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#! /usr/bin/python -Es # Copyright (C) 2005 Red Hat # see file 'COPYING' for use and warranty information # # chcat is a script that allows you modify the Security label on a file # #` Author: Daniel Walsh <dwalsh@redhat.com> # # This program is free software; you can redistribute it and/or # modify it under the terms of the GNU General Public License as # published by the Free Software Foundation; either version 2 of # the License, or (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA # 02111-1307 USA # # try: from subprocess import getstatusoutput except ImportError: from commands import getstatusoutput import sys import os import pwd import string import getopt import selinux import seobject import gettext try: gettext.install('policycoreutils') except IOError: try: import builtins builtins.__dict__['_'] = str except ImportError: import __builtin__ __builtin__.__dict__['_'] = unicode def errorExit(error): sys.stderr.write("%s: " % sys.argv[0]) sys.stderr.write("%s\n" % error) sys.stderr.flush() sys.exit(1) def verify_users(users): for u in users: try: pwd.getpwnam(u) except KeyError: error("User %s does not exist" % u) def chcat_user_add(newcat, users): errors = 0 logins = seobject.loginRecords() seusers = logins.get_all() add_ind = 0 verify_users(users) for u in users: if u in seusers.keys(): user = seusers[u] else: add_ind = 1 user = seusers["__default__"] serange = user[1].split("-") cats = [] top = ["s0"] if len(serange) > 1: top = serange[1].split(":") if len(top) > 1: cats.append(top[1]) cats = expandCats(cats) for i in newcat[1:]: if i not in cats: cats.append(i) if len(cats) > 0: new_serange = "%s-%s:%s" % (serange[0], top[0], ",".join(cats)) else: new_serange = "%s-%s" % (serange[0], top[0]) if add_ind: cmd = "semanage login -a -r %s -s %s %s" % (new_serange, user[0], u) else: cmd = "semanage login -m -r %s -s %s %s" % (new_serange, user[0], u) rc = getstatusoutput(cmd) if rc[0] != 0: print(rc[1]) errors += 1 return errors def chcat_add(orig, newcat, objects, login_ind): if len(newcat) == 1: raise ValueError(_("Requires at least one category")) if login_ind == 1: return chcat_user_add(newcat, objects) errors = 0 sensitivity = newcat[0] cat = newcat[1] cmd = 'chcon -l %s' % sensitivity for f in objects: (rc, c) = selinux.getfilecon(f) con = c.split(":")[3:] clist = translate(con) if sensitivity != clist[0]: print(_("Can not modify sensitivity levels using '+' on %s") % f) if len(clist) > 1: if cat in clist[1:]: print(_("%s is already in %s") % (f, orig)) continue clist.append(cat) cats = clist[1:] cats.sort() cat_string = cats[0] for c in cats[1:]: cat_string = "%s,%s" % (cat_string, c) else: cat_string = cat cmd = 'chcon -l %s:%s %s' % (sensitivity, cat_string, f) rc = getstatusoutput(cmd) if rc[0] != 0: print(rc[1]) errors += 1 return errors def chcat_user_remove(newcat, users): errors = 0 logins = seobject.loginRecords() seusers = logins.get_all() add_ind = 0 verify_users(users) for u in users: if u in seusers.keys(): user = seusers[u] else: add_ind = 1 user = seusers["__default__"] serange = user[1].split("-") cats = [] top = ["s0"] if len(serange) > 1: top = serange[1].split(":") if len(top) > 1: cats.append(top[1]) cats = expandCats(cats) for i in newcat[1:]: if i in cats: cats.remove(i) if len(cats) > 0: new_serange = "%s-%s:%s" % (serange[0], top[0], ",".join(cats)) else: new_serange = "%s-%s" % (serange[0], top[0]) if add_ind: cmd = "semanage login -a -r %s -s %s %s" % (new_serange, user[0], u) else: cmd = "semanage login -m -r %s -s %s %s" % (new_serange, user[0], u) rc = getstatusoutput(cmd) if rc[0] != 0: print(rc[1]) errors += 1 return errors def chcat_remove(orig, newcat, objects, login_ind): if len(newcat) == 1: raise ValueError(_("Requires at least one category")) if login_ind == 1: return chcat_user_remove(newcat, objects) errors = 0 sensitivity = newcat[0] cat = newcat[1] for f in objects: (rc, c) = selinux.getfilecon(f) con = c.split(":")[3:] clist = translate(con) if sensitivity != clist[0]: print(_("Can not modify sensitivity levels using '+' on %s") % f) continue if len(clist) > 1: if cat not in clist[1:]: print(_("%s is not in %s") % (f, orig)) continue clist.remove(cat) if len(clist) > 1: cat = clist[1] for c in clist[2:]: cat = "%s,%s" % (cat, c) else: cat = "" else: print(_("%s is not in %s") % (f, orig)) continue if len(cat) == 0: cmd = 'chcon -l %s %s' % (sensitivity, f) else: cmd = 'chcon -l %s:%s %s' % (sensitivity, cat, f) rc = getstatusoutput(cmd) if rc[0] != 0: print(rc[1]) errors += 1 return errors def chcat_user_replace(newcat, users): errors = 0 logins = seobject.loginRecords() seusers = logins.get_all() add_ind = 0 verify_users(users) for u in users: if u in seusers.keys(): user = seusers[u] else: add_ind = 1 user = seusers["__default__"] serange = user[1].split("-") new_serange = "%s-%s:%s" % (serange[0], newcat[0], string.join(newcat[1:], ",")) if new_serange[-1:] == ":": new_serange = new_serange[:-1] if add_ind: cmd = "semanage login -a -r %s -s %s %s" % (new_serange, user[0], u) else: cmd = "semanage login -m -r %s -s %s %s" % (new_serange, user[0], u) rc = getstatusoutput(cmd) if rc[0] != 0: print(rc[1]) errors += 1 return errors def chcat_replace(newcat, objects, login_ind): if login_ind == 1: return chcat_user_replace(newcat, objects) errors = 0 if len(newcat) == 1: sensitivity = newcat[0] cmd = 'chcon -l %s ' % newcat[0] else: sensitivity = newcat[0] cmd = 'chcon -l %s:%s' % (sensitivity, newcat[1]) for cat in newcat[2:]: cmd = '%s,%s' % (cmd, cat) for f in objects: cmd = "%s %s" % (cmd, f) rc = getstatusoutput(cmd) if rc[0] != 0: print(rc[1]) errors += 1 return errors def check_replace(cats): plus_ind = 0 replace_ind = 0 for c in cats: if len(c) > 0 and (c[0] == "+" or c[0] == "-"): if replace_ind: raise ValueError(_("Can not combine +/- with other types of categories")) plus_ind = 1 else: replace_ind = 1 if plus_ind: raise ValueError(_("Can not combine +/- with other types of categories")) return replace_ind def isSensitivity(sensitivity): if sensitivity[0] == "s" and sensitivity[1:].isdigit() and int(sensitivity[1:]) in range(0, 16): return 1 else: return 0 def expandCats(cats): newcats = [] for c in cats: for i in c.split(","): if i.find(".") != -1: j = i.split(".") for k in range(int(j[0][1:]), int(j[1][1:]) + 1): x = ("c%d" % k) if x not in newcats: newcats.append(x) else: if i not in newcats: newcats.append(i) if len(newcats) > 25: return cats return newcats def translate(cats): newcat = [] if len(cats) == 0: newcat.append("s0") return newcat for c in cats: (rc, raw) = selinux.selinux_trans_to_raw_context("a:b:c:%s" % c) rlist = raw.split(":")[3:] tlist = [] if isSensitivity(rlist[0]) == 0: tlist.append("s0") for i in expandCats(rlist): tlist.append(i) else: tlist.append(rlist[0]) for i in expandCats(rlist[1:]): tlist.append(i) if len(newcat) == 0: newcat.append(tlist[0]) else: if newcat[0] != tlist[0]: raise ValueError(_("Can not have multiple sensitivities")) for i in tlist[1:]: newcat.append(i) return newcat def usage(): print(_("Usage %s CATEGORY File ...") % sys.argv[0]) print(_("Usage %s -l CATEGORY user ...") % sys.argv[0]) print(_("Usage %s [[+|-]CATEGORY],...] File ...") % sys.argv[0]) print(_("Usage %s -l [[+|-]CATEGORY],...] user ...") % sys.argv[0]) print(_("Usage %s -d File ...") % sys.argv[0]) print(_("Usage %s -l -d user ...") % sys.argv[0]) print(_("Usage %s -L") % sys.argv[0]) print(_("Usage %s -L -l user") % sys.argv[0]) print(_("Use -- to end option list. For example")) print(_("chcat -- -CompanyConfidential /docs/businessplan.odt")) print(_("chcat -l +CompanyConfidential juser")) sys.exit(1) def listcats(): fd = open(selinux.selinux_translations_path()) for l in fd.read().split("\n"): if l.startswith("#"): continue if l.find("=") != -1: rec = l.split("=") print("%-30s %s" % tuple(rec)) fd.close() return 0 def listusercats(users): if len(users) == 0: try: users.append(os.getlogin()) except: users.append(pwd.getpwuid(os.getuid()).pw_name) verify_users(users) for u in users: cats = seobject.translate(selinux.getseuserbyname(u)[2]) cats = cats.split("-") if len(cats) > 1 and cats[1] != "s0": print("%s: %s" % (u, cats[1])) else: print("%s: %s" % (u, cats[0])) def error(msg): print("%s: %s" % (sys.argv[0], msg)) sys.exit(1) if __name__ == '__main__': if selinux.is_selinux_mls_enabled() != 1: error("Requires a mls enabled system") if selinux.is_selinux_enabled() != 1: error("Requires an SELinux enabled system") delete_ind = 0 list_ind = 0 login_ind = 0 try: gopts, cmds = getopt.getopt(sys.argv[1:], 'dhlL', ['list', 'login', 'help', 'delete']) for o, a in gopts: if o == "-h" or o == "--help": usage() if o == "-d" or o == "--delete": delete_ind = 1 if o == "-L" or o == "--list": list_ind = 1 if o == "-l" or o == "--login": login_ind = 1 if list_ind == 0 and len(cmds) < 1: usage() except getopt.error as error: errorExit(_("Options Error %s ") % error.msg) except ValueError as e: usage() if delete_ind: sys.exit(chcat_replace(["s0"], cmds, login_ind)) if list_ind: if login_ind: sys.exit(listusercats(cmds)) else: if len(cmds) > 0: usage() sys.exit(listcats()) if len(cmds) < 2: usage() set_ind = 0 cats = cmds[0].split(",") mod_ind = 0 errors = 0 objects = cmds[1:] try: if check_replace(cats): errors = chcat_replace(translate(cats), objects, login_ind) else: for c in cats: l = [] l.append(c[1:]) if len(c) > 0 and c[0] == "+": errors += chcat_add(c[1:], translate(l), objects, login_ind) continue if len(c) > 0 and c[0] == "-": errors += chcat_remove(c[1:], translate(l), objects, login_ind) continue except ValueError as e: error(e) except OSError as e: error(e) sys.exit(errors)
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