 enum cil_log_level log_level = CIL_ERR;
103 static struct option long_opts[] = {
104 {"help", no_argument, 0, 'h'},
105 {"verbose", no_argument, 0, 'v'},
106 {"target", required_argument, 0, 't'},
107 {"mls", required_argument, 0, 'M'},
108 {"policyversion", required_argument, 0, 'c'},
109 {"handle-unknown", required_argument, 0, 'U'},
110 {"disable-dontaudit", no_argument, 0, 'D'},
111 {"disable-neverallow", no_argument, 0, 'N'},
112 {"preserve-tunables", no_argument, 0, 'P'},
113 {"output", required_argument, 0, 'o'},
114 {"filecontexts", required_argument, 0, 'f'},
115 {"expand-generated", no_argument, 0, 'G'},
116 {"expand-size", required_argument, 0, 'X'},
117 {0, 0, 0, 0}
118 };
119 int i;
120
121 while (1) {
122 opt_char = getopt_long(argc, argv, "o:f:U:hvt:M:PDNc:GX:", long_opts, &opt_index);
123 if (opt_char == -1) {
124 break;
125 }
126 switch (opt_char) {
127 case 'v':
128 log_level++;
129 break;
130 case 't':
131 if (!strcmp(optarg, "selinux")) {
132 target = SEPOL_TARGET_SELINUX;
133 } else if (!strcmp(optarg, "xen")) {
134 target = SEPOL_TARGET_XEN;
135 } else {
136 fprintf(stderr, "Unknown target: %s\n", optarg);
137 usage(argv[0]);
138 }
139 break;
140 case 'M':
141 if (!strcasecmp(optarg, "true") || !strcasecmp(optarg, "1")) {
142 mls = 1;
143 } else if (!strcasecmp(optarg, "false") || !strcasecmp(optarg, "0")) {
144 mls = 0;
145 } else {
146 usage(argv[0]);
147 }
148 break;
149 case 'c': {
150 char *endptr = NULL;
151 errno = 0;
152 policyvers = strtol(optarg, &endptr, 10);
153 if (errno != 0 || endptr == optarg || *endptr != '\0') {
154 fprintf(stderr, "Bad policy version: %s\n", optarg);
155 usage(argv[0]);
156 }
157 if (policyvers > POLICYDB_VERSION_MAX || policyvers < POLICYDB_VERSION_MIN) {
158 fprintf(stderr, "Policy version must be between %d and %d\n",
159 POLICYDB_VERSION_MIN, POLICYDB_VERSION_MAX);
160 usage(argv[0]);
161 }
162 break;
163 }
164 case 'U':
165 if (!strcasecmp(optarg, "deny")) {
166 handle_unknown = SEPOL_DENY_UNKNOWN;
167 } else if (!strcasecmp(optarg, "allow")) {
168 handle_unknown = SEPOL_ALLOW_UNKNOWN;
169 } else if (!strcasecmp(optarg, "reject")) {
170 handle_unknown = SEPOL_REJECT_UNKNOWN;
171 } else {
172 usage(argv[0]);
173 }
174 break;
175 case 'D':
176 disable_dontaudit = 1;
177 break;
178 case 'N':
179 disable_neverallow = 1;
180 break;
181 case 'P':
182 preserve_tunables = 1;
183 break;
184 case 'o':
185 output = strdup(optarg);
186 break;
187 case 'f':
188 filecontexts = strdup(optarg);
189 break;
190 case 'G':
191 attrs_expand_generated = 1;
192 break;
193 case 'X': {
194 char *endptr = NULL;
195 errno = 0;
196 attrs_expand_size = strtol(optarg, &endptr, 10);
197 if (errno != 0 || endptr == optarg || *endptr != '\0') {
198 fprintf(stderr, "Bad attribute expand size: %s\n", optarg);
199 usage(argv[0]);
200 }
201
202 if (attrs_expand_size < 0) {
203 fprintf(stderr, "Attribute expand size must be > 0\n");
204 usage(argv[0]);
205 }
206 break;
207 }
208 case 'h':
209 usage(argv[0]);
210 case '?':
211 break;
212 default:
213 fprintf(stderr, "Unsupported option: %s\n", optarg);
214 usage(argv[0]);
215 }
216 }
217 if (optind >= argc) {
218 fprintf(stderr, "No cil files specified\n");
219 usage(argv[0]);
220 }
221
222 cil_set_log_level(log_level);
223
224 cil_db_init(&db);
225 cil_set_disable_dontaudit(db, disable_dontaudit);
226 cil_set_disable_neverallow(db, disable_neverallow);
227 cil_set_preserve_tunables(db, preserve_tunables);
