3 # Copyright (C) 2008-2013 W. Trevor King
4 # Copyright (C) 2012-2013 Wade Berrier
5 # Copyright (C) 2012 Niels de Vos
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
20 "LDAP address searches for Mutt"
22 import codecs as _codecs
23 import ConfigParser as _configparser
24 import hashlib as _hashlib
26 import locale as _locale
27 import logging as _logging
28 import os.path as _os_path
29 import pickle as _pickle
34 import ldap.sasl as _ldap_sasl
40 LOG = _logging.getLogger('mutt-ldap')
41 LOG.addHandler(_logging.StreamHandler())
42 LOG.setLevel(_logging.ERROR)
45 class Config (_configparser.SafeConfigParser):
47 read_configfiles = self.read(_os_path.expanduser('~/.mutt-ldap.rc'))
48 self._setup_defaults()
49 LOG.info(u'loaded configuration from {0}'.format(read_configfiles))
51 def get_connection_class(self):
52 if self.getboolean('cache', 'enable'):
53 return CachedLDAPConnection
57 def _setup_defaults(self):
58 "Setup dynamic default values"
59 self._setup_encoding_defaults()
60 self._setup_cache_defaults()
62 def _setup_encoding_defaults(self):
63 default_encoding = _locale.getpreferredencoding(do_setlocale=True)
64 for key in ['output-encoding', 'argv-encoding']:
67 self.get('system', key, raw=True) or default_encoding)
69 # HACK: convert sys.std{out,err} to Unicode (not needed in Python 3)
70 output_encoding = self.get('system', 'output-encoding')
71 _sys.stdout = _codecs.getwriter(output_encoding)(_sys.stdout)
72 _sys.stderr = _codecs.getwriter(output_encoding)(_sys.stderr)
74 # HACK: convert sys.argv to Unicode (not needed in Python 3)
75 argv_encoding = self.get('system', 'argv-encoding')
76 _sys.argv = [unicode(arg, argv_encoding) for arg in _sys.argv]
78 def _setup_cache_defaults(self):
79 if not self.get('cache', 'fields'):
80 # setup a reasonable default
81 fields = ['mail', 'cn', 'displayName'] # used by format_entry()
82 optional_column = self.get('results', 'optional-column')
84 fields.append(optional_column)
85 self.set('cache', 'fields', ' '.join(fields))
89 CONFIG.add_section('connection')
90 CONFIG.set('connection', 'server', 'domaincontroller.yourdomain.com')
91 CONFIG.set('connection', 'port', '389') # set to 636 for default over SSL
92 CONFIG.set('connection', 'ssl', 'no')
93 CONFIG.set('connection', 'starttls', 'no')
94 CONFIG.set('connection', 'basedn', 'ou=x co.,dc=example,dc=net')
95 CONFIG.add_section('auth')
96 CONFIG.set('auth', 'user', '')
97 CONFIG.set('auth', 'password', '')
98 CONFIG.set('auth', 'gssapi', 'no')
99 CONFIG.add_section('query')
100 CONFIG.set('query', 'filter', '') # only match entries according to this filter
101 CONFIG.set('query', 'search-fields', 'cn displayName uid mail') # fields to wildcard search
102 CONFIG.add_section('results')
103 CONFIG.set('results', 'optional-column', '') # mutt can display one optional column
104 CONFIG.add_section('cache')
105 CONFIG.set('cache', 'enable', 'yes') # enable caching by default
106 CONFIG.set('cache', 'path', '~/.mutt-ldap.cache') # cache results here
107 CONFIG.set('cache', 'fields', '') # fields to cache (if empty, setup in the main block)
108 CONFIG.set('cache', 'longevity-days', '14') # TODO: cache results for 14 days by default
109 CONFIG.add_section('system')
110 # HACK: Python 2.x support, see http://bugs.python.org/issue13329#msg147475
111 CONFIG.set('system', 'output-encoding', '') # match .muttrc's $charset
112 # HACK: Python 2.x support, see http://bugs.python.org/issue2128
113 CONFIG.set('system', 'argv-encoding', '')
116 class LDAPConnection (object):
