added unittest for CryptoBoxLogger and CryptoBoxProps
fixed bug in devicename check minor improvements
This commit is contained in:
parent
07a63dbd9c
commit
a0ce824eb2
3 changed files with 221 additions and 42 deletions
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@ -14,6 +14,7 @@ import re
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import os
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import sys
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import types
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import unittest
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CONF_LOCATIONS = [
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@ -32,9 +33,10 @@ class CryptoBoxProps:
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def __init__(self, conf_file=None):
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'''read config and fill class variables'''
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if os.geteuid() != 0:
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sys.stderr.write("You need to be root to run this program!\n")
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sys.exit(1)
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"enable it again - or remove the priv-dropping"
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#if os.geteuid() != 0:
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# sys.stderr.write("You need to be root to run this program!\n")
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# sys.exit(1)
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if conf_file == None:
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for f in CONF_LOCATIONS:
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if os.path.exists(os.path.expanduser(f)):
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@ -53,18 +55,18 @@ class CryptoBoxProps:
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self.cbxPrefs["Main"]["DataDir"],
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self.cbxPrefs["Main"]["NameDatabase"])
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if os.path.exists(nameDB_file):
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self.nameDB = configobj.ConfigObj(nameDB_file, create_empty=True)
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else:
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self.nameDB = configobj.ConfigObj(nameDB_file)
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else:
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self.nameDB = configobj.ConfigObj(nameDB_file, create_empty=True)
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except SyntaxError:
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sys.stderr.write("Error during parsing of name database file (%s).\n" % (nameDB_file, ))
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sys.exit(1)
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self.__cboxUID = int(self.cbxPrefs["System"]["User"])
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self.__cboxGID = int(self.cbxPrefs["System"]["Group"])
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self.debug = CryptoBoxLogger.CryptoBoxLogger(
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self.cbxPrefs["Log"]["Level"],
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self.cbxPrefs["Log"]["Facility"],
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self.cbxPrefs["Log"]["Destination"],
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self.__cboxUID)
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self.cbxPrefs["Log"]["Destination"])
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self.dropPrivileges()
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self.debugMessage = self.debug.printMessage
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self.containers = []
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@ -79,7 +81,9 @@ class CryptoBoxProps:
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allowed = self.cbxPrefs["Main"]["AllowedDevices"]
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if type(allowed) == types.StringType: allowed = [allowed]
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for a_dev in allowed:
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if a_dev and re.search('^' + a_dev, devicename): return True
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"remove double dots and so on ..."
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real_device = os.path.realpath(devicename)
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if a_dev and re.search('^' + a_dev, real_device): return True
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return False
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@ -129,16 +133,20 @@ class CryptoBoxProps:
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def dropPrivileges(self):
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"change the effective uid to 'User' specified in section 'System'"
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if os.getuid() != os.geteuid():
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raise "PrivilegeManager", "we already dropped privileges"
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"enable it again - or remove the priv-dropping"
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#if os.getuid() != os.geteuid():
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# raise "PrivilegeManager", "we already dropped privileges"
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os.seteuid(self.__cboxUID)
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os.setegid(self.__cboxGID)
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def risePrivileges(self):
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"regain superuser privileges temporarily - call dropPrivileges afterwards!"
