1231 lines
66 KiB
Python
1231 lines
66 KiB
Python
import time
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import threading
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import shared
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import hashlib
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import random
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from struct import unpack, pack
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import sys
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import string
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from subprocess import call # used when the API must execute an outside program
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from pyelliptic.openssl import OpenSSL
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import highlevelcrypto
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from addresses import *
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import helper_generic
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from helper_generic import addDataPadding
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import helper_bitcoin
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import helper_inbox
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import helper_sent
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from helper_sql import *
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import tr
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from debug import logger
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import l10n
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class objectProcessor(threading.Thread):
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"""
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The objectProcessor thread, of which there is only one, receives network
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objecs (msg, broadcast, pubkey, getpubkey) from the receiveDataThreads.
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"""
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def __init__(self):
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threading.Thread.__init__(self)
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"""
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It may be the case that the last time Bitmessage was running, the user
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closed it before it finished processing everything in the
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objectProcessorQueue. Assuming that Bitmessage wasn't closed forcefully,
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it should have saved the data in the queue into the objectprocessorqueue
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table. Let's pull it out.
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"""
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queryreturn = sqlQuery(
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'''SELECT objecttype, data FROM objectprocessorqueue''')
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with shared.objectProcessorQueueSizeLock:
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for row in queryreturn:
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objectType, data = row
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shared.objectProcessorQueueSize += len(data)
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shared.objectProcessorQueue.put((objectType,data))
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sqlExecute('''DELETE FROM objectprocessorqueue''')
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logger.debug('Loaded %s objects from disk into the objectProcessorQueue.' % str(len(queryreturn)))
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def run(self):
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while True:
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objectType, data = shared.objectProcessorQueue.get()
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if objectType == 'getpubkey':
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self.processgetpubkey(data)
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elif objectType == 'pubkey':
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self.processpubkey(data)
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elif objectType == 'msg':
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self.processmsg(data)
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elif objectType == 'broadcast':
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self.processbroadcast(data)
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elif objectType == 'checkShutdownVariable': # is more of a command, not an object type. Is used to get this thread past the queue.get() so that it will check the shutdown variable.
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pass
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else:
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logger.critical('Error! Bug! The class_objectProcessor was passed an object type it doesn\'t recognize: %s' % str(objectType))
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with shared.objectProcessorQueueSizeLock:
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shared.objectProcessorQueueSize -= len(data) # We maintain objectProcessorQueueSize so that we will slow down requesting objects if too much data accumulates in the queue.
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if shared.shutdown:
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time.sleep(.5) # Wait just a moment for most of the connections to close
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numberOfObjectsThatWereInTheObjectProcessorQueue = 0
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with SqlBulkExecute() as sql:
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while shared.objectProcessorQueueSize > 1:
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objectType, data = shared.objectProcessorQueue.get()
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sql.execute('''INSERT INTO objectprocessorqueue VALUES (?,?)''',
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objectType,data)
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with shared.objectProcessorQueueSizeLock:
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shared.objectProcessorQueueSize -= len(data) # We maintain objectProcessorQueueSize so that we will slow down requesting objects if too much data accumulates in the queue.
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numberOfObjectsThatWereInTheObjectProcessorQueue += 1
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logger.debug('Saved %s objects from the objectProcessorQueue to disk. objectProcessorThread exiting.' % str(numberOfObjectsThatWereInTheObjectProcessorQueue))
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shared.shutdown = 2
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break
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def processgetpubkey(self, data):
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readPosition = 8 # bypass the nonce
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embeddedTime, = unpack('>I', data[readPosition:readPosition + 4])
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# This section is used for the transition from 32 bit time to 64 bit
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# time in the protocol.
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if embeddedTime == 0:
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embeddedTime, = unpack('>Q', data[readPosition:readPosition + 8])
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readPosition += 8
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else:
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readPosition += 4
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requestedAddressVersionNumber, addressVersionLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += addressVersionLength
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streamNumber, streamNumberLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += streamNumberLength
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if requestedAddressVersionNumber == 0:
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logger.debug('The requestedAddressVersionNumber of the pubkey request is zero. That doesn\'t make any sense. Ignoring it.')
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return
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elif requestedAddressVersionNumber == 1:
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logger.debug('The requestedAddressVersionNumber of the pubkey request is 1 which isn\'t supported anymore. Ignoring it.')
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return
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elif requestedAddressVersionNumber > 4:
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logger.debug('The requestedAddressVersionNumber of the pubkey request is too high. Can\'t understand. Ignoring it.')
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return
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myAddress = ''
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if requestedAddressVersionNumber <= 3 :
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requestedHash = data[readPosition:readPosition + 20]
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if len(requestedHash) != 20:
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logger.debug('The length of the requested hash is not 20 bytes. Something is wrong. Ignoring.')
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return
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logger.info('the hash requested in this getpubkey request is: %s' % requestedHash.encode('hex'))
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if requestedHash in shared.myAddressesByHash: # if this address hash is one of mine
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myAddress = shared.myAddressesByHash[requestedHash]
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elif requestedAddressVersionNumber >= 4:
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requestedTag = data[readPosition:readPosition + 32]
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if len(requestedTag) != 32:
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logger.debug('The length of the requested tag is not 32 bytes. Something is wrong. Ignoring.')
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return
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logger.debug('the tag requested in this getpubkey request is: %s' % requestedTag.encode('hex'))
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if requestedTag in shared.myAddressesByTag:
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myAddress = shared.myAddressesByTag[requestedTag]
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if myAddress == '':
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logger.info('This getpubkey request is not for any of my keys.')
