Exemplo n.º 1
0
def _checkAndShareGetpubkeyWithPeers(data):
    if len(data) < 42:
        logger.info('getpubkey message doesn\'t contain enough data. Ignoring.')
        return
    if len(data) > 200:
        logger.info('getpubkey is abnormally long. Sanity check failed. Ignoring object.')
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20  # bypass the nonce, time, and object type
    requestedAddressVersionNumber, addressVersionLength = decodeVarint(
        data[readPosition:readPosition + 10])
    readPosition += addressVersionLength
    streamNumber, streamNumberLength = decodeVarint(
        data[readPosition:readPosition + 10])
    if not streamNumber in state.streamsInWhichIAmParticipating:
        logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
        return
    readPosition += streamNumberLength

    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug('We have already received this getpubkey request. Ignoring it.')
        return

    objectType = 0
    Inventory()[inventoryHash] = (
        objectType, streamNumber, data, embeddedTime,'')
    # This getpubkey request is valid. Forward to peers.
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))

    # Now let's queue it to be processed ourselves.
    objectProcessorQueue.put((objectType,data))
Exemplo n.º 2
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def _checkAndSharePubkeyWithPeers(data):
    if len(data) < 146 or len(data) > 440:  # sanity check
        return
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20  # bypass the nonce, time, and object type
    addressVersion, varintLength = decodeVarint(
        data[readPosition:readPosition + 10])
    readPosition += varintLength
    streamNumber, varintLength = decodeVarint(data[readPosition:readPosition +
                                                   10])
    readPosition += varintLength
    if not streamNumber in state.streamsInWhichIAmParticipating:
        logger.debug('The streamNumber %s isn\'t one we are interested in.',
                     streamNumber)
        return
    if addressVersion >= 4:
        tag = data[readPosition:readPosition + 32]
        logger.debug('tag in received pubkey is: %s', hexlify(tag))
    else:
        tag = ''

    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug('We have already received this pubkey. Ignoring it.')
        return
    objectType = 1
    Inventory()[inventoryHash] = (objectType, streamNumber, data, embeddedTime,
                                  tag)
    # This object is valid. Forward it to peers.
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))

    # Now let's queue it to be processed ourselves.
    objectProcessorQueue.put((objectType, data))
Exemplo n.º 3
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def _checkAndSharePubkeyWithPeers(data):
    if len(data) < 146 or len(data) > 440:  # sanity check
        return
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20  # bypass the nonce, time, and object type
    addressVersion, varintLength = decodeVarint(
        data[readPosition:readPosition + 10])
    readPosition += varintLength
    streamNumber, varintLength = decodeVarint(
        data[readPosition:readPosition + 10])
    readPosition += varintLength
    if not streamNumber in state.streamsInWhichIAmParticipating:
        logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
        return
    if addressVersion >= 4:
        tag = data[readPosition:readPosition + 32]
        logger.debug('tag in received pubkey is: %s', hexlify(tag))
    else:
        tag = ''

    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug('We have already received this pubkey. Ignoring it.')
        return
    objectType = 1
    Inventory()[inventoryHash] = (
        objectType, streamNumber, data, embeddedTime, tag)
    # This object is valid. Forward it to peers.
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))


    # Now let's queue it to be processed ourselves.
    objectProcessorQueue.put((objectType,data))
Exemplo n.º 4
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def _checkAndShareUndefinedObjectWithPeers(data):
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20  # bypass nonce, time, and object type
    objectVersion, objectVersionLength = decodeVarint(
        data[readPosition:readPosition + 9])
    readPosition += objectVersionLength
    streamNumber, streamNumberLength = decodeVarint(
        data[readPosition:readPosition + 9])
    if streamNumber not in state.streamsInWhichIAmParticipating:
        logger.debug(
            'The streamNumber %i isn\'t one we are interested in.',
            streamNumber
        )
        return

    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug(
            'We have already received this undefined object. Ignoring.')
        return
    objectType, = unpack('>I', data[16:20])
    Inventory()[inventoryHash] = (
        objectType, streamNumber, data, embeddedTime, '')
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    protocol.broadcastToSendDataQueues(
        (streamNumber, 'advertiseobject', inventoryHash))
Exemplo n.º 5
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def _checkAndShareMsgWithPeers(data):
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20  # bypass nonce, time, and object type
    objectVersion, objectVersionLength = decodeVarint(
        data[readPosition:readPosition + 9])
    readPosition += objectVersionLength
    streamNumber, streamNumberLength = decodeVarint(
        data[readPosition:readPosition + 9])
    if not streamNumber in state.streamsInWhichIAmParticipating:
        logger.debug('The streamNumber %s isn\'t one we are interested in.',
                     streamNumber)
        return
    readPosition += streamNumberLength
    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug('We have already received this msg message. Ignoring.')
        return
    # This msg message is valid. Let's let our peers know about it.
    objectType = 2
    Inventory()[inventoryHash] = (objectType, streamNumber, data, embeddedTime,
                                  '')
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))

    # Now let's enqueue it to be processed ourselves.
    objectProcessorQueue.put((objectType, data))
Exemplo n.º 6
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def _checkAndShareGetpubkeyWithPeers(data):
    if len(data) < 42:
        logger.info(
            'getpubkey message doesn\'t contain enough data. Ignoring.')
        return
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20  # bypass the nonce, time, and object type
    requestedAddressVersionNumber, addressVersionLength = \
        decodeVarint(data[readPosition:readPosition + 10])
    readPosition += addressVersionLength
    streamNumber, streamNumberLength = \
        decodeVarint(data[readPosition:readPosition + 10])
    if streamNumber not in state.streamsInWhichIAmParticipating:
        logger.debug('The streamNumber %i isn\'t one we are interested in.',
                     streamNumber)
        return
    readPosition += streamNumberLength

    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug(
            'We have already received this getpubkey request. Ignoring it.')
        return

    objectType = 0
    Inventory()[inventoryHash] = (objectType, streamNumber, data, embeddedTime,
                                  '')
    # This getpubkey request is valid. Forward to peers.
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    protocol.broadcastToSendDataQueues(
        (streamNumber, 'advertiseobject', inventoryHash))

    # Now let's queue it to be processed ourselves.
    objectProcessorQueue.put((objectType, data))
Exemplo n.º 7
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def _checkAndShareBroadcastWithPeers(data):
    if len(data) < 180:
        logger.debug('The payload length of this broadcast packet is unreasonably low. Someone is probably trying funny business. Ignoring message.')
        return
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20  # bypass the nonce, time, and object type
    broadcastVersion, broadcastVersionLength = decodeVarint(
        data[readPosition:readPosition + 10])
    readPosition += broadcastVersionLength
    if broadcastVersion >= 2:
        streamNumber, streamNumberLength = decodeVarint(data[readPosition:readPosition + 10])
        readPosition += streamNumberLength
        if not streamNumber in state.streamsInWhichIAmParticipating:
            logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
            return
    if broadcastVersion >= 3:
        tag = data[readPosition:readPosition+32]
    else:
        tag = ''
    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug('We have already received this broadcast object. Ignoring.')
        return
    # It is valid. Let's let our peers know about it.
    objectType = 3
    Inventory()[inventoryHash] = (
        objectType, streamNumber, data, embeddedTime, tag)
    # This object is valid. Forward it to peers.
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))

    # Now let's queue it to be processed ourselves.
    objectProcessorQueue.put((objectType,data))
Exemplo n.º 8
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def _checkAndShareBroadcastWithPeers(data):
    if len(data) < 180:
        logger.debug('The payload length of this broadcast packet is unreasonably low. Someone is probably trying funny business. Ignoring message.')
        return
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20  # bypass the nonce, time, and object type
    broadcastVersion, broadcastVersionLength = decodeVarint(
        data[readPosition:readPosition + 10])
    readPosition += broadcastVersionLength
    if broadcastVersion >= 2:
        streamNumber, streamNumberLength = decodeVarint(data[readPosition:readPosition + 10])
        readPosition += streamNumberLength
        if not streamNumber in state.streamsInWhichIAmParticipating:
            logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
            return
    if broadcastVersion >= 3:
        tag = data[readPosition:readPosition+32]
    else:
        tag = ''
    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug('We have already received this broadcast object. Ignoring.')
        return
    # It is valid. Let's let our peers know about it.
    objectType = 3
    Inventory()[inventoryHash] = (
        objectType, streamNumber, data, embeddedTime, tag)
    # This object is valid. Forward it to peers.
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))

    # Now let's queue it to be processed ourselves.
    objectProcessorQueue.put((objectType,data))
Exemplo n.º 9
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def _checkAndShareMsgWithPeers(data):
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20 # bypass nonce, time, and object type
    objectVersion, objectVersionLength = decodeVarint(
        data[readPosition:readPosition + 9])
    readPosition += objectVersionLength
    streamNumber, streamNumberLength = decodeVarint(
        data[readPosition:readPosition + 9])
    if not streamNumber in state.streamsInWhichIAmParticipating:
        logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
        return
    readPosition += streamNumberLength
    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug('We have already received this msg message. Ignoring.')
        return
    # This msg message is valid. Let's let our peers know about it.
    objectType = 2
    Inventory()[inventoryHash] = (
        objectType, streamNumber, data, embeddedTime,'')
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))

