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PyBitmessage/src/bitmessagemain.py

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#!/usr/bin/env python2.7
# Copyright (c) 2012 Jonathan Warren
# Copyright (c) 2012 The Bitmessage developers
# Distributed under the MIT/X11 software license. See the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
#Right now, PyBitmessage only support connecting to stream 1. It doesn't yet contain logic to expand into further streams.
#The software version variable is now held in shared.py
verbose = 1
maximumAgeOfAnObjectThatIAmWillingToAccept = 216000 #Equals two days and 12 hours.
lengthOfTimeToLeaveObjectsInInventory = 237600 #Equals two days and 18 hours. This should be longer than maximumAgeOfAnObjectThatIAmWillingToAccept so that we don't process messages twice.
lengthOfTimeToHoldOnToAllPubkeys = 2419200 #Equals 4 weeks. You could make this longer if you want but making it shorter would not be advisable because there is a very small possibility that it could keep you from obtaining a needed pubkey for a period of time.
maximumAgeOfObjectsThatIAdvertiseToOthers = 216000 #Equals two days and 12 hours
maximumAgeOfNodesThatIAdvertiseToOthers = 10800 #Equals three hours
storeConfigFilesInSameDirectoryAsProgramByDefault = False #The user may de-select Portable Mode in the settings if they want the config files to stay in the application data folder.
useVeryEasyProofOfWorkForTesting = False #If you set this to True while on the normal network, you won't be able to send or sometimes receive messages.
encryptedBroadcastSwitchoverTime = 1369735200
import sys
import ConfigParser
import Queue
from addresses import *
#from shared import *
import shared
from defaultKnownNodes import *
import time
import socket
import threading
import hashlib
from struct import *
import pickle
import random
import sqlite3
import threading
from time import strftime, localtime, gmtime
import shutil #used for moving the messages.dat file
import string
import socks
import highlevelcrypto
from pyelliptic.openssl import OpenSSL
import ctypes
from pyelliptic import arithmetic
import signal #Used to capture a Ctrl-C keypress so that Bitmessage can shutdown gracefully.
#The next 3 are used for the API
from SimpleXMLRPCServer import *
import json
from subprocess import call #used when the API must execute an outside program
#For each stream to which we connect, several outgoingSynSender threads will exist and will collectively create 8 connections with peers.
class outgoingSynSender(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def setup(self,streamNumber):
self.streamNumber = streamNumber
def run(self):
time.sleep(1)
global alreadyAttemptedConnectionsListResetTime
while True:
#time.sleep(999999)#I sometimes use this to prevent connections for testing.
if len(selfInitiatedConnections[self.streamNumber]) < 8: #maximum number of outgoing connections = 8
random.seed()
HOST, = random.sample(shared.knownNodes[self.streamNumber], 1)
alreadyAttemptedConnectionsListLock.acquire()
while HOST in alreadyAttemptedConnectionsList or HOST in shared.connectedHostsList:
alreadyAttemptedConnectionsListLock.release()
#print 'choosing new sample'
random.seed()
HOST, = random.sample(shared.knownNodes[self.streamNumber], 1)
time.sleep(1)
#Clear out the alreadyAttemptedConnectionsList every half hour so that this program will again attempt a connection to any nodes, even ones it has already tried.
if (time.time() - alreadyAttemptedConnectionsListResetTime) > 1800:
alreadyAttemptedConnectionsList.clear()
alreadyAttemptedConnectionsListResetTime = int(time.time())
alreadyAttemptedConnectionsListLock.acquire()
alreadyAttemptedConnectionsList[HOST] = 0
alreadyAttemptedConnectionsListLock.release()
PORT, timeNodeLastSeen = shared.knownNodes[self.streamNumber][HOST]
sock = socks.socksocket(socket.AF_INET, socket.SOCK_STREAM)
#This option apparently avoids the TIME_WAIT state so that we can rebind faster
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.settimeout(20)
if shared.config.get('bitmessagesettings', 'socksproxytype') == 'none' and verbose >= 2:
shared.printLock.acquire()
print 'Trying an outgoing connection to', HOST, ':', PORT
shared.printLock.release()
#sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
elif shared.config.get('bitmessagesettings', 'socksproxytype') == 'SOCKS4a':
if verbose >= 2:
shared.printLock.acquire()
print '(Using SOCKS4a) Trying an outgoing connection to', HOST, ':', PORT
shared.printLock.release()
proxytype = socks.PROXY_TYPE_SOCKS4
sockshostname = shared.config.get('bitmessagesettings', 'sockshostname')
socksport = shared.config.getint('bitmessagesettings', 'socksport')
rdns = True #Do domain name lookups through the proxy; though this setting doesn't really matter since we won't be doing any domain name lookups anyway.
if shared.config.getboolean('bitmessagesettings', 'socksauthentication'):
socksusername = shared.config.get('bitmessagesettings', 'socksusername')
sockspassword = shared.config.get('bitmessagesettings', 'sockspassword')
sock.setproxy(proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
else:
sock.setproxy(proxytype, sockshostname, socksport, rdns)
elif shared.config.get('bitmessagesettings', 'socksproxytype') == 'SOCKS5':
if verbose >= 2:
shared.printLock.acquire()
print '(Using SOCKS5) Trying an outgoing connection to', HOST, ':', PORT
shared.printLock.release()
proxytype = socks.PROXY_TYPE_SOCKS5
sockshostname = shared.config.get('bitmessagesettings', 'sockshostname')
socksport = shared.config.getint('bitmessagesettings', 'socksport')
rdns = True #Do domain name lookups through the proxy; though this setting doesn't really matter since we won't be doing any domain name lookups anyway.
if shared.config.getboolean('bitmessagesettings', 'socksauthentication'):
socksusername = shared.config.get('bitmessagesettings', 'socksusername')
sockspassword = shared.config.get('bitmessagesettings', 'sockspassword')
sock.setproxy(proxytype, sockshostname, socksport, rdns, socksusername, sockspassword)
else:
sock.setproxy(proxytype, sockshostname, socksport, rdns)
try:
sock.connect((HOST, PORT))
rd = receiveDataThread()
rd.daemon = True # close the main program even if there are threads left
#self.emit(SIGNAL("passObjectThrough(PyQt_PyObject)"),rd)
objectsOfWhichThisRemoteNodeIsAlreadyAware = {}
rd.setup(sock,HOST,PORT,self.streamNumber,objectsOfWhichThisRemoteNodeIsAlreadyAware)
rd.start()
shared.printLock.acquire()
print self, 'connected to', HOST, 'during an outgoing attempt.'
shared.printLock.release()
sd = sendDataThread()
sd.setup(sock,HOST,PORT,self.streamNumber,objectsOfWhichThisRemoteNodeIsAlreadyAware)
sd.start()
sd.sendVersionMessage()
except socks.GeneralProxyError, err:
if verbose >= 2:
shared.printLock.acquire()
print 'Could NOT connect to', HOST, 'during outgoing attempt.', err
shared.printLock.release()
PORT, timeLastSeen = shared.knownNodes[self.streamNumber][HOST]
if (int(time.time())-timeLastSeen) > 172800 and len(shared.knownNodes[self.streamNumber]) > 1000: # for nodes older than 48 hours old if we have more than 1000 hosts in our list, delete from the shared.knownNodes data-structure.
shared.knownNodesLock.acquire()
del shared.knownNodes[self.streamNumber][HOST]
shared.knownNodesLock.release()
print 'deleting ', HOST, 'from shared.knownNodes because it is more than 48 hours old and we could not connect to it.'
except socks.Socks5AuthError, err:
#self.emit(SIGNAL("updateStatusBar(PyQt_PyObject)"),"SOCKS5 Authentication problem: "+str(err))
shared.UISignalQueue.put(('updateStatusBar',"SOCKS5 Authentication problem: "+str(err)))
except socks.Socks5Error, err:
pass
print 'SOCKS5 error. (It is possible that the server wants authentication).)' ,str(err)
#self.emit(SIGNAL("updateStatusBar(PyQt_PyObject)"),"SOCKS5 error. Server might require authentication. "+str(err))
except socks.Socks4Error, err:
print 'Socks4Error:', err
#self.emit(SIGNAL("updateStatusBar(PyQt_PyObject)"),"SOCKS4 error: "+str(err))
except socket.error, err:
if shared.config.get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS':
print 'Bitmessage MIGHT be having trouble connecting to the SOCKS server. '+str(err)
#self.emit(SIGNAL("updateStatusBar(PyQt_PyObject)"),"Problem: Bitmessage can not connect to the SOCKS server. "+str(err))
else:
if verbose >= 1:
shared.printLock.acquire()
print 'Could NOT connect to', HOST, 'during outgoing attempt.', err
shared.printLock.release()
PORT, timeLastSeen = shared.knownNodes[self.streamNumber][HOST]
if (int(time.time())-timeLastSeen) > 172800 and len(shared.knownNodes[self.streamNumber]) > 1000: # for nodes older than 48 hours old if we have more than 1000 hosts in our list, delete from the knownNodes data-structure.
shared.knownNodesLock.acquire()
del shared.knownNodes[self.streamNumber][HOST]
shared.knownNodesLock.release()
print 'deleting ', HOST, 'from knownNodes because it is more than 48 hours old and we could not connect to it.'
except Exception, err:
sys.stderr.write('An exception has occurred in the outgoingSynSender thread that was not caught by other exception types: %s\n' % err)
time.sleep(0.1)
#Only one singleListener thread will ever exist. It creates the receiveDataThread and sendDataThread for each incoming connection. Note that it cannot set the stream number because it is not known yet- the other node will have to tell us its stream number in a version message. If we don't care about their stream, we will close the connection (within the recversion function of the recieveData thread)
class singleListener(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
def run(self):
#We don't want to accept incoming connections if the user is using a SOCKS proxy. If they eventually select proxy 'none' then this will start listening for connections.
while shared.config.get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS':
time.sleep(300)
shared.printLock.acquire()
print 'Listening for incoming connections.'
shared.printLock.release()
HOST = '' # Symbolic name meaning all available interfaces
PORT = shared.config.getint('bitmessagesettings', 'port')
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#This option apparently avoids the TIME_WAIT state so that we can rebind faster
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind((HOST, PORT))
sock.listen(2)
while True:
#We don't want to accept incoming connections if the user is using a SOCKS proxy. If the user eventually select proxy 'none' then this will start listening for connections.
while shared.config.get('bitmessagesettings', 'socksproxytype')[0:5] == 'SOCKS':
time.sleep(10)
a,(HOST,PORT) = sock.accept()
#Users are finding that if they run more than one node in the same network (thus with the same public IP), they can not connect with the second node. This is because this section of code won't accept the connection from the same IP. This problem will go away when the Bitmessage network grows beyond being tiny but in the mean time I'll comment out this code section.
"""while HOST in shared.connectedHostsList:
print 'incoming connection is from a host in shared.connectedHostsList (we are already connected to it). Ignoring it.'
a.close()
a,(HOST,PORT) = sock.accept()"""
objectsOfWhichThisRemoteNodeIsAlreadyAware = {}
sd = sendDataThread()
sd.setup(a,HOST,PORT,-1,objectsOfWhichThisRemoteNodeIsAlreadyAware)
sd.start()
rd = receiveDataThread()
rd.daemon = True # close the main program even if there are threads left
rd.setup(a,HOST,PORT,-1,objectsOfWhichThisRemoteNodeIsAlreadyAware)
rd.start()
shared.printLock.acquire()
print self, 'connected to', HOST,'during INCOMING request.'
shared.printLock.release()
#This thread is created either by the synSenderThread(for outgoing connections) or the singleListenerThread(for incoming connectiosn).
class receiveDataThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.data = ''
self.verackSent = False
self.verackReceived = False
def setup(self,sock,HOST,port,streamNumber,objectsOfWhichThisRemoteNodeIsAlreadyAware):
self.sock = sock
self.HOST = HOST
self.PORT = port
self.sock.settimeout(600) #We'll send out a pong every 5 minutes to make sure the connection stays alive if there has been no other traffic to send lately.
self.streamNumber = streamNumber
self.payloadLength = 0 #This is the protocol payload length thus it doesn't include the 24 byte message header
self.receivedgetbiginv = False #Gets set to true once we receive a getbiginv message from our peer. An abusive peer might request it too much so we use this variable to check whether they have already asked for a big inv message.
self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave = {}
shared.connectedHostsList[self.HOST] = 0 #The very fact that this receiveData thread exists shows that we are connected to the remote host. Let's add it to this list so that an outgoingSynSender thread doesn't try to connect to it.
self.connectionIsOrWasFullyEstablished = False #set to true after the remote node and I accept each other's version messages. This is needed to allow the user interface to accurately reflect the current number of connections.
if self.streamNumber == -1: #This was an incoming connection. Send out a version message if we accept the other node's version message.
self.initiatedConnection = False
else:
self.initiatedConnection = True
selfInitiatedConnections[streamNumber][self] = 0
self.ackDataThatWeHaveYetToSend = [] #When we receive a message bound for us, we store the acknowledgement that we need to send (the ackdata) here until we are done processing all other data received from this peer.
