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Fixed POW, changed checksum, other minor changes

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This commit is contained in:
Jonathan Warren 2012-11-23 03:22:56 -05:00
parent d073e21497
commit b984f1931f
14 changed files with 141 additions and 107 deletions
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246
bitmessagemain.py
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@ -123,8 +123,6 @@ class singleListener(QThread):
while True:
#for i in range(0,1): #uncomment this line and comment the line above this to accept only one connection.
rd = receiveDataThread()
a,(HOST,PORT) = sock.accept()
while HOST in connectedHostsList:
@ -136,7 +134,6 @@ class singleListener(QThread):
print self, 'connected to', HOST,'during INCOMING request.'
rd.start()
sd = sendDataThread()
sd.setup(a,HOST,PORT,-1)
sd.start()
@ -181,13 +178,13 @@ class receiveDataThread(QThread):
break
except Exception, err:
printLock.acquire()
print 'Error receiving data. Closing receiveData thread.'
print 'sock.recv error. Closing receiveData thread.'
printLock.release()
break
#print 'Received', repr(self.data)
if self.data == "":
printLock.acquire()
print 'Socket timeout.'
print 'Connection closed.'
printLock.release()
break
else:
@ -240,7 +237,9 @@ class receiveDataThread(QThread):
knownNodes[self.streamNumber][self.HOST] = (self.PORT,int(time.time()))
remoteCommand = self.data[4:16]
if verbose >= 2:
printLock.acquire()
print 'remoteCommand ', remoteCommand, 'from', self.HOST
printLock.release()
if remoteCommand == 'version\x00\x00\x00\x00\x00':
self.recversion()
elif remoteCommand == 'verack\x00\x00\x00\x00\x00\x00':
@ -286,37 +285,23 @@ class receiveDataThread(QThread):
self.sendgetdata(objectHash)
del self.objectsThatWeHaveYetToGet[objectHash] #It is possible that the remote node doesn't respond with the object. In that case, we'll very likely get it from someone else anyway.
break
print 'within processData, length of objectsThatWeHaveYetToGet is now', len(self.objectsThatWeHaveYetToGet)
self.processData()
#if self.versionSent == 0:
# self.sendversion()
'''if (self.versionRec == 1) and (self.getaddrthreadalreadycreated == 0):
while (threading.activeCount() > maxGlobalThreads):#If there too many open threads, just wait. This includes full and half-open.
time.sleep(0.1)
printLock.acquire()
print 'Starting a new getaddrSender thread'
print 'within processData, length of objectsThatWeHaveYetToGet is now', len(self.objectsThatWeHaveYetToGet)
printLock.release()
bar = getaddrSender((self.sock,self.addr))
bar.daemon = True
self.getaddrthreadalreadycreated = 1 #we're about to start it
while True: #My goal is to try bar.start() until it succeedes
while (threading.activeCount() > maxGlobalThreads):#If there too many open threads, just wait. This includes full and half-open.
time.sleep(0.1)
try:
bar.start()
except:
maxGlobalThreads = maxGlobalThreads - 20
sys.stderr.write('Problem! Your OS did not allow the starting of another thread. Reducing the number of threads to %s and trying again.\n' % maxGlobalThreads)
continue #..the while loop again right now
break '''
self.processData()
else:
print 'Checksum incorrect. Clearing messages and waiting for new data.'
self.data = ''
print 'Checksum incorrect. Clearing this message.'
self.data = self.data[self.payloadLength+24:]
def isProofOfWorkSufficient(self):
POW, = unpack('>Q',hashlib.sha512(hashlib.sha512(self.data[24:32]+ hashlib.sha512(self.data[32:24+self.payloadLength]).digest()).digest()).digest()[0:8])
print 'POW:', POW
#Notice that I have divided the averageProofOfWorkNonceTrialsPerByte by two. This makes the POW requirement easier. This gives us wiggle-room: if we decide that we want to make the POW easier, the change won't obsolete old clients because they already expect a lower POW. If we decide that the current work done by clients feels approperate then we can remove this division by 2 and make the requirement match what is actually done by a sending node. If we want to raise the POW requirement then old nodes will HAVE to upgrade no matter what.
