minor code refactoring

This commit is contained in:
Jonathan Warren 2013-02-07 16:31:15 -05:00
parent a9147bb215
commit 5b463cf54c

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@ -1316,8 +1316,15 @@ class receiveDataThread(QThread):
if embeddedTime < int(time.time())-maximumAgeOfAnObjectThatIAmWillingToAccept: if embeddedTime < int(time.time())-maximumAgeOfAnObjectThatIAmWillingToAccept:
print 'The time in this getpubkey message is too old. Ignoring it. Time:', embeddedTime print 'The time in this getpubkey message is too old. Ignoring it. Time:', embeddedTime
return return
inventoryLock.acquire()
addressVersionNumber, addressVersionLength = decodeVarint(self.data[36:42])
streamNumber, streamNumberLength = decodeVarint(self.data[36+addressVersionLength:42+addressVersionLength])
if streamNumber <> self.streamNumber:
print 'The streamNumber', streamNumber, 'doesn\'t match our stream number:', self.streamNumber
return
inventoryHash = calculateInventoryHash(self.data[24:self.payloadLength+24]) inventoryHash = calculateInventoryHash(self.data[24:self.payloadLength+24])
inventoryLock.acquire()
if inventoryHash in inventory: if inventoryHash in inventory:
print 'We have already received this getpubkey request. Ignoring it.' print 'We have already received this getpubkey request. Ignoring it.'
inventoryLock.release() inventoryLock.release()
@ -1326,22 +1333,13 @@ class receiveDataThread(QThread):
print 'We have already received this getpubkey request (it is stored on disk in the SQL inventory). Ignoring it.' print 'We have already received this getpubkey request (it is stored on disk in the SQL inventory). Ignoring it.'
inventoryLock.release() inventoryLock.release()
return return
self.objectsOfWhichThisRemoteNodeIsAlreadyAware[inventoryHash] = 0 self.objectsOfWhichThisRemoteNodeIsAlreadyAware[inventoryHash] = 0
objectType = 'getpubkey' objectType = 'getpubkey'
inventory[inventoryHash] = (objectType, self.streamNumber, self.data[24:self.payloadLength+24], embeddedTime) inventory[inventoryHash] = (objectType, self.streamNumber, self.data[24:self.payloadLength+24], embeddedTime)
inventoryLock.release() inventoryLock.release()
#Now let us make sure that the getpubkey request isn't too old or with a fake (future) time.
addressVersionNumber, addressVersionLength = decodeVarint(self.data[36:42])
streamNumber, streamNumberLength = decodeVarint(self.data[36+addressVersionLength:42+addressVersionLength])
if streamNumber <> self.streamNumber:
print 'The streamNumber', streamNumber, 'doesn\'t match our stream number:', self.streamNumber
return
#This getpubkey request is valid so far. Forward to peers. #This getpubkey request is valid so far. Forward to peers.
self.broadcastinv(inventoryHash) self.broadcastinv(inventoryHash)
if addressVersionNumber == 0: if addressVersionNumber == 0:
print 'The addressVersionNumber of the pubkey request is zero. That doesn\'t make any sense. Ignoring it.' print 'The addressVersionNumber of the pubkey request is zero. That doesn\'t make any sense. Ignoring it.'
return return
@ -1865,7 +1863,6 @@ class sendDataThread(QThread):
def run(self): def run(self):
message = ''
while True: while True:
deststream,command,data = self.mailbox.get() deststream,command,data = self.mailbox.get()
#printLock.acquire() #printLock.acquire()
@ -2127,7 +2124,7 @@ It cleans these data structures in memory:
It cleans these tables on the disk: It cleans these tables on the disk:
inventory (clears data more than 2 days and 12 hours old) inventory (clears data more than 2 days and 12 hours old)
pubkeys (clears data older than the date specified in the table. This is because we won't want to hold pubkeys that show up randomly as long as those that we have actually have used.) pubkeys (clears data older than the date specified in the table)
It resends messages when there has been no response: It resends messages when there has been no response:
resends getpubkey messages in two days (then 4 days, then 8 days, etc...) resends getpubkey messages in two days (then 4 days, then 8 days, etc...)
@ -2481,7 +2478,7 @@ class singleWorker(QThread):
payload = '\x01' #Message version. payload = '\x01' #Message version.
payload += encodeVarint(fromAddressVersionNumber) payload += encodeVarint(fromAddressVersionNumber)
payload += encodeVarint(fromStreamNumber) payload += encodeVarint(fromStreamNumber)
payload += '\x00\x00\x00\x01' payload += '\x00\x00\x00\x01' #Bitfield of features and behaviors that can be expected from me. (See https://bitmessage.org/wiki/Protocol_specification#Pubkey_bitfield_features )
#We need to convert our private keys to public keys in order to include them. #We need to convert our private keys to public keys in order to include them.
