cis-kuldeep/PyBitmessage-2021-04-27
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Implimented broadcast encryption (testing)

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This commit is contained in:
Jonathan Warren 2013-04-26 17:12:35 -04:00
parent 896b96b7c7
commit d14be90c3b
1 changed files with 123 additions and 128 deletions
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41
src/bitmessagemain.py
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@ -721,8 +721,8 @@ class receiveDataThread(QThread):
printLock.acquire() printLock.acquire()
print 'Length of time program spent failing to decrypt this v2 broadcast:', time.time()- self.messageProcessingStartTime, 'seconds.' print 'Length of time program spent failing to decrypt this v2 broadcast:', time.time()- self.messageProcessingStartTime, 'seconds.'
printLock.release() printLock.release()
else: return
#This is a broadcast I have decrypted and thus am interested in. #At this point this is a broadcast I have decrypted and thus am interested in.
signedBroadcastVersion, readPosition = decodeVarint(decryptedData[:10]) signedBroadcastVersion, readPosition = decodeVarint(decryptedData[:10])
beginningOfPubkeyPosition = readPosition #used when we add the pubkey to our pubkey table beginningOfPubkeyPosition = readPosition #used when we add the pubkey to our pubkey table
sendersAddressVersion, sendersAddressVersionLength = decodeVarint(decryptedData[readPosition:readPosition+9]) sendersAddressVersion, sendersAddressVersionLength = decodeVarint(decryptedData[readPosition:readPosition+9])
@ -950,15 +950,7 @@ class receiveDataThread(QThread):
printLock.release() printLock.release()
else: else:
#This is a message bound for me. #This is a message bound for me.
#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.
toAddress = myAddressesByHash[toRipe] #Look up my address based on the RIPE hash. toAddress = myAddressesByHash[toRipe] #Look up my address based on the RIPE hash.
if decodeAddress(toAddress)[1] >= 3:#If the toAddress version number is 3 or higher:
requiredNonceTrialsPerByte = config.getint(toAddress,'noncetrialsperbyte')
requiredPayloadLengthExtraBytes = config.getint(toAddress,'payloadlengthextrabytes')
if not self.isProofOfWorkSufficient(encryptedData,requiredNonceTrialsPerByte,requiredPayloadLengthExtraBytes):
print 'Proof of work in msg message insufficient only because it does not meet our higher requirement.'
return
readPosition = 0 readPosition = 0
messageVersion, messageVersionLength = decodeVarint(decryptedData[readPosition:readPosition+10]) messageVersion, messageVersionLength = decodeVarint(decryptedData[readPosition:readPosition+10])
readPosition += messageVersionLength readPosition += messageVersionLength
@ -1042,18 +1034,24 @@ class receiveDataThread(QThread):
sqlSubmitQueue.put('commit') sqlSubmitQueue.put('commit')
sqlLock.release() sqlLock.release()
workerQueue.put(('newpubkey',(sendersAddressVersionNumber,sendersStreamNumber,ripe.digest()))) #This will check to see whether we happen to be awaiting this pubkey in order to send a message. If we are, it will do the POW and send it. workerQueue.put(('newpubkey',(sendersAddressVersionNumber,sendersStreamNumber,ripe.digest()))) #This will check to see whether we happen to be awaiting this pubkey in order to send a message. If we are, it will do the POW and send it.
blockMessage = False #Gets set to True if the user shouldn't see the message according to black or white lists.
fromAddress = encodeAddress(sendersAddressVersionNumber,sendersStreamNumber,ripe.digest()) fromAddress = encodeAddress(sendersAddressVersionNumber,sendersStreamNumber,ripe.digest())
#If this message is bound for one of my version 3 addresses (or higher), then we must check to make sure it meets our demanded proof of work requirement.
if decodeAddress(toAddress)[1] >= 3:#If the toAddress version number is 3 or higher:
if not isAddressInMyAddressBookSubscriptionsListOrWhitelist(fromAddress): #If I'm not friendly with this person:
requiredNonceTrialsPerByte = config.getint(toAddress,'noncetrialsperbyte')
requiredPayloadLengthExtraBytes = config.getint(toAddress,'payloadlengthextrabytes')
if not self.isProofOfWorkSufficient(encryptedData,requiredNonceTrialsPerByte,requiredPayloadLengthExtraBytes):
print 'Proof of work in msg message insufficient only because it does not meet our higher requirement.'
return
blockMessage = False #Gets set to True if the user shouldn't see the message according to black or white lists.
if config.get('bitmessagesettings', 'blackwhitelist') == 'black': #If we are using a blacklist if config.get('bitmessagesettings', 'blackwhitelist') == 'black': #If we are using a blacklist
t = (fromAddress,) t = (fromAddress,)
sqlLock.acquire() sqlLock.acquire()
sqlSubmitQueue.put('''SELECT label, enabled FROM blacklist where address=?''') sqlSubmitQueue.put('''SELECT label FROM blacklist where address=? and enabled='1' ''')
sqlSubmitQueue.put(t) sqlSubmitQueue.put(t)
queryreturn = sqlReturnQueue.get() queryreturn = sqlReturnQueue.get()
sqlLock.release() sqlLock.release()
for row in queryreturn: if queryreturn != []:
label, enabled = row
if enabled:
printLock.acquire() printLock.acquire()
print 'Message ignored because address is in blacklist.' print 'Message ignored because address is in blacklist.'
