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 types { base_t };\n"); 102 for (i = 0; secclass_map[i].name; i++) 103 fprintf(fout, "allow base_t base_t:%s *;\n", 104 secclass_map[i].name); 105 fprintf(fout, "user user_u roles { base_r };\n"); 106 fprintf(fout, "\n"); 107 108 /* default sids */ 109 for (i = 1; i < initial_sid_to_string_len; i++) 110 fprintf(fout, "sid %s user_u:base_r:base_t\n", initial_sid_to_string[i]); 111 fprintf(fout, "\n"); 112 113 fprintf(fout, "fs_use_xattr ext2 user_u:base_r:base_t;\n"); 114 fprintf(fout, "fs_use_xattr ext3 user_u:base_r:base_t;\n"); 115 fprintf(fout, "fs_use_xattr ext4 user_u:base_r:base_t;\n"); 116 fprintf(fout, "fs_use_xattr jfs user_u:base_r:base_t;\n"); 117 fprintf(fout, "fs_use_xattr xfs user_u:base_r:base_t;\n"); 118 fprintf(fout, "fs_use_xattr reiserfs user_u:base_r:base_t;\n"); 119 fprintf(fout, "fs_use_xattr jffs2 user_u:base_r:base_t;\n"); 120 fprintf(fout, "fs_use_xattr gfs2 user_u:base_r:base_t;\n"); 121 fprintf(fout, "fs_use_xattr lustre user_u:base_r:base_t;\n"); 122 123 fprintf(fout, "fs_use_task eventpollfs user_u:base_r:base_t;\n"); 124 fprintf(fout, "fs_use_task pipefs user_u:base_r:base_t;\n"); 125 fprintf(fout, "fs_use_task sockfs user_u:base_r:base_t;\n"); 126 127 fprintf(fout, "fs_use_trans mqueue user_u:base_r:base_t;\n"); 128 fprintf(fout, "fs_use_trans devpts user_u:base_r:base_t;\n"); 129 fprintf(fout, "fs_use_trans hugetlbfs user_u:base_r:base_t;\n"); 130 fprintf(fout, "fs_use_trans tmpfs user_u:base_r:base_t;\n"); 131 fprintf(fout, "fs_use_trans shm user_u:base_r:base_t;\n"); 132 133 fprintf(fout, "genfscon proc / user_u:base_r:base_t\n"); 134 135 fclose(fout); 136 137 fout = fopen(ctxout, "w"); 138 if (!fout) { 139 printf("Wrote policy, but cannot open %s for writing\n", ctxout); 140 usage(argv[0]); 141 } 142 fprintf(fout, "/ user_u:base_r:base_t\n"); 143 fprintf(fout, "/.* user_u:base_r:base_t\n"); 144 fclose(fout); 145 146 return 0; 147} 148