old_contents: from django.conf import settings
  from ldapdb import escape_ldap_filter
  import ldap
  
  
  def authenticate(dn,pwd,ldap_conf_key):
      # Setup connection
      ldap_conf = settings.LDAPCONFS[ldap_conf_key]
      server = ldap_conf['server']
      ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_ALLOW)
      conn = ldap.initialize(server)
      # Authenticate
      try:
          conn.simple_bind_s(dn, pwd)
          return True
      except ldap.INVALID_CREDENTIALS:
          return False
  
  def get_suffixed_username(username,organization):
      try:
          suffix = settings.ORGANIZATION_INFO[organization]['suffix']
      except KeyError:
          suffix = None
      suffixed_username = username
      if suffix:
          suffixed_username = '{0}@{1}'.format(username,suffix)
      return suffixed_username
  
  def get_ldap_username_and_org(suffixed_username):
      username = suffixed_username
      org = 'ucb'
      if '@' in suffixed_username:
          username, suffix = suffixed_username.rsplit('@',1)
          for k,v in settings.ORGANIZATION_INFO.iteritems():
              if v['suffix'] == suffix:
                  org = k
                  break
      return username, org
  
new_contents: from django.conf import settings
  from ldapdb import escape_ldap_filter
  import ldap
  
  
  def authenticate(dn,pwd,ldap_conf_key):
      # Setup connection
      ldap_conf = settings.LDAPCONFS[ldap_conf_key]
      server = ldap_conf['server']
      ldap.set_option(ldap.OPT_X_TLS_REQUIRE_CERT, ldap.OPT_X_TLS_ALLOW)
      conn = ldap.initialize(server, bytes_mode=False)
      # Authenticate
      try:
          conn.simple_bind_s(dn, pwd)
          return True
      except ldap.INVALID_CREDENTIALS:
          return False
  
  def get_suffixed_username(username,organization):
      try:
          suffix = settings.ORGANIZATION_INFO[organization]['suffix']
      except KeyError:
          suffix = None
      suffixed_username = username
      if suffix:
          suffixed_username = '{0}@{1}'.format(username,suffix)
      return suffixed_username
  
  def get_ldap_username_and_org(suffixed_username):
      username = suffixed_username
      org = 'ucb'
      if '@' in suffixed_username:
          username, suffix = suffixed_username.rsplit('@',1)
          for k,v in settings.ORGANIZATION_INFO.iteritems():
              if v['suffix'] == suffix:
                  org = k
                  break
      return username, org
  
subject: Set bytes_mode=False for future compatability with Python3