/usr/lib/python2.7/dist-packages/automx/config.py is in automx 0.10.0-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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automx - auto configuration service
Copyright (c) 2011-2013 [*] sys4 AG
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 3 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, see <http://www.gnu.org/licenses/>.
"""
__version__ = '0.10.0'
__author__ = "Christian Roessner, Patrick Ben Koetter"
__copyright__ = "Copyright (c) 2011-2013 [*] sys4 AG"
import os
import sys
import ConfigParser
import subprocess
import shlex
import StringIO
import re
import memcache
import logging
from ConfigParser import NoOptionError, NoSectionError
from ipaddr import IPAddress, IPNetwork
from dateutil import parser
try:
# Python 2.7
from collections import OrderedDict
except:
# Python 2.5 up to Python 2.7
from automx.ordereddict import OrderedDict
class DataNotFoundException(Exception):
pass
class Config(object, ConfigParser.RawConfigParser):
"""
This class creates the internal data structure that is completely
independend from the view. It may query different backends to gather all
required information needed to generate XML output later on in the view
class.
It uses a OrderdDict to guarentee the correct service order that is needed
in the XML output. This said means that it is a difference, if a service
like IMAP is configured before POP3 or upside down, because a MUA follows
this order.
The class currently support smtp, pop and imap services.
The class currently supports the following backends:
-> global - This backend tells automx to use the global section
-> static - all kind of service information that can be sent directly to
the MUA
-> filter - This backend can execute commands and collects results from
stdout. The result may be "", which means we skip further
searching. It may return data, which should point to a section
that we try to follow.
-> ldap - Read all kind of information from LDAP servers. The result
attributes are stored in an internal dictionary and if options
later on in this backend section (is read as static backend)
do contain variables in the form ${attributename}, these are
expanded to the collected data.
-> sql - Read all kind of information from SQL servers. The result
attributes are stored in an internal dictionary. See ldpa
-> script - Execute a script and split a result into attributes, which are
stored in an internal dictionary, See ldap
-> file - Provide static files. If present, all collected data are
discarded and only the static file is sent to the remote
client. This may change in future releases.
Note: There may exist a DEFAULT section that is appended to _all_ sections
in the configuration file. That said you can do really complex
configurations that on the other hand make life easier. This section also
may contain variables, which, if found in the vars-dictionary, are used.
"""
def __init__(self, environ):
ConfigParser.RawConfigParser.__init__(self,
defaults=None,
dict_type=OrderedDict)
self.read("/etc/automx.conf")
if not self.has_section("automx"):
raise Exception("Missing section 'automx'")
if self.has_option("automx", "logfile"):
self.logfile = self.get("automx", "logfile")
else:
self.logfile = None
if self.has_option("automx", "debug"):
self.debug = self.getboolean("automx", "debug")
else:
self.debug = False
self.memcache = Memcache(self, environ)
def configure(self, emailaddress, cn=None, password=None):
if emailaddress is None:
return OrderedDict()
# Full email address containing local part _and_ domain
self.__emailaddress = emailaddress
# Mobileconfig
if cn is None:
self.__cn = ""
else:
self.__cn = cn
if password is None:
self.__password = ""
else:
self.__password = password
domain = emailaddress.split("@")[1]
# The domain that is searched in the config file
self.__search_domain = domain
self.__automx = dict()
# domain individual settings (overwrites some or all defaults)
self.__domain = OrderedDict()
# if we use dynamic backends, we might earn variables
self.__vars = dict()
try:
provider = self.get("automx", "provider")
# provider must be a domainname
pattern = "^[0-9a-zA-Z.-]+[a-zA-Z]{2,9}$"
prog = re.compile(pattern)
result = prog.match(provider)
if result is not None:
self.__automx["provider"] = result.group(0)
else:
logging.error("<provider> setting broken!")
