logging cleaned up
unified errorExit function instead of explicite sys.exit calls add config_file argument to CryptoBoxProps add getCapacity method to CryptoBoxContainer removed "classes.txt"
This commit is contained in:
parent
bb16749b81
commit
707fb71476
5 changed files with 168 additions and 85 deletions
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@ -5,9 +5,6 @@ This is the web interface for a fileserver managing encrypted filesystems.
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It was originally written in bash/perl. Now a complete rewrite is in
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progress. So things might be confusing here. Hopefully not for long.
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:)
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TODO: replace all "sys.exit"-calls by a unified handler
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'''
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# check python version
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@ -30,7 +27,6 @@ CONF_LOCATIONS = [
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"~/.cryptobox.conf",
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"/etc/cryptobox/cryptobox.conf"]
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SUDO_WRAPPER = ["sudo", "/home/lars/subversion/cryptobox/branches/pythonrewrite/bin2/CryptoBoxRootActions.py"]
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class CryptoBox:
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'''this class rules them all!
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@ -56,24 +52,22 @@ class CryptoBox:
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to the configured destination'''
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## basicConfig(...) needs python >= 2.4
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try:
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logging.basicConfig(
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format='%(asctime)s %(module)s %(levelname)s %(message)s',
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stream = sys.stderr)
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self.log = logging.getLogger("CryptoBox")
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self.log.setLevel(logging.INFO)
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logging.basicConfig(
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format='%(asctime)s %(module)s %(levelname)s %(message)s',
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stderr=sys.stderr)
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self.log.setLevel(logging.ERROR)
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self.log.info("loggingsystem is up'n running")
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## from now on everything can be logged via self.log...
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except:
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sys.stderr.write("Something with the loggingsystem went wrong. I give up.")
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sys.exit(1)
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sys.errorExit("SystemError","Something with the loggingsystem went wrong. I give up.")
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def __initPreferences(self, config_file):
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try:
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import configobj ## needed for reading and writing of the config file
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except:
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self.log.error("Could't import 'configobj'! Try 'apt-get install python-configobj'.")
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sys.exit(1)
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self.errorExit("SystemError", "Could't import 'configobj'! Try 'apt-get install python-configobj'.")
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# search for the configuration file
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if config_file is None:
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# no config file was specified - we will look for it in the ususal locations
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@ -82,57 +76,56 @@ class CryptoBox:
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if os.path.exists(os.path.expanduser(f))]
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if not conf_file_list:
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# no possible config file found in the usual locations
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self.log.error("No configuration file found - sorry!")
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sys.exit(1)
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self.errorExit("ConfigError", "No configuration file found - sorry!")
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config_file = conf_file_list[0]
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else:
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# a config file was specified (e.g. via command line)
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if type(config_file) != types.StringType:
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self.errorExit("ConfigError","Invalid config file specified: %s" % config_file)
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if not os.path.exists(config_file):
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self.log.error("Could not find the specified configuration file (%s)" % config_file)
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sys.exit(1)
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self.errorExit("ConfigError","Could not find the specified configuration file (%s)" % config_file)
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try:
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self.cbxPrefs = configobj.ConfigObj(config_file)
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if self.cbxPrefs:
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self.log.info("found config: %s" % self.cbxPrefs.items())
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else:
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FileNotFound = "could not find %s" % config_file
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raise FileNotFound
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except FileNotFound:
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self.log.error(FileNotFound)
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sys.exit(1)
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self.errorExit("ConfigError","failed to load the config file: %s" % config_file)
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except IOError:
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self.errorExit("ConfigError","unable to open the config file: %s" % config_file)
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try:
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nameDB_file = os.path.join(
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self.cbxPrefs["Main"]["DataDir"],
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self.cbxPrefs["Main"]["NameDatabase"])
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try:
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nameDB_file = os.path.join(
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self.cbxPrefs["Main"]["DataDir"],
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self.cbxPrefs["Main"]["NameDatabase"])
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except KeyError:
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self.errorExit("ConfigError","could not find one of these configuration settings: [Main]->DataDir and [Main]->NameDatabase - please check your config file(%s)" % config_file)
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if os.path.exists(nameDB_file):
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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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self.log.error("Error during parsing of name database file (%s).\n" % (nameDB_file, ))
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sys.exit(1)
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self.errorExit("ConfigError","Error during parsing of name database file (%s).\n" % (nameDB_file, ))
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# TODO: check if nameDB file was created successfully?
