2015-08-22 10:48:49 +02:00
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from __future__ import division
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2015-01-21 18:38:25 +01:00
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2013-07-08 22:21:29 +02:00
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# Libraries.
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import os
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import sys
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import stat
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2017-09-21 17:24:51 +02:00
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import threading
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import hashlib
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import subprocess
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2016-03-23 23:26:57 +01:00
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from binascii import hexlify
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2017-09-21 17:24:51 +02:00
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from pyelliptic import arithmetic
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2013-07-08 22:21:29 +02:00
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# Project imports.
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2017-09-21 17:24:51 +02:00
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import state
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2013-06-24 21:51:01 +02:00
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import highlevelcrypto
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2017-09-21 17:24:51 +02:00
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from bmconfigparser import BMConfigParser
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from debug import logger
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2019-01-30 10:14:42 +01:00
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from addresses import decodeAddress, encodeVarint
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from helper_sql import sqlQuery
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2017-09-21 17:24:51 +02:00
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verbose = 1
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# This is obsolete with the change to protocol v3
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# but the singleCleaner thread still hasn't been updated
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# so we need this a little longer.
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maximumAgeOfAnObjectThatIAmWillingToAccept = 216000
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# Equals 4 weeks. You could make this longer if you want
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# but making it shorter would not be advisable because
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# there is a very small possibility that it could keep you
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# from obtaining a needed pubkey for a period of time.
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lengthOfTimeToHoldOnToAllPubkeys = 2419200
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maximumAgeOfNodesThatIAdvertiseToOthers = 10800 # Equals three hours
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# If you set this to True while on the normal network,
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# you won't be able to send or sometimes receive messages.
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useVeryEasyProofOfWorkForTesting = False
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2013-05-02 17:53:54 +02:00
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myECCryptorObjects = {}
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MyECSubscriptionCryptorObjects = {}
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2017-09-21 17:24:51 +02:00
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# The key in this dictionary is the RIPE hash which is encoded
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# in an address and value is the address itself.
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myAddressesByHash = {}
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# The key in this dictionary is the tag generated from the address.
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myAddressesByTag = {}
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2013-05-02 17:53:54 +02:00
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broadcastSendersForWhichImWatching = {}
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printLock = threading.Lock()
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statusIconColor = 'red'
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2018-11-01 15:28:42 +01:00
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2017-09-21 17:24:51 +02:00
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thisapp = None # singleton lock instance
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2019-02-01 18:14:56 +01:00
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2017-09-21 17:24:51 +02:00
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successfullyDecryptMessageTimings = []
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2013-06-24 21:51:01 +02:00
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ackdataForWhichImWatching = {}
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2017-09-21 17:24:51 +02:00
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# used by API command clientStatus
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clientHasReceivedIncomingConnections = False
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2013-08-25 01:40:48 +02:00
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numberOfMessagesProcessed = 0
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numberOfBroadcastsProcessed = 0
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numberOfPubkeysProcessed = 0
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2018-01-25 11:58:29 +01:00
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2013-11-04 08:05:07 +01:00
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maximumLengthOfTimeToBotherResendingMessages = 0
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2016-10-23 10:12:49 +02:00
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timeOffsetWrongCount = 0
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2013-05-02 17:53:54 +02:00
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2017-09-21 17:24:51 +02:00
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2013-05-02 17:53:54 +02:00
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def isAddressInMyAddressBook(address):
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2013-08-29 14:03:45 +02:00
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queryreturn = sqlQuery(
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'''select address from addressbook where address=?''',
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address)
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2013-05-02 17:53:54 +02:00
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return queryreturn != []
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2017-09-21 17:24:51 +02:00
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# At this point we should really just have a isAddressInMy(book, address)...
