712 lines
27 KiB
Python
712 lines
27 KiB
Python
'''
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Onionr - P2P Microblogging Platform & Social network
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OnionrUtils offers various useful functions to Onionr. Relatively misc.
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'''
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'''
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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'''
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# Misc functions that do not fit in the main api, but are useful
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import getpass, sys, requests, os, socket, hashlib, logger, sqlite3, config, binascii, time, base64, json, glob, shutil, math, json, re
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import nacl.signing, nacl.encoding
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from onionrblockapi import Block
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import onionrexceptions
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from onionr import API_VERSION
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from defusedxml import minidom
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import onionrevents
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import pgpwords, onionrusers, storagecounter
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if sys.version_info < (3, 6):
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try:
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import sha3
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except ModuleNotFoundError:
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logger.fatal('On Python 3 versions prior to 3.6.x, you need the sha3 module')
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sys.exit(1)
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class OnionrUtils:
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'''
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Various useful functions for validating things, etc functions, connectivity
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'''
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def __init__(self, coreInstance):
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#self.fingerprintFile = 'data/own-fingerprint.txt' #TODO Remove since probably not needed
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self._core = coreInstance # onionr core instance
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self.timingToken = '' # for when we make local connections to our http api, to bypass timing attack defense mechanism
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self.avoidDupe = [] # list used to prevent duplicate requests per peer for certain actions
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self.peerProcessing = {} # dict of current peer actions: peer, actionList
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self.storageCounter = storagecounter.StorageCounter(self._core) # used to keep track of how much data onionr is using on disk
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config.reload() # onionr config
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return
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def getTimeBypassToken(self):
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'''
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Load our timingToken from disk for faster local HTTP API
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'''
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try:
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if os.path.exists(self._core.dataDir + 'time-bypass.txt'):
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with open(self._core.dataDir + 'time-bypass.txt', 'r') as bypass:
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self.timingToken = bypass.read()
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except Exception as error:
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logger.error('Failed to fetch time bypass token.', error = error)
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return self.timingToken
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def getRoundedEpoch(self, roundS=60):
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'''
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Returns the epoch, rounded down to given seconds (Default 60)
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'''
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epoch = self.getEpoch()
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return epoch - (epoch % roundS)
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def mergeKeys(self, newKeyList):
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'''
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Merge ed25519 key list to our database, comma seperated string
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'''
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try:
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retVal = False
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if newKeyList != False:
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for key in newKeyList.split(','):
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key = key.split('-')
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# Test if key is valid
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try:
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if len(key[0]) > 60 or len(key[1]) > 1000:
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logger.warn('%s or its pow value is too large.' % key[0])
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continue
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except IndexError:
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logger.warn('No pow token')
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continue
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try:
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value = base64.b64decode(key[1])
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except binascii.Error:
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continue
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# Load the pow token
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hashedKey = self._core._crypto.blake2bHash(key[0])
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powHash = self._core._crypto.blake2bHash(value + hashedKey)
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try:
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powHash = powHash.encode()
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except AttributeError:
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pass
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# if POW meets required difficulty, TODO make configurable/dynamic
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if powHash.startswith(b'0000'):
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# if we don't already have the key and its not our key, add it.
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if not key[0] in self._core.listPeers(randomOrder=False) and type(key) != None and key[0] != self._core._crypto.pubKey:
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if self._core.addPeer(key[0], key[1]):
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# Check if the peer has a set username already
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onionrusers.OnionrUser(self._core, key[0]).findAndSetID()
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retVal = True
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else:
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logger.warn("Failed to add key")
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else:
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pass
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#logger.debug('%s pow failed' % key[0])
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return retVal
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except Exception as error:
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logger.error('Failed to merge keys.', error=error)
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return False
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def mergeAdders(self, newAdderList):
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'''
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Merge peer adders list to our database
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'''
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try:
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retVal = False
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if newAdderList != False:
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for adder in newAdderList.split(','):
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adder = adder.strip()
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if not adder in self._core.listAdders(randomOrder = False) and adder != self.getMyAddress() and not self._core._blacklist.inBlacklist(adder):
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if not config.get('tor.v3onions') and len(adder) == 62:
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continue
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if self._core.addAddress(adder):
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# Check if we have the maxmium amount of allowed stored peers
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if config.get('peers.maxStoredPeers') > len(self._core.listAdders()):
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logger.info('Added %s to db.' % adder, timestamp = True)
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retVal = True
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else:
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logger.warn('Reached the maximum amount of peers in the net database as allowed by your config.')
