Onionr/onionr/core.py

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'''
Onionr - P2P Microblogging Platform & Social network
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Core Onionr library, useful for external programs. Handles peer & data processing
'''
'''
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 <https://www.gnu.org/licenses/>.
'''
import sqlite3, os, sys, time, math, base64, tarfile, getpass, simplecrypt, hashlib, nacl, logger, json, netcontroller, math, config
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from onionrblockapi import Block
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import onionrutils, onionrcrypto, onionrproofs, onionrevents as events, onionrexceptions, onionrvalues
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if sys.version_info < (3, 6):
try:
import sha3
except ModuleNotFoundError:
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logger.fatal('On Python 3 versions prior to 3.6.x, you need the sha3 module')
sys.exit(1)
class Core:
def __init__(self, torPort=0):
'''
Initialize Core Onionr library
'''
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try:
self.queueDB = 'data/queue.db'
self.peerDB = 'data/peers.db'
self.blockDB = 'data/blocks.db'
self.blockDataLocation = 'data/blocks/'
self.addressDB = 'data/address.db'
self.hsAdder = ''
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self.bootstrapFileLocation = 'static-data/bootstrap-nodes.txt'
self.bootstrapList = []
self.requirements = onionrvalues.OnionrValues()
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if not os.path.exists('data/'):
os.mkdir('data/')
if not os.path.exists('data/blocks/'):
os.mkdir('data/blocks/')
if not os.path.exists(self.blockDB):
self.createBlockDB()
if os.path.exists('data/hs/hostname'):
with open('data/hs/hostname', 'r') as hs:
self.hsAdder = hs.read()
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# Load bootstrap address list
if os.path.exists(self.bootstrapFileLocation):
with open(self.bootstrapFileLocation, 'r') as bootstrap:
bootstrap = bootstrap.read()
for i in bootstrap.split('\n'):
self.bootstrapList.append(i)
else:
logger.warn('Warning: address bootstrap file not found ' + self.bootstrapFileLocation)
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self._utils = onionrutils.OnionrUtils(self)
# Initialize the crypto object
self._crypto = onionrcrypto.OnionrCrypto(self)
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except Exception as error:
logger.error('Failed to initialize core Onionr library.', error=error)
logger.fatal('Cannot recover from error.')
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sys.exit(1)
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return
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def addPeer(self, peerID, powID, name=''):
'''
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Adds a public key to the key database (misleading function name)
'''
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# This function simply adds a peer to the DB
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if not self._utils.validatePubKey(peerID):
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return False
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if sys.getsizeof(powID) > 120:
logger.warn("POW token for pubkey base64 representation exceeded 120 bytes, is " + str(sys.getsizeof(powID)))
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return False
conn = sqlite3.connect(self.peerDB)
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hashID = self._crypto.pubKeyHashID(peerID)
c = conn.cursor()
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t = (peerID, name, 'unknown', hashID, powID)
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for i in c.execute("SELECT * FROM PEERS where id = '" + peerID + "';"):
try:
if i[0] == peerID:
conn.close()
return False
except ValueError:
pass
except IndexError:
pass
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c.execute('INSERT INTO peers (id, name, dateSeen, pow, hashID) VALUES(?, ?, ?, ?, ?);', t)
conn.commit()
conn.close()
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return True
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def addAddress(self, address):
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'''
Add an address to the address database (only tor currently)
'''
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if address == config.get('i2p.ownAddr', None):
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return False
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if self._utils.validateID(address):
conn = sqlite3.connect(self.addressDB)
c = conn.cursor()
# check if address is in database
# this is safe to do because the address is validated above, but we strip some chars here too just in case
address = address.replace('\'', '').replace(';', '').replace('"', '').replace('\\', '')
for i in c.execute("SELECT * FROM adders where address = '" + address + "';"):
try:
if i[0] == address:
logger.warn('Not adding existing address')
conn.close()
return False
except ValueError:
pass
except IndexError:
pass
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t = (address, 1)
c.execute('INSERT INTO adders (address, type) VALUES(?, ?);', t)
conn.commit()
conn.close()
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events.event('address_add', data = {'address': address}, onionr = None)
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return True
else:
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logger.debug('Invalid ID')
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return False
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def removeAddress(self, address):
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'''
Remove an address from the address database
'''
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if self._utils.validateID(address):
conn = sqlite3.connect(self.addressDB)
c = conn.cursor()
t = (address,)
c.execute('Delete from adders where address=?;', t)
conn.commit()
conn.close()
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events.event('address_remove', data = {'address': address}, onionr = None)
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return True
else:
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return False
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def removeBlock(self, block):
'''
remove a block from this node
'''
if self._utils.validateHash(block):
conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
t = (block,)
c.execute('Delete from hashes where hash=?;', t)
conn.commit()
conn.close()
try:
os.remove('data/blocks/' + block + '.dat')
except FileNotFoundError:
pass
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def createAddressDB(self):
'''
Generate the address database
types:
1: I2P b32 address
2: Tor v2 (like facebookcorewwwi.onion)
3: Tor v3
'''
conn = sqlite3.connect(self.addressDB)
c = conn.cursor()
c.execute('''CREATE TABLE adders(
address text,
type int,
knownPeer text,
speed int,
success int,
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DBHash text,
powValue text,
failure int,
lastConnect int
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);
''')
conn.commit()
conn.close()
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def createPeerDB(self):
'''
Generate the peer sqlite3 database and populate it with the peers table.