self.objectsOfWhichThisRemoteNodeIsAlreadyAware = objectsOfWhichThisRemoteNodeIsAlreadyAware
def run(self):
shared.printLock.acquire()
print 'ID of the receiveDataThread is', str(id(self))+'. The size of the shared.connectedHostsList is now', len(shared.connectedHostsList)
shared.printLock.release()
while True:
try:
self.data += self.sock.recv(4096)
except socket.timeout:
shared.printLock.acquire()
print 'Timeout occurred waiting for data from', self.HOST + '. Closing receiveData thread. (ID:',str(id(self))+ ')'
shared.printLock.release()
break
except Exception, err:
shared.printLock.acquire()
print 'sock.recv error. Closing receiveData thread (HOST:', self.HOST, 'ID:',str(id(self))+ ').', err
shared.printLock.release()
break
#print 'Received', repr(self.data)
if self.data == "":
shared.printLock.acquire()
print 'Connection to', self.HOST, 'closed. Closing receiveData thread. (ID:',str(id(self))+ ')'
shared.printLock.release()
break
else:
self.processData()
"""try:
#self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
except Exception, err:
print 'Within receiveDataThread run(), self.sock.shutdown or .close() failed.', err"""
try:
del selfInitiatedConnections[self.streamNumber][self]
shared.printLock.acquire()
print 'removed self (a receiveDataThread) from selfInitiatedConnections'
shared.printLock.release()
except:
pass
shared.broadcastToSendDataQueues((0, 'shutdown', self.HOST))
try:
del shared.connectedHostsList[self.HOST]
except Exception, err:
print 'Could not delete', self.HOST, 'from shared.connectedHostsList.', err
shared.UISignalQueue.put(('updateNetworkStatusTab','no data'))
shared.printLock.acquire()
print 'The size of the connectedHostsList is now:', len(shared.connectedHostsList)
shared.printLock.release()
def processData(self):
global verbose
#if verbose >= 3:
#shared.printLock.acquire()
#print 'self.data is currently ', repr(self.data)
#shared.printLock.release()
if len(self.data) < 20: #if so little of the data has arrived that we can't even unpack the payload length
pass
elif self.data[0:4] != '\xe9\xbe\xb4\xd9':
if verbose >= 1:
shared.printLock.acquire()
sys.stderr.write('The magic bytes were not correct. First 40 bytes of data: %s\n' % repr(self.data[0:40]))
print 'self.data:', self.data.encode('hex')
shared.printLock.release()
self.data = ""
else:
self.payloadLength, = unpack('>L',self.data[16:20])
if len(self.data) >= self.payloadLength+24: #check if the whole message has arrived yet. If it has,...
if self.data[20:24] == hashlib.sha512(self.data[24:self.payloadLength+24]).digest()[0:4]:#test the checksum in the message. If it is correct...
#print 'message checksum is correct'
#The time we've last seen this node is obviously right now since we just received valid data from it. So update the knownNodes list so that other peers can be made aware of its existance.
if self.initiatedConnection: #The remote port is only something we should share with others if it is the remote node's incoming port (rather than some random operating-system-assigned outgoing port).
shared.knownNodesLock.acquire()
shared.knownNodes[self.streamNumber][self.HOST] = (self.PORT,int(time.time()))
shared.knownNodesLock.release()
if self.payloadLength <= 180000000: #If the size of the message is greater than 180MB, ignore it. (I get memory errors when processing messages much larger than this though it is concievable that this value will have to be lowered if some systems are less tolarant of large messages.)
remoteCommand = self.data[4:16]
shared.printLock.acquire()
print 'remoteCommand', repr(remoteCommand.replace('\x00','')), ' from', self.HOST
shared.printLock.release()
if remoteCommand == 'version\x00\x00\x00\x00\x00':
self.recversion(self.data[24:self.payloadLength+24])
elif remoteCommand == 'verack\x00\x00\x00\x00\x00\x00':
self.recverack()
elif remoteCommand == 'addr\x00\x00\x00\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.recaddr(self.data[24:self.payloadLength+24])
elif remoteCommand == 'getpubkey\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.recgetpubkey(self.data[24:self.payloadLength+24])
elif remoteCommand == 'pubkey\x00\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.recpubkey(self.data[24:self.payloadLength+24])
elif remoteCommand == 'inv\x00\x00\x00\x00\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.recinv(self.data[24:self.payloadLength+24])
elif remoteCommand == 'getdata\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.recgetdata(self.data[24:self.payloadLength+24])
elif remoteCommand == 'getbiginv\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.sendBigInv()
elif remoteCommand == 'msg\x00\x00\x00\x00\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.recmsg(self.data[24:self.payloadLength+24])
elif remoteCommand == 'broadcast\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.recbroadcast(self.data[24:self.payloadLength+24])
elif remoteCommand == 'getaddr\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.sendaddr()
elif remoteCommand == 'ping\x00\x00\x00\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
self.sendpong()
elif remoteCommand == 'pong\x00\x00\x00\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
pass
elif remoteCommand == 'alert\x00\x00\x00\x00\x00\x00\x00' and self.connectionIsOrWasFullyEstablished:
pass
self.data = self.data[self.payloadLength+24:]#take this message out and then process the next message
if self.data == '':
while len(self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave) > 0:
random.seed()
objectHash, = random.sample(self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave, 1)
if objectHash in shared.inventory:
shared.printLock.acquire()
print 'Inventory (in memory) already has object listed in inv message.'
shared.printLock.release()
del self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave[objectHash]
elif isInSqlInventory(objectHash):
if verbose >= 3:
shared.printLock.acquire()
print 'Inventory (SQL on disk) already has object listed in inv message.'
shared.printLock.release()
del self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave[objectHash]
else:
self.sendgetdata(objectHash)
del self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave[objectHash] #It is possible that the remote node doesn't respond with the object. In that case, we'll very likely get it from someone else anyway.
if len(self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave) == 0:
shared.printLock.acquire()
print '(concerning', self.HOST + ')', 'number of objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave is now', len(self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave)
shared.printLock.release()
break
if len(self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave) == 0:
shared.printLock.acquire()
print '(concerning', self.HOST + ')', 'number of objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave is now', len(self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave)
shared.printLock.release()
if len(self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave) > 0:
shared.printLock.acquire()
print '(concerning', self.HOST + ')', 'number of objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave is now', len(self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave)
shared.printLock.release()
if len(self.ackDataThatWeHaveYetToSend) > 0:
self.data = self.ackDataThatWeHaveYetToSend.pop()
self.processData()
else:
print 'Checksum incorrect. Clearing this message.'
self.data = self.data[self.payloadLength+24:]
def isProofOfWorkSufficient(self,data,nonceTrialsPerByte=0,payloadLengthExtraBytes=0):
if nonceTrialsPerByte < shared.networkDefaultProofOfWorkNonceTrialsPerByte:
nonceTrialsPerByte = shared.networkDefaultProofOfWorkNonceTrialsPerByte
if payloadLengthExtraBytes < shared.networkDefaultPayloadLengthExtraBytes:
payloadLengthExtraBytes = shared.networkDefaultPayloadLengthExtraBytes
POW, = unpack('>Q',hashlib.sha512(hashlib.sha512(data[:8]+ hashlib.sha512(data[8:]).digest()).digest()).digest()[0:8])
#print 'POW:', POW
return POW <= 2**64 / ((len(data)+payloadLengthExtraBytes) * (nonceTrialsPerByte))
def sendpong(self):
print 'Sending pong'
try:
self.sock.sendall('\xE9\xBE\xB4\xD9\x70\x6F\x6E\x67\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xcf\x83\xe1\x35')
except Exception, err:
#if not 'Bad file descriptor' in err:
shared.printLock.acquire()
sys.stderr.write('sock.sendall error: %s\n' % err)
shared.printLock.release()
def recverack(self):
print 'verack received'
self.verackReceived = True
if self.verackSent == True:
#We have thus both sent and received a verack.
self.connectionFullyEstablished()
def connectionFullyEstablished(self):
self.connectionIsOrWasFullyEstablished = True
if not self.initiatedConnection:
#self.emit(SIGNAL("setStatusIcon(PyQt_PyObject)"),'green')
shared.UISignalQueue.put(('setStatusIcon','green'))
shared.UISignalQueue.put(('updateNetworkStatusTab','no data'))
remoteNodeIncomingPort, remoteNodeSeenTime = shared.knownNodes[self.streamNumber][self.HOST]
shared.printLock.acquire()
print 'Connection fully established with', self.HOST, remoteNodeIncomingPort
print 'The size of the connectedHostsList is now', len(shared.connectedHostsList)
print 'The length of sendDataQueues is now:', len(shared.sendDataQueues)
print 'broadcasting addr from within connectionFullyEstablished function.'
shared.printLock.release()
self.broadcastaddr([(int(time.time()), self.streamNumber, 1, self.HOST, remoteNodeIncomingPort)]) #This lets all of our peers know about this new node.
self.sendaddr() #This is one large addr message to this one peer.
if not self.initiatedConnection and len(shared.connectedHostsList) > 200:
shared.printLock.acquire()
print 'We are connected to too many people. Closing connection.'
shared.printLock.release()
#self.sock.shutdown(socket.SHUT_RDWR)
#self.sock.close()
shared.broadcastToSendDataQueues((0, 'shutdown', self.HOST))
return
self.sendBigInv()
def sendBigInv(self): #I used capitals in for this function name because there is no such Bitmessage command as 'biginv'.
if self.receivedgetbiginv:
print 'We have already sent a big inv message to this peer. Ignoring request.'
return
else:
self.receivedgetbiginv = True
shared.sqlLock.acquire()
#Select all hashes which are younger than two days old and in this stream.
t = (int(time.time())-maximumAgeOfObjectsThatIAdvertiseToOthers,int(time.time())-lengthOfTimeToHoldOnToAllPubkeys,self.streamNumber)
shared.sqlSubmitQueue.put('''SELECT hash FROM inventory WHERE ((receivedtime>? and objecttype<>'pubkey') or (receivedtime>? and objecttype='pubkey')) and streamnumber=?''')
shared.sqlSubmitQueue.put(t)
queryreturn = shared.sqlReturnQueue.get()
shared.sqlLock.release()
bigInvList = {}
for row in queryreturn:
hash, = row
if hash not in self.objectsOfWhichThisRemoteNodeIsAlreadyAware:
bigInvList[hash] = 0
else:
shared.printLock.acquire()
print 'Not including an object hash in a big inv message because the remote node is already aware of it.'#This line is here to check that this feature is working.
shared.printLock.release()
#We also have messages in our inventory in memory (which is a python dictionary). Let's fetch those too.
for hash, storedValue in shared.inventory.items():
if hash not in self.objectsOfWhichThisRemoteNodeIsAlreadyAware:
objectType, streamNumber, payload, receivedTime = storedValue
if streamNumber == self.streamNumber and receivedTime > int(time.time())-maximumAgeOfObjectsThatIAdvertiseToOthers:
bigInvList[hash] = 0
else:
shared.printLock.acquire()
print 'Not including an object hash in a big inv message because the remote node is already aware of it.'#This line is here to check that this feature is working.
shared.printLock.release()
numberOfObjectsInInvMessage = 0
payload = ''
#Now let us start appending all of these hashes together. They will be sent out in a big inv message to our new peer.
for hash, storedValue in bigInvList.items():
payload += hash
numberOfObjectsInInvMessage += 1
if numberOfObjectsInInvMessage >= 50000: #We can only send a max of 50000 items per inv message but we may have more objects to advertise. They must be split up into multiple inv messages.
self.sendinvMessageToJustThisOnePeer(numberOfObjectsInInvMessage,payload)
payload = ''
numberOfObjectsInInvMessage = 0
if numberOfObjectsInInvMessage > 0:
self.sendinvMessageToJustThisOnePeer(numberOfObjectsInInvMessage,payload)
#Self explanatory. Notice that there is also a broadcastinv function for broadcasting invs to everyone in our stream.
def sendinvMessageToJustThisOnePeer(self,numberOfObjects,payload):
payload = encodeVarint(numberOfObjects) + payload
headerData = '\xe9\xbe\xb4\xd9' #magic bits, slighly different from Bitcoin's magic bits.
headerData += 'inv\x00\x00\x00\x00\x00\x00\x00\x00\x00'
headerData += pack('>L',len(payload))
headerData += hashlib.sha512(payload).digest()[:4]
shared.printLock.acquire()
print 'Sending huge inv message with', numberOfObjects, 'objects to just this one peer'
shared.printLock.release()
try:
self.sock.sendall(headerData + payload)
except Exception, err:
#if not 'Bad file descriptor' in err:
shared.printLock.acquire()
sys.stderr.write('sock.sendall error: %s\n' % err)
shared.printLock.release()
#We have received a broadcast message
def recbroadcast(self,data):
self.messageProcessingStartTime = time.time()
#First we must check to make sure the proof of work is sufficient.
if not self.isProofOfWorkSufficient(data):
print 'Proof of work in broadcast message insufficient.'
return
readPosition = 8 #bypass the nonce
embeddedTime, = unpack('>I',data[readPosition:readPosition+4])
#This section is used for the transition from 32 bit time to 64 bit time in the protocol.
if embeddedTime == 0:
embeddedTime, = unpack('>Q',data[readPosition:readPosition+8])
readPosition += 8
else:
readPosition += 4
if embeddedTime > (int(time.time())+10800): #prevent funny business
print 'The embedded time in this broadcast message is more than three hours in the future. That doesn\'t make sense. Ignoring message.'
return
if embeddedTime < (int(time.time())-maximumAgeOfAnObjectThatIAmWillingToAccept):
print 'The embedded time in this broadcast message is too old. Ignoring message.'
return
if len(data) < 180:
print 'The payload length of this broadcast packet is unreasonably low. Someone is probably trying funny business. Ignoring message.'
return
#Let us check to make sure the stream number is correct (thus preventing an individual from sending broadcasts out on the wrong streams or all streams).
broadcastVersion, broadcastVersionLength = decodeVarint(data[readPosition:readPosition+10])
if broadcastVersion >= 2:
streamNumber, streamNumberLength = decodeVarint(data[readPosition+broadcastVersionLength:readPosition+broadcastVersionLength+10])
if streamNumber != self.streamNumber:
print 'The stream number encoded in this broadcast message (' + str(streamNumber) + ') does not match the stream number on which it was received. Ignoring it.'
return
shared.inventoryLock.acquire()
self.inventoryHash = calculateInventoryHash(data)
if self.inventoryHash in shared.inventory:
print 'We have already received this broadcast object. Ignoring.'
shared.inventoryLock.release()
return
elif isInSqlInventory(self.inventoryHash):
print 'We have already received this broadcast object (it is stored on disk in the SQL inventory). Ignoring it.'
shared.inventoryLock.release()
return
#It is valid so far. Let's let our peers know about it.
objectType = 'broadcast'
shared.inventory[self.inventoryHash] = (objectType, self.streamNumber, data, embeddedTime)
shared.inventoryLock.release()
self.broadcastinv(self.inventoryHash)
#self.emit(SIGNAL("incrementNumberOfBroadcastsProcessed()"))
shared.UISignalQueue.put(('incrementNumberOfBroadcastsProcessed','no data'))
self.processbroadcast(readPosition,data)#When this function returns, we will have either successfully processed this broadcast because we are interested in it, ignored it because we aren't interested in it, or found problem with the broadcast that warranted ignoring it.