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else:
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pass
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#logger.debug('%s is either our address or already in our DB' % adder)
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return retVal
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except Exception as error:
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logger.error('Failed to merge adders.', error = error)
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return False
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def getMyAddress(self):
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try:
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with open('./' + self._core.dataDir + 'hs/hostname', 'r') as hostname:
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return hostname.read().strip()
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except Exception as error:
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logger.error('Failed to read my address.', error = error)
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return None
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def localCommand(self, command, silent = True):
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'''
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Send a command to the local http API server, securely. Intended for local clients, DO NOT USE for remote peers.
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'''
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config.reload()
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self.getTimeBypassToken()
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# TODO: URL encode parameters, just as an extra measure. May not be needed, but should be added regardless.
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try:
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with open(self._core.dataDir + 'host.txt', 'r') as host:
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hostname = host.read()
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except FileNotFoundError:
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return False
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payload = 'http://%s:%s/client/?action=%s&token=%s&timingToken=%s' % (hostname, config.get('client.port'), command, config.get('client.hmac'), self.timingToken)
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try:
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retData = requests.get(payload).text
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except Exception as error:
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if not silent:
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logger.error('Failed to make local request (command: %s):%s' % (command, error))
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retData = False
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return retData
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def getPassword(self, message='Enter password: ', confirm = True):
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'''
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Get a password without showing the users typing and confirm the input
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'''
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# Get a password safely with confirmation and return it
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while True:
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print(message)
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pass1 = getpass.getpass()
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if confirm:
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print('Confirm password: ')
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pass2 = getpass.getpass()
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if pass1 != pass2:
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logger.error("Passwords do not match.")
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logger.readline()
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else:
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break
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else:
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break
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return pass1
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def getHumanReadableID(self, pub=''):
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'''gets a human readable ID from a public key'''
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if pub == '':
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pub = self._core._crypto.pubKey
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pub = base64.b16encode(base64.b32decode(pub)).decode()
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return '-'.join(pgpwords.wordify(pub))
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def getBlockMetadataFromData(self, blockData):
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'''
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accepts block contents as string, returns a tuple of metadata, meta (meta being internal metadata, which will be returned as an encrypted base64 string if it is encrypted, dict if not).
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'''
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meta = {}
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metadata = {}
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data = blockData
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try:
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blockData = blockData.encode()
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except AttributeError:
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pass
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try:
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metadata = json.loads(blockData[:blockData.find(b'\n')].decode())
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except json.decoder.JSONDecodeError:
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pass
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else:
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data = blockData[blockData.find(b'\n'):].decode()
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if not metadata['encryptType'] in ('asym', 'sym'):
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try:
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meta = json.loads(metadata['meta'])
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except KeyError:
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pass
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meta = metadata['meta']
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return (metadata, meta, data)