'''
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# generate the peer database
conn = sqlite3.connect(self.peerDB)
c = conn.cursor()
c.execute('''CREATE TABLE peers(
ID text not null,
name text,
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adders text,
blockDBHash text,
forwardKey text,
dateSeen not null,
bytesStored int,
trust int,
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pubkeyExchanged int,
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hashID text,
pow text not null);
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''')
conn.commit()
conn.close()
return
def createBlockDB(self):
'''
Create a database for blocks
hash - the hash of a block
dateReceived - the date the block was recieved, not necessarily when it was created
decrypted - if we can successfully decrypt the block (does not describe its current state)
dataType - data type of the block
dataFound - if the data has been found for the block
dataSaved - if the data has been saved for the block
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sig - optional signature by the author (not optional if author is specified)
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author - multi-round partial sha3-256 hash of authors public key
'''
if os.path.exists(self.blockDB):
raise Exception("Block database already exists")
conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
c.execute('''CREATE TABLE hashes(
hash text not null,
dateReceived int,
decrypted int,
dataType text,
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dataFound int,
dataSaved int,
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sig text,
author text
);
''')
conn.commit()
conn.close()
return
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def addToBlockDB(self, newHash, selfInsert=False, dataSaved=False):
'''
Add a hash value to the block db
Should be in hex format!
'''
if not os.path.exists(self.blockDB):
raise Exception('Block db does not exist')
if self._utils.hasBlock(newHash):
return
conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
currentTime = self._utils.getEpoch()
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if selfInsert or dataSaved:
selfInsert = 1
else:
selfInsert = 0
data = (newHash, currentTime, '', selfInsert)
c.execute('INSERT INTO hashes (hash, dateReceived, dataType, dataSaved) VALUES(?, ?, ?, ?);', data)
conn.commit()
conn.close()
return
def getData(self, hash):
'''
Simply return the data associated to a hash
'''
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try:
# logger.debug('Opening %s' % (str(self.blockDataLocation) + str(hash) + '.dat'))
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dataFile = open(self.blockDataLocation + hash + '.dat', 'rb')
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data = dataFile.read()
dataFile.close()
except FileNotFoundError:
data = False
return data
def setData(self, data):
'''
Set the data assciated with a hash
'''
data = data
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hasher = hashlib.sha3_256()
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if not type(data) is bytes:
data = data.encode()
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hasher.update(data)
dataHash = hasher.hexdigest()
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if type(dataHash) is bytes:
dataHash = dataHash.decode()
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blockFileName = self.blockDataLocation + dataHash + '.dat'
if os.path.exists(blockFileName):
pass # TODO: properly check if block is already saved elsewhere
#raise Exception("Data is already set for " + dataHash)
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else:
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blockFile = open(blockFileName, 'wb')
blockFile.write(data)
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blockFile.close()
conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
c.execute("UPDATE hashes SET dataSaved=1 WHERE hash = '" + dataHash + "';")
conn.commit()
conn.close()
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return dataHash
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def dataDirEncrypt(self, password):
'''
Encrypt the data directory on Onionr shutdown
'''
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if os.path.exists('data.tar'):
os.remove('data.tar')
tar = tarfile.open("data.tar", "w")
for name in ['data']:
tar.add(name)
tar.close()
tarData = open('data.tar', 'r', encoding = "ISO-8859-1").read()
encrypted = simplecrypt.encrypt(password, tarData)
open('data-encrypted.dat', 'wb').write(encrypted)
os.remove('data.tar')
return
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def dataDirDecrypt(self, password):
'''
Decrypt the data directory on startup
'''
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if not os.path.exists('data-encrypted.dat'):
return (False, 'encrypted archive does not exist')
data = open('data-encrypted.dat', 'rb').read()
try:
decrypted = simplecrypt.decrypt(password, data)
except simplecrypt.DecryptionException:
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return (False, 'wrong password (or corrupted archive)')
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else:
open('data.tar', 'wb').write(decrypted)
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tar = tarfile.open('data.tar')
tar.extractall()
tar.close()
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return (True, '')
def daemonQueue(self):
'''
Gives commands to the communication proccess/daemon by reading an sqlite3 database
This function intended to be used by the client. Queue to exchange data between "client" and server.
