624 lines
16 KiB
Python
624 lines
16 KiB
Python
import SocketServer
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import threading
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import socket
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from random import randint
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import datetime
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def mask(rights):
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m = ""
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if rights&4 != 0:
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m += "r"
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else:
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m += "-"
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if rights&2 != 0:
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m += "w"
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else:
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m += "-"
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if rights&1 != 0:
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m += "x"
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else:
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m+= "-"
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return m
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class FSNode:
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def __init__(self,name,owner="nobody",group="nobody",rights=384,size=0, iun=1):
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self.name = name
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self.owner = owner
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self.group = group
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self.rights = rights
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self.size = size
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self.parent = None
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self.iun = iun
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def is_dir(self):
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return False
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def is_file(self):
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return False
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def get_name(self):
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return self.name
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def get_size(self):
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return self.size
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def get_rights(self):
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return self.rights
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def get_last_change(self):
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return datetime.date(2013,8,22)
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#Thanks to a mumble session with lod :3
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def get_boner(self):
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return "large"
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def get_parent_directory(self):
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return self.parent
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def get_owner(self):
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return self.owner
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def get_group(self):
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return self.group
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def get_imaginary_unicorn_number(self):
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return self.iun
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def get_mask(self):
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m = ""
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if self.is_dir():
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m += "d"
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else:
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m += "-"
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rights = self.get_rights()
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m += mask((rights >> 6)&7)
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m += mask((rights >> 3)&7)
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m += mask(rights&7)
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return m
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def get_absolute_path(self):
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if self.parent is None:
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if self.is_dir():
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return "/"
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else:
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return self.get_name()
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else:
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p = self.parent.get_absolute_path()
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if p[-1] != "/":
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p+= "/"
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p+=self.get_name()
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return p
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class Directory(FSNode):
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def __init__(self,name,owner="nobody",group="nobody",rights=384,size=4096,files=[]):
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FSNode.__init__(self, name=name, owner=owner, group=group,rights=rights, size=size, iun=randint(2,10))
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self.files = files
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for f in self.files:
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f.parent = self
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def is_dir(self):
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return True
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def get_node(self,name):
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for f in self.files:
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if f.name == name:
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return f
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return None
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class File(FSNode):
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def __init__(self,name,owner="nobody",group="nobody",rights=384,size=4096, content=None):
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FSNode.__init__(self, name=name, owner=owner, group=group,rights=rights, size=size, iun=1)
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if content is None:
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content = TextFileContent()
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self.content = content
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def is_file(self):
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return True
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def send_content(self,socket):
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self.content.send_content(socket)
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class FileContent:
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def send_content(self, socket):
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pass
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class TextFileContent(FileContent):
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def __init__(self, text=""):
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self.text = text
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def send_content(self, socket):
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socket.send(self.text)
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class FileFileContent(FileContent):
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def __init__(self, filepath):
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self.filepath = filepath
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def send_content(self, socket):
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fh = file(self.filepath,"r")
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buf = fh.read(1024)
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while len(buf) > 0:
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socket.send(buf)
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buf = fh.read(1024)
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class HoneypotFileContent(FileContent):
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def send_content(self, socket):
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for i in range(4000):
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socket.send('HONEYPOT');
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class URandomFileContent(FileFileContent):
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def __init__(self):
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FileFileContent.__init__(self, "/dev/urandom")
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class DataConnection:
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def run(self, dchandler):
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pass
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class PassiveDataConnection(DataConnection):
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def __init__(self, port):
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.socket.bind(("",port))
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self.connection = None
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threading.Thread(target=self.waitForConnection).start()
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def waitForConnection(self):
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self.socket.listen(1)
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self.connection, _ = self.socket.accept()
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def run(self, dchandler):
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while self.connection is None:
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pass
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threading.Thread(target=self.runHandler, args=(dchandler,) ).start()
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def runHandler(self, dchandler):
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dchandler.handle(self.connection)
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self.connection.close()
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class ActiveDataConnection(DataConnection):
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def __init__(self, addr):
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self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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self.socket.connect( addr )
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def run(self, dchandler):
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threading.Thread(target=self.runHandler, args=(dchandler,)).start()
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def runHandler(self, dchandler):
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dchandler.handle(self.socket)
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self.socket.close()
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class FailAuthorizer:
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'''Default authorizer. Denys all logins'''
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def authorize(self, username, password, handler):
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return False
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class AnonymousAuthorizer:
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def authorize(self, username, password, handler):
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if username in ["ftp","anonymous"]:
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return True
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else:
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return False
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class FTPMessage:
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'''Parses and creates FTP Messages'''
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def __init__(self,cmd,parameter):
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self.cmd = cmd
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self.parameter = parameter
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def generate(self):
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return "%s %s\r\n" % (self.cmd.upper(), self.parameter)
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def __str__(self):
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return self.generate()
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@staticmethod
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def parse(line):
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pos = line.find(" ")
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if pos == -1:
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cmd = line
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param = None
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else:
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cmd = line[:pos]
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param = line[pos+1:]
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return FTPMessage(cmd.upper(),param)
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class QuitMessage(FTPMessage):
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'''Message sent to client when client wants to disconnect'''
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def __init__(self):
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FTPMessage.__init__(self,"221","Goodbye.")