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def checkPort(self, port, host=''):
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'''
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Checks if a port is available, returns bool
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'''
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# inspired by https://www.reddit.com/r/learnpython/comments/2i4qrj/how_to_write_a_python_script_that_checks_to_see/ckzarux/
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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retVal = False
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try:
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sock.bind((host, port))
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except OSError as e:
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if e.errno is 98:
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retVal = True
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finally:
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sock.close()
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return retVal
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def checkIsIP(self, ip):
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'''
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Check if a string is a valid IPv4 address
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'''
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try:
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socket.inet_aton(ip)
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except:
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return False
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else:
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return True
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def processBlockMetadata(self, blockHash):
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'''
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Read metadata from a block and cache it to the block database
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'''
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myBlock = Block(blockHash, self._core)
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if myBlock.isEncrypted:
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logger.warn(myBlock.decrypt())
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if (myBlock.isEncrypted and myBlock.decrypted) or (not myBlock.isEncrypted):
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blockType = myBlock.getMetadata('type') # we would use myBlock.getType() here, but it is bugged with encrypted blocks
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signer = self.bytesToStr(myBlock.signer)
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valid = myBlock.verifySig()
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if myBlock.getMetadata('newFSKey') is not None:
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onionrusers.OnionrUser(self._core, signer).addForwardKey(myBlock.getMetadata('newFSKey'))
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try:
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if len(blockType) <= 10:
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self._core.updateBlockInfo(blockHash, 'dataType', blockType)
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onionrevents.event('processblocks', data = {'block': myBlock, 'type': blockType, 'signer': signer, 'validSig': valid}, onionr = None)
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except TypeError:
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logger.warn("Missing block information")
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pass
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# Set block expire time if specified
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try:
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expireTime = myBlock.getHeader('expire')
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assert len(str(int(expireTime))) < 20 # test that expire time is an integer of sane length (for epoch)
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except (AssertionError, ValueError, TypeError) as e:
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pass
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else:
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self._core.updateBlockInfo(blockHash, 'expire', expireTime)
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else:
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logger.info(myBlock.isEncrypted)
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logger.debug('Not processing metadata on encrypted block we cannot decrypt.')
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def escapeAnsi(self, line):
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'''
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Remove ANSI escape codes from a string with regex
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taken or adapted from: https://stackoverflow.com/a/38662876
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'''
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ansi_escape = re.compile(r'(\x9B|\x1B\[)[0-?]*[ -/]*[@-~]')
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return ansi_escape.sub('', line)
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def getBlockDBHash(self):
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'''
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Return a sha3_256 hash of the blocks DB
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'''
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try:
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with open(self._core.blockDB, 'rb') as data:
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data = data.read()
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hasher = hashlib.sha3_256()
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hasher.update(data)
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dataHash = hasher.hexdigest()
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return dataHash
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except Exception as error:
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logger.error('Failed to get block DB hash.', error=error)
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def hasBlock(self, hash):
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'''
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Check for new block in the list
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'''
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conn = sqlite3.connect(self._core.blockDB)
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c = conn.cursor()
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if not self.validateHash(hash):