self.__automx["provider"] = "provider.broken"
tmp = self.create_list(self.get("automx", "domains"))
self.__automx["domains"] = tmp
except TypeError:
raise Exception("Missing options in section automx")
# if a domain has its own section, use settings from it
cmp_domains = [dom.lower() for dom in self.__automx["domains"]]
if (domain.lower() in iter(cmp_domains) or
self.__automx["domains"][0] == "*"):
cmp_sections = [dom.lower() for dom in self.sections()]
if domain.lower() in iter(cmp_sections):
self.__eval_options(domain)
else:
if self.has_section("global"):
self.__eval_options("global")
else:
raise Exception("Missing section 'global'")
# we need to use default values from config file
self.__domain = self.__replace_makro(self.__domain)
def __eval_options(self, section, backend=None):
settings = self.__domain
settings["domain"] = self.__search_domain
settings["emailaddress"] = self.__emailaddress
section = self.__find_section(section)
if self.has_option(section, "backend"):
if backend is None:
try:
backend = self.get(section, "backend")
except NoOptionError:
raise Exception("Missing option <backend>")
if backend in ("static", "static_append"):
for opt in iter(self.options(section)):
if opt in ("action",
"account_type",
"account_name",
"account_name_short",
"display_name",
"server_url",
"server_name"):
tmp = self.get(section, opt)
result = self.__expand_vars(tmp)
result = self.__replace_makro(result)
settings[opt] = result
elif opt == "smtp":
service = self.__service(section, "smtp")
elif opt == "imap":
service = self.__service(section, "imap")
elif opt == "pop":
service = self.__service(section, "pop")
elif opt == "sign_mobileconfig":
try:
settings[opt] = self.getboolean(section, opt)
except:
logging.error("%s is not boolean!" % opt)
settings[opt] = False
elif opt in ("sign_cert", "sign_key"):
result = self.get(section, opt)
if os.path.exists(result):
settings[opt] = result
else:
logging.error("%s cannot read %s" % (opt, result))
else:
pass
if opt in ("smtp", "imap", "pop"):
if backend == "static_append":
if settings.has_key(opt):
if self.debug:
logging.debug("APPEND %s" % service)
settings[opt].append(service)
else:
if self.debug:
logging.debug("APPEND NEW %s"
% service)
settings[opt] = [service]
else:
# do not include empty services
if len(service) != 0:
if self.debug:
logging.debug("STATIC %s" % service)
service_category = OrderedDict()
service_category[opt] = [service]
settings.update(service_category)
# always follow at the end!
if "follow" in self.options(section):
tmp = self.get(section, "follow")
result = self.__expand_vars(tmp)
result = self.__replace_makro(result)
self.__eval_options(result)
elif backend in ("ldap", "ldap_append"):
try:
import ldap
import ldap.sasl
except:
raise Exception("python ldap missing")
ldap_cfg = dict(host = "ldap://127.0.0.1/",
base = "",
bindmethod = "simple",
binddn = None,
bindpw = None,
saslmech = None,
authzid = "",
filter = "(objectClass=*)",
result_attrs = [],
scope = "sub",
usetls = "no",
cipher = "TLSv1",
reqcert ="never",
cert = None,
key = None,
cacert = None)
tls = False
sasl = False
for opt in iter(self.options(section)):
if opt in ("host",
"base",
"bindmethod",
"binddn",
"bindpw",
"saslmech",
"authzid",
"filter",
"result_attrs",
"scope",
"usetls",
"cipher",
"reqcert",
"cert",
"key",
"cacert"):
result = self.get(section, opt)
if opt in ("host", "result_attrs"):
result = self.create_list(result)
ldap_cfg[opt] = result
# Do we connect with TLS?
if ldap_cfg["usetls"].lower() in ("yes", "true", "1"):
if ldap_cfg["reqcert"] in ("never",
"allow",
"try",
"demand"):
rc = ldap_cfg["reqcert"]
if rc == "never":
reqcert = ldap.OPT_X_TLS_NEVER
elif rc == "allow":
reqcert = ldap.OPT_X_TLS_ALLOW
elif rc == "try":
reqcert = ldap.OPT_X_TLS_TRY
elif rc == "demand":
reqcert = ldap.OPT_X_TLS_DEMAND
ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, reqcert)
ldap.set_option(ldap.OPT_X_TLS_CIPHER_SUITE,
ldap_cfg["cipher"])
if ldap_cfg["cacert"] is not None:
ldap.set_option(ldap.OPT_X_TLS_CACERTFILE,
ldap_cfg["cacert"])
if ldap_cfg["cert"] is not None:
ldap.set_option(ldap.OPT_X_TLS_CERTFILE,
ldap_cfg["cert"])
if ldap_cfg["key"] is not None:
ldap.set_option(ldap.OPT_X_TLS_KEYFILE,
ldap_cfg["key"])
