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class_singleWorker.py
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"""
Thread for performing PoW
"""
# pylint: disable=protected-access,too-many-branches,too-many-statements
# pylint: disable=no-self-use,too-many-lines,too-many-locals
from __future__ import division
import hashlib
import time
from binascii import hexlify, unhexlify
from struct import pack
from subprocess import call # nosec
import defaults
import helper_inbox
import helper_msgcoding
import helper_random
import helper_sql
import highlevelcrypto
import l10n
import proofofwork
import protocol
import queues
import shared
import state
import tr
from addresses import decodeAddress, decodeVarint, encodeVarint
from bmconfigparser import config
from helper_sql import sqlExecute, sqlQuery
from network import knownnodes, StoppableThread
from six.moves import configparser, queue
import six
def sizeof_fmt(num, suffix='h/s'):
"""Format hashes per seconds nicely (SI prefix)"""
for unit in ['', 'k', 'M', 'G', 'T', 'P', 'E', 'Z']:
if abs(num) < 1000.0:
return "%3.1f%s%s" % (num, unit, suffix)
num /= 1024.0
return "%.1f%s%s" % (num, 'Yi', suffix)
class singleWorker(StoppableThread):
"""Thread for performing PoW"""
def __init__(self):
super(singleWorker, self).__init__(name="singleWorker")
self.digestAlg = config.safeGet(
'bitmessagesettings', 'digestalg', 'sha256')
proofofwork.init()
def stopThread(self):
"""Signal through the queue that the thread should be stopped"""
try:
queues.workerQueue.put(("stopThread", "data"))
except queue.Full:
self.logger.error('workerQueue is Full')
super(singleWorker, self).stopThread()
def run(self):
# pylint: disable=attribute-defined-outside-init
while not helper_sql.sql_ready.wait(1.0) and state.shutdown == 0:
self.stop.wait(1.0)
if state.shutdown > 0:
return
# Initialize the neededPubkeys dictionary.
queryreturn = sqlQuery(
'''SELECT DISTINCT toaddress FROM sent'''
''' WHERE (status='awaitingpubkey' AND folder='sent')''')
for toAddress, in queryreturn:
toAddressVersionNumber, toStreamNumber, toRipe = \
decodeAddress(toAddress)[1:]
if toAddressVersionNumber <= 3:
state.neededPubkeys[toAddress] = 0
elif toAddressVersionNumber >= 4:
doubleHashOfAddressData = highlevelcrypto.double_sha512(
encodeVarint(toAddressVersionNumber)
+ encodeVarint(toStreamNumber) + toRipe
)
# Note that this is the first half of the sha512 hash.
privEncryptionKey = doubleHashOfAddressData[:32]
tag = doubleHashOfAddressData[32:]
# We'll need this for when we receive a pubkey reply:
# it will be encrypted and we'll need to decrypt it.
state.neededPubkeys[tag] = (
toAddress,
highlevelcrypto.makeCryptor(
hexlify(privEncryptionKey))
)
# Initialize the state.ackdataForWhichImWatching data structure
queryreturn = sqlQuery(
'''SELECT ackdata FROM sent WHERE status = 'msgsent' AND folder = 'sent' ''')
for row in queryreturn:
ackdata, = row
self.logger.info('Watching for ackdata %s', hexlify(ackdata))
state.ackdataForWhichImWatching[ackdata] = 0
# Fix legacy (headerless) watched ackdata to include header
for oldack in state.ackdataForWhichImWatching:
if len(oldack) == 32:
# attach legacy header, always constant (msg/1/1)
newack = '\x00\x00\x00\x02\x01\x01' + oldack
state.ackdataForWhichImWatching[newack] = 0
sqlExecute(
'''UPDATE sent SET ackdata=? WHERE ackdata=? AND folder = 'sent' ''',
newack, oldack
)
del state.ackdataForWhichImWatching[oldack]
# For the case if user deleted knownnodes
# but is still having onionpeer objects in inventory
if not knownnodes.knownNodesActual:
for item in state.Inventory.by_type_and_tag(protocol.OBJECT_ONIONPEER):
queues.objectProcessorQueue.put((
protocol.OBJECT_ONIONPEER, item.payload
))