privSigningKeyBase58 = config.get(fromaddress, 'privsigningkey') privSigningKeyBase58 = config.get(fromaddress, 'privsigningkey')
@ -2493,22 +2490,22 @@ class singleWorker(QThread):
pubSigningKey = highlevelcrypto.privToPub(privSigningKeyHex).decode('hex') pubSigningKey = highlevelcrypto.privToPub(privSigningKeyHex).decode('hex')
pubEncryptionKey = highlevelcrypto.privToPub(privEncryptionKeyHex).decode('hex') pubEncryptionKey = highlevelcrypto.privToPub(privEncryptionKeyHex).decode('hex')
payload += pubSigningKey[1:] payload += pubSigningKey[1:] #The \x04 on the beginning of the public keys are not sent. This way there is only one acceptable way to encode and send a public key.
payload += pubEncryptionKey[1:] payload += pubEncryptionKey[1:]
payload += toHash payload += toHash #This hash will be checked by the receiver of the message to verify that toHash belongs to them. This prevents a Surreptitious Forwarding Attack.
payload += '\x02' #Type 2 is simple UTF-8 message encoding. payload += '\x02' #Type 2 is simple UTF-8 message encoding as specified on the Protocol Specification on the Bitmessage Wiki.
messageToTransmit = 'Subject:' + subject + '\n' + 'Body:' + message messageToTransmit = 'Subject:' + subject + '\n' + 'Body:' + message
payload += encodeVarint(len(messageToTransmit)) payload += encodeVarint(len(messageToTransmit))
payload += messageToTransmit payload += messageToTransmit
fullAckPayload = self.generateFullAckMessage(ackdata,toStreamNumber) fullAckPayload = self.generateFullAckMessage(ackdata,toStreamNumber)#The fullAckPayload is a normal msg protocol message with the proof of work already completed that the receiver of this message can easily send out.
payload += encodeVarint(len(fullAckPayload)) payload += encodeVarint(len(fullAckPayload))
payload += fullAckPayload payload += fullAckPayload
signature = highlevelcrypto.sign(payload,privSigningKeyHex) signature = highlevelcrypto.sign(payload,privSigningKeyHex)
payload += encodeVarint(len(signature)) payload += encodeVarint(len(signature))
payload += signature payload += signature
elif fromAddressVersionNumber == 1: elif fromAddressVersionNumber == 1: #This code is for old version 1 (RSA) addresses. It will soon be removed.
payload = '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' #this run of nulls allows the true message receiver to identify his message payload = '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' #this run of nulls allows the true message receiver to identify his message
payload += '\x01' #Message version. payload += '\x01' #Message version.
payload += '\x00\x00\x00\x01' payload += '\x00\x00\x00\x01'
@ -2555,6 +2552,7 @@ class singleWorker(QThread):
for row in queryreturn: for row in queryreturn:
hash, havecorrectnonce, pubkeyPayload, timeLastRequested = row hash, havecorrectnonce, pubkeyPayload, timeLastRequested = row
#The pubkey is stored the way we originally received it which means that we need to read beyond things like the nonce and time to get to the public keys.
readPosition = 8 #to bypass the nonce readPosition = 8 #to bypass the nonce
readPosition += 4 #to bypass the embedded time readPosition += 4 #to bypass the embedded time
readPosition += 1 #to bypass the address version whose length is definitely 1 readPosition += 1 #to bypass the address version whose length is definitely 1
@ -2727,15 +2725,14 @@ class addressGenerator(QThread):
#we won't store the \x00 or \x00\x00 bytes thus making the address shorter. #we won't store the \x00 or \x00\x00 bytes thus making the address shorter.
startTime = time.time() startTime = time.time()
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix = 0 numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix = 0
potentialPrivSigningKey = OpenSSL.rand(32)
potentialPubSigningKey = self.pointMult(potentialPrivSigningKey)
while True: while True:
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix += 1 numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix += 1
potentialPrivSigningKey = OpenSSL.rand(32)
potentialPrivEncryptionKey = OpenSSL.rand(32) potentialPrivEncryptionKey = OpenSSL.rand(32)
potentialPubSigningKey = self.pointMult(potentialPrivSigningKey)
potentialPubEncryptionKey = self.pointMult(potentialPrivEncryptionKey) potentialPubEncryptionKey = self.pointMult(potentialPrivEncryptionKey)
#print 'potentialPubSigningKey', potentialPubSigningKey.encode('hex') #print 'potentialPubSigningKey', potentialPubSigningKey.encode('hex')
#print 'potentialPubEncryptionKey', potentialPubEncryptionKey.encode('hex') #print 'potentialPubEncryptionKey', potentialPubEncryptionKey.encode('hex')
ripe = hashlib.new('ripemd160') ripe = hashlib.new('ripemd160')
sha = hashlib.new('sha512') sha = hashlib.new('sha512')
sha.update(potentialPubSigningKey+potentialPubEncryptionKey) sha.update(potentialPubSigningKey+potentialPubEncryptionKey)