ezmlm-web-modules/crypto-ezmlm/trunk/python/lispet/config.py

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2009-11-04 01:28:01 +01:00
#!/usr/bin/env python2.4
#
# This file is part of lispet - an encryption filter for the
# ezmlm-idx mailinglist manager.
#
# Copyright 02007 Sense.Lab e.V. <info@senselab.org>
#
# This script decrypts an incoming mail and encrypts it for each recipient
# separately. Afterwards it calls qmail-queue for each recipient.
# It is meant as a wrapper around qmail-queue. See 'man qmail-queue' for
# details of the qmail-queue interface.
#
# Syntax:
# lispet-encrypt [MAILINGLIST_DIRECTORY]
#
# If no MAILINGLIST_DIRECTORY is given, then it will only run some self-tests.
#
# Environment settings:
# - QMAILQUEUE should contain the path of the qmail-queue program (or a
# substitute - e.g. for spam filtering) - otherwise the default location
# /var/qmail/bin/qmail-queue is used
#
#
# lispet 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.
#
# lispet 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 the CryptoBox; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
# TODO:
# implement 'sign_messages'
# implement 'hide_subject'
import sys
import os
import re
#the following modules are imported later
# import configobj
# try to load the module configobj
try:
import configobj
except ImportError:
sys.stderr.write("Failed to import the required module 'configobj'. "
. "Please check if it is installed!\n")
sys.exit(1)
############### some default settings ##################
## default settings - the setting keys must always be lower case!
DEFAULT_SETTINGS = {
"plain_without_key": False,
"sign_messages": False,
"gnupg_dir": ".gnupg"
}
def read_config(self):
"""Read the config file.
If a value is not defined in the config file, then the default value
is used.
Any line that does not really look like a config setting is ignored.
Any unknown configuration settings are ignored, too.
"""
result = DEFAULT_SETTINGS
## retrieve the absolute path of the configuration file
## by default it is relative to the mailinglist's directory
if os.path.isabs(CONF_FILE):
conf_file = CONF_FILE
else:
conf_file = os.path.join(self.list_dir, CONF_FILE)
if not os.access(conf_file, os.R_OK):
internal_error("Could not read gpgpy-ezmlm config file: %s" % conf_file)
## read all lines of the configuration file
all_lines = [ e.strip() for e in file(conf_file).readlines() ]
for line in all_lines:
## ignore empty lines, comments and lines without "="
if (not line) or e.startswith("#") or (e.find("=") == -1):
continue
key, value = line.split("=", 1)
## turn everything to lower case and remove surrounding whitespace
key, value = (key.strip().lower(), value.strip())
if (len(value) > 1) and \
((value.startswith('"') and value.endswith('"')) \
or (value.startswith("'") and value.endswith("'"))):
value = value[1:-1]
## ignore empty values or keys
if not key or not value:
continue
## check boolean values
if key in ['plain_without_key', 'sign_messages']:
if value.lower() == 'no':
result[key] = False
elif value.lower() == 'yes':
result[key] = True
else:
continue
## process the key directory
elif key == 'gnupg_dir':
result[key] = value
## unknown setting - ignore
else:
continue
if result["gnupg_dir"].startswith('~'):
result["gnupg_dir"] = os.path.expanduser(result["gnupg_dir"])
elif not os.path.isabs(result["gnupg_dir"]):
result["gnupg_dir"] = os.path.abspath(os.path.join(
self.list_dir, result["gnupg_dir"]))
return result