return POW < 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * (averageProofOfWorkNonceTrialsPerByte/2))
def sendpong(self):
print 'Sending pong'
self.sock.sendall('\xE9\xBE\xB4\xD9\x70\x6F\x6E\x67\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x82\x6D\xf0\x68')
self.sock.sendall('\xE9\xBE\xB4\xD9\x70\x6F\x6E\x67\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xcf\x83\xe1\x35')
def recverack(self):
print 'verack received'
@ -334,11 +319,13 @@ class receiveDataThread(QThread):
connectionsCount[self.streamNumber] += 1
self.emit(SIGNAL("updateNetworkStatusTab(PyQt_PyObject,PyQt_PyObject)"),self.streamNumber,connectionsCount[self.streamNumber])
connectionsCountLock.release()
self.sendaddr()
remoteNodeIncomingPort, remoteNodeSeenTime = knownNodes[self.streamNumber][self.HOST]
print 'within connectionFullyEstablished, self.HOST and remoteNodeIncomingPort:', self.HOST, remoteNodeIncomingPort
printLock.acquire()
print 'Connection fully established with', self.HOST, remoteNodeIncomingPort
print 'broadcasting addr from within connectionFullyEstablished function.'
self.broadcastaddr([(int(time.time()), self.streamNumber, 1, self.HOST, remoteNodeIncomingPort)])
printLock.release()
self.broadcastaddr([(int(time.time()), self.streamNumber, 1, self.HOST, remoteNodeIncomingPort)]) #This lets all of our peers know about this new node.
self.sendaddr() #This is one addr message to this one peer.
if connectionsCount[self.streamNumber] > 150:
print 'We are connected to too many people. Closing connection.'
self.sock.close()
@ -374,27 +361,31 @@ class receiveDataThread(QThread):
payload += hash
numberOfObjectsInInvMessage += 1
if numberOfObjectsInInvMessage >= 50000: #We can only send a max of 50000 items per inv message but we may have more objects to advertise. They must be split up into multiple inv messages.
sendinvMessageToJustThisOnePeer(numberOfObjectsInInvMessage,payload,)
sendinvMessageToJustThisOnePeer(numberOfObjectsInInvMessage,payload)
payload = ''
numberOfObjectsInInvMessage = 0
if numberOfObjectsInInvMessage > 0:
self.sendinvMessageToJustThisOnePeer(numberOfObjectsInInvMessage,payload,)
self.sendinvMessageToJustThisOnePeer(numberOfObjectsInInvMessage,payload)
#Notice that there is also a broadcastinv function for broadcasting invs to everyone in our stream.
def sendinvMessageToJustThisOnePeer(self,numberOfObjects,payload,destination):
#Self explanatory. Notice that there is also a broadcastinv function for broadcasting invs to everyone in our stream.
def sendinvMessageToJustThisOnePeer(self,numberOfObjects,payload):
payload = encodeVarint(numberOfObjects) + payload
headerData = '\xe9\xbe\xb4\xd9' #magic bits, slighly different from Bitcoin's magic bits.
headerData = headerData + 'inv\x00\x00\x00\x00\x00\x00\x00\x00\x00'
headerData = headerData + pack('>L',len(payload))
headerData = headerData + hashlib.sha512(payload).digest()[:4]
print 'Sending inv message to just this one peer'
self.sock.send(headerData + payload)
#We have received a broadcast message
def recbroadcast(self):
#First we must check to make sure the proof of work is sufficient.
POW, = unpack('>Q',hashlib.sha512(self.data[24:24+self.payloadLength]).digest()[4:12])
if POW > 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
print 'The proof of work in this broadcast message is insufficient. Ignoring message.'
#POW, = unpack('>Q',hashlib.sha512(self.data[24:24+self.payloadLength]).digest()[4:12])
#if POW > 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
# print 'The proof of work in this broadcast message is insufficient. Ignoring message.'
# return
if not self.isProofOfWorkSufficient():
print 'Proof of work in broadcast message insufficient.'
return
embeddedTime, = unpack('>I',self.data[32:36])
if embeddedTime > (int(time.time())+10800): #prevent funny business
@ -510,13 +501,16 @@ class receiveDataThread(QThread):
#We have received a msg message.
def recmsg(self):
#First we must check to make sure the proof of work is sufficient.
