Reference client for Bitmessage: a P2P encrypted decentralised communication protocol:
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import time
import threading
import hashlib
from binascii import hexlify
from pyelliptic import arithmetic
from pyelliptic.openssl import OpenSSL
import tr
import queues
import state
import shared
import defaults
import highlevelcrypto
from bmconfigparser import BMConfigParser
from debug import logger
from addresses import decodeAddress, encodeAddress, encodeVarint
from helper_threading import StoppableThread
class addressGenerator(threading.Thread, StoppableThread):
def __init__(self):
# QThread.__init__(self, parent)
threading.Thread.__init__(self, name="addressGenerator")
self.initStop()
def stopThread(self):
try:
queues.addressGeneratorQueue.put(("stopThread", "data"))
except:
pass
super(addressGenerator, self).stopThread()
def run(self):
while state.shutdown == 0:
queueValue = queues.addressGeneratorQueue.get()
nonceTrialsPerByte = 0
payloadLengthExtraBytes = 0
live = True
if queueValue[0] == 'createChan':
command, addressVersionNumber, streamNumber, label, \
deterministicPassphrase, live = queueValue
eighteenByteRipe = False
numberOfAddressesToMake = 1
numberOfNullBytesDemandedOnFrontOfRipeHash = 1
elif queueValue[0] == 'joinChan':
command, chanAddress, label, deterministicPassphrase, \
live = queueValue
eighteenByteRipe = False
addressVersionNumber = decodeAddress(chanAddress)[1]
streamNumber = decodeAddress(chanAddress)[2]
numberOfAddressesToMake = 1
numberOfNullBytesDemandedOnFrontOfRipeHash = 1
elif len(queueValue) == 7:
command, addressVersionNumber, streamNumber, label, \
numberOfAddressesToMake, deterministicPassphrase, \
eighteenByteRipe = queueValue
try:
numberOfNullBytesDemandedOnFrontOfRipeHash = \
BMConfigParser().getint(
'bitmessagesettings',
'numberofnullbytesonaddress'
)
except:
if eighteenByteRipe:
numberOfNullBytesDemandedOnFrontOfRipeHash = 2
else:
# the default
numberOfNullBytesDemandedOnFrontOfRipeHash = 1
elif len(queueValue) == 9:
command, addressVersionNumber, streamNumber, label, \
numberOfAddressesToMake, deterministicPassphrase, \
eighteenByteRipe, nonceTrialsPerByte, \
payloadLengthExtraBytes = queueValue
try:
numberOfNullBytesDemandedOnFrontOfRipeHash = \
BMConfigParser().getint(
'bitmessagesettings',
'numberofnullbytesonaddress'
)
except:
if eighteenByteRipe:
numberOfNullBytesDemandedOnFrontOfRipeHash = 2
else:
# the default
numberOfNullBytesDemandedOnFrontOfRipeHash = 1
elif queueValue[0] == 'stopThread':
break
else:
logger.error(
'Programming error: A structure with the wrong number'
' of values was passed into the addressGeneratorQueue.'
' Here is the queueValue: %r\n', queueValue)
if addressVersionNumber < 3 or addressVersionNumber > 4:
logger.error(
'Program error: For some reason the address generator'
' queue has been given a request to create at least'
' one version %s address which it cannot do.\n',
addressVersionNumber)
if nonceTrialsPerByte == 0:
nonceTrialsPerByte = BMConfigParser().getint(
'bitmessagesettings', 'defaultnoncetrialsperbyte')
if nonceTrialsPerByte < \
defaults.networkDefaultProofOfWorkNonceTrialsPerByte:
nonceTrialsPerByte = \
defaults.networkDefaultProofOfWorkNonceTrialsPerByte
if payloadLengthExtraBytes == 0:
payloadLengthExtraBytes = BMConfigParser().getint(
'bitmessagesettings', 'defaultpayloadlengthextrabytes')
if payloadLengthExtraBytes < \
defaults.networkDefaultPayloadLengthExtraBytes:
payloadLengthExtraBytes = \
defaults.networkDefaultPayloadLengthExtraBytes
if command == 'createRandomAddress':
queues.UISignalQueue.put((
'updateStatusBar',
tr._translate(
"MainWindow", "Generating one new address")
))
