#
# Authors: Dan Walsh <dwalsh@redhat.com>
#
# Copyright (C) 2007 Red Hat, Inc.
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
#

import gettext
_ = gettext.translation('setroubleshoot-plugins', '/usr/share/locale', fallback=True).lgettext

from setroubleshoot.util import *
from setroubleshoot.Plugin import Plugin

class plugin(Plugin):
    summary = _('''
    SELinux prevented the http daemon from $ACCESS files stored on a NFS filesytem.
    ''')
    
    problem_description = _('''
    SELinux prevented the http daemon from $ACCESS files stored on a NFS filesystem.
    NFS (Network Filesystem) is a network filesystem commonly used on Unix / Linux
    systems.
    
    The http daemon attempted to read one or more files or directories from
    a mounted filesystem of this type.  As NFS filesystems do not support
    fine-grained SELinux labeling, all files and directories in the
    filesystem will have the same security context.
    
    If you have not configured the http daemon to read files from a NFS filesystem
    this access attempt could signal an intrusion attempt.
    ''')
    
    fix_description = _('''
    Changing the "$BOOLEAN" boolean to true will allow this access:
    "setsebool -P $BOOLEAN=1."
    ''')
    
    fix_cmd = 'setsebool -P $BOOLEAN=1'
    
    def __init__(self):
        Plugin.__init__(self, __name__)

    def analyze(self, avc):
        if avc.matches_source_types(['httpd_t'])           and \
           avc.matches_target_types(['nfs_t'])             and \
           avc.all_accesses_are_in(avc.create_file_perms)  and \
           avc.has_tclass_in(['file', 'dir']):
            # MATCH
            avc.set_template_substitutions(BOOLEAN="httpd_use_nfs", ACCESS="reading")
            return self.report(avc, _("Web Server"),
                               self.summary, self.problem_description,
                               self.fix_description, self.fix_cmd)

        return None