def send_tree(self, chan: paramiko.Channel, path: str) -> typing.Tuple[list, list]:
"""
Request a "send tree" request to the client given a channel and path
:param chan: Channel to send the request for
:param file_path: Path of the request
:return: Dirs and files in the tree
"""
chan.send(self.SEND_TREE)
logging.debug("TREE:tree request sent")
size = len(path)
size = str(size)
size += '.' * int((64 - len(size)))
chan.send(str(size))
logging.debug("TREE:tree size sent")
chan.send(path)
logging.debug("TREE:tree path sent")
logging.debug("TREE:waiting for size")
size = chan.recv(64)
logging.debug("TREE:got size")
size = size.decode('utf-8')
size = size.replace('.', '')
logging.debug("TREE:wating for tree")
raw_tree = chan.recv(int(size))
logging.debug("TREE:got tree")
dirs, files = pickle.loads(raw_tree)
return dirs, files
def make_interactive(
channel: paramiko.Channel
) -> typing.Tuple[int, typing.BinaryIO, typing.BinaryIO]:
"""
Manages an interactive command
Takes in a paramiko.Channel shared by stdin, stdout, stderr of a currently running command
The current interpreter stdin is duplicated and written to the command's stdin
The command's stdout and stderr are written to the interpreter's stdout and stderr
and also buffered in a ByteStream for later reading
Returns (exit status, Stdout buffer, Stderr bufer)
"""
infd = sys.stdin.fileno()
channelfd = channel.fileno()
poll = select.poll()
poll.register(
infd, select.POLLIN + select.POLLPRI + select.POLLERR + select.POLLHUP)
poll.register(
channelfd,
select.POLLIN + select.POLLPRI + select.POLLERR + select.POLLHUP)
stdout = io.BytesIO()
stderr = io.BytesIO()
while not channel.exit_status_ready():
for fd, event in poll.poll(0.5):
if fd == infd and event & (select.POLLIN + select.POLLPRI):
# Text available on python stdin
channel.send(os.read(infd, 4096))
if channel.recv_ready():
content = channel.recv(4096)
sys.stdout.write(content.decode())
sys.stdout.flush()
stdout.write(content)
if channel.recv_stderr_ready():
content = channel.recv_stderr(4096)
sys.stderr.write(content.decode())
sys.stderr.flush()
stderr.write(content)
if channel.recv_ready():
content = channel.recv(4096)
sys.stdout.write(content.decode())
sys.stdout.flush()
stdout.write(content)
if channel.recv_stderr_ready():
content = channel.recv_stderr(4096)
sys.stderr.write(content.decode())
sys.stderr.flush()
stderr.write(content)
stdout.seek(0, 0)
stderr.seek(0, 0)
return channel.recv_exit_status(), stdout, stderr
def read_out(chan: paramiko.Channel, wait_time=1) -> str:
now = time.time()
out = ''
while True:
while chan.recv_ready():
data = chan.recv(256).decode('utf-8')
out = out + data
sys.stdout.write(data)
# and time.time() - now > 3
while not chan.recv_ready() and time.time() - now > wait_time:
return out
def _initiate_channel(self, channel: paramiko.Channel, email: str):
"""
Initiates channel with given channel object and email
:param channel: SSH Channel object
:param email: user's email
"""
data = channel.recv(5)
data = data.decode("utf-8")
logging.debug("Data recived: {data}".format(data=data))
if data == self.READY:
size = channel.recv(64)
size = size.decode('utf-8')
size = size.replace('.', '')
name = channel.recv(int(size))
setattr(channel,"anylink_name",name.decode('utf-8'))
channel.send(self.CONFIRM_READY)
self.channels[channel] = email
else:
channel.close()
def send_file(self, chan: paramiko.Channel, file_path: str) -> bool:
"""
Request a "send file" request to the client given a channel and file path
:param chan: Channel to send the request for
:param file_path: Path of the file of the request
:return: File transfer succeeded/faild - True/False
"""
chan.send(self.SEND_FILE)
size = str(len(file_path))
size += '.' * int((64 - len(size)))
chan.send(str(size))
chan.send(file_path)
size = chan.recv(64)
size = size.decode('utf-8')
size = size.replace('.', '')
msg = chan.recv(int(size))
msg = msg.decode('utf-8')
logging.debug("Message recived: {msg}".format(msg=msg))
if msg == "finishfile":
return True
return False
def right_forwarder(channel: Channel, local_port: int):
selector = selectors.DefaultSelector()
def from_localhost():
data = sock.recv(1024)
if len(data) == 0:
return data
channel.send(data)
return data
def to_localhost():
data = sock.recv(1024)
if len(data) == 0:
return data
channel.send(data)
return data
selector.register(socket, selectors.EVENT_READ, from_localhost)
selector.register(channel, selectors.EVENT_READ, to_localhost)
# connect to localhost via sockets
sock = socket.socket()
try:
sock.connect((LOCALHOST, local_port))
except Exception as e:
logger.error(f'Forwarding request to {local_port} failed: e')
return
# read data from channel or socket and send to opposite site
while True:
r, _, _ = select.select([sock, channel], [], [])
if sock in r:
data = sock.recv(1024)
if len(data) == 0:
break
channel.send(data)
if channel in r:
data = channel.recv(1024)
if len(data) == 0:
break
sock.send(data)
channel.close()
sock.close()
logger.info(f'Tunnel closed from {channel.origin_addr}')