# This next section is a little bit strange. We're going
# to generate keys over and over until we find one
# that starts with either \x00 or \x00\x00. Then when
# we pack them into a Bitmessage address, we won't store
# the \x00 or \x00\x00 bytes thus making the address shorter.
startTime = time.time()
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix = 0
potentialPrivSigningKey = OpenSSL.rand(32)
potentialPubSigningKey = highlevelcrypto.pointMult(
potentialPrivSigningKey)
while True:
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix += 1
potentialPrivEncryptionKey = OpenSSL.rand(32)
potentialPubEncryptionKey = highlevelcrypto.pointMult(
potentialPrivEncryptionKey)
ripe = hashlib.new('ripemd160')
sha = hashlib.new('sha512')
sha.update(
potentialPubSigningKey + potentialPubEncryptionKey)
ripe.update(sha.digest())
if ripe.digest()[:numberOfNullBytesDemandedOnFrontOfRipeHash] == '\x00' * numberOfNullBytesDemandedOnFrontOfRipeHash:
break
logger.info(
'Generated address with ripe digest: %s',
hexlify(ripe.digest()))
try:
logger.info(
'Address generator calculated %s addresses at %s'
' addresses per second before finding one with'
' the correct ripe-prefix.',
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix,
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix
/ (time.time() - startTime))
except ZeroDivisionError:
# The user must have a pretty fast computer.
# time.time() - startTime equaled zero.
pass
address = encodeAddress(
addressVersionNumber, streamNumber, ripe.digest())
# An excellent way for us to store our keys
# is in Wallet Import Format. Let us convert now.
# https://en.bitcoin.it/wiki/Wallet_import_format
privSigningKey = '\x80' + potentialPrivSigningKey
checksum = hashlib.sha256(hashlib.sha256(
privSigningKey).digest()).digest()[0:4]
privSigningKeyWIF = arithmetic.changebase(
privSigningKey + checksum, 256, 58)
privEncryptionKey = '\x80' + potentialPrivEncryptionKey
checksum = hashlib.sha256(hashlib.sha256(
privEncryptionKey).digest()).digest()[0:4]
privEncryptionKeyWIF = arithmetic.changebase(
privEncryptionKey + checksum, 256, 58)
BMConfigParser().add_section(address)
BMConfigParser().set(address, 'label', label)
BMConfigParser().set(address, 'enabled', 'true')
BMConfigParser().set(address, 'decoy', 'false')
BMConfigParser().set(address, 'noncetrialsperbyte', str(
nonceTrialsPerByte))
BMConfigParser().set(address, 'payloadlengthextrabytes', str(
payloadLengthExtraBytes))
BMConfigParser().set(
address, 'privsigningkey', privSigningKeyWIF)
BMConfigParser().set(
address, 'privencryptionkey', privEncryptionKeyWIF)
BMConfigParser().save()
# The API and the join and create Chan functionality
# both need information back from the address generator.
queues.apiAddressGeneratorReturnQueue.put(address)
queues.UISignalQueue.put((
'updateStatusBar',
tr._translate(
"MainWindow",
"Done generating address. Doing work necessary"
" to broadcast it...")
))
queues.UISignalQueue.put(('writeNewAddressToTable', (
label, address, streamNumber)))
shared.reloadMyAddressHashes()
if addressVersionNumber == 3:
queues.workerQueue.put((
'sendOutOrStoreMyV3Pubkey', ripe.digest()))
elif addressVersionNumber == 4:
queues.workerQueue.put((
'sendOutOrStoreMyV4Pubkey', address))
elif command == 'createDeterministicAddresses' \
or command == 'getDeterministicAddress' \
or command == 'createChan' or command == 'joinChan':
if len(deterministicPassphrase) == 0:
logger.warning(
'You are creating deterministic'
' address(es) using a blank passphrase.'
' Bitmessage will do it but it is rather stupid.')
if command == 'createDeterministicAddresses':
queues.UISignalQueue.put((
'updateStatusBar',
tr._translate(
"MainWindow",
"Generating %1 new addresses."
).arg(str(numberOfAddressesToMake))
))
signingKeyNonce = 0
encryptionKeyNonce = 1
# We fill out this list no matter what although we only
# need it if we end up passing the info to the API.
listOfNewAddressesToSendOutThroughTheAPI = []
for _ in range(numberOfAddressesToMake):
# This next section is a little bit strange. We're
# going to generate keys over and over until we find
# one that has a RIPEMD hash that starts with either
# \x00 or \x00\x00. Then when we pack them into a
# Bitmessage address, we won't store the \x00 or
# \x00\x00 bytes thus making the address shorter.
startTime = time.time()
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix = 0
while True:
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix += 1
potentialPrivSigningKey = hashlib.sha512(
deterministicPassphrase +
encodeVarint(signingKeyNonce)
).digest()[:32]
potentialPrivEncryptionKey = hashlib.sha512(
deterministicPassphrase +
encodeVarint(encryptionKeyNonce)
).digest()[:32]
potentialPubSigningKey = highlevelcrypto.pointMult(
potentialPrivSigningKey)
potentialPubEncryptionKey = highlevelcrypto.pointMult(
potentialPrivEncryptionKey)
signingKeyNonce += 2
encryptionKeyNonce += 2
ripe = hashlib.new('ripemd160')
sha = hashlib.new('sha512')
sha.update(
potentialPubSigningKey + potentialPubEncryptionKey)
ripe.update(sha.digest())
if ripe.digest()[:numberOfNullBytesDemandedOnFrontOfRipeHash] == '\x00' * numberOfNullBytesDemandedOnFrontOfRipeHash:
break
logger.info(
'Generated address with ripe digest: %s',
hexlify(ripe.digest()))
try:
logger.info(
'Address generator calculated %s addresses'
' at %s addresses per second before finding'
' one with the correct ripe-prefix.',
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix,
numberOfAddressesWeHadToMakeBeforeWeFoundOneWithTheCorrectRipePrefix /
(time.time() - startTime)
)
except ZeroDivisionError:
# The user must have a pretty fast computer.
# time.time() - startTime equaled zero.
pass
address = encodeAddress(
addressVersionNumber, streamNumber, ripe.digest())
saveAddressToDisk = True
# If we are joining an existing chan, let us check
# to make sure it matches the provided Bitmessage address
if command == 'joinChan':
if address != chanAddress:
listOfNewAddressesToSendOutThroughTheAPI.append(
'chan name does not match address')
saveAddressToDisk = False
if command == 'getDeterministicAddress':
saveAddressToDisk = False
if saveAddressToDisk and live:
# An excellent way for us to store our keys is
# in Wallet Import Format. Let us convert now.
# https://en.bitcoin.it/wiki/Wallet_import_format
privSigningKey = '\x80' + potentialPrivSigningKey
checksum = hashlib.sha256(hashlib.sha256(
privSigningKey).digest()).digest()[0:4]
privSigningKeyWIF = arithmetic.changebase(
privSigningKey + checksum, 256, 58)
privEncryptionKey = '\x80' + \
potentialPrivEncryptionKey
checksum = hashlib.sha256(hashlib.sha256(
privEncryptionKey).digest()).digest()[0:4]
privEncryptionKeyWIF = arithmetic.changebase(
privEncryptionKey + checksum, 256, 58)
try:
BMConfigParser().add_section(address)
addressAlreadyExists = False
except:
addressAlreadyExists = True
if addressAlreadyExists:
logger.info(
'%s already exists. Not adding it again.',
address
)
queues.UISignalQueue.put((
'updateStatusBar',
tr._translate(
"MainWindow",
"%1 is already in 'Your Identities'."
" Not adding it again."
).arg(address)
))
else:
logger.debug('label: %s', label)
BMConfigParser().set(address, 'label', label)
BMConfigParser().set(address, 'enabled', 'true')
BMConfigParser().set(address, 'decoy', 'false')
if command == 'joinChan' \
or command == 'createChan':
BMConfigParser().set(address, 'chan', 'true')
BMConfigParser().set(
address, 'noncetrialsperbyte',
str(nonceTrialsPerByte))
BMConfigParser().set(
address, 'payloadlengthextrabytes',
str(payloadLengthExtraBytes))
BMConfigParser().set(
address, 'privSigningKey',
privSigningKeyWIF)
BMConfigParser().set(
address, 'privEncryptionKey',
privEncryptionKeyWIF)
BMConfigParser().save()
queues.UISignalQueue.put((
'writeNewAddressToTable',
(label, address, str(streamNumber))
))
listOfNewAddressesToSendOutThroughTheAPI.append(
address)
shared.myECCryptorObjects[ripe.digest()] = \
highlevelcrypto.makeCryptor(
hexlify(potentialPrivEncryptionKey))
shared.myAddressesByHash[ripe.digest()] = address
tag = hashlib.sha512(hashlib.sha512(
encodeVarint(addressVersionNumber) +
encodeVarint(streamNumber) + ripe.digest()
).digest()).digest()[32:]
shared.myAddressesByTag[tag] = address
if addressVersionNumber == 3:
# If this is a chan address,
# the worker thread won't send out
# the pubkey over the network.
queues.workerQueue.put((
'sendOutOrStoreMyV3Pubkey', ripe.digest()))
elif addressVersionNumber == 4:
queues.workerQueue.put((
'sendOutOrStoreMyV4Pubkey', address))
queues.UISignalQueue.put((
'updateStatusBar',
tr._translate(
"MainWindow", "Done generating address")
))
elif saveAddressToDisk and not live \
and not BMConfigParser().has_section(address):
listOfNewAddressesToSendOutThroughTheAPI.append(
address)
# Done generating addresses.
if command == 'createDeterministicAddresses' \
or command == 'joinChan' or command == 'createChan':
queues.apiAddressGeneratorReturnQueue.put(
listOfNewAddressesToSendOutThroughTheAPI)
elif command == 'getDeterministicAddress':
queues.apiAddressGeneratorReturnQueue.put(address)
else:
raise Exception(
"Error in the addressGenerator thread. Thread was" +
" given a command it could not understand: " + command)
queues.addressGeneratorQueue.task_done()