884 lines
41 KiB
Python
884 lines
41 KiB
Python
from __future__ import division
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softwareVersion = '0.5.2'
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verbose = 1
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maximumAgeOfAnObjectThatIAmWillingToAccept = 216000 # This is obsolete with the change to protocol v3 but the singleCleaner thread still hasn't been updated so we need this a little longer.
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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.
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maximumAgeOfNodesThatIAdvertiseToOthers = 10800 # Equals three hours
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useVeryEasyProofOfWorkForTesting = False # If you set this to True while on the normal network, you won't be able to send or sometimes receive messages.
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# Libraries.
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import collections
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import ConfigParser
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import os
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import pickle
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import Queue
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import random
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import socket
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import sys
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import stat
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import threading
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import time
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import shutil # used for moving the data folder and copying keys.dat
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import datetime
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from os import path, environ
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from struct import Struct
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import traceback
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# Project imports.
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from addresses import *
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import highlevelcrypto
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import shared
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#import helper_startup
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from helper_sql import *
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config = ConfigParser.SafeConfigParser()
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myECCryptorObjects = {}
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MyECSubscriptionCryptorObjects = {}
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myAddressesByHash = {} #The key in this dictionary is the RIPE hash which is encoded in an address and value is the address itself.
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myAddressesByTag = {} # The key in this dictionary is the tag generated from the address.
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broadcastSendersForWhichImWatching = {}
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workerQueue = Queue.Queue()
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UISignalQueue = Queue.Queue()
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addressGeneratorQueue = Queue.Queue()
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knownNodesLock = threading.Lock()
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knownNodes = {}
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sendDataQueues = [] #each sendData thread puts its queue in this list.
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inventory = {} #of objects (like msg payloads and pubkey payloads) Does not include protocol headers (the first 24 bytes of each packet).
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inventoryLock = threading.Lock() #Guarantees that two receiveDataThreads don't receive and process the same message concurrently (probably sent by a malicious individual)
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printLock = threading.Lock()
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objectProcessorQueueSizeLock = threading.Lock()
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objectProcessorQueueSize = 0 # in Bytes. We maintain this to prevent nodes from flooing us with objects which take up too much memory. If this gets too big we'll sleep before asking for further objects.
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appdata = '' #holds the location of the application data storage directory
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statusIconColor = 'red'
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connectedHostsList = {} #List of hosts to which we are connected. Used to guarantee that the outgoingSynSender threads won't connect to the same remote node twice.
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shutdown = 0 #Set to 1 by the doCleanShutdown function. Used to tell the proof of work worker threads to exit.
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alreadyAttemptedConnectionsList = {
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} # This is a list of nodes to which we have already attempted a connection
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alreadyAttemptedConnectionsListLock = threading.Lock()
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alreadyAttemptedConnectionsListResetTime = int(
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time.time()) # used to clear out the alreadyAttemptedConnectionsList periodically so that we will retry connecting to hosts to which we have already tried to connect.
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numberOfObjectsThatWeHaveYetToGetPerPeer = {}
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neededPubkeys = {}
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eightBytesOfRandomDataUsedToDetectConnectionsToSelf = pack(
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'>Q', random.randrange(1, 18446744073709551615))
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successfullyDecryptMessageTimings = [
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] # A list of the amounts of time it took to successfully decrypt msg messages
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apiAddressGeneratorReturnQueue = Queue.Queue(
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) # The address generator thread uses this queue to get information back to the API thread.
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ackdataForWhichImWatching = {}
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clientHasReceivedIncomingConnections = False #used by API command clientStatus
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numberOfMessagesProcessed = 0
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numberOfBroadcastsProcessed = 0
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numberOfPubkeysProcessed = 0
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numberOfInventoryLookupsPerformed = 0
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numberOfBytesReceived = 0 # Used for the 'network status' page
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numberOfBytesSent = 0 # Used for the 'network status' page
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numberOfBytesReceivedLastSecond = 0 # used for the bandwidth rate limit
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numberOfBytesSentLastSecond = 0 # used for the bandwidth rate limit
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lastTimeWeResetBytesReceived = 0 # used for the bandwidth rate limit
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lastTimeWeResetBytesSent = 0 # used for the bandwidth rate limit
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sendDataLock = threading.Lock() # used for the bandwidth rate limit
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receiveDataLock = threading.Lock() # used for the bandwidth rate limit
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daemon = False
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inventorySets = {} # key = streamNumer, value = a set which holds the inventory object hashes that we are aware of. This is used whenever we receive an inv message from a peer to check to see what items are new to us. We don't delete things out of it; instead, the singleCleaner thread clears and refills it every couple hours.
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needToWriteKnownNodesToDisk = False # If True, the singleCleaner will write it to disk eventually.
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maximumLengthOfTimeToBotherResendingMessages = 0
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objectProcessorQueue = Queue.Queue(
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) # receiveDataThreads dump objects they hear on the network into this queue to be processed.
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streamsInWhichIAmParticipating = {}
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#If changed, these values will cause particularly unexpected behavior: You won't be able to either send or receive messages because the proof of work you do (or demand) won't match that done or demanded by others. Don't change them!
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networkDefaultProofOfWorkNonceTrialsPerByte = 1000 #The amount of work that should be performed (and demanded) per byte of the payload.