228 if (handle_unknown != -1) {
229 rc = cil_set_handle_unknown(db, handle_unknown);
230 if (rc != SEPOL_OK) {
231 goto exit;
232 }
233 }
234
235 cil_set_mls(db, mls);
236 cil_set_target_platform(db, target);
237 cil_set_policy_version(db, policyvers);
238 cil_set_attrs_expand_generated(db, attrs_expand_generated);
239 if (attrs_expand_size >= 0) {
240 cil_set_attrs_expand_size(db, (unsigned)attrs_expand_size);
241 }
242
243 for (i = optind; i < argc; i++) {
244 file = fopen(argv[i], "r");
245 if (!file) {
246 fprintf(stderr, "Could not open file: %s\n", argv[i]);
247 rc = SEPOL_ERR;
248 goto exit;
249 }
250 rc = stat(argv[i], &filedata);
251 if (rc == -1) {
252 fprintf(stderr, "Could not stat file: %s\n", argv[i]);
253 goto exit;
254 }
255 file_size = filedata.st_size;
256
257 buffer = malloc(file_size);
258 rc = fread(buffer, file_size, 1, file);
259 if (rc != 1) {
260 fprintf(stderr, "Failure reading file: %s\n", argv[i]);
261 goto exit;
262 }
263 fclose(file);
264 file = NULL;
265
266 rc = cil_add_file(db, argv[i], buffer, file_size);
267 if (rc != SEPOL_OK) {
268 fprintf(stderr, "Failure adding %s\n", argv[i]);
269 goto exit;
270 }
271
272 free(buffer);
273 buffer = NULL;
274 }
275
276 rc = cil_compile(db);
277 if (rc != SEPOL_OK) {
278 fprintf(stderr, "Failed to compile cildb: %d\n", rc);
279 goto exit;
280 }
281
282 rc = cil_build_policydb(db, &pdb);
283 if (rc != SEPOL_OK) {
284 fprintf(stderr, "Failed to build policydb\n");
285 goto exit;
286 }
287
288 if (output == NULL) {
289 int size = snprintf(NULL, 0, "policy.%d", policyvers);
290 output = malloc((size + 1) * sizeof(char));
291 if (output == NULL) {
292 fprintf(stderr, "Failed to create output filename\n");
293 rc = SEPOL_ERR;
294 goto exit;
295 }
296 if (snprintf(output, size + 1, "policy.%d", policyvers) != size) {
297 fprintf(stderr, "Failed to create output filename\n");
298 rc = SEPOL_ERR;
299 goto exit;
300 }
301 }
302
303 binary = fopen(output, "w");
304 if (binary == NULL) {
305 fprintf(stderr, "Failure opening binary file for writing\n");
306 rc = SEPOL_ERR;
307 goto exit;
308 }
309
310 rc = sepol_policy_file_create(&pf);
311 if (rc != 0) {
312 fprintf(stderr, "Failed to create policy file: %d\n", rc);
313 goto exit;
314 }
315
316 sepol_policy_file_set_fp(pf, binary);
317
318 rc = sepol_policydb_write(pdb, pf);
319 if (rc != 0) {
320 fprintf(stderr, "Failed to write binary policy: %d\n", rc);
321 goto exit;
322 }
323
324 fclose(binary);
325 binary = NULL;
326
327 rc = cil_filecons_to_string(db, &fc_buf, &fc_size);
328 if (rc != SEPOL_OK) {
329 fprintf(stderr, "Failed to get file context data\n");
330 goto exit;
331 }
332
333 if (filecontexts == NULL) {
334 file_contexts = fopen("file_contexts", "w+");
335 } else {
336 file_contexts = fopen(filecontexts, "w+");
337 }
338
339 if (file_contexts == NULL) {
340 fprintf(stderr, "Failed to open file_contexts file\n");
341 goto exit;
342 }
343
344 if (fwrite(fc_buf, sizeof(char), fc_size, file_contexts) != fc_size) {
345 fprintf(stderr, "Failed to write file_contexts file\n");
346 goto exit;
347 }
348
349 fclose(file_contexts);
350 file_contexts = NULL;
351
352 rc = SEPOL_OK;
353
354 exit:
355 if (binary != NULL) {
356 fclose(binary);
357 }
358 if (file != NULL) {
359 fclose(file);
360 }
361 free(buffer);
362 free(output);
363 free(filecontexts);
364 cil_db_destroy(&db);
365 sepol_policydb_free(pdb);
366 sepol_policy_file_free(pf);
367 free(fc_buf);
368 return rc;
369 }
370