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5c72513843
Signed-off-by: Trevor Keith <tsrk@tsrk.net> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
243 lines
5.9 KiB
C
243 lines
5.9 KiB
C
/*
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*
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* mdp - make dummy policy
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*
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* When pointed at a kernel tree, builds a dummy policy for that kernel
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* with exactly one type with full rights to itself.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) IBM Corporation, 2006
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*
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* Authors: Serge E. Hallyn <serue@us.ibm.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "flask.h"
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static void usage(char *name)
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{
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printf("usage: %s [-m] policy_file context_file\n", name);
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exit(1);
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}
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static void find_common_name(char *cname, char *dest, int len)
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{
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char *start, *end;
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start = strchr(cname, '_')+1;
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end = strchr(start, '_');
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if (!start || !end || start-cname > len || end-start > len) {
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printf("Error with commons defines\n");
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exit(1);
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}
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strncpy(dest, start, end-start);
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dest[end-start] = '\0';
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}
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#define S_(x) x,
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static char *classlist[] = {
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#include "class_to_string.h"
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NULL
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};
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#undef S_
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#include "initial_sid_to_string.h"
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#define TB_(x) char *x[] = {
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#define TE_(x) NULL };
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#define S_(x) x,
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#include "common_perm_to_string.h"
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#undef TB_
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#undef TE_
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#undef S_
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struct common {
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char *cname;
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char **perms;
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};
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struct common common[] = {
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#define TB_(x) { #x, x },
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#define S_(x)
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#define TE_(x)
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#include "common_perm_to_string.h"
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#undef TB_
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#undef TE_
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#undef S_
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};
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#define S_(x, y, z) {x, #y},
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struct av_inherit {
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int class;
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char *common;
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};
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struct av_inherit av_inherit[] = {
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#include "av_inherit.h"
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};
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#undef S_
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#include "av_permissions.h"
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#define S_(x, y, z) {x, y, z},
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struct av_perms {
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int class;
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int perm_i;
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char *perm_s;
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};
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struct av_perms av_perms[] = {
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#include "av_perm_to_string.h"
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};
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#undef S_
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int main(int argc, char *argv[])
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{
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int i, j, mls = 0;
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char **arg, *polout, *ctxout;
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int classlist_len, initial_sid_to_string_len;
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FILE *fout;
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if (argc < 3)
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usage(argv[0]);
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arg = argv+1;
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if (argc==4 && strcmp(argv[1], "-m") == 0) {
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mls = 1;
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arg++;
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}
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polout = *arg++;
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ctxout = *arg;
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fout = fopen(polout, "w");
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if (!fout) {
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printf("Could not open %s for writing\n", polout);
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usage(argv[0]);
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}
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classlist_len = sizeof(classlist) / sizeof(char *);
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/* print out the classes */
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for (i=1; i < classlist_len; i++) {
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if(classlist[i])
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fprintf(fout, "class %s\n", classlist[i]);
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else
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fprintf(fout, "class user%d\n", i);
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}
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fprintf(fout, "\n");
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initial_sid_to_string_len = sizeof(initial_sid_to_string) / sizeof (char *);
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/* print out the sids */
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for (i=1; i < initial_sid_to_string_len; i++)
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fprintf(fout, "sid %s\n", initial_sid_to_string[i]);
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fprintf(fout, "\n");
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/* print out the commons */
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for (i=0; i< sizeof(common)/sizeof(struct common); i++) {
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char cname[101];
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find_common_name(common[i].cname, cname, 100);
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cname[100] = '\0';
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fprintf(fout, "common %s\n{\n", cname);
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for (j=0; common[i].perms[j]; j++)
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fprintf(fout, "\t%s\n", common[i].perms[j]);
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fprintf(fout, "}\n\n");
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}
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fprintf(fout, "\n");
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/* print out the class permissions */
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for (i=1; i < classlist_len; i++) {
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if (classlist[i]) {
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int firstperm = -1, numperms = 0;
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fprintf(fout, "class %s\n", classlist[i]);
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/* does it inherit from a common? */
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for (j=0; j < sizeof(av_inherit)/sizeof(struct av_inherit); j++)
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if (av_inherit[j].class == i)
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fprintf(fout, "inherits %s\n", av_inherit[j].common);
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for (j=0; j < sizeof(av_perms)/sizeof(struct av_perms); j++) {
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if (av_perms[j].class == i) {
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if (firstperm == -1)
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firstperm = j;
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numperms++;
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}
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}
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if (!numperms) {
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fprintf(fout, "\n");
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continue;
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}
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fprintf(fout, "{\n");
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/* print out the av_perms */
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for (j=0; j < numperms; j++) {
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fprintf(fout, "\t%s\n", av_perms[firstperm+j].perm_s);
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}
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fprintf(fout, "}\n\n");
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}
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}
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fprintf(fout, "\n");
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/* NOW PRINT OUT MLS STUFF */
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if (mls) {
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printf("MLS not yet implemented\n");
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exit(1);
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}
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/* types, roles, and allows */
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fprintf(fout, "type base_t;\n");
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fprintf(fout, "role base_r types { base_t };\n");
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for (i=1; i < classlist_len; i++) {
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if (classlist[i])
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fprintf(fout, "allow base_t base_t:%s *;\n", classlist[i]);
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else
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fprintf(fout, "allow base_t base_t:user%d *;\n", i);
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}
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fprintf(fout, "user user_u roles { base_r };\n");
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fprintf(fout, "\n");
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/* default sids */
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for (i=1; i < initial_sid_to_string_len; i++)
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fprintf(fout, "sid %s user_u:base_r:base_t\n", initial_sid_to_string[i]);
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fprintf(fout, "\n");
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fprintf(fout, "fs_use_xattr ext2 user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_xattr ext3 user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_xattr jfs user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_xattr xfs user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_xattr reiserfs user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_task pipefs user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_task sockfs user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_trans devpts user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_trans tmpfs user_u:base_r:base_t;\n");
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fprintf(fout, "fs_use_trans shm user_u:base_r:base_t;\n");
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fprintf(fout, "genfscon proc / user_u:base_r:base_t\n");
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fclose(fout);
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fout = fopen(ctxout, "w");
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if (!fout) {
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printf("Wrote policy, but cannot open %s for writing\n", ctxout);
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usage(argv[0]);
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}
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fprintf(fout, "/ user_u:base_r:base_t\n");
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fprintf(fout, "/.* user_u:base_r:base_t\n");
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fclose(fout);
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return 0;
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}
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