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#!/usr/bin/python
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from fuse import Fuse
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import fuse
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import ConfigParser
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import sys
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import logging
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import os
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import errno
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# ToDo replace with ikarus
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#import pyclamav
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import subprocess
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import urllib3
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MINOPTS = { "Main" : ["Logfile", "Mountpoint", "Rootpath", "LocalScanserverURL", "RemoteScanserverURL", "ReadOnly"]}
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CONFIG_NOT_READABLE = "Configfile is not readable"
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CONFIG_WRONG = "Something is wrong with the config"
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CONFIG_MISSING = "Section: \"%s\" Option: \"%s\" in configfile is missing"
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LOG = None
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LOCAL_SCANSERVER_URL = ""
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REMOTE_SCANSERVER_URL = ""
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STATUS_CODE_OK = 200
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STATUS_CODE_INFECTED = 210
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STATUS_CODE_NOT_FOUND = 404
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MAX_SCAN_FILE_SIZE = 50 * 0x100000
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SYSTEM_FILE_COMMAND = "file"
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# Global http pool manager used to connect to the scan server
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httpPool = urllib3.PoolManager()
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def checkMinimumOptions (config):
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for section, options in MINOPTS.iteritems ():
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for option in options:
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if (config.has_option(section, option) == False):
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print (CONFIG_MISSING % (section, option))
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exit (129)
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def printUsage ():
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print ("Usage:")
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print ("%s configfile mountpath ro/rw" % (sys.argv[0]))
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exit (128)
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def loadConfig ():
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print ("load config")
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if (len (sys.argv) < 4):
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printUsage ()
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configfile = sys.argv[1]
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config = ConfigParser.SafeConfigParser ()
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if ((os.path.exists (configfile) == False) or (os.path.isfile (configfile) == False) or (os.access (configfile, os.R_OK) == False)):
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print (CONFIG_NOT_READABLE)
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printUsage ()
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try:
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config.read (sys.argv[1])
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except Exception, e:
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print (CONFIG_WRONG)
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print ("Error: %s" % (e))
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config.set("Main", "Mountpoint", sys.argv[2])
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if (sys.argv[3] == "rw"):
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config.set("Main", "ReadOnly", "false")
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else:
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config.set("Main", "ReadOnly", "true")
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checkMinimumOptions (config)
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return config
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def initLog (config):
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print ("init log")
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global LOG
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logfile = config.get("Main", "Logfile")
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# ToDo move log level and maybe other things to config file
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logging.basicConfig(
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level = logging.DEBUG,
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format = "%(asctime)s %(name)-12s %(funcName)-15s %(levelname)-8s %(message)s",
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datefmt = "%Y-%m-%d %H:%M:%S",
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filename = logfile,
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filemode = "a+",
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)
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LOG = logging.getLogger("fuse_main")
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def fixPath (path):
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return ".%s" % (path)
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def rootPath (rootpath, path):
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return "%s%s" % (rootpath, path)
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def flag2mode (flags):
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md = {os.O_RDONLY: 'r', os.O_WRONLY: 'w', os.O_RDWR: 'w+'}
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m = md[flags & (os.O_RDONLY | os.O_WRONLY | os.O_RDWR)]
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if flags | os.O_APPEND:
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m = m.replace('w', 'a', 1)
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return m
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def scanFileIkarus (path, fileobject):
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infected = False
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LOG.debug ("Scan File: %s" % (path))
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if (os.fstat(fileobject.fileno()).st_size > MAX_SCAN_FILE_SIZE):
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LOG.info("File max size exceeded. The file is not scanned.")
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return False
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fields = { 'up_file' : (path, fileobject.read()) }
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try:
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response = httpPool.request_encode_body('POST', REMOTE_SCANSERVER_URL, fields = fields)
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# We should catch socket.error here, but this does not work. Needs checking.
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except:
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LOG.info("Remote scan server unreachable, using local scan server.")
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try:
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response = httpPool.request_encode_body('POST', LOCAL_SCANSERVER_URL, fields = fields)
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except:
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LOG.error ("Connection to local scan server could not be established.")
