Onionr/onionr/onionrutils.py

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'''
Onionr - P2P Microblogging Platform & Social network
OnionrUtils offers various useful functions to Onionr. Relatively misc.
'''
'''
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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/>.
'''
# 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
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import nacl.signing, nacl.encoding
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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')
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sys.exit(1)
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class OnionrUtils:
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'''
Various useful function
'''
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def __init__(self, coreInstance):
self.fingerprintFile = 'data/own-fingerprint.txt'
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self._core = coreInstance
self.timingToken = ''
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return
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def getTimeBypassToken(self):
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try:
if os.path.exists('data/time-bypass.txt'):
with open('data/time-bypass.txt', 'r') as bypass:
self.timingToken = bypass.read()
except Exception as error:
logger.error('Failed to fetch time bypass token.', error=error)
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def sendPM(self, pubkey, message):
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'''
High level function to encrypt a message to a peer and insert it as a block
'''
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try:
# We sign PMs here rather than in core.insertBlock in order to mask the sender's pubkey
payload = {'sig': '', 'msg': '', 'id': self._core._crypto.pubKey}
sign = self._core._crypto.edSign(message, self._core._crypto.privKey, encodeResult=True)
#encrypted = self._core._crypto.pubKeyEncrypt(message, pubkey, anonymous=True, encodedData=True).decode()
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payload['sig'] = sign
payload['msg'] = message
payload = json.dumps(payload)
message = payload
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encrypted = self._core._crypto.pubKeyEncrypt(message, pubkey, anonymous=True, encodedData=True).decode()
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block = self._core.insertBlock(encrypted, header='pm', sign=False)
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if block == '':
logger.error('Could not send PM')
else:
logger.info('Sent PM, hash: ' + block)
except Exception as error:
logger.error('Failed to send PM.', error=error)
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return
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def incrementAddressSuccess(self, address):
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'''
Increase the recorded sucesses for an address
'''
increment = self._core.getAddressInfo(address, 'success') + 1
self._core.setAddressInfo(address, 'success', increment)
return
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def decrementAddressSuccess(self, address):
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'''
Decrease the recorded sucesses for an address
'''
increment = self._core.getAddressInfo(address, 'success') - 1
self._core.setAddressInfo(address, 'success', increment)
return
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def mergeKeys(self, newKeyList):
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'''
Merge ed25519 key list to our database
'''
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try:
retVal = False
if newKeyList != False:
for key in newKeyList.split(','):
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key = key.split('-')
if len(key[0]) > 60 or len(key[1]) > 1000:
logger.warn(key[0] + ' or its pow value is too large.')
continue
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if self._core._crypto.blake2bHash(base64.b64decode(key[1]) + key[0].encode()).startswith('0000'):
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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:
if self._core.addPeer(key[0], key[1]):
retVal = True
else:
logger.warn(key[0] + 'pow failed')
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return retVal
except Exception as error:
logger.error('Failed to merge keys.', error=error)
return False
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def mergeAdders(self, newAdderList):
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'''
Merge peer adders list to our database
'''
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try:
retVal = False
if newAdderList != False:
for adder in newAdderList.split(','):
if not adder in self._core.listAdders(randomOrder=False) and adder.strip() != self.getMyAddress():
if self._core.addAddress(adder):
logger.info('Added ' + adder + ' to db.', timestamp=True)
retVal = True
else:
logger.debug(adder + " is either our address or already in our DB")
return retVal
except Exception as error:
logger.error('Failed to merge adders.', error=error)
return False
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def getMyAddress(self):
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try:
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with open('./data/hs/hostname', 'r') as hostname:
return hostname.read().strip()
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except Exception as error:
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):
'''
Send a command to the local http API server, securely. Intended for local clients, DO NOT USE for remote peers.
'''
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config.reload()
self.getTimeBypassToken()
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# TODO: URL encode parameters, just as an extra measure. May not be needed, but should be added regardless.
try:
retData = requests.get('http://' + open('data/host.txt', 'r').read() + ':' + str(config.get('client')['port']) + '/client/?action=' + command + '&token=' + str(config.get('client')['client_hmac']) + '&timingToken=' + self.timingToken).text
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except Exception as error:
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if not silent:
logger.error('Failed to make local request (command: ' + str(command) + ').', error=error)
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retData = False
return retData
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def getPassword(self, message='Enter password: ', confirm = True):
'''
Get a password without showing the users typing and confirm the input
'''
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# Get a password safely with