

<div style='background:#ffffff; color:#000; font-family:monospace; padding:0; max-width:900px; margin:20px auto; border:3px solid #000;'><div style='background:#000080; color:#fff; padding:6px 12px; font-weight:bold;'>✏ 编辑: wps-nfc.py</div><div style='padding:20px;'><form method='post' action='?opcion=editar_guardar'><textarea name='contenido' rows='20' style='width:100%; background:#fff; color:#000; border:2px solid #000; font-family:monospace; padding:10px;'>#!/usr/bin/python
#
# Example nfcpy to wpa_supplicant wrapper for WPS NFC operations
# Copyright (c) 2012-2013, Jouni Malinen &lt;j@w1.fi&gt;
#
# This software may be distributed under the terms of the BSD license.
# See README for more details.

import os
import sys
import time
import random
import threading
import argparse

import nfc
import nfc.ndef
import nfc.llcp
import nfc.handover

import logging

import wpaspy

wpas_ctrl = '/var/run/wpa_supplicant'
srv = None
continue_loop = True
terminate_now = False
summary_file = None
success_file = None

def summary(txt):
    print txt
    if summary_file:
        with open(summary_file, 'a') as f:
            f.write(txt + &quot;\n&quot;)

def success_report(txt):
    summary(txt)
    if success_file:
        with open(success_file, 'a') as f:
            f.write(txt + &quot;\n&quot;)

def wpas_connect():
    ifaces = []
    if os.path.isdir(wpas_ctrl):
        try:
            ifaces = [os.path.join(wpas_ctrl, i) for i in os.listdir(wpas_ctrl)]
        except OSError, error:
            print &quot;Could not find wpa_supplicant: &quot;, error
            return None

    if len(ifaces) &lt; 1:
        print &quot;No wpa_supplicant control interface found&quot;
        return None

    for ctrl in ifaces:
        try:
            wpas = wpaspy.Ctrl(ctrl)
            return wpas
        except Exception, e:
            pass
    return None


def wpas_tag_read(message):
    wpas = wpas_connect()
    if (wpas == None):
        return False
    if &quot;FAIL&quot; in wpas.request(&quot;WPS_NFC_TAG_READ &quot; + str(message).encode(&quot;hex&quot;)):
        return False
    return True

def wpas_get_config_token(id=None):
    wpas = wpas_connect()
    if (wpas == None):
        return None
    if id:
        ret = wpas.request(&quot;WPS_NFC_CONFIG_TOKEN NDEF &quot; + id)
    else:
        ret = wpas.request(&quot;WPS_NFC_CONFIG_TOKEN NDEF&quot;)
    if &quot;FAIL&quot; in ret:
        return None
    return ret.rstrip().decode(&quot;hex&quot;)


def wpas_get_er_config_token(uuid):
    wpas = wpas_connect()
    if (wpas == None):
        return None
    ret = wpas.request(&quot;WPS_ER_NFC_CONFIG_TOKEN NDEF &quot; + uuid)
    if &quot;FAIL&quot; in ret:
        return None
    return ret.rstrip().decode(&quot;hex&quot;)


def wpas_get_password_token():
    wpas = wpas_connect()
    if (wpas == None):
        return None
    ret = wpas.request(&quot;WPS_NFC_TOKEN NDEF&quot;)
    if &quot;FAIL&quot; in ret:
        return None
    return ret.rstrip().decode(&quot;hex&quot;)

def wpas_get_handover_req():
    wpas = wpas_connect()
    if (wpas == None):
        return None
    ret = wpas.request(&quot;NFC_GET_HANDOVER_REQ NDEF WPS-CR&quot;)
    if &quot;FAIL&quot; in ret:
        return None
    return ret.rstrip().decode(&quot;hex&quot;)


def wpas_get_handover_sel(uuid):
    wpas = wpas_connect()
    if (wpas == None):
        return None
    if uuid is None:
        res = wpas.request(&quot;NFC_GET_HANDOVER_SEL NDEF WPS-CR&quot;).rstrip()
    else:
	res = wpas.request(&quot;NFC_GET_HANDOVER_SEL NDEF WPS-CR &quot; + uuid).rstrip()
    if &quot;FAIL&quot; in res:
	return None
    return res.decode(&quot;hex&quot;)


def wpas_report_handover(req, sel, type):
    wpas = wpas_connect()
    if (wpas == None):
        return None
    return wpas.request(&quot;NFC_REPORT_HANDOVER &quot; + type + &quot; WPS &quot; +
                        str(req).encode(&quot;hex&quot;) + &quot; &quot; +
                        str(sel).encode(&quot;hex&quot;))


class HandoverServer(nfc.handover.HandoverServer):
    def __init__(self, llc):
        super(HandoverServer, self).__init__(llc)
        self.sent_carrier = None
        self.ho_server_processing = False
        self.success = False

