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https://github.com/kakwa/ldapcherry
synced 2024-11-22 09:24:21 +01:00
many comment + encoding fixes
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kakwa
parent
383c68f8b8
commit
6ee0ff0354
@ -37,6 +37,8 @@ ALL_ATTRS = 3
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class Backend(ldapcherry.backend.Backend):
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def __init__(self, config, logger, name, attrslist, key):
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"""Backend initialization"""
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# Recover all the parameters
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self.config = config
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self._logger = logger
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self.backend_name = name
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@ -55,6 +57,8 @@ class Backend(ldapcherry.backend.Backend):
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self.dn_user_attr = self.get_param('dn_user_attr')
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self.objectclasses = []
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self.key = key
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# objectclasses parameter is a coma separated list in configuration
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# split it to get a real list, and convert it to bytes
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for o in re.split('\W+', self.get_param('objectclasses')):
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self.objectclasses.append(self._str(o))
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self.group_attrs = {}
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@ -67,7 +71,9 @@ class Backend(ldapcherry.backend.Backend):
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for a in attrslist:
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self.attrlist.append(self._str(a))
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# exception handler (mainly to log something meaningful)
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def _exception_handler(self, e):
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""" Exception handling"""
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et = type(e)
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if et is ldap.OPERATIONS_ERROR:
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self._logger(
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@ -117,7 +123,8 @@ class Backend(ldapcherry.backend.Backend):
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severity=logging.ERROR,
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msg="Access error on '" +
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self.backend_name +
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"' backend, please check your acls in this backend",
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"' backend, please check your acls in backend " +
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self.backend_name,
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)
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elif et is ldap.ALREADY_EXISTS:
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desc = e[0]['desc']
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@ -128,11 +135,12 @@ class Backend(ldapcherry.backend.Backend):
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else:
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self._logger(
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severity=logging.ERROR,
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msg="unknow ldap exception in ldap backend",
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msg="unknow exception in backend " + self.backend_name,
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)
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raise
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def _connect(self):
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"""Initialize an ldap client"""
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ldap_client = ldap.initialize(self.uri)
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ldap.set_option(ldap.OPT_REFERRALS, 0)
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ldap.set_option(ldap.OPT_TIMEOUT, self.timeout)
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@ -140,7 +148,9 @@ class Backend(ldapcherry.backend.Backend):
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ldap.set_option(ldap.OPT_X_TLS_DEMAND, True)
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else:
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ldap.set_option(ldap.OPT_X_TLS_DEMAND, False)
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# set the CA file if declared and if necessary
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if self.ca and self.checkcert == 'on':
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# check if the CA file actually exists
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if os.path.isfile(self.ca):
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ldap.set_option(ldap.OPT_X_TLS_CACERTFILE, self.ca)
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else:
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@ -176,6 +186,7 @@ class Backend(ldapcherry.backend.Backend):
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return ldap_client
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def _bind(self):
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"""bind to the ldap with the technical account"""
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ldap_client = self._connect()
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try:
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ldap_client.simple_bind_s(self.binddn, self.bindpassword)
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@ -185,6 +196,7 @@ class Backend(ldapcherry.backend.Backend):
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return ldap_client
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def _search(self, searchfilter, attrs, basedn):
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"""Generic search"""
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if attrs == NO_ATTR:
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attrlist = []
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elif attrs == DISPLAYED_ATTRS:
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@ -197,6 +209,7 @@ class Backend(ldapcherry.backend.Backend):
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else:
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attrlist = None
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# bind and search the ldap
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ldap_client = self._bind()
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try:
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r = ldap_client.search_s(
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@ -211,7 +224,10 @@ class Backend(ldapcherry.backend.Backend):
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ldap_client.unbind_s()
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# reencode everything in utf-8
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# python-ldap doesn't know utf-8,
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# it treates everything as bytes.
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# So it's necessary to reencode
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# it's output in utf-8.
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ret = []
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for entry in r:
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uni_dn = self._uni(entry[0])
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@ -228,6 +244,7 @@ class Backend(ldapcherry.backend.Backend):
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return ret
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def _get_user(self, username, attrs=ALL_ATTRS):
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"""Get a user from the ldap"""
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username = ldap.filter.escape_filter_chars(username)
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user_filter = self.user_filter_tmpl % {
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@ -239,23 +256,33 @@ class Backend(ldapcherry.backend.Backend):
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if len(r) == 0:
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return None
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# if NO_ATTR, only return the DN
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if attrs == NO_ATTR:
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dn_entry = r[0][0]
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# in other cases, return everything (dn + attributes)
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else:
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dn_entry = r[0]
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return dn_entry
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# python-ldap talks in bytes,
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# as the rest of ldapcherry talks in unicode utf-8:
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# * everything passed to python-ldap must be converted to bytes
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# * everything coming from python-ldap must be converted to unicode
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def _str(self, s):
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"""unicode -> bytes conversion"""
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if s is None:
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return None
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return s.encode('utf-8')
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def _uni(self, s):
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"""bytes -> unicode conversion"""
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if s is None:
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return None
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return s.decode('utf-8', 'ignore')
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def auth(self, username, password):
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"""Authentication of a user"""
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binddn = self._str(self._get_user(username, NO_ATTR))
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if binddn is not None:
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@ -271,18 +298,22 @@ class Backend(ldapcherry.backend.Backend):
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return False
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def add_user(self, attrs):
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"""add a user"""
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ldap_client = self._bind()
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attrs_str = {}
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# encoding crap
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for a in attrs:
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attrs_str[self._str(a)] = self._str(attrs[a])
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attrs_str['objectClass'] = self.objectclasses
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# construct is DN
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dn = \
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self._str(self.dn_user_attr) +\