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2013-06-14 03:55:38 +02:00
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def isAddressInMySubscriptionsList(address):
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2013-08-29 16:00:27 +02:00
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queryreturn = sqlQuery(
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2013-08-29 14:03:45 +02:00
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'''select * from subscriptions where address=?''',
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str(address))
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2013-06-14 03:55:38 +02:00
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return queryreturn != []
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2013-06-14 04:03:03 +02:00
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2017-09-21 17:24:51 +02:00
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2013-05-02 17:53:54 +02:00
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def isAddressInMyAddressBookSubscriptionsListOrWhitelist(address):
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if isAddressInMyAddressBook(address):
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return True
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2017-09-21 17:24:51 +02:00
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queryreturn = sqlQuery(
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'''SELECT address FROM whitelist where address=?'''
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''' and enabled = '1' ''',
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address)
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if queryreturn != []:
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2013-05-02 17:53:54 +02:00
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return True
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2013-08-29 16:00:27 +02:00
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queryreturn = sqlQuery(
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2017-09-21 17:24:51 +02:00
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'''select address from subscriptions where address=?'''
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''' and enabled = '1' ''',
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2013-08-29 14:03:45 +02:00
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address)
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2017-09-21 17:24:51 +02:00
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if queryreturn != []:
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2013-05-02 17:53:54 +02:00
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return True
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return False
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2017-09-21 17:24:51 +02:00
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2013-05-02 17:53:54 +02:00
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def decodeWalletImportFormat(WIFstring):
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2017-09-21 17:24:51 +02:00
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fullString = arithmetic.changebase(WIFstring, 58, 256)
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2013-05-02 17:53:54 +02:00
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privkey = fullString[:-4]
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2017-09-21 17:24:51 +02:00
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if fullString[-4:] != \
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hashlib.sha256(hashlib.sha256(privkey).digest()).digest()[:4]:
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logger.critical(
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'Major problem! When trying to decode one of your'
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' private keys, the checksum failed. Here are the first'
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' 6 characters of the PRIVATE key: %s',
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str(WIFstring)[:6]
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)
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2013-11-20 07:29:37 +01:00
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os._exit(0)
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2017-09-21 17:24:51 +02:00
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# return ""
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2017-09-21 17:29:32 +02:00
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elif privkey[0] == '\x80': # checksum passed
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return privkey[1:]
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logger.critical(
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'Major problem! When trying to decode one of your private keys,'
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' the checksum passed but the key doesn\'t begin with hex 80.'
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' Here is the PRIVATE key: %s', WIFstring
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)
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os._exit(0)
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2013-05-02 17:53:54 +02:00
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def reloadMyAddressHashes():
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2013-07-10 20:50:18 +02:00
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logger.debug('reloading keys from keys.dat file')
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2013-05-02 17:53:54 +02:00
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myECCryptorObjects.clear()
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myAddressesByHash.clear()
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2013-09-15 03:06:26 +02:00
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myAddressesByTag.clear()
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2017-09-21 17:24:51 +02:00
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# myPrivateKeys.clear()
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2013-06-27 12:02:52 +02:00
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2017-01-11 17:00:00 +01:00
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keyfileSecure = checkSensitiveFilePermissions(state.appdata + 'keys.dat')
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2013-06-27 12:02:52 +02:00
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hasEnabledKeys = False
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2017-05-15 12:18:07 +02:00
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for addressInKeysFile in BMConfigParser().addresses():
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isEnabled = BMConfigParser().getboolean(addressInKeysFile, 'enabled')
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if isEnabled:
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hasEnabledKeys = True
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2018-03-22 12:23:36 +01:00
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# status
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_, addressVersionNumber, streamNumber, hash = \
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2017-09-21 17:24:51 +02:00
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decodeAddress(addressInKeysFile)
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if addressVersionNumber in (2, 3, 4):
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# Returns a simple 32 bytes of information encoded
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# in 64 Hex characters, or null if there was an error.
