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vipaccess.py
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vipaccess.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2014 Forest Crossman
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import base64
import binascii
import hashlib
import hmac
import random
import string
import sys
import time
import urllib
import qrcode
import requests
from Crypto.Cipher import AES
from lxml import etree
from oath import totp
from oath import hotp
PROVISIONING_URL = 'https://services.vip.symantec.com/prov'
HMAC_KEY = '\xdd\x0b\xa6\x92\xc3\x8a\xa3\xa9\x93\xa3\xaa\x26\x96\x8c\xd9\xc2\xaa\x2a\xa2\xcb\x23\xb7\xc2\xd2\xaa\xaf\x8f\x8f\xc9\xa0\xa9\xa1'
TOKEN_ENCRYPTION_KEY = '\x01\xad\x9b\xc6\x82\xa3\xaa\x93\xa9\xa3\x23\x9a\x86\xd6\xcc\xd9'
REQUEST_TEMPLATE = '''<?xml version="1.0" encoding="UTF-8" ?>
<GetSharedSecret Id="%(timestamp)d" Version="2.0"
xmlns="http://www.verisign.com/2006/08/vipservice"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<TokenModel>%(token_model)s</TokenModel>
<ActivationCode></ActivationCode>
<OtpAlgorithm type="%(otp_algorithm)s"/>
<SharedSecretDeliveryMethod>%(shared_secret_delivery_method)s</SharedSecretDeliveryMethod>
<DeviceId>
<Manufacturer>%(manufacturer)s</Manufacturer>
<SerialNo>%(serial)s</SerialNo>
<Model>%(model)s</Model>
</DeviceId>
<Extension extVersion="auth" xsi:type="vip:ProvisionInfoType"
xmlns:vip="http://www.verisign.com/2006/08/vipservice">
<AppHandle>%(app_handle)s</AppHandle>
<ClientIDType>%(client_id_type)s</ClientIDType>
<ClientID>%(client_id)s</ClientID>
<DistChannel>%(dist_channel)s</DistChannel>
<ClientTimestamp>%(timestamp)d</ClientTimestamp>
<Data>%(data)s</Data>
</Extension>
</GetSharedSecret>'''
def generate_request(**request_parameters):
'''Generate a token provisioning request.'''
request_parameters['timestamp'] = request_parameters.get('timestamp',
int(time.time())
)
request_parameters['token_model'] = request_parameters.get(
'token_model',
# 'VSMT'
'VSMB'
)
request_parameters['otp_algorithm'] = request_parameters.get(
'otp_algorithm',
'HMAC-SHA1-TRUNC-6DIGITS'
)
request_parameters['shared_secret_delivery_method'] = request_parameters.get(
'shared_secret_delivery_method',
'HTTPS'
)
request_parameters['manufacturer'] = request_parameters.get(
'manufacturer',
'Apple Inc.'
)
request_parameters['serial'] = request_parameters.get(
'serial',
''.join([random.choice(string.digits + string.ascii_uppercase)
for x in range(0, 12)]
)
)
request_parameters['model'] = request_parameters.get(
'model',
# 'MacBookPro%d,%d' % (random.randint(1, 12), random.randint(1, 4))
'iPhone%d,%d' % (random.randint(1, 12), random.randint(1, 4))
)
request_parameters['app_handle'] = request_parameters.get(
'app_handle',
'iMac010200'
# 'TZAndroid2.2Test'
)
request_parameters['client_id_type'] = request_parameters.get(
'client_id_type',
# 'BOARDID'
'1'
)
request_parameters['client_id'] = request_parameters.get(
'client_id',
''.join([random.choice('0123456789')
for x in range(0, 16)]
)
# 'Mac-' + ''.join([random.choice('0123456789ABCDEF')
# for x in range(0, 16)]
# )
)
request_parameters['dist_channel'] = request_parameters.get(
'dist_channel',
'Symantec'
# 'Android Market'
)
request_parameters['platform'] = request_parameters.get(
'platform',
# 'iMac'
'iPhone'
)
request_parameters['os'] = request_parameters.get(
'os',
request_parameters['model']
)
data_before_hmac = '%(timestamp)d%(timestamp)d%(client_id_type)s%(client_id)s%(dist_channel)s' % request_parameters
request_parameters['data'] = base64.b64encode(
hmac.new(
HMAC_KEY,
data_before_hmac,
hashlib.sha256
).digest()
)
return REQUEST_TEMPLATE % request_parameters
def get_token_from_response(response_xml):
'''Retrieve relevant token details from Symantec's provisioning
response.'''