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raise Exception("Invalid hash")
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for result in c.execute("SELECT COUNT() FROM hashes where hash='" + hash + "'"):
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if result[0] >= 1:
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conn.commit()
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conn.close()
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return True
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else:
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conn.commit()
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conn.close()
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return False
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def hasKey(self, key):
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'''
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Check for key in list of public keys
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'''
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return key in self._core.listPeers()
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def validateHash(self, data, length=64):
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'''
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Validate if a string is a valid hex formatted hash
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'''
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retVal = True
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if data == False or data == True:
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return False
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data = data.strip()
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if len(data) != length:
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retVal = False
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else:
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try:
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int(data, 16)
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except ValueError:
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retVal = False
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return retVal
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def validateMetadata(self, metadata, blockData):
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'''Validate metadata meets onionr spec (does not validate proof value computation), take in either dictionary or json string'''
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# TODO, make this check sane sizes
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retData = False
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# convert to dict if it is json string
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if type(metadata) is str:
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try:
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metadata = json.loads(metadata)
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except json.JSONDecodeError:
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pass
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# Validate metadata dict for invalid keys to sizes that are too large
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if type(metadata) is dict:
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for i in metadata:
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try:
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self._core.requirements.blockMetadataLengths[i]
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except KeyError:
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logger.warn('Block has invalid metadata key ' + i)
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break
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else:
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testData = metadata[i]
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try:
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testData = len(testData)
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except (TypeError, AttributeError) as e:
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testData = len(str(testData))
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if self._core.requirements.blockMetadataLengths[i] < testData:
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logger.warn('Block metadata key ' + i + ' exceeded maximum size')
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break
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if i == 'time':
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if not self.isIntegerString(metadata[i]):
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logger.warn('Block metadata time stamp is not integer string')
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break
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elif i == 'expire':
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try:
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assert int(metadata[i]) > self.getEpoch()
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except AssertionError:
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logger.warn('Block is expired')
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break
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else:
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# if metadata loop gets no errors, it does not break, therefore metadata is valid
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# make sure we do not have another block with the same data content (prevent data duplication and replay attacks)
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nonce = self._core._utils.bytesToStr(self._core._crypto.sha3Hash(blockData))
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try:
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with open(self._core.dataNonceFile, 'r') as nonceFile:
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if nonce in nonceFile.read():
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retData = False # we've seen that nonce before, so we can't pass metadata
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raise onionrexceptions.DataExists
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except FileNotFoundError:
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retData = True
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except onionrexceptions.DataExists:
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# do not set retData to True, because nonce has been seen before
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pass
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else:
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retData = True
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else:
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logger.warn('In call to utils.validateMetadata, metadata must be JSON string or a dictionary object')
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return retData
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def validatePubKey(self, key):
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'''
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Validate if a string is a valid base32 encoded Ed25519 key
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'''
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retVal = False
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try:
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nacl.signing.SigningKey(seed=key, encoder=nacl.encoding.Base32Encoder)
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except nacl.exceptions.ValueError:
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pass
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except base64.binascii.Error as err:
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pass
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else:
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retVal = True
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return retVal
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def isIntegerString(self, data):
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'''Check if a string is a valid base10 integer'''
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try:
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int(data)
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except ValueError:
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return False
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else:
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return True
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def validateID(self, id):
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'''
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Validate if an address is a valid tor or i2p hidden service
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'''
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try:
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idLength = len(id)
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retVal = True
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idNoDomain = ''
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peerType = ''
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# i2p b32 addresses are 60 characters long (including .b32.i2p)
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if idLength == 60:
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peerType = 'i2p'
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if not id.endswith('.b32.i2p'):
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retVal = False
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else:
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idNoDomain = id.split('.b32.i2p')[0]
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# Onion v2's are 22 (including .onion), v3's are 62 with .onion
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elif idLength == 22 or idLength == 62:
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peerType = 'onion'
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if not id.endswith('.onion'):
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retVal = False
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else:
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idNoDomain = id.split('.onion')[0]
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else:
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retVal = False
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if retVal:
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if peerType == 'i2p':
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try:
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id.split('.b32.i2p')[2]
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except:
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pass
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else:
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retVal = False
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elif peerType == 'onion':
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try:
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id.split('.onion')[2]
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except:
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pass
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else:
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retVal = False
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if not idNoDomain.isalnum():
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retVal = False
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return retVal
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except:
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return False
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def getPeerByHashId(self, hash):
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'''
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Return the pubkey of the user if known from the hash
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'''
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if self._core._crypto.pubKeyHashID() == hash:
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retData = self._core._crypto.pubKey
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return retData
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conn = sqlite3.connect(self._core.peerDB)
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c = conn.cursor()
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command = (hash,)
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retData = ''
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for row in c.execute('SELECT ID FROM peers where hashID=?', command):
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if row[0] != '':
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retData = row[0]
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return retData
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def isCommunicatorRunning(self, timeout = 5, interval = 0.1):
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try:
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runcheck_file = self._core.dataDir + '.runcheck'
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if os.path.isfile(runcheck_file):
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os.remove(runcheck_file)
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logger.debug('%s file appears to have existed before the run check.' % runcheck_file, timestamp = False)
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self._core.daemonQueueAdd('runCheck')