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LOG.error ("Exception: %s" %(sys.exc_info()[0]))
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return False
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if response.status == STATUS_CODE_OK:
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infected = False
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elif response.status == STATUS_CODE_INFECTED:
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# Parse xml for info if desired
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#contentXML = r.content
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#root = ET.fromstring(contentXML)
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#status = root[1][2].text
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infected = True
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else:
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LOG.error ("Connection error to scan server.")
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if (infected == True):
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LOG.error ("Virus found, denying access.")
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else:
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LOG.debug ("No virus found.")
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return infected
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def scanFileClamAV (path):
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infected = False
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LOG.debug ("Scan File: %s" % (path))
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# ToDo implement ikarus
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result = pyclamav.scanfile (path)
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LOG.debug ("Result of file \"%s\": %s" % (path, result))
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if (result[0] != 0):
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infected = True
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if (infected == True):
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LOG.error ("Virus found, deny Access %s" % (result,))
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return infected
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def whitelistFile (path):
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whitelisted = False;
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LOG.debug ("Execute \"%s\" command on \"%s\"" %(SYSTEM_FILE_COMMAND, path))
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result = None
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try:
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result = subprocess.check_output ([SYSTEM_FILE_COMMAND, path]);
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# ToDo replace with real whitelist
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whitelisted = True
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except Exception as e:
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LOG.error ("Call returns with an error!")
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LOG.error (e)
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LOG.debug ("Type: %s" %(result))
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return whitelisted
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class OsecFS (Fuse):
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__rootpath = None
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# default fuse init
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def __init__(self, rootpath, *args, **kw):
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self.__rootpath = rootpath
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Fuse.__init__ (self, *args, **kw)
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LOG.debug ("Init complete.")
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# defines that our working directory will be the __rootpath
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def fsinit(self):
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os.chdir (self.__rootpath)
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def getattr(self, path):
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LOG.debug ("*** getattr (%s)" % (fixPath (path)))
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return os.lstat (fixPath (path));
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def getdir(self, path):
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LOG.debug ("*** getdir (%s)" % (path));
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return os.listdir (fixPath (path))
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def readdir(self, path, offset):
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LOG.debug ("*** readdir (%s %s)" % (path, offset));
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for e in os.listdir (fixPath (path)):
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yield fuse.Direntry(e)
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def chmod (self, path, mode):
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LOG.debug ("*** chmod %s %s" % (path, oct(mode)))
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if (config.get("Main", "ReadOnly") == "true"):
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return -errno.EACCES
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ft@0
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os.chmod (fixPath (path), mode)
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ft@0
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ft@0
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def chown (self, path, uid, gid):
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LOG.debug ("*** chown %s %s %s" % (path, uid, gid))
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if (config.get("Main", "ReadOnly") == "true"):
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return -errno.EACCES
