Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Authors: Joshua Brindle <jbrindle@tresys.com> |
| 3 | * Karl MacMillan <kmacmillan@tresys.com> |
| 4 | * Jason Tang <jtang@tresys.com> |
| 5 | * |
| 6 | * |
| 7 | * Copyright (C) 2004-5 Tresys Technology, LLC |
| 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, version 2. |
| 11 | */ |
| 12 | |
| 13 | #include <getopt.h> |
| 14 | #include <unistd.h> |
| 15 | #include <stdlib.h> |
| 16 | #include <sys/types.h> |
| 17 | #include <sys/stat.h> |
| 18 | #include <fcntl.h> |
| 19 | #include <stdio.h> |
| 20 | #include <errno.h> |
| 21 | #include <sys/mman.h> |
| 22 | |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 23 | #include <sepol/module_to_cil.h> |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 24 | #include <sepol/policydb/policydb.h> |
| 25 | #include <sepol/policydb/services.h> |
| 26 | #include <sepol/policydb/conditional.h> |
| 27 | #include <sepol/policydb/flask.h> |
| 28 | #include <sepol/policydb/hierarchy.h> |
| 29 | #include <sepol/policydb/expand.h> |
| 30 | #include <sepol/policydb/link.h> |
| 31 | #include <sepol/policydb/sidtab.h> |
| 32 | |
| 33 | #include "queue.h" |
| 34 | #include "checkpolicy.h" |
| 35 | #include "parse_util.h" |
| 36 | |
| 37 | extern char *optarg; |
| 38 | extern int optind; |
| 39 | |
| 40 | static sidtab_t sidtab; |
| 41 | |
| 42 | extern int mlspol; |
| 43 | |
| 44 | static int handle_unknown = SEPOL_DENY_UNKNOWN; |
Nicolas Iooss | 7dcb7a5 | 2014-09-14 23:41:46 +0200 | [diff] [blame] | 45 | static const char *txtfile = "policy.conf"; |
| 46 | static const char *binfile = "policy"; |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 47 | |
| 48 | unsigned int policy_type = POLICY_BASE; |
| 49 | unsigned int policyvers = MOD_POLICYDB_VERSION_MAX; |
| 50 | |
Nicolas Iooss | 7dcb7a5 | 2014-09-14 23:41:46 +0200 | [diff] [blame] | 51 | static int read_binary_policy(policydb_t * p, const char *file, const char *progname) |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 52 | { |
| 53 | int fd; |
| 54 | struct stat sb; |
| 55 | void *map; |
| 56 | struct policy_file f, *fp; |
| 57 | |
| 58 | fd = open(file, O_RDONLY); |
| 59 | if (fd < 0) { |
| 60 | fprintf(stderr, "Can't open '%s': %s\n", |
| 61 | file, strerror(errno)); |
| 62 | return -1; |
| 63 | } |
| 64 | if (fstat(fd, &sb) < 0) { |
| 65 | fprintf(stderr, "Can't stat '%s': %s\n", |
| 66 | file, strerror(errno)); |
Eric Paris | 87e8d46 | 2012-07-03 14:43:45 -0400 | [diff] [blame] | 67 | close(fd); |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 68 | return -1; |
| 69 | } |
| 70 | map = |
| 71 | mmap(NULL, sb.st_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); |
Eric Paris | 87e8d46 | 2012-07-03 14:43:45 -0400 | [diff] [blame] | 72 | close(fd); |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 73 | if (map == MAP_FAILED) { |
| 74 | fprintf(stderr, "Can't map '%s': %s\n", file, strerror(errno)); |
| 75 | return -1; |
| 76 | } |
| 77 | policy_file_init(&f); |
| 78 | f.type = PF_USE_MEMORY; |
| 79 | f.data = map; |
| 80 | f.len = sb.st_size; |
| 81 | fp = &f; |
| 82 | |
| 83 | if (policydb_init(p)) { |
| 84 | fprintf(stderr, "%s: policydb_init: Out of memory!\n", |
| 85 | progname); |
| 86 | return -1; |
| 87 | } |
| 88 | if (policydb_read(p, fp, 1)) { |
| 89 | fprintf(stderr, |
| 90 | "%s: error(s) encountered while parsing configuration\n", |
| 91 | progname); |
| 92 | return -1; |
| 93 | } |
| 94 | |
| 95 | /* Check Policy Consistency */ |
| 96 | if (p->mls) { |
| 97 | if (!mlspol) { |
| 98 | fprintf(stderr, "%s: MLS policy, but non-MLS" |
| 99 | " is specified\n", progname); |
| 100 | return -1; |
| 101 | } |
| 102 | } else { |
| 103 | if (mlspol) { |
| 104 | fprintf(stderr, "%s: non-MLS policy, but MLS" |
| 105 | " is specified\n", progname); |
| 106 | return -1; |
| 107 | } |
| 108 | } |
| 109 | return 0; |
| 110 | } |
| 111 | |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 112 | static int write_binary_policy(policydb_t * p, FILE *outfp) |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 113 | { |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 114 | struct policy_file pf; |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 115 | |
| 116 | p->policy_type = policy_type; |