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if os.getuid() == os.geteuid():
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raise "PrivilegeManager", "we already have superuser privileges"
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"enable it again - or remove the priv-dropping"
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#if os.getuid() == os.geteuid():
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# raise "PrivilegeManager", "we already have superuser privileges"
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os.seteuid(os.getuid())
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os.setegid(os.getgid())
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""" ************ internal stuff starts here *********** """
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@ -238,3 +246,66 @@ class CryptoBoxProps:
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return []
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# *************** test class *********************
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class CryptoBoxPropsTest(unittest.TestCase):
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configFile = "/tmp/cbox-test.conf"
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nameDBFile = "/tmp/cryptobox_names.db"
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logFile = "/tmp/cryptobox.log"
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configContent = """
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[Main]
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AllowedDevices = /dev/loop
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DefaultVolumePrefix = "Data "
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DataDir = /tmp
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NameDatabase = cryptobox_names.db
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[System]
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User = 1000
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Group = 1000
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MountParentDir = /tmp/mnt
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DefaultCipher = aes-cbc-essiv:sha256
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[Log]
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Level = debug
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Facility = file
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Destination = /tmp/cryptobox.log
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"""
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def setUp(self):
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if not os.path.exists("/tmp/mnt"): os.mkdir("/tmp/mnt")
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fd = open(self.configFile, "w")
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fd.write(self.configContent)
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fd.close()
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def tearDown(self):
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if os.path.exists("/tmp/mnt"): os.rmdir("/tmp/mnt")
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if os.path.exists(self.configFile): os.remove(self.configFile)
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if os.path.exists(self.logFile): os.remove(self.logFile)
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if os.path.exists(self.nameDBFile): os.remove(self.nameDBFile)
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def testConfigFile(self):
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self.assertRaises(KeyError, CryptoBoxProps, "/not/existing/path")
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CryptoBoxProps(self.configFile)
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self.assertTrue(os.path.exists(self.nameDBFile))
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self.assertTrue(os.path.exists(self.logFile))
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def testDeviceCheck(self):
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cb = CryptoBoxProps(self.configFile)
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self.assertTrue(cb.isDeviceAllowed("/dev/loop"))
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self.assertTrue(cb.isDeviceAllowed("/dev/loop1"))
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self.assertTrue(cb.isDeviceAllowed("/dev/loop/urgd"))
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self.assertFalse(cb.isDeviceAllowed("/dev/hda"))
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self.assertFalse(cb.isDeviceAllowed("/dev/loopa/../hda"))
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self.assertTrue(cb.isDeviceAllowed("/dev/usb/../loop1"))
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self.assertFalse(cb.isDeviceAllowed("/"))
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"a lot of tests are still missing - how can we provide a prepared environment?"
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# ********************* run unittest ****************************
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if __name__ == "__main__":
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unittest.main()
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@ -3,48 +3,69 @@ manages logging events of the CryptoBox
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'''
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import sys
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import os
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import unittest
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class CryptoBoxLogger:
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'''
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handles concrete logging events and prints them e.g. to a logfile
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handles logging events and prints them e.g. to a logfile
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'''
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DebugLevels = {"debug":0, "info":3, "warn":6, "error":9}
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DebugFacilities = {"file":0}
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def __init__(self, level, facility, name=None, user=None):
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def __init__(self, level, facility, destination=None):
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"""create a CryptoBoxLogger object and connect it to an output facility
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level: an integer (0..9) or string ('debug', 'info', 'warn' or 'error')
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facility: for now only 'file'
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destination: e.g. the name of the logfile or syslog facility
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"""
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try:
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try:
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facility = int(facility)
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except ValueError:
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except Exception:
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try:
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facility = self.DebugFacilities[facility]
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except KeyError:
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raise "LoggerError"
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if (facility != 0): raise "LoggerError"
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except "LoggerError":
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errorMsg = "Invalid debug facility: %s" % facility
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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try:
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try:
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level = int(level)
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except ValueError:
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except Exception:
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try:
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level = self.DebugLevels[level]
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except KeyError:
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raise "LoggerError"
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if (level < 0) or (level > 9): raise "LoggerError"
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except "LoggerError":
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errorMsg = "Invalid debug level: %s" % level
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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self.debug_level = level
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if facility == self.DebugFacilities["file"]:
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self.logFunc = self.message2file
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if name is not None:
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self.logFile = name
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if destination is not None:
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self.logFile = destination
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else:
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self.logFile = '/var/log/cryptobox.log'
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try:
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fsock = open(self.logFile, "a")
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fsock.close()
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# TODO: check before, if this file was owned
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# by someone else than the cryptobox user - in this case,
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# we may not chown it - very baaaad!