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class InvalidCommandMessage(FTPMessage):
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'''Message sent to client when server received message it didn't understand'''
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def __init__(self,cmd):
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FTPMessage.__init__(self,"500","%s not understood" % cmd)
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class PasswordRequiredMessage(FTPMessage):
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'''Message sent to client when it specified a username'''
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def __init__(self,user):
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FTPMessage.__init__(self,"331","Password required for %s" % user)
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class AuthorizationSuccessfulMessage(FTPMessage):
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'''Message sent to client when authorization was successful'''
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def __init__(self):
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FTPMessage.__init__(self,"230","Welcome user.")
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class AuthorizationFailedMessage(FTPMessage):
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'''Message sent to client when authorization failed'''
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def __init__(self):
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FTPMessage.__init__(self,"530","Login incorrect.")
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class WelcomeMessage(FTPMessage):
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'''Message sent to client after client has connected'''
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def __init__(self):
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FTPMessage.__init__(self,"220","FTP Server ready")
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class EnteringPassiveModeMessage(FTPMessage):
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def __init__(self,addrtuple):
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FTPMessage.__init__(self,"227","Entering Passive Mode %s." % addrtuple)
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class BeginDirectoryListingMessage(FTPMessage):
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def __init__(self):
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FTPMessage.__init__(self,"150","Here comes the directory listing.")
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class EndDirectoryListingMessage(FTPMessage):
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def __init__(self):
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FTPMessage.__init__(self,"226","Directory send OK.")
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class WorkingDirectoryMessage(FTPMessage):
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def __init__(self, workingDirectory):
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FTPMessage.__init__(self,"257","\"%s\" is the current directory" % workingDirectory)
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class ChangeDirectorySuccessfulMessage(FTPMessage):
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def __init__(self):
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FTPMessage.__init__(self,"250","command successful")
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class ChangeDirectoryFailedMessage(FTPMessage):
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def __init__(self):
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FTPMessage.__init__(self,"550","No such directory")
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class InvalidParametersMessage(FTPMessage):
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def __init__(self):
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FTPMessage.__init__(self,"504","Command not implemented for that parameter")
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class InvalidPortCommandMessage(FTPMessage):
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def __init__(self):
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FTPMessage.__init__(self,"500","Illegal port command")
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class CommandSuccessfulMessage(FTPMessage):
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def __init__(self,cmd):
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FTPMessage.__init__(self,"200","%s command successful" % cmd)
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class OperationNotPermittedMessage(FTPMessage):
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def __init__(self):
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FTPMessage.__init__(self,"550","Operation not permitted")
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class TypeSetMessage(FTPMessage):
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def __init__(self,val):
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FTPMessage.__init__(self,"200","Type set to %s" % val)
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class BeginFileRetrieve(FTPMessage):
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def __init__(self,node):
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FTPMessage.__init__(self,"150","Opening ASCII mode data connection for %s (%d bytes)" % (node.get_name(),node.get_size()))
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class EndFileRetrieve(FTPMessage):
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def __init__(self):
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FTPMessage.__init__(self,"226","Transfer complete")
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# Data Connection Handler
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class NListHandler:
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def __init__(self, directory, handler):
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self.directory = directory
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self.handler = handler
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def handle(self, socket):
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for f in self.directory.files:
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socket.send(f.get_name()+"\n")
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class ListHandler:
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def __init__(self, directory, handler):
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self.directory = directory
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self.handler = handler
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def handle(self, socket):
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self.handler.send( BeginDirectoryListingMessage() )
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for f in self.directory.files:
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socket.send( "%10s %3d %-8s %-8s %8d %3s %2d %5d %s\n" % (
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f.get_mask(),
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f.get_imaginary_unicorn_number(),
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f.get_owner(),
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f.get_group(),
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f.get_size(),
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f.get_last_change().strftime("%b"),
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f.get_last_change().day,
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f.get_last_change().year,
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f.get_name()
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) )
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self.handler.send( EndDirectoryListingMessage() )
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class RetrieveHandler:
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def __init__(self, node, handler):
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self.node = node
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self.handler = handler
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def handle(self, socket):