| 117 | p->policyvers = policyvers; |
| 118 | p->handle_unknown = handle_unknown; |
| 119 | |
| 120 | policy_file_init(&pf); |
| 121 | pf.type = PF_USE_STDIO; |
| 122 | pf.fp = outfp; |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 123 | return policydb_write(p, &pf); |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | static void usage(char *progname) |
| 127 | { |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 128 | printf("usage: %s [-h] [-V] [-b] [-C] [-U handle_unknown] [-m] [-M] [-o FILE] [INPUT]\n", progname); |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 129 | printf("Build base and policy modules.\n"); |
| 130 | printf("Options:\n"); |
| 131 | printf(" INPUT build module from INPUT (else read from \"%s\")\n", |
| 132 | txtfile); |
| 133 | printf(" -V show policy versions created by this program\n"); |
| 134 | printf(" -b treat input as a binary policy file\n"); |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 135 | printf(" -C output CIL policy instead of binary policy\n"); |
Daniel J Walsh | 36fe4c3 | 2010-06-14 14:44:44 -0400 | [diff] [blame] | 136 | printf(" -h print usage\n"); |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 137 | printf(" -U OPTION How to handle unknown classes and permissions\n"); |
| 138 | printf(" deny: Deny unknown kernel checks\n"); |
| 139 | printf(" reject: Reject loading of policy with unknowns\n"); |
| 140 | printf(" allow: Allow unknown kernel checks\n"); |
| 141 | printf(" -m build a policy module instead of a base module\n"); |
| 142 | printf(" -M enable MLS policy\n"); |
| 143 | printf(" -o FILE write module to FILE (else just check syntax)\n"); |
| 144 | exit(1); |
| 145 | } |
| 146 | |
| 147 | int main(int argc, char **argv) |
| 148 | { |
Nicolas Iooss | 7dcb7a5 | 2014-09-14 23:41:46 +0200 | [diff] [blame] | 149 | const char *file = txtfile, *outfile = NULL; |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 150 | unsigned int binary = 0, cil = 0; |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 151 | int ch; |
| 152 | int show_version = 0; |
| 153 | policydb_t modpolicydb; |
Guido Trentalancia | bf57d23 | 2009-11-02 18:14:28 +0100 | [diff] [blame] | 154 | struct option long_options[] = { |
| 155 | {"help", no_argument, NULL, 'h'}, |
| 156 | {"output", required_argument, NULL, 'o'}, |
| 157 | {"binary", no_argument, NULL, 'b'}, |
| 158 | {"version", no_argument, NULL, 'V'}, |
Laurent Bigonville | f6a03f1 | 2013-07-06 14:32:33 +0200 | [diff] [blame] | 159 | {"handle-unknown", required_argument, NULL, 'U'}, |
Guido Trentalancia | bf57d23 | 2009-11-02 18:14:28 +0100 | [diff] [blame] | 160 | {"mls", no_argument, NULL, 'M'}, |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 161 | {"cil", no_argument, NULL, 'C'}, |
Guido Trentalancia | bf57d23 | 2009-11-02 18:14:28 +0100 | [diff] [blame] | 162 | {NULL, 0, NULL, 0} |
| 163 | }; |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 164 | |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 165 | while ((ch = getopt_long(argc, argv, "ho:bVU:mMC", long_options, NULL)) != -1) { |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 166 | switch (ch) { |
| 167 | case 'h': |
| 168 | usage(argv[0]); |
| 169 | break; |
| 170 | case 'o': |
| 171 | outfile = optarg; |
| 172 | break; |
| 173 | case 'b': |
| 174 | binary = 1; |
| 175 | file = binfile; |
| 176 | break; |
| 177 | case 'V': |
| 178 | show_version = 1; |
| 179 | break; |
| 180 | case 'U': |
| 181 | if (!strcasecmp(optarg, "deny")) { |
| 182 | handle_unknown = DENY_UNKNOWN; |
| 183 | break; |
| 184 | } |
| 185 | if (!strcasecmp(optarg, "reject")) { |
| 186 | handle_unknown = REJECT_UNKNOWN; |
| 187 | break; |
| 188 | } |
| 189 | if (!strcasecmp(optarg, "allow")) { |
| 190 | handle_unknown = ALLOW_UNKNOWN; |
| 191 | break; |
| 192 | } |
| 193 | usage(argv[0]); |
| 194 | case 'm': |
| 195 | policy_type = POLICY_MOD; |
| 196 | policyvers = MOD_POLICYDB_VERSION_MAX; |
| 197 | break; |
| 198 | case 'M': |
| 199 | mlspol = 1; |
| 200 | break; |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 201 | case 'C': |
| 202 | cil = 1; |
| 203 | break; |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 204 | default: |