# FIXME: should also delete from inventory
# give some time for the GUI to start
# before we start on existing POW tasks.
self.stop.wait(10)
if state.shutdown:
return
# just in case there are any pending tasks for msg
# messages that have yet to be sent.
queues.workerQueue.put(('sendmessage', ''))
# just in case there are any tasks for Broadcasts
# that have yet to be sent.
queues.workerQueue.put(('sendbroadcast', ''))
# send onionpeer object
queues.workerQueue.put(('sendOnionPeerObj', ''))
while state.shutdown == 0:
self.busy = 0
command, data = queues.workerQueue.get()
self.busy = 1
if command == 'sendmessage':
try:
self.sendMsg()
except: # noqa:E722
self.logger.warning("sendMsg didn't work")
elif command == 'sendbroadcast':
try:
self.sendBroadcast()
except: # noqa:E722
self.logger.warning("sendBroadcast didn't work")
elif command == 'doPOWForMyV2Pubkey':
try:
self.doPOWForMyV2Pubkey(data)
except: # noqa:E722
self.logger.warning("doPOWForMyV2Pubkey didn't work")
elif command == 'sendOutOrStoreMyV3Pubkey':
try:
self.sendOutOrStoreMyV3Pubkey(data)
except: # noqa:E722
self.logger.warning("sendOutOrStoreMyV3Pubkey didn't work")
elif command == 'sendOutOrStoreMyV4Pubkey':
try:
self.sendOutOrStoreMyV4Pubkey(data)
except: # noqa:E722
self.logger.warning("sendOutOrStoreMyV4Pubkey didn't work")
elif command == 'sendOnionPeerObj':
try:
self.sendOnionPeerObj(data)
except: # noqa:E722
self.logger.warning("sendOnionPeerObj didn't work")
elif command == 'resetPoW':
try:
proofofwork.resetPoW()
except: # noqa:E722
self.logger.warning("proofofwork.resetPoW didn't work")
elif command == 'stopThread':
self.busy = 0
return
else:
self.logger.error(
'Probable programming error: The command sent'
' to the workerThread is weird. It is: %s\n',
command
)
queues.workerQueue.task_done()
self.logger.info("Quitting...")
def _getKeysForAddress(self, address):
try:
privSigningKeyBase58 = config.get(address, 'privsigningkey')
privEncryptionKeyBase58 = config.get(address, 'privencryptionkey')
except (configparser.NoSectionError, configparser.NoOptionError):
self.logger.error(
'Could not read or decode privkey for address %s', address)
raise ValueError
privSigningKeyHex = hexlify(highlevelcrypto.decodeWalletImportFormat(
privSigningKeyBase58.encode()))
privEncryptionKeyHex = hexlify(
highlevelcrypto.decodeWalletImportFormat(
privEncryptionKeyBase58.encode()))
# 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.
pubSigningKey = unhexlify(highlevelcrypto.privToPub(
privSigningKeyHex))[1:]
pubEncryptionKey = unhexlify(highlevelcrypto.privToPub(
privEncryptionKeyHex))[1:]
return privSigningKeyHex, privEncryptionKeyHex, \
pubSigningKey, pubEncryptionKey
def _doPOWDefaults(self, payload, TTL,
log_prefix='',
log_time=False):
target = 2 ** 64 / (
defaults.networkDefaultProofOfWorkNonceTrialsPerByte * (
len(payload) + 8
+ defaults.networkDefaultPayloadLengthExtraBytes + ((
TTL * (
len(payload) + 8
+ defaults.networkDefaultPayloadLengthExtraBytes
)) / (2 ** 16))
))
initialHash = hashlib.sha512(payload).digest()
self.logger.info(
'%s Doing proof of work... TTL set to %s', log_prefix, TTL)
if log_time:
start_time = time.time()
trialValue, nonce = proofofwork.run(target, initialHash)
self.logger.info(
'%s Found proof of work %s Nonce: %s',
log_prefix, trialValue, nonce
)
try:
delta = time.time() - start_time
self.logger.info(
'PoW took %.1f seconds, speed %s.',
delta, sizeof_fmt(nonce / delta)
)
except: # noqa:E722 # NameError
self.logger.warning("Proof of Work exception")
payload = pack('>Q', nonce) + payload
return payload
def doPOWForMyV2Pubkey(self, adressHash):
""" This function also broadcasts out the pubkey
message once it is done with the POW"""
# Look up my stream number based on my address hash
myAddress = shared.myAddressesByHash[adressHash]
addressVersionNumber, streamNumber = decodeAddress(myAddress)[1:3]
# 28 days from now plus or minus five minutes
TTL = int(28 * 24 * 60 * 60 + helper_random.randomrandrange(-300, 300))
embeddedTime = int(time.time() + TTL)
payload = pack('>Q', (embeddedTime))
payload += '\x00\x00\x00\x01' # object type: pubkey
payload += encodeVarint(addressVersionNumber) # Address version number
payload += encodeVarint(streamNumber)