# Let us now set lengthOfTimeWeShouldUseToProcessThisMessage. If we haven't used the specified amount of time, we shall sleep. These values are mostly the same values used for msg messages although broadcast messages are processed faster.
if len(data) > 100000000: #Size is greater than 100 megabytes
lengthOfTimeWeShouldUseToProcessThisMessage = 100 #seconds.
elif len(data) > 10000000: #Between 100 and 10 megabytes
lengthOfTimeWeShouldUseToProcessThisMessage = 20 #seconds.
elif len(data) > 1000000: #Between 10 and 1 megabyte
lengthOfTimeWeShouldUseToProcessThisMessage = 3 #seconds.
else: #Less than 1 megabyte
lengthOfTimeWeShouldUseToProcessThisMessage = .6 #seconds.
sleepTime = lengthOfTimeWeShouldUseToProcessThisMessage - (time.time()- self.messageProcessingStartTime)
if sleepTime > 0:
shared.printLock.acquire()
print 'Timing attack mitigation: Sleeping for', sleepTime ,'seconds.'
shared.printLock.release()
time.sleep(sleepTime)
shared.printLock.acquire()
print 'Total message processing time:', time.time()- self.messageProcessingStartTime, 'seconds.'
shared.printLock.release()
#A broadcast message has a valid time and POW and requires processing. The recbroadcast function calls this one.
def processbroadcast(self,readPosition,data):
broadcastVersion, broadcastVersionLength = decodeVarint(data[readPosition:readPosition+9])
readPosition += broadcastVersionLength
if broadcastVersion < 1 or broadcastVersion > 2:
print 'Cannot decode incoming broadcast versions higher than 2. Assuming the sender isn\' being silly, you should upgrade Bitmessage because this message shall be ignored.'
return
if broadcastVersion == 1:
beginningOfPubkeyPosition = readPosition #used when we add the pubkey to our pubkey table
sendersAddressVersion, sendersAddressVersionLength = decodeVarint(data[readPosition:readPosition+9])
if sendersAddressVersion <= 1 or sendersAddressVersion >=3:
#Cannot decode senderAddressVersion higher than 2. Assuming the sender isn\' being silly, you should upgrade Bitmessage because this message shall be ignored.
return
readPosition += sendersAddressVersionLength
if sendersAddressVersion == 2:
sendersStream, sendersStreamLength = decodeVarint(data[readPosition:readPosition+9])
readPosition += sendersStreamLength
behaviorBitfield = data[readPosition:readPosition+4]
readPosition += 4
sendersPubSigningKey = '\x04' + data[readPosition:readPosition+64]
readPosition += 64
sendersPubEncryptionKey = '\x04' + data[readPosition:readPosition+64]
readPosition += 64
endOfPubkeyPosition = readPosition
sendersHash = data[readPosition:readPosition+20]
if sendersHash not in shared.broadcastSendersForWhichImWatching:
#Display timing data
shared.printLock.acquire()
print 'Time spent deciding that we are not interested in this v1 broadcast:', time.time()- self.messageProcessingStartTime
shared.printLock.release()
return
#At this point, this message claims to be from sendersHash and we are interested in it. We still have to hash the public key to make sure it is truly the key that matches the hash, and also check the signiture.
readPosition += 20
sha = hashlib.new('sha512')
sha.update(sendersPubSigningKey+sendersPubEncryptionKey)
ripe = hashlib.new('ripemd160')
ripe.update(sha.digest())
if ripe.digest() != sendersHash:
#The sender of this message lied.
return
messageEncodingType, messageEncodingTypeLength = decodeVarint(data[readPosition:readPosition+9])
if messageEncodingType == 0:
return
readPosition += messageEncodingTypeLength
messageLength, messageLengthLength = decodeVarint(data[readPosition:readPosition+9])
readPosition += messageLengthLength
message = data[readPosition:readPosition+messageLength]
readPosition += messageLength
readPositionAtBottomOfMessage = readPosition
signatureLength, signatureLengthLength = decodeVarint(data[readPosition:readPosition+9])
readPosition += signatureLengthLength
signature = data[readPosition:readPosition+signatureLength]
try:
highlevelcrypto.verify(data[12:readPositionAtBottomOfMessage],signature,sendersPubSigningKey.encode('hex'))
print 'ECDSA verify passed'
except Exception, err:
print 'ECDSA verify failed', err
return
#verify passed
#Let's store the public key in case we want to reply to this person.
#We don't have the correct nonce or time (which would let us send out a pubkey message) so we'll just fill it with 1's. We won't be able to send this pubkey to others (without doing the proof of work ourselves, which this program is programmed to not do.)
t = (ripe.digest(),'\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF'+'\xFF\xFF\xFF\xFF'+data[beginningOfPubkeyPosition:endOfPubkeyPosition],int(time.time()),'yes')
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''INSERT INTO pubkeys VALUES (?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
shared.workerQueue.put(('newpubkey',(sendersAddressVersion,sendersStream,ripe.digest()))) #This will check to see whether we happen to be awaiting this pubkey in order to send a message. If we are, it will do the POW and send it.
fromAddress = encodeAddress(sendersAddressVersion,sendersStream,ripe.digest())
shared.printLock.acquire()
print 'fromAddress:', fromAddress
shared.printLock.release()
if messageEncodingType == 2:
bodyPositionIndex = string.find(message,'\nBody:')
if bodyPositionIndex > 1:
subject = message[8:bodyPositionIndex]
body = message[bodyPositionIndex+6:]
else:
subject = ''
body = message
elif messageEncodingType == 1:
body = message
subject = ''
elif messageEncodingType == 0:
print 'messageEncodingType == 0. Doing nothing with the message.'
else:
body = 'Unknown encoding type.\n\n' + repr(message)
subject = ''
toAddress = '[Broadcast subscribers]'
if messageEncodingType <> 0:
shared.sqlLock.acquire()
t = (self.inventoryHash,toAddress,fromAddress,subject,int(time.time()),body,'inbox',messageEncodingType,0)
shared.sqlSubmitQueue.put('''INSERT INTO inbox VALUES (?,?,?,?,?,?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
#self.emit(SIGNAL("displayNewInboxMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),self.inventoryHash,toAddress,fromAddress,subject,body)
shared.UISignalQueue.put(('displayNewInboxMessage',(self.inventoryHash,toAddress,fromAddress,subject,body)))
#If we are behaving as an API then we might need to run an outside command to let some program know that a new message has arrived.
if shared.safeConfigGetBoolean('bitmessagesettings','apienabled'):
try:
apiNotifyPath = shared.config.get('bitmessagesettings','apinotifypath')
except:
apiNotifyPath = ''
if apiNotifyPath != '':
call([apiNotifyPath, "newBroadcast"])
#Display timing data
shared.printLock.acquire()
print 'Time spent processing this interesting broadcast:', time.time()- self.messageProcessingStartTime
shared.printLock.release()
if broadcastVersion == 2:
cleartextStreamNumber, cleartextStreamNumberLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += cleartextStreamNumberLength
initialDecryptionSuccessful = False
for key, cryptorObject in shared.MyECSubscriptionCryptorObjects.items():
try:
decryptedData = cryptorObject.decrypt(data[readPosition:])
toRipe = key #This is the RIPE hash of the sender's pubkey. We need this below to compare to the RIPE hash of the sender's address to verify that it was encrypted by with their key rather than some other key.
initialDecryptionSuccessful = True
print 'EC decryption successful using key associated with ripe hash:', key.encode('hex')
break
except Exception, err:
pass
#print 'cryptorObject.decrypt Exception:', err
if not initialDecryptionSuccessful:
#This is not a broadcast I am interested in.
shared.printLock.acquire()
print 'Length of time program spent failing to decrypt this v2 broadcast:', time.time()- self.messageProcessingStartTime, 'seconds.'
shared.printLock.release()
return
#At this point this is a broadcast I have decrypted and thus am interested in.
signedBroadcastVersion, readPosition = decodeVarint(decryptedData[:10])
beginningOfPubkeyPosition = readPosition #used when we add the pubkey to our pubkey table
sendersAddressVersion, sendersAddressVersionLength = decodeVarint(decryptedData[readPosition:readPosition+9])
if sendersAddressVersion < 2 or sendersAddressVersion > 3:
print 'Cannot decode senderAddressVersion other than 2 or 3. Assuming the sender isn\' being silly, you should upgrade Bitmessage because this message shall be ignored.'
return
readPosition += sendersAddressVersionLength
sendersStream, sendersStreamLength = decodeVarint(decryptedData[readPosition:readPosition+9])
if sendersStream != cleartextStreamNumber:
print 'The stream number outside of the encryption on which the POW was completed doesn\'t match the stream number inside the encryption. Ignoring broadcast.'
return
readPosition += sendersStreamLength
behaviorBitfield = decryptedData[readPosition:readPosition+4]
readPosition += 4
sendersPubSigningKey = '\x04' + decryptedData[readPosition:readPosition+64]
readPosition += 64
sendersPubEncryptionKey = '\x04' + decryptedData[readPosition:readPosition+64]
readPosition += 64
if sendersAddressVersion >= 3:
requiredAverageProofOfWorkNonceTrialsPerByte, varintLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += varintLength
print 'sender\'s requiredAverageProofOfWorkNonceTrialsPerByte is', requiredAverageProofOfWorkNonceTrialsPerByte
requiredPayloadLengthExtraBytes, varintLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += varintLength
print 'sender\'s requiredPayloadLengthExtraBytes is', requiredPayloadLengthExtraBytes
endOfPubkeyPosition = readPosition
sha = hashlib.new('sha512')
sha.update(sendersPubSigningKey+sendersPubEncryptionKey)
ripe = hashlib.new('ripemd160')
ripe.update(sha.digest())
if toRipe != ripe.digest():
print 'The encryption key used to encrypt this message doesn\'t match the keys inbedded in the message itself. Ignoring message.'
return
messageEncodingType, messageEncodingTypeLength = decodeVarint(decryptedData[readPosition:readPosition+9])
if messageEncodingType == 0:
return
readPosition += messageEncodingTypeLength
messageLength, messageLengthLength = decodeVarint(decryptedData[readPosition:readPosition+9])
readPosition += messageLengthLength
message = decryptedData[readPosition:readPosition+messageLength]
readPosition += messageLength
readPositionAtBottomOfMessage = readPosition
signatureLength, signatureLengthLength = decodeVarint(decryptedData[readPosition:readPosition+9])
readPosition += signatureLengthLength
signature = decryptedData[readPosition:readPosition+signatureLength]
try:
highlevelcrypto.verify(decryptedData[:readPositionAtBottomOfMessage],signature,sendersPubSigningKey.encode('hex'))
print 'ECDSA verify passed'
except Exception, err:
print 'ECDSA verify failed', err
return
#verify passed
#Let's store the public key in case we want to reply to this person.
t = (ripe.digest(),'\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF'+'\xFF\xFF\xFF\xFF'+decryptedData[beginningOfPubkeyPosition:endOfPubkeyPosition],int(time.time()),'yes')
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''INSERT INTO pubkeys VALUES (?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
shared.workerQueue.put(('newpubkey',(sendersAddressVersion,sendersStream,ripe.digest()))) #This will check to see whether we happen to be awaiting this pubkey in order to send a message. If we are, it will do the POW and send it.
fromAddress = encodeAddress(sendersAddressVersion,sendersStream,ripe.digest())
shared.printLock.acquire()
print 'fromAddress:', fromAddress
shared.printLock.release()
if messageEncodingType == 2:
bodyPositionIndex = string.find(message,'\nBody:')
if bodyPositionIndex > 1:
subject = message[8:bodyPositionIndex]
body = message[bodyPositionIndex+6:]
else:
subject = ''
body = message
elif messageEncodingType == 1:
body = message
subject = ''
elif messageEncodingType == 0:
print 'messageEncodingType == 0. Doing nothing with the message.'