    # Now let's enqueue it to be processed ourselves.
    objectProcessorQueue.put((objectType,data))
Exemplo n.º 10
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 def __init__(self, nonce, expiresTime, objectType, version, streamNumber, data, payloadOffset):
     self.nonce = nonce
     self.expiresTime = expiresTime
     self.objectType = objectType
     self.version = version
     self.streamNumber = streamNumber
     self.inventoryHash = calculateInventoryHash(data)
     # copy to avoid memory issues
     self.data = bytearray(data)
     self.tag = self.data[payloadOffset:payloadOffset+32]
Exemplo n.º 11
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 def __init__(self, nonce, expiresTime, objectType, version, streamNumber,
              data, payloadOffset):
     self.nonce = nonce
     self.expiresTime = expiresTime
     self.objectType = objectType
     self.version = version
     self.streamNumber = streamNumber
     self.inventoryHash = calculateInventoryHash(data)
     self.data = data
     self.tag = data[payloadOffset:payloadOffset + 32]
Exemplo n.º 12
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 def __init__(self, nonce, expiresTime, objectType, version, streamNumber, data, payloadOffset):
     self.nonce = nonce
     self.expiresTime = expiresTime
     self.objectType = objectType
     self.version = version
     self.streamNumber = streamNumber
     self.inventoryHash = calculateInventoryHash(data)
     # copy to avoid memory issues
     self.data = bytearray(data)
     self.tag = self.data[payloadOffset:payloadOffset+32]
Exemplo n.º 13
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 def HandleDisseminatePreEncryptedMsg(self, params):
     # The device issuing this command to PyBitmessage supplies a msg
     # object that has already been encrypted but which still needs the POW
     # to be done. PyBitmessage accepts this msg object and sends it out
     # to the rest of the Bitmessage network as if it had generated
     # the message itself. Please do not yet add this to the api doc.
     if len(params) != 3:
         raise APIError(0, 'I need 3 parameter!')
     encryptedPayload, requiredAverageProofOfWorkNonceTrialsPerByte, \
         requiredPayloadLengthExtraBytes = params
     encryptedPayload = self._decode(encryptedPayload, "hex")
     # Let us do the POW and attach it to the front
     target = 2**64 / (
         (len(encryptedPayload) + requiredPayloadLengthExtraBytes + 8) *
         requiredAverageProofOfWorkNonceTrialsPerByte)
     with shared.printLock:
         print(
             '(For msg message via API) Doing proof of work. Total required difficulty:',
             float(requiredAverageProofOfWorkNonceTrialsPerByte) /
             defaults.networkDefaultPayloadLengthExtraBytes,
             'Required small message difficulty:',
             float(requiredPayloadLengthExtraBytes) /
             defaults.networkDefaultPayloadLengthExtraBytes)
     powStartTime = time.time()
     initialHash = hashlib.sha512(encryptedPayload).digest()
     trialValue, nonce = proofofwork.run(target, initialHash)
     with shared.printLock:
         print('(For msg message via API) Found proof of work', trialValue,
               'Nonce:', nonce)
         try:
             print('POW took %d seconds. %d nonce trials per second.' %
                   (int(time.time() - powStartTime), nonce /
                    (time.time() - powStartTime)))
         except:
             pass
     encryptedPayload = pack('>Q', nonce) + encryptedPayload
     toStreamNumber = decodeVarint(encryptedPayload[16:26])[0]
     inventoryHash = calculateInventoryHash(encryptedPayload)
     objectType = 2
     TTL = 2.5 * 24 * 60 * 60
     Inventory()[inventoryHash] = (objectType,
                                   toStreamNumber, encryptedPayload,
                                   int(time.time()) + TTL, '')
     with shared.printLock:
         print(
             'Broadcasting inv for msg(API disseminatePreEncryptedMsg command):',
             hexlify(inventoryHash))
     queues.invQueue.put((toStreamNumber, inventoryHash))
Exemplo n.º 14
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 def recobject(self, data):
     self.messageProcessingStartTime = time.time()
     lengthOfTimeWeShouldUseToProcessThisMessage = shared.checkAndShareObjectWithPeers(data)
     self.downloadQueue.task_done(calculateInventoryHash(data))
     
     """
     Sleeping will help guarantee that we can process messages faster than a 
     remote node can send them. If we fall behind, the attacker could observe 
     that we are are slowing down the rate at which we request objects from the
     network which would indicate that we own a particular address (whichever
     one to which they are sending all of their attack messages). Note
     that if an attacker connects to a target with many connections, this
     mitigation mechanism might not be sufficient.
     """
     sleepTime = lengthOfTimeWeShouldUseToProcessThisMessage - (time.time() - self.messageProcessingStartTime)
     self._sleepForTimingAttackMitigation(sleepTime)
Exemplo n.º 15
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    def HandleDissimatePubKey(self, params):
        # The device issuing this command to PyBitmessage supplies a pubkey
        # object to be disseminated to the rest of the Bitmessage network.
        # PyBitmessage accepts this pubkey object and sends it out to the rest
        # of the Bitmessage network as if it had generated the pubkey object
        # itself. Please do not yet add this to the api doc.
        if len(params) != 1:
            raise APIError(0, 'I need 1 parameter!')
        payload, = params
        payload = self._decode(payload, "hex")

        # Let us do the POW
        target = 2**64 / (
            (len(payload) + defaults.networkDefaultPayloadLengthExtraBytes + 8)
            * defaults.networkDefaultPayloadLengthExtraBytes)
        print('(For pubkey message via API) Doing proof of work...')
        initialHash = hashlib.sha512(payload).digest()
        trialValue, nonce = proofofwork.run(target, initialHash)
        print('(For pubkey message via API) Found proof of work', trialValue,
              'Nonce:', nonce)
        payload = pack('>Q', nonce) + payload

        pubkeyReadPosition = 8  # bypass the nonce
        if payload[pubkeyReadPosition:pubkeyReadPosition+4] == \
                '\x00\x00\x00\x00':  # if this pubkey uses 8 byte time
            pubkeyReadPosition += 8
        else:
            pubkeyReadPosition += 4
        addressVersion, addressVersionLength = decodeVarint(
            payload[pubkeyReadPosition:pubkeyReadPosition + 10])
        pubkeyReadPosition += addressVersionLength
        pubkeyStreamNumber = decodeVarint(
            payload[pubkeyReadPosition:pubkeyReadPosition + 10])[0]
        inventoryHash = calculateInventoryHash(payload)
        objectType = 1  # TODO: support v4 pubkeys
        TTL = 28 * 24 * 60 * 60
        Inventory()[inventoryHash] = (objectType, pubkeyStreamNumber, payload,
                                      int(time.time()) + TTL, '')
        with shared.printLock:
            print(
                'broadcasting inv within API command disseminatePubkey with hash:',
                hexlify(inventoryHash))
        queues.invQueue.put((pubkeyStreamNumber, inventoryHash))
Exemplo n.º 16
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def _checkAndShareUndefinedObjectWithPeers(data):
    embeddedTime, = unpack('>Q', data[8:16])
    readPosition = 20 # bypass nonce, time, and object type
    objectVersion, objectVersionLength = decodeVarint(
        data[readPosition:readPosition + 9])
    readPosition += objectVersionLength
    streamNumber, streamNumberLength = decodeVarint(
        data[readPosition:readPosition + 9])
    if not streamNumber in state.streamsInWhichIAmParticipating:
        logger.debug('The streamNumber %s isn\'t one we are interested in.', streamNumber)
        return
    
    inventoryHash = calculateInventoryHash(data)
    if inventoryHash in Inventory():
        logger.debug('We have already received this undefined object. Ignoring.')
        return
    objectType, = unpack('>I', data[16:20])
    Inventory()[inventoryHash] = (
        objectType, streamNumber, data, embeddedTime,'')
    logger.debug('advertising inv with hash: %s', hexlify(inventoryHash))
    broadcastToSendDataQueues((streamNumber, 'advertiseobject', inventoryHash))
Exemplo n.º 17
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    def processmsg(self, data):
        messageProcessingStartTime = time.time()
        shared.numberOfMessagesProcessed += 1
        queues.UISignalQueue.put((
            'updateNumberOfMessagesProcessed', 'no data'))
        readPosition = 20 # bypass the nonce, time, and object type
        msgVersion, msgVersionLength = decodeVarint(data[readPosition:readPosition + 9])
        if msgVersion != 1:
            logger.info('Cannot understand message versions other than one. Ignoring message.') 
            return
        readPosition += msgVersionLength
        
        streamNumberAsClaimedByMsg, streamNumberAsClaimedByMsgLength = decodeVarint(
            data[readPosition:readPosition + 9])
        readPosition += streamNumberAsClaimedByMsgLength
        inventoryHash = calculateInventoryHash(data)
        initialDecryptionSuccessful = False

        # 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.
        
        for key, cryptorObject in shared.myECCryptorObjects.items():
            try:
                if initialDecryptionSuccessful: # continue decryption attempts to avoid timing attacks
                    cryptorObject.decrypt(data[readPosition:])
                else:
                    decryptedData = cryptorObject.decrypt(data[readPosition:])
                    toRipe = key  # This is the RIPE hash of my pubkeys. We need this below to compare to the destination_ripe included in the encrypted data.
                    initialDecryptionSuccessful = True
                    logger.info('EC decryption successful using key associated with ripe hash: %s.' % hexlify(key))
            except Exception as err:
                pass
        if not initialDecryptionSuccessful:
            # This is not a message bound for me.
            logger.info('Length of time program spent failing to decrypt this message: %s seconds.' % (time.time() - messageProcessingStartTime,)) 
            return