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# get the loglevel
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try:
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log_level = self.cbxPrefs["Log"]["Level"].upper()
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log_level_avail = ["DEBUG", "INFO", "WARN", "ERROR"]
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#if not log_level in ["DEBUG", "INFO", "WARN", "ERROR"]:
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if not log_level in log_level_avail:
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self.log.error("invalid log level: %s is not in %s" % (self.cbxPrefs["Log"]["Level"], log_level_avail))
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sys.exit(1)
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self.errorExit("ConfigError","invalid log level: %s is not in %s" % (self.cbxPrefs["Log"]["Level"], log_level_avail))
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except TypeError:
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self.log.error("invalid log level: %s" % self.cbxPrefs["Log"]["Level"])
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sys.exit(1)
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self.errorExit("ConfigError","invalid log level: %s" % self.cbxPrefs["Log"]["Level"])
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try:
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new_handler = logging.FileHandler(self.cbxPrefs["Log"]["Details"])
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# TODO: loglevel doesn't change after first initialisation
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new_handler.setLevel(getattr(logging, log_level))
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# TODO: this formatter does not work for now
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new_handler.setFormatter = '%(asctime)s %(module)s %(levelname)s %(message)s'
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try:
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new_handler = logging.FileHandler(self.cbxPrefs["Log"]["Details"])
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except KeyError:
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self.errorExit("ConfigError","could not find a configuration setting: [Log]->Details - please check your config file(%s)" % config_file)
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new_handler.setFormatter(logging.Formatter('%(asctime)s %(module)s %(levelname)s: %(message)s'))
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self.log.addHandler(new_handler)
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# do not call parent's handlers
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self.log.propagate = False
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self.log.setLevel(getattr(logging,log_level))
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except IOError:
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self.log.error("could not open logfile: %s" % self.cbxPrefs["Log"]["Details"])
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sys.exit(1)
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self.errorExit("ConfigError","could not open logfile: %s" % self.cbxPrefs["Log"]["Details"])
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# do some initial checks
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@ -140,8 +133,7 @@ class CryptoBox:
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try:
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devnull = open(os.devnull, "w")
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except IOError:
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self.log.error("Could not open %s for writing!" % os.devnull)
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sys.exit(1)
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self.errorExit("SystemError","Could not open %s for writing!" % os.devnull)
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try:
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proc = subprocess.Popen(
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shell = False,
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@ -151,17 +143,37 @@ class CryptoBox:
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self.cbxPrefs["Programs"]["CryptoBoxRootActions"],
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"check"])
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except OSError:
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self.log.error("could not find: %s" % self.cbxPrefs["Programs"]["super"])
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sys.exit(1)
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self.errorExit("ConfigError","could not find: %s" % self.cbxPrefs["Programs"]["super"])
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proc.wait()
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if proc.returncode != 0:
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self.log.error("Could not call CryptoBoxRootActions by 'super' - maybe you did not add the appropriate line to /etc/super.tab?")
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sys.exit(1)
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self.errorExit("ConfigError","Could not call CryptoBoxRootActions by 'super' - maybe you did not add the appropriate line to /etc/super.tab?")
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# this method just demonstrates inheritance effects - may be removed
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def cbx_inheritance_test(self, string="you lucky widow"):
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self.log.info(string)
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def errorExitMod(self, title, msg, code=1):
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"""output an error message and quit by raising an exception
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this function should be used if this class was used as a module instead
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of as a standalone program
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"""
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self.log.error(msg)
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raise title, msg
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def errorExitProg(self, title, msg, code=1):
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"""output an error message and quit by calling sys.exit
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this function should be used if this class was used as a standalone
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program
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"""
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self.log.error(msg)
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sys.exit(code)
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# RFC: why should CryptoBoxProps inherit CryptoBox? [l]
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@ -173,9 +185,9 @@ class CryptoBoxProps(CryptoBox):
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All properties of the cryptobox can be accessed by this class.