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return
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if decodeAddress(myAddress)[1] != requestedAddressVersionNumber:
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logger.warning('(Within the processgetpubkey function) Someone requested one of my pubkeys but the requestedAddressVersionNumber doesn\'t match my actual address version number. Ignoring.')
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return
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if decodeAddress(myAddress)[2] != streamNumber:
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logger.warning('(Within the processgetpubkey function) Someone requested one of my pubkeys but the stream number on which we heard this getpubkey object doesn\'t match this address\' stream number. Ignoring.')
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return
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if shared.safeConfigGetBoolean(myAddress, 'chan'):
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logger.info('Ignoring getpubkey request because it is for one of my chan addresses. The other party should already have the pubkey.')
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return
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try:
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lastPubkeySendTime = int(shared.config.get(
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myAddress, 'lastpubkeysendtime'))
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except:
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lastPubkeySendTime = 0
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if lastPubkeySendTime > time.time() - shared.lengthOfTimeToHoldOnToAllPubkeys: # If the last time we sent our pubkey was more recent than 28 days ago...
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logger.info('Found getpubkey-requested-item in my list of EC hashes BUT we already sent it recently. Ignoring request. The lastPubkeySendTime is: %s' % lastPubkeySendTime)
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return
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logger.info('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.')
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if requestedAddressVersionNumber == 2:
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shared.workerQueue.put((
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'doPOWForMyV2Pubkey', requestedHash))
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elif requestedAddressVersionNumber == 3:
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shared.workerQueue.put((
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'sendOutOrStoreMyV3Pubkey', requestedHash))
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elif requestedAddressVersionNumber == 4:
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shared.workerQueue.put((
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'sendOutOrStoreMyV4Pubkey', myAddress))
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def processpubkey(self, data):
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pubkeyProcessingStartTime = time.time()
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shared.numberOfPubkeysProcessed += 1
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shared.UISignalQueue.put((
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'updateNumberOfPubkeysProcessed', 'no data'))
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readPosition = 8 # bypass the nonce
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embeddedTime, = unpack('>I', data[readPosition:readPosition + 4])
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# This section is used for the transition from 32 bit time to 64 bit
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# time in the protocol.
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if embeddedTime == 0:
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embeddedTime, = unpack('>Q', data[readPosition:readPosition + 8])
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readPosition += 8
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else:
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readPosition += 4
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addressVersion, varintLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += varintLength
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streamNumber, varintLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += varintLength
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if addressVersion == 0:
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logger.debug('(Within processpubkey) addressVersion of 0 doesn\'t make sense.')
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return
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if addressVersion > 4 or addressVersion == 1:
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logger.info('This version of Bitmessage cannot handle version %s addresses.' % addressVersion)
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return
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if addressVersion == 2:
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if len(data) < 146: # sanity check. This is the minimum possible length.
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logger.debug('(within processpubkey) payloadLength less than 146. Sanity check failed.')
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return
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bitfieldBehaviors = data[readPosition:readPosition + 4]
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readPosition += 4
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publicSigningKey = data[readPosition:readPosition + 64]
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# Is it possible for a public key to be invalid such that trying to
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# encrypt or sign with it will cause an error? If it is, we should
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# probably test these keys here.
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readPosition += 64
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publicEncryptionKey = data[readPosition:readPosition + 64]
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if len(publicEncryptionKey) < 64:
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logger.debug('publicEncryptionKey length less than 64. Sanity check failed.')
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return
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sha = hashlib.new('sha512')
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sha.update(
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'\x04' + publicSigningKey + '\x04' + publicEncryptionKey)
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ripeHasher = hashlib.new('ripemd160')
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ripeHasher.update(sha.digest())
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ripe = ripeHasher.digest()
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logger.info('within recpubkey, addressVersion: %s, streamNumber: %s \n\
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ripe %s\n\
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publicSigningKey in hex: %s\n\
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publicEncryptionKey in hex: %s' % (addressVersion,
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streamNumber,
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ripe.encode('hex'),
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publicSigningKey.encode('hex'),
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publicEncryptionKey.encode('hex')
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)
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)
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queryreturn = sqlQuery(
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'''SELECT usedpersonally FROM pubkeys WHERE hash=? AND addressversion=? AND usedpersonally='yes' ''', ripe, addressVersion)
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if queryreturn != []: # if this pubkey is already in our database and if we have used it personally:
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logger.info('We HAVE used this pubkey personally. Updating time.')
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t = (ripe, addressVersion, data, embeddedTime, 'yes')
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else:
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logger.info('We have NOT used this pubkey personally. Inserting in database.')
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t = (ripe, addressVersion, data, embeddedTime, 'no')
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# This will also update the embeddedTime.
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sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
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# shared.workerQueue.put(('newpubkey',(addressVersion,streamNumber,ripe)))
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self.possibleNewPubkey(ripe = ripe)
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if addressVersion == 3:
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if len(data) < 170: # sanity check.
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logger.warning('(within processpubkey) payloadLength less than 170. Sanity check failed.')
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return
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bitfieldBehaviors = data[readPosition:readPosition + 4]
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readPosition += 4
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publicSigningKey = '\x04' + data[readPosition:readPosition + 64]
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# Is it possible for a public key to be invalid such that trying to
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# encrypt or sign with it will cause an error? If it is, we should
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# probably test these keys here.