POW, = unpack('>Q',hashlib.sha512(self.data[24:24+self.payloadLength]).digest()[4:12])
print 'POW:', POW
initialDecryptionSuccessful = False
if POW > 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
#POW, = unpack('>Q',hashlib.sha512(self.data[24:24+self.payloadLength]).digest()[4:12])
#print 'POW:', POW
#if POW > 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
# print 'Proof of work in msg message insufficient.'
# return
if not self.isProofOfWorkSufficient():
print 'Proof of work in msg message insufficient.'
return
initialDecryptionSuccessful = False
readPosition = 32
embeddedTime, = unpack('>I',self.data[readPosition:readPosition+4])
if embeddedTime > int(time.time())+10800:
@ -547,7 +541,7 @@ class receiveDataThread(QThread):
#Let's check whether this is a message acknowledgement bound for us.
if self.data[readPosition:24+self.payloadLength] in ackdataForWhichImWatching:
printLock.acquire()
print 'This msg is an acknowledgement bound for me.'
print 'This msg IS an acknowledgement bound for me.'
printLock.release()
del ackdataForWhichImWatching[self.data[readPosition:24+self.payloadLength]]
t = ('ackreceived',self.data[readPosition:24+self.payloadLength])
@ -561,8 +555,8 @@ class receiveDataThread(QThread):
return
else:
printLock.acquire()
print 'This was NOT an acknowledgement bound for me. Msg potential ack data:', repr(self.data[readPosition:24+self.payloadLength])
print 'ackdataForWhichImWatching', ackdataForWhichImWatching
print 'This was NOT an acknowledgement bound for me.' #Msg potential ack data:', repr(self.data[readPosition:24+self.payloadLength])
#print 'ackdataForWhichImWatching', ackdataForWhichImWatching
printLock.release()
#This is not an acknowledgement bound for me. See if it is a message bound for me by trying to decrypt it with my private keys.
@ -723,37 +717,52 @@ class receiveDataThread(QThread):
sqlLock.release()
self.emit(SIGNAL("displayNewMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),inventoryHash,toAddress,fromAddress,subject,body)
#Now let's send the acknowledgement
POW, = unpack('>Q',hashlib.sha512(hashlib.sha512(ackData[24:]).digest()).digest()[4:12])
if POW <= 2**64 / ((len(ackData[24:])+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
print 'The POW is strong enough that this ackdataPayload will be accepted by the Bitmessage network.'
#POW, = unpack('>Q',hashlib.sha512(hashlib.sha512(ackData[24:]).digest()).digest()[4:12])
#if POW <= 2**64 / ((len(ackData[24:])+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
#print 'The POW is strong enough that this ackdataPayload will be accepted by the Bitmessage network.'
#Currently PyBitmessage only supports sending a message with the acknowledgement in the form of a msg message. But future versions, and other clients, could send any object and this software will relay them. This can be used to relay identifying information, like your public key, through another Bitmessage host in case you believe that your Internet connection is being individually watched. You may pick a random address, hope its owner is online, and send a message with encoding type 0 so that they ignore the message but send your acknowledgement data over the network. If you send and receive many messages, it would also be clever to take someone else's acknowledgement data and use it for your own. Assuming that your message is delivered successfully, both will be acknowledged simultaneously (though if it is not delivered successfully, you will be in a pickle.)
#print 'self.data before:', repr(self.data)
#We'll need to make sure that our client will properly process the ackData; if the packet is malformed, we could clear out self.data and an attacker could use that behavior to determine that we were capable of decoding this message.
ackDataValidThusFar = True
if len(ackData) < 24:
print 'The length of Ackdata is unreasonably short. Not sending ackData.'
ackDataValidThusFar = False
if ackData[0:4] != '\xe9\xbe\xb4\xd9':
print 'Ackdata magic bytes were wrong. Not sending ackData.'
ackDataValidThusFar = False
if ackDataValidThusFar:
ackDataPayloadLength, = unpack('>L',ackData[16:20])
if len(ackData)-24 != ackDataPayloadLength:
print 'ackData payload length doesn\'t match the payload length specified in the header. Not sending ackdata.'
ackDataValidThusFar = False
if ackDataValidThusFar:
print 'ackData is valid. Will process it.'
self.data = self.data[:self.payloadLength+24] + ackData + self.data[self.payloadLength+24:]
#print 'self.data after:', repr(self.data)
'''if ackData[4:16] == 'msg\x00\x00\x00\x00\x00\x00\x00\x00\x00':
inventoryHash = calculateInventoryHash(ackData[24:])
#objectType = 'msg'
#inventory[inventoryHash] = (objectType, self.streamNumber, ackData[24:], embeddedTime) #We should probably be storing the embeddedTime of the ackData, not the embeddedTime of the original incoming msg message, but this is probably close enough.