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ft@0
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os.chown (fixPath (path), uid, gid)
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def link (self, targetPath, linkPath):
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LOG.debug ("*** link %s %s" % (targetPath, linkPath))
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if (config.get("Main", "ReadOnly") == "true"):
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ft@3
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return -errno.EACCES
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ft@0
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os.link (fixPath (targetPath), fixPath (linkPath))
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ft@0
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233 |
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ft@0
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def mkdir (self, path, mode):
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LOG.debug ("*** mkdir %s %s" % (path, oct(mode)))
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if (config.get("Main", "ReadOnly") == "true"):
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ft@3
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return -errno.EACCES
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os.mkdir (fixPath (path), mode)
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def mknod (self, path, mode, dev):
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LOG.debug ("*** mknod %s %s %s" % (path, oct (mode), dev))
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if (config.get("Main", "ReadOnly") == "true"):
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return -errno.EACCES
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os.mknod (fixPath (path), mode, dev)
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# to implement virus scan
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def open (self, path, flags):
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LOG.debug ("*** open %s %s" % (path, oct (flags)))
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self.file = os.fdopen (os.open (fixPath (path), flags), flag2mode (flags))
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self.fd = self.file.fileno ()
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ck@2
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infected = scanFileIkarus (rootPath(self.__rootpath, path), self.file)
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ck@2
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#infected = scanFileClamAV (rootPath(self.__rootpath, path))
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ft@0
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254 |
if (infected == True):
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ft@0
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255 |
self.file.close ()
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ft@0
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256 |
return -errno.EACCES
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ft@0
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257 |
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ft@0
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258 |
whitelisted = whitelistFile (rootPath(self.__rootpath, path))
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ft@0
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259 |
if (whitelisted == False):
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ft@0
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260 |
self.file.close ()
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ft@0
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261 |
return -errno.EACCES
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ft@0
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262 |
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ft@0
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263 |
def read (self, path, length, offset):
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ft@0
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264 |
LOG.debug ("*** read %s %s %s" % (path, length, offset))
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ft@0
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265 |
self.file.seek (offset)
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ft@0
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return self.file.read (length)
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ft@0
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267 |
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ft@0
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268 |
def readlink (self, path):
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ft@0
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269 |
LOG.debug ("*** readlink %s" % (path))
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ft@0
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270 |
return os.readlink (fixPath (path))
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ft@0
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271 |
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ft@0
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272 |
def release (self, path, flags):
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ft@0
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273 |
LOG.debug ("*** release %s %s" % (path, oct (flags)))
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ft@0
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274 |
self.file.close ()
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ft@0
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275 |
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ft@0
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276 |
def rename (self, oldPath, newPath):
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ft@3