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2017-05-15 12:18:07 +02:00
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privEncryptionKey = hexlify(decodeWalletImportFormat(
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2017-09-21 17:24:51 +02:00
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BMConfigParser().get(addressInKeysFile, 'privencryptionkey'))
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)
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2017-05-15 12:18:07 +02:00
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2017-09-21 17:24:51 +02:00
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# It is 32 bytes encoded as 64 hex characters
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if len(privEncryptionKey) == 64:
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myECCryptorObjects[hash] = \
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highlevelcrypto.makeCryptor(privEncryptionKey)
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2017-05-15 12:18:07 +02:00
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myAddressesByHash[hash] = addressInKeysFile
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2017-09-21 17:24:51 +02:00
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tag = hashlib.sha512(hashlib.sha512(
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encodeVarint(addressVersionNumber) +
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encodeVarint(streamNumber) + hash).digest()
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).digest()[32:]
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2017-05-15 12:18:07 +02:00
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myAddressesByTag[tag] = addressInKeysFile
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else:
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2017-09-21 17:24:51 +02:00
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logger.error(
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'Error in reloadMyAddressHashes: Can\'t handle'
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' address versions other than 2, 3, or 4.\n'
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)
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2013-06-27 12:44:49 +02:00
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if not keyfileSecure:
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2017-01-11 17:00:00 +01:00
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fixSensitiveFilePermissions(state.appdata + 'keys.dat', hasEnabledKeys)
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2013-05-02 17:53:54 +02:00
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2017-09-21 17:24:51 +02:00
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2013-05-02 17:53:54 +02:00
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def reloadBroadcastSendersForWhichImWatching():
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broadcastSendersForWhichImWatching.clear()
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MyECSubscriptionCryptorObjects.clear()
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2013-08-29 14:03:45 +02:00
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queryreturn = sqlQuery('SELECT address FROM subscriptions where enabled=1')
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2013-09-15 03:06:26 +02:00
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logger.debug('reloading subscriptions...')
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2013-05-02 17:53:54 +02:00
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for row in queryreturn:
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address, = row
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2018-03-22 12:48:07 +01:00
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# status
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_, addressVersionNumber, streamNumber, hash = decodeAddress(address)
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2013-05-02 17:53:54 +02:00
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if addressVersionNumber == 2:
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broadcastSendersForWhichImWatching[hash] = 0
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2017-09-21 17:24:51 +02:00
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# Now, for all addresses, even version 2 addresses,
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# we should create Cryptor objects in a dictionary which we will
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# use to attempt to decrypt encrypted broadcast messages.
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2013-09-15 03:06:26 +02:00
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if addressVersionNumber <= 3:
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2017-09-21 17:24:51 +02:00
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privEncryptionKey = hashlib.sha512(
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encodeVarint(addressVersionNumber) +
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encodeVarint(streamNumber) + hash
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).digest()[:32]
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MyECSubscriptionCryptorObjects[hash] = \
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highlevelcrypto.makeCryptor(hexlify(privEncryptionKey))
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2013-09-15 03:06:26 +02:00
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else:
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2017-09-21 17:24:51 +02:00
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doubleHashOfAddressData = hashlib.sha512(hashlib.sha512(
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encodeVarint(addressVersionNumber) +
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encodeVarint(streamNumber) + hash
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).digest()).digest()
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2013-09-15 03:06:26 +02:00
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tag = doubleHashOfAddressData[32:]
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privEncryptionKey = doubleHashOfAddressData[:32]
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2017-09-21 17:24:51 +02:00
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MyECSubscriptionCryptorObjects[tag] = \
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highlevelcrypto.makeCryptor(hexlify(privEncryptionKey))
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2013-05-02 17:53:54 +02:00
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2013-06-11 00:53:15 +02:00
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def fixPotentiallyInvalidUTF8Data(text):
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try:
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2017-09-21 17:24:51 +02:00
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unicode(text, 'utf-8')
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2013-06-11 00:53:15 +02:00
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return text
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except:
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2017-09-21 17:24:51 +02:00
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return 'Part of the message is corrupt. The message cannot be' \
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' displayed the normal way.\n\n' + repr(text)
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2013-07-14 22:12:59 +02:00
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2017-09-21 17:24:51 +02:00
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# Checks sensitive file permissions for inappropriate umask
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# during keys.dat creation. (Or unwise subsequent chmod.)
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2013-07-10 10:43:18 +02:00
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#
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2013-06-27 12:44:49 +02:00
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# Returns true iff file appears to have appropriate permissions.