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networkDefaultPayloadLengthExtraBytes = 1000 #To make sending short messages a little more difficult, this value is added to the payload length for use in calculating the proof of work target.
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# Remember here the RPC port read from namecoin.conf so we can restore to
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# it as default whenever the user changes the "method" selection for
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# namecoin integration to "namecoind".
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namecoinDefaultRpcPort = "8336"
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# When using py2exe or py2app, the variable frozen is added to the sys
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# namespace. This can be used to setup a different code path for
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# binary distributions vs source distributions.
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frozen = getattr(sys,'frozen', None)
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# If the trustedpeer option is specified in keys.dat then this will
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# contain a Peer which will be connected to instead of using the
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# addresses advertised by other peers. The client will only connect to
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# this peer and the timing attack mitigation will be disabled in order
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# to download data faster. The expected use case is where the user has
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# a fast connection to a trusted server where they run a BitMessage
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# daemon permanently. If they then run a second instance of the client
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# on a local machine periodically when they want to check for messages
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# it will sync with the network a lot faster without compromising
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# security.
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trustedPeer = None
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#Compiled struct for packing/unpacking headers
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#New code should use CreatePacket instead of Header.pack
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Header = Struct('!L12sL4s')
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#Create a packet
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def CreatePacket(command, payload=''):
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payload_length = len(payload)
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checksum = hashlib.sha512(payload).digest()[0:4]
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b = bytearray(Header.size + payload_length)
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Header.pack_into(b, 0, 0xE9BEB4D9, command, payload_length, checksum)
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b[Header.size:] = payload
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return bytes(b)
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def isInSqlInventory(hash):
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queryreturn = sqlQuery('''select hash from inventory where hash=?''', hash)
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return queryreturn != []
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def encodeHost(host):
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if host.find(':') == -1:
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return '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + \
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socket.inet_aton(host)
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else:
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return socket.inet_pton(socket.AF_INET6, host)
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def assembleVersionMessage(remoteHost, remotePort, myStreamNumber):
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payload = ''
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payload += pack('>L', 3) # protocol version.
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payload += pack('>q', 3) # bitflags of the services I offer.
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payload += pack('>q', int(time.time()))
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payload += pack(
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'>q', 1) # boolservices of remote connection; ignored by the remote host.
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payload += encodeHost(remoteHost)
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payload += pack('>H', remotePort) # remote IPv6 and port
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payload += pack('>q', 1) # bitflags of the services I offer.
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payload += '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF' + pack(
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'>L', 2130706433) # = 127.0.0.1. This will be ignored by the remote host. The actual remote connected IP will be used.
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payload += pack('>H', shared.config.getint(
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'bitmessagesettings', 'port'))
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random.seed()
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payload += eightBytesOfRandomDataUsedToDetectConnectionsToSelf
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userAgent = '/PyBitmessage:' + shared.softwareVersion + '/'
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payload += encodeVarint(len(userAgent))
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payload += userAgent
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payload += encodeVarint(
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1) # The number of streams about which I care. PyBitmessage currently only supports 1 per connection.
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payload += encodeVarint(myStreamNumber)
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return CreatePacket('version', payload)
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def assembleErrorMessage(fatal=0, banTime=0, inventoryVector='', errorText=''):
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payload = encodeVarint(fatal)
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payload += encodeVarint(banTime)
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payload += encodeVarint(len(inventoryVector))
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payload += inventoryVector
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payload += encodeVarint(len(errorText))
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payload += errorText
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return CreatePacket('error', payload)
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def lookupAppdataFolder():
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APPNAME = "PyBitmessage"
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if "BITMESSAGE_HOME" in environ:
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dataFolder = environ["BITMESSAGE_HOME"]
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if dataFolder[-1] not in [os.path.sep, os.path.altsep]:
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dataFolder += os.path.sep
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elif sys.platform == 'darwin':
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if "HOME" in environ:
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dataFolder = path.join(os.environ["HOME"], "Library/Application Support/", APPNAME) + '/'
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else:
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stringToLog = 'Could not find home folder, please report this message and your OS X version to the BitMessage Github.'
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if 'logger' in globals():
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logger.critical(stringToLog)
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else:
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print stringToLog
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sys.exit()
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elif 'win32' in sys.platform or 'win64' in sys.platform:
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dataFolder = path.join(environ['APPDATA'].decode(sys.getfilesystemencoding(), 'ignore'), APPNAME) + path.sep
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else:
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from shutil import move
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try:
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dataFolder = path.join(environ["XDG_CONFIG_HOME"], APPNAME)
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except KeyError:
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dataFolder = path.join(environ["HOME"], ".config", APPNAME)
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# Migrate existing data to the proper location if this is an existing install
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try:
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move(path.join(environ["HOME"], ".%s" % APPNAME), dataFolder)
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stringToLog = "Moving data folder to %s" % (dataFolder)
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if 'logger' in globals():
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logger.info(stringToLog)
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else:
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print stringToLog
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except IOError:
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# Old directory may not exist.
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pass
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dataFolder = dataFolder + '/'
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return dataFolder
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def codePath():
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if frozen == "macosx_app":
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codePath = os.environ.get("RESOURCEPATH")
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elif frozen: # windows
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codePath = sys._MEIPASS
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else:
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codePath = os.path.dirname(__file__)
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return codePath
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def isAddressInMyAddressBook(address):
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queryreturn = sqlQuery(
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'''select address from addressbook where address=?''',
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address)
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return queryreturn != []
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#At this point we should really just have a isAddressInMy(book, address)...