# bitfield of features supported by me (see the wiki).
payload += protocol.getBitfield(myAddress)
try:
pubSigningKey, pubEncryptionKey = self._getKeysForAddress(
myAddress)[2:]
except ValueError:
return
except Exception: # pylint:disable=broad-exception-caught
self.logger.error(
'Error within doPOWForMyV2Pubkey. Could not read'
' the keys from the keys.dat file for a requested'
' address. %s\n', exc_info=True)
return
payload += pubSigningKey + pubEncryptionKey
# Do the POW for this pubkey message
payload = self._doPOWDefaults(
payload, TTL, log_prefix='(For pubkey message)')
inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
objectType = 1
state.Inventory[inventoryHash] = (
objectType, streamNumber, payload, embeddedTime, '')
self.logger.info(
'broadcasting inv with hash: %s', hexlify(inventoryHash))
queues.invQueue.put((streamNumber, inventoryHash))
queues.UISignalQueue.put(('updateStatusBar', ''))
try:
config.set(
myAddress, 'lastpubkeysendtime', str(int(time.time())))
config.save()
except configparser.NoSectionError:
# The user deleted the address out of the keys.dat file
# before this finished.
pass
except: # noqa:E722
self.logger.warning("config.set didn't work")
def sendOutOrStoreMyV3Pubkey(self, adressHash):
"""
If this isn't a chan address, this function assembles the pubkey data, does the necessary POW and sends it out.
If it *is* a chan then it assembles the pubkey and stores is in the pubkey table so that we can send messages
to "ourselves".
"""
try:
myAddress = shared.myAddressesByHash[adressHash]
except KeyError:
self.logger.warning( # The address has been deleted.
"Can't find %s in myAddressByHash", hexlify(adressHash))
return
if config.safeGetBoolean(myAddress, 'chan'):
self.logger.info('This is a chan address. Not sending pubkey.')
return
_, addressVersionNumber, streamNumber, adressHash = decodeAddress(
myAddress)
# 28 days from now plus or minus five minutes
TTL = int(28 * 24 * 60 * 60 + helper_random.randomrandrange(-300, 300))
embeddedTime = int(time.time() + TTL)
# signedTimeForProtocolV2 = embeddedTime - TTL
# According to the protocol specification, the expiresTime
# along with the pubkey information is signed. But to be
# backwards compatible during the upgrade period, we shall sign
# not the expiresTime but rather the current time. There must be
# precisely a 28 day difference between the two. After the upgrade
# period we'll switch to signing the whole payload with the
# expiresTime time.
payload = pack('>Q', (embeddedTime))
payload += '\x00\x00\x00\x01' # object type: pubkey
payload += encodeVarint(addressVersionNumber) # Address version number
payload += encodeVarint(streamNumber)
# bitfield of features supported by me (see the wiki).
payload += protocol.getBitfield(myAddress)
try:
# , privEncryptionKeyHex
privSigningKeyHex, _, pubSigningKey, pubEncryptionKey = \
self._getKeysForAddress(myAddress)
except ValueError:
return
except Exception: # pylint:disable=broad-exception-caught
self.logger.error(
'Error within sendOutOrStoreMyV3Pubkey. Could not read'
' the keys from the keys.dat file for a requested'
' address. %s\n', exc_info=True)
return
payload += pubSigningKey + pubEncryptionKey
payload += encodeVarint(config.getint(
myAddress, 'noncetrialsperbyte'))
payload += encodeVarint(config.getint(
myAddress, 'payloadlengthextrabytes'))
signature = highlevelcrypto.sign(
payload, privSigningKeyHex, self.digestAlg)
payload += encodeVarint(len(signature))
payload += signature
# Do the POW for this pubkey message
payload = self._doPOWDefaults(
payload, TTL, log_prefix='(For pubkey message)')
inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
objectType = 1
state.Inventory[inventoryHash] = (
objectType, streamNumber, payload, embeddedTime, '')
self.logger.info(
'broadcasting inv with hash: %s', hexlify(inventoryHash))
queues.invQueue.put((streamNumber, inventoryHash))
queues.UISignalQueue.put(('updateStatusBar', ''))
try:
config.set(
myAddress, 'lastpubkeysendtime', str(int(time.time())))
config.save()
except configparser.NoSectionError:
# The user deleted the address out of the keys.dat file
# before this finished.
pass
except: # noqa:E722
self.logger.warning("BMConfigParser().set didn't work")
def sendOutOrStoreMyV4Pubkey(self, myAddress):
"""
It doesn't send directly anymore. It put is to a queue for another thread to send at an appropriate time,
whereas in the past it directly appended it to the outgoing buffer, I think. Same with all the other methods in
this class.
"""
if not config.has_section(myAddress):
# The address has been deleted.
return
if config.safeGetBoolean(myAddress, 'chan'):
self.logger.info('This is a chan address. Not sending pubkey.')
return
_, addressVersionNumber, streamNumber, addressHash = decodeAddress(
myAddress)
# 28 days from now plus or minus five minutes
TTL = int(28 * 24 * 60 * 60 + helper_random.randomrandrange(-300, 300))
embeddedTime = int(time.time() + TTL)
payload = pack('>Q', (embeddedTime))
payload += '\x00\x00\x00\x01' # object type: pubkey
payload += encodeVarint(addressVersionNumber) # Address version number
payload += encodeVarint(streamNumber)
dataToEncrypt = protocol.getBitfield(myAddress)
try:
# , privEncryptionKeyHex
privSigningKeyHex, _, pubSigningKey, pubEncryptionKey = \
self._getKeysForAddress(myAddress)
except ValueError:
return
except Exception: # pylint:disable=broad-exception-caught
self.logger.error(
'Error within sendOutOrStoreMyV4Pubkey. Could not read'
' the keys from the keys.dat file for a requested'
' address. %s\n', exc_info=True)
return
dataToEncrypt += pubSigningKey + pubEncryptionKey
dataToEncrypt += encodeVarint(config.getint(
myAddress, 'noncetrialsperbyte'))
dataToEncrypt += encodeVarint(config.getint(
myAddress, 'payloadlengthextrabytes'))
# When we encrypt, we'll use a hash of the data
# contained in an address as a decryption key. This way
# in order to read the public keys in a pubkey message,
# a node must know the address first. We'll also tag,
# unencrypted, the pubkey with part of the hash so that nodes
# know which pubkey object to try to decrypt
# when they want to send a message.
doubleHashOfAddressData = highlevelcrypto.double_sha512(
encodeVarint(addressVersionNumber)
+ encodeVarint(streamNumber) + addressHash
)
payload += doubleHashOfAddressData[32:] # the tag
signature = highlevelcrypto.sign(
payload + dataToEncrypt, privSigningKeyHex, self.digestAlg)
dataToEncrypt += encodeVarint(len(signature))
dataToEncrypt += signature
privEncryptionKey = doubleHashOfAddressData[:32]
pubEncryptionKey = highlevelcrypto.pointMult(privEncryptionKey)
payload += highlevelcrypto.encrypt(
dataToEncrypt, hexlify(pubEncryptionKey))
# Do the POW for this pubkey message
payload = self._doPOWDefaults(
payload, TTL, log_prefix='(For pubkey message)')
inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
objectType = 1
state.Inventory[inventoryHash] = (
objectType, streamNumber, payload, embeddedTime,
doubleHashOfAddressData[32:]
)
self.logger.info(
'broadcasting inv with hash: %s', hexlify(inventoryHash))
queues.invQueue.put((streamNumber, inventoryHash))
queues.UISignalQueue.put(('updateStatusBar', ''))
try:
config.set(
myAddress, 'lastpubkeysendtime', str(int(time.time())))
config.save()
except Exception as err:
self.logger.error(