'''
retData = False
if not os.path.exists(self.queueDB):
self.makeDaemonDB()
else:
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conn = sqlite3.connect(self.queueDB)
c = conn.cursor()
try:
for row in c.execute('SELECT command, data, date, min(ID) FROM commands group by id'):
retData = row
break
except sqlite3.OperationalError:
self.makeDaemonDB()
else:
if retData != False:
c.execute('DELETE FROM commands WHERE id=?;', (retData[3],))
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conn.commit()
conn.close()
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events.event('queue_pop', data = {'data': retData}, onionr = None)
return retData
def makeDaemonDB(self):
'''generate the daemon queue db'''
conn = sqlite3.connect(self.queueDB)
c = conn.cursor()
# Create table
c.execute('''CREATE TABLE commands
(id integer primary key autoincrement, command text, data text, date text)''')
conn.commit()
conn.close()
def daemonQueueAdd(self, command, data=''):
'''
Add a command to the daemon queue, used by the communication daemon (communicator.py)
'''
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# Intended to be used by the web server
date = self._utils.getEpoch()
conn = sqlite3.connect(self.queueDB)
c = conn.cursor()
t = (command, data, date)
c.execute('INSERT INTO commands (command, data, date) VALUES(?, ?, ?)', t)
conn.commit()
conn.close()
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events.event('queue_push', data = {'command': command, 'data': data}, onionr = None)
return
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def clearDaemonQueue(self):
'''
Clear the daemon queue (somewhat dangerous)
'''
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conn = sqlite3.connect(self.queueDB)
c = conn.cursor()
try:
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c.execute('DELETE FROM commands;')
conn.commit()
except:
pass
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conn.close()
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events.event('queue_clear', onionr = None)
return
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def listAdders(self, randomOrder=True, i2p=True):
'''
Return a list of addresses
'''
conn = sqlite3.connect(self.addressDB)
c = conn.cursor()
if randomOrder:
addresses = c.execute('SELECT * FROM adders ORDER BY RANDOM();')
else:
addresses = c.execute('SELECT * FROM adders;')
addressList = []
for i in addresses:
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addressList.append(i[0])
conn.close()
return addressList
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def listPeers(self, randomOrder=True, getPow=False):
'''
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Return a list of public keys (misleading function name)
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randomOrder determines if the list should be in a random order
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'''
conn = sqlite3.connect(self.peerDB)
c = conn.cursor()
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payload = ""
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if randomOrder:
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payload = 'SELECT * FROM peers ORDER BY RANDOM();'
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else:
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payload = 'SELECT * FROM peers;'
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peerList = []
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for i in c.execute(payload):
try:
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if len(i[0]) != 0:
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if getPow:
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peerList.append(i[0] + '-' + i[1])
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else:
peerList.append(i[0])
except TypeError:
pass
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if getPow:
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try:
peerList.append(self._crypto.pubKey + '-' + self._crypto.pubKeyPowToken)
except TypeError:
pass
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else:
peerList.append(self._crypto.pubKey)
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conn.close()
return peerList
def getPeerInfo(self, peer, info):
'''
Get info about a peer from their database entry
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id text 0
name text, 1
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adders text, 2
forwardKey text, 3
dateSeen not null, 4
bytesStored int, 5
trust int 6
pubkeyExchanged int 7
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hashID text 8