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277 |
LOG.debug ("*** rename %s %s %s" % (oldPath, newPath, config.get("Main", "ReadOnly")))
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ft@3
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278 |
if (config.get("Main", "ReadOnly") == "true"):
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ft@3
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279 |
return -errno.EACCES
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ft@0
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280 |
os.rename (fixPath (oldPath), fixPath (newPath))
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ft@0
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281 |
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ft@0
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282 |
def rmdir (self, path):
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ft@3
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283 |
LOG.debug ("*** rmdir %s %s" % (path, config.get("Main", "ReadOnly")))
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ft@3
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284 |
if (config.get("Main", "ReadOnly") == "true"):
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ft@3
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285 |
return -errno.EACCES
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ft@0
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286 |
os.rmdir (fixPath (path))
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ft@0
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287 |
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ft@0
|
288 |
def statfs (self):
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ft@0
|
289 |
LOG.debug ("*** statfs")
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ft@0
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290 |
return os.statvfs(".")
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ft@0
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291 |
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ft@0
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292 |
def symlink (self, targetPath, linkPath):
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ft@3
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293 |
LOG.debug ("*** symlink %s %s %s" % (targetPath, linkPath, config.get("Main", "ReadOnly")))
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ft@3
|
294 |
if (config.get("Main", "ReadOnly") == "true"):
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ft@3
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295 |
return -errno.EACCES
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ft@0
|
296 |
os.symlink (fixPath (targetPath), fixPath (linkPath))
|
|
ft@0
|
297 |
|
|
ft@0
|
298 |
def truncate (self, path, length):
|
|
ft@3
|
299 |
LOG.debug ("*** truncate %s %s %s" % (path, length, config.get("Main", "ReadOnly")))
|
|
ft@3
|
300 |
if (config.get("Main", "ReadOnly") == "true"):
|
|
ft@3
|
301 |
return -errno.EACCES
|
|
ft@0
|
302 |
f = open (fixPath (path), "a")
|
|
ft@0
|
303 |
f.truncate (length)
|
|
ft@0
|
304 |
f.close ()
|
|
ft@0
|
305 |
|
|
ft@0
|
306 |
def unlink (self, path):
|
|
ft@3
|
307 |
LOG.debug ("*** unlink %s %s" % (path, config.get("Main", "ReadOnly")))
|
|
ft@3
|
308 |
if (config.get("Main", "ReadOnly") == "true"):
|
|
ft@3
|
309 |
return -errno.EACCES
|
|
ft@0
|
310 |
os.unlink (fixPath (path))
|
|
ft@0
|
311 |
|
|
ft@0
|
312 |
def utime (self, path, times):
|
|
ft@0
|
313 |
LOG.debug ("*** utime %s %s" % (path, times))
|
|
ft@0
|
314 |
os.utime (fixPath (path), times)
|
|
ft@0
|
315 |
|
|
ft@0
|
316 |
def write (self, path, buf, offset):
|
|
ft@3
|
317 |
LOG.debug ("*** write %s %s %s %s" % (path, buf, offset, config.get("Main", "ReadOnly")))
|
|
ft@3
|
318 |
if (config.get("Main", "ReadOnly") == "true"):
|
|
ft@3
|
319 |
self.file.close()
|
|
ft@3
|
320 |
return -errno.EACCES
|
|
ft@0
|
321 |
self.file.seek (offset)
|
|
ft@0
|
322 |
self.file.write (buf)
|
|
ft@0
|
323 |
return len (buf)
|
|
ft@0
|
324 |
|
|
ft@0
|
325 |
def access (self, path, mode):
|
|
ft@0
|
326 |
LOG.debug ("*** access %s %s" % (path, oct (mode)))
|
|
ft@0
|
327 |
if not os.access (fixPath (path), mode):
|
|
ft@0
|
328 |
return -errno.EACCES
|
|
ft@0
|
329 |
|
|
ft@0
|
330 |
def create (self, path, flags, mode):
|
|
ft@3
|
331 |
LOG.debug ("*** create %s %s %s %s %s" % (fixPath (path), oct (flags), oct (mode), flag2mode (flags), config.get("Main", "ReadOnly")))
|
|
ft@3
|
332 |
if (config.get("Main", "ReadOnly") == "true"):
|
|
ft@3
|
333 |
return -errno.EACCES
|
|
ft@0
|
334 |
self.file = os.fdopen (os.open (fixPath (path), flags, mode), flag2mode (flags))
|
|
ft@0
|
335 |
self.fd = self.file.fileno ()
|
|
ft@0
|
336 |
|
|
ft@0
|
337 |
|
|
ft@0
|
338 |
if __name__ == "__main__":
|
|
ft@0
|
339 |
# Set api version
|
|
ft@0
|
340 |
fuse.fuse_python_api = (0, 2)
|
|
ft@0
|
341 |
fuse.feature_assert ('stateful_files', 'has_init')
|
|
ft@0
|
342 |
|
|
ft@0
|
343 |
config = loadConfig ()
|
|
ft@0
|
344 |
initLog (config)
|
|
ft@0
|
345 |
|
|
ck@1
|
346 |
LOCAL_SCANSERVER_URL = config.get("Main", "LocalScanserverURL")
|
|
ck@1
|
347 |
REMOTE_SCANSERVER_URL = config.get("Main", "RemoteScanserverURL")
|
|
ck@1
|
348 |
|
|
ck@5
|
349 |
# Convert file size from MB to byte
|
|
ck@5
|
350 |
MAX_SCAN_FILE_SIZE = int(config.get("Main", "MaxFileSize")) * 0x100000
|
|
ck@5
|
351 |
|
|
ft@0
|
352 |
osecfs = OsecFS (config.get ("Main", "Rootpath"))
|
|
ft@0
|
353 |
osecfs.flags = 0
|
|
ft@0
|
354 |
osecfs.multithreaded = 0
|
|
ft@0
|
355 |
|
|
ft@0
|
356 |
# osecfs.parser.add_option (mountopt=config.get("Main", "Mountpoint"),
|
|
ft@0
|
357 |
# metavar="PATH",
|
|
ft@0
|
358 |
# default=config.get("Main", "Rootpath"),
|
|
ft@0
|
359 |
# help="mirror filesystem from under PATH [default: %default]")
|
|
ft@0
|
360 |
# osecfs.parse(values=osecfs, errex=1)
|
|
ft@0
|
361 |
|
|
ft@0
|
362 |
fuse_args = [sys.argv[0], config.get ("Main", "Mountpoint")];
|
|
ft@0
|
363 |
osecfs.main (fuse_args)
|