        # This is a message bound for me.
        toAddress = shared.myAddressesByHash[
            toRipe]  # Look up my address based on the RIPE hash.
        readPosition = 0
        sendersAddressVersionNumber, sendersAddressVersionNumberLength = decodeVarint(
            decryptedData[readPosition:readPosition + 10])
        readPosition += sendersAddressVersionNumberLength
        if sendersAddressVersionNumber == 0:
            logger.info('Cannot understand sendersAddressVersionNumber = 0. Ignoring message.') 
            return
        if sendersAddressVersionNumber > 4:
            logger.info('Sender\'s address version number %s not yet supported. Ignoring message.' % sendersAddressVersionNumber)  
            return
        if len(decryptedData) < 170:
            logger.info('Length of the unencrypted data is unreasonably short. Sanity check failed. Ignoring message.')
            return
        sendersStreamNumber, sendersStreamNumberLength = decodeVarint(
            decryptedData[readPosition:readPosition + 10])
        if sendersStreamNumber == 0:
            logger.info('sender\'s stream number is 0. Ignoring message.')
            return
        readPosition += sendersStreamNumberLength
        behaviorBitfield = decryptedData[readPosition:readPosition + 4]
        readPosition += 4
        pubSigningKey = '\x04' + decryptedData[
            readPosition:readPosition + 64]
        readPosition += 64
        pubEncryptionKey = '\x04' + decryptedData[
            readPosition:readPosition + 64]
        readPosition += 64
        if sendersAddressVersionNumber >= 3:
            requiredAverageProofOfWorkNonceTrialsPerByte, varintLength = decodeVarint(
                decryptedData[readPosition:readPosition + 10])
            readPosition += varintLength
            logger.info('sender\'s requiredAverageProofOfWorkNonceTrialsPerByte is %s' % requiredAverageProofOfWorkNonceTrialsPerByte)
            requiredPayloadLengthExtraBytes, varintLength = decodeVarint(
                decryptedData[readPosition:readPosition + 10])
            readPosition += varintLength
            logger.info('sender\'s requiredPayloadLengthExtraBytes is %s' % requiredPayloadLengthExtraBytes)
        endOfThePublicKeyPosition = readPosition  # needed for when we store the pubkey in our database of pubkeys for later use.
        if toRipe != decryptedData[readPosition:readPosition + 20]:
            logger.info('The original sender of this message did not send it to you. Someone is attempting a Surreptitious Forwarding Attack.\n\
                See: http://world.std.com/~dtd/sign_encrypt/sign_encrypt7.html \n\
                your toRipe: %s\n\
                embedded destination toRipe: %s' % (hexlify(toRipe), hexlify(decryptedData[readPosition:readPosition + 20]))
                       )
            return
        readPosition += 20
        messageEncodingType, messageEncodingTypeLength = decodeVarint(
            decryptedData[readPosition:readPosition + 10])
        readPosition += messageEncodingTypeLength
        messageLength, messageLengthLength = decodeVarint(
            decryptedData[readPosition:readPosition + 10])
        readPosition += messageLengthLength
        message = decryptedData[readPosition:readPosition + messageLength]
        # print 'First 150 characters of message:', repr(message[:150])
        readPosition += messageLength
        ackLength, ackLengthLength = decodeVarint(
            decryptedData[readPosition:readPosition + 10])
        readPosition += ackLengthLength
        ackData = decryptedData[readPosition:readPosition + ackLength]
        readPosition += ackLength
        positionOfBottomOfAckData = readPosition  # needed to mark the end of what is covered by the signature
        signatureLength, signatureLengthLength = decodeVarint(
            decryptedData[readPosition:readPosition + 10])
        readPosition += signatureLengthLength
        signature = decryptedData[
            readPosition:readPosition + signatureLength]
        signedData = data[8:20] + encodeVarint(1) + encodeVarint(streamNumberAsClaimedByMsg) + decryptedData[:positionOfBottomOfAckData]
        
        if not highlevelcrypto.verify(signedData, signature, hexlify(pubSigningKey)):
            logger.debug('ECDSA verify failed')
            return
        logger.debug('ECDSA verify passed')
        sigHash = hashlib.sha512(hashlib.sha512(signature).digest()).digest()[32:] # Used to detect and ignore duplicate messages in our inbox

        # calculate the fromRipe.
        sha = hashlib.new('sha512')
        sha.update(pubSigningKey + pubEncryptionKey)
        ripe = hashlib.new('ripemd160')
        ripe.update(sha.digest())
        fromAddress = encodeAddress(
            sendersAddressVersionNumber, sendersStreamNumber, ripe.digest())
        
        # Let's store the public key in case we want to reply to this
        # person.
        sqlExecute(
            '''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
            fromAddress,
            sendersAddressVersionNumber,
            decryptedData[:endOfThePublicKeyPosition],
            int(time.time()),
            'yes')
        
        # 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.
        self.possibleNewPubkey(fromAddress)
        
        # 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 this is bound for one of my chan
        # addresses then we skip this check; the minimum network POW is
        # fine.
        if decodeAddress(toAddress)[1] >= 3 and not BMConfigParser().safeGetBoolean(toAddress, 'chan'):  # If the toAddress version number is 3 or higher and not one of my chan addresses:
            if not shared.isAddressInMyAddressBookSubscriptionsListOrWhitelist(fromAddress):  # If I'm not friendly with this person:
                requiredNonceTrialsPerByte = BMConfigParser().getint(
                    toAddress, 'noncetrialsperbyte')
                requiredPayloadLengthExtraBytes = BMConfigParser().getint(
                    toAddress, 'payloadlengthextrabytes')
                if not protocol.isProofOfWorkSufficient(data, requiredNonceTrialsPerByte, requiredPayloadLengthExtraBytes):
                    logger.info('Proof of work in msg is 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 BMConfigParser().get('bitmessagesettings', 'blackwhitelist') == 'black':  # If we are using a blacklist
            queryreturn = sqlQuery(
                '''SELECT label FROM blacklist where address=? and enabled='1' ''',
                fromAddress)
            if queryreturn != []:
                logger.info('Message ignored because address is in blacklist.')

                blockMessage = True
        else:  # We're using a whitelist
            queryreturn = sqlQuery(
                '''SELECT label FROM whitelist where address=? and enabled='1' ''',
                fromAddress)
            if queryreturn == []:
                logger.info('Message ignored because address not in whitelist.')
                blockMessage = True

        toLabel = BMConfigParser().get(toAddress, 'label')
        if toLabel == '':
            toLabel = toAddress

        decodedMessage = helper_msgcoding.MsgDecode(messageEncodingType, message)
        subject = decodedMessage.subject
        body = decodedMessage.body

        # Let us make sure that we haven't already received this message
        if helper_inbox.isMessageAlreadyInInbox(sigHash):
            logger.info('This msg is already in our inbox. Ignoring it.')
            blockMessage = True
        if not blockMessage:
            if messageEncodingType != 0:
                t = (inventoryHash, toAddress, fromAddress, subject, int(
                    time.time()), body, 'inbox', messageEncodingType, 0, sigHash)
                helper_inbox.insert(t)

                queues.UISignalQueue.put(('displayNewInboxMessage', (
                    inventoryHash, toAddress, fromAddress, subject, body)))

            # If we are behaving as an API then we might need to run an
            # outside command to let some program know that a new message
            # has arrived.
            if BMConfigParser().safeGetBoolean('bitmessagesettings', 'apienabled'):
                try:
                    apiNotifyPath = BMConfigParser().get(
                        'bitmessagesettings', 'apinotifypath')
                except:
                    apiNotifyPath = ''
                if apiNotifyPath != '':
                    call([apiNotifyPath, "newMessage"])

            # Let us now check and see whether our receiving address is
            # behaving as a mailing list
            if BMConfigParser().safeGetBoolean(toAddress, 'mailinglist') and messageEncodingType != 0:
                try:
                    mailingListName = BMConfigParser().get(
                        toAddress, 'mailinglistname')
                except:
                    mailingListName = ''
                # Let us send out this message as a broadcast
                subject = self.addMailingListNameToSubject(
                    subject, mailingListName)
                # Let us now send this message out as a broadcast
                message = time.strftime("%a, %Y-%m-%d %H:%M:%S UTC", time.gmtime(
                )) + '   Message ostensibly from ' + fromAddress + ':\n\n' + body
                fromAddress = toAddress  # The fromAddress for the broadcast that we are about to send is the toAddress (my address) for the msg message we are currently processing.
                ackdataForBroadcast = OpenSSL.rand(
                    32)  # We don't actually need the ackdataForBroadcast for acknowledgement since this is a broadcast message but we can use it to update the user interface when the POW is done generating.
                toAddress = '[Broadcast subscribers]'
                ripe = ''

                # We really should have a discussion about how to
                # set the TTL for mailing list broadcasts. This is obviously
                # hard-coded. 
                TTL = 2*7*24*60*60 # 2 weeks
                t = ('', 
                     toAddress, 
                     ripe, 
                     fromAddress, 
                     subject, 
                     message, 
                     ackdataForBroadcast, 
                     int(time.time()), # sentTime (this doesn't change)
                     int(time.time()), # lastActionTime
                     0, 
                     'broadcastqueued', 
                     0, 
                     'sent', 
                     messageEncodingType, 
                     TTL)
                helper_sent.insert(t)

                queues.UISignalQueue.put(('displayNewSentMessage', (
                    toAddress, '[Broadcast subscribers]', fromAddress, subject, message, ackdataForBroadcast)))
                queues.workerQueue.put(('sendbroadcast', ''))