#print 'sending the inv for the msg which is actually an acknowledgement (within sendmsg function)'
#self.broadcastinv(inventoryHash)
self.data[:payloadLength+24] + ackData + self.data[payloadLength+24:]
elif ackData[4:16] == 'getpubkey\x00\x00\x00':
#objectType = 'getpubkey'
#inventory[inventoryHash] = (objectType, self.streamNumber, ackData[24:], embeddedTime) #We should probably be storing the embeddedTime of the ackData, not the embeddedTime of the original incoming msg message, but this is probably close enough.
#print 'sending the inv for the getpubkey which is actually an acknowledgement (within sendmsg function)'
self.data[:payloadLength+24] + ackData + self.data[payloadLength+24:]
elif ackData[4:16] == 'pubkey\x00\x00\x00\x00\x00\x00':
#objectType = 'pubkey'
#inventory[inventoryHash] = (objectType, self.streamNumber, ackData[24:], embeddedTime) #We should probably be storing the embeddedTime of the ackData, not the embeddedTime of the original incoming msg message, but this is probably close enough.
#print 'sending the inv for a pubkey which is actually an acknowledgement (within sendmsg function)'
self.data[:payloadLength+24] + ackData + self.data[payloadLength+24:]
elif ackData[4:16] == 'broadcast\x00\x00\x00':
#objectType = 'broadcast'
#inventory[inventoryHash] = (objectType, self.streamNumber, ackData[24:], embeddedTime) #We should probably be storing the embeddedTime of the ackData, not the embeddedTime of the original incoming msg message, but this is probably close enough.
#print 'sending the inv for a broadcast which is actually an acknowledgement (within sendmsg function)'
self.data[:payloadLength+24] + ackData + self.data[payloadLength+24:]'''
else:
print 'ACK POW not strong enough to be accepted by the Bitmessage network.'
'''if ackData[4:16] == 'msg\x00\x00\x00\x00\x00\x00\x00\x00\x00':
inventoryHash = calculateInventoryHash(ackData[24:])
#objectType = 'msg'
#inventory[inventoryHash] = (objectType, self.streamNumber, ackData[24:], embeddedTime) #We should probably be storing the embeddedTime of the ackData, not the embeddedTime of the original incoming msg message, but this is probably close enough.
#print 'sending the inv for the msg which is actually an acknowledgement (within sendmsg function)'
#self.broadcastinv(inventoryHash)
self.data[:payloadLength+24] + ackData + self.data[payloadLength+24:]
elif ackData[4:16] == 'getpubkey\x00\x00\x00':
#objectType = 'getpubkey'
#inventory[inventoryHash] = (objectType, self.streamNumber, ackData[24:], embeddedTime) #We should probably be storing the embeddedTime of the ackData, not the embeddedTime of the original incoming msg message, but this is probably close enough.
#print 'sending the inv for the getpubkey which is actually an acknowledgement (within sendmsg function)'
self.data[:payloadLength+24] + ackData + self.data[payloadLength+24:]
elif ackData[4:16] == 'pubkey\x00\x00\x00\x00\x00\x00':
#objectType = 'pubkey'
#inventory[inventoryHash] = (objectType, self.streamNumber, ackData[24:], embeddedTime) #We should probably be storing the embeddedTime of the ackData, not the embeddedTime of the original incoming msg message, but this is probably close enough.
#print 'sending the inv for a pubkey which is actually an acknowledgement (within sendmsg function)'
self.data[:payloadLength+24] + ackData + self.data[payloadLength+24:]
elif ackData[4:16] == 'broadcast\x00\x00\x00':
#objectType = 'broadcast'
#inventory[inventoryHash] = (objectType, self.streamNumber, ackData[24:], embeddedTime) #We should probably be storing the embeddedTime of the ackData, not the embeddedTime of the original incoming msg message, but this is probably close enough.