'Error: Couldn\'t add the lastpubkeysendtime'
' to the keys.dat file. Error message: %s', err
)
def sendOnionPeerObj(self, peer=None):
"""Send onionpeer object representing peer"""
if not peer: # find own onionhostname
for peer in state.ownAddresses:
if peer.host.endswith('.onion'):
break
else:
return
TTL = int(7 * 24 * 60 * 60 + helper_random.randomrandrange(-300, 300))
embeddedTime = int(time.time() + TTL)
streamNumber = 1 # Don't know yet what should be here
objectType = protocol.OBJECT_ONIONPEER
# FIXME: ideally the objectPayload should be signed
objectPayload = encodeVarint(peer.port) + protocol.encodeHost(peer.host)
tag = highlevelcrypto.calculateInventoryHash(objectPayload)
if state.Inventory.by_type_and_tag(objectType, tag):
return # not expired
payload = pack('>Q', embeddedTime)
payload += pack('>I', objectType)
payload += encodeVarint(2 if len(peer.host) == 22 else 3)
payload += encodeVarint(streamNumber)
payload += objectPayload
payload = self._doPOWDefaults(
payload, TTL, log_prefix='(For onionpeer object)')
inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
if six.PY2:
payload_buffer = buffer(payload)
tag_buffer = buffer(tag)
else: # assume six.PY3
payload_buffer = memoryview(payload)
tag_buffer = memoryview(tag)
state.Inventory[inventoryHash] = (
objectType, streamNumber, payload_buffer, # noqa: F821
embeddedTime, tag_buffer # noqa: F821
)
self.logger.info(
'sending inv (within sendOnionPeerObj function) for object: %s',
hexlify(inventoryHash))
queues.invQueue.put((streamNumber, inventoryHash))
def sendBroadcast(self):
"""Send a broadcast-type object (assemble the object, perform PoW and put it to the inv announcement queue)"""
# Reset just in case
sqlExecute(
'''UPDATE sent SET status='broadcastqueued' '''
'''WHERE status = 'doingbroadcastpow' AND folder = 'sent' ''')
queryreturn = sqlQuery(
'''SELECT fromaddress, subject, message, '''
''' ackdata, ttl, encodingtype FROM sent '''
''' WHERE status=? and folder='sent' ''', 'broadcastqueued')
for row in queryreturn:
fromaddress, subject, body, ackdata, TTL, encoding = row
# status
_, addressVersionNumber, streamNumber, ripe = \
decodeAddress(fromaddress)
if addressVersionNumber <= 1:
self.logger.error(
'Error: In the singleWorker thread, the '
' sendBroadcast function doesn\'t understand'
' the address version.\n')
return
# We need to convert our private keys to public keys in order
# to include them.
try:
# , privEncryptionKeyHex
privSigningKeyHex, _, pubSigningKey, pubEncryptionKey = \
self._getKeysForAddress(fromaddress)
except ValueError:
queues.UISignalQueue.put((
'updateSentItemStatusByAckdata', (
ackdata,
tr._translate(
"MainWindow",
"Error! Could not find sender address"
" (your address) in the keys.dat file."))
))
continue
except Exception as err:
self.logger.error(
'Error within sendBroadcast. Could not read'
' the keys from the keys.dat file for a requested'
' address. %s\n', err
)
queues.UISignalQueue.put((
'updateSentItemStatusByAckdata', (
ackdata,
tr._translate(
"MainWindow",
"Error, can't send."))
))
continue
if not sqlExecute(
'''UPDATE sent SET status='doingbroadcastpow' '''
''' WHERE ackdata=? AND status='broadcastqueued' '''
''' AND folder='sent' ''',
ackdata):
continue
# At this time these pubkeys are 65 bytes long
# because they include the encoding byte which we won't
# be sending in the broadcast message.
# pubSigningKey = \
# highlevelcrypto.privToPub(privSigningKeyHex).decode('hex')
if TTL > 28 * 24 * 60 * 60:
TTL = 28 * 24 * 60 * 60
if TTL < 60 * 60:
TTL = 60 * 60
# add some randomness to the TTL
TTL = int(TTL + helper_random.randomrandrange(-300, 300))
embeddedTime = int(time.time() + TTL)
payload = pack('>Q', embeddedTime)
payload += '\x00\x00\x00\x03' # object type: broadcast
if addressVersionNumber <= 3:
payload += encodeVarint(4) # broadcast version
else:
payload += encodeVarint(5) # broadcast version
payload += encodeVarint(streamNumber)
if addressVersionNumber >= 4:
doubleHashOfAddressData = highlevelcrypto.double_sha512(
encodeVarint(addressVersionNumber)
+ encodeVarint(streamNumber) + ripe
)
tag = doubleHashOfAddressData[32:]
payload += tag
else:
tag = ''
dataToEncrypt = encodeVarint(addressVersionNumber)
dataToEncrypt += encodeVarint(streamNumber)
# behavior bitfield
dataToEncrypt += protocol.getBitfield(fromaddress)
dataToEncrypt += pubSigningKey + pubEncryptionKey
if addressVersionNumber >= 3:
dataToEncrypt += encodeVarint(config.getint(
fromaddress, 'noncetrialsperbyte'))
dataToEncrypt += encodeVarint(config.getint(
fromaddress, 'payloadlengthextrabytes'))
# message encoding type
dataToEncrypt += encodeVarint(encoding)
encodedMessage = helper_msgcoding.MsgEncode(
{"subject": subject, "body": body}, encoding)
dataToEncrypt += encodeVarint(encodedMessage.length)
dataToEncrypt += encodedMessage.data
dataToSign = payload + dataToEncrypt
signature = highlevelcrypto.sign(
dataToSign, privSigningKeyHex, self.digestAlg)
dataToEncrypt += encodeVarint(len(signature))
dataToEncrypt += signature
# Encrypt the broadcast with the information
# contained in the broadcaster's address.
# Anyone who knows the address can generate
# the private encryption key to decrypt the broadcast.
# This provides virtually no privacy; its purpose is to keep
# questionable and illegal content from flowing through the
# Internet connections and being stored on the disk of 3rd parties.
if addressVersionNumber <= 3:
privEncryptionKey = hashlib.sha512(
encodeVarint(addressVersionNumber)
+ encodeVarint(streamNumber) + ripe
).digest()[:32]
else:
privEncryptionKey = doubleHashOfAddressData[:32]
pubEncryptionKey = highlevelcrypto.pointMult(privEncryptionKey)
payload += highlevelcrypto.encrypt(
dataToEncrypt, hexlify(pubEncryptionKey))
queues.UISignalQueue.put((
'updateSentItemStatusByAckdata', (
ackdata,
tr._translate(
"MainWindow",
"Doing work necessary to send broadcast..."))
))
payload = self._doPOWDefaults(
payload, TTL, log_prefix='(For broadcast message)')
# Sanity check. The payload size should never be larger
# than 256 KiB. There should be checks elsewhere in the code
# to not let the user try to send a message this large
# until we implement message continuation.
if len(payload) > 2 ** 18: # 256 KiB
self.logger.critical(
'This broadcast object is too large to send.'
' This should never happen. Object size: %s',
len(payload)
)
continue
inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
objectType = 3
state.Inventory[inventoryHash] = (
objectType, streamNumber, payload, embeddedTime, tag)
self.logger.info(
'sending inv (within sendBroadcast function)'
' for object: %s',
hexlify(inventoryHash)
)
queues.invQueue.put((streamNumber, inventoryHash))
queues.UISignalQueue.put((
'updateSentItemStatusByAckdata', (
ackdata,
tr._translate(
"MainWindow",
"Broadcast sent on %1"
).arg(l10n.formatTimestamp()))
))
# Update the status of the message in the 'sent' table to have
# a 'broadcastsent' status
sqlExecute(
'''UPDATE sent SET msgid=?, status=?, lastactiontime=? '''
''' WHERE ackdata=? AND folder='sent' ''',
inventoryHash, 'broadcastsent', int(time.time()), ackdata
)
def sendMsg(self):
"""Send a message-type object (assemble the object, perform PoW and put it to the inv announcement queue)"""
# pylint: disable=too-many-nested-blocks
# Reset just in case
sqlExecute(
'''UPDATE sent SET status='msgqueued' '''
''' WHERE status IN ('doingpubkeypow', 'doingmsgpow') '''
''' AND folder='sent' ''')
queryreturn = sqlQuery(
'''SELECT toaddress, fromaddress, subject, message, '''
''' ackdata, status, ttl, retrynumber, encodingtype FROM '''
''' sent WHERE (status='msgqueued' or status='forcepow') '''
''' and folder='sent' ''')
# while we have a msg that needs some work
for row in queryreturn:
toaddress, fromaddress, subject, message, \
ackdata, status, TTL, retryNumber, encoding = row
# toStatus
_, toAddressVersionNumber, toStreamNumber, toRipe = \
decodeAddress(toaddress)
# fromStatus, , ,fromRipe
_, fromAddressVersionNumber, fromStreamNumber, _ = \
decodeAddress(fromaddress)
# We may or may not already have the pubkey
# for this toAddress. Let's check.
if status == 'forcepow':
# if the status of this msg is 'forcepow'
# then clearly we have the pubkey already
# because the user could not have overridden the message
# about the POW being too difficult without knowing
# the required difficulty.
pass
elif status == 'doingmsgpow':
# We wouldn't have set the status to doingmsgpow
# if we didn't already have the pubkey so let's assume
# that we have it.
pass
# If we are sending a message to ourselves or a chan
# then we won't need an entry in the pubkeys table;
# we can calculate the needed pubkey using the private keys
# in our keys.dat file.
elif config.has_section(toaddress):
if not sqlExecute(
'''UPDATE sent SET status='doingmsgpow' '''
''' WHERE toaddress=? AND status='msgqueued' AND folder='sent' ''',
toaddress
):
continue
status = 'doingmsgpow'
elif status == 'msgqueued':
# Let's see if we already have the pubkey in our pubkeys table
queryreturn = sqlQuery(
'''SELECT address FROM pubkeys WHERE address=?''',
toaddress
)
# If we have the needed pubkey in the pubkey table already,
if queryreturn != []:
# set the status of this msg to doingmsgpow
if not sqlExecute(
'''UPDATE sent SET status='doingmsgpow' '''
''' WHERE toaddress=? AND status='msgqueued' AND folder='sent' ''',
toaddress
):
continue
status = 'doingmsgpow'
# mark the pubkey as 'usedpersonally' so that
# we don't delete it later. If the pubkey version
# is >= 4 then usedpersonally will already be set
# to yes because we'll only ever have
# usedpersonally v4 pubkeys in the pubkeys table.
sqlExecute(
'''UPDATE pubkeys SET usedpersonally='yes' '''
''' WHERE address=?''',
toaddress
)
# We don't have the needed pubkey in the pubkeys table already.
else:
if toAddressVersionNumber <= 3:
toTag = ''
else:
toTag = highlevelcrypto.double_sha512(
encodeVarint(toAddressVersionNumber)
+ encodeVarint(toStreamNumber) + toRipe
)[32:]
if toaddress in state.neededPubkeys or \
toTag in state.neededPubkeys:
# We already sent a request for the pubkey
sqlExecute(
'''UPDATE sent SET status='awaitingpubkey', '''
''' sleeptill=? WHERE toaddress=? '''
''' AND status='msgqueued' ''',
int(time.time()) + 2.5 * 24 * 60 * 60,
toaddress
)
queues.UISignalQueue.put((
'updateSentItemStatusByToAddress', (
toaddress,
tr._translate(
"MainWindow",
"Encryption key was requested earlier."))
))
# on with the next msg on which we can do some work
continue
else:
# We have not yet sent a request for the pubkey
needToRequestPubkey = True
# If we are trying to send to address
# version >= 4 then the needed pubkey might be
# encrypted in the inventory.
# If we have it we'll need to decrypt it
# and put it in the pubkeys table.
# The decryptAndCheckPubkeyPayload function
# expects that the shared.neededPubkeys dictionary
# already contains the toAddress and cryptor
# object associated with the tag for this toAddress.
if toAddressVersionNumber >= 4:
doubleHashOfToAddressData = \
highlevelcrypto.double_sha512(
encodeVarint(toAddressVersionNumber)
+ encodeVarint(toStreamNumber) + toRipe
)
# The first half of the sha512 hash.
privEncryptionKey = doubleHashOfToAddressData[:32]
# The second half of the sha512 hash.
tag = doubleHashOfToAddressData[32:]
state.neededPubkeys[tag] = (
toaddress,
highlevelcrypto.makeCryptor(
hexlify(privEncryptionKey))
)
for value in state.Inventory.by_type_and_tag(1, toTag):
# if valid, this function also puts it
# in the pubkeys table.
if protocol.decryptAndCheckPubkeyPayload(
value.payload, toaddress
) == 'successful':
needToRequestPubkey = False
sqlExecute(
'''UPDATE sent SET '''
''' status='doingmsgpow', '''
''' retrynumber=0 WHERE '''
''' toaddress=? AND '''
''' (status='msgqueued' or '''
''' status='awaitingpubkey' or '''
''' status='doingpubkeypow') AND '''
''' folder='sent' ''',
toaddress)
del state.neededPubkeys[tag]
break
# else:
# There was something wrong with this
# pubkey object even though it had
# the correct tag- almost certainly
# because of malicious behavior or
# a badly programmed client. If there are
# any other pubkeys in our inventory
# with the correct tag then we'll try
# to decrypt those.
if needToRequestPubkey:
sqlExecute(
'''UPDATE sent SET '''
''' status='doingpubkeypow' WHERE '''
''' toaddress=? AND status='msgqueued' AND folder='sent' ''',
toaddress
)
queues.UISignalQueue.put((
'updateSentItemStatusByToAddress', (
toaddress,
tr._translate(
"MainWindow",
"Sending a request for the"
" recipient\'s encryption key."))
))
self.requestPubKey(toaddress)
# on with the next msg on which we can do some work
continue
# At this point we know that we have the necessary pubkey
# in the pubkeys table.
TTL *= 2**retryNumber
if TTL > 28 * 24 * 60 * 60:
TTL = 28 * 24 * 60 * 60
# add some randomness to the TTL
TTL = int(TTL + helper_random.randomrandrange(-300, 300))
embeddedTime = int(time.time() + TTL)
# if we aren't sending this to ourselves or a chan
if not config.has_section(toaddress):
state.ackdataForWhichImWatching[ackdata] = 0
queues.UISignalQueue.put((
'updateSentItemStatusByAckdata', (
ackdata,
tr._translate(
"MainWindow",
"Looking up the receiver\'s public key"))
))
self.logger.info('Sending a message.')
self.logger.debug(
'First 150 characters of message: %s',
repr(message[:150])
)
# Let us fetch the recipient's public key out of
# our database. If the required proof of work difficulty
# is too hard then we'll abort.
queryreturn = sqlQuery(
'SELECT transmitdata FROM pubkeys WHERE address=?',
toaddress)
for row in queryreturn: # pylint: disable=redefined-outer-name
pubkeyPayload, = row
# The pubkey message is stored with the following items
# all appended:
# -address version
# -stream number
# -behavior bitfield
# -pub signing key
# -pub encryption key
# -nonce trials per byte (if address version is >= 3)
# -length extra bytes (if address version is >= 3)
# to bypass the address version whose length is definitely 1
readPosition = 1
_, streamNumberLength = decodeVarint(
pubkeyPayload[readPosition:readPosition + 10])
readPosition += streamNumberLength
behaviorBitfield = pubkeyPayload[readPosition:readPosition + 4]
# Mobile users may ask us to include their address's
# RIPE hash on a message unencrypted. Before we actually
# do it the sending human must check a box
# in the settings menu to allow it.
# if receiver is a mobile device who expects that their
# address RIPE is included unencrypted on the front of
# the message..
if protocol.isBitSetWithinBitfield(behaviorBitfield, 30):
# if we are Not willing to include the receiver's
# RIPE hash on the message..
if not config.safeGetBoolean(
'bitmessagesettings', 'willinglysendtomobile'
):
self.logger.info(
'The receiver is a mobile user but the'
' sender (you) has not selected that you'
' are willing to send to mobiles. Aborting'
' send.'
)
queues.UISignalQueue.put((
'updateSentItemStatusByAckdata', (
ackdata,
tr._translate(
"MainWindow",
"Problem: Destination is a mobile"
" device who requests that the"
" destination be included in the"
" message but this is disallowed in"
" your settings. %1"
).arg(l10n.formatTimestamp()))
))
# if the human changes their setting and then
# sends another message or restarts their client,
# this one will send at that time.
continue
readPosition += 4 # to bypass the bitfield of behaviors
# We don't use this key for anything here.
# pubSigningKeyBase256 =
# pubkeyPayload[readPosition:readPosition+64]
readPosition += 64
pubEncryptionKeyBase256 = pubkeyPayload[
readPosition:readPosition + 64]
readPosition += 64
# Let us fetch the amount of work required by the recipient.
if toAddressVersionNumber == 2:
requiredAverageProofOfWorkNonceTrialsPerByte = \
defaults.networkDefaultProofOfWorkNonceTrialsPerByte
requiredPayloadLengthExtraBytes = \
defaults.networkDefaultPayloadLengthExtraBytes