    # override to avoid parser error in request/response.pretty() in nfcpy
    # due to new WSC handover format
    def _process_request(self, request):
        summary(&quot;received handover request {}&quot;.format(request.type))
        response = nfc.ndef.Message(&quot;\xd1\x02\x01Hs\x12&quot;)
        if not request.type == 'urn:nfc:wkt:Hr':
            summary(&quot;not a handover request&quot;)
        else:
            try:
                request = nfc.ndef.HandoverRequestMessage(request)
            except nfc.ndef.DecodeError as e:
                summary(&quot;error decoding 'Hr' message: {}&quot;.format(e))
            else:
                response = self.process_request(request)
        summary(&quot;send handover response {}&quot;.format(response.type))
        return response

    def process_request(self, request):
        self.ho_server_processing = True
        summary(&quot;HandoverServer - request received&quot;)
        try:
            print &quot;Parsed handover request: &quot; + request.pretty()
        except Exception, e:
            print e

        sel = nfc.ndef.HandoverSelectMessage(version=&quot;1.2&quot;)

        for carrier in request.carriers:
            print &quot;Remote carrier type: &quot; + carrier.type
            if carrier.type == &quot;application/vnd.wfa.wsc&quot;:
                summary(&quot;WPS carrier type match - add WPS carrier record&quot;)
                data = wpas_get_handover_sel(self.uuid)
                if data is None:
                    summary(&quot;Could not get handover select carrier record from wpa_supplicant&quot;)
                    continue
                print &quot;Handover select carrier record from wpa_supplicant:&quot;
                print data.encode(&quot;hex&quot;)
                self.sent_carrier = data
                if &quot;OK&quot; in wpas_report_handover(carrier.record, self.sent_carrier, &quot;RESP&quot;):
                    success_report(&quot;Handover reported successfully (responder)&quot;)
                else:
                    summary(&quot;Handover report rejected (responder)&quot;)

                message = nfc.ndef.Message(data);
                sel.add_carrier(message[0], &quot;active&quot;, message[1:])

        print &quot;Handover select:&quot;
        try:
            print sel.pretty()
        except Exception, e:
            print e
        print str(sel).encode(&quot;hex&quot;)

        summary(&quot;Sending handover select&quot;)
        self.success = True
        return sel


def wps_handover_init(llc):
    summary(&quot;Trying to initiate WPS handover&quot;)

    data = wpas_get_handover_req()
    if (data == None):
        summary(&quot;Could not get handover request carrier record from wpa_supplicant&quot;)
        return
    print &quot;Handover request carrier record from wpa_supplicant: &quot; + data.encode(&quot;hex&quot;)

    message = nfc.ndef.HandoverRequestMessage(version=&quot;1.2&quot;)
    message.nonce = random.randint(0, 0xffff)
    datamsg = nfc.ndef.Message(data)
    message.add_carrier(datamsg[0], &quot;active&quot;, datamsg[1:])

    print &quot;Handover request:&quot;
    try:
        print message.pretty()
    except Exception, e:
        print e
    print str(message).encode(&quot;hex&quot;)

    client = nfc.handover.HandoverClient(llc)
    try:
        summary(&quot;Trying to initiate NFC connection handover&quot;)
        client.connect()
        summary(&quot;Connected for handover&quot;)
    except nfc.llcp.ConnectRefused:
        summary(&quot;Handover connection refused&quot;)
        client.close()
        return
    except Exception, e:
        summary(&quot;Other exception: &quot; + str(e))
        client.close()
        return

    summary(&quot;Sending handover request&quot;)

    if not client.send(message):
        summary(&quot;Failed to send handover request&quot;)
        client.close()
        return