tls = True
# Are we SASL binding to our servers?
if ldap_cfg["bindmethod"] == "sasl":
mech = ldap_cfg["saslmech"]
if mech is not None:
if mech.lower() == "digest-md5":
auth_tokens = ldap.sasl.digest_md5(
ldap_cfg["binddn"],
ldap_cfg["bindpw"])
elif mech.lower() == "cram-md5":
auth_tokens = ldap.sasl.cram_md5(
ldap_cfg["binddn"],
ldap_cfg["bindpw"])
elif mech.lower() == "external":
auth_tokens = ldap.sasl.external(
ldap_cfg["authzid"])
elif mech.lower() == "gssapi":
auth_tokens = ldap.sasl.gssapi(ldap_cfg["authzid"])
sasl = True
con = None
for server in iter(ldap_cfg["host"]):
try:
con = ldap.initialize(server)
if tls:
con.start_tls_s()
if sasl:
con.sasl_interactive_bind_s("", auth_tokens)
else:
con.simple_bind_s(ldap_cfg["binddn"],
ldap_cfg["bindpw"])
except Exception, e:
logging.error("LDAP: %s" % e)
continue
break
if con is not None:
if ldap_cfg["scope"] in ("sub", "subtree"):
scope = ldap.SCOPE_SUBTREE
elif ldap_cfg["scope"] in ("one", "onelevel"):
scope = ldap.SCOPE_ONELEVEL
elif ldap_cfg["scope"] in ("base", "exact"):
scope = ldap.SCOPE_BASE
filter = self.__replace_makro(ldap_cfg["filter"])
rid = con.search(ldap_cfg["base"],
scope,
filter,
ldap_cfg["result_attrs"])
raw_res = (None, None)
raw_res = con.result(rid, True, 60)
if raw_res[0] == None:
con.abandon(rid)
raise Exception("LDAP server timeout reached")
# connection established, we have results
self.__vars = dict()
# we did not receive data from LDAP
if raw_res[1] != []:
for entry in raw_res[1]:
for key, value in entry[1].items():
# result attributes might be multi values, but
# we only accept the first value.
self.__vars[key] = unicode(value[0], "utf-8")
else:
logging.warning("No LDAP result from server!")
raise DataNotFoundException
try:
con.unbind()
except ldap.LDAPError, e:
pass
if backend == "ldap":
self.__eval_options(section, backend="static")
else:
self.__eval_options(section, backend="static_append")
elif backend in ("sql", "sql_append"):
try:
from sqlalchemy.engine import create_engine
except:
raise Exception("python sqlalchemy missing")
sql_cfg = dict(host = None, query = "", result_attrs = [])
for opt in iter(self.options(section)):
if opt in ("host", "result_attrs"):
result = self.create_list(self.get(section, opt))
sql_cfg[opt] = result
if self.has_option(section, "query"):
query = self.get(section, "query")
sql_cfg["query"] = self.__replace_makro(query)
else:
raise Exception("Missing option <query>")
for con in iter(sql_cfg["host"]):
try:
engine = create_engine(con)
connection = engine.connect()
except Exception, e:
logging.error("SQL: %s" % e)
continue
result = connection.execute(sql_cfg["query"])
for row in result:
keys = row.keys()
for key in iter(keys):
if key in iter(sql_cfg["result_attrs"]):
self.__vars[key] = row[key]
# Implicit LIMIT 1 here
break
else:
logging.warning("No SQL result from server!")
connection.close()
raise DataNotFoundException
connection.close()
break
if backend == "sql":
self.__eval_options(section, backend="static")
else:
self.__eval_options(section, backend="static_append")
elif backend in ("file", "file_append"):
for opt in iter(self.options(section)):
if opt in ("autoconfig", "autodiscover", "mobileconfig"):
tmp = self.get(section, opt)
result = self.__expand_vars(tmp)
if os.path.exists(result):
settings[opt] = result
if backend == "file":
self.__eval_options(section, backend="static")
else:
self.__eval_options(section, backend="static_append")
elif backend in ("script", "script_append"):
if self.has_option(section, "script"):
script_args = self.get(section, "script")
else:
raise Exception("Missing option <script>")
if self.has_option(section, "result_attrs"):
result_attrs = self.create_list(self.get(section,
"result_attrs"))
else:
raise Exception("Missing option <result_attrs>")
seperator = None
if self.has_option(section, "seperator"):
seperator = self.get(section, "seperator")
cmd = shlex.split(self.get(section, "script"))
for i, item in enumerate(cmd):
cmd[i] = self.__replace_makro(item)
stdout_fd = sys.__stdout__.fileno()
pipe_in, pipe_out = os.pipe()
pid = os.fork()
if pid == 0:
# child
os.close(pipe_in)
os.dup2(pipe_out, stdout_fd)
os.execvp(cmd[0], cmd)
raise Exception("ERROR in execvp()" )
elif pid > 0:
# parent
os.close(pipe_out)
recv = os.read(pipe_in, 1024)
result = os.waitpid(pid, 0)
# check return code
if result[1] != 0:
raise Exception("ERROR while calling script",
result,
recv.strip())
if len(recv) == 0:
logging.warning("No result from script!")