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def isAddressInMySubscriptionsList(address):
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queryreturn = sqlQuery(
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'''select * from subscriptions where address=?''',
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str(address))
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return queryreturn != []
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def isAddressInMyAddressBookSubscriptionsListOrWhitelist(address):
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if isAddressInMyAddressBook(address):
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return True
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queryreturn = sqlQuery('''SELECT address FROM whitelist where address=? and enabled = '1' ''', address)
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if queryreturn <> []:
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return True
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queryreturn = sqlQuery(
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'''select address from subscriptions where address=? and enabled = '1' ''',
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address)
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if queryreturn <> []:
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return True
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return False
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def safeConfigGetBoolean(section,field):
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try:
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return config.getboolean(section,field)
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except Exception, err:
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return False
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def decodeWalletImportFormat(WIFstring):
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fullString = arithmetic.changebase(WIFstring,58,256)
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privkey = fullString[:-4]
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if fullString[-4:] != hashlib.sha256(hashlib.sha256(privkey).digest()).digest()[:4]:
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logger.critical('Major problem! When trying to decode one of your private keys, the checksum '
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'failed. Here are the first 6 characters of the PRIVATE key: %s' % str(WIFstring)[:6])
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os._exit(0)
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return ""
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else:
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#checksum passed
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if privkey[0] == '\x80':
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return privkey[1:]
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else:
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logger.critical('Major problem! When trying to decode one of your private keys, the '
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'checksum passed but the key doesn\'t begin with hex 80. Here is the '
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'PRIVATE key: %s' % str(WIFstring))
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os._exit(0)
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return ""
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def reloadMyAddressHashes():
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logger.debug('reloading keys from keys.dat file')
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myECCryptorObjects.clear()
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myAddressesByHash.clear()
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myAddressesByTag.clear()
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#myPrivateKeys.clear()
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keyfileSecure = checkSensitiveFilePermissions(appdata + 'keys.dat')
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configSections = config.sections()
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hasEnabledKeys = False
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for addressInKeysFile in configSections:
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if addressInKeysFile <> 'bitmessagesettings':
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isEnabled = config.getboolean(addressInKeysFile, 'enabled')
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if isEnabled:
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hasEnabledKeys = True
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status,addressVersionNumber,streamNumber,hash = decodeAddress(addressInKeysFile)
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if addressVersionNumber == 2 or addressVersionNumber == 3 or addressVersionNumber == 4:
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# Returns a simple 32 bytes of information encoded in 64 Hex characters,
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# or null if there was an error.
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privEncryptionKey = decodeWalletImportFormat(
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config.get(addressInKeysFile, 'privencryptionkey')).encode('hex')
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if len(privEncryptionKey) == 64:#It is 32 bytes encoded as 64 hex characters
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myECCryptorObjects[hash] = highlevelcrypto.makeCryptor(privEncryptionKey)
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myAddressesByHash[hash] = addressInKeysFile
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tag = hashlib.sha512(hashlib.sha512(encodeVarint(
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addressVersionNumber) + encodeVarint(streamNumber) + hash).digest()).digest()[32:]
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myAddressesByTag[tag] = addressInKeysFile
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else:
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logger.error('Error in reloadMyAddressHashes: Can\'t handle address versions other than 2, 3, or 4.\n')
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if not keyfileSecure:
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fixSensitiveFilePermissions(appdata + 'keys.dat', hasEnabledKeys)
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def reloadBroadcastSendersForWhichImWatching():
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broadcastSendersForWhichImWatching.clear()
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MyECSubscriptionCryptorObjects.clear()
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queryreturn = sqlQuery('SELECT address FROM subscriptions where enabled=1')
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logger.debug('reloading subscriptions...')
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for row in queryreturn:
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address, = row
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status,addressVersionNumber,streamNumber,hash = decodeAddress(address)
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if addressVersionNumber == 2:
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broadcastSendersForWhichImWatching[hash] = 0
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#Now, for all addresses, even version 2 addresses, we should create Cryptor objects in a dictionary which we will use to attempt to decrypt encrypted broadcast messages.