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2013-06-27 12:02:52 +02:00
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def checkSensitiveFilePermissions(filename):
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if sys.platform == 'win32':
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# TODO: This might deserve extra checks by someone familiar with
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# Windows systems.
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2013-06-27 12:44:49 +02:00
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return True
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2013-11-29 01:20:16 +01:00
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elif sys.platform[:7] == 'freebsd':
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# FreeBSD file systems are the same as major Linux file systems
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present_permissions = os.stat(filename)[0]
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disallowed_permissions = stat.S_IRWXG | stat.S_IRWXO
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return present_permissions & disallowed_permissions == 0
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2013-06-27 12:02:52 +02:00
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else:
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2013-08-05 22:06:46 +02:00
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try:
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2017-09-21 17:24:51 +02:00
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# Skip known problems for non-Win32 filesystems
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# without POSIX permissions.
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fstype = subprocess.check_output(
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'stat -f -c "%%T" %s' % (filename),
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shell=True,
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stderr=subprocess.STDOUT
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)
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2013-08-05 22:06:46 +02:00
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if 'fuseblk' in fstype:
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2017-09-21 17:24:51 +02:00
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logger.info(
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'Skipping file permissions check for %s.'
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' Filesystem fuseblk detected.', filename)
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2013-08-05 22:06:46 +02:00
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return True
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except:
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# Swallow exception here, but we might run into trouble later!
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2013-08-13 02:32:13 +02:00
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logger.error('Could not determine filesystem type. %s', filename)
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2013-06-27 12:44:49 +02:00
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present_permissions = os.stat(filename)[0]
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disallowed_permissions = stat.S_IRWXG | stat.S_IRWXO
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return present_permissions & disallowed_permissions == 0
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2013-06-27 12:02:52 +02:00
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2017-09-21 17:24:51 +02:00
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2013-06-27 12:02:52 +02:00
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# Fixes permissions on a sensitive file.
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2013-06-27 12:44:49 +02:00
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def fixSensitiveFilePermissions(filename, hasEnabledKeys):
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if hasEnabledKeys:
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2017-09-21 17:24:51 +02:00
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logger.warning(
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'Keyfile had insecure permissions, and there were enabled'
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' keys. The truly paranoid should stop using them immediately.')
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2013-06-27 12:44:49 +02:00
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else:
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2017-09-21 17:24:51 +02:00
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logger.warning(
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'Keyfile had insecure permissions, but there were no enabled keys.'
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)
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2013-06-27 12:44:49 +02:00
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try:
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present_permissions = os.stat(filename)[0]
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disallowed_permissions = stat.S_IRWXG | stat.S_IRWXO
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2017-09-21 17:24:51 +02:00
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|
|
allowed_permissions = ((1 << 32) - 1) ^ disallowed_permissions
|
2013-06-27 12:44:49 +02:00
|
|
|
|
new_permissions = (
|
|
|
|
|
allowed_permissions & present_permissions)
|
|
|
|
|
os.chmod(filename, new_permissions)
|
|
|
|
|
|
2013-07-08 22:21:29 +02:00
|
|
|
|
logger.info('Keyfile permissions automatically fixed.')
|
|
|
|
|
|
2017-09-21 17:24:51 +02:00
|
|
|
|
except Exception:
|
2013-07-08 22:21:29 +02:00
|
|
|
|
logger.exception('Keyfile permissions could not be fixed.')
|
2013-06-27 12:44:49 +02:00
|
|
|
|
raise
|
2017-09-21 17:24:51 +02:00
|
|
|
|
|
|
|
|
|
|
2014-09-15 08:34:33 +02:00
|
|
|
|
def openKeysFile():
|
|
|
|
|
if 'linux' in sys.platform:
|
2017-01-11 17:00:00 +01:00
|
|
|
|
subprocess.call(["xdg-open", state.appdata + 'keys.dat'])
|
2014-09-15 08:34:33 +02:00
|
|
|
|
else:
|
2017-01-11 17:00:00 +01:00
|
|
|
|
os.startfile(state.appdata + 'keys.dat')
|