pow text 9
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'''
conn = sqlite3.connect(self.peerDB)
c = conn.cursor()
command = (peer,)
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infoNumbers = {'id': 0, 'name': 1, 'adders': 2, 'forwardKey': 3, 'dateSeen': 4, 'bytesStored': 5, 'trust': 6, 'pubkeyExchanged': 7, 'hashID': 8}
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info = infoNumbers[info]
iterCount = 0
retVal = ''
for row in c.execute('SELECT * from peers where id=?;', command):
for i in row:
if iterCount == info:
retVal = i
break
else:
iterCount += 1
conn.close()
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return retVal
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def setPeerInfo(self, peer, key, data):
'''
Update a peer for a key
'''
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conn = sqlite3.connect(self.peerDB)
c = conn.cursor()
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command = (data, peer)
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# TODO: validate key on whitelist
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if key not in ('id', 'name', 'pubkey', 'blockDBHash', 'forwardKey', 'dateSeen', 'bytesStored', 'trust'):
raise Exception("Got invalid database key when setting peer info")
c.execute('UPDATE peers SET ' + key + ' = ? WHERE id=?', command)
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conn.commit()
conn.close()
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return
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def getAddressInfo(self, address, info):
'''
Get info about an address from its database entry
address text, 0
type int, 1
knownPeer text, 2
speed int, 3
success int, 4
DBHash text, 5
failure int 6
lastConnect 7
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'''
conn = sqlite3.connect(self.addressDB)
c = conn.cursor()
command = (address,)
infoNumbers = {'address': 0, 'type': 1, 'knownPeer': 2, 'speed': 3, 'success': 4, 'DBHash': 5, 'failure': 6, 'lastConnect': 7}
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info = infoNumbers[info]
iterCount = 0
retVal = ''
for row in c.execute('SELECT * from adders where address=?;', command):
for i in row:
if iterCount == info:
retVal = i
break
else:
iterCount += 1
conn.close()
return retVal
def setAddressInfo(self, address, key, data):
'''
Update an address for a key
'''
conn = sqlite3.connect(self.addressDB)
c = conn.cursor()
command = (data, address)
# TODO: validate key on whitelist
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if key not in ('address', 'type', 'knownPeer', 'speed', 'success', 'DBHash', 'failure', 'lastConnect'):
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raise Exception("Got invalid database key when setting address info")
c.execute('UPDATE adders SET ' + key + ' = ? WHERE address=?', command)
conn.commit()
conn.close()
return
def handle_direct_connection(self, data):
'''
Handles direct messages
'''
try:
data = json.loads(data)
# TODO: Determine the sender, verify, etc
if ('callback' in data) and (data['callback'] is True):
# then this is a response to the message we sent earlier
self.daemonQueueAdd('checkCallbacks', json.dumps(data))
else:
# then we should handle it and respond accordingly
self.daemonQueueAdd('incomingDirectConnection', json.dumps(data))
except Exception as e:
logger.warn('Failed to handle incoming direct message: %s' % str(e))
return
def getBlockList(self, unsaved = False): # TODO: Use unsaved
'''
Get list of our blocks
'''
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conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
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if unsaved:
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execute = 'SELECT hash FROM hashes WHERE dataSaved != 1 ORDER BY RANDOM();'
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else:
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execute = 'SELECT hash FROM hashes ORDER BY RANDOM();'
rows = list()
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for row in c.execute(execute):
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for i in row:
rows.append(i)
return rows
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def getBlockDate(self, blockHash):
'''
Returns the date a block was received
'''
conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
execute = 'SELECT dateReceived FROM hashes WHERE hash=?;'
args = (blockHash,)
for row in c.execute(execute, args):
for i in row:
return int(i)
return None
def getBlocksByType(self, blockType):
'''
Returns a list of blocks by the type