#print 'sending the inv for a broadcast which is actually an acknowledgement (within sendmsg function)'
self.data[:payloadLength+24] + ackData + self.data[payloadLength+24:]'''
#else:
#print 'ACK POW not strong enough to be accepted by the Bitmessage network.'
else:
print 'This program cannot decode messages from addresses with versions higher than 1. Ignoring.'
@ -776,16 +785,22 @@ class receiveDataThread(QThread):
if inventoryHash in inventory:
print 'We have already received this pubkey. Ignoring it.'
return
elif isInSqlInventory(inventoryHash):
print 'We have already received this pubkey (it is stored on disk in the SQL inventory). Ignoring it.'
return
#We must check to make sure the proof of work is sufficient.
POW, = unpack('>Q',hashlib.sha512(hashlib.sha512(self.data[24:24+self.payloadLength]).digest()).digest()[4:12])
print 'POW:', POW
if POW > 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
printLock.acquire()
print 'The Proof of Work in the pubkey message is insufficient. Ignoring it.'
print 'pubkey payload length:', len(self.data[24:self.payloadLength+24])
print repr(self.data[24:self.payloadLength+24])
printLock.release()
#POW, = unpack('>Q',hashlib.sha512(hashlib.sha512(self.data[24:24+self.payloadLength]).digest()).digest()[4:12])
#print 'POW:', POW
#if POW > 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
# printLock.acquire()
# print 'The Proof of Work in the pubkey message is insufficient. Ignoring it.'
# print 'pubkey payload length:', len(self.data[24:self.payloadLength+24])
# print repr(self.data[24:self.payloadLength+24])
# printLock.release()
# return
if not self.isProofOfWorkSufficient():
print 'Proof of work in pubkey message insufficient.'
return
objectType = 'pubkey'
@ -844,10 +859,13 @@ class receiveDataThread(QThread):
objectType = 'pubkeyrequest'
inventory[inventoryHash] = (objectType, self.streamNumber, self.data[24:self.payloadLength+24], int(time.time()))
#First we must check to make sure the proof of work is sufficient.
POW, = unpack('>Q',hashlib.sha512(hashlib.sha512(self.data[24:24+self.payloadLength]).digest()).digest()[4:12])
print 'POW:', POW
if POW > 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
print 'POW value in getpubkey message is insufficient. Ignoring it.'
#POW, = unpack('>Q',hashlib.sha512(hashlib.sha512(self.data[24:24+self.payloadLength]).digest()).digest()[4:12])
#print 'POW:', POW
#if POW > 2**64 / ((self.payloadLength+payloadLengthExtraBytes) * averageProofOfWorkNonceTrialsPerByte):
# print 'POW value in getpubkey message is insufficient. Ignoring it.'
# return
if not self.isProofOfWorkSufficient():
print 'Proof of work in getpubkey message insufficient.'
return
#Now let us make sure that the getpubkey request isn't too old or with a fake (future) time.
embeddedTime, = unpack('>I',self.data[32:36])
@ -889,11 +907,13 @@ class receiveDataThread(QThread):
nonce = 0
trialValue = 99999999999999999999
target = 2**64 / ((len(payload)+payloadLengthExtraBytes+8) * averageProofOfWorkNonceTrialsPerByte) #The 108 added to the payload length is 8 for the size of the nonce + 50 as an extra penalty simply for having this seperate message exist.
target = 2**64 / ((len(payload)+payloadLengthExtraBytes+8) * averageProofOfWorkNonceTrialsPerByte)
print '(For pubkey message) Doing proof of work...'
initialHash = hashlib.sha512(payload).digest()
while trialValue > target:
nonce += 1
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + payload).digest()).digest()[4:12])
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
#trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + payload).digest()).digest()[4:12])
print '(For pubkey message) Found proof of work', trialValue, 'Nonce:', nonce
payload = pack('>Q',nonce) + payload
@ -1340,7 +1360,8 @@ class receiveDataThread(QThread):
#Sends a verack message
def sendverack(self):
print 'Sending verack'
self.sock.sendall('\xE9\xBE\xB4\xD9\x76\x65\x72\x61\x63\x6B\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x82\x6D\xf0\x68')
self.sock.sendall('\xE9\xBE\xB4\xD9\x76\x65\x72\x61\x63\x6B\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xcf\x83\xe1\x35')
#cf 83 e1 35
self.verackSent = True
if self.verackReceived == True:
self.connectionFullyEstablished()
@ -1406,14 +1427,14 @@ class sendDataThread(QThread):
while True:
deststream,command,data = self.mailbox.get()
printLock.acquire()
print 'within a sendDataThread, destream:', deststream,', Command:', command, self
print 'sendDataThread, destream:', deststream, ', Command:', command, ', ID:',id(self), ', HOST:', self.HOST
printLock.release()
if deststream == self.streamNumber or deststream == 0:
if command == 'shutdown':
if data == self.HOST or data == 'all':
printLock.acquire()
print 'sendDataThread thread (associated with', self.HOST,')', self, 'shutting down now.'