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if addressVersionNumber <= 3:
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privEncryptionKey = hashlib.sha512(encodeVarint(addressVersionNumber)+encodeVarint(streamNumber)+hash).digest()[:32]
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MyECSubscriptionCryptorObjects[hash] = highlevelcrypto.makeCryptor(privEncryptionKey.encode('hex'))
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else:
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doubleHashOfAddressData = hashlib.sha512(hashlib.sha512(encodeVarint(
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addressVersionNumber) + encodeVarint(streamNumber) + hash).digest()).digest()
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tag = doubleHashOfAddressData[32:]
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privEncryptionKey = doubleHashOfAddressData[:32]
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MyECSubscriptionCryptorObjects[tag] = highlevelcrypto.makeCryptor(privEncryptionKey.encode('hex'))
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def isProofOfWorkSufficient(data,
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nonceTrialsPerByte=0,
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payloadLengthExtraBytes=0):
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if nonceTrialsPerByte < networkDefaultProofOfWorkNonceTrialsPerByte:
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nonceTrialsPerByte = networkDefaultProofOfWorkNonceTrialsPerByte
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if payloadLengthExtraBytes < networkDefaultPayloadLengthExtraBytes:
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payloadLengthExtraBytes = networkDefaultPayloadLengthExtraBytes
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endOfLifeTime, = unpack('>Q', data[8:16])
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TTL = endOfLifeTime - int(time.time())
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if TTL < 300:
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TTL = 300
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POW, = unpack('>Q', hashlib.sha512(hashlib.sha512(data[
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:8] + hashlib.sha512(data[8:]).digest()).digest()).digest()[0:8])
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return POW <= 2 ** 64 / (nonceTrialsPerByte*(len(data) + payloadLengthExtraBytes + ((TTL*(len(data)+payloadLengthExtraBytes))/(2 ** 16))))
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def doCleanShutdown():
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global shutdown
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shutdown = 1 #Used to tell proof of work worker threads and the objectProcessorThread to exit.
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broadcastToSendDataQueues((0, 'shutdown', 'no data'))
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with shared.objectProcessorQueueSizeLock:
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data = 'no data'
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shared.objectProcessorQueueSize += len(data)
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objectProcessorQueue.put(('checkShutdownVariable',data))
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knownNodesLock.acquire()
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UISignalQueue.put(('updateStatusBar','Saving the knownNodes list of peers to disk...'))
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output = open(appdata + 'knownnodes.dat', 'wb')
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logger.info('finished opening knownnodes.dat. Now pickle.dump')
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pickle.dump(knownNodes, output)
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logger.info('Completed pickle.dump. Closing output...')
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output.close()
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knownNodesLock.release()
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logger.info('Finished closing knownnodes.dat output file.')
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UISignalQueue.put(('updateStatusBar','Done saving the knownNodes list of peers to disk.'))
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logger.info('Flushing inventory in memory out to disk...')
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UISignalQueue.put((
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'updateStatusBar',
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'Flushing inventory in memory out to disk. This should normally only take a second...'))
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flushInventory()
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import upnp
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upnp.deletePortMapping()
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# Verify that the objectProcessor has finished exiting. It should have incremented the
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# shutdown variable from 1 to 2. This must finish before we command the sqlThread to exit.
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while shutdown == 1:
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time.sleep(.1)
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# This one last useless query will guarantee that the previous flush committed and that the
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# objectProcessorThread committed before we close the program.
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sqlQuery('SELECT address FROM subscriptions')
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logger.info('Finished flushing inventory.')
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sqlStoredProcedure('exit')
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# Wait long enough to guarantee that any running proof of work worker threads will check the
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# shutdown variable and exit. If the main thread closes before they do then they won't stop.
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time.sleep(.25)
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if safeConfigGetBoolean('bitmessagesettings','daemon'):
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logger.info('Clean shutdown complete.')
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os._exit(0)
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# If you want to command all of the sendDataThreads to do something, like shutdown or send some data, this
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# function puts your data into the queues for each of the sendDataThreads. The sendDataThreads are
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# responsible for putting their queue into (and out of) the sendDataQueues list.
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def broadcastToSendDataQueues(data):
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# logger.debug('running broadcastToSendDataQueues')
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for q in sendDataQueues:
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q.put(data)
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def flushInventory():
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#Note that the singleCleanerThread clears out the inventory dictionary from time to time, although it only clears things that have been in the dictionary for a long time. This clears the inventory dictionary Now.
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with SqlBulkExecute() as sql:
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for hash, storedValue in inventory.items():
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objectType, streamNumber, payload, expiresTime, tag = storedValue
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sql.execute('''INSERT INTO inventory VALUES (?,?,?,?,?,?)''',
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hash,objectType,streamNumber,payload,expiresTime,tag)
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del inventory[hash]
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def fixPotentiallyInvalidUTF8Data(text):
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try:
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unicode(text,'utf-8')
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return text
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except:
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output = 'Part of the message is corrupt. The message cannot be displayed the normal way.\n\n' + repr(text)
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return output
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# Checks sensitive file permissions for inappropriate umask during keys.dat creation.
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# (Or unwise subsequent chmod.)
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#
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# Returns true iff file appears to have appropriate permissions.
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def checkSensitiveFilePermissions(filename):
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if sys.platform == 'win32':
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# TODO: This might deserve extra checks by someone familiar with
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# Windows systems.
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return True
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elif sys.platform[:7] == 'freebsd':
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# FreeBSD file systems are the same as major Linux file systems
|
|
present_permissions = os.stat(filename)[0]
|
|
disallowed_permissions = stat.S_IRWXG | stat.S_IRWXO
|
|
return present_permissions & disallowed_permissions == 0
|
|
else:
|
|
try:
|
|
# Skip known problems for non-Win32 filesystems without POSIX permissions.
|
|
import subprocess
|
|
fstype = subprocess.check_output('stat -f -c "%%T" %s' % (filename),
|
|
shell=True,
|
|
stderr=subprocess.STDOUT)
|
|
if 'fuseblk' in fstype:
|
|
logger.info('Skipping file permissions check for %s. Filesystem fuseblk detected.',
|
|
filename)
|
|
return True
|
|
except:
|
|
# Swallow exception here, but we might run into trouble later!
|
|
logger.error('Could not determine filesystem type. %s', filename)
|
|
present_permissions = os.stat(filename)[0]
|
|
disallowed_permissions = stat.S_IRWXG | stat.S_IRWXO
|
|
return present_permissions & disallowed_permissions == 0
|
|
|
|
# Fixes permissions on a sensitive file.
|
|
def fixSensitiveFilePermissions(filename, hasEnabledKeys):
|
|
if hasEnabledKeys:
|
|
logger.warning('Keyfile had insecure permissions, and there were enabled keys. '
|
|
'The truly paranoid should stop using them immediately.')
