122 lines
3.2 KiB
Python
122 lines
3.2 KiB
Python
"""
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LDAP Utilities
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This module makes use of python-ldap, a Python module with bindings
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to libldap, OpenLDAP's native C client library.
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"""
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import ldap.modlist
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def connect_sasl(uri, mech, realm):
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# open the connection
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ld = ldap.initialize(uri)
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# authenticate
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sasl = Sasl(mech, realm)
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ld.sasl_interactive_bind_s('', sasl)
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return ld
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def abslookup(ld, dn, objectclass=None):
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# search for the specified dn
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try:
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if objectclass:
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search_filter = '(objectclass=%s)' % escape(objectclass)
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matches = ld.search_s(dn, ldap.SCOPE_BASE, search_filter)
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else:
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matches = ld.search_s(dn, ldap.SCOPE_BASE)
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except ldap.NO_SUCH_OBJECT:
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return None
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# dn was found, but didn't match the objectclass filter
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if len(matches) < 1:
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return None
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# return the attributes of the single successful match
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match = matches[0]
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match_dn, match_attributes = match
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return match_attributes
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def lookup(ld, rdntype, rdnval, base, objectclass=None):
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dn = '%s=%s,%s' % (rdntype, escape(rdnval), base)
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return abslookup(ld, dn, objectclass)
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def search(ld, base, search_filter, params, scope=ldap.SCOPE_SUBTREE, attrlist=None, attrsonly=0):
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real_filter = search_filter % tuple(escape(x) for x in params)
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# search for entries that match the filter
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matches = ld.search_s(base, scope, real_filter, attrlist, attrsonly)
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return matches
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def modify(ld, rdntype, rdnval, base, mlist):
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dn = '%s=%s,%s' % (rdntype, escape(rdnval), base)
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ld.modify_s(dn, mlist)
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def modify_attrs(ld, rdntype, rdnval, base, old, attrs):
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dn = '%s=%s,%s' % (rdntype, escape(rdnval), base)
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# build list of modifications to make
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changes = ldap.modlist.modifyModlist(old, attrs)
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# apply changes
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ld.modify_s(dn, changes)
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def modify_diff(ld, rdntype, rdnval, base, old, new):
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dn = '%s=%s,%s' % (rdntype, escape(rdnval), base)
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# build list of modifications to make
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changes = make_modlist(old, new)
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# apply changes
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ld.modify_s(dn, changes)
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def escape(value):
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"""
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Escapes special characters in a value so that it may be safely inserted
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into an LDAP search filter.
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"""
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value = str(value)
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value = value.replace('\\', '\\5c').replace('*', '\\2a')
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value = value.replace('(', '\\28').replace(')', '\\29')
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value = value.replace('\x00', '\\00')
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return value
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def make_modlist(old, new):
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keys = set(old.keys()).union(set(new))
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mlist = []
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for key in keys:
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if key in old and not key in new:
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mlist.append((ldap.MOD_DELETE, key, list(set(old[key]))))
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elif key in new and not key in old:
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mlist.append((ldap.MOD_ADD, key, list(set(new[key]))))
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else:
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to_add = list(set(new[key]) - set(old[key]))
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if len(to_add) > 0:
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mlist.append((ldap.MOD_ADD, key, to_add))
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to_del = list(set(old[key]) - set(new[key]))
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if len(to_del) > 0:
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mlist.append((ldap.MOD_DELETE, key, to_del))
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return mlist
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class Sasl:
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def __init__(self, mech, realm):
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self.mech = mech
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self.realm = realm
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def callback(self, id, challenge, prompt, defresult):
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return ''
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