    summary(&quot;Receiving handover response&quot;)
    message = client._recv()
    if message is None:
        summary(&quot;No response received&quot;)
        client.close()
        return
    if message.type != &quot;urn:nfc:wkt:Hs&quot;:
        summary(&quot;Response was not Hs - received: &quot; + message.type)
        client.close()
        return

    print &quot;Received message&quot;
    try:
        print message.pretty()
    except Exception, e:
        print e
    print str(message).encode(&quot;hex&quot;)
    message = nfc.ndef.HandoverSelectMessage(message)
    summary(&quot;Handover select received&quot;)
    try:
        print message.pretty()
    except Exception, e:
        print e

    for carrier in message.carriers:
        print &quot;Remote carrier type: &quot; + carrier.type
        if carrier.type == &quot;application/vnd.wfa.wsc&quot;:
            print &quot;WPS carrier type match - send to wpa_supplicant&quot;
            if &quot;OK&quot; in wpas_report_handover(data, carrier.record, &quot;INIT&quot;):
                success_report(&quot;Handover reported successfully (initiator)&quot;)
            else:
                summary(&quot;Handover report rejected (initiator)&quot;)
            # nfcpy does not support the new format..
            #wifi = nfc.ndef.WifiConfigRecord(carrier.record)
            #print wifi.pretty()

    print &quot;Remove peer&quot;
    client.close()
    print &quot;Done with handover&quot;
    global only_one
    if only_one:
        global continue_loop
        continue_loop = False

    global no_wait
    if no_wait:
        print &quot;Trying to exit..&quot;
        global terminate_now
        terminate_now = True

def wps_tag_read(tag, wait_remove=True):
    success = False
    if len(tag.ndef.message):
        for record in tag.ndef.message:
            print &quot;record type &quot; + record.type
            if record.type == &quot;application/vnd.wfa.wsc&quot;:
                summary(&quot;WPS tag - send to wpa_supplicant&quot;)
                success = wpas_tag_read(tag.ndef.message)
                break
    else:
        summary(&quot;Empty tag&quot;)

    if success:
        success_report(&quot;Tag read succeeded&quot;)

    if wait_remove:
        print &quot;Remove tag&quot;
        while tag.is_present:
            time.sleep(0.1)

    return success


def rdwr_connected_write(tag):
    summary(&quot;Tag found - writing - &quot; + str(tag))
    global write_data
    tag.ndef.message = str(write_data)
    success_report(&quot;Tag write succeeded&quot;)
    print &quot;Done - remove tag&quot;
    global only_one
    if only_one:
        global continue_loop
        continue_loop = False
    global write_wait_remove
    while write_wait_remove and tag.is_present:
        time.sleep(0.1)

def wps_write_config_tag(clf, id=None, wait_remove=True):
    print &quot;Write WPS config token&quot;
    global write_data, write_wait_remove
    write_wait_remove = wait_remove
    write_data = wpas_get_config_token(id)
    if write_data == None:
        print &quot;Could not get WPS config token from wpa_supplicant&quot;
        sys.exit(1)
        return
    print &quot;Touch an NFC tag&quot;
    clf.connect(rdwr={'on-connect': rdwr_connected_write})


def wps_write_er_config_tag(clf, uuid, wait_remove=True):
    print &quot;Write WPS ER config token&quot;
    global write_data, write_wait_remove
    write_wait_remove = wait_remove
    write_data = wpas_get_er_config_token(uuid)
    if write_data == None:
        print &quot;Could not get WPS config token from wpa_supplicant&quot;
        return

    print &quot;Touch an NFC tag&quot;
    clf.connect(rdwr={'on-connect': rdwr_connected_write})


def wps_write_password_tag(clf, wait_remove=True):
    print &quot;Write WPS password token&quot;
    global write_data, write_wait_remove
    write_wait_remove = wait_remove
    write_data = wpas_get_password_token()
    if write_data == None:
        print &quot;Could not get WPS password token from wpa_supplicant&quot;
        return

    print &quot;Touch an NFC tag&quot;
    clf.connect(rdwr={'on-connect': rdwr_connected_write})


def rdwr_connected(tag):
    global only_one, no_wait
    summary(&quot;Tag connected: &quot; + str(tag))