|
|
else:
|
|
logger.warning('Keyfile had insecure permissions, but there were no enabled keys.')
|
|
try:
|
|
present_permissions = os.stat(filename)[0]
|
|
disallowed_permissions = stat.S_IRWXG | stat.S_IRWXO
|
|
allowed_permissions = ((1<<32)-1) ^ disallowed_permissions
|
|
new_permissions = (
|
|
allowed_permissions & present_permissions)
|
|
os.chmod(filename, new_permissions)
|
|
|
|
logger.info('Keyfile permissions automatically fixed.')
|
|
|
|
except Exception, e:
|
|
logger.exception('Keyfile permissions could not be fixed.')
|
|
raise
|
|
|
|
def isBitSetWithinBitfield(fourByteString, n):
|
|
# Uses MSB 0 bit numbering across 4 bytes of data
|
|
n = 31 - n
|
|
x, = unpack('>L', fourByteString)
|
|
return x & 2**n != 0
|
|
|
|
|
|
def decryptAndCheckPubkeyPayload(data, address):
|
|
"""
|
|
Version 4 pubkeys are encrypted. This function is run when we already have the
|
|
address to which we want to try to send a message. The 'data' may come either
|
|
off of the wire or we might have had it already in our inventory when we tried
|
|
to send a msg to this particular address.
|
|
"""
|
|
try:
|
|
status, addressVersion, streamNumber, ripe = decodeAddress(address)
|
|
|
|
readPosition = 20 # bypass the nonce, time, and object type
|
|
embeddedAddressVersion, varintLength = decodeVarint(data[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
embeddedStreamNumber, varintLength = decodeVarint(data[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
storedData = data[20:readPosition] # We'll store the address version and stream number (and some more) in the pubkeys table.
|
|
|
|
if addressVersion != embeddedAddressVersion:
|
|
logger.info('Pubkey decryption was UNsuccessful due to address version mismatch.')
|
|
return 'failed'
|
|
if streamNumber != embeddedStreamNumber:
|
|
logger.info('Pubkey decryption was UNsuccessful due to stream number mismatch.')
|
|
return 'failed'
|
|
|
|
tag = data[readPosition:readPosition + 32]
|
|
readPosition += 32
|
|
signedData = data[8:readPosition] # the time through the tag. More data is appended onto signedData below after the decryption.
|
|
encryptedData = data[readPosition:]
|
|
|
|
# Let us try to decrypt the pubkey
|
|
toAddress, cryptorObject = shared.neededPubkeys[tag]
|
|
if toAddress != address:
|
|
logger.critical('decryptAndCheckPubkeyPayload failed due to toAddress mismatch. This is very peculiar. toAddress: %s, address %s' % (toAddress, address))
|
|
# the only way I can think that this could happen is if someone encodes their address data two different ways.
|
|
# That sort of address-malleability should have been caught by the UI or API and an error given to the user.
|
|
return 'failed'
|
|
try:
|
|
decryptedData = cryptorObject.decrypt(encryptedData)
|
|
except:
|
|
# Someone must have encrypted some data with a different key
|
|
# but tagged it with a tag for which we are watching.
|
|
logger.info('Pubkey decryption was unsuccessful.')
|
|
return 'failed'
|
|
|
|
readPosition = 0
|
|
bitfieldBehaviors = decryptedData[readPosition:readPosition + 4]
|
|
readPosition += 4
|
|
publicSigningKey = '\x04' + decryptedData[readPosition:readPosition + 64]
|
|
readPosition += 64
|
|
publicEncryptionKey = '\x04' + decryptedData[readPosition:readPosition + 64]
|
|
readPosition += 64
|
|
specifiedNonceTrialsPerByte, specifiedNonceTrialsPerByteLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += specifiedNonceTrialsPerByteLength
|
|
specifiedPayloadLengthExtraBytes, specifiedPayloadLengthExtraBytesLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += specifiedPayloadLengthExtraBytesLength
|
|
storedData += decryptedData[:readPosition]
|
|
signedData += decryptedData[:readPosition]
|
|
signatureLength, signatureLengthLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += signatureLengthLength
|
|
signature = decryptedData[readPosition:readPosition + signatureLength]
|
|
|
|
if highlevelcrypto.verify(signedData, signature, publicSigningKey.encode('hex')):
|
|
logger.info('ECDSA verify passed (within decryptAndCheckPubkeyPayload)')
|
|
else:
|
|
logger.info('ECDSA verify failed (within decryptAndCheckPubkeyPayload)')
|
|
return 'failed'
|
|
|
|
sha = hashlib.new('sha512')
|
|
sha.update(publicSigningKey + publicEncryptionKey)
|
|
ripeHasher = hashlib.new('ripemd160')
|
|
ripeHasher.update(sha.digest())
|
|
embeddedRipe = ripeHasher.digest()
|
|
|
|
if embeddedRipe != ripe:
|
|
# Although this pubkey object had the tag were were looking for and was
|
|
# encrypted with the correct encryption key, it doesn't contain the
|
|
# correct pubkeys. Someone is either being malicious or using buggy software.
|
|
logger.info('Pubkey decryption was UNsuccessful due to RIPE mismatch.')