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readPosition += 64
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publicEncryptionKey = '\x04' + data[readPosition:readPosition + 64]
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readPosition += 64
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specifiedNonceTrialsPerByte, specifiedNonceTrialsPerByteLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += specifiedNonceTrialsPerByteLength
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specifiedPayloadLengthExtraBytes, specifiedPayloadLengthExtraBytesLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += specifiedPayloadLengthExtraBytesLength
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endOfSignedDataPosition = readPosition
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signatureLength, signatureLengthLength = decodeVarint(
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data[readPosition:readPosition + 10])
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readPosition += signatureLengthLength
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signature = data[readPosition:readPosition + signatureLength]
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try:
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if not highlevelcrypto.verify(data[8:endOfSignedDataPosition], signature, publicSigningKey.encode('hex')):
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logger.warning('ECDSA verify failed (within processpubkey)')
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return
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logger.info('ECDSA verify passed (within processpubkey)')
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except Exception as err:
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logger.warning('ECDSA verify failed (within processpubkey) %s' % err)
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return
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sha = hashlib.new('sha512')
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sha.update(publicSigningKey + publicEncryptionKey)
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ripeHasher = hashlib.new('ripemd160')
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ripeHasher.update(sha.digest())
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ripe = ripeHasher.digest()
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logger.info('within recpubkey, addressVersion: %s, streamNumber: %s \n\
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ripe %s\n\
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publicSigningKey in hex: %s\n\
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publicEncryptionKey in hex: %s' % (addressVersion,
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streamNumber,
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ripe.encode('hex'),
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publicSigningKey.encode('hex'),
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publicEncryptionKey.encode('hex')
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)
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)
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queryreturn = sqlQuery('''SELECT usedpersonally FROM pubkeys WHERE hash=? AND addressversion=? AND usedpersonally='yes' ''', ripe, addressVersion)
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if queryreturn != []: # if this pubkey is already in our database and if we have used it personally:
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logger.info('We HAVE used this pubkey personally. Updating time.')
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t = (ripe, addressVersion, data, embeddedTime, 'yes')
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else:
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logger.info('We have NOT used this pubkey personally. Inserting in database.')
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t = (ripe, addressVersion, data, embeddedTime, 'no')
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# This will also update the embeddedTime.
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sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
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self.possibleNewPubkey(ripe = ripe)
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if addressVersion == 4:
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"""
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There exist a function: shared.decryptAndCheckPubkeyPayload which does something almost
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the same as this section of code. There are differences, however; one being that
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decryptAndCheckPubkeyPayload requires that a cryptor object be created each time it is
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run which is an expensive operation. This, on the other hand, keeps them saved in
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the shared.neededPubkeys dictionary so that if an attacker sends us many
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incorrectly-tagged pubkeys, which would force us to try to decrypt them, this code
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would run and handle that event quite quickly.
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"""
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if len(data) < 350: # sanity check.
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logger.debug('(within processpubkey) payloadLength less than 350. Sanity check failed.')
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return
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signedData = data[8:readPosition] # Some of the signed data is not encrypted so let's keep it for now.
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tag = data[readPosition:readPosition + 32]
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readPosition += 32
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encryptedData = data[readPosition:]
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if tag not in shared.neededPubkeys:
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logger.info('We don\'t need this v4 pubkey. We didn\'t ask for it.')
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return
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# Let us try to decrypt the pubkey
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cryptorObject = shared.neededPubkeys[tag]
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try:
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decryptedData = cryptorObject.decrypt(encryptedData)
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except:
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# Someone must have encrypted some data with a different key
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# but tagged it with a tag for which we are watching.
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logger.info('Pubkey decryption was unsuccessful.')
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return
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readPosition = 0
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bitfieldBehaviors = decryptedData[readPosition:readPosition + 4]
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readPosition += 4
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publicSigningKey = '\x04' + decryptedData[readPosition:readPosition + 64]
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# Is it possible for a public key to be invalid such that trying to
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# encrypt or check a sig with it will cause an error? If it is, we
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# should probably test these keys here.
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readPosition += 64
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publicEncryptionKey = '\x04' + decryptedData[readPosition:readPosition + 64]
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readPosition += 64
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specifiedNonceTrialsPerByte, specifiedNonceTrialsPerByteLength = decodeVarint(
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decryptedData[readPosition:readPosition + 10])
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readPosition += specifiedNonceTrialsPerByteLength
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specifiedPayloadLengthExtraBytes, specifiedPayloadLengthExtraBytesLength = decodeVarint(
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decryptedData[readPosition:readPosition + 10])
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readPosition += specifiedPayloadLengthExtraBytesLength
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signedData += decryptedData[:readPosition]
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signatureLength, signatureLengthLength = decodeVarint(
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decryptedData[readPosition:readPosition + 10])
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readPosition += signatureLengthLength
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signature = decryptedData[readPosition:readPosition + signatureLength]
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try:
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if not highlevelcrypto.verify(signedData, signature, publicSigningKey.encode('hex')):
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logger.info('ECDSA verify failed (within processpubkey)')
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return
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logger.info('ECDSA verify passed (within processpubkey)')
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except Exception as err:
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logger.info('ECDSA verify failed (within processpubkey) %s' % err)
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return
|
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sha = hashlib.new('sha512')
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sha.update(publicSigningKey + publicEncryptionKey)
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ripeHasher = hashlib.new('ripemd160')
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ripeHasher.update(sha.digest())
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ripe = ripeHasher.digest()
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# We need to make sure that the tag on the outside of the encryption
|
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# is the one generated from hashing these particular keys.
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if tag != hashlib.sha512(hashlib.sha512(encodeVarint(addressVersion) + encodeVarint(streamNumber) + ripe).digest()).digest()[32:]:
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logger.info('Someone was trying to act malicious: tag doesn\'t match the keys in this pubkey message. Ignoring it.')
