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 28 /* NOTE: we really do want to use the kernel headers here */ 29 #define __EXPORTED_HEADERS__ 30 31 #include <stdio.h> 32 #include <stdlib.h> 33 #include <unistd.h> 34 #include <string.h> 35 #include <sys/socket.h> 36 37 static void usage(char *name) 38 { 39 printf("usage: %s [-m] policy_file context_file\n", name); 40 exit(1); 41 } 42 43 /* Class/perm mapping support */ 44 struct security_class_mapping { 45 const char *name; 46 const char *perms[sizeof(unsigned) * 8 + 1]; 47 }; 48 49 #include "classmap.h" 50 #include "initial_sid_to_string.h" 51 52 int main(int argc, char *argv[]) 53 { 54 int i, j, mls = 0; 55 int initial_sid_to_string_len; 56 char **arg, *polout, *ctxout; 57 58 FILE *fout; 59 60 if (argc < 3) 61 usage(argv[0]); 62 arg = argv+1; 63 if (argc==4 && strcmp(argv[1], "-m") == 0) { 64 mls = 1; 65 arg++; 66 } 67 polout = *arg++; 68 ctxout = *arg; 69 70 fout = fopen(polout, "w"); 71 if (!fout) { 72 printf("Could not open %s for writing\n", polout); 73 usage(argv[0]); 74 } 75 76 /* print out the classes */ 77 for (i = 0; secclass_map[i].name; i++) 78 fprintf(fout, "class %s\n", secclass_map[i].name); 79 fprintf(fout, "\n"); 80 81 initial_sid_to_string_len = sizeof(initial_sid_to_string) / sizeof (char *); 82 /* print out the sids */ 83 for (i = 1; i < initial_sid_to_string_len; i++) 84 fprintf(fout, "sid %s\n", initial_sid_to_string[i]); 85 fprintf(fout, "\n"); 86 87 /* print out the class permissions */ 88 for (i = 0; secclass_map[i].name; i++) { 89 struct security_class_mapping *map = &secclass_map[i]; 90 fprintf(fout, "class %s\n", map->name); 91 fprintf(fout, "{\n"); 92 for (j = 0; map->perms[j]; j++) 93 fprintf(fout, "\t%s\n", map->perms[j]); 94 fprintf(fout, "}\n\n"); 95 } 96 fprintf(fout, "\n"); 97 98 /* NOW PRINT OUT MLS STUFF */ 99 if (mls) { 100 printf("MLS not yet implemented\n"); 101 exit(1); 102 } 103 104 /* types, roles, and allows */ 105 fprintf(fout, "type base_t;\n"); 106 fprintf(fout, "role base_r;\n"); 107 fprintf(fout, "role base_r types { base_t };\n"); 108 for (i = 0; secclass_map[i].name; i++) 109 fprintf(fout, "allow base_t base_t:%s *;\n", 110 secclass_map[i].name); 111 fprintf(fout, "user user_u roles { base_r };\n"); 112 fprintf(fout, "\n"); 113 114 /* default sids */ 115 for (i = 1; i < initial_sid_to_string_len; i++) 116 fprintf(fout, "sid %s user_u:base_r:base_t\n", initial_sid_to_string[i]); 117 fprintf(fout, "\n"); 118 119 fprintf(fout, "fs_use_xattr ext2 user_u:base_r:base_t;\n"); 120 fprintf(fout, "fs_use_xattr ext3 user_u:base_r:base_t;\n"); 121 fprintf(fout, "fs_use_xattr ext4 user_u:base_r:base_t;\n"); 122 fprintf(fout, "fs_use_xattr jfs user_u:base_r:base_t;\n"); 123 fprintf(fout, "fs_use_xattr xfs user_u:base_r:base_t;\n"); 124 fprintf(fout, "fs_use_xattr reiserfs user_u:base_r:base_t;\n"); 125 fprintf(fout, "fs_use_xattr jffs2 user_u:base_r:base_t;\n"); 126 fprintf(fout, "fs_use_xattr gfs2 user_u:base_r:base_t;\n"); 127 128 fprintf(fout, "fs_use_task eventpollfs user_u:base_r:base_t;\n"); 129 fprintf(fout, "fs_use_task pipefs user_u:base_r:base_t;\n"); 130 fprintf(fout, "fs_use_task sockfs user_u:base_r:base_t;\n"); 131 132 fprintf(fout, "fs_use_trans mqueue user_u:base_r:base_t;\n"); 133 fprintf(fout, "fs_use_trans devpts user_u:base_r:base_t;\n"); 134 fprintf(fout, "fs_use_trans hugetlbfs user_u:base_r:base_t;\n"); 135 fprintf(fout, "fs_use_trans tmpfs user_u:base_r:base_t;\n"); 136 fprintf(fout, "fs_use_trans shm user_u:base_r:base_t;\n"); 137 138 fprintf(fout, "genfscon proc / user_u:base_r:base_t\n"); 139 140 fclose(fout); 141 142 fout = fopen(ctxout, "w"); 143 if (!fout) { 144 printf("Wrote policy, but cannot open %s for writing\n", ctxout); 145 usage(argv[0]); 146 } 147 fprintf(fout, "/ user_u:base_r:base_t\n"); 148 fprintf(fout, "/.* user_u:base_r:base_t\n"); 149 fclose(fout); 150 151 return 0; 152 } 153