class QApplicationRunner(QObject):
""" Application runner starts application in own thread """
def __init__(self):
QObject.__init__(self)
self._thread = QThread()
self.moveToThread(self._thread)
self._thread.started.connect(self.start)
self._ev = Event()
self._app = None
self._thread.start()
@Slot()
def start(self):
self.app = Application()
self._ev.set()
self.app.exec_()
def exit(self):
self.app.exit() # perform polite disposal of resources
if self._thread.isRunning():
self._thread.wait(1000) # wait 1 sec
self._thread.terminate() # no-way
@property
def app(self):
if not self._ev.isSet():
self._ev.wait()
return self._app
@app.setter
def app(self, app):
self._app = app
class QWebPageRunner(QObject):
""" Web page runner starts WebPage instances in one separate thread and implements custom event loop. """
#FIXME: consider using QEventLoop instead
def __init__(self, app):
QObject.__init__(self)
self._thread = QThread()
self.moveToThread(self._thread)
self._thread.started.connect(self.start)
self._destroying = Event()
self._destroying.clear()
self._result = None
self._commandQueue = Queue()
self._app = app
self._thread.start()
@Slot()
def start(self):
try:
while not self._destroying.is_set():
self._app.processEvents()
try:
cmd = self._commandQueue.get(timeout=0.1)
args = ()
if isinstance(cmd, tuple):
if not len(cmd):
continue
args = cmd[1:]
cmd = cmd[0]
if isinstance(cmd, NewPage):
args = (self._app,)
if isinstance(cmd, Command):
cmd(*args)
else:
raise ValueError('Unknown command %s(%s).' % (cmd, args))
except Empty:
pass
except Exception as e:
logger.exception(e)
def exit(self):
self._destroying.set()
if self._thread.isRunning():
self._thread.wait(1000) # wait 1 sec
self._thread.terminate() # no-way
def invoke(self, cmd, *args):
if isinstance(cmd, type) and issubclass(cmd, Command):
cmd = cmd()
if not isinstance(cmd, Command):
cmd = Command(cmd)
cmd.event.clear()
self._commandQueue.put((cmd,)+args)
while not cmd.event.is_set():
self._app.processEvents()
cmd.event.wait(0.1)
return cmd.result
class Progress(QWidget, ProgressGui.Ui_Progress):
# Signals
completeProcessSig = Signal(str)
endProcessEarlySig = Signal()
"""
--------------------------------------------------------------------------------------------------------------------
Constructor method
--------------------------------------------------------------------------------------------------------------------
"""
def __init__(self,
mode,
algo_type,
key,
keysize,
ciphertext_file_path,
plaintext_file_path,
parent=None):
super(Progress, self).__init__(parent)
self.setupUi(self)
self.setWindowTitle(ApplicationStrings.APPLICATION_NAME)
self.setFixedSize(500, 135)
# set values from those passed in
self.mode = mode
self.algo_type = algo_type
self.key = key
self.keysize = keysize
self.ciphertext_file_path = ciphertext_file_path
self.plaintext_file_path = plaintext_file_path
# create empty holders
self.init_vector = None
self.cipher = None
self.cipher_process = None
self.monitor_progress_thread = None
self.progress_monitor = None
# create Values to be shared between processes
self.end_process_early = Value('i', 0)
self.percent_done = Value('d', 0.0)
self.pause_requested = Value('i', 0)
self.paused = Value('i', 0)
self.pause_sig_sent = Value('i', 0)
# connect cancel btn signal and slot
self.cancel_btn.clicked.connect(self.requestPause)
# create the Value objects shared between processes
self.setGuiValues()
# create the initialization vector
self.createInitVector()
# create an instance of the appropriate cipher
self.createCipher()
# create and setup the monitor class
self.setupMonitor()
# create the Process that the Cipher will run in
self.createCipherProcess()
"""
--------------------------------------------------------------------------------------------------------------------
Set the Gui Labels from data passed into constructor
--------------------------------------------------------------------------------------------------------------------
"""
def setGuiLabels(self):
if self.mode == 'encryption':
self.title_label.setText('Encrypting File: %s' \
% self.plaintext_file_path[:3]+'.../'+self.plaintext_file_path.split('/')[-1])
elif self.mode == 'decryption':
self.title_label.setText('Decrypting File: %s' \
% self.ciphertext_file_path[:3]+'.../'+self.ciphertext_file_path.split('/')[-1])
self.key_label.setText('Key: %s' % binascii.hexlify(self.key).decode())
self.progress_bar.reset()
"""
--------------------------------------------------------------------------------------------------------------------
Create the Initialization vector
--------------------------------------------------------------------------------------------------------------------
"""
def createInitVector(self):
if kr.getFromKeyring('iv_source', 'admin') is None:
self.init_vector = 1
else:
self.init_vector = int(kr.getFromKeyring('iv_source', 'admin')) + 1
kr.saveToKeyring('iv_source', 'admin', str(self.init_vector))
self.init_vector = hashlib.sha256(str(self.init_vector).encode('utf-8')).hexdigest()
self.init_vector = bytearray.fromhex(self.init_vector)[:16]
"""
--------------------------------------------------------------------------------------------------------------------
Create the Cipher Algorithm