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return
|
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|
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logger.info('within recpubkey, addressVersion: %s, streamNumber: %s \n\
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ripe %s\n\
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publicSigningKey in hex: %s\n\
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publicEncryptionKey in hex: %s' % (addressVersion,
|
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streamNumber,
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ripe.encode('hex'),
|
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publicSigningKey.encode('hex'),
|
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publicEncryptionKey.encode('hex')
|
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)
|
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)
|
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|
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t = (ripe, addressVersion, signedData, embeddedTime, 'yes')
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sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
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|
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fromAddress = encodeAddress(addressVersion, streamNumber, ripe)
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# That this point we know that we have been waiting on this pubkey.
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# This function will command the workerThread to start work on
|
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# the messages that require it.
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self.possibleNewPubkey(address = fromAddress)
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|
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# Display timing data
|
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timeRequiredToProcessPubkey = time.time(
|
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) - pubkeyProcessingStartTime
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logger.debug('Time required to process this pubkey: %s' % timeRequiredToProcessPubkey)
|
|
|
|
|
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def processmsg(self, data):
|
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messageProcessingStartTime = time.time()
|
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shared.numberOfMessagesProcessed += 1
|
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shared.UISignalQueue.put((
|
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'updateNumberOfMessagesProcessed', 'no data'))
|
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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])
|
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readPosition += 8
|
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else:
|
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readPosition += 4
|
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streamNumberAsClaimedByMsg, streamNumberAsClaimedByMsgLength = decodeVarint(
|
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data[readPosition:readPosition + 9])
|
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readPosition += streamNumberAsClaimedByMsgLength
|
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inventoryHash = calculateInventoryHash(data)
|
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initialDecryptionSuccessful = False
|
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# Let's check whether this is a message acknowledgement bound for us.
|
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if data[readPosition:] in shared.ackdataForWhichImWatching:
|
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logger.info('This msg IS an acknowledgement bound for me.')
|
|
del shared.ackdataForWhichImWatching[data[readPosition:]]
|
|
sqlExecute('UPDATE sent SET status=? WHERE ackdata=?',
|
|
'ackreceived', data[readPosition:])
|
|
shared.UISignalQueue.put(('updateSentItemStatusByAckdata', (data[readPosition:], tr.translateText("MainWindow",'Acknowledgement of the message received. %1').arg(l10n.formatTimestamp()))))
|
|
return
|
|
else:
|
|
logger.info('This was NOT an acknowledgement bound for me.')
|
|
|
|
|
|
# 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(
|
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data[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
|
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logger.info('EC decryption successful using key associated with ripe hash: %s' % key.encode('hex'))
|
|
break
|
|
except Exception as err:
|
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pass
|
|
# print 'cryptorObject.decrypt Exception:', err
|
|
if not initialDecryptionSuccessful:
|
|
# This is not a message bound for me.
|
|
logger.info('Length of time program spent failing to decrypt this message: %s seconds.' % (time.time() - messageProcessingStartTime,))
|
|
return
|
|
|
|
# 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:
|
|
logger.info('Cannot understand message versions other than one. Ignoring message.')
|
|
return
|
|
sendersAddressVersionNumber, sendersAddressVersionNumberLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += sendersAddressVersionNumberLength
|
|
if sendersAddressVersionNumber == 0:
|
|
logger.info('Cannot understand sendersAddressVersionNumber = 0. Ignoring message.')
|
|
return
|
|
if sendersAddressVersionNumber > 4:
|
|
logger.info('Sender\'s address version number %s not yet supported. Ignoring message.' % sendersAddressVersionNumber)
|
|
return
|
|
if len(decryptedData) < 170:
|
|
logger.info('Length of the unencrypted data is unreasonably short. Sanity check failed. Ignoring message.')
|
|
return
|
|
sendersStreamNumber, sendersStreamNumberLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
if sendersStreamNumber == 0:
|
|
logger.info('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
|
|
logger.info('sender\'s requiredAverageProofOfWorkNonceTrialsPerByte is %s' % requiredAverageProofOfWorkNonceTrialsPerByte)
|
|
requiredPayloadLengthExtraBytes, varintLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
logger.info('sender\'s requiredPayloadLengthExtraBytes is %s' % requiredPayloadLengthExtraBytes)
|
|
endOfThePublicKeyPosition = readPosition # needed for when we store the pubkey in our database of pubkeys for later use.
|
|
if toRipe != decryptedData[readPosition:readPosition + 20]:
|
|
logger.info('The original sender of this message did not send it to you. Someone is attempting a Surreptitious Forwarding Attack.\n\
|
|
See: http://world.std.com/~dtd/sign_encrypt/sign_encrypt7.html \n\
|
|
your toRipe: %s\n\
|
|
embedded destination toRipe: %s' % (toRipe.encode('hex'), decryptedData[readPosition:readPosition + 20].encode('hex'))
|
|
)
|
|
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:
|
|
if not highlevelcrypto.verify(decryptedData[:positionOfBottomOfAckData], signature, pubSigningKey.encode('hex')):
|
|
logger.debug('ECDSA verify failed')
|
|
return
|
|
logger.debug('ECDSA verify passed')
|
|
except Exception as err:
|
|
logger.debug('ECDSA verify failed %s' % err)
|
|
return
|
|
logger.debug('As a matter of intellectual curiosity, here is the Bitcoin address associated with the keys owned by the other person: %s ..and here is the testnet address: %s. 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.' %
|
|
(helper_bitcoin.calculateBitcoinAddressFromPubkey(pubSigningKey), helper_bitcoin.calculateTestnetAddressFromPubkey(pubSigningKey))
|
|
)