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'''
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def __init__(self):
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def __init__(self, config_file=None):
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'''read config and fill class variables'''
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CryptoBox.__init__(self)
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CryptoBox.__init__(self, config_file)
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#self.cbx_inheritance_test()
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#print self.cbxPrefs.items()
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@ -186,6 +198,7 @@ class CryptoBoxProps(CryptoBox):
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if self.isDeviceAllowed(device):
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self.containers.append(CryptoBoxContainer.CryptoBoxContainer(device, self))
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def isDeviceAllowed(self, devicename):
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"check if a device is white-listed for being used as cryptobox containers"
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allowed = self.cbxPrefs["Main"]["AllowedDevices"]
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@ -336,6 +349,11 @@ class CryptoBoxProps(CryptoBox):
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except OSError:
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return []
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# choose an exit function
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if __name__ == "__main__":
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CryptoBox.errorExit = CryptoBox.errorExitProg
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else:
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CryptoBox.errorExit = CryptoBox.errorExitMod
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if __name__ == "__main__":
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cb = CryptoBox()
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@ -83,6 +83,19 @@ class CryptoBoxContainer:
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def isMounted(self):
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return os.path.ismount(self.__getMountPoint())
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def getCapacity(self):
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"""return the current capacity state of the volume
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the result is a tuple of values in megabyte:
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(size, available, used)
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"""
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info = os.statvfs(self.__getMountPoint())
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return (
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int(info.f_bsize*info.f_blocks/1024/1024),
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int(info.f_bsize*info.f_bavail/1024/1024),
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int(info.f_bsize*(info.f_blocks-info.f_bavail)/1024/1024))
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def create(self, type, password=None):
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@ -1,6 +0,0 @@
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this is the future plan for the cbx python classes, you can find the actual classes under ./doc (generated by happydoc)
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Classes and Methods:
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CryptoBoxContainer
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getCapacity
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@ -44,6 +44,12 @@ def main():
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" ***************** some functions ******************** "
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def luks_tests(e):
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# umount if necessary
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try:
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e.umount()
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except "MountError":
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pass
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e.create(e.Types["luks"], "alt")
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print "\tluks create:\tok"
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@ -60,6 +66,8 @@ def luks_tests(e):
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if e.isMounted(): print "\tluks mount:\tok"
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else: print "\tluks mount:\tfailed"
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print "\tCapacity (size, free, used) [MB]:\t%s" % (e.getCapacity(), )
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try:
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e.umount()
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except "MountError":
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@ -72,6 +80,12 @@ def luks_tests(e):
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def plain_tests(e):
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# umount if necessary
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try:
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e.umount()
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except "MountError":
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pass
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e.create(e.Types["plain"])
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print "\tplain create:\tok"
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@ -85,6 +99,8 @@ def plain_tests(e):
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if e.isMounted(): print "\tplain mount:\tok"
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else: print "\tplain mount:\tfailed"
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print "\tCapacity (size, free, used) [MB]:\t%s" % (e.getCapacity(), )
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try:
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e.umount()
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except "MountError":
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@ -14,7 +14,7 @@ class CryptoBoxPropsDeviceTests(unittest.TestCase):
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self.assertTrue(self.cb.isDeviceAllowed("/dev/usb/../loop1"))
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def testDeniedDevices(self):
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'''isDeviceAllowed should fail with not explecitly allowed devices'''
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'''isDeviceAllowed should fail with not explicitly allowed devices'''
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self.assertFalse(self.cb.isDeviceAllowed("/dev/hda"))
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self.assertFalse(self.cb.isDeviceAllowed("/dev/loopa/../hda"))
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self.assertFalse(self.cb.isDeviceAllowed("/"))
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@ -22,56 +22,98 @@ class CryptoBoxPropsDeviceTests(unittest.TestCase):
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class CryptoBoxPropsConfigTests(unittest.TestCase):
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'''test here if everything with the config turns right'''
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import filehandling
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import os