|
|
return 'failed'
|
|
|
|
# Everything checked out. Insert it into the pubkeys table.
|
|
|
|
logger.info('within decryptAndCheckPubkeyPayload, addressVersion: %s, streamNumber: %s \n\
|
|
ripe %s\n\
|
|
publicSigningKey in hex: %s\n\
|
|
publicEncryptionKey in hex: %s' % (addressVersion,
|
|
streamNumber,
|
|
ripe.encode('hex'),
|
|
publicSigningKey.encode('hex'),
|
|
publicEncryptionKey.encode('hex')
|
|
)
|
|
)
|
|
|
|
t = (address, addressVersion, storedData, int(time.time()), 'yes')
|
|
sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
|
|
return 'successful'
|
|
except varintDecodeError as e:
|
|
logger.info('Pubkey decryption was UNsuccessful due to a malformed varint.')
|
|
return 'failed'
|
|
except Exception as e:
|
|
logger.critical('Pubkey decryption was UNsuccessful because of an unhandled exception! This is definitely a bug! \n%s' % traceback.format_exc())
|
|
return 'failed'
|
|
|
|
Peer = collections.namedtuple('Peer', ['host', 'port'])
|
|
|
|
def checkAndShareObjectWithPeers(data):
|
|
"""
|
|
This function is called after either receiving an object off of the wire
|
|
or after receiving one as ackdata.
|
|
Returns the length of time that we should reserve to process this message
|
|
if we are receiving it off of the wire.
|
|
"""
|
|
if len(data) > 2 ** 18:
|
|
logger.info('The payload length of this object is too large (%s bytes). Ignoring it.' % len(data))
|
|
return 0
|
|
# Let us check to make sure that the proof of work is sufficient.
|
|
if not isProofOfWorkSufficient(data):
|
|
logger.info('Proof of work is insufficient.')
|
|
return 0
|
|
|
|
endOfLifeTime, = unpack('>Q', data[8:16])
|
|
if endOfLifeTime - int(time.time()) > 28 * 24 * 60 * 60 + 10800: # The TTL may not be larger than 28 days + 3 hours of wiggle room
|
|
logger.info('This object\'s End of Life time is too far in the future. Ignoring it. Time is %s' % endOfLifeTime)
|
|
return 0
|
|
if endOfLifeTime - int(time.time()) < - 3600: # The EOL time was more than an hour ago. That's too much.
|
|
logger.info('This object\'s End of Life time was more than an hour ago. Ignoring the object. Time is %s' % endOfLifeTime)
|
|
return 0
|
|
intObjectType, = unpack('>I', data[16:20])
|
|
try:
|
|
if intObjectType == 0:
|
|
_checkAndShareGetpubkeyWithPeers(data)
|
|
return 0.1
|
|
elif intObjectType == 1:
|
|
_checkAndSharePubkeyWithPeers(data)
|
|
return 0.1
|
|
elif intObjectType == 2:
|
|
_checkAndShareMsgWithPeers(data)
|
|
return 0.6
|
|
elif intObjectType == 3:
|
|
_checkAndShareBroadcastWithPeers(data)
|
|
return 0.6
|
|
else:
|
|
_checkAndShareUndefinedObjectWithPeers(data)
|
|
return 0.6
|
|
except varintDecodeError as e:
|
|
logger.debug("There was a problem with a varint while checking to see whether it was appropriate to share an object with peers. Some details: %s" % e)
|
|
except Exception as e:
|
|
logger.critical('There was a problem while checking to see whether it was appropriate to share an object with peers. This is definitely a bug! \n%s' % traceback.format_exc())
|
|
return 0
|
|
|
|
|
|
def _checkAndShareUndefinedObjectWithPeers(data):
|
|
embeddedTime, = unpack('>Q', data[8:16])
|
|
readPosition = 20 # bypass nonce, time, and object type
|
|
objectVersion, objectVersionLength = decodeVarint(
|
|
data[readPosition:readPosition + 9])
|
|
readPosition += objectVersionLength
|
|
streamNumber, streamNumberLength = decodeVarint(
|
|
data[readPosition:readPosition + 9])
|
|
if not streamNumber in streamsInWhichIAmParticipating:
|
|
logger.debug('The streamNumber %s isn\'t one we are interested in.' % streamNumber)
|
|
return
|
|
|
|
inventoryHash = calculateInventoryHash(data)
|
|
shared.numberOfInventoryLookupsPerformed += 1
|
|
inventoryLock.acquire()
|
|
if inventoryHash in inventory:
|
|
logger.debug('We have already received this undefined object. Ignoring.')
|
|
inventoryLock.release()
|
|
return
|
|
elif isInSqlInventory(inventoryHash):
|
|
logger.debug('We have already received this undefined object (it is stored on disk in the SQL inventory). Ignoring it.')