|
|
|
|
# calculate the fromRipe.
|
|
sha = hashlib.new('sha512')
|
|
sha.update(pubSigningKey + pubEncryptionKey)
|
|
ripe = hashlib.new('ripemd160')
|
|
ripe.update(sha.digest())
|
|
fromAddress = encodeAddress(
|
|
sendersAddressVersionNumber, sendersStreamNumber, ripe.digest())
|
|
# Let's store the public key in case we want to reply to this
|
|
# person.
|
|
if sendersAddressVersionNumber <= 3:
|
|
sqlExecute(
|
|
'''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
|
|
ripe.digest(),
|
|
sendersAddressVersionNumber,
|
|
'\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF' + '\xFF\xFF\xFF\xFF' + decryptedData[messageVersionLength:endOfThePublicKeyPosition],
|
|
int(time.time()),
|
|
'yes')
|
|
# 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.
|
|
self.possibleNewPubkey(ripe=ripe.digest())
|
|
elif sendersAddressVersionNumber >= 4:
|
|
sqlExecute(
|
|
'''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
|
|
ripe.digest(),
|
|
sendersAddressVersionNumber,
|
|
'\x00\x00\x00\x00\x00\x00\x00\x01' + decryptedData[messageVersionLength:endOfThePublicKeyPosition],
|
|
int(time.time()),
|
|
'yes')
|
|
# 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.
|
|
self.possibleNewPubkey(address = fromAddress)
|
|
# 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 this is bound for one of my chan
|
|
# addresses then we skip this check; the minimum network POW is
|
|
# fine.
|
|
if decodeAddress(toAddress)[1] >= 3 and not shared.safeConfigGetBoolean(toAddress, 'chan'): # If the toAddress version number is 3 or higher and not one of my chan addresses:
|
|
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 shared.isProofOfWorkSufficient(data, 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
|
|
queryreturn = sqlQuery(
|
|
'''SELECT label FROM blacklist where address=? and enabled='1' ''',
|
|
fromAddress)
|
|
if queryreturn != []:
|
|
logger.info('Message ignored because address is in blacklist.')
|
|
|
|
blockMessage = True
|
|
else: # We're using a whitelist
|
|
queryreturn = sqlQuery(
|
|
'''SELECT label FROM whitelist where address=? and enabled='1' ''',
|
|
fromAddress)
|
|
if queryreturn == []:
|
|
logger.info('Message ignored because address not in whitelist.')
|
|
blockMessage = True
|
|
|
|
toLabel = shared.config.get(toAddress, 'label')
|
|
if toLabel == '':
|
|
toLabel = toAddress
|
|
|
|
if messageEncodingType == 2:
|
|
subject, body = self.decodeType2Message(message)
|
|
logger.info('Message subject (first 100 characters): %s' % repr(subject)[:100])
|
|
elif messageEncodingType == 1:
|
|
body = message
|
|
subject = ''
|
|
elif messageEncodingType == 0:
|
|
logger.info('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.')
|
|
subject = ''
|
|
body = ''
|
|
else:
|
|
body = 'Unknown encoding type.\n\n' + repr(message)
|
|
subject = ''
|
|
# Let us make sure that we haven't already received this message
|
|
if helper_inbox.isMessageAlreadyInInbox(toAddress, fromAddress, subject, body, messageEncodingType):
|
|
logger.info('This msg is already in our inbox. Ignoring it.')
|
|
blockMessage = True
|
|
if not blockMessage:
|
|
if messageEncodingType != 0:
|
|
t = (inventoryHash, toAddress, fromAddress, subject, int(
|
|
time.time()), body, 'inbox', messageEncodingType, 0)
|
|
helper_inbox.insert(t)
|
|
|
|
shared.UISignalQueue.put(('displayNewInboxMessage', (
|
|
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 = time.strftime("%a, %Y-%m-%d %H:%M:%S UTC", time.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.