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import CryptoBox
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files = { "configFile" : "cbox-test.conf",
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"nameDBFile" : "cryptobox_names.db",
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"logFile" : "cryptobox.log",
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"tmpdir" : "cryptobox-mnt" }
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files = {
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"configFileOK" : "cbox-test_ok.conf",
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"configFileBroken" : "cbox-test_broken.conf",
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"nameDBFile" : "cryptobox_names.db",
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"logFile" : "cryptobox.log",
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"tmpdir" : "cryptobox-mnt" }
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tmpdirname = ""
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filenames = {}
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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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[Programs]
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blkid = /sbin/blkid
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cryptsetup = /sbin/cryptsetup
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"""
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configContentOK = """
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[Main]
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AllowedDevices = /dev/loop
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DefaultVolumePrefix = "Data "
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DataDir = %s
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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 = %s/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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Destination = file
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#Details = %s/cryptobox.log
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Details = /tmp/cryptobox.log
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[Programs]
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blkid = /sbin/blkid
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cryptsetup = /sbin/cryptsetup
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super = /usr/bin/super
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CryptoBoxRootActions = CryptoBoxRootActions"""
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configContentBroken = """
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[Main]
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AllowedDevices = /dev/loop
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DefaultVolumePrefix = "Data "
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#DataDir = %s
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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 = %s/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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Destination = file
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#Details = %s/cryptobox.log
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Details = /tmp/cryptobox.log
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[Programs]
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blkid = /sbin/blkid
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cryptsetup = /sbin/cryptsetup
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super = /usr/bin/super
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CryptoBoxRootActions = CryptoBoxRootActions"""
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def setUp(self):
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'''generate all files in tmp and remember the names'''
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import tempfile
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os = self.os
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self.tmpdirname = self.filehandling.gen_temp_dir(self.files["tmpdir"])
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os.chdir(self.tmpdirname)
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self.tmpdirname = tempfile.mkdtemp(prefix="cbox-")
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for file in self.files.keys():
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#TODO: files are not really created in tmpdirname
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self.filenames[file] = self.filehandling.gen_temp_file(self.files[file])
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self.filenames[file] = os.path.join(self.tmpdirname, self.files[file])
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cf = open(self.filenames["configFileOK"], "w")
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cf.write(self.configContentOK % (self.tmpdirname, self.tmpdirname, self.tmpdirname))
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cf.close()
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cf = open(self.filenames["configFileBroken"], "w")
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cf.write(self.configContentBroken % (self.tmpdirname, self.tmpdirname, self.tmpdirname))
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cf.close()
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def tearDown(self):
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'''remove the created tmpfiles'''
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os = self.os
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os.chdir(self.tmpdirname)
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# remove temp files
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for file in self.filenames.values():
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if os.path.exists(file):
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#os.remove(file)
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pass
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os.remove(file)
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# remove temp dir
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os.rmdir(self.tmpdirname)
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def testConfigFile(self):
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'''testConfigFile TODO'''
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def testConfigInit(self):
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'''Check various branches of config file loading'''
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self.assertRaises("ConfigError", self.CryptoBox.CryptoBoxProps,"/invalid/path/to/config/file")
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self.assertRaises("ConfigError", self.CryptoBox.CryptoBoxProps,"/etc/shadow")
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self.CryptoBox.CryptoBoxProps()
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self.CryptoBox.CryptoBoxProps(self.filenames["configFileOK"])
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self.assertRaises("ConfigError", self.CryptoBox.CryptoBoxProps,[])
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self.assertRaises("ConfigError", self.CryptoBox.CryptoBoxProps,self.filenames["configFileBroken"])
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# TODO: check details of different ConfigError-exceptions
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# TODO: use different kind of broken setups ...
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self.assertTrue(1)
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