|
|
inventoryLock.release()
|
|
return
|
|
objectType, = unpack('>I', data[16:20])
|
|
inventory[inventoryHash] = (
|
|
objectType, streamNumber, data, embeddedTime,'')
|
|
inventorySets[streamNumber].add(inventoryHash)
|
|
inventoryLock.release()
|
|
logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
|
|
broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
|
|
|
|
|
|
def _checkAndShareMsgWithPeers(data):
|
|
embeddedTime, = unpack('>Q', data[8:16])
|
|
readPosition = 20 # bypass nonce, time, and object type
|
|
objectVersion, objectVersionLength = decodeVarint(
|
|
data[readPosition:readPosition + 9])
|
|
readPosition += objectVersionLength
|
|
streamNumber, streamNumberLength = decodeVarint(
|
|
data[readPosition:readPosition + 9])
|
|
if not streamNumber in streamsInWhichIAmParticipating:
|
|
logger.debug('The streamNumber %s isn\'t one we are interested in.' % streamNumber)
|
|
return
|
|
readPosition += streamNumberLength
|
|
inventoryHash = calculateInventoryHash(data)
|
|
shared.numberOfInventoryLookupsPerformed += 1
|
|
inventoryLock.acquire()
|
|
if inventoryHash in inventory:
|
|
logger.debug('We have already received this msg message. Ignoring.')
|
|
inventoryLock.release()
|
|
return
|
|
elif isInSqlInventory(inventoryHash):
|
|
logger.debug('We have already received this msg message (it is stored on disk in the SQL inventory). Ignoring it.')
|
|
inventoryLock.release()
|
|
return
|
|
# This msg message is valid. Let's let our peers know about it.
|
|
objectType = 2
|
|
inventory[inventoryHash] = (
|
|
objectType, streamNumber, data, embeddedTime,'')
|
|
inventorySets[streamNumber].add(inventoryHash)
|
|
inventoryLock.release()
|
|
logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
|
|
broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
|
|
|
|
# Now let's enqueue it to be processed ourselves.
|
|
# If we already have too much data in the queue to be processed, just sleep for now.
|
|
while shared.objectProcessorQueueSize > 120000000:
|
|
time.sleep(2)
|
|
with shared.objectProcessorQueueSizeLock:
|
|
shared.objectProcessorQueueSize += len(data)
|
|
objectProcessorQueue.put((objectType,data))
|
|
|
|
def _checkAndShareGetpubkeyWithPeers(data):
|
|
if len(data) < 42:
|
|
logger.info('getpubkey message doesn\'t contain enough data. Ignoring.')
|
|
return
|
|
if len(data) > 200:
|
|
logger.info('getpubkey is abnormally long. Sanity check failed. Ignoring object.')
|
|
embeddedTime, = unpack('>Q', data[8:16])
|
|
readPosition = 20 # bypass the nonce, time, and object type
|
|
requestedAddressVersionNumber, addressVersionLength = decodeVarint(
|
|
data[readPosition:readPosition + 10])
|
|
readPosition += addressVersionLength
|
|
streamNumber, streamNumberLength = decodeVarint(
|
|
data[readPosition:readPosition + 10])
|
|
if not streamNumber in streamsInWhichIAmParticipating:
|
|
logger.debug('The streamNumber %s isn\'t one we are interested in.' % streamNumber)
|
|
return
|
|
readPosition += streamNumberLength
|
|
|
|
shared.numberOfInventoryLookupsPerformed += 1
|
|
inventoryHash = calculateInventoryHash(data)
|
|
inventoryLock.acquire()
|
|
if inventoryHash in inventory:
|
|
logger.debug('We have already received this getpubkey request. Ignoring it.')
|
|
inventoryLock.release()
|
|
return
|
|
elif isInSqlInventory(inventoryHash):
|
|
logger.debug('We have already received this getpubkey request (it is stored on disk in the SQL inventory). Ignoring it.')
|
|
inventoryLock.release()
|
|
return
|
|
|
|
objectType = 0
|
|
inventory[inventoryHash] = (
|
|
objectType, streamNumber, data, embeddedTime,'')
|
|
inventorySets[streamNumber].add(inventoryHash)
|
|
inventoryLock.release()
|
|
# This getpubkey request is valid. Forward to peers.
|
|
logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
|
|
broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
|
|
|
|
# Now let's queue it to be processed ourselves.
|
|
# If we already have too much data in the queue to be processed, just sleep for now.
|
|
while shared.objectProcessorQueueSize > 120000000:
|
|
time.sleep(2)
|
|
with shared.objectProcessorQueueSizeLock:
|
|
shared.objectProcessorQueueSize += len(data)
|
|
objectProcessorQueue.put((objectType,data))
|
|
|
|
def _checkAndSharePubkeyWithPeers(data):
|
|
if len(data) < 146 or len(data) > 440: # sanity check
|
|
return
|
|
embeddedTime, = unpack('>Q', data[8:16])
|
|
readPosition = 20 # bypass the nonce, time, and object type
|
|
addressVersion, varintLength = decodeVarint(
|
|
data[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
streamNumber, varintLength = decodeVarint(
|
|
data[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
if not streamNumber in streamsInWhichIAmParticipating:
|
|
logger.debug('The streamNumber %s isn\'t one we are interested in.' % streamNumber)
|
|
return
|
|
if addressVersion >= 4:
|
|
tag = data[readPosition:readPosition + 32]
|
|
logger.debug('tag in received pubkey is: %s' % tag.encode('hex'))
|
|
else:
|
|
tag = ''
|
|
|
|
shared.numberOfInventoryLookupsPerformed += 1
|
|
inventoryHash = calculateInventoryHash(data)
|
|
inventoryLock.acquire()
|
|
if inventoryHash in inventory:
|
|
logger.debug('We have already received this pubkey. Ignoring it.')