print 'sendDataThread thread (associated with', self.HOST,') ID:',id(self), 'shutting down now.'
self.sock.close()
sendDataQueues.remove(self.mailbox)
print 'len of sendDataQueues', len(sendDataQueues)
@ -1423,7 +1444,7 @@ class sendDataThread(QThread):
hostInMessage, specifiedStreamNumber = data
if hostInMessage == self.HOST:
printLock.acquire()
print 'setting the stream number in the sendData thread to', specifiedStreamNumber, self
print 'setting the stream number in the sendData thread (ID:',id(self), ') to', specifiedStreamNumber
printLock.release()
self.streamNumber = specifiedStreamNumber
elif command == 'send':
@ -1444,7 +1465,7 @@ class sendDataThread(QThread):
#Send out a pong message to keep the connection alive.
print 'Sending pong to', self.HOST, 'to keep connection alive.'
try:
self.sock.sendall('\xE9\xBE\xB4\xD9\x70\x6F\x6E\x67\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x82\x6D\xf0\x68')
self.sock.sendall('\xE9\xBE\xB4\xD9\x70\x6F\x6E\x67\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xcf\x83\xe1\x35')
self.lastTimeISentData = int(time.time())
except:
print 'self.sock.send pong failed'
@ -1753,9 +1774,10 @@ class singleWorker(QThread):
trialValue = 99999999999999999999
target = 2**64 / ((len(payload)+payloadLengthExtraBytes+8) * averageProofOfWorkNonceTrialsPerByte)
print '(For broadcast message) Doing proof of work...'
initialHash = hashlib.sha512(payload).digest()
while trialValue > target:
nonce += 1
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + payload).digest()).digest()[4:12])
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
print '(For broadcast message) Found proof of work', trialValue, 'Nonce:', nonce
payload = pack('>Q',nonce) + payload
@ -1873,9 +1895,10 @@ class singleWorker(QThread):
target = 2**64 / ((len(payload)+payloadLengthExtraBytes+8) * averageProofOfWorkNonceTrialsPerByte)
print '(For msg message) Doing proof of work. Target:', target
powStartTime = time.time()
initialHash = hashlib.sha512(payload).digest()
while trialValue > target:
nonce += 1
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + payload).digest()).digest()[4:12])
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
print '(For msg message) Found proof of work', trialValue, 'Nonce:', nonce
print 'POW took', int(time.time()-powStartTime), 'seconds.', nonce/(time.time()-powStartTime), 'nonce trials per second.'
payload = pack('>Q',nonce) + payload
@ -1921,9 +1944,10 @@ class singleWorker(QThread):
self.emit(SIGNAL("updateSentItemStatusByHash(PyQt_PyObject,PyQt_PyObject)"),ripe,'Doing work necessary to request public key.')
print 'Doing proof-of-work necessary to send getpubkey message.'
target = 2**64 / ((len(payload)+payloadLengthExtraBytes+8) * averageProofOfWorkNonceTrialsPerByte)
initialHash = hashlib.sha512(payload).digest()
while trialValue > target:
nonce += 1
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + payload).digest()).digest()[4:12])
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
print 'Found proof of work', trialValue, 'Nonce:', nonce
payload = pack('>Q',nonce) + payload
@ -1950,11 +1974,18 @@ class singleWorker(QThread):
encodedStreamNumber = encodeVarint(toStreamNumber)
payload = embeddedTime + encodedStreamNumber + ackdata
target = 2**64 / ((len(payload)+payloadLengthExtraBytes+8) * averageProofOfWorkNonceTrialsPerByte)
printLock.acquire()
print '(For ack message) Doing proof of work...'