--------------------------------------------------------------------------------------------------------------------
"""
def createCipher(self):
if self.algo_type == 'aes':
self.cipher = AesCipher(self.keysize,
self.plaintext_file_path,
self.ciphertext_file_path,
self.init_vector,
self.key)
elif self.algo_type == '3es':
print('3es')
elif self.algo_type == 'des':
print('des')
"""
--------------------------------------------------------------------------------------------------------------------
Setup the monitor class and move to its own thread
--------------------------------------------------------------------------------------------------------------------
"""
def setupMonitor(self):
self.monitor_progress_thread = QThread()
self.progress_monitor = ProgressMonitor(self.percent_done,
self.paused,
self.pause_sig_sent,
self.end_process_early)
self.progress_monitor.moveToThread(self.monitor_progress_thread)
# connect signals and slots
self.monitor_progress_thread.started.connect(self.progress_monitor.beginMonitoring)
self.progress_monitor.updateProcessSig.connect(self.update)
self.progress_monitor.endProcessEarlySig.connect(self.endEarly)
self.progress_monitor.endProcessSig.connect(self.complete)
self.progress_monitor.pauseSig.connect(self.showCancelMessage)
"""
--------------------------------------------------------------------------------------------------------------------
Create the Cipher Process and set the target to the appropriate method in the Cipher instance
--------------------------------------------------------------------------------------------------------------------
"""
def createCipherProcess(self):
if self.mode == 'encryption':
self.cipher_process = Process(target=self.cipher.encrypt, args=(self.percent_done,
self.pause_requested,
self.paused))
elif self.mode == 'decryption':
self.cipher_process = Process(target=self.cipher.decrypt, args=(self.percent_done,
self.pause_requested,
self.paused))
"""
--------------------------------------------------------------------------------------------------------------------
Begin the encryption/decryption process and start the monitoring thread
--------------------------------------------------------------------------------------------------------------------
"""
def begin(self):
self.monitor_progress_thread.start()
self.cipher_process.start()
"""
--------------------------------------------------------------------------------------------------------------------
Update the progress bar with values from the encryption/decryption process
--------------------------------------------------------------------------------------------------------------------
"""
def update(self, percent_done):
self.progress_bar.setValue(percent_done)
"""
--------------------------------------------------------------------------------------------------------------------
request the process to pause
--------------------------------------------------------------------------------------------------------------------
"""
def requestPause(self):
self.pause_requested.value = 1
"""
--------------------------------------------------------------------------------------------------------------------
show the cancel message
--------------------------------------------------------------------------------------------------------------------
"""
def showCancelMessage(self):
msgBox = QMessageBox()
msgBox.setText("Are You Sure You Want To Cancel %s" % self.mode)
msgBox.setStandardButtons(QMessageBox.Ok | QMessageBox.Cancel)
msgBox.setDefaultButton(QMessageBox.Cancel)
ret = msgBox.exec_()
if ret == QMessageBox.Ok:
self.end_process_early.value = 1
elif ret == QMessageBox.Cancel:
self.paused.value = 0
self.pause_requested.value = 0
self.pause_sig_sent.value = 0
self.pause_requested.value = 0
"""
--------------------------------------------------------------------------------------------------------------------
Complete encryption / decryption when done
--------------------------------------------------------------------------------------------------------------------
"""
def complete(self):
self.cipher = None
# terminate the update progress thread
self.monitor_progress_thread.terminate()
while self.monitor_progress_thread.isRunning():
time.sleep(0.01)
# terminate the cipher process
self.cipher_process.terminate()
while self.cipher_process.is_alive():
time.sleep(0.01)
self.close()
# create the filepath to send back to the message box
fp = ''
if self.mode == 'encryption':
fp = self.ciphertext_file_path
elif self.mode == 'decryption':
fp = self.plaintext_file_path
# emit Signal
self.completeProcessSig.emit(fp)
"""
--------------------------------------------------------------------------------------------------------------------
Cancel the encryption / decryption before completion
--------------------------------------------------------------------------------------------------------------------
"""
def endEarly(self):
self.cipher = None
# terminate the update progress thread
self.monitor_progress_thread.terminate()
while self.monitor_progress_thread.isRunning():
time.sleep(0.01)
# terminate the cipher process
self.cipher_process.terminate()
while self.cipher_process.is_alive():
time.sleep(0.01)
self.close()
# emit Signal
self.endProcessEarlySig.emit()