|
|
ackdataForBroadcast = OpenSSL.rand(
|
|
32) # We don't actually need the ackdataForBroadcast 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 = ''
|
|
|
|
t = ('', toAddress, ripe, fromAddress, subject, message, ackdataForBroadcast, int(
|
|
time.time()), 'broadcastqueued', 1, 1, 'sent', 2)
|
|
helper_sent.insert(t)
|
|
|
|
shared.UISignalQueue.put(('displayNewSentMessage', (
|
|
toAddress, '[Broadcast subscribers]', fromAddress, subject, message, ackdataForBroadcast)))
|
|
shared.workerQueue.put(('sendbroadcast', ''))
|
|
|
|
if self.ackDataHasAVaildHeader(ackData):
|
|
if ackData[4:16] == addDataPadding('getpubkey'):
|
|
shared.checkAndSharegetpubkeyWithPeers(ackData[24:])
|
|
elif ackData[4:16] == addDataPadding('pubkey'):
|
|
shared.checkAndSharePubkeyWithPeers(ackData[24:])
|
|
elif ackData[4:16] == addDataPadding('msg'):
|
|
shared.checkAndShareMsgWithPeers(ackData[24:])
|
|
elif ackData[4:16] == addDataPadding('broadcast'):
|
|
shared.checkAndShareBroadcastWithPeers(ackData[24:])
|
|
|
|
# Display timing data
|
|
timeRequiredToAttemptToDecryptMessage = time.time(
|
|
) - messageProcessingStartTime
|
|
shared.successfullyDecryptMessageTimings.append(
|
|
timeRequiredToAttemptToDecryptMessage)
|
|
sum = 0
|
|
for item in shared.successfullyDecryptMessageTimings:
|
|
sum += item
|
|
logger.debug('Time to decrypt this message successfully: %s\n\
|
|
Average time for all message decryption successes since startup: %s.' %
|
|
(timeRequiredToAttemptToDecryptMessage, sum / len(shared.successfullyDecryptMessageTimings))
|
|
)
|
|
|
|
|
|
def processbroadcast(self, data):
|
|
messageProcessingStartTime = time.time()
|
|
shared.numberOfBroadcastsProcessed += 1
|
|
shared.UISignalQueue.put((
|
|
'updateNumberOfBroadcastsProcessed', 'no data'))
|
|
inventoryHash = calculateInventoryHash(data)
|
|
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
|
|
|
|
broadcastVersion, broadcastVersionLength = decodeVarint(
|
|
data[readPosition:readPosition + 9])
|
|
readPosition += broadcastVersionLength
|
|
if broadcastVersion < 1 or broadcastVersion > 3:
|
|
logger.debug('Cannot decode incoming broadcast versions higher than 3. Assuming the sender isn\'t 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\'t 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
|
|
logger.debug('Time spent deciding that we are not interested in this v1 broadcast: %s' % (time.time() - messageProcessingStartTime,))
|
|
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:
|
|
if not highlevelcrypto.verify(data[12:readPositionAtBottomOfMessage], signature, sendersPubSigningKey.encode('hex')):
|
|
logger.debug('ECDSA verify failed')
|
|
return
|
|
logger.debug('ECDSA verify passed')
|
|
except Exception as err:
|
|
logger.debug('ECDSA verify failed %s' % err)
|
|
return
|
|
# verify passed
|
|
fromAddress = encodeAddress(
|
|
sendersAddressVersion, sendersStream, ripe.digest())
|
|
logger.debug('fromAddress: %s' % fromAddress)
|
|
|
|
# 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.)
|
|
sqlExecute(
|
|
'''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
|
|
ripe.digest(),
|
|
sendersAddressVersion,
|
|
'\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF' + '\xFF\xFF\xFF\xFF' + data[beginningOfPubkeyPosition:endOfPubkeyPosition],
|
|
int(time.time()),
|
|
'yes')
|
|
# 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.
|
|
self.possibleNewPubkey(ripe=ripe.digest())
|
|
|
|
|
|
if messageEncodingType == 2:
|
|
subject, body = decodeType2Message(message)
|
|
logger.info('Broadcast subject (first 100 characters): %s' % repr(subject)[:100])
|
|
elif messageEncodingType == 1:
|
|
body = message
|
|
subject = ''
|
|
elif messageEncodingType == 0:
|
|
logger.debug('messageEncodingType == 0. Doing nothing with the message.')
|
|
else:
|
|
body = 'Unknown encoding type.\n\n' + repr(message)
|
|
subject = ''
|
|
|
|
toAddress = '[Broadcast subscribers]'
|
|
if messageEncodingType != 0:
|
|
# Let us make sure that we haven't already received this message
|
|
if helper_inbox.isMessageAlreadyInInbox(toAddress, fromAddress, subject, body, messageEncodingType):
|
|
logger.info('This broadcast is already in our inbox. Ignoring it.')
|
|
else:
|
|
t = (inventoryHash, toAddress, fromAddress, subject, int(
|
|
time.time()), body, 'inbox', messageEncodingType, 0)
|
|
helper_inbox.insert(t)
|
|
|
|
shared.UISignalQueue.put(('displayNewInboxMessage', (
|
|
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
|
|
logger.debug('Time spent processing this interesting broadcast: %s' % (time.time() - messageProcessingStartTime,))
|
|
|
|
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
|
|
logger.info('EC decryption successful using key associated with ripe hash: %s' % key.encode('hex'))
|
|
break
|
|
except Exception as err:
|
|
pass
|
|
# print 'cryptorObject.decrypt Exception:', err
|
|
if not initialDecryptionSuccessful:
|
|
# This is not a broadcast I am interested in.
|
|
logger.debug('Length of time program spent failing to decrypt this v2 broadcast: %s seconds.' % (time.time() - messageProcessingStartTime,))
|
|
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:
|
|
logger.info('Cannot decode senderAddressVersion other than 2 or 3. Assuming the sender isn\'t 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:
|
|
logger.info('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
|
|
logger.debug('sender\'s requiredAverageProofOfWorkNonceTrialsPerByte is %s' % requiredAverageProofOfWorkNonceTrialsPerByte)
|
|
requiredPayloadLengthExtraBytes, varintLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
logger.debug('sender\'s requiredPayloadLengthExtraBytes is %s' % requiredPayloadLengthExtraBytes)
|
|
endOfPubkeyPosition = readPosition
|
|
|
|
sha = hashlib.new('sha512')
|
|
sha.update(sendersPubSigningKey + sendersPubEncryptionKey)
|
|
ripe = hashlib.new('ripemd160')
|
|
ripe.update(sha.digest())
|
|
|
|
if toRipe != ripe.digest():
|
|
logger.info('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:
|
|
if not highlevelcrypto.verify(decryptedData[:readPositionAtBottomOfMessage], signature, sendersPubSigningKey.encode('hex')):
|
|
logger.debug('ECDSA verify failed')
|
|
return
|
|
logger.debug('ECDSA verify passed')
|
|
except Exception as err:
|
|
logger.debug('ECDSA verify failed %s' % err)