printLock.release()
powStartTime = time.time()
initialHash = hashlib.sha512(payload).digest()
while trialValue > target:
nonce += 1
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + payload).digest()).digest()[4:12])
trialValue, = unpack('>Q',hashlib.sha512(hashlib.sha512(pack('>Q',nonce) + initialHash).digest()).digest()[0:8])
printLock.acquire()
print '(For ack message) Found proof of work', trialValue, 'Nonce:', nonce
print 'POW took', int(time.time()-powStartTime), 'seconds.', nonce/(time.time()-powStartTime), 'nonce trials per second.'
printLock.release()
payload = pack('>Q',nonce) + payload
headerData = '\xe9\xbe\xb4\xd9' #magic bits, slighly different from Bitcoin's magic bits.
headerData = headerData + 'msg\x00\x00\x00\x00\x00\x00\x00\x00\x00'
@ -2508,7 +2539,7 @@ class MyForm(QtGui.QMainWindow):
def updateNetworkStatusTab(self,streamNumber,connectionCount):
global statusIconColor
print 'updating network status tab'
#print 'updating network status tab'
totalNumberOfConnectionsFromAllStreams = 0 #One would think we could use len(sendDataQueues) for this, but sendData threads don't remove themselves from sendDataQueues fast enough for len(sendDataQueues) to be accurate here.
for currentRow in range(self.ui.tableWidgetConnectionCount.rowCount()):
rowStreamNumber = int(self.ui.tableWidgetConnectionCount.item(currentRow,0).text())
@ -2523,7 +2554,7 @@ class MyForm(QtGui.QMainWindow):
def setStatusIcon(self,color):
global statusIconColor
print 'setting status icon color'
#print 'setting status icon color'
if color == 'red':
self.ui.pushButtonStatusIcon.setIcon(QIcon(":/newPrefix/images/redicon.png"))
statusIconColor = 'red'
@ -2653,7 +2684,6 @@ class MyForm(QtGui.QMainWindow):
random.seed()
ackdata += pack('>Q',random.randrange(1, 18446744073709551615))
ackdataForWhichImWatching[ackdata] = 0
print 'ackdataForWhichImWatching within pushButtonSend', repr(ackdataForWhichImWatching)
sqlLock.acquire()
t = ('',toAddress,ripe,fromAddress,subject,message,ackdata,int(time.time()),'findingpubkey',1,1,'sent')
sqlSubmitQueue.put('''INSERT INTO sent VALUES (?,?,?,?,?,?,?,?,?,?,?,?)''')
@ -3391,9 +3421,9 @@ eightBytesOfRandomDataUsedToDetectConnectionsToSelf = pack('>Q',random.randrange
connectedHostsList = {} #List of hosts to which we are connected. Used to guarantee that the outgoingSynSender thread won't connect to the same remote node twice.
neededPubkeys = {}
#These constants are not at the top because if changed they will cause particularly unexpected behavior
averageProofOfWorkNonceTrialsPerByte = 2 #The amount of work that should be performed (and demanded) per byte of the payload. Double this number to double the work.
payloadLengthExtraBytes = 1 #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.
#These constants are not at the top because if changed they 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!
averageProofOfWorkNonceTrialsPerByte = 320 #The amount of work that should be performed (and demanded) per byte of the payload. Double this number to double the work.
payloadLengthExtraBytes = 14000 #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.
if __name__ == "__main__":
major, minor, revision = sqlite3.sqlite_version_info
@ -3471,4 +3501,8 @@ if __name__ == "__main__":
if 'win' in sys.platform:
myapp.setWindowFlags(Qt.ToolTip)
sys.exit(app.exec_())
sys.exit(app.exec_())
# So far, the Bitmessage protocol, this client, the Wiki, and the forums
# are all a one-man operation. Bitcoin tips are quite appreciated!
# 1H5XaDA6fYENLbknwZyjiYXYPQaFjjLX2u

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defaultKnownNodes.py
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@ -67,7 +67,7 @@ if __name__ == "__main__":
appdata = path.expanduser(path.join("~", "." + APPNAME + "/"))
#print 'New list of all known nodes:', createDefaultKnownNodes(appdata)
print 'New list of all known nodes:', createDefaultKnownNodes(appdata)
readDefaultKnownNodes(appdata)

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