else:
body = 'Unknown encoding type.\n\n' + repr(message)
subject = ''
toAddress = '[Broadcast subscribers]'
if messageEncodingType <> 0:
shared.sqlLock.acquire()
t = (self.inventoryHash,toAddress,fromAddress,subject,int(time.time()),body,'inbox',messageEncodingType,0)
shared.sqlSubmitQueue.put('''INSERT INTO inbox VALUES (?,?,?,?,?,?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
#self.emit(SIGNAL("displayNewInboxMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),self.inventoryHash,toAddress,fromAddress,subject,body)
shared.UISignalQueue.put(('displayNewInboxMessage',(self.inventoryHash,toAddress,fromAddress,subject,body)))
#If we are behaving as an API then we might need to run an outside command to let some program know that a new message has arrived.
if shared.safeConfigGetBoolean('bitmessagesettings','apienabled'):
try:
apiNotifyPath = shared.config.get('bitmessagesettings','apinotifypath')
except:
apiNotifyPath = ''
if apiNotifyPath != '':
call([apiNotifyPath, "newBroadcast"])
#Display timing data
shared.printLock.acquire()
print 'Time spent processing this interesting broadcast:', time.time()- self.messageProcessingStartTime
shared.printLock.release()
#We have received a msg message.
def recmsg(self,data):
self.messageProcessingStartTime = time.time()
#First we must check to make sure the proof of work is sufficient.
if not self.isProofOfWorkSufficient(data):
print 'Proof of work in msg message insufficient.'
return
readPosition = 8
embeddedTime, = unpack('>I',data[readPosition:readPosition+4])
#This section is used for the transition from 32 bit time to 64 bit time in the protocol.
if embeddedTime == 0:
embeddedTime, = unpack('>Q',data[readPosition:readPosition+8])
readPosition += 8
else:
readPosition += 4
if embeddedTime > int(time.time())+10800:
print 'The time in the msg message is too new. Ignoring it. Time:', embeddedTime
return
if embeddedTime < int(time.time())-maximumAgeOfAnObjectThatIAmWillingToAccept:
print 'The time in the msg message is too old. Ignoring it. Time:', embeddedTime
return
streamNumberAsClaimedByMsg, streamNumberAsClaimedByMsgLength = decodeVarint(data[readPosition:readPosition+9])
if streamNumberAsClaimedByMsg != self.streamNumber:
print 'The stream number encoded in this msg (' + str(streamNumberAsClaimedByMsg) + ') message does not match the stream number on which it was received. Ignoring it.'
return
readPosition += streamNumberAsClaimedByMsgLength
self.inventoryHash = calculateInventoryHash(data)
shared.inventoryLock.acquire()
if self.inventoryHash in shared.inventory:
print 'We have already received this msg message. Ignoring.'
shared.inventoryLock.release()
return
elif isInSqlInventory(self.inventoryHash):
print 'We have already received this msg message (it is stored on disk in the SQL inventory). Ignoring it.'
shared.inventoryLock.release()
return
#This msg message is valid. Let's let our peers know about it.
objectType = 'msg'
shared.inventory[self.inventoryHash] = (objectType, self.streamNumber, data, embeddedTime)
shared.inventoryLock.release()
self.broadcastinv(self.inventoryHash)
#self.emit(SIGNAL("incrementNumberOfMessagesProcessed()"))
shared.UISignalQueue.put(('incrementNumberOfMessagesProcessed','no data'))
self.processmsg(readPosition,data) #When this function returns, we will have either successfully processed the message bound for us, ignored it because it isn't bound for us, or found problem with the message that warranted ignoring it.
# Let us now set lengthOfTimeWeShouldUseToProcessThisMessage. If we haven't used the specified amount of time, we shall sleep. These values are based on test timings and you may change them at-will.
if len(data) > 100000000: #Size is greater than 100 megabytes
lengthOfTimeWeShouldUseToProcessThisMessage = 100 #seconds. Actual length of time it took my computer to decrypt and verify the signature of a 100 MB message: 3.7 seconds.
elif len(data) > 10000000: #Between 100 and 10 megabytes
lengthOfTimeWeShouldUseToProcessThisMessage = 20 #seconds. Actual length of time it took my computer to decrypt and verify the signature of a 10 MB message: 0.53 seconds. Actual length of time it takes in practice when processing a real message: 1.44 seconds.
elif len(data) > 1000000: #Between 10 and 1 megabyte
lengthOfTimeWeShouldUseToProcessThisMessage = 3 #seconds. Actual length of time it took my computer to decrypt and verify the signature of a 1 MB message: 0.18 seconds. Actual length of time it takes in practice when processing a real message: 0.30 seconds.
else: #Less than 1 megabyte
lengthOfTimeWeShouldUseToProcessThisMessage = .6 #seconds. Actual length of time it took my computer to decrypt and verify the signature of a 100 KB message: 0.15 seconds. Actual length of time it takes in practice when processing a real message: 0.25 seconds.
sleepTime = lengthOfTimeWeShouldUseToProcessThisMessage - (time.time()- self.messageProcessingStartTime)
if sleepTime > 0:
shared.printLock.acquire()
print 'Timing attack mitigation: Sleeping for', sleepTime ,'seconds.'
shared.printLock.release()
time.sleep(sleepTime)
shared.printLock.acquire()
print 'Total message processing time:', time.time()- self.messageProcessingStartTime, 'seconds.'
shared.printLock.release()
#A msg message has a valid time and POW and requires processing. The recmsg function calls this one.
def processmsg(self,readPosition, encryptedData):
initialDecryptionSuccessful = False
#Let's check whether this is a message acknowledgement bound for us.
if encryptedData[readPosition:] in ackdataForWhichImWatching:
shared.printLock.acquire()
print 'This msg IS an acknowledgement bound for me.'
shared.printLock.release()
del ackdataForWhichImWatching[encryptedData[readPosition:]]
t = ('ackreceived',encryptedData[readPosition:])
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('UPDATE sent SET status=? WHERE ackdata=?')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
#self.emit(SIGNAL("updateSentItemStatusByAckdata(PyQt_PyObject,PyQt_PyObject)"),encryptedData[readPosition:],'Acknowledgement of the message received just now.')
shared.UISignalQueue.put(('updateSentItemStatusByAckdata',(encryptedData[readPosition:],'Acknowledgement of the message received just now.')))
return
else:
shared.printLock.acquire()
print 'This was NOT an acknowledgement bound for me.'
#print 'ackdataForWhichImWatching', ackdataForWhichImWatching
shared.printLock.release()
#This is not an acknowledgement bound for me. See if it is a message bound for me by trying to decrypt it with my private keys.
for key, cryptorObject in shared.myECCryptorObjects.items():
try:
decryptedData = cryptorObject.decrypt(encryptedData[readPosition:])
toRipe = key #This is the RIPE hash of my pubkeys. We need this below to compare to the destination_ripe included in the encrypted data.
initialDecryptionSuccessful = True
print 'EC decryption successful using key associated with ripe hash:', key.encode('hex')
break
except Exception, err:
pass
#print 'cryptorObject.decrypt Exception:', err
if not initialDecryptionSuccessful:
#This is not a message bound for me.
shared.printLock.acquire()
print 'Length of time program spent failing to decrypt this message:', time.time()- self.messageProcessingStartTime, 'seconds.'
shared.printLock.release()
else:
#This is a message bound for me.
toAddress = shared.myAddressesByHash[toRipe] #Look up my address based on the RIPE hash.
readPosition = 0
messageVersion, messageVersionLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += messageVersionLength
if messageVersion != 1:
print 'Cannot understand message versions other than one. Ignoring message.'
return
sendersAddressVersionNumber, sendersAddressVersionNumberLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += sendersAddressVersionNumberLength
if sendersAddressVersionNumber == 0:
print 'Cannot understand sendersAddressVersionNumber = 0. Ignoring message.'
return
if sendersAddressVersionNumber >= 4:
print 'Sender\'s address version number', sendersAddressVersionNumber, 'not yet supported. Ignoring message.'
return
if len(decryptedData) < 170:
print 'Length of the unencrypted data is unreasonably short. Sanity check failed. Ignoring message.'
return
sendersStreamNumber, sendersStreamNumberLength = decodeVarint(decryptedData[readPosition:readPosition+10])
if sendersStreamNumber == 0:
print 'sender\'s stream number is 0. Ignoring message.'
return
readPosition += sendersStreamNumberLength
behaviorBitfield = decryptedData[readPosition:readPosition+4]
readPosition += 4
pubSigningKey = '\x04' + decryptedData[readPosition:readPosition+64]
readPosition += 64
pubEncryptionKey = '\x04' + decryptedData[readPosition:readPosition+64]
readPosition += 64
if sendersAddressVersionNumber >= 3:
requiredAverageProofOfWorkNonceTrialsPerByte, varintLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += varintLength
print 'sender\'s requiredAverageProofOfWorkNonceTrialsPerByte is', requiredAverageProofOfWorkNonceTrialsPerByte
requiredPayloadLengthExtraBytes, varintLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += varintLength
print 'sender\'s requiredPayloadLengthExtraBytes is', requiredPayloadLengthExtraBytes
endOfThePublicKeyPosition = readPosition #needed for when we store the pubkey in our database of pubkeys for later use.
if toRipe != decryptedData[readPosition:readPosition+20]:
shared.printLock.acquire()
print 'The original sender of this message did not send it to you. Someone is attempting a Surreptitious Forwarding Attack.'
print 'See: http://world.std.com/~dtd/sign_encrypt/sign_encrypt7.html'
print 'your toRipe:', toRipe.encode('hex')
print 'embedded destination toRipe:', decryptedData[readPosition:readPosition+20].encode('hex')
shared.printLock.release()
return
readPosition += 20
messageEncodingType, messageEncodingTypeLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += messageEncodingTypeLength
messageLength, messageLengthLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += messageLengthLength
message = decryptedData[readPosition:readPosition+messageLength]
#print 'First 150 characters of message:', repr(message[:150])
readPosition += messageLength
ackLength, ackLengthLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += ackLengthLength
ackData = decryptedData[readPosition:readPosition+ackLength]
readPosition += ackLength
positionOfBottomOfAckData = readPosition #needed to mark the end of what is covered by the signature
signatureLength, signatureLengthLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += signatureLengthLength
signature = decryptedData[readPosition:readPosition+signatureLength]
try:
highlevelcrypto.verify(decryptedData[:positionOfBottomOfAckData],signature,pubSigningKey.encode('hex'))
print 'ECDSA verify passed'
except Exception, err:
print 'ECDSA verify failed', err
return
shared.printLock.acquire()
print 'As a matter of intellectual curiosity, here is the Bitcoin address associated with the keys owned by the other person:', calculateBitcoinAddressFromPubkey(pubSigningKey), ' ..and here is the testnet address:',calculateTestnetAddressFromPubkey(pubSigningKey),'. The other person must take their private signing key from Bitmessage and import it into Bitcoin (or a service like Blockchain.info) for it to be of any use. Do not use this unless you know what you are doing.'
shared.printLock.release()
#calculate the fromRipe.
sha = hashlib.new('sha512')
sha.update(pubSigningKey+pubEncryptionKey)
ripe = hashlib.new('ripemd160')
ripe.update(sha.digest())
#Let's store the public key in case we want to reply to this person.
t = (ripe.digest(),'\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF'+'\xFF\xFF\xFF\xFF'+decryptedData[messageVersionLength:endOfThePublicKeyPosition],int(time.time()),'yes')
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''INSERT INTO pubkeys VALUES (?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
shared.workerQueue.put(('newpubkey',(sendersAddressVersionNumber,sendersStreamNumber,ripe.digest()))) #This will check to see whether we happen to be awaiting this pubkey in order to send a message. If we are, it will do the POW and send it.
fromAddress = encodeAddress(sendersAddressVersionNumber,sendersStreamNumber,ripe.digest())
#If this message is bound for one of my version 3 addresses (or higher), then we must check to make sure it meets our demanded proof of work requirement.
if decodeAddress(toAddress)[1] >= 3:#If the toAddress version number is 3 or higher:
if not shared.isAddressInMyAddressBookSubscriptionsListOrWhitelist(fromAddress): #If I'm not friendly with this person:
requiredNonceTrialsPerByte = shared.config.getint(toAddress,'noncetrialsperbyte')
requiredPayloadLengthExtraBytes = shared.config.getint(toAddress,'payloadlengthextrabytes')
if not self.isProofOfWorkSufficient(encryptedData,requiredNonceTrialsPerByte,requiredPayloadLengthExtraBytes):
print 'Proof of work in msg message insufficient only because it does not meet our higher requirement.'
return
blockMessage = False #Gets set to True if the user shouldn't see the message according to black or white lists.
if shared.config.get('bitmessagesettings', 'blackwhitelist') == 'black': #If we are using a blacklist
t = (fromAddress,)
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''SELECT label FROM blacklist where address=? and enabled='1' ''')
shared.sqlSubmitQueue.put(t)
queryreturn = shared.sqlReturnQueue.get()
shared.sqlLock.release()
if queryreturn != []:
shared.printLock.acquire()
print 'Message ignored because address is in blacklist.'