|
|
return
|
|
# verify passed
|
|
|
|
# Let's store the public key in case we want to reply to this
|
|
# person.
|
|
sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
|
|
ripe.digest(),
|
|
sendersAddressVersion,
|
|
'\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF' + '\xFF\xFF\xFF\xFF' + decryptedData[beginningOfPubkeyPosition:endOfPubkeyPosition],
|
|
int(time.time()),
|
|
'yes')
|
|
# 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.
|
|
self.possibleNewPubkey(ripe=ripe.digest())
|
|
|
|
fromAddress = encodeAddress(
|
|
sendersAddressVersion, sendersStream, ripe.digest())
|
|
with shared.printLock:
|
|
print 'fromAddress:', fromAddress
|
|
|
|
if messageEncodingType == 2:
|
|
subject, body = self.decodeType2Message(message)
|
|
logger.info('Broadcast subject (first 100 characters): %s' % repr(subject)[:100])
|
|
elif messageEncodingType == 1:
|
|
body = message
|
|
subject = ''
|
|
elif messageEncodingType == 0:
|
|
logger.info('messageEncodingType == 0. Doing nothing with the message.')
|
|
else:
|
|
body = 'Unknown encoding type.\n\n' + repr(message)
|
|
subject = ''
|
|
|
|
toAddress = '[Broadcast subscribers]'
|
|
if messageEncodingType != 0:
|
|
if helper_inbox.isMessageAlreadyInInbox(toAddress, fromAddress, subject, body, messageEncodingType):
|
|
logger.info('This broadcast is already in our inbox. Ignoring it.')
|
|
else:
|
|
t = (inventoryHash, toAddress, fromAddress, subject, int(
|
|
time.time()), body, 'inbox', messageEncodingType, 0)
|
|
helper_inbox.insert(t)
|
|
|
|
shared.UISignalQueue.put(('displayNewInboxMessage', (
|
|
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
|
|
logger.info('Time spent processing this interesting broadcast: %s' % (time.time() - messageProcessingStartTime,))
|
|
|
|
if broadcastVersion == 3:
|
|
cleartextStreamNumber, cleartextStreamNumberLength = decodeVarint(
|
|
data[readPosition:readPosition + 10])
|
|
readPosition += cleartextStreamNumberLength
|
|
embeddedTag = data[readPosition:readPosition+32]
|
|
readPosition += 32
|
|
if embeddedTag not in shared.MyECSubscriptionCryptorObjects:
|
|
logger.debug('We\'re not interested in this broadcast.')
|
|
return
|
|
# We are interested in this broadcast because of its tag.
|
|
cryptorObject = shared.MyECSubscriptionCryptorObjects[embeddedTag]
|
|
try:
|
|
decryptedData = cryptorObject.decrypt(data[readPosition:])
|
|
logger.debug('EC decryption successful')
|
|
except Exception as err:
|
|
logger.debug('Broadcast version 3 decryption Unsuccessful.')
|
|
return
|
|
|
|
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 < 4:
|
|
logger.info('Cannot decode senderAddressVersion less than 4 for broadcast version number 3. Assuming the sender isn\'t 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:
|
|
logger.info('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
|
|
logger.debug('sender\'s requiredAverageProofOfWorkNonceTrialsPerByte is %s' % requiredAverageProofOfWorkNonceTrialsPerByte)
|
|
requiredPayloadLengthExtraBytes, varintLength = decodeVarint(
|
|
decryptedData[readPosition:readPosition + 10])
|
|
readPosition += varintLength
|
|
logger.debug('sender\'s requiredPayloadLengthExtraBytes is %s' % requiredPayloadLengthExtraBytes)
|
|
endOfPubkeyPosition = readPosition
|
|
|
|
sha = hashlib.new('sha512')
|
|
sha.update(sendersPubSigningKey + sendersPubEncryptionKey)
|
|
ripeHasher = hashlib.new('ripemd160')
|
|
ripeHasher.update(sha.digest())
|
|
calculatedRipe = ripeHasher.digest()
|
|
|
|
calculatedTag = hashlib.sha512(hashlib.sha512(encodeVarint(
|
|
sendersAddressVersion) + encodeVarint(sendersStream) + calculatedRipe).digest()).digest()[32:]
|
|
if calculatedTag != embeddedTag:
|
|
logger.debug('The tag and 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:
|
|
if not highlevelcrypto.verify(decryptedData[:readPositionAtBottomOfMessage], signature, sendersPubSigningKey.encode('hex')):
|
|
logger.debug('ECDSA verify failed')
|
|
return
|
|
logger.debug('ECDSA verify passed')
|
|
except Exception as err:
|
|
logger.debug('ECDSA verify failed %s' % err)
|
|
return
|
|
# verify passed
|
|
|
|
fromAddress = encodeAddress(
|
|
sendersAddressVersion, sendersStream, calculatedRipe)
|
|
logger.info('fromAddress: %s' % fromAddress)
|
|
|
|
# Let's store the public key in case we want to reply to this person.
|
|
sqlExecute(
|
|
'''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
|
|
calculatedRipe,
|
|
sendersAddressVersion,
|
|
'\x00\x00\x00\x00\x00\x00\x00\x01' + decryptedData[beginningOfPubkeyPosition:endOfPubkeyPosition],
|
|
int(time.time()),
|
|
'yes')
|
|
# 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.
|
|
self.possibleNewPubkey(address = fromAddress)
|
|
|
|
if messageEncodingType == 2:
|
|
subject, body = self.decodeType2Message(message)
|
|
logger.info('Broadcast subject (first 100 characters): %s' % repr(subject)[:100])
|
|
elif messageEncodingType == 1:
|
|
body = message
|
|
subject = ''
|
|
elif messageEncodingType == 0:
|
|
logger.info('messageEncodingType == 0. Doing nothing with the message.')
