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