|
|
inventoryLock.release()
|
|
return
|
|
elif isInSqlInventory(inventoryHash):
|
|
logger.debug('We have already received this pubkey (it is stored on disk in the SQL inventory). Ignoring it.')
|
|
inventoryLock.release()
|
|
return
|
|
objectType = 1
|
|
inventory[inventoryHash] = (
|
|
objectType, streamNumber, data, embeddedTime, tag)
|
|
inventorySets[streamNumber].add(inventoryHash)
|
|
inventoryLock.release()
|
|
# This object is valid. Forward it to peers.
|
|
logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
|
|
broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
|
|
|
|
|
|
# Now let's queue it to be processed ourselves.
|
|
# If we already have too much data in the queue to be processed, just sleep for now.
|
|
while shared.objectProcessorQueueSize > 120000000:
|
|
time.sleep(2)
|
|
with shared.objectProcessorQueueSizeLock:
|
|
shared.objectProcessorQueueSize += len(data)
|
|
objectProcessorQueue.put((objectType,data))
|
|
|
|
|
|
def _checkAndShareBroadcastWithPeers(data):
|
|
if len(data) < 180:
|
|
logger.debug('The payload length of this broadcast packet is unreasonably low. Someone is probably trying funny business. Ignoring message.')
|
|
return
|
|
embeddedTime, = unpack('>Q', data[8:16])
|
|
readPosition = 20 # bypass the nonce, time, and object type
|
|
broadcastVersion, broadcastVersionLength = decodeVarint(
|
|
data[readPosition:readPosition + 10])
|
|
readPosition += broadcastVersionLength
|
|
if broadcastVersion >= 2:
|
|
streamNumber, streamNumberLength = decodeVarint(data[readPosition:readPosition + 10])
|
|
readPosition += streamNumberLength
|
|
if not streamNumber in streamsInWhichIAmParticipating:
|
|
logger.debug('The streamNumber %s isn\'t one we are interested in.' % streamNumber)
|
|
return
|
|
if broadcastVersion >= 3:
|
|
tag = data[readPosition:readPosition+32]
|
|
else:
|
|
tag = ''
|
|
shared.numberOfInventoryLookupsPerformed += 1
|
|
inventoryLock.acquire()
|
|
inventoryHash = calculateInventoryHash(data)
|
|
if inventoryHash in inventory:
|
|
logger.debug('We have already received this broadcast object. Ignoring.')
|
|
inventoryLock.release()
|
|
return
|
|
elif isInSqlInventory(inventoryHash):
|
|
logger.debug('We have already received this broadcast object (it is stored on disk in the SQL inventory). Ignoring it.')
|
|
inventoryLock.release()
|
|
return
|
|
# It is valid. Let's let our peers know about it.
|
|
objectType = 3
|
|
inventory[inventoryHash] = (
|
|
objectType, streamNumber, data, embeddedTime, tag)
|
|
inventorySets[streamNumber].add(inventoryHash)
|
|
inventoryLock.release()
|
|
# This object is valid. Forward it to peers.
|
|
logger.debug('advertising inv with hash: %s' % inventoryHash.encode('hex'))
|
|
broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
|
|
|
|
# Now let's queue it to be processed ourselves.
|
|
# If we already have too much data in the queue to be processed, just sleep for now.
|
|
while shared.objectProcessorQueueSize > 120000000:
|
|
time.sleep(2)
|
|
with shared.objectProcessorQueueSizeLock:
|
|
shared.objectProcessorQueueSize += len(data)
|
|
objectProcessorQueue.put((objectType,data))
|
|
|
|
def openKeysFile():
|
|
if 'linux' in sys.platform:
|
|
subprocess.call(["xdg-open", shared.appdata + 'keys.dat'])
|
|
else:
|
|
os.startfile(shared.appdata + 'keys.dat')
|
|
|
|
def writeKeysFile():
|
|
fileName = shared.appdata + 'keys.dat'
|
|
fileNameBak = fileName + "." + datetime.datetime.now().strftime("%Y%j%H%M%S%f") + '.bak'
|
|
# create a backup copy to prevent the accidental loss due to the disk write failure
|
|
try:
|
|
shutil.copyfile(fileName, fileNameBak)
|
|
# The backup succeeded.
|
|
fileNameExisted = True
|
|
except:
|
|
# The backup failed. This can happen if the file didn't exist before.
|
|
fileNameExisted = False
|
|
# write the file
|
|
with open(fileName, 'wb') as configfile:
|
|
shared.config.write(configfile)
|
|
# delete the backup
|
|
if fileNameExisted:
|
|
os.remove(fileNameBak)
|
|
|
|
from debug import logger
|