        # Don't send ACK if invalid, blacklisted senders, invisible messages, disabled or chan
        if self.ackDataHasAValidHeader(ackData) and \
            not blockMessage and \
            messageEncodingType != 0 and \
            not BMConfigParser().safeGetBoolean(toAddress, 'dontsendack') and \
            not BMConfigParser().safeGetBoolean(toAddress, 'chan'):
            shared.checkAndShareObjectWithPeers(ackData[24:])

        # Display timing data
        timeRequiredToAttemptToDecryptMessage = time.time(
        ) - messageProcessingStartTime
        shared.successfullyDecryptMessageTimings.append(
            timeRequiredToAttemptToDecryptMessage)
        sum = 0
        for item in shared.successfullyDecryptMessageTimings:
            sum += item
        logger.debug('Time to decrypt this message successfully: %s\n\
                     Average time for all message decryption successes since startup: %s.' %
                     (timeRequiredToAttemptToDecryptMessage, sum / len(shared.successfullyDecryptMessageTimings)) 
                     )
Exemplo n.º 18
0
    def processbroadcast(self, data):
        messageProcessingStartTime = time.time()
        shared.numberOfBroadcastsProcessed += 1
        queues.UISignalQueue.put((
            'updateNumberOfBroadcastsProcessed', 'no data'))
        inventoryHash = calculateInventoryHash(data)
        readPosition = 20  # bypass the nonce, time, and object type
        broadcastVersion, broadcastVersionLength = decodeVarint(
            data[readPosition:readPosition + 9])
        readPosition += broadcastVersionLength
        if broadcastVersion < 4 or broadcastVersion > 5:
            logger.info('Cannot decode incoming broadcast versions less than 4 or higher than 5. Assuming the sender isn\'t being silly, you should upgrade Bitmessage because this message shall be ignored.') 
            return
        cleartextStreamNumber, cleartextStreamNumberLength = decodeVarint(
            data[readPosition:readPosition + 10])
        readPosition += cleartextStreamNumberLength
        if broadcastVersion == 4:
            """
            v4 broadcasts are encrypted the same way the msgs are encrypted. To see if we are interested in a
            v4 broadcast, we try to decrypt it. This was replaced with v5 broadcasts which include a tag which 
            we check instead, just like we do with v4 pubkeys. 
            """
            signedData = data[8:readPosition]
            initialDecryptionSuccessful = False
            for key, cryptorObject in shared.MyECSubscriptionCryptorObjects.items():
                try:
                    if initialDecryptionSuccessful: # continue decryption attempts to avoid timing attacks
                        cryptorObject.decrypt(data[readPosition:])
                    else:
                        decryptedData = cryptorObject.decrypt(data[readPosition:])
                        toRipe = key  # This is the RIPE hash of the sender's pubkey. We need this below to compare to the RIPE hash of the sender's address to verify that it was encrypted by with their key rather than some other key.
                        initialDecryptionSuccessful = True
                        logger.info('EC decryption successful using key associated with ripe hash: %s' % hexlify(key))
                except Exception as err:
                    pass
                    # print 'cryptorObject.decrypt Exception:', err
            if not initialDecryptionSuccessful:
                # This is not a broadcast I am interested in.
                logger.debug('Length of time program spent failing to decrypt this v4 broadcast: %s seconds.' % (time.time() - messageProcessingStartTime,))
                return
        elif broadcastVersion == 5:
            embeddedTag = data[readPosition:readPosition+32]
            readPosition += 32
            if embeddedTag not in shared.MyECSubscriptionCryptorObjects:
                logger.debug('We\'re not interested in this broadcast.') 
                return
            # We are interested in this broadcast because of its tag.
            signedData = data[8:readPosition] # We're going to add some more data which is signed further down.
            cryptorObject = shared.MyECSubscriptionCryptorObjects[embeddedTag]
            try:
                decryptedData = cryptorObject.decrypt(data[readPosition:])
                logger.debug('EC decryption successful')
            except Exception as err:
                logger.debug('Broadcast version %s decryption Unsuccessful.' % broadcastVersion) 
                return
        # At this point this is a broadcast I have decrypted and am
        # interested in.
        readPosition = 0
        sendersAddressVersion, sendersAddressVersionLength = decodeVarint(
            decryptedData[readPosition:readPosition + 9])
        if broadcastVersion == 4:
            if sendersAddressVersion < 2 or sendersAddressVersion > 3:
                logger.warning('Cannot decode senderAddressVersion other than 2 or 3. Assuming the sender isn\'t being silly, you should upgrade Bitmessage because this message shall be ignored.')
                return
        elif broadcastVersion == 5:
            if sendersAddressVersion < 4:
                logger.info('Cannot decode senderAddressVersion less than 4 for broadcast version number 5. Assuming the sender isn\'t being silly, you should upgrade Bitmessage because this message shall be ignored.') 
                return
        readPosition += sendersAddressVersionLength
        sendersStream, sendersStreamLength = decodeVarint(
            decryptedData[readPosition:readPosition + 9])
        if sendersStream != cleartextStreamNumber:
            logger.info('The stream number outside of the encryption on which the POW was completed doesn\'t match the stream number inside the encryption. Ignoring broadcast.') 
            return
        readPosition += sendersStreamLength
        behaviorBitfield = decryptedData[readPosition:readPosition + 4]
        readPosition += 4
        sendersPubSigningKey = '\x04' + \
            decryptedData[readPosition:readPosition + 64]
        readPosition += 64
        sendersPubEncryptionKey = '\x04' + \
            decryptedData[readPosition:readPosition + 64]
        readPosition += 64
        if sendersAddressVersion >= 3:
            requiredAverageProofOfWorkNonceTrialsPerByte, varintLength = decodeVarint(
                decryptedData[readPosition:readPosition + 10])
            readPosition += varintLength
            logger.debug('sender\'s requiredAverageProofOfWorkNonceTrialsPerByte is %s' % requiredAverageProofOfWorkNonceTrialsPerByte)
            requiredPayloadLengthExtraBytes, varintLength = decodeVarint(
                decryptedData[readPosition:readPosition + 10])
            readPosition += varintLength
            logger.debug('sender\'s requiredPayloadLengthExtraBytes is %s' % requiredPayloadLengthExtraBytes)
        endOfPubkeyPosition = readPosition

        sha = hashlib.new('sha512')
        sha.update(sendersPubSigningKey + sendersPubEncryptionKey)
        ripeHasher = hashlib.new('ripemd160')
        ripeHasher.update(sha.digest())
        calculatedRipe = ripeHasher.digest()

        if broadcastVersion == 4:
            if toRipe != calculatedRipe:
                logger.info('The encryption key used to encrypt this message doesn\'t match the keys inbedded in the message itself. Ignoring message.') 
                return
        elif broadcastVersion == 5:
            calculatedTag = hashlib.sha512(hashlib.sha512(encodeVarint(
                sendersAddressVersion) + encodeVarint(sendersStream) + calculatedRipe).digest()).digest()[32:]
            if calculatedTag != embeddedTag:
                logger.debug('The tag and encryption key used to encrypt this message doesn\'t match the keys inbedded in the message itself. Ignoring message.') 
                return
        messageEncodingType, messageEncodingTypeLength = decodeVarint(
            decryptedData[readPosition:readPosition + 9])
        if messageEncodingType == 0:
            return
        readPosition += messageEncodingTypeLength
        messageLength, messageLengthLength = decodeVarint(
            decryptedData[readPosition:readPosition + 9])
        readPosition += messageLengthLength
        message = decryptedData[readPosition:readPosition + messageLength]
        readPosition += messageLength
        readPositionAtBottomOfMessage = readPosition
        signatureLength, signatureLengthLength = decodeVarint(
            decryptedData[readPosition:readPosition + 9])
        readPosition += signatureLengthLength
        signature = decryptedData[
            readPosition:readPosition + signatureLength]
        signedData += decryptedData[:readPositionAtBottomOfMessage]
        if not highlevelcrypto.verify(signedData, signature, hexlify(sendersPubSigningKey)):
            logger.debug('ECDSA verify failed')
            return
        logger.debug('ECDSA verify passed')
        sigHash = hashlib.sha512(hashlib.sha512(signature).digest()).digest()[32:] # Used to detect and ignore duplicate messages in our inbox

        fromAddress = encodeAddress(
            sendersAddressVersion, sendersStream, calculatedRipe)
        logger.info('fromAddress: %s' % fromAddress)

        # Let's store the public key in case we want to reply to this person.
        sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
                   fromAddress,
                   sendersAddressVersion,
                   decryptedData[:endOfPubkeyPosition],
                   int(time.time()),
                   'yes')

        # 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.
        self.possibleNewPubkey(fromAddress)

        fromAddress = encodeAddress(
            sendersAddressVersion, sendersStream, calculatedRipe)
        logger.debug('fromAddress: ' + fromAddress)

        decodedMessage = helper_msgcoding.MsgDecode(messageEncodingType, message)
        subject = decodedMessage.subject
        body = decodedMessage.body

        toAddress = '[Broadcast subscribers]'
        if helper_inbox.isMessageAlreadyInInbox(sigHash):
            logger.info('This broadcast is already in our inbox. Ignoring it.')
            return
        t = (inventoryHash, toAddress, fromAddress, subject, int(
            time.time()), body, 'inbox', messageEncodingType, 0, sigHash)
        helper_inbox.insert(t)

        queues.UISignalQueue.put(('displayNewInboxMessage', (
            inventoryHash, toAddress, fromAddress, subject, body)))