'''
conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
execute = 'SELECT hash FROM hashes WHERE dataType=?;'
args = (blockType,)
rows = list()
for row in c.execute(execute, args):
for i in row:
rows.append(i)
return rows
def setBlockType(self, hash, blockType):
'''
Sets the type of block
'''
conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
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c.execute("UPDATE hashes SET dataType='" + blockType + "' WHERE hash = '" + hash + "';")
conn.commit()
conn.close()
return
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def updateBlockInfo(self, hash, key, data):
'''
sets info associated with a block
'''
if key not in ('dateReceived', 'decrypted', 'dataType', 'dataFound', 'dataSaved', 'sig', 'author'):
return False
conn = sqlite3.connect(self.blockDB)
c = conn.cursor()
args = (data, hash)
c.execute("UPDATE hashes SET " + key + " = ? where hash = ?;", args)
conn.commit()
conn.close()
return True
def insertBlock(self, data, header='txt', sign=False, encryptType='', symKey='', asymPeer='', meta = {}):
'''
Inserts a block into the network
encryptType must be specified to encrypt a block
'''
try:
data.decode()
except AttributeError:
data = data.encode()
retData = ''
signature = ''
signer = ''
metadata = {}
# only use header if not set in provided meta
try:
meta['type']
except KeyError:
meta['type'] = header # block type
jsonMeta = json.dumps(meta)
if encryptType in ('asym', 'sym', ''):
metadata['encryptType'] = encryptType
else:
raise onionrexceptions.InvalidMetadata('encryptType must be asym or sym, or blank')
try:
data = data.encode()
except AttributeError:
pass
# sign before encrypt, as unauthenticated crypto should not be a problem here
if sign:
signature = self._crypto.edSign(jsonMeta.encode() + data, key=self._crypto.privKey, encodeResult=True)
signer = self._crypto.pubKeyHashID()
if len(jsonMeta) > 1000:
raise onionrexceptions.InvalidMetadata('meta in json encoded form must not exceed 1000 bytes')
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# encrypt block metadata/sig/content
if encryptType == 'sym':
if len(symKey) < self.requirements.passwordLength:
raise onionrexceptions.SecurityError('Weak encryption key')
jsonMeta = self._crypto.symmetricEncrypt(jsonMeta, key=symKey, returnEncoded=True)
data = self._crypto.symmetricEncrypt(data, key=symKey, returnEncoded=True)
signature = self._crypto.symmetricEncrypt(signature, key=symKey, returnEncoded=True)
signer = self._crypto.symmetricEncrypt(signer, key=symKey, returnEncoded=True)
elif encryptType == 'asym':
if self._utils.validatePubKey(asymPeer):
jsonMeta = self._crypto.pubKeyEncrypt(jsonMeta, asymPeer, encodedData=True)
data = self._crypto.pubKeyEncrypt(data, asymPeer, encodedData=True)
signature = self._crypto.pubKeyEncrypt(signature, asymPeer, encodedData=True)
else:
raise onionrexceptions.InvalidPubkey(asymPeer + ' is not a valid base32 encoded ed25519 key')
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powProof = onionrproofs.POW(data)
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# wait for proof to complete
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powToken = powProof.waitForResult()
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powToken = base64.b64encode(powToken[1])
try:
powToken = powToken.decode()
except AttributeError:
pass
# compile metadata
metadata['meta'] = jsonMeta
metadata['sig'] = signature
metadata['signer'] = signer
metadata['powRandomToken'] = powToken
metadata['time'] = str(self._utils.getEpoch())
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payload = json.dumps(metadata).encode() + b'\n' + data
retData = self.setData(payload)
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self.addToBlockDB(retData, selfInsert=True, dataSaved=True)
self.setBlockType(retData, meta['type'])
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return retData
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def introduceNode(self):
'''
Introduces our node into the network by telling X many nodes our HS address
'''
if(self._utils.isCommunicatorRunning()):
announceAmount = 2
nodeList = self.listAdders()
if len(nodeList) == 0:
for i in self.bootstrapList:
if self._utils.validateID(i):
self.addAddress(i)
nodeList.append(i)
if announceAmount > len(nodeList):
announceAmount = len(nodeList)
for i in range(announceAmount):
self.daemonQueueAdd('announceNode', nodeList[i])
events.event('introduction', onionr = None)
return True
else:
logger.error('Onionr daemon is not running.')
return False
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return