| 205 | usage(argv[0]); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | if (show_version) { |
| 210 | printf("Module versions %d-%d\n", |
| 211 | MOD_POLICYDB_VERSION_MIN, MOD_POLICYDB_VERSION_MAX); |
| 212 | exit(0); |
| 213 | } |
| 214 | |
| 215 | if (handle_unknown && (policy_type != POLICY_BASE)) { |
Stephen Smalley | bfb8061 | 2014-02-20 14:20:20 -0500 | [diff] [blame] | 216 | fprintf(stderr, "%s: Handling of unknown classes and permissions is only valid in the base module.\n", argv[0]); |
| 217 | exit(1); |
| 218 | } |
| 219 | |
| 220 | if (binary && (policy_type != POLICY_BASE)) { |
| 221 | fprintf(stderr, "%s: -b and -m are incompatible with each other.\n", argv[0]); |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 222 | exit(1); |
| 223 | } |
| 224 | |
| 225 | if (optind != argc) { |
| 226 | file = argv[optind++]; |
| 227 | if (optind != argc) |
| 228 | usage(argv[0]); |
| 229 | } |
| 230 | printf("%s: loading policy configuration from %s\n", argv[0], file); |
| 231 | |
| 232 | /* Set policydb and sidtab used by libsepol service functions |
| 233 | to my structures, so that I can directly populate and |
| 234 | manipulate them. */ |
| 235 | sepol_set_policydb(&modpolicydb); |
| 236 | sepol_set_sidtab(&sidtab); |
| 237 | |
| 238 | if (binary) { |
| 239 | if (read_binary_policy(&modpolicydb, file, argv[0]) == -1) { |
| 240 | exit(1); |
| 241 | } |
| 242 | } else { |
| 243 | if (policydb_init(&modpolicydb)) { |
| 244 | fprintf(stderr, "%s: out of memory!\n", argv[0]); |
| 245 | return -1; |
| 246 | } |
| 247 | |
| 248 | modpolicydb.policy_type = policy_type; |
| 249 | modpolicydb.mls = mlspol; |
| 250 | modpolicydb.handle_unknown = handle_unknown; |
| 251 | |
| 252 | if (read_source_policy(&modpolicydb, file, argv[0]) == -1) { |
| 253 | exit(1); |
| 254 | } |
| 255 | |
| 256 | if (hierarchy_check_constraints(NULL, &modpolicydb)) { |
| 257 | return -1; |
| 258 | } |
| 259 | } |
| 260 | |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 261 | if (modpolicydb.policy_type == POLICY_BASE && !cil) { |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 262 | /* Verify that we can successfully expand the base module. */ |
| 263 | policydb_t kernpolicydb; |
| 264 | |
| 265 | if (policydb_init(&kernpolicydb)) { |
| 266 | fprintf(stderr, "%s: policydb_init failed\n", argv[0]); |
| 267 | exit(1); |
| 268 | } |
| 269 | if (link_modules(NULL, &modpolicydb, NULL, 0, 0)) { |
| 270 | fprintf(stderr, "%s: link modules failed\n", argv[0]); |
| 271 | exit(1); |
| 272 | } |
| 273 | if (expand_module(NULL, &modpolicydb, &kernpolicydb, 0, 1)) { |
| 274 | fprintf(stderr, "%s: expand module failed\n", argv[0]); |
| 275 | exit(1); |
| 276 | } |
| 277 | policydb_destroy(&kernpolicydb); |
| 278 | } |
| 279 | |
| 280 | if (policydb_load_isids(&modpolicydb, &sidtab)) |
| 281 | exit(1); |
| 282 | |
| 283 | sepol_sidtab_destroy(&sidtab); |
| 284 | |
| 285 | printf("%s: policy configuration loaded\n", argv[0]); |
| 286 | |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 287 | if (outfile) { |
| 288 | FILE *outfp = fopen(outfile, "w"); |
| 289 | |
| 290 | if (!outfp) { |
| 291 | perror(outfile); |
| 292 | exit(1); |
| 293 | } |
| 294 | |
| 295 | if (!cil) { |
| 296 | printf("%s: writing binary representation (version %d) to %s\n", |
| 297 | argv[0], policyvers, file); |
| 298 | |
| 299 | if (write_binary_policy(&modpolicydb, outfp) != 0) { |
| 300 | fprintf(stderr, "%s: error writing %s\n", argv[0], outfile); |
| 301 | exit(1); |
| 302 | } |
| 303 | } else { |
| 304 | printf("%s: writing CIL to %s\n",argv[0], outfile); |
| 305 | |
| 306 | if (sepol_module_policydb_to_cil(outfp, &modpolicydb, 0) != 0) { |
| 307 | fprintf(stderr, "%s: error writing %s\n", argv[0], outfile); |
| 308 | exit(1); |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | fclose(outfp); |
| 313 | } else if (cil) { |
| 314 | fprintf(stderr, "%s: No file to write CIL was specified\n", argv[0]); |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 315 | exit(1); |
| 316 | } |
James Carter | b1d9456 | 2015-04-01 10:05:04 -0400 | [diff] [blame] | 317 | |
Joshua Brindle | 13cd4c8 | 2008-08-19 15:30:36 -0400 | [diff] [blame] | 318 | policydb_destroy(&modpolicydb); |
| 319 | |
| 320 | return 0; |
| 321 | } |
| 322 | |
| 323 | /* FLASK */ |