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starttime = time.time()
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while True:
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time.sleep(interval)
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if os.path.isfile(runcheck_file):
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os.remove(runcheck_file)
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return True
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elif time.time() - starttime >= timeout:
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return False
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except:
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return False
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|
|
def token(self, size = 32):
|
|
'''
|
|
Generates a secure random hex encoded token
|
|
'''
|
|
return binascii.hexlify(os.urandom(size))
|
|
|
|
def importNewBlocks(self, scanDir=''):
|
|
'''
|
|
This function is intended to scan for new blocks ON THE DISK and import them
|
|
'''
|
|
blockList = self._core.getBlockList()
|
|
if scanDir == '':
|
|
scanDir = self._core.blockDataLocation
|
|
if not scanDir.endswith('/'):
|
|
scanDir += '/'
|
|
for block in glob.glob(scanDir + "*.dat"):
|
|
if block.replace(scanDir, '').replace('.dat', '') not in blockList:
|
|
logger.info('Found new block on dist %s' % block)
|
|
with open(block, 'rb') as newBlock:
|
|
block = block.replace(scanDir, '').replace('.dat', '')
|
|
if self._core._crypto.sha3Hash(newBlock.read()) == block.replace('.dat', ''):
|
|
self._core.addToBlockDB(block.replace('.dat', ''), dataSaved=True)
|
|
logger.info('Imported block %s.' % block)
|
|
self._core._utils.processBlockMetadata(block)
|
|
else:
|
|
logger.warn('Failed to verify hash for %s' % block)
|
|
|
|
def progressBar(self, value = 0, endvalue = 100, width = None):
|
|
'''
|
|
Outputs a progress bar with a percentage. Write \n after use.
|
|
'''
|
|
|
|
if width is None or height is None:
|
|
width, height = shutil.get_terminal_size((80, 24))
|
|
|
|
bar_length = width - 6
|
|
|
|
percent = float(value) / endvalue
|
|
arrow = '─' * int(round(percent * bar_length)-1) + '>'
|
|
spaces = ' ' * (bar_length - len(arrow))
|
|
|
|
sys.stdout.write("\r┣{0}┫ {1}%".format(arrow + spaces, int(round(percent * 100))))
|
|
sys.stdout.flush()
|
|
|
|
def getEpoch(self):
|
|
'''returns epoch'''
|
|
return math.floor(time.time())
|
|
|
|
def doPostRequest(self, url, data={}, port=0, proxyType='tor'):
|
|
'''
|
|
Do a POST request through a local tor or i2p instance
|
|
'''
|
|
if proxyType == 'tor':
|
|
if port == 0:
|
|
port = self._core.torPort
|
|
proxies = {'http': 'socks4a://127.0.0.1:' + str(port), 'https': 'socks4a://127.0.0.1:' + str(port)}
|
|
elif proxyType == 'i2p':
|
|
proxies = {'http': 'http://127.0.0.1:4444'}
|
|
else:
|
|
return
|
|
headers = {'user-agent': 'PyOnionr'}
|
|
try:
|
|
proxies = {'http': 'socks4a://127.0.0.1:' + str(port), 'https': 'socks4a://127.0.0.1:' + str(port)}
|
|
r = requests.post(url, data=data, headers=headers, proxies=proxies, allow_redirects=False, timeout=(15, 30))
|
|
retData = r.text
|
|
except KeyboardInterrupt:
|
|
raise KeyboardInterrupt
|
|
except requests.exceptions.RequestException as e:
|
|
logger.debug('Error: %s' % str(e))
|
|
retData = False
|
|
return retData
|
|
|
|
def doGetRequest(self, url, port=0, proxyType='tor'):
|
|
'''
|
|
Do a get request through a local tor or i2p instance
|
|
'''
|
|
retData = False
|
|
if proxyType == 'tor':
|
|
if port == 0:
|
|
raise onionrexceptions.MissingPort('Socks port required for Tor HTTP get request')
|
|
proxies = {'http': 'socks4a://127.0.0.1:' + str(port), 'https': 'socks4a://127.0.0.1:' + str(port)}
|
|
elif proxyType == 'i2p':
|
|
proxies = {'http': 'http://127.0.0.1:4444'}
|
|
else:
|
|
return
|
|
headers = {'user-agent': 'PyOnionr'}
|
|
try:
|
|
proxies = {'http': 'socks4a://127.0.0.1:' + str(port), 'https': 'socks4a://127.0.0.1:' + str(port)}
|
|
r = requests.get(url, headers=headers, proxies=proxies, allow_redirects=False, timeout=(15, 30))
|
|
# Check server is using same API version as us
|
|
try:
|
|
if r.headers['api'] != str(API_VERSION):
|
|
raise onionrexceptions.InvalidAPIVersion
|
|
except KeyError:
|
|
raise onionrexceptions.InvalidAPIVersion
|
|
retData = r.text
|
|
except KeyboardInterrupt:
|
|
raise KeyboardInterrupt
|
|
except ValueError as e:
|
|
logger.debug('Failed to make request', error = e)
|
|
except onionrexceptions.InvalidAPIVersion:
|
|
logger.debug("Node is using different API version :(")
|
|
except requests.exceptions.RequestException as e:
|
|
if not 'ConnectTimeoutError' in str(e) and not 'Request rejected or failed' in str(e):
|
|
logger.debug('Error: %s' % str(e))
|
|
retData = False
|
|
return retData
|
|
|
|
def getNistBeaconSalt(self, torPort=0, rounding=3600):
|
|
'''
|
|
Get the token for the current hour from the NIST randomness beacon
|
|
'''
|
|
if torPort == 0:
|
|
try:
|
|
sys.argv[2]
|
|
except IndexError:
|
|
raise onionrexceptions.MissingPort('Missing Tor socks port')
|
|
retData = ''
|
|
curTime = self.getRoundedEpoch(rounding)
|
|
self.nistSaltTimestamp = curTime
|
|
data = self.doGetRequest('https://beacon.nist.gov/rest/record/' + str(curTime), port=torPort)
|
|
dataXML = minidom.parseString(data, forbid_dtd=True, forbid_entities=True, forbid_external=True)
|
|
try:
|
|
retData = dataXML.getElementsByTagName('outputValue')[0].childNodes[0].data
|
|
except ValueError:
|
|
logger.warn('Could not get NIST beacon value')
|
|
else:
|
|
self.powSalt = retData
|
|
return retData
|
|
|
|
def strToBytes(self, data):
|
|
try:
|
|
data = data.encode()
|
|
except AttributeError:
|
|
pass
|
|
return data
|
|
def bytesToStr(self, data):
|
|
try:
|
|
data = data.decode()
|
|
except AttributeError:
|
|
pass
|
|
return data
|
|
|
|
def checkNetwork(self, torPort=0):
|
|
'''Check if we are connected to the internet (through Tor)'''
|
|
retData = False
|
|
connectURLs = []
|
|
try:
|
|
with open('static-data/connect-check.txt', 'r') as connectTest:
|
|
connectURLs = connectTest.read().split(',')
|
|
|
|
for url in connectURLs:
|
|
if self.doGetRequest(url, port=torPort) != False:
|
|
retData = True
|
|
break
|
|
except FileNotFoundError:
|
|
pass
|
|
return retData
|
|
|
|
def size(path='.'):
|
|
'''
|
|
Returns the size of a folder's contents in bytes
|
|
'''
|
|
total = 0
|
|
if os.path.exists(path):
|
|
if os.path.isfile(path):
|
|
total = os.path.getsize(path)
|
|
else:
|
|
for entry in os.scandir(path):
|
|
if entry.is_file():
|
|
total += entry.stat().st_size
|
|
elif entry.is_dir():
|
|
total += size(entry.path)
|
|
return total
|
|
|
|
def humanSize(num, suffix='B'):
|
|
'''
|
|
Converts from bytes to a human readable format.
|
|
'''
|
|
for unit in ['', 'K', 'M', 'G', 'T', 'P', 'E', 'Z']:
|
|
if abs(num) < 1024.0:
|
|
return "%.1f %s%s" % (num, unit, suffix)
|
|
num /= 1024.0
|
|
return "%.1f %s%s" % (num, 'Yi', suffix) |