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from __future__ import absolute_import
import os
import sys
import ctypes.util
from ctypes import c_void_p, c_size_t, byref, create_string_buffer, CDLL
from . import JavaScriptInterpreter
from .encapsulated import template
# ------------------------------------------------------------------------------- #
class ChallengeInterpreter(JavaScriptInterpreter):
# ------------------------------------------------------------------------------- #
def __init__(self):
super(ChallengeInterpreter, self).__init__('chakracore')
# ------------------------------------------------------------------------------- #
def eval(self, body, domain):
chakraCoreLibrary = None
# check current working directory.
for _libraryFile in ['libChakraCore.so', 'libChakraCore.dylib', 'ChakraCore.dll']:
if os.path.isfile(os.path.join(os.getcwd(), _libraryFile)):
chakraCoreLibrary = os.path.join(os.getcwd(), _libraryFile)
continue
if not chakraCoreLibrary:
chakraCoreLibrary = ctypes.util.find_library('ChakraCore')
if not chakraCoreLibrary:
sys.tracebacklimit = 0
raise RuntimeError(
'ChakraCore library not found in current path or any of your system library paths, '
'please download from https://www.github.com/VeNoMouS/cloudscraper/tree/ChakraCore/, '
'or https://github.com/Microsoft/ChakraCore/'
)
try:
chakraCore = CDLL(chakraCoreLibrary)
except OSError:
sys.tracebacklimit = 0
raise RuntimeError('There was an error loading the ChakraCore library {}'.format(chakraCoreLibrary))
if sys.platform != 'win32':
chakraCore.DllMain(0, 1, 0)
chakraCore.DllMain(0, 2, 0)
script = create_string_buffer(template(body, domain).encode('utf-16'))
runtime = c_void_p()
chakraCore.JsCreateRuntime(0, 0, byref(runtime))
context = c_void_p()
chakraCore.JsCreateContext(runtime, byref(context))
chakraCore.JsSetCurrentContext(context)
fname = c_void_p()
chakraCore.JsCreateString(
'iuam-challenge.js',
len('iuam-challenge.js'),
byref(fname)
)
scriptSource = c_void_p()
chakraCore.JsCreateExternalArrayBuffer(
script,
len(script),
0,
0,
byref(scriptSource)
)
jsResult = c_void_p()
chakraCore.JsRun(scriptSource, 0, fname, 0x02, byref(jsResult))
resultJSString = c_void_p()
chakraCore.JsConvertValueToString(jsResult, byref(resultJSString))
stringLength = c_size_t()
chakraCore.JsCopyString(resultJSString, 0, 0, byref(stringLength))
resultSTR = create_string_buffer(stringLength.value + 1)
chakraCore.JsCopyString(
resultJSString,
byref(resultSTR),
stringLength.value + 1,
0
)
chakraCore.JsDisposeRuntime(runtime)
return resultSTR.value
# ------------------------------------------------------------------------------- #
ChallengeInterpreter()
|