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self.handler.send( BeginFileRetrieve(self.node) )
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self.node.send_content(socket)
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self.handler.send( EndFileRetrieve() )
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# State classes
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class State:
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def process(self, handler, message):
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pass
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class MainState(State):
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def process(self, handler, message):
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if message.cmd == "QUIT":
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handler.send( QuitMessage() )
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handler.running = False
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else:
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handler.send( InvalidCommandMessage(message.cmd) )
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class NonAuthorizedState(MainState):
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def process(self, handler, message):
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if message.cmd == "USER":
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handler.user = message.parameter
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handler.state = AuthorizingState()
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handler.send( PasswordRequiredMessage(handler.user) )
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else:
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MainState.process(self, handler, message)
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class AuthorizingState(MainState):
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def process(self, handler, message):
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if message.cmd == "PASS":
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password = message.parameter
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if handler.authorizer.authorize(handler.user, password, handler):
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handler.debug("User login %s successful" % handler.user)
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handler.state = AuthorizedState()
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handler.send( AuthorizationSuccessfulMessage() )
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else:
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handler.debug("User login %s failed" % handler.user)
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handler.state = NonAuthorizedState()
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handler.send( AuthorizationFailedMessage() )
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else:
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MainState.process(self, handler, message)
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class AuthorizedState(MainState):
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def addrtuple(self, ip, port):
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b = ip.split(".")
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b.append( str( (port >> 8) & 0xFF ) )
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b.append( str( port & 0xFF ) )
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return "(" + ",".join(b)+ ")"
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def process(self, handler, message):
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if message.cmd == "PASV":
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port = handler.createPassiveDataConnection()
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handler.debug("Created passive data connection")
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handler.send( EnteringPassiveModeMessage( self.addrtuple("127.0.0.1",port) ) )
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elif message.cmd in ["DELE","RMD","RNFR","RNTO","STOR"]:
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handler.send( OperationNotPermittedMessage() )
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elif message.cmd == "RETR":
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node = handler.get_node(message.parameter)
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if node.is_file():
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handler.runDataConnection( RetrieveHandler(node, handler) )
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else:
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handler.send( OperationNotPermittedMessage() )
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elif message.cmd == "PORT":
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hp = message.parameter.split(",")
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if len(hp) != 6:
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handler.debug( "Invalid port information" )
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handler.send( InvalidParametersMessage() )
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return
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if int(hp[0]) == 10 or int(hp[0]) == 127 or int(hp[0]) == 192: #Prevent local scanning
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handler.send( InvalidPortCommandMessage() )
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return
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addr = ( ".".join(hp[:4]), int(hp[4])<<8+int(hp[5]) )
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handler.createActiveDataConnection(addr)
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handler.debug("Created active data connection to %s:%d" % addr)
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handler.send( CommandSuccessfulMessage("PORT") )
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elif message.cmd == "LIST":
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handler.debug("Listing current directory")
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if handler.runDataConnection(ListHandler(handler.currentDirectory, handler)):
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handler.debug("successful")
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else:
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handler.debug("failed")
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elif message.cmd == "NLST":
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handler.debug("Listing current directory (simple)")
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if handler.runDataConnection(NListHandler(handler.currentDirectory)):
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handler.debug("successful")
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else:
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handler.debug("failed")
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elif message.cmd == "CWD":
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node = handler.get_node(message.parameter)
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if node is None or not node.is_dir():
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handler.debug("Error trying to switch into non-existent directory")
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handler.send( ChangeDirectoryFailedMessage() )
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else:
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handler.currentDirectory = node
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handler.debug("Changed working directory to "+node.get_absolute_path())
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handler.send( ChangeDirectorySuccessfulMessage() )
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elif message.cmd == "CDUP":
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node = handler.currentDirectory.get_parent_directory()
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if node is None or not node.is_dir():
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handler.debug("Error trying to switch to parent directory")