|
|
else:
|
|
body = 'Unknown encoding type.\n\n' + repr(message)
|
|
subject = ''
|
|
|
|
toAddress = '[Broadcast subscribers]'
|
|
if messageEncodingType != 0:
|
|
if helper_inbox.isMessageAlreadyInInbox(toAddress, fromAddress, subject, body, messageEncodingType):
|
|
logger.info('This broadcast is already in our inbox. Ignoring it.')
|
|
else:
|
|
t = (inventoryHash, toAddress, fromAddress, subject, int(
|
|
time.time()), body, 'inbox', messageEncodingType, 0)
|
|
helper_inbox.insert(t)
|
|
|
|
shared.UISignalQueue.put(('displayNewInboxMessage', (
|
|
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
|
|
logger.debug('Time spent processing this interesting broadcast: %s' % (time.time() - messageProcessingStartTime,))
|
|
|
|
# We have inserted a pubkey into our pubkey table which we received from a
|
|
# pubkey, msg, or broadcast message. It might be one that we have been
|
|
# waiting for. Let's check.
|
|
def possibleNewPubkey(self, ripe=None, address=None):
|
|
# For address versions <= 3, we wait on a key with the correct ripe hash
|
|
if ripe != None:
|
|
if ripe in shared.neededPubkeys:
|
|
logger.info('We have been awaiting the arrival of this pubkey.')
|
|
del shared.neededPubkeys[ripe]
|
|
sqlExecute(
|
|
'''UPDATE sent SET status='doingmsgpow' WHERE toripe=? AND (status='awaitingpubkey' or status='doingpubkeypow') and folder='sent' ''',
|
|
ripe)
|
|
shared.workerQueue.put(('sendmessage', ''))
|
|
else:
|
|
logger.debug('We don\'t need this pub key. We didn\'t ask for it. Pubkey hash: %s' % ripe.encode('hex'))
|
|
# For address versions >= 4, we wait on a pubkey with the correct tag.
|
|
# Let us create the tag from the address and see if we were waiting
|
|
# for it.
|
|
elif address != None:
|
|
status, addressVersion, streamNumber, ripe = decodeAddress(address)
|
|
tag = hashlib.sha512(hashlib.sha512(encodeVarint(
|
|
addressVersion) + encodeVarint(streamNumber) + ripe).digest()).digest()[32:]
|
|
if tag in shared.neededPubkeys:
|
|
logger.info('We have been awaiting the arrival of this pubkey.')
|
|
del shared.neededPubkeys[tag]
|
|
sqlExecute(
|
|
'''UPDATE sent SET status='doingmsgpow' WHERE toripe=? AND (status='awaitingpubkey' or status='doingpubkeypow') and folder='sent' ''',
|
|
ripe)
|
|
shared.workerQueue.put(('sendmessage', ''))
|
|
|
|
def ackDataHasAVaildHeader(self, ackData):
|
|
if len(ackData) < shared.Header.size:
|
|
logger.info('The length of ackData is unreasonably short. Not sending ackData.')
|
|
return False
|
|
|
|
magic,command,payload_length,checksum = shared.Header.unpack(ackData[:shared.Header.size])
|
|
if magic != 0xE9BEB4D9:
|
|
logger.info('Ackdata magic bytes were wrong. Not sending ackData.')
|
|
return False
|
|
payload = ackData[shared.Header.size:]
|
|
if len(payload) != payload_length:
|
|
logger.info('ackData payload length doesn\'t match the payload length specified in the header. Not sending ackdata.')
|
|
return False
|
|
if payload_length > 180000000: # If the size of the message is greater than 180MB, ignore it.
|
|
return False
|
|
if checksum != hashlib.sha512(payload).digest()[0:4]: # test the checksum in the message.
|
|
logger.info('ackdata checksum wrong. Not sending ackdata.')
|
|
return False
|
|
if (command != addDataPadding('getpubkey') and
|
|
command != addDataPadding('pubkey') and
|
|
command != addDataPadding('msg') and
|
|
command != addDataPadding('broadcast')):
|
|
return False
|
|
return True
|
|
|
|
def decodeType2Message(self, message):
|
|
bodyPositionIndex = string.find(message, '\nBody:')
|
|
if bodyPositionIndex > 1:
|
|
subject = message[8:bodyPositionIndex]
|
|
# Only save and show the first 500 characters of the subject.
|
|
# Any more is probably an attack.
|
|
subject = subject[:500]
|
|
body = message[bodyPositionIndex + 6:]
|
|
else:
|
|
subject = ''
|
|
body = message
|
|
# Throw away any extra lines (headers) after the subject.
|
|
if subject:
|
|
subject = subject.splitlines()[0]
|
|
return subject, body
|
|
|
|
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
|
|
|
|
def decodeType2Message(self, message):
|
|
bodyPositionIndex = string.find(message, '\nBody:')
|
|
if bodyPositionIndex > 1:
|
|
subject = message[8:bodyPositionIndex]
|
|
# Only save and show the first 500 characters of the subject.
|
|
# Any more is probably an attack.
|
|
subject = subject[:500]
|
|
body = message[bodyPositionIndex + 6:]
|
|
else:
|
|
subject = ''
|
|
body = message
|
|
# Throw away any extra lines (headers) after the subject.
|
|
if subject:
|
|
subject = subject.splitlines()[0]
|
|
return subject, body
|