raise DataNotFoundException
result = recv.strip().split(seperator, len(result_attrs))
for i in range(min(len(result_attrs), len(result))):
self.__vars[result_attrs[i]] = result[i].strip()
if backend == "script":
self.__eval_options(section, backend="static")
else:
self.__eval_options(section, backend="static_append")
### backends beyond this line do not have a follow option ###
elif backend == "filter":
if self.has_option(section, "section_filter"):
tmp = self.create_list(self.get(section, "section_filter"))
special_opts = tmp
got_data = False
for special_opt in iter(special_opts):
if self.has_option(section, special_opt):
cmd = shlex.split(self.get(section, special_opt))
for i, item in enumerate(cmd):
cmd[i] = self.__replace_makro(item)
stdout_fd = sys.__stdout__.fileno()
pipe_in, pipe_out = os.pipe()
pid = os.fork()
if pid == 0:
# child
os.close(pipe_in)
os.dup2(pipe_out, stdout_fd)
os.execvp(cmd[0], cmd)
raise Exception("ERROR in execvp()")
elif pid > 0:
# parent
os.close(pipe_out)
recv = os.read(pipe_in, 1024)
result = os.waitpid(pid, 0)
else:
continue
# check return code
if result[1] != 0:
raise Exception("ERROR while calling filter",
result,
recv.strip())
else:
new_emailaddress = recv.strip()
# The result seems not to be an email address
if '@' not in new_emailaddress:
continue
if self.debug:
logging.debug("Email address from filter: %s"
% new_emailaddress)
got_data = True
# we replace our search_domain
self.__search_domain = special_opt
self.__emailaddress = new_emailaddress
# recurse again, because we now have a new section
# that we need to scan
self.__eval_options(special_opt)
# we already got a result. Do not continue!
break
if not got_data:
raise DataNotFoundException
elif backend == "global":
if self.has_section("global"):
self.__eval_options("global")
settings = self.__replace_makro(settings)
else:
raise Exception("Missing section 'global'")
else:
raise Exception("Unknown backend specified")
def __service(self, section, service):
# This method only stores meta information. The results depend on
# the MUA xml schema specification and is defined in the Viewer-class
proto_settings = OrderedDict()
if self.getboolean(section, service) == True:
if self.has_option(section, service + "_server"):
opt = service + "_server"
result = self.__expand_vars(self.get(section, opt))
proto_settings[opt] = result
if self.has_option(section, service + "_port"):
opt = service + "_port"
result = self.__expand_vars(self.get(section, opt))
proto_settings[opt] = result
if self.has_option(section, service + "_encryption"):
opt = service + "_encryption"
result = self.__expand_vars(self.get(section, opt))
if result.lower() == "none":
result = "none"
elif result.lower() == "ssl":
result = "ssl"
elif result.lower() == "starttls":
result = "starttls"
elif result.lower() == "auto":
result = "auto"
proto_settings[opt] = result
if self.has_option(section, service + "_auth"):
opt = service + "_auth"
result = self.__expand_vars(self.get(section, opt))
if result.lower() == "plaintext":
result = "cleartext"
elif result.lower() == "encrypted":
result = "encrypted"
elif result.lower() == "ntlm":
result = "ntlm"
elif result.lower() == "gssapi":
result = "gssapi"
elif result.lower() == "client-ip-address":
result = "client-ip-address"
elif result.lower() == "tls-client-cert":
result = "tls-client-cert"
elif result.lower() == "none":
result = "none"
elif result.lower() == "smtp-after-pop":
if service == "smtp":
result = "smtp-after-pop"
