system: You are an expert security code reviewer. You will be shown a source code file along with a multiple-choice question listing several function or class names from that file. Your task is to identify which one contains the specified CWE vulnerability.

OUTPUT FORMAT: Respond with the single letter of the correct option, wrapped in \boxed{...}. Example: `\boxed{B}`. Output the boxed letter ONLY -- no explanation, no other text.

user: ```python
"""SecureXMLRPCServer.py - simple XML RPC server supporting SSL.

Based on this article: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/81549

For windows users: http://webcleaner.sourceforge.net/pyOpenSSL-0.6.win32-py2.4.exe

Imported from http://code.activestate.com/recipes/496786-simple-xml-rpc-server-over-https/ 
"""
import SocketServer
import BaseHTTPServer
import SimpleHTTPServer
import SimpleXMLRPCServer

import socket, os
from OpenSSL import SSL
from utils.Logger import Logger

from settings.settingsLoader import XMLRPC_SERVER_LISTEN_HOST,XMLRPC_SERVER_LISTEN_PORT,XMLRPC_SERVER_KEYFILE,XMLRPC_SERVER_CERTFILE,XMLRPC_SERVER_PASSWORD


class SecureXMLRPCServer(BaseHTTPServer.HTTPServer,SimpleXMLRPCServer.SimpleXMLRPCDispatcher):
    def log_request(self, code='-', size='-'): 
        pass

    def __init__(self, server_address, HandlerClass, logRequests=False):
        """Secure XML-RPC server.

        It it very similar to SimpleXMLRPCServer but it uses HTTPS for transporting XML data.
        """
        self.logRequests = logRequests

        SimpleXMLRPCServer.SimpleXMLRPCDispatcher.__init__(self)
        SocketServer.BaseServer.__init__(self, server_address, HandlerClass)
        ctx = SSL.Context(SSL.SSLv23_METHOD)

        ctx.use_privatekey_file (XMLRPC_SERVER_KEYFILE)
        ctx.use_certificate_file(XMLRPC_SERVER_CERTFILE)
        self.socket = SSL.Connection(ctx, socket.socket(self.address_family,
                                                        self.socket_type))
        self.server_bind()
        self.server_activate()

class SecureXMLRpcRequestHandler(SimpleXMLRPCServer.SimpleXMLRPCRequestHandler):
    """Secure XML-RPC request handler class.

    It it very similar to SimpleXMLRPCRequestHandler but it uses HTTPS for transporting XML data.
    """
    def setup(self):
        self.connection = self.request
        self.rfile = socket._fileobject(self.request, "rb", self.rbufsize)
        self.wfile = socket._fileobject(self.request, "wb", self.wbufsize)
        
    def do_POST(self):
        """Handles the HTTPS POST request.

        It was copied out from SimpleXMLRPCServer.py and modified to shutdown the socket cleanly.
        """

        try:
            # get arguments
            data = self.rfile.read(int(self.headers["content-length"]))
            # In previous versions of SimpleXMLRPCServer, _dispatch
            # could be overridden in this class, instead of in
            # SimpleXMLRPCDispatcher. To maintain backwards compatibility,
            # check to see if a subclass implements _dispatch and dispatch
            # using that method if present.
            response = self.server._marshaled_dispatch(
                    data, getattr(self, '_dispatch', None)
                )
        except: # This should only happen if the module is buggy
            # internal error, report as HTTP server error
            self.send_response(500)
            self.end_headers()
        else:
            # got a valid XML RPC response
            self.send_response(200)
            self.send_header("Content-type", "text/xml")
            self.send_header("Content-length", str(len(response)))
            self.end_headers()
            self.wfile.write(response)

            # shut down the connection
            self.wfile.flush()
            self.connection.shutdown() # Modified here!
    
class XmlRpcServer():
	
	logger = Logger.getLogger()

	@staticmethod
	def createInstanceAndEngage(callBackFunction,HandlerClass = SecureXMLRpcRequestHandler,ServerClass = SecureXMLRPCServer):
            """Test xml rpc over https server"""
            class xmlrpc_wrappers:
                def __init__(self):
                    import string
                    self.python_string = string

                def send(self, callBackUrl,amId,password,xml):
                    #FIXME: XXX: use certificates instead of password based authentication
                    if password != XMLRPC_SERVER_PASSWORD:
                        raise Exception("Password mismatch")
                    callBackFunction(callBackUrl,xml)
                    return ""

                def force_list_active_vms(self, password, vm_uuid):
                    """
                    Returns dictionary with VM's UUIDs and names.
                    Parameters:
                        vm_uuid: if passed, it will return data for that domain only.
                                 Otherwise, the whole list of VMs will be returned
                    """
                    from xen.XendManager import XendManager
                    if password != XMLRPC_SERVER_PASSWORD:
                        raise Exception("Password mismatch")
                    active_vms = dict()
                    active_domains = XendManager.retrieveActiveDomainsByUUID()
                    for vm in active_domains:
                        if (str(vm_uuid) != 'None'):
                            if vm[0] == vm_uuid:
                                active_vms[vm[0]] = vm[1]
                                break
                        else:
                            active_vms[vm[0]] = vm[1]
                    return active_vms

                # FIXME Internally works well, but cannot return "too much" data - server hangs
                def list_vm_templates(self, password):
                #def list_vm_templates(self, callback_url, password):
                    if password != XMLRPC_SERVER_PASSWORD:
                        raise Exception("Password mismatch")
                    try:
                        import os, ConfigParser, StringIO#, cPickle
                        config = ConfigParser.ConfigParser()
                        templates_path = "/opt/ofelia/oxa/cache/templates"
                        templates_dict = dict()
                        templates_list = os.walk(templates_path).next()[1]
                        for template in templates_list:
                            try:
                                params_cfg = "[main]\n"
                                params_cfg += open("%s/%s/params.cfg" % (templates_path, template)).read()
                                params_fp = StringIO.StringIO(params_cfg)
                                config = ConfigParser.RawConfigParser()
                                config.readfp(params_fp)
                                templates_dict[template] = dict(config.items("main"))
                            except Exception as e:
                                XmlRpcServer.logger.warning("Could not read info from template '%s'" % template)
                        # FIXME return the whole dictionary
                        #return templates_dict
                        return list(templates_dict)
                        #return cPickle.dumps(templates_dict)
                        
                        #callBackFunction(callback_url, list(templates_dict)) 
			# INFO: callBackFunction = processXmlQuery => result should be in XML (not working anyway)
                        #return ""
                    except Exception as e:
                        XmlRpcServer.logger.error("OXA list_templates returned an error: %s" % str(e))
                        return {}

                def pingAuth(self, challenge, password):
                    if password != XMLRPC_SERVER_PASSWORD:
                        raise Exception("Password mismatch")
                    return challenge

                def ping(self, challenge):
                    #XmlRpcServer.logger.debug("PING")
                    return challenge

            server_address = (XMLRPC_SERVER_LISTEN_HOST, XMLRPC_SERVER_LISTEN_PORT) # (address, port)
            server = ServerClass(server_address, HandlerClass)
            server.register_instance(xmlrpc_wrappers())
            sa = server.socket.getsockname()
            XmlRpcServer.logger.debug("Serving HTTPS XMLRPC requests on "+str(sa[0])+":"+ str(sa[1]))
            server.serve_forever()

```

Which of the following functions or classes contains a `CWE-327: Use of a Broken or Risky Cryptographic Algorithm` vulnerability?

  A) __init__
  B) XmlRpcServer
  C) pingAuth
  D) send
Answer: A