# Define an arbitrary namespace "vipservice" because xpath doesn't like it
# when it's "None"
namespace = {'vipservice':'http://www.verisign.com/2006/08/vipservice'}
tree = etree.fromstring(response_xml)
result = tree.xpath(
'//vipservice:Status/vipservice:StatusMessage',
namespaces=namespace
)[0].text
if result == 'Success':
token = {}
container = tree.xpath(
'//vipservice:SecretContainer',
namespaces=namespace
)[0]
encryption_method = container.xpath(
'//vipservice:EncryptionMethod',
namespaces=namespace
)[0]
token['salt'] = base64.b64decode(
encryption_method.xpath('//vipservice:PBESalt',
namespaces=namespace
)[0].text
)
token['iteration_count'] = int(
encryption_method.xpath(
'//vipservice:PBEIterationCount',
namespaces=namespace
)[0].text
)
token['iv'] = base64.b64decode(
encryption_method.xpath(
'//vipservice:IV',
namespaces=namespace
)[0].text
)
device = container.xpath('//vipservice:Device', namespaces=namespace)[0]
secret = device.xpath('//vipservice:Secret', namespaces=namespace)[0]
data = secret.xpath('//vipservice:Data', namespaces=namespace)[0]
token['id'] = secret.attrib['Id']
token['cipher'] = base64.b64decode(
data.xpath(
'//vipservice:Cipher',
namespaces=namespace
)[0].text
)
token['digest'] = base64.b64decode(
data.xpath(
'//vipservice:Digest',
namespaces=namespace
)[0].text
)
return token
def decrypt_key(token_iv, token_cipher):
'''Decrypt the OTP key using the hardcoded AES key.'''
decryptor = AES.new(TOKEN_ENCRYPTION_KEY, AES.MODE_CBC, token_iv)
decrypted = decryptor.decrypt(token_cipher)
# "decrypted" has PKCS#7 padding on it, so we need to remove that
num_bytes = ord(decrypted[-1])
otp_key = decrypted[:-num_bytes]
return otp_key
def generate_otp_uri(token_id, secret):
'''Generate the OTP URI.'''
token_parameters = {}
param = dict(
secret=base64.b32encode(secret).upper(),
issuer='Symantec'
)
if token_id.startswith('VSMB'):
param['count'] = '2'
token_parameters['otp_type'] = urllib.quote('hotp')
else:
token_parameters['otp_type'] = urllib.quote('totp')
token_parameters['app_name'] = urllib.quote('VIP Access')
token_parameters['account_name'] = urllib.quote(token_id)
token_parameters['parameters'] = urllib.urlencode(param)
return 'otpauth://%(otp_type)s/%(app_name)s:%(account_name)s?%(parameters)s' % token_parameters
def generate_qr_code(uri):
'''Generate a QR code from the OTP URI.'''
qr = qrcode.QRCode(
version=1,
error_correction=qrcode.constants.ERROR_CORRECT_L,
box_size=10,
border=4
)
qr.add_data(uri)
qr.make(fit=True)
im = qr.make_image()
im.show()
def check_token(token_id, secret):
'''Check the validity of the generated token.'''
if token_id.startswith('VSMB'):
otp = hotp(binascii.b2a_hex(secret),1).encode('utf-8')
else:
otp = totp(binascii.b2a_hex(secret)).encode('utf-8')
test_url = 'https://idprotect.vip.symantec.com/otpCheck'
token_check = requests.post(
test_url,
data=dict(
cred=token_id,
cr1=otp[0],
cr2=otp[1],
cr3=otp[2],
cr4=otp[3],
cr5=otp[4],
cr6=otp[5],
cr7="",
count="1",
)
)
if token_check.status_code != 200:
sys.stderr.write("Bad token check url, " + token_check.status_code + "\n")
return True
if "Your VIP Credential is working correctly" in token_check.text:
return True
else:
sys.stderr.write("bad otp \"" + otp + "\" : " + token_check.text + "\n")
return False
if __name__ == "__main__":
request = generate_request()
print request
response = requests.post(PROVISIONING_URL, data=request)
print response.content
otp_token = get_token_from_response(response.content)
otp_secret = decrypt_key(otp_token['iv'], otp_token['cipher'])
if not check_token(otp_token['id'], otp_secret):
sys.stderr.write("Something went wrong--the token is invalid.\n")
sys.exit(1)
otp_uri = generate_otp_uri(otp_token['id'], otp_secret)
print otp_uri
# generate_qr_code(otp_uri)