# TODO: we allow bogus keys/values.
proto_settings[opt] = result
if self.has_option(section, service + "_auth_identity"):
opt = service + "_auth_identity"
result = self.__expand_vars(self.get(section, opt))
proto_settings[opt] = self.__replace_makro(result)
else:
emaillocalpart = self.__replace_makro("%u")
proto_settings[service + "_auth_identity"] = emaillocalpart
if self.has_option(section, service + "_expiration_date"):
opt = service + "_expiration_date"
result = self.__expand_vars(self.get(section, opt))
dt = parser.parse(result, fuzzy=True)
proto_settings[opt] = dt.strftime("%Y%m%d")
if self.has_option(section, service + "_refresh_ttl"):
opt = service + "_refresh_ttl"
result = self.get(section, opt)
proto_settings[opt] = result
if service == "smtp":
if self.has_option(section, service + "_author"):
opt = service + "_author"
author = self.__expand_vars(self.get(section, opt))
if author == "%s":
proto_settings[opt] = self.__emailaddress
if self.has_option(section, service + "_default"):
try:
opt = service + "_default"
tmp = self.__expand_vars(self.get(section, opt))
if tmp.lower() in ("yes", "true", "1"):
result = "Yes"
else:
result = "No"
proto_settings[opt] = result
except ValueError:
pass
return proto_settings
def create_list(self, value):
result = value.split()
if len(result) > 1:
for i, item in enumerate(result):
result[i] = item.split(",")[0]
return result
def __replace_makro(self, expression):
if "%u" in expression:
user = self.__emailaddress.split("@")[0]
expression = expression.replace("%u", user)
if "%d" in expression:
domain = self.__search_domain
expression = expression.replace("%d", domain)
if "%s" in expression:
email = self.__emailaddress
expression = expression.replace("%s", email)
return expression
def __expand_vars(self, expression):
# do we have some dynamic variables?
if len(self.__vars) == 0:
return expression
def repl(mobj):
if self.__vars.has_key(mobj.group(1)):
result = self.__vars[mobj.group(1)]
if mobj.group(2) is not None:
macro = mobj.group(2)[1:]
if self.debug:
logging.debug("__expand_vars()->macro=%s" % macro)
if "@" in result:
if macro == "%u":
return result.split("@")[0]
if macro == "%d":
return result.split("@")[1]
if macro == "%s":
return result
result = result.split("@")[1]
# now the macro may only be part of a FQDN hostname
if "." in result:
dcs = result.split(".")
if macro in ("%1", "%2", "%3", "%4", "%5",
"%6", "%7", "%8", "%9"):
i = int(macro[1])
if len(dcs) < i:
return ""
return dcs[-i]
return result
else:
# we always must expand variables. Even if it is the empty
# string
return ""
result = re.sub(r"\$\{(\w+)(:%[sud1-9])?\}",
repl,
unicode(expression, "utf-8"),
re.UNICODE)
if self.debug:
logging.debug("__expand_vars()->result=%s" % result)
return result
def __find_section(self, domain):
l = self.sections()
for section in iter(l):
if section.lower() == domain.lower():
return section
raise NoSectionError(domain)
def get_provider(self):
return self.__automx["provider"]
provider = property(fget=get_provider)
def get_domain(self):
return self.__domain
domain = property(fget=get_domain)
def get_cn(self):
return self.__cn
cn = property(fget=get_cn)
def get_password(self):
return self.__password
password = property(fget=get_password)
def get_emailaddress(self):
return self.__emailaddress
emailaddress = property(fget=get_emailaddress)
class Memcache(object):
def __init__(self, config, environ):
self.__config = config
self.__environ = environ
# Memcache usage is optional
self.__has_memcache = True
self.__found = False
self.__client = None
self.__current = 0
try:
self.__mc = memcache.Client([config.get("automx", "memcache")])
except ValueError, e:
logging.warning("Memcache misconfigured: ", e)
self.__has_memcache = False
def counter(self):
return self.__current
def set_client(self):
if not self.__has_memcache:
return
if self.__is_trusted_network():
return
if self.__config.has_option("automx", "memcache_ttl"):
try:
ttl = self.__config.getint("automx", "memcache_ttl")
except ValueError, e:
logging.warning("Memcache <memcache_ttl>, using default: ", e)
ttl = 600
else:
ttl = 600
if self.__found:
self.__current += 1
self.__mc.set(self.__client, self.__current, time=ttl)
def allow_client(self):
if not self.__has_memcache:
return True
self.__client = self.__environ["REMOTE_ADDR"]
if self.__is_trusted_network():
return True
if self.__config.has_option("automx", "client_error_limit"):
try:
limit = self.__config.getint("automx", "client_error_limit")
except ValueError, e:
logging.warning("Memcache <client_error_limit>, "
"using default: ", e)
limit = 20
else:
limit = 20
result = self.__mc.get(self.__client)
if result is not None:
self.__found = True
self.__current = result
if self.__current < limit:
return True
else:
self.set_client()
return False
def __is_trusted_network(self):
if self.__config.has_option("automx", "rate_limit_exception_networks"):
networks = self.__config.get("automx",
"rate_limit_exception_networks")
networks = self.__config.create_list(networks)
else:
networks = ("127.0.0.1", "::1/128")
for network in iter(networks):
if IPAddress(self.__client) in IPNetwork(network):
return True
return False
# vim: expandtab ts=4 sw=4
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