shared.printLock.release()
blockMessage = True
else: #We're using a whitelist
t = (fromAddress,)
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''SELECT label FROM whitelist where address=? and enabled='1' ''')
shared.sqlSubmitQueue.put(t)
queryreturn = shared.sqlReturnQueue.get()
shared.sqlLock.release()
if queryreturn == []:
print 'Message ignored because address not in whitelist.'
blockMessage = True
if not blockMessage:
print 'fromAddress:', fromAddress
print 'First 150 characters of message:', repr(message[:150])
toLabel = shared.config.get(toAddress, 'label')
if toLabel == '':
toLabel = addressInKeysFile
if messageEncodingType == 2:
bodyPositionIndex = string.find(message,'\nBody:')
if bodyPositionIndex > 1:
subject = message[8:bodyPositionIndex]
body = message[bodyPositionIndex+6:]
else:
subject = ''
body = message
elif messageEncodingType == 1:
body = message
subject = ''
elif messageEncodingType == 0:
print 'messageEncodingType == 0. Doing nothing with the message. They probably just sent it so that we would store their public key or send their ack data for them.'
else:
body = 'Unknown encoding type.\n\n' + repr(message)
subject = ''
if messageEncodingType <> 0:
shared.sqlLock.acquire()
t = (self.inventoryHash,toAddress,fromAddress,subject,int(time.time()),body,'inbox',messageEncodingType,0)
shared.sqlSubmitQueue.put('''INSERT INTO inbox VALUES (?,?,?,?,?,?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
#self.emit(SIGNAL("displayNewInboxMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),self.inventoryHash,toAddress,fromAddress,subject,body)
shared.UISignalQueue.put(('displayNewInboxMessage',(self.inventoryHash,toAddress,fromAddress,subject,body)))
#If we are behaving as an API then we might need to run an outside command to let some program know that a new message has arrived.
if shared.safeConfigGetBoolean('bitmessagesettings','apienabled'):
try:
apiNotifyPath = shared.config.get('bitmessagesettings','apinotifypath')
except:
apiNotifyPath = ''
if apiNotifyPath != '':
call([apiNotifyPath, "newMessage"])
#Let us now check and see whether our receiving address is behaving as a mailing list
if shared.safeConfigGetBoolean(toAddress,'mailinglist'):
try:
mailingListName = shared.config.get(toAddress, 'mailinglistname')
except:
mailingListName = ''
#Let us send out this message as a broadcast
subject = self.addMailingListNameToSubject(subject,mailingListName)
#Let us now send this message out as a broadcast
message = strftime("%a, %Y-%m-%d %H:%M:%S UTC",gmtime()) + ' Message ostensibly from ' + fromAddress + ':\n\n' + body
fromAddress = toAddress #The fromAddress for the broadcast that we are about to send is the toAddress (my address) for the msg message we are currently processing.
ackdata = OpenSSL.rand(32) #We don't actually need the ackdata for acknowledgement since this is a broadcast message but we can use it to update the user interface when the POW is done generating.
toAddress = '[Broadcast subscribers]'
ripe = ''
shared.sqlLock.acquire()
t = ('',toAddress,ripe,fromAddress,subject,message,ackdata,int(time.time()),'broadcastpending',1,1,'sent',2)
shared.sqlSubmitQueue.put('''INSERT INTO sent VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
#self.emit(SIGNAL("displayNewSentMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),toAddress,'[Broadcast subscribers]',fromAddress,subject,message,ackdata)
shared.UISignalQueue.put(('displayNewSentMessage',(toAddress,'[Broadcast subscribers]',fromAddress,subject,message,ackdata)))
shared.workerQueue.put(('sendbroadcast',(fromAddress,subject,message)))
if self.isAckDataValid(ackData):
print 'ackData is valid. Will process it.'
self.ackDataThatWeHaveYetToSend.append(ackData) #When we have processed all data, the processData function will pop the ackData out and process it as if it is a message received from our peer.
#Display timing data
timeRequiredToAttemptToDecryptMessage = time.time()- self.messageProcessingStartTime
successfullyDecryptMessageTimings.append(timeRequiredToAttemptToDecryptMessage)
sum = 0
for item in successfullyDecryptMessageTimings:
sum += item
shared.printLock.acquire()
print 'Time to decrypt this message successfully:', timeRequiredToAttemptToDecryptMessage
print 'Average time for all message decryption successes since startup:', sum / len(successfullyDecryptMessageTimings)
shared.printLock.release()
def isAckDataValid(self,ackData):
if len(ackData) < 24:
print 'The length of ackData is unreasonably short. Not sending ackData.'
return False
if ackData[0:4] != '\xe9\xbe\xb4\xd9':
print 'Ackdata magic bytes were wrong. Not sending ackData.'
return False
ackDataPayloadLength, = unpack('>L',ackData[16:20])
if len(ackData)-24 != ackDataPayloadLength:
print 'ackData payload length doesn\'t match the payload length specified in the header. Not sending ackdata.'
return False
if ackData[4:16] != 'getpubkey\x00\x00\x00' and ackData[4:16] != 'pubkey\x00\x00\x00\x00\x00\x00' and ackData[4:16] != 'msg\x00\x00\x00\x00\x00\x00\x00\x00\x00' and ackData[4:16] != 'broadcast\x00\x00\x00' :
return False
return True
def addMailingListNameToSubject(self,subject,mailingListName):
subject = subject.strip()
if subject[:3] == 'Re:' or subject[:3] == 'RE:':
subject = subject[3:].strip()
if '['+mailingListName+']' in subject:
return subject
else:
return '['+mailingListName+'] ' + subject
#We have received a pubkey
def recpubkey(self,data):
self.pubkeyProcessingStartTime = time.time()
if len(data) < 146 or len(data) >600: #sanity check
return
#We must check to make sure the proof of work is sufficient.
if not self.isProofOfWorkSufficient(data):
print 'Proof of work in pubkey message insufficient.'
return
readPosition = 8 #for the nonce
embeddedTime, = unpack('>I',data[readPosition:readPosition+4])
#This section is used for the transition from 32 bit time to 64 bit time in the protocol.
if embeddedTime == 0:
embeddedTime, = unpack('>Q',data[readPosition:readPosition+8])
readPosition += 8
else:
readPosition += 4
if embeddedTime < int(time.time())-lengthOfTimeToHoldOnToAllPubkeys:
shared.printLock.acquire()
print 'The embedded time in this pubkey message is too old. Ignoring. Embedded time is:', embeddedTime
shared.printLock.release()
return
if embeddedTime > int(time.time()) + 10800:
shared.printLock.acquire()
print 'The embedded time in this pubkey message more than several hours in the future. This is irrational. Ignoring message.'
shared.printLock.release()
return
addressVersion, varintLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += varintLength
streamNumber, varintLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += varintLength
if self.streamNumber != streamNumber:
print 'stream number embedded in this pubkey doesn\'t match our stream number. Ignoring.'
return
inventoryHash = calculateInventoryHash(data)
shared.inventoryLock.acquire()
if inventoryHash in shared.inventory:
print 'We have already received this pubkey. Ignoring it.'
shared.inventoryLock.release()
return
elif isInSqlInventory(inventoryHash):
print 'We have already received this pubkey (it is stored on disk in the SQL inventory). Ignoring it.'
shared.inventoryLock.release()
return
objectType = 'pubkey'
shared.inventory[inventoryHash] = (objectType, self.streamNumber, data, embeddedTime)
shared.inventoryLock.release()
self.broadcastinv(inventoryHash)
#self.emit(SIGNAL("incrementNumberOfPubkeysProcessed()"))
shared.UISignalQueue.put(('incrementNumberOfPubkeysProcessed','no data'))
self.processpubkey(data)
lengthOfTimeWeShouldUseToProcessThisMessage = .2
sleepTime = lengthOfTimeWeShouldUseToProcessThisMessage - (time.time()- self.pubkeyProcessingStartTime)
if sleepTime > 0:
shared.printLock.acquire()
print 'Timing attack mitigation: Sleeping for', sleepTime ,'seconds.'
shared.printLock.release()
time.sleep(sleepTime)
shared.printLock.acquire()
print 'Total pubkey processing time:', time.time()- self.pubkeyProcessingStartTime, 'seconds.'
shared.printLock.release()
def processpubkey(self,data):
readPosition = 8 #for the nonce
embeddedTime, = unpack('>I',data[readPosition:readPosition+4])
readPosition += 4 #for the time
addressVersion, varintLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += varintLength
streamNumber, varintLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += varintLength
if addressVersion == 0:
print '(Within processpubkey) addressVersion of 0 doesn\'t make sense.'
return
if addressVersion >= 4 or addressVersion == 1:
shared.printLock.acquire()
print 'This version of Bitmessage cannot handle version', addressVersion,'addresses.'
shared.printLock.release()
return
if addressVersion == 2:
if len(data) < 146: #sanity check. This is the minimum possible length.
print '(within processpubkey) payloadLength less than 146. Sanity check failed.'
return
bitfieldBehaviors = data[readPosition:readPosition+4]
readPosition += 4
publicSigningKey = data[readPosition:readPosition+64]
#Is it possible for a public key to be invalid such that trying to encrypt or sign with it will cause an error? If it is, we should probably test these keys here.
readPosition += 64
publicEncryptionKey = data[readPosition:readPosition+64]
if len(publicEncryptionKey) < 64:
print 'publicEncryptionKey length less than 64. Sanity check failed.'
return
sha = hashlib.new('sha512')
sha.update('\x04'+publicSigningKey+'\x04'+publicEncryptionKey)
ripeHasher = hashlib.new('ripemd160')
ripeHasher.update(sha.digest())
ripe = ripeHasher.digest()
shared.printLock.acquire()
print 'within recpubkey, addressVersion:', addressVersion, ', streamNumber:', streamNumber
print 'ripe', ripe.encode('hex')
print 'publicSigningKey in hex:', publicSigningKey.encode('hex')
print 'publicEncryptionKey in hex:', publicEncryptionKey.encode('hex')
shared.printLock.release()
t = (ripe,)
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''SELECT usedpersonally FROM pubkeys WHERE hash=? AND usedpersonally='yes' ''')
shared.sqlSubmitQueue.put(t)
queryreturn = shared.sqlReturnQueue.get()
shared.sqlLock.release()
if queryreturn != []: #if this pubkey is already in our database and if we have used it personally:
print 'We HAVE used this pubkey personally. Updating time.'
t = (ripe,data,embeddedTime,'yes')
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''INSERT INTO pubkeys VALUES (?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
shared.workerQueue.put(('newpubkey',(addressVersion,streamNumber,ripe)))
else:
print 'We have NOT used this pubkey personally. Inserting in database.'
t = (ripe,data,embeddedTime,'no') #This will also update the embeddedTime.
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''INSERT INTO pubkeys VALUES (?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
shared.workerQueue.put(('newpubkey',(addressVersion,streamNumber,ripe)))
if addressVersion == 3:
if len(data) < 170: #sanity check.
print '(within processpubkey) payloadLength less than 170. Sanity check failed.'
return
bitfieldBehaviors = data[readPosition:readPosition+4]
readPosition += 4
publicSigningKey = '\x04'+data[readPosition:readPosition+64]
#Is it possible for a public key to be invalid such that trying to encrypt or sign with it will cause an error? If it is, we should probably test these keys here.
readPosition += 64
publicEncryptionKey = '\x04'+data[readPosition:readPosition+64]
readPosition += 64
specifiedNonceTrialsPerByte, specifiedNonceTrialsPerByteLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += specifiedNonceTrialsPerByteLength
specifiedPayloadLengthExtraBytes, specifiedPayloadLengthExtraBytesLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += specifiedPayloadLengthExtraBytesLength
signatureLength, signatureLengthLength = decodeVarint(data[readPosition:readPosition+10])
signature = data[readPosition:readPosition+signatureLengthLength]
try:
highlevelcrypto.verify(data[8:readPosition],signature,publicSigningKey.encode('hex'))
print 'ECDSA verify passed (within processpubkey)'
except Exception, err:
print 'ECDSA verify failed (within processpubkey)', err
return
sha = hashlib.new('sha512')
sha.update(publicSigningKey+publicEncryptionKey)
ripeHasher = hashlib.new('ripemd160')
ripeHasher.update(sha.digest())
ripe = ripeHasher.digest()
shared.printLock.acquire()
print 'within recpubkey, addressVersion:', addressVersion, ', streamNumber:', streamNumber
print 'ripe', ripe.encode('hex')
print 'publicSigningKey in hex:', publicSigningKey.encode('hex')
print 'publicEncryptionKey in hex:', publicEncryptionKey.encode('hex')
shared.printLock.release()
t = (ripe,)
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''SELECT usedpersonally FROM pubkeys WHERE hash=? AND usedpersonally='yes' ''')
shared.sqlSubmitQueue.put(t)
queryreturn = shared.sqlReturnQueue.get()
shared.sqlLock.release()
if queryreturn != []: #if this pubkey is already in our database and if we have used it personally:
print 'We HAVE used this pubkey personally. Updating time.'
t = (ripe,data,embeddedTime,'yes')
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''INSERT INTO pubkeys VALUES (?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
else:
print 'We have NOT used this pubkey personally. Inserting in database.'
t = (ripe,data,embeddedTime,'no') #This will also update the embeddedTime.