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'=' +\
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self._str(attrs[self.dn_user_attr]) +\
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',' +\
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self._str(self.userdn)
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# gen the ldif fir add_s and add the user
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ldif = modlist.addModlist(attrs_str)
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try:
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ldap_client.add_s(dn, ldif)
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@ -292,15 +323,20 @@ class Backend(ldapcherry.backend.Backend):
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ldap_client.unbind_s()
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def del_user(self, username):
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"""delete a user"""
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ldap_client = self._bind()
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# recover the user dn
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dn = self._str(self._get_user(username, NO_ATTR))
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# delete
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if dn is not None:
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ldap_client.delete_s(dn)
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else:
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ldap_client.unbind_s()
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raise DelUserDontExists(username)
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ldap_client.unbind_s()
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def set_attrs(self, username, attrs):
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""" Set user attributes"""
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ldap_client = self._bind()
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tmp = self._get_user(username, ALL_ATTRS)
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dn = self._str(tmp[0])
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@ -319,6 +355,8 @@ class Backend(ldapcherry.backend.Backend):
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[[(battr, bcontent, 1)]] + ldap.dn.str2dn(dn)[1:]
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)
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else:
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# if attr is already set, replace the value
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# (see dict old passed to modifyModlist)
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if attr in old_attrs:
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if type(old_attrs[attr]) is list:
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tmp = []
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@ -328,6 +366,7 @@ class Backend(ldapcherry.backend.Backend):
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else:
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bold_value = self._str(old_attrs[attr])
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old = {battr: bold_value}
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# attribute is not set, just add it
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else:
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old = {}
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ldif = modlist.modifyModlist(old, new)
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@ -341,14 +380,18 @@ class Backend(ldapcherry.backend.Backend):
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def add_to_groups(self, username, groups):
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ldap_client = self._bind()
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# recover dn of the user and his attributes
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tmp = self._get_user(username, ALL_ATTRS)
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dn = tmp[0]
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attrs = tmp[1]
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attrs['dn'] = dn
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dn = self._str(tmp[0])
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# add user to all groups
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for group in groups:
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group = self._str(group)
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# iterate on group membership attributes
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for attr in self.group_attrs:
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# fill the content template
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content = self._str(self.group_attrs[attr] % attrs)
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self._logger(
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severity=logging.DEBUG,
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@ -357,7 +400,7 @@ class Backend(ldapcherry.backend.Backend):
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" setting '%(attr)s' to '%(content)s'" % {
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'user': username,
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'dn': self._uni(dn),
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'group': group,
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'group': self._uni(group),
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'attr': attr,
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'content': self._uni(content),
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'backend': self.backend_name
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@ -366,6 +409,7 @@ class Backend(ldapcherry.backend.Backend):
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ldif = modlist.modifyModlist({}, {attr: content})
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try:
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ldap_client.modify_s(group, ldif)
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# if already member, not a big deal, just log it and continue
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except ldap.TYPE_OR_VALUE_EXISTS as e:
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self._logger(
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severity=logging.INFO,
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@ -373,7 +417,7 @@ class Backend(ldapcherry.backend.Backend):
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" already member of group '%(group)s'"
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"(attribute '%(attr)s')" % {
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'user': username,
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'group': group,
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'group': self._uni(group),
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'attr': attr,
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'backend': self.backend_name
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}
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@ -386,6 +430,9 @@ class Backend(ldapcherry.backend.Backend):
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ldap_client.unbind_s()
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def del_from_groups(self, username, groups):
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"""Delete user from groups"""
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# it follows the same logic than add_to_groups
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# but with MOD_DELETE
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ldap_client = self._bind()
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tmp = self._get_user(username, ALL_ATTRS)
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dn = tmp[0]
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@ -406,7 +453,7 @@ class Backend(ldapcherry.backend.Backend):
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" wasn't member of group '%(group)s'"
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" (attribute '%(attr)s')" % {
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'user': username,
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'group': group,
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'group': self._uni(group),
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'attr': attr,
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'backend': self.backend_name
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}
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@ -417,12 +464,16 @@ class Backend(ldapcherry.backend.Backend):
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ldap_client.unbind_s()
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def search(self, searchstring):
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ret = {}
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"""Search users"""
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# escape special char to avoid injection
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searchstring = ldap.filter.escape_filter_chars(searchstring)
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# fill the search string template
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searchfilter = self.search_filter_tmpl % {
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'searchstring': searchstring
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}
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ret = {}
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# search an process the result a little
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for u in self._search(searchfilter, DISPLAYED_ATTRS, self.userdn):
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attrs = {}
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attrs_tmp = u[1]
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@ -438,6 +489,7 @@ class Backend(ldapcherry.backend.Backend):
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return ret
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def get_user(self, username):
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"""Gest a specific user"""
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ret = {}
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tmp = self._get_user(username, ALL_ATTRS)
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if tmp is None:
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@ -452,7 +504,7 @@ class Backend(ldapcherry.backend.Backend):
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return ret
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def get_groups(self, username):
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"""Get all groups of a user"""
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username = ldap.filter.escape_filter_chars(username)
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userdn = self._get_user(username, NO_ATTR)
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@ -464,5 +516,5 @@ class Backend(ldapcherry.backend.Backend):
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groups = self._search(searchfilter, NO_ATTR, self.groupdn)
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ret = []
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for entry in groups:
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ret.append(self._uni(entry[0]))
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ret.append(entry[0])
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return ret
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