117 """Wrap an LDAP connection supporting the 'with' statement
119 See PEP 343 for details.
121 def __init__(self, config=None):
125 self.connection = None
131 def __exit__(self, type, value, traceback):
135 if self.connection is not None:
136 raise RuntimeError('already connected to the LDAP server')
138 if self.config.getboolean('connection', 'ssl'):
140 url = '{0}://{1}:{2}'.format(
142 self.config.get('connection', 'server'),
143 self.config.get('connection', 'port'))
144 LOG.info(u'connect to LDAP server at {0}'.format(url))
145 self.connection = _ldap.initialize(url)
146 if (self.config.getboolean('connection', 'starttls') and
148 self.connection.start_tls_s()
149 if self.config.getboolean('auth', 'gssapi'):
150 sasl = _ldap_sasl.gssapi()
151 self.connection.sasl_interactive_bind_s('', sasl)
153 self.connection.bind(
154 self.config.get('auth', 'user'),
155 self.config.get('auth', 'password'),
159 if self.connection is None:
160 raise RuntimeError('not connected to an LDAP server')
161 LOG.info(u'unbind from LDAP server')
162 self.connection.unbind()
163 self.connection = None
165 def search(self, query):
166 if self.connection is None:
167 raise RuntimeError('connect to the LDAP server before searching')
171 fields = self.config.get('query', 'search-fields').split()
172 filterstr = u'(|{0})'.format(
173 u' '.join([u'({0}=*{1}{2})'.format(field, query, post) for
175 query_filter = self.config.get('query', 'filter')
177 filterstr = u'(&({0}){1})'.format(query_filter, filterstr)
178 LOG.info(u'search for {0}'.format(filterstr))
179 msg_id = self.connection.search(
180 self.config.get('connection', 'basedn'),
182 filterstr.encode('utf-8'))
184 while res_type != _ldap.RES_SEARCH_RESULT:
186 res_type, res_data = self.connection.result(
187 msg_id, all=False, timeout=0)
188 except _ldap.ADMINLIMIT_EXCEEDED as e:
189 LOG.warn(u'could not handle query results: {0}'.format(e))
192 # use `yield from res_data` in Python >= 3.3, see PEP 380
193 for entry in res_data:
197 class CachedLDAPConnection (LDAPConnection):
198 _cache_version = '{0}.0'.format(__version__)
201 # delay LDAP connection until we actually need it
206 super(CachedLDAPConnection, self).unbind()
210 def search(self, query):
211 cache_hit, entries = self._cache_lookup(query=query)
213 LOG.info(u'return cached entries for {0}'.format(query))
214 # use `yield from res_data` in Python >= 3.3, see PEP 380
215 for entry in entries:
218 if self.connection is None:
219 super(CachedLDAPConnection, self).connect()
221 keys = self.config.get('cache', 'fields').split()
222 for entry in super(CachedLDAPConnection, self).search(query=query):
224 # use dict comprehensions in Python >= 2.7, see PEP 274
226 [(key, data[key]) for key in keys if key in data])
227 entries.append((cn, cached_data))
229 self._cache_store(query=query, entries=entries)
231 def _load_cache(self):
232 path = _os_path.expanduser(self.config.get('cache', 'path'))
233 LOG.info(u'load cache from {0}'.format(path))
236 data = _json.load(open(path, 'rb'))
237 except IOError as e: # probably "No such file"
238 LOG.warn(u'error reading cache: {0}'.format(e))
239 except (ValueError, KeyError) as e: # probably a corrupt cache file
240 LOG.warn(u'error parsing cache: {0}'.format(e))
242 version = data.get('version', None)
243 if version == self._cache_version:
244 self._cache = data.get('queries', {})
246 LOG.debug(u'drop outdated local cache {0} != {1}'.format(
247 version, self._cache_version))
250 def _save_cache(self):
251 path = _os_path.expanduser(self.config.get('cache', 'path'))
252 LOG.info(u'save cache to {0}'.format(path))
254 'queries': self._cache,
255 'version': self._cache_version,
257 with open(path, 'wb') as f:
258 _json.dump(data, f, indent=2, separators=(',', ': '))
259 f.write('\n'.encode('utf-8'))
261 def _cache_store(self, query, entries):
262 self._cache[self._cache_key(query=query)] = {
264 'time': _time.time(),
267 def _cache_lookup(self, query):
268 data = self._cache.get(self._cache_key(query=query), None)
271 return (True, data['entries'])
273 def _cache_key(self, query):
274 return str((self._config_id(), query))
276 def _config_id(self):
277 """Return a unique ID representing the current configuration
279 config_string = _pickle.dumps(self.config)
280 return _hashlib.sha1(config_string).hexdigest()
282 def _cull_cache(self):
283 cull_days = self.config.getint('cache', 'longevity-days')
284 day_seconds = 24*60*60
285 expire = _time.time() - cull_days * day_seconds
286 for key in list(self._cache.keys()): # cull the cache
287 if self._cache[key]['time'] < expire:
288 LOG.debug('cull entry from cache: {0}'.format(key))
292 def _decode_query_data(obj):
293 if isinstance(obj, unicode): # e.g. cached JSON data
295 return unicode(obj, 'utf-8')
297 def format_columns(address, data):
298 yield _decode_query_data(address)
299 yield _decode_query_data(data.get('displayName', data['cn'])[-1])
300 optional_column = CONFIG.get('results', 'optional-column')
301 if optional_column in data:
302 yield _decode_query_data(data[optional_column][-1])
304 def format_entry(entry):
307 for m in data['mail']:
308 # http://www.mutt.org/doc/manual/manual-4.html#ss4.5
309 # Describes the format mutt expects: address\tname
310 yield u'\t'.join(format_columns(m, data))
313 if __name__ == '__main__':
316 if len(_sys.argv) < 2:
317 LOG.error(u'{0}: no search string given'.format(_sys.argv[0]))
320 query = u' '.join(_sys.argv[1:])
322 connection_class = CONFIG.get_connection_class()
324 with connection_class() as connection:
325 entries = connection.search(query=query)
326 for entry in entries:
327 addresses.extend(format_entry(entry))
328 print(u'{0} addresses found:'.format(len(addresses)))
329 print(u'\n'.join(addresses))