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''INSERT INTO pubkeys VALUES (?,?,?,?)''')
shared.sqlSubmitQueue.put(t)
shared.sqlReturnQueue.get()
shared.sqlSubmitQueue.put('commit')
shared.sqlLock.release()
shared.workerQueue.put(('newpubkey',(addressVersion,streamNumber,ripe)))
#We have received a getpubkey message
def recgetpubkey(self,data):
if not self.isProofOfWorkSufficient(data):
print 'Proof of work in getpubkey message insufficient.'
return
if len(data) < 34:
print 'getpubkey message doesn\'t contain enough data. Ignoring.'
return
readPosition = 8 #bypass the nonce
embeddedTime, = unpack('>I',data[readPosition:readPosition+4])
#This section is used for the transition from 32 bit time to 64 bit time in the protocol.
if embeddedTime == 0:
embeddedTime, = unpack('>Q',data[readPosition:readPosition+8])
readPosition += 8
else:
readPosition += 4
if embeddedTime > int(time.time())+10800:
print 'The time in this getpubkey message is too new. Ignoring it. Time:', embeddedTime
return
if embeddedTime < int(time.time())-maximumAgeOfAnObjectThatIAmWillingToAccept:
print 'The time in this getpubkey message is too old. Ignoring it. Time:', embeddedTime
return
requestedAddressVersionNumber, addressVersionLength = decodeVarint(data[readPosition:readPosition+10])
readPosition += addressVersionLength
streamNumber, streamNumberLength = decodeVarint(data[readPosition:readPosition+10])
if streamNumber <> self.streamNumber:
print 'The streamNumber', streamNumber, 'doesn\'t match our stream number:', self.streamNumber
return
readPosition += streamNumberLength
inventoryHash = calculateInventoryHash(data)
shared.inventoryLock.acquire()
if inventoryHash in shared.inventory:
print 'We have already received this getpubkey request. Ignoring it.'
shared.inventoryLock.release()
return
elif isInSqlInventory(inventoryHash):
print 'We have already received this getpubkey request (it is stored on disk in the SQL inventory). Ignoring it.'
shared.inventoryLock.release()
return
objectType = 'getpubkey'
shared.inventory[inventoryHash] = (objectType, self.streamNumber, data, embeddedTime)
shared.inventoryLock.release()
#This getpubkey request is valid so far. Forward to peers.
self.broadcastinv(inventoryHash)
if requestedAddressVersionNumber == 0:
print 'The requestedAddressVersionNumber of the pubkey request is zero. That doesn\'t make any sense. Ignoring it.'
return
elif requestedAddressVersionNumber == 1:
print 'The requestedAddressVersionNumber of the pubkey request is 1 which isn\'t supported anymore. Ignoring it.'
return
elif requestedAddressVersionNumber > 3:
print 'The requestedAddressVersionNumber of the pubkey request is too high. Can\'t understand. Ignoring it.'
return
requestedHash = data[readPosition:readPosition+20]
if len(requestedHash) != 20:
print 'The length of the requested hash is not 20 bytes. Something is wrong. Ignoring.'
return
print 'the hash requested in this getpubkey request is:', requestedHash.encode('hex')
"""shared.sqlLock.acquire()
t = (requestedHash,int(time.time())-lengthOfTimeToHoldOnToAllPubkeys) #this prevents SQL injection
shared.sqlSubmitQueue.put('''SELECT hash, transmitdata, time FROM pubkeys WHERE hash=? AND havecorrectnonce=1 AND time>?''')
shared.sqlSubmitQueue.put(t)
queryreturn = shared.sqlReturnQueue.get()
shared.sqlLock.release()
if queryreturn != []:
for row in queryreturn:
hash, payload, timeEncodedInPubkey = row
shared.printLock.acquire()
print 'We have the requested pubkey stored in our database of pubkeys. Sending it.'
shared.printLock.release()
inventoryHash = calculateInventoryHash(payload)
objectType = 'pubkey'
shared.inventory[inventoryHash] = (objectType, self.streamNumber, payload, timeEncodedInPubkey)#If the time embedded in this pubkey is more than 3 days old then this object isn't going to last very long in the inventory- the cleanerThread is going to come along and move it from the inventory in memory to the SQL inventory and then delete it from the SQL inventory. It should still find its way back to the original requestor if he is online however.
self.broadcastinv(inventoryHash)"""
#else: #the pubkey is not in our database of pubkeys. Let's check if the requested key is ours (which would mean we should do the POW, put it in the pubkey table, and broadcast out the pubkey.)
if requestedHash in shared.myAddressesByHash: #if this address hash is one of mine
if decodeAddress(shared.myAddressesByHash[requestedHash])[1] != requestedAddressVersionNumber:
shared.printLock.acquire()
sys.stderr.write('(Within the recgetpubkey function) Someone requested one of my pubkeys but the requestedAddressVersionNumber doesn\'t match my actual address version number. That shouldn\'t have happened. Ignoring.\n')
shared.printLock.release()
return
try:
lastPubkeySendTime = int(shared.config.get(shared.myAddressesByHash[requestedHash],'lastpubkeysendtime'))
except:
lastPubkeySendTime = 0
if lastPubkeySendTime < time.time()-lengthOfTimeToHoldOnToAllPubkeys: #If the last time we sent our pubkey was 28 days ago
shared.printLock.acquire()
print 'Found getpubkey-requested-hash in my list of EC hashes. Telling Worker thread to do the POW for a pubkey message and send it out.'
shared.printLock.release()
if requestedAddressVersionNumber == 2:
shared.workerQueue.put(('doPOWForMyV2Pubkey',requestedHash))
elif requestedAddressVersionNumber == 3:
shared.workerQueue.put(('doPOWForMyV3Pubkey',requestedHash))
else:
shared.printLock.acquire()
print 'Found getpubkey-requested-hash in my list of EC hashes BUT we already sent it recently. Ignoring request. The lastPubkeySendTime is:',lastPubkeySendTime
shared.printLock.release()
else:
shared.printLock.acquire()
print 'This getpubkey request is not for any of my keys.'
shared.printLock.release()
#We have received an inv message
def recinv(self,data):
numberOfItemsInInv, lengthOfVarint = decodeVarint(data[:10])
if len(data) < lengthOfVarint + (numberOfItemsInInv * 32):
print 'inv message doesn\'t contain enough data. Ignoring.'
return
if numberOfItemsInInv == 1: #we'll just request this data from the person who advertised the object.
self.objectsOfWhichThisRemoteNodeIsAlreadyAware[data[lengthOfVarint:32+lengthOfVarint]] = 0
if data[lengthOfVarint:32+lengthOfVarint] in shared.inventory:
shared.printLock.acquire()
print 'Inventory (in memory) has inventory item already.'
shared.printLock.release()
elif isInSqlInventory(data[lengthOfVarint:32+lengthOfVarint]):
print 'Inventory (SQL on disk) has inventory item already.'
else:
self.sendgetdata(data[lengthOfVarint:32+lengthOfVarint])
else:
print 'inv message lists', numberOfItemsInInv, 'objects.'
for i in range(numberOfItemsInInv): #upon finishing dealing with an incoming message, the receiveDataThread will request a random object from the peer. This way if we get multiple inv messages from multiple peers which list mostly the same objects, we will make getdata requests for different random objects from the various peers.
if len(data[lengthOfVarint+(32*i):32+lengthOfVarint+(32*i)]) == 32: #The length of an inventory hash should be 32. If it isn't 32 then the remote node is either badly programmed or behaving nefariously.
self.objectsOfWhichThisRemoteNodeIsAlreadyAware[data[lengthOfVarint+(32*i):32+lengthOfVarint+(32*i)]] = 0
self.objectsThatWeHaveYetToCheckAndSeeWhetherWeAlreadyHave[data[lengthOfVarint+(32*i):32+lengthOfVarint+(32*i)]] = 0
#Send a getdata message to our peer to request the object with the given hash
def sendgetdata(self,hash):
shared.printLock.acquire()
print 'sending getdata to retrieve object with hash:', hash.encode('hex')
shared.printLock.release()
payload = '\x01' + hash
headerData = '\xe9\xbe\xb4\xd9' #magic bits, slighly different from Bitcoin's magic bits.
headerData += 'getdata\x00\x00\x00\x00\x00'
headerData += pack('>L',len(payload)) #payload length. Note that we add an extra 8 for the nonce.
headerData += hashlib.sha512(payload).digest()[:4]
try:
self.sock.sendall(headerData + payload)
except Exception, err:
#if not 'Bad file descriptor' in err:
shared.printLock.acquire()
sys.stderr.write('sock.sendall error: %s\n' % err)
shared.printLock.release()
#We have received a getdata request from our peer
def recgetdata(self, data):
numberOfRequestedInventoryItems, lengthOfVarint = decodeVarint(data[:10])
if len(data) < lengthOfVarint + (32 * numberOfRequestedInventoryItems):
print 'getdata message does not contain enough data. Ignoring.'
return
for i in xrange(numberOfRequestedInventoryItems):
hash = data[lengthOfVarint+(i*32):32+lengthOfVarint+(i*32)]
shared.printLock.acquire()
print 'received getdata request for item:', hash.encode('hex')
shared.printLock.release()
#print 'inventory is', shared.inventory
if hash in shared.inventory:
objectType, streamNumber, payload, receivedTime = shared.inventory[hash]
self.sendData(objectType,payload)
else:
t = (hash,)
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''select objecttype, payload from inventory where hash=?''')
shared.sqlSubmitQueue.put(t)
queryreturn = shared.sqlReturnQueue.get()
shared.sqlLock.release()
if queryreturn <> []:
for row in queryreturn:
objectType, payload = row
self.sendData(objectType,payload)
else:
print 'Someone asked for an object with a getdata which is not in either our memory inventory or our SQL inventory. That shouldn\'t have happened.'
#Our peer has requested (in a getdata message) that we send an object.
def sendData(self,objectType,payload):
headerData = '\xe9\xbe\xb4\xd9' #magic bits, slighly different from Bitcoin's magic bits.
if objectType == 'pubkey':
shared.printLock.acquire()
print 'sending pubkey'
shared.printLock.release()
headerData += 'pubkey\x00\x00\x00\x00\x00\x00'
elif objectType == 'getpubkey' or objectType == 'pubkeyrequest':
shared.printLock.acquire()
print 'sending getpubkey'
shared.printLock.release()
headerData += 'getpubkey\x00\x00\x00'
elif objectType == 'msg':
shared.printLock.acquire()
print 'sending msg'
shared.printLock.release()
headerData += 'msg\x00\x00\x00\x00\x00\x00\x00\x00\x00'
elif objectType == 'broadcast':
shared.printLock.acquire()
print 'sending broadcast'
shared.printLock.release()
headerData += 'broadcast\x00\x00\x00'
else:
sys.stderr.write('Error: sendData has been asked to send a strange objectType: %s\n' % str(objectType))
return
headerData += pack('>L',len(payload)) #payload length.
headerData += hashlib.sha512(payload).digest()[:4]
try:
self.sock.sendall(headerData + payload)
except Exception, err:
#if not 'Bad file descriptor' in err:
shared.printLock.acquire()
sys.stderr.write('sock.sendall error: %s\n' % err)
shared.printLock.release()
#Send an inv message with just one hash to all of our peers
def broadcastinv(self,hash):
shared.printLock.acquire()
print 'broadcasting inv with hash:', hash.encode('hex')
shared.printLock.release()
shared.broadcastToSendDataQueues((self.streamNumber, 'sendinv', hash))
#We have received an addr message.
def recaddr(self,data):
listOfAddressDetailsToBroadcastToPeers = []
numberOfAddressesIncluded = 0
numberOfAddressesIncluded, lengthOfNumberOfAddresses = decodeVarint(data[:10])
if verbose >= 1:
shared.printLock.acquire()
print 'addr message contains', numberOfAddressesIncluded, 'IP addresses.'
shared.printLock.release()
if self.remoteProtocolVersion == 1:
if numberOfAddressesIncluded > 1000 or numberOfAddressesIncluded == 0:
return
if len(data) != lengthOfNumberOfAddresses + (34 * numberOfAddressesIncluded):
print 'addr message does not contain the correct amount of data. Ignoring.'
return
needToWriteKnownNodesToDisk = False
for i in range(0,numberOfAddressesIncluded):
try:
if data[16+lengthOfNumberOfAddresses+(34*i):28+lengthOfNumberOfAddresses+(34*i)] != '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF':
shared.printLock.acquire()
print 'Skipping IPv6 address.', repr(data[16+lengthOfNumberOfAddresses+(34*i):28+lengthOfNumberOfAddresses+(34*i)])
shared.printLock.release()
continue
except Exception, err:
shared.printLock.acquire()
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (to test for an IPv6 address). Message: %s\n' % str(err))
shared.printLock.release()
break #giving up on unpacking any more. We should still be connected however.
try:
recaddrStream, = unpack('>I',data[4+lengthOfNumberOfAddresses+(34*i):8+lengthOfNumberOfAddresses+(34*i)])
except Exception, err:
shared.printLock.acquire()
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (recaddrStream). Message: %s\n' % str(err))
shared.printLock.release()
break #giving up on unpacking any more. We should still be connected however.
if recaddrStream == 0:
continue
if recaddrStream != self.streamNumber and recaddrStream != (self.streamNumber * 2) and recaddrStream != ((self.streamNumber * 2) + 1): #if the embedded stream number is not in my stream or either of my child streams then ignore it. Someone might be trying funny business.
continue
try:
recaddrServices, = unpack('>Q',data[8+lengthOfNumberOfAddresses+(34*i):16+lengthOfNumberOfAddresses+(34*i)])
except Exception, err:
shared.printLock.acquire()
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (recaddrServices). Message: %s\n' % str(err))
shared.printLock.release()
break #giving up on unpacking any more. We should still be connected however.
try:
recaddrPort, = unpack('>H',data[32+lengthOfNumberOfAddresses+(34*i):34+lengthOfNumberOfAddresses+(34*i)])
except Exception, err:
shared.printLock.acquire()
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (recaddrPort). Message: %s\n' % str(err))
shared.printLock.release()
break #giving up on unpacking any more. We should still be connected however.