        # If we are behaving as an API then we might need to run an
        # outside command to let some program know that a new message
        # has arrived.
        if BMConfigParser().safeGetBoolean('bitmessagesettings', 'apienabled'):
            try:
                apiNotifyPath = BMConfigParser().get(
                    'bitmessagesettings', 'apinotifypath')
            except:
                apiNotifyPath = ''
            if apiNotifyPath != '':
                call([apiNotifyPath, "newBroadcast"])

        # Display timing data
        logger.info('Time spent processing this interesting broadcast: %s' % (time.time() - messageProcessingStartTime,))
Exemplo n.º 19
0
    def _handle_request(self, method, params):
        if method == 'helloWorld':
            (a, b) = params
            return a + '-' + b
        elif method == 'add':
            (a, b) = params
            return a + b
        elif method == 'statusBar':
            message, = params
            shared.UISignalQueue.put(('updateStatusBar', message))
        elif method == 'listAddresses' or method == 'listAddresses2':
            data = '{"addresses":['
            configSections = shared.config.sections()
            for addressInKeysFile in configSections:
                if addressInKeysFile != 'bitmessagesettings':
                    status, addressVersionNumber, streamNumber, hash01 = decodeAddress(
                        addressInKeysFile)
                    if len(data) > 20:
                        data += ','
                    if shared.config.has_option(addressInKeysFile, 'chan'):
                        chan = shared.config.getboolean(addressInKeysFile, 'chan')
                    else:
                        chan = False
                    label = shared.config.get(addressInKeysFile, 'label')
                    if method == 'listAddresses2':
                        label = label.encode('base64')
                    data += json.dumps({'label': label, 'address': addressInKeysFile, 'stream':
                                        streamNumber, 'enabled': shared.config.getboolean(addressInKeysFile, 'enabled'), 'chan': chan}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'listAddressBookEntries' or method == 'listAddressbook': # the listAddressbook alias should be removed eventually.
            queryreturn = sqlQuery('''SELECT label, address from addressbook''')
            data = '{"addresses":['
            for row in queryreturn:
                label, address = row
                label = shared.fixPotentiallyInvalidUTF8Data(label)
                if len(data) > 20:
                    data += ','
                data += json.dumps({'label':label.encode('base64'), 'address': address}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'addAddressBookEntry' or method == 'addAddressbook': # the addAddressbook alias should be deleted eventually.
            if len(params) != 2:
                raise APIError(0, "I need label and address")
            address, label = params
            label = self._decode(label, "base64")
            address = addBMIfNotPresent(address)
            self._verifyAddress(address)
            queryreturn = sqlQuery("SELECT address FROM addressbook WHERE address=?", address)
            if queryreturn != []:
                raise APIError(16, 'You already have this address in your address book.')

            sqlExecute("INSERT INTO addressbook VALUES(?,?)", label, address)
            shared.UISignalQueue.put(('rerenderInboxFromLabels',''))
            shared.UISignalQueue.put(('rerenderSentToLabels',''))
            shared.UISignalQueue.put(('rerenderAddressBook',''))
            return "Added address %s to address book" % address
        elif method == 'deleteAddressBookEntry' or method == 'deleteAddressbook': # The deleteAddressbook alias should be deleted eventually.
            if len(params) != 1:
                raise APIError(0, "I need an address")
            address, = params
            address = addBMIfNotPresent(address)
            self._verifyAddress(address)
            sqlExecute('DELETE FROM addressbook WHERE address=?', address)
            shared.UISignalQueue.put(('rerenderInboxFromLabels',''))
            shared.UISignalQueue.put(('rerenderSentToLabels',''))
            shared.UISignalQueue.put(('rerenderAddressBook',''))
            return "Deleted address book entry for %s if it existed" % address
        elif method == 'createRandomAddress':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            elif len(params) == 1:
                label, = params
                eighteenByteRipe = False
                nonceTrialsPerByte = shared.config.get(
                    'bitmessagesettings', 'defaultnoncetrialsperbyte')
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 2:
                label, eighteenByteRipe = params
                nonceTrialsPerByte = shared.config.get(
                    'bitmessagesettings', 'defaultnoncetrialsperbyte')
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 3:
                label, eighteenByteRipe, totalDifficulty = params
                nonceTrialsPerByte = int(
                    shared.networkDefaultProofOfWorkNonceTrialsPerByte * totalDifficulty)
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 4:
                label, eighteenByteRipe, totalDifficulty, smallMessageDifficulty = params
                nonceTrialsPerByte = int(
                    shared.networkDefaultProofOfWorkNonceTrialsPerByte * totalDifficulty)
                payloadLengthExtraBytes = int(
                    shared.networkDefaultPayloadLengthExtraBytes * smallMessageDifficulty)
            else:
                raise APIError(0, 'Too many parameters!')
            label = self._decode(label, "base64")
            try:
                unicode(label, 'utf-8')
            except:
                raise APIError(17, 'Label is not valid UTF-8 data.')
            shared.apiAddressGeneratorReturnQueue.queue.clear()
            streamNumberForAddress = 1
            shared.addressGeneratorQueue.put((
                'createRandomAddress', 4, streamNumberForAddress, label, 1, "", eighteenByteRipe, nonceTrialsPerByte, payloadLengthExtraBytes))
            return shared.apiAddressGeneratorReturnQueue.get()
        elif method == 'createDeterministicAddresses':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            elif len(params) == 1:
                passphrase, = params
                numberOfAddresses = 1
                addressVersionNumber = 0
                streamNumber = 0
                eighteenByteRipe = False
                nonceTrialsPerByte = shared.config.get(
                    'bitmessagesettings', 'defaultnoncetrialsperbyte')
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 2:
                passphrase, numberOfAddresses = params
                addressVersionNumber = 0
                streamNumber = 0
                eighteenByteRipe = False
                nonceTrialsPerByte = shared.config.get(
                    'bitmessagesettings', 'defaultnoncetrialsperbyte')
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 3:
                passphrase, numberOfAddresses, addressVersionNumber = params
                streamNumber = 0
                eighteenByteRipe = False
                nonceTrialsPerByte = shared.config.get(
                    'bitmessagesettings', 'defaultnoncetrialsperbyte')
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 4:
                passphrase, numberOfAddresses, addressVersionNumber, streamNumber = params
                eighteenByteRipe = False
                nonceTrialsPerByte = shared.config.get(
                    'bitmessagesettings', 'defaultnoncetrialsperbyte')
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 5:
                passphrase, numberOfAddresses, addressVersionNumber, streamNumber, eighteenByteRipe = params
                nonceTrialsPerByte = shared.config.get(
                    'bitmessagesettings', 'defaultnoncetrialsperbyte')
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 6:
                passphrase, numberOfAddresses, addressVersionNumber, streamNumber, eighteenByteRipe, totalDifficulty = params
                nonceTrialsPerByte = int(
                    shared.networkDefaultProofOfWorkNonceTrialsPerByte * totalDifficulty)
                payloadLengthExtraBytes = shared.config.get(
                    'bitmessagesettings', 'defaultpayloadlengthextrabytes')
            elif len(params) == 7:
                passphrase, numberOfAddresses, addressVersionNumber, streamNumber, eighteenByteRipe, totalDifficulty, smallMessageDifficulty = params
                nonceTrialsPerByte = int(
                    shared.networkDefaultProofOfWorkNonceTrialsPerByte * totalDifficulty)
                payloadLengthExtraBytes = int(
                    shared.networkDefaultPayloadLengthExtraBytes * smallMessageDifficulty)
            else:
                raise APIError(0, 'Too many parameters!')
            if len(passphrase) == 0:
                raise APIError(1, 'The specified passphrase is blank.')
            if not isinstance(eighteenByteRipe, bool):
                raise APIError(23, 'Bool expected in eighteenByteRipe, saw %s instead' % type(eighteenByteRipe))
            passphrase = self._decode(passphrase, "base64")
            if addressVersionNumber == 0:  # 0 means "just use the proper addressVersionNumber"
                addressVersionNumber = 4
            if addressVersionNumber != 3 and addressVersionNumber != 4:
                raise APIError(2,'The address version number currently must be 3, 4, or 0 (which means auto-select). ' + addressVersionNumber + ' isn\'t supported.')
            if streamNumber == 0:  # 0 means "just use the most available stream"
                streamNumber = 1
            if streamNumber != 1:
                raise APIError(3,'The stream number must be 1 (or 0 which means auto-select). Others aren\'t supported.')
            if numberOfAddresses == 0:
                raise APIError(4, 'Why would you ask me to generate 0 addresses for you?')
            if numberOfAddresses > 999:
                raise APIError(5, 'You have (accidentally?) specified too many addresses to make. Maximum 999. This check only exists to prevent mischief; if you really want to create more addresses than this, contact the Bitmessage developers and we can modify the check or you can do it yourself by searching the source code for this message.')
            shared.apiAddressGeneratorReturnQueue.queue.clear()
            logger.debug('Requesting that the addressGenerator create %s addresses.', numberOfAddresses)
            shared.addressGeneratorQueue.put(
                ('createDeterministicAddresses', addressVersionNumber, streamNumber,
                 'unused API address', numberOfAddresses, passphrase, eighteenByteRipe, nonceTrialsPerByte, payloadLengthExtraBytes))
            data = '{"addresses":['
            queueReturn = shared.apiAddressGeneratorReturnQueue.get()
            for item in queueReturn:
                if len(data) > 20:
                    data += ','
                data += "\"" + item + "\""
            data += ']}'
            return data
        elif method == 'getDeterministicAddress':
            if len(params) != 3:
                raise APIError(0, 'I need exactly 3 parameters.')
            passphrase, addressVersionNumber, streamNumber = params
            numberOfAddresses = 1
            eighteenByteRipe = False
            if len(passphrase) == 0:
                raise APIError(1, 'The specified passphrase is blank.')
            passphrase = self._decode(passphrase, "base64")
            if addressVersionNumber != 3 and addressVersionNumber != 4:
                raise APIError(2, 'The address version number currently must be 3 or 4. ' + addressVersionNumber + ' isn\'t supported.')
            if streamNumber != 1:
                raise APIError(3, ' The stream number must be 1. Others aren\'t supported.')
            shared.apiAddressGeneratorReturnQueue.queue.clear()
            logger.debug('Requesting that the addressGenerator create %s addresses.', numberOfAddresses)
            shared.addressGeneratorQueue.put(
                ('getDeterministicAddress', addressVersionNumber,
                 streamNumber, 'unused API address', numberOfAddresses, passphrase, eighteenByteRipe))
            return shared.apiAddressGeneratorReturnQueue.get()