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"change ownership of log file"
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if user != None:
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os.chown(self.logFile, user, os.getegid())
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return
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except IOError:
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sys.stderr.write("Unable to open logfile (%s) for writing.\n" % (self.logFile, ))
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errorMsg ="Unable to open logfile (%s) for writing." % (self.logFile,)
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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else:
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sys.stderr.write("Invalid logging facility: %d.\n" % (facility, ))
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"we will only arrive here, if an error occoured"
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sys.stderr.write("Sorry - bye, bye!\n")
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sys.exit(1)
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errorMsg = "Invalid logging facility: %d." % (facility, )
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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def printMessage(self, msg_level, text):
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@ -53,7 +74,20 @@ class CryptoBoxLogger:
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try:
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msg_level = int(msg_level)
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except ValueError:
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try:
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msg_level = self.DebugLevels[msg_level]
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except KeyError:
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errorMsg = "Invalid debug level: %s" % msg_level
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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if (msg_level < 0) or (msg_level > 9):
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errorMsg = "Invalid debug level: %s" % msg_level
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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if text is None:
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errorMsg = "Empty debug message - this is not allowed"
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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if msg_level >= self.debug_level:
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self.logFunc("[CryptoBox] - %s\n" % (text, ))
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@ -66,12 +100,85 @@ class CryptoBoxLogger:
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log_sock.close()
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return
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except IOError:
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sys.stderr.write(
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"Unable to write messages to logfile (%s).\n" % (self.logFile, ))
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errorMsg = "Unable to write messages to logfile (%s)." % (self.logFile, )
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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except IOError:
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sys.stderr.write("Unable to open logfile (%s) for writing.\n" % (self.logFile, ))
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"we will only arrive here, if an error occoured"
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sys.stderr.write("Sorry - bye, bye!\n")
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sys.exit(1)
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errorMsg = "Unable to open logfile (%s) for writing." % (self.logFile, )
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sys.stderr.write(errorMsg + "\n")
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raise "LoggerError", errorMsg
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# ********************* test class **********************
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class CryptoBoxLoggerTest(unittest.TestCase):
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logFile = "/tmp/cbox-test.log"
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def setUp(self):
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if os.path.exists(self.logFile): os.remove(self.logFile)
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def tearDown(self):
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if os.path.exists(self.logFile): os.remove(self.logFile)
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def testInit(self):
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try:
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CryptoBoxLogger(0, 0)
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except "LoggerError":
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CryptoBoxLogger(0, 0, self.logFile)
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os.remove(self.logFile)
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CryptoBoxLogger("info", "file", self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, "invalid", 0, self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, 0, "invalid", self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, 10, 0, self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, -1, 0, self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, 0, 10, self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, 0, -1, self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, None, 0, self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, 0, None, self.logFile)
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self.assertRaises("LoggerError", CryptoBoxLogger, 0, 0, "/no/existing/path")
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os.remove(self.logFile)
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def testMessage(self):
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cb = CryptoBoxLogger(3, 0, self.logFile)
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content1 = self.readFile()
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self.assertEquals(content1, "")
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cb.printMessage(3, "Ausgabe")
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content2 = self.readFile()
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self.assertNotEqual(content1, content2)
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self.assertRaises("LoggerError", cb.printMessage, 10, "Ausgabe")
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self.assertEquals(content2, self.readFile())
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self.assertRaises("LoggerError", cb.printMessage, -1, "Ausgabe")
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self.assertEquals(content2, self.readFile())
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self.assertRaises("LoggerError", cb.printMessage, "invalid", "Ausgabe")
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self.assertEquals(content2, self.readFile())
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self.assertRaises("LoggerError", cb.printMessage, 3, None)
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self.assertEquals(content2, self.readFile())
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cb.printMessage(2, "Ausgabe")
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self.assertEquals(content2, self.readFile())
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cb.printMessage(4, "Ausgabe")
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self.assertNotEqual(content2, self.readFile())
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os.remove(self.logFile)
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def readFile(self):
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fd = None
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try:
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fd = open(self.logFile, "r")
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text = fd.read()
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fd.close()
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except IOError:
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if fd is not None: fd.close()
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text = None
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return text
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# *************** unit testing *********************
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if __name__ == "__main__":
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try:
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devnull = open(os.devnull, "w")
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sys.stderr = devnull
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except IOError:
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pass
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unittest.main()
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@ -19,8 +19,9 @@ NameDatabase = cryptobox_names.db
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[System]
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# most actions of the cryptobox are not executed as root - choose a limited
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# user here - for now only numeric ids are allowed
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# user and group here - for now only numeric ids are allowed
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User = 1000
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Group = 1000
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# where should we mount volumes?
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# this directory must be writeable by the cryptobox user (see above)
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