#print 'Within recaddr(): IP', recaddrIP, ', Port', recaddrPort, ', i', i
hostFromAddrMessage = socket.inet_ntoa(data[28+lengthOfNumberOfAddresses+(34*i):32+lengthOfNumberOfAddresses+(34*i)])
#print 'hostFromAddrMessage', hostFromAddrMessage
if data[28+lengthOfNumberOfAddresses+(34*i)] == '\x7F':
print 'Ignoring IP address in loopback range:', hostFromAddrMessage
continue
if data[28+lengthOfNumberOfAddresses+(34*i)] == '\x0A':
print 'Ignoring IP address in private range:', hostFromAddrMessage
continue
if data[28+lengthOfNumberOfAddresses+(34*i):30+lengthOfNumberOfAddresses+(34*i)] == '\xC0A8':
print 'Ignoring IP address in private range:', hostFromAddrMessage
continue
timeSomeoneElseReceivedMessageFromThisNode, = unpack('>I',data[lengthOfNumberOfAddresses+(34*i):4+lengthOfNumberOfAddresses+(34*i)]) #This is the 'time' value in the received addr message.
if recaddrStream not in shared.knownNodes: #knownNodes is a dictionary of dictionaries with one outer dictionary for each stream. If the outer stream dictionary doesn't exist yet then we must make it.
shared.knownNodesLock.acquire()
shared.knownNodes[recaddrStream] = {}
shared.knownNodesLock.release()
if hostFromAddrMessage not in shared.knownNodes[recaddrStream]:
if len(shared.knownNodes[recaddrStream]) < 20000 and timeSomeoneElseReceivedMessageFromThisNode > (int(time.time())-10800) and timeSomeoneElseReceivedMessageFromThisNode < (int(time.time()) + 10800): #If we have more than 20000 nodes in our list already then just forget about adding more. Also, make sure that the time that someone else received a message from this node is within three hours from now.
shared.knownNodesLock.acquire()
shared.knownNodes[recaddrStream][hostFromAddrMessage] = (recaddrPort, timeSomeoneElseReceivedMessageFromThisNode)
shared.knownNodesLock.release()
needToWriteKnownNodesToDisk = True
hostDetails = (timeSomeoneElseReceivedMessageFromThisNode, recaddrStream, recaddrServices, hostFromAddrMessage, recaddrPort)
listOfAddressDetailsToBroadcastToPeers.append(hostDetails)
else:
PORT, timeLastReceivedMessageFromThisNode = shared.knownNodes[recaddrStream][hostFromAddrMessage]#PORT in this case is either the port we used to connect to the remote node, or the port that was specified by someone else in a past addr message.
if (timeLastReceivedMessageFromThisNode < timeSomeoneElseReceivedMessageFromThisNode) and (timeSomeoneElseReceivedMessageFromThisNode < int(time.time())):
shared.knownNodesLock.acquire()
shared.knownNodes[recaddrStream][hostFromAddrMessage] = (PORT, timeSomeoneElseReceivedMessageFromThisNode)
shared.knownNodesLock.release()
if PORT != recaddrPort:
print 'Strange occurance: The port specified in an addr message', str(recaddrPort),'does not match the port',str(PORT),'that this program (or some other peer) used to connect to it',str(hostFromAddrMessage),'. Perhaps they changed their port or are using a strange NAT configuration.'
if needToWriteKnownNodesToDisk: #Runs if any nodes were new to us. Also, share those nodes with our peers.
shared.knownNodesLock.acquire()
output = open(shared.appdata + 'knownnodes.dat', 'wb')
pickle.dump(shared.knownNodes, output)
output.close()
shared.knownNodesLock.release()
self.broadcastaddr(listOfAddressDetailsToBroadcastToPeers) #no longer broadcast
shared.printLock.acquire()
print 'knownNodes currently has', len(shared.knownNodes[self.streamNumber]), 'nodes for this stream.'
shared.printLock.release()
elif self.remoteProtocolVersion >= 2: #The difference is that in protocol version 2, network addresses use 64 bit times rather than 32 bit times.
if numberOfAddressesIncluded > 1000 or numberOfAddressesIncluded == 0:
return
if len(data) != lengthOfNumberOfAddresses + (38 * numberOfAddressesIncluded):
print 'addr message does not contain the correct amount of data. Ignoring.'
return
needToWriteKnownNodesToDisk = False
for i in range(0,numberOfAddressesIncluded):
try:
if data[20+lengthOfNumberOfAddresses+(38*i):32+lengthOfNumberOfAddresses+(38*i)] != '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF':
shared.printLock.acquire()
print 'Skipping IPv6 address.', repr(data[20+lengthOfNumberOfAddresses+(38*i):32+lengthOfNumberOfAddresses+(38*i)])
shared.printLock.release()
continue
except Exception, err:
shared.printLock.acquire()
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (to test for an IPv6 address). Message: %s\n' % str(err))
shared.printLock.release()
break #giving up on unpacking any more. We should still be connected however.
try:
recaddrStream, = unpack('>I',data[8+lengthOfNumberOfAddresses+(38*i):12+lengthOfNumberOfAddresses+(38*i)])
except Exception, err:
shared.printLock.acquire()
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (recaddrStream). Message: %s\n' % str(err))
shared.printLock.release()
break #giving up on unpacking any more. We should still be connected however.
if recaddrStream == 0:
continue
if recaddrStream != self.streamNumber and recaddrStream != (self.streamNumber * 2) and recaddrStream != ((self.streamNumber * 2) + 1): #if the embedded stream number is not in my stream or either of my child streams then ignore it. Someone might be trying funny business.
continue
try:
recaddrServices, = unpack('>Q',data[12+lengthOfNumberOfAddresses+(38*i):20+lengthOfNumberOfAddresses+(38*i)])
except Exception, err:
shared.printLock.acquire()
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (recaddrServices). Message: %s\n' % str(err))
shared.printLock.release()
break #giving up on unpacking any more. We should still be connected however.
try:
recaddrPort, = unpack('>H',data[36+lengthOfNumberOfAddresses+(38*i):38+lengthOfNumberOfAddresses+(38*i)])
except Exception, err:
shared.printLock.acquire()
sys.stderr.write('ERROR TRYING TO UNPACK recaddr (recaddrPort). Message: %s\n' % str(err))
shared.printLock.release()
break #giving up on unpacking any more. We should still be connected however.
#print 'Within recaddr(): IP', recaddrIP, ', Port', recaddrPort, ', i', i
hostFromAddrMessage = socket.inet_ntoa(data[32+lengthOfNumberOfAddresses+(38*i):36+lengthOfNumberOfAddresses+(38*i)])
#print 'hostFromAddrMessage', hostFromAddrMessage
if data[32+lengthOfNumberOfAddresses+(38*i)] == '\x7F':
print 'Ignoring IP address in loopback range:', hostFromAddrMessage
continue
if data[32+lengthOfNumberOfAddresses+(38*i)] == '\x0A':
print 'Ignoring IP address in private range:', hostFromAddrMessage
continue
if data[32+lengthOfNumberOfAddresses+(38*i):34+lengthOfNumberOfAddresses+(38*i)] == '\xC0A8':
print 'Ignoring IP address in private range:', hostFromAddrMessage
continue
timeSomeoneElseReceivedMessageFromThisNode, = unpack('>Q',data[lengthOfNumberOfAddresses+(38*i):8+lengthOfNumberOfAddresses+(38*i)]) #This is the 'time' value in the received addr message. 64-bit.
if recaddrStream not in shared.knownNodes: #knownNodes is a dictionary of dictionaries with one outer dictionary for each stream. If the outer stream dictionary doesn't exist yet then we must make it.
shared.knownNodesLock.acquire()
shared.knownNodes[recaddrStream] = {}
shared.knownNodesLock.release()
if hostFromAddrMessage not in shared.knownNodes[recaddrStream]:
if len(shared.knownNodes[recaddrStream]) < 20000 and timeSomeoneElseReceivedMessageFromThisNode > (int(time.time())-10800) and timeSomeoneElseReceivedMessageFromThisNode < (int(time.time()) + 10800): #If we have more than 20000 nodes in our list already then just forget about adding more. Also, make sure that the time that someone else received a message from this node is within three hours from now.
shared.knownNodesLock.acquire()
shared.knownNodes[recaddrStream][hostFromAddrMessage] = (recaddrPort, timeSomeoneElseReceivedMessageFromThisNode)
shared.knownNodesLock.release()
print 'added new node', hostFromAddrMessage, 'to knownNodes in stream', recaddrStream
needToWriteKnownNodesToDisk = True
hostDetails = (timeSomeoneElseReceivedMessageFromThisNode, recaddrStream, recaddrServices, hostFromAddrMessage, recaddrPort)
listOfAddressDetailsToBroadcastToPeers.append(hostDetails)
else:
PORT, timeLastReceivedMessageFromThisNode = shared.knownNodes[recaddrStream][hostFromAddrMessage]#PORT in this case is either the port we used to connect to the remote node, or the port that was specified by someone else in a past addr message.
if (timeLastReceivedMessageFromThisNode < timeSomeoneElseReceivedMessageFromThisNode) and (timeSomeoneElseReceivedMessageFromThisNode < int(time.time())):
shared.knownNodesLock.acquire()
shared.knownNodes[recaddrStream][hostFromAddrMessage] = (PORT, timeSomeoneElseReceivedMessageFromThisNode)
shared.knownNodesLock.release()
if PORT != recaddrPort:
print 'Strange occurance: The port specified in an addr message', str(recaddrPort),'does not match the port',str(PORT),'that this program (or some other peer) used to connect to it',str(hostFromAddrMessage),'. Perhaps they changed their port or are using a strange NAT configuration.'
if needToWriteKnownNodesToDisk: #Runs if any nodes were new to us. Also, share those nodes with our peers.
shared.knownNodesLock.acquire()
output = open(shared.appdata + 'knownnodes.dat', 'wb')
pickle.dump(shared.knownNodes, output)
output.close()
shared.knownNodesLock.release()
self.broadcastaddr(listOfAddressDetailsToBroadcastToPeers)
shared.printLock.acquire()
print 'knownNodes currently has', len(shared.knownNodes[self.streamNumber]), 'nodes for this stream.'
shared.printLock.release()
#Function runs when we want to broadcast an addr message to all of our peers. Runs when we learn of nodes that we didn't previously know about and want to share them with our peers.
def broadcastaddr(self,listOfAddressDetailsToBroadcastToPeers):
numberOfAddressesInAddrMessage = len(listOfAddressDetailsToBroadcastToPeers)
payload = ''
for hostDetails in listOfAddressDetailsToBroadcastToPeers:
timeLastReceivedMessageFromThisNode, streamNumber, services, host, port = hostDetails
payload += pack('>Q',timeLastReceivedMessageFromThisNode) #now uses 64-bit time
payload += pack('>I',streamNumber)
payload += pack('>q',services) #service bit flags offered by this node
payload += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + socket.inet_aton(host)
payload += pack('>H',port)#remote port
payload = encodeVarint(numberOfAddressesInAddrMessage) + payload
datatosend = '\xE9\xBE\xB4\xD9addr\x00\x00\x00\x00\x00\x00\x00\x00'
datatosend = datatosend + pack('>L',len(payload)) #payload length
datatosend = datatosend + hashlib.sha512(payload).digest()[0:4]
datatosend = datatosend + payload
if verbose >= 1:
shared.printLock.acquire()
print 'Broadcasting addr with', numberOfAddressesInAddrMessage, 'entries.'
shared.printLock.release()
shared.broadcastToSendDataQueues((self.streamNumber, 'sendaddr', datatosend))
#Send a big addr message to our peer
def sendaddr(self):
addrsInMyStream = {}
addrsInChildStreamLeft = {}
addrsInChildStreamRight = {}
#print 'knownNodes', shared.knownNodes
#We are going to share a maximum number of 1000 addrs with our peer. 500 from this stream, 250 from the left child stream, and 250 from the right child stream.
if len(shared.knownNodes[self.streamNumber]) > 0:
for i in range(500):
random.seed()
HOST, = random.sample(shared.knownNodes[self.streamNumber], 1)
if self.isHostInPrivateIPRange(HOST):
continue
addrsInMyStream[HOST] = shared.knownNodes[self.streamNumber][HOST]
if len(shared.knownNodes[self.streamNumber*2]) > 0:
for i in range(250):
random.seed()
HOST, = random.sample(shared.knownNodes[self.streamNumber*2], 1)
if self.isHostInPrivateIPRange(HOST):
continue
addrsInChildStreamLeft[HOST] = shared.knownNodes[self.streamNumber*2][HOST]
if len(shared.knownNodes[(self.streamNumber*2)+1]) > 0:
for i in range(250):
random.seed()
HOST, = random.sample(shared.knownNodes[(self.streamNumber*2)+1], 1)
if self.isHostInPrivateIPRange(HOST):
continue
addrsInChildStreamRight[HOST] = shared.knownNodes[(self.streamNumber*2)+1][HOST]
numberOfAddressesInAddrMessage = 0
payload = ''
#print 'addrsInMyStream.items()', addrsInMyStream.items()
for HOST, value in addrsInMyStream.items():
PORT, timeLastReceivedMessageFromThisNode = value
if timeLastReceivedMessageFromThisNode > (int(time.time())- maximumAgeOfNodesThatIAdvertiseToOthers): #If it is younger than 3 hours old..