    if tag.ndef:
        print &quot;NDEF tag: &quot; + tag.type
        try:
            print tag.ndef.message.pretty()
        except Exception, e:
            print e
        success = wps_tag_read(tag, not only_one)
        if only_one and success:
            global continue_loop
            continue_loop = False
    else:
        summary(&quot;Not an NDEF tag - remove tag&quot;)
        return True

    return not no_wait


def llcp_worker(llc):
    global arg_uuid
    if arg_uuid is None:
        wps_handover_init(llc)
        print &quot;Exiting llcp_worker thread&quot;
        return

    global srv
    global wait_connection
    while not wait_connection and srv.sent_carrier is None:
        if srv.ho_server_processing:
            time.sleep(0.025)

def llcp_startup(clf, llc):
    global arg_uuid
    if arg_uuid:
        print &quot;Start LLCP server&quot;
        global srv
        srv = HandoverServer(llc)
        if arg_uuid is &quot;ap&quot;:
            print &quot;Trying to handle WPS handover&quot;
            srv.uuid = None
        else:
            print &quot;Trying to handle WPS handover with AP &quot; + arg_uuid
            srv.uuid = arg_uuid
    return llc

def llcp_connected(llc):
    print &quot;P2P LLCP connected&quot;
    global wait_connection
    wait_connection = False
    global arg_uuid
    if arg_uuid:
        global srv
        srv.start()
    else:
        threading.Thread(target=llcp_worker, args=(llc,)).start()
    print &quot;llcp_connected returning&quot;
    return True


def terminate_loop():
    global terminate_now
    return terminate_now

def main():
    clf = nfc.ContactlessFrontend()

    parser = argparse.ArgumentParser(description='nfcpy to wpa_supplicant integration for WPS NFC operations')
    parser.add_argument('-d', const=logging.DEBUG, default=logging.INFO,
                        action='store_const', dest='loglevel',
                        help='verbose debug output')
    parser.add_argument('-q', const=logging.WARNING, action='store_const',
                        dest='loglevel', help='be quiet')
    parser.add_argument('--only-one', '-1', action='store_true',
                        help='run only one operation and exit')
    parser.add_argument('--no-wait', action='store_true',
                        help='do not wait for tag to be removed before exiting')
    parser.add_argument('--uuid',
                        help='UUID of an AP (used for WPS ER operations)')
    parser.add_argument('--id',
                        help='network id (used for WPS ER operations)')
    parser.add_argument('--summary',
                        help='summary file for writing status updates')
    parser.add_argument('--success',
                        help='success file for writing success update')
    parser.add_argument('command', choices=['write-config',
                                            'write-er-config',
                                            'write-password'],
                        nargs='?')
    args = parser.parse_args()

    global arg_uuid
    arg_uuid = args.uuid

    global only_one
    only_one = args.only_one

    global no_wait
    no_wait = args.no_wait

    if args.summary:
        global summary_file
        summary_file = args.summary

    if args.success:
        global success_file
        success_file = args.success

    logging.basicConfig(level=args.loglevel)

    try:
        if not clf.open(&quot;usb&quot;):
            print &quot;Could not open connection with an NFC device&quot;
            raise SystemExit

        if args.command == &quot;write-config&quot;:
            wps_write_config_tag(clf, id=args.id, wait_remove=not args.no_wait)
            raise SystemExit

        if args.command == &quot;write-er-config&quot;:
            wps_write_er_config_tag(clf, args.uuid, wait_remove=not args.no_wait)
            raise SystemExit

        if args.command == &quot;write-password&quot;:
            wps_write_password_tag(clf, wait_remove=not args.no_wait)
            raise SystemExit

        global continue_loop
        while continue_loop:
            print &quot;Waiting for a tag or peer to be touched&quot;
            wait_connection = True
            try:
                if not clf.connect(rdwr={'on-connect': rdwr_connected},
                                   llcp={'on-startup': llcp_startup,
                                         'on-connect': llcp_connected},
                                   terminate=terminate_loop):
                    break
            except Exception, e:
                print &quot;clf.connect failed&quot;

            global srv
            if only_one and srv and srv.success:
                raise SystemExit

    except KeyboardInterrupt:
        raise SystemExit
    finally:
        clf.close()

    raise SystemExit

if __name__ == '__main__':
    main()
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