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else:
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handler.debug("Changed working directory to "+node.get_absolute_path())
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handler.currentDirectory = node
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handler.send( ChangeDirectorySuccessfulMessage() )
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elif message.cmd == "PWD":
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handler.send( WorkingDirectoryMessage(handler.currentDirectory.get_absolute_path()) )
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elif message.cmd == "TYPE":
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if message.parameter == "A":
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handler.send( TypeSetMessage(message.parameter) )
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else:
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handler.send( InvalidCommandMessage("TYPE") )
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elif message.cmd == "NOOP":
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handler.send( CommandSuccessfulMessage("NOOP") )
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else:
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MainState.process(self, handler, message)
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class LineReader:
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def __init__(self):
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self.buf = ""
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def push(self,data):
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self.buf += data
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def get_lines(self):
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pos = self.buf.find("\n")
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while pos != -1:
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line = self.buf[:pos]
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if line[-1] == "\r":
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line = line[:-1]
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yield line
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self.buf = self.buf[pos+1:]
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pos = self.buf.find("\n")
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class FTPHandler(SocketServer.BaseRequestHandler):
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def debug(self, text):
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print ("[%s] " % self.client_address[0]) + text
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def send(self, message):
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line = str(message)
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self.debug("< "+line)
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self.request.send( line )
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def createPassiveDataConnection(self):
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port = randint(60000,63000)
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self.connection = PassiveDataConnection(port)
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return port
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def createActiveDataConnection(self,addr):
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self.connection = ActiveDataConnection(addr)
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def get_node(self,path):
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if path == "/":
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return self.rootDirectory
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if path[0] == "/":
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cnode = self.rootDirectory
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path = path[1:]
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else:
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cnode = self.currentDirectory
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if path[-1] == "/":
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path = path[:-1]
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parts = path.split("/")
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for part in parts:
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if cnode == None or not cnode.is_dir():
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return None
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cnode = cnode.get_node(part)
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return cnode
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def runDataConnection(self, dchandler):
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if self.connection is None:
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return False
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else:
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self.connection.run(dchandler)
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self.connection = None
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return True
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def handle(self):
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self.currentDirectory = self.rootDirectory
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self.connection = None
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self.state = NonAuthorizedState()
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self.debug("Client connected");
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self.send( WelcomeMessage() )
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linereader = LineReader()
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self.running = True
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while self.running:
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data = self.request.recv(1024)
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if len(data) == 0:
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break
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linereader.push(data)
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for line in linereader.get_lines():
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self.debug("> "+line)
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message = FTPMessage.parse(line)
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self.state.process(self,message)
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self.debug("Client disconnected")
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handler = FTPHandler
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handler.authorizer = AnonymousAuthorizer()
|
|
|
|
recdir = Directory("recursive",files=[
|
|
File("is")
|
|
])
|
|
recdir.files.append(recdir)
|
|
|
|
handler.rootDirectory = Directory("",files=[
|
|
Directory("etc", files=[
|
|
File("passwd",content=URandomFileContent()),
|
|
File("shadow",content=URandomFileContent()),
|
|
recdir
|
|
]),
|
|
Directory("usr", files=[
|
|
Directory("share"),
|
|
Directory("bin", files=[
|
|
File("sh")
|
|
])
|
|
]),
|
|
Directory("home", files=[
|
|
Directory("john",owner="john"),
|
|
Directory("jane",owner="jane"),
|
|
Directory("peter",owner="peter")
|
|
]),
|
|
Directory("root", files=[
|
|
Directory("ssh",files=[
|
|
File("authorized_keys",content=URandomFileContent())
|
|
]),
|
|
File("db.dump", content=URandomFileContent())
|
|
]),
|
|
Directory("dev"),
|
|
Directory("mnt"),
|
|
Directory("var", files=[
|
|
Directory("www")
|
|
]),
|
|
Directory("bin"),
|
|
Directory("tmp"),
|
|
Directory("lost+found"),
|
|
Directory("boot"),
|
|
Directory("lib"),
|
|
Directory("lib32"),
|
|
Directory("proc"),
|
|
Directory("src"),
|
|
File("vmlinuz",size=4000000),
|
|
Directory("selinux"),
|
|
Directory("opt"),
|
|
File("initrd.img",size=4000000)
|
|
])
|
|
|
|
port = 1234
|
|
while True:
|
|
try:
|
|
server = SocketServer.ThreadingTCPServer(("",port),handler)
|
|
print "Listening on port %d" % port
|
|
server.serve_forever()
|
|
break
|
|
except Exception:
|
|
if port < 1500:
|
|
port += 1
|
|
else:
|
|
print "Failed to find a port"
|
|
break |