printLock.release() printLock.release()
@ -1061,18 +1059,13 @@ class receiveDataThread(QThread):
else: #We're using a whitelist else: #We're using a whitelist
t = (fromAddress,) t = (fromAddress,)
sqlLock.acquire() sqlLock.acquire()
sqlSubmitQueue.put('''SELECT label, enabled FROM whitelist where address=?''') sqlSubmitQueue.put('''SELECT label FROM whitelist where address=? and enabled='1' ''')
sqlSubmitQueue.put(t) sqlSubmitQueue.put(t)
queryreturn = sqlReturnQueue.get() queryreturn = sqlReturnQueue.get()
sqlLock.release() sqlLock.release()
if queryreturn == []: if queryreturn == []:
print 'Message ignored because address not in whitelist.' print 'Message ignored because address not in whitelist.'
blockMessage = True blockMessage = True
for row in queryreturn: #It could be in the whitelist but disabled. Let's check.
label, enabled = row
if not enabled:
print 'Message ignored because address in whitelist but not enabled.'
blockMessage = True
if not blockMessage: if not blockMessage:
print 'fromAddress:', fromAddress print 'fromAddress:', fromAddress
print 'First 150 characters of message:', repr(message[:150]) print 'First 150 characters of message:', repr(message[:150])
@ -1514,7 +1507,9 @@ class receiveDataThread(QThread):
#Send a getdata message to our peer to request the object with the given hash #Send a getdata message to our peer to request the object with the given hash
def sendgetdata(self,hash): def sendgetdata(self,hash):
printLock.acquire()
print 'sending getdata to retrieve object with hash:', hash.encode('hex') print 'sending getdata to retrieve object with hash:', hash.encode('hex')
printLock.release()
payload = '\x01' + hash payload = '\x01' + hash
headerData = '\xe9\xbe\xb4\xd9' #magic bits, slighly different from Bitcoin's magic bits. headerData = '\xe9\xbe\xb4\xd9' #magic bits, slighly different from Bitcoin's magic bits.
headerData += 'getdata\x00\x00\x00\x00\x00' headerData += 'getdata\x00\x00\x00\x00\x00'
@ -1990,6 +1985,7 @@ class sendDataThread(QThread):
self.HOST = HOST self.HOST = HOST
self.PORT = PORT self.PORT = PORT
self.streamNumber = streamNumber self.streamNumber = streamNumber
self.remoteProtocolVersion = -1 #This must be set using setRemoteProtocolVersion command which is sent through the self.mailbox queue.
self.lastTimeISentData = int(time.time()) #If this value increases beyond five minutes ago, we'll send a pong message to keep the connection alive. self.lastTimeISentData = int(time.time()) #If this value increases beyond five minutes ago, we'll send a pong message to keep the connection alive.
self.objectsOfWhichThisRemoteNodeIsAlreadyAware = objectsOfWhichThisRemoteNodeIsAlreadyAware self.objectsOfWhichThisRemoteNodeIsAlreadyAware = objectsOfWhichThisRemoteNodeIsAlreadyAware
printLock.acquire() printLock.acquire()
@ -2092,7 +2088,7 @@ class sendDataThread(QThread):
break break
else: else:
printLock.acquire() printLock.acquire()
print 'sendDataThread ID:',id(self),'ignoring command', command,'because it is not in stream',deststream print 'sendDataThread ID:',id(self),'ignoring command', command,'because the thread is not in stream',deststream
printLock.release() printLock.release()
@ -5573,7 +5569,6 @@ class MyForm(QtGui.QMainWindow):
if addressVersionNumber == 2: if addressVersionNumber == 2:
broadcastSendersForWhichImWatching[hash] = 0 broadcastSendersForWhichImWatching[hash] = 0
#Now, for all addresses, even version 2 addresses, we should create Cryptor objects in a dictionary which we will use to attempt to decrypt encrypted broadcast messages. #Now, for all addresses, even version 2 addresses, we should create Cryptor objects in a dictionary which we will use to attempt to decrypt encrypted broadcast messages.
print '(Within reloadBroadcastSendersForWhichImWatching) The string that we will hash to make the privEncryptionKey is', (encodeVarint(addressVersionNumber)+encodeVarint(streamNumber)+hash).encode('hex')
privEncryptionKey = hashlib.sha512(encodeVarint(addressVersionNumber)+encodeVarint(streamNumber)+hash).digest()[:32] privEncryptionKey = hashlib.sha512(encodeVarint(addressVersionNumber)+encodeVarint(streamNumber)+hash).digest()[:32]
MyECSubscriptionCryptorObjects[hash] = highlevelcrypto.makeCryptor(privEncryptionKey.encode('hex')) MyECSubscriptionCryptorObjects[hash] = highlevelcrypto.makeCryptor(privEncryptionKey.encode('hex'))