numberOfAddressesInAddrMessage += 1
if self.remoteProtocolVersion == 1:
payload += pack('>I',timeLastReceivedMessageFromThisNode) #32-bit time
else:
payload += pack('>Q',timeLastReceivedMessageFromThisNode) #64-bit time
payload += pack('>I',self.streamNumber)
payload += pack('>q',1) #service bit flags offered by this node
payload += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + socket.inet_aton(HOST)
payload += pack('>H',PORT)#remote port
for HOST, value in addrsInChildStreamLeft.items():
PORT, timeLastReceivedMessageFromThisNode = value
if timeLastReceivedMessageFromThisNode > (int(time.time())- maximumAgeOfNodesThatIAdvertiseToOthers): #If it is younger than 3 hours old..
numberOfAddressesInAddrMessage += 1
if self.remoteProtocolVersion == 1:
payload += pack('>I',timeLastReceivedMessageFromThisNode) #32-bit time
else:
payload += pack('>Q',timeLastReceivedMessageFromThisNode) #64-bit time
payload += pack('>I',self.streamNumber*2)
payload += pack('>q',1) #service bit flags offered by this node
payload += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + socket.inet_aton(HOST)
payload += pack('>H',PORT)#remote port
for HOST, value in addrsInChildStreamRight.items():
PORT, timeLastReceivedMessageFromThisNode = value
if timeLastReceivedMessageFromThisNode > (int(time.time())- maximumAgeOfNodesThatIAdvertiseToOthers): #If it is younger than 3 hours old..
numberOfAddressesInAddrMessage += 1
if self.remoteProtocolVersion == 1:
payload += pack('>I',timeLastReceivedMessageFromThisNode) #32-bit time
else:
payload += pack('>Q',timeLastReceivedMessageFromThisNode) #64-bit time
payload += pack('>I',(self.streamNumber*2)+1)
payload += pack('>q',1) #service bit flags offered by this node
payload += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + socket.inet_aton(HOST)
payload += pack('>H',PORT)#remote port
payload = encodeVarint(numberOfAddressesInAddrMessage) + payload
datatosend = '\xE9\xBE\xB4\xD9addr\x00\x00\x00\x00\x00\x00\x00\x00'
datatosend = datatosend + pack('>L',len(payload)) #payload length
datatosend = datatosend + hashlib.sha512(payload).digest()[0:4]
datatosend = datatosend + payload
try:
self.sock.sendall(datatosend)
if verbose >= 1:
shared.printLock.acquire()
print 'Sending addr with', numberOfAddressesInAddrMessage, 'entries.'
shared.printLock.release()
except Exception, err:
#if not 'Bad file descriptor' in err:
shared.printLock.acquire()
sys.stderr.write('sock.sendall error: %s\n' % err)
shared.printLock.release()
#We have received a version message
def recversion(self,data):
if len(data) < 83:
#This version message is unreasonably short. Forget it.
return
elif not self.verackSent:
self.remoteProtocolVersion, = unpack('>L',data[:4])
#print 'remoteProtocolVersion', self.remoteProtocolVersion
self.myExternalIP = socket.inet_ntoa(data[40:44])
#print 'myExternalIP', self.myExternalIP
self.remoteNodeIncomingPort, = unpack('>H',data[70:72])
#print 'remoteNodeIncomingPort', self.remoteNodeIncomingPort
useragentLength, lengthOfUseragentVarint = decodeVarint(data[80:84])
readPosition = 80 + lengthOfUseragentVarint
useragent = data[readPosition:readPosition+useragentLength]
readPosition += useragentLength
numberOfStreamsInVersionMessage, lengthOfNumberOfStreamsInVersionMessage = decodeVarint(data[readPosition:])
readPosition += lengthOfNumberOfStreamsInVersionMessage
self.streamNumber, lengthOfRemoteStreamNumber = decodeVarint(data[readPosition:])
shared.printLock.acquire()
print 'Remote node useragent:', useragent, ' stream number:', self.streamNumber
shared.printLock.release()
if self.streamNumber != 1:
#self.sock.shutdown(socket.SHUT_RDWR)
#self.sock.close()
shared.broadcastToSendDataQueues((0, 'shutdown', self.HOST))
shared.printLock.acquire()
print 'Closed connection to', self.HOST, 'because they are interested in stream', self.streamNumber,'.'
shared.printLock.release()
return
shared.connectedHostsList[self.HOST] = 1 #We use this data structure to not only keep track of what hosts we are connected to so that we don't try to connect to them again, but also to list the connections count on the Network Status tab.
#If this was an incoming connection, then the sendData thread doesn't know the stream. We have to set it.
if not self.initiatedConnection:
shared.broadcastToSendDataQueues((0,'setStreamNumber',(self.HOST,self.streamNumber)))
if data[72:80] == eightBytesOfRandomDataUsedToDetectConnectionsToSelf:
#self.sock.shutdown(socket.SHUT_RDWR)
#self.sock.close()
shared.broadcastToSendDataQueues((0, 'shutdown', self.HOST))
shared.printLock.acquire()
print 'Closing connection to myself: ', self.HOST
shared.printLock.release()
return
shared.broadcastToSendDataQueues((0,'setRemoteProtocolVersion',(self.HOST,self.remoteProtocolVersion)))
shared.knownNodesLock.acquire()
shared.knownNodes[self.streamNumber][self.HOST] = (self.remoteNodeIncomingPort, int(time.time()))
output = open(shared.appdata + 'knownnodes.dat', 'wb')
pickle.dump(shared.knownNodes, output)
output.close()
shared.knownNodesLock.release()
self.sendverack()
if self.initiatedConnection == False:
self.sendversion()
#Sends a version message
def sendversion(self):
shared.printLock.acquire()
print 'Sending version message'
shared.printLock.release()
try:
self.sock.sendall(assembleVersionMessage(self.HOST,self.PORT,self.streamNumber))
except Exception, err:
#if not 'Bad file descriptor' in err:
shared.printLock.acquire()
sys.stderr.write('sock.sendall error: %s\n' % err)
shared.printLock.release()
#Sends a verack message
def sendverack(self):
shared.printLock.acquire()
print 'Sending verack'
shared.printLock.release()
try:
self.sock.sendall('\xE9\xBE\xB4\xD9\x76\x65\x72\x61\x63\x6B\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xcf\x83\xe1\x35')
except Exception, err:
#if not 'Bad file descriptor' in err:
shared.printLock.acquire()
sys.stderr.write('sock.sendall error: %s\n' % err)
shared.printLock.release()
#cf 83 e1 35
self.verackSent = True
if self.verackReceived == True:
self.connectionFullyEstablished()
def isHostInPrivateIPRange(self,host):
if host[:3] == '10.':
return True
if host[:4] == '172.':
if host[6] == '.':
if int(host[4:6]) >= 16 and int(host[4:6]) <= 31:
return True
if host[:8] == '192.168.':
return True
return False
#Every connection to a peer has a sendDataThread (and also a receiveDataThread).
class sendDataThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self.mailbox = Queue.Queue()
shared.sendDataQueues.append(self.mailbox)
shared.printLock.acquire()
print 'The length of sendDataQueues at sendDataThread init is:', len(shared.sendDataQueues)
shared.printLock.release()
self.data = ''
def setup(self,sock,HOST,PORT,streamNumber,objectsOfWhichThisRemoteNodeIsAlreadyAware):
self.sock = sock
self.HOST = HOST
self.PORT = PORT
self.streamNumber = streamNumber
self.remoteProtocolVersion = -1 #This must be set using setRemoteProtocolVersion command which is sent through the self.mailbox queue.
self.lastTimeISentData = int(time.time()) #If this value increases beyond five minutes ago, we'll send a pong message to keep the connection alive.
self.objectsOfWhichThisRemoteNodeIsAlreadyAware = objectsOfWhichThisRemoteNodeIsAlreadyAware
shared.printLock.acquire()
print 'The streamNumber of this sendDataThread (ID:', str(id(self))+') at setup() is', self.streamNumber
shared.printLock.release()
def sendVersionMessage(self):
datatosend = assembleVersionMessage(self.HOST,self.PORT,self.streamNumber)#the IP and port of the remote host, and my streamNumber.
shared.printLock.acquire()
print 'Sending version packet: ', repr(datatosend)
shared.printLock.release()
try:
self.sock.sendall(datatosend)
except Exception, err:
#if not 'Bad file descriptor' in err:
shared.printLock.acquire()
sys.stderr.write('sock.sendall error: %s\n' % err)
shared.printLock.release()
self.versionSent = 1
def run(self):
while True:
deststream,command,data = self.mailbox.get()
#shared.printLock.acquire()
#print 'sendDataThread, destream:', deststream, ', Command:', command, ', ID:',id(self), ', HOST:', self.HOST
#shared.printLock.release()
if deststream == self.streamNumber or deststream == 0:
if command == 'shutdown':
if data == self.HOST or data == 'all':
shared.printLock.acquire()
print 'sendDataThread (associated with', self.HOST,') ID:',id(self), 'shutting down now.'
shared.printLock.release()
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
shared.sendDataQueues.remove(self.mailbox)
shared.printLock.acquire()
print 'len of sendDataQueues', len(shared.sendDataQueues)
shared.printLock.release()
break
#When you receive an incoming connection, a sendDataThread is created even though you don't yet know what stream number the remote peer is interested in. They will tell you in a version message and if you too are interested in that stream then you will continue on with the connection and will set the streamNumber of this send data thread here:
elif command == 'setStreamNumber':
hostInMessage, specifiedStreamNumber = data
if hostInMessage == self.HOST:
shared.printLock.acquire()
print 'setting the stream number in the sendData thread (ID:',id(self), ') to', specifiedStreamNumber
shared.printLock.release()
self.streamNumber = specifiedStreamNumber
elif command == 'setRemoteProtocolVersion':
hostInMessage, specifiedRemoteProtocolVersion = data
if hostInMessage == self.HOST:
shared.printLock.acquire()
print 'setting the remote node\'s protocol version in the sendData thread (ID:',id(self), ') to', specifiedRemoteProtocolVersion
shared.printLock.release()
self.remoteProtocolVersion = specifiedRemoteProtocolVersion
elif command == 'sendaddr':
if self.remoteProtocolVersion == 1:
shared.printLock.acquire()
print 'a sendData thread is not sending an addr message to this particular peer ('+self.HOST+') because their protocol version is 1.'
shared.printLock.release()
else:
try:
#To prevent some network analysis, 'leak' the data out to our peer after waiting a random amount of time unless we have a long list of messages in our queue to send.
random.seed()
time.sleep(random.randrange(0, 10))
self.sock.sendall(data)
self.lastTimeISentData = int(time.time())
except:
print 'self.sock.sendall failed'
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
shared.sendDataQueues.remove(self.mailbox)
print 'sendDataThread thread (ID:',str(id(self))+') ending now. Was connected to', self.HOST
break
elif command == 'sendinv':
if data not in self.objectsOfWhichThisRemoteNodeIsAlreadyAware:
payload = '\x01' + data
headerData = '\xe9\xbe\xb4\xd9' #magic bits, slighly different from Bitcoin's magic bits.
headerData += 'inv\x00\x00\x00\x00\x00\x00\x00\x00\x00'
headerData += pack('>L',len(payload))
headerData += hashlib.sha512(payload).digest()[:4]
#To prevent some network analysis, 'leak' the data out to our peer after waiting a random amount of time
random.seed()
time.sleep(random.randrange(0, 10))
try:
self.sock.sendall(headerData + payload)
self.lastTimeISentData = int(time.time())
except:
print 'self.sock.sendall failed'
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
shared.sendDataQueues.remove(self.mailbox)
print 'sendDataThread thread (ID:',str(id(self))+') ending now. Was connected to', self.HOST
break
elif command == 'pong':
if self.lastTimeISentData < (int(time.time()) - 298):
#Send out a pong message to keep the connection alive.
shared.printLock.acquire()
print 'Sending pong to', self.HOST, 'to keep connection alive.'
shared.printLock.release()
try:
self.sock.sendall('\xE9\xBE\xB4\xD9\x70\x6F\x6E\x67\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xcf\x83\xe1\x35')
self.lastTimeISentData = int(time.time())
except:
print 'send pong failed'
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
shared.sendDataQueues.remove(self.mailbox)
print 'sendDataThread thread', self, 'ending now. Was connected to', self.HOST
break
else:
shared.printLock.acquire()
print 'sendDataThread ID:',id(self),'ignoring command', command,'because the thread is not in stream',deststream
shared.printLock.release()
def isInSqlInventory(hash):
t = (hash,)
shared.sqlLock.acquire()
shared.sqlSubmitQueue.put('''select hash from inventory where hash=?''')
shared.sqlSubmitQueue.put(t)
queryreturn = shared.sqlReturnQueue.get()
shared.sqlLock.release()
if queryreturn == []:
return False
else:
return True
def convertIntToString(n):
a = __builtins__.hex(n)
if a[-1:] == 'L':
a = a[:-1]
if (len(a) % 2) == 0:
return a[2:].decode('hex')
else:
return ('0'+a[2:]).decode(