        elif method == 'createChan':
            if len(params) == 0:
                raise APIError(0, 'I need parameters.')
            elif len(params) == 1:
                passphrase, = params
            passphrase = self._decode(passphrase, "base64")
            if len(passphrase) == 0:
                raise APIError(1, 'The specified passphrase is blank.')
            # It would be nice to make the label the passphrase but it is
            # possible that the passphrase contains non-utf-8 characters.
            try:
                unicode(passphrase, 'utf-8')
                label = str_chan + ' ' + passphrase
            except:
                label = str_chan + ' ' + repr(passphrase)

            addressVersionNumber = 4
            streamNumber = 1
            shared.apiAddressGeneratorReturnQueue.queue.clear()
            logger.debug('Requesting that the addressGenerator create chan %s.', passphrase)
            shared.addressGeneratorQueue.put(('createChan', addressVersionNumber, streamNumber, label, passphrase))
            queueReturn = shared.apiAddressGeneratorReturnQueue.get()
            if len(queueReturn) == 0:
                raise APIError(24, 'Chan address is already present.')
            address = queueReturn[0]
            return address
        elif method == 'joinChan':
            if len(params) < 2:
                raise APIError(0, 'I need two parameters.')
            elif len(params) == 2:
                passphrase, suppliedAddress= params
            passphrase = self._decode(passphrase, "base64")
            if len(passphrase) == 0:
                raise APIError(1, 'The specified passphrase is blank.')
            # It would be nice to make the label the passphrase but it is
            # possible that the passphrase contains non-utf-8 characters.
            try:
                unicode(passphrase, 'utf-8')
                label = str_chan + ' ' + passphrase
            except:
                label = str_chan + ' ' + repr(passphrase)

            status, addressVersionNumber, streamNumber, toRipe = self._verifyAddress(suppliedAddress)
            suppliedAddress = addBMIfNotPresent(suppliedAddress)
            shared.apiAddressGeneratorReturnQueue.queue.clear()
            shared.addressGeneratorQueue.put(('joinChan', suppliedAddress, label, passphrase))
            addressGeneratorReturnValue = shared.apiAddressGeneratorReturnQueue.get()

            if addressGeneratorReturnValue == 'chan name does not match address':
                raise APIError(18, 'Chan name does not match address.')
            if len(addressGeneratorReturnValue) == 0:
                raise APIError(24, 'Chan address is already present.')
            #TODO: this variable is not used to anything
            createdAddress = addressGeneratorReturnValue[0] # in case we ever want it for anything.
            return "success"
        elif method == 'leaveChan':
            if len(params) == 0:
                raise APIError(0, 'I need parameters.')
            elif len(params) == 1:
                address, = params
            status, addressVersionNumber, streamNumber, toRipe = self._verifyAddress(address)
            address = addBMIfNotPresent(address)
            if not shared.config.has_section(address):
                raise APIError(13, 'Could not find this address in your keys.dat file.')
            if not shared.safeConfigGetBoolean(address, 'chan'):
                raise APIError(25, 'Specified address is not a chan address. Use deleteAddress API call instead.')
            shared.config.remove_section(address)
            with open(shared.appdata + 'keys.dat', 'wb') as configfile:
                shared.config.write(configfile)
            return 'success'

        elif method == 'deleteAddress':
            if len(params) == 0:
                raise APIError(0, 'I need parameters.')
            elif len(params) == 1:
                address, = params
            status, addressVersionNumber, streamNumber, toRipe = self._verifyAddress(address)
            address = addBMIfNotPresent(address)
            if not shared.config.has_section(address):
                raise APIError(13, 'Could not find this address in your keys.dat file.')
            shared.config.remove_section(address)
            with open(shared.appdata + 'keys.dat', 'wb') as configfile:
                shared.config.write(configfile)
            shared.UISignalQueue.put(('rerenderInboxFromLabels',''))
            shared.UISignalQueue.put(('rerenderSentToLabels',''))
            shared.reloadMyAddressHashes()
            return 'success'

        elif method == 'getAllInboxMessages':
            queryreturn = sqlQuery(
                '''SELECT msgid, toaddress, fromaddress, subject, received, message, encodingtype, read FROM inbox where folder='inbox' ORDER BY received''')
            data = '{"inboxMessages":['
            for row in queryreturn:
                msgid, toAddress, fromAddress, subject, received, message, encodingtype, read = row
                subject = shared.fixPotentiallyInvalidUTF8Data(subject)
                message = shared.fixPotentiallyInvalidUTF8Data(message)
                if len(data) > 25:
                    data += ','
                data += json.dumps({'msgid': msgid.encode('hex'), 'toAddress': toAddress, 'fromAddress': fromAddress, 'subject': subject.encode(
                    'base64'), 'message': message.encode('base64'), 'encodingType': encodingtype, 'receivedTime': received, 'read': read}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'getAllInboxMessageIds' or method == 'getAllInboxMessageIDs':
            queryreturn = sqlQuery(
                '''SELECT msgid FROM inbox where folder='inbox' ORDER BY received''')
            data = '{"inboxMessageIds":['
            for row in queryreturn:
                msgid = row[0]
                if len(data) > 25:
                    data += ','
                data += json.dumps({'msgid': msgid.encode('hex')}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'getInboxMessageById' or method == 'getInboxMessageByID':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            elif len(params) == 1:
                msgid = self._decode(params[0], "hex")
            elif len(params) >= 2:
                msgid = self._decode(params[0], "hex")
                readStatus = params[1]
                if not isinstance(readStatus, bool):
                    raise APIError(23, 'Bool expected in readStatus, saw %s instead.' % type(readStatus))
                queryreturn = sqlQuery('''SELECT read FROM inbox WHERE msgid=?''', msgid)
                # UPDATE is slow, only update if status is different
                if queryreturn != [] and (queryreturn[0][0] == 1) != readStatus:
                    sqlExecute('''UPDATE inbox set read = ? WHERE msgid=?''', readStatus, msgid)
                    shared.UISignalQueue.put(('changedInboxUnread', None))
            queryreturn = sqlQuery('''SELECT msgid, toaddress, fromaddress, subject, received, message, encodingtype, read FROM inbox WHERE msgid=?''', msgid)
            data = '{"inboxMessage":['
            for row in queryreturn:
                msgid, toAddress, fromAddress, subject, received, message, encodingtype, read = row
                subject = shared.fixPotentiallyInvalidUTF8Data(subject)
                message = shared.fixPotentiallyInvalidUTF8Data(message)
                data += json.dumps({'msgid':msgid.encode('hex'), 'toAddress':toAddress, 'fromAddress':fromAddress, 'subject':subject.encode('base64'), 'message':message.encode('base64'), 'encodingType':encodingtype, 'receivedTime':received, 'read': read}, indent=4, separators=(',', ': '))
                data += ']}'
                return data
        elif method == 'getAllSentMessages':
            queryreturn = sqlQuery('''SELECT msgid, toaddress, fromaddress, subject, lastactiontime, message, encodingtype, status, ackdata FROM sent where folder='sent' ORDER BY lastactiontime''')
            data = '{"sentMessages":['
            for row in queryreturn:
                msgid, toAddress, fromAddress, subject, lastactiontime, message, encodingtype, status, ackdata = row
                subject = shared.fixPotentiallyInvalidUTF8Data(subject)
                message = shared.fixPotentiallyInvalidUTF8Data(message)
                if len(data) > 25:
                    data += ','
                data += json.dumps({'msgid':msgid.encode('hex'), 'toAddress':toAddress, 'fromAddress':fromAddress, 'subject':subject.encode('base64'), 'message':message.encode('base64'), 'encodingType':encodingtype, 'lastActionTime':lastactiontime, 'status':status, 'ackData':ackdata.encode('hex')}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'getAllSentMessageIds' or method == 'getAllSentMessageIDs':
            queryreturn = sqlQuery('''SELECT msgid FROM sent where folder='sent' ORDER BY lastactiontime''')
            data = '{"sentMessageIds":['
            for row in queryreturn:
                msgid = row[0]
                if len(data) > 25:
                    data += ','
                data += json.dumps({'msgid':msgid.encode('hex')}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'getInboxMessagesByReceiver' or method == 'getInboxMessagesByAddress': #after some time getInboxMessagesByAddress should be removed
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            toAddress = params[0]
            queryreturn = sqlQuery('''SELECT msgid, toaddress, fromaddress, subject, received, message, encodingtype FROM inbox WHERE folder='inbox' AND toAddress=?''', toAddress)
            data = '{"inboxMessages":['
            for row in queryreturn:
                msgid, toAddress, fromAddress, subject, received, message, encodingtype = row
                subject = shared.fixPotentiallyInvalidUTF8Data(subject)
                message = shared.fixPotentiallyInvalidUTF8Data(message)
                if len(data) > 25:
                    data += ','
                data += json.dumps({'msgid':msgid.encode('hex'), 'toAddress':toAddress, 'fromAddress':fromAddress, 'subject':subject.encode('base64'), 'message':message.encode('base64'), 'encodingType':encodingtype, 'receivedTime':received}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'getSentMessageById' or method == 'getSentMessageByID':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            msgid = self._decode(params[0], "hex")
            queryreturn = sqlQuery('''SELECT msgid, toaddress, fromaddress, subject, lastactiontime, message, encodingtype, status, ackdata FROM sent WHERE msgid=?''', msgid)
            data = '{"sentMessage":['
            for row in queryreturn:
                msgid, toAddress, fromAddress, subject, lastactiontime, message, encodingtype, status, ackdata = row
                subject = shared.fixPotentiallyInvalidUTF8Data(subject)
                message = shared.fixPotentiallyInvalidUTF8Data(message)
                data += json.dumps({'msgid':msgid.encode('hex'), 'toAddress':toAddress, 'fromAddress':fromAddress, 'subject':subject.encode('base64'), 'message':message.encode('base64'), 'encodingType':encodingtype, 'lastActionTime':lastactiontime, 'status':status, 'ackData':ackdata.encode('hex')}, indent=4, separators=(',', ': '))
                data += ']}'
                return data
        elif method == 'getSentMessagesByAddress' or method == 'getSentMessagesBySender':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            fromAddress = params[0]
            queryreturn = sqlQuery('''SELECT msgid, toaddress, fromaddress, subject, lastactiontime, message, encodingtype, status, ackdata FROM sent WHERE folder='sent' AND fromAddress=? ORDER BY lastactiontime''',
                                   fromAddress)
            data = '{"sentMessages":['
            for row in queryreturn:
                msgid, toAddress, fromAddress, subject, lastactiontime, message, encodingtype, status, ackdata = row
                subject = shared.fixPotentiallyInvalidUTF8Data(subject)
                message = shared.fixPotentiallyInvalidUTF8Data(message)
                if len(data) > 25:
                    data += ','
                data += json.dumps({'msgid':msgid.encode('hex'), 'toAddress':toAddress, 'fromAddress':fromAddress, 'subject':subject.encode('base64'), 'message':message.encode('base64'), 'encodingType':encodingtype, 'lastActionTime':lastactiontime, 'status':status, 'ackData':ackdata.encode('hex')}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'getSentMessageByAckData':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            ackData = self._decode(params[0], "hex")
            queryreturn = sqlQuery('''SELECT msgid, toaddress, fromaddress, subject, lastactiontime, message, encodingtype, status, ackdata FROM sent WHERE ackdata=?''',
                                   ackData)
            data = '{"sentMessage":['
            for row in queryreturn:
                msgid, toAddress, fromAddress, subject, lastactiontime, message, encodingtype, status, ackdata = row
                subject = shared.fixPotentiallyInvalidUTF8Data(subject)
                message = shared.fixPotentiallyInvalidUTF8Data(message)
                data += json.dumps({'msgid':msgid.encode('hex'), 'toAddress':toAddress, 'fromAddress':fromAddress, 'subject':subject.encode('base64'), 'message':message.encode('base64'), 'encodingType':encodingtype, 'lastActionTime':lastactiontime, 'status':status, 'ackData':ackdata.encode('hex')}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'trashMessage':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            msgid = self._decode(params[0], "hex")

            # Trash if in inbox table
            helper_inbox.trash(msgid)
            # Trash if in sent table
            sqlExecute('''UPDATE sent SET folder='trash' WHERE msgid=?''', msgid)
            return 'Trashed message (assuming message existed).'
        elif method == 'trashInboxMessage':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            msgid = self._decode(params[0], "hex")
            helper_inbox.trash(msgid)
            return 'Trashed inbox message (assuming message existed).'
        elif method == 'trashSentMessage':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            msgid = self._decode(params[0], "hex")
            sqlExecute('''UPDATE sent SET folder='trash' WHERE msgid=?''', msgid)
            return 'Trashed sent message (assuming message existed).'
        elif method == 'trashSentMessageByAckData':
            # This API method should only be used when msgid is not available
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            ackdata = self._decode(params[0], "hex")
            sqlExecute('''UPDATE sent SET folder='trash' WHERE ackdata=?''',
                       ackdata)
            return 'Trashed sent message (assuming message existed).'
        elif method == 'sendMessage':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            elif len(params) == 4:
                toAddress, fromAddress, subject, message = params
                encodingType = 2
            elif len(params) == 5:
                toAddress, fromAddress, subject, message, encodingType = params
            if encodingType != 2:
                raise APIError(6, 'The encoding type must be 2 because that is the only one this program currently supports.')
            subject = self._decode(subject, "base64")
            message = self._decode(message, "base64")
            toAddress = addBMIfNotPresent(toAddress)
            fromAddress = addBMIfNotPresent(fromAddress)
            status, addressVersionNumber, streamNumber, toRipe = self._verifyAddress(toAddress)
            self._verifyAddress(fromAddress)
            try:
                fromAddressEnabled = shared.config.getboolean(
                    fromAddress, 'enabled')
            except:
                raise APIError(13, 'Could not find your fromAddress in the keys.dat file.')
            if not fromAddressEnabled:
                raise APIError(14, 'Your fromAddress is disabled. Cannot send.')

            ackdata = OpenSSL.rand(32)

            t = ('', toAddress, toRipe, fromAddress, subject, message, ackdata, int(
                time.time()), 'msgqueued', 1, 1, 'sent', 2)
            helper_sent.insert(t)

            toLabel = ''
            queryreturn = sqlQuery('''select label from addressbook where address=?''', toAddress)
            if queryreturn != []:
                for row in queryreturn:
                    toLabel, = row
            # apiSignalQueue.put(('displayNewSentMessage',(toAddress,toLabel,fromAddress,subject,message,ackdata)))
            shared.UISignalQueue.put(('displayNewSentMessage', (
                toAddress, toLabel, fromAddress, subject, message, ackdata)))

            shared.workerQueue.put(('sendmessage', toAddress))

            return ackdata.encode('hex')

        elif method == 'sendBroadcast':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            if len(params) == 3:
                fromAddress, subject, message = params
                encodingType = 2
            elif len(params) == 4:
                fromAddress, subject, message, encodingType = params
            if encodingType != 2:
                raise APIError(6, 'The encoding type must be 2 because that is the only one this program currently supports.')
            subject = self._decode(subject, "base64")
            message = self._decode(message, "base64")

            fromAddress = addBMIfNotPresent(fromAddress)
            self._verifyAddress(fromAddress)
            try:
                fromAddressEnabled = shared.config.getboolean(
                    fromAddress, 'enabled')
            except:
                raise APIError(13, 'could not find your fromAddress in the keys.dat file.')
            ackdata = OpenSSL.rand(32)
            toAddress = '[Broadcast subscribers]'
            ripe = ''


            t = ('', toAddress, ripe, fromAddress, subject, message, ackdata, int(
                time.time()), 'broadcastqueued', 1, 1, 'sent', 2)
            helper_sent.insert(t)

            toLabel = '[Broadcast subscribers]'
            shared.UISignalQueue.put(('displayNewSentMessage', (
                toAddress, toLabel, fromAddress, subject, message, ackdata)))
            shared.workerQueue.put(('sendbroadcast', ''))

            return ackdata.encode('hex')
        elif method == 'getStatus':
            if len(params) != 1:
                raise APIError(0, 'I need one parameter!')
            ackdata, = params
            if len(ackdata) != 64:
                raise APIError(15, 'The length of ackData should be 32 bytes (encoded in hex thus 64 characters).')
            ackdata = self._decode(ackdata, "hex")
            queryreturn = sqlQuery(
                '''SELECT status FROM sent where ackdata=?''',
                ackdata)
            if queryreturn == []:
                return 'notfound'
            for row in queryreturn:
                status, = row
                return status
        elif method == 'addSubscription':
            if len(params) == 0:
                raise APIError(0, 'I need parameters!')
            if len(params) == 1:
                address, = params
                label = ''
            if len(params) == 2:
                address, label = params
                label = self._decode(label, "base64")
                try:
                    unicode(label, 'utf-8')
                except:
                    raise APIError(17, 'Label is not valid UTF-8 data.')
            if len(params) > 2:
                raise APIError(0, 'I need either 1 or 2 parameters!')
            address = addBMIfNotPresent(address)
            self._verifyAddress(address)
            # First we must check to see if the address is already in the
            # subscriptions list.
            queryreturn = sqlQuery('''select * from subscriptions where address=?''', address)
            if queryreturn != []:
                raise APIError(16, 'You are already subscribed to that address.')
            sqlExecute('''INSERT INTO subscriptions VALUES (?,?,?)''',label, address, True)
            shared.reloadBroadcastSendersForWhichImWatching()
            shared.UISignalQueue.put(('rerenderInboxFromLabels', ''))
            shared.UISignalQueue.put(('rerenderSubscriptions', ''))
            return 'Added subscription.'

        elif method == 'deleteSubscription':
            if len(params) != 1:
                raise APIError(0, 'I need 1 parameter!')
            address, = params
            address = addBMIfNotPresent(address)
            sqlExecute('''DELETE FROM subscriptions WHERE address=?''', address)
            shared.reloadBroadcastSendersForWhichImWatching()
            shared.UISignalQueue.put(('rerenderInboxFromLabels', ''))
            shared.UISignalQueue.put(('rerenderSubscriptions', ''))
            return 'Deleted subscription if it existed.'
        elif method == 'listSubscriptions':
            queryreturn = sqlQuery('''SELECT label, address, enabled FROM subscriptions''')
            data = '{"subscriptions":['
            for row in queryreturn:
                label, address, enabled = row
                label = shared.fixPotentiallyInvalidUTF8Data(label)
                if len(data) > 20:
                    data += ','
                data += json.dumps({'label':label.encode('base64'), 'address': address, 'enabled': enabled == 1}, indent=4, separators=(',',': '))
            data += ']}'
            return data
        elif method == 'disseminatePreEncryptedMsg':
            # The device issuing this command to PyBitmessage supplies a msg object that has
            # already been encrypted but which still needs the POW to be done. PyBitmessage
            # accepts this msg object and sends it out to the rest of the Bitmessage network
            # as if it had generated the message itself. Please do not yet add this to the
            # api doc.
            if len(params) != 3:
                raise APIError(0, 'I need 3 parameter!')
            encryptedPayload, requiredAverageProofOfWorkNonceTrialsPerByte, requiredPayloadLengthExtraBytes = params
            encryptedPayload = self._decode(encryptedPayload, "hex")
            # Let us do the POW and attach it to the front
            target = 2**64 / ((len(encryptedPayload)+requiredPayloadLengthExtraBytes+8) * requiredAverageProofOfWorkNonceTrialsPerByte)
            with shared.printLock:
                print '(For msg message via API) Doing proof of work. Total required difficulty:', float(requiredAverageProofOfWorkNonceTrialsPerByte) / shared.networkDefaultProofOfWorkNonceTrialsPerByte, 'Required small message difficulty:', float(requiredPayloadLengthExtraBytes) / shared.networkDefaultPayloadLengthExtraBytes
            powStartTime = time.time()
            initialHash = hashlib.sha512(encryptedPayload).digest()
            trialValue, nonce = proofofwork.run(target, initialHash)
            with shared.printLock:
                print '(For msg message via API) Found proof of work', trialValue, 'Nonce:', nonce
                try:
                    print 'POW took', int(time.time() - powStartTime), 'seconds.', nonce / (time.time() - powStartTime), 'nonce trials per second.'
                except:
                    pass
            encryptedPayload = pack('>Q', nonce) + encryptedPayload
            toStreamNumber = decodeVarint(encryptedPayload[16:26])[0]
            inventoryHash = calculateInventoryHash(encryptedPayload)
            objectType = 'msg'
            shared.inventory[inventoryHash] = (
                objectType, toStreamNumber, encryptedPayload, int(time.time()),'')
            shared.inventorySets[toStreamNumber].add(inventoryHash)
            with shared.printLock:
                print 'Broadcasting inv for msg(API disseminatePreEncryptedMsg command):', inventoryHash.encode('hex')
            shared.broadcastToSendDataQueues((
                toStreamNumber, 'advertiseobject', inventoryHash))
        elif method == 'disseminatePubkey':
            # The device issuing this command to PyBitmessage supplies a pubkey object to be
            # disseminated to the rest of the Bitmessage network. PyBitmessage accepts this
            # pubkey object and sends it out to the rest of the Bitmessage network as if it
            # had generated the pubkey object itself. Please do not yet add this to the api
            # doc.
            if len(params) != 1:
                raise APIError(0, 'I need 1 parameter!')
            payload, = params
            payload = self._decode(payload, "hex")

            # Let us do the POW
            target = 2 ** 64 / ((len(payload) + shared.networkDefaultPayloadLengthExtraBytes +
                                 8) * shared.networkDefaultProofOfWorkNonceTrialsPerByte)
            print '(For pubkey message via API) Doing proof of work...'
            initialHash = hashlib.sha512(payload).digest()
            trialValue, nonce = proofofwork.run(target, initialHash)
            print '(For pubkey message via API) Found proof of work', trialValue, 'Nonce:', nonce
            payload = pack('>Q', nonce) + payload

            pubkeyReadPosition = 8 # bypass the nonce
            if payload[pubkeyReadPosition:pubkeyReadPosition+4] == '\x00\x00\x00\x00': # if this pubkey uses 8 byte time
                pubkeyReadPosition += 8
            else:
                pubkeyReadPosition += 4
            addressVersion, addressVersionLength = decodeVarint(payload[pubkeyReadPosition:pubkeyReadPosition+10])
            pubkeyReadPosition += addressVersionLength
            pubkeyStreamNumber = decodeVarint(payload[pubkeyReadPosition:pubkeyReadPosition+10])[0]
            inventoryHash = calculateInventoryHash(payload)
            objectType = 'pubkey'
                        #todo: support v4 pubkeys
            shared.inventory[inventoryHash] = (
                objectType, pubkeyStreamNumber, payload, int(time.time()),'')
            shared.inventorySets[pubkeyStreamNumber].add(inventoryHash)
            with shared.printLock:
                print 'broadcasting inv within API command disseminatePubkey with hash:', inventoryHash.encode('hex')
            shared.broadcastToSendDataQueues((
                streamNumber, 'advertiseobject', inventoryHash))
        elif method == 'getMessageDataByDestinationHash' or method == 'getMessageDataByDestinationTag':
            # Method will eventually be used by a particular Android app to
            # select relevant messages. Do not yet add this to the api
            # doc.

            if len(params) != 1:
                raise APIError(0, 'I need 1 parameter!')
            requestedHash, = params
            if len(requestedHash) != 32:
                raise APIError(19, 'The length of hash should be 32 bytes (encoded in hex thus 64 characters).')
            requestedHash = self._decode(requestedHash, "hex")

            # This is not a particularly commonly used API function. Before we
            # use it we'll need to fill out a field in our inventory database
            # which is blank by default (first20bytesofencryptedmessage).
            queryreturn = sqlQuery(
                '''SELECT hash, payload FROM inventory WHERE tag = '' and objecttype = 'msg' ; ''')
            with SqlBulkExecute() as sql:
                for row in queryreturn:
                    hash01, payload = row
                    readPosition = 16 # Nonce length + time length
                    readPosition += decodeVarint(payload[readPosition:readPosition+10])[1] # Stream Number length
                    t = (payload[readPosition:readPosition+32],hash01)
                    sql.execute('''UPDATE inventory SET tag=? WHERE hash=?; ''', *t)

            queryreturn = sqlQuery('''SELECT payload FROM inventory WHERE tag = ?''',
                                   requestedHash)
            data = '{"receivedMessageDatas":['
            for row in queryreturn:
                payload, = row
                if len(data) > 25:
                    data += ','
                data += json.dumps({'data':payload.encode('hex')}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'getPubkeyByHash':
            # Method will eventually be used by a particular Android app to
            # retrieve pubkeys. Please do not yet add this to the api docs.
            if len(params) != 1:
                raise APIError(0, 'I need 1 parameter!')
            requestedHash, = params
            if len(requestedHash) != 40:
                raise APIError(19, 'The length of hash should be 20 bytes (encoded in hex thus 40 characters).')
            requestedHash = self._decode(requestedHash, "hex")
            queryreturn = sqlQuery('''SELECT transmitdata FROM pubkeys WHERE hash = ? ; ''', requestedHash)
            data = '{"pubkey":['
            for row in queryreturn:
                transmitdata, = row
                data += json.dumps({'data':transmitdata.encode('hex')}, indent=4, separators=(',', ': '))
            data += ']}'
            return data
        elif method == 'clientStatus':
            if len(shared.connectedHostsList) == 0:
                networkStatus = 'notConnected'
            elif len(shared.connectedHostsList) > 0 and not shared.clientHasReceivedIncomingConnections:
                networkStatus = 'connectedButHaveNotReceivedIncomingConnections'
            else:
                networkStatus = 'connectedAndReceivingIncomingConnections'
            return json.dumps({'networkConnections':len(shared.connectedHostsList),'numberOfMessagesProcessed':shared.numberOfMessagesProcessed, 'numberOfBroadcastsProcessed':shared.numberOfBroadcastsProcessed, 'numberOfPubkeysProcessed':shared.numberOfPubkeysProcessed, 'networkStatus':networkStatus, 'softwareName':'PyBitmessage','softwareVersion':shared.softwareVersion}, indent=4, separators=(',', ': '))
        elif method == 'decodeAddress':
            # Return a meaningful decoding of an address.
            if len(params) != 1:
                raise APIError(0, 'I need 1 parameter!')
            address, = params
            status, addressVersion, streamNumber, ripe = decodeAddress(address)
            return json.dumps({'status':status, 'addressVersion':addressVersion,
                               'streamNumber':streamNumber, 'ripe':ripe.encode('base64')}, indent=4,
                              separators=(',', ': '))
        else:
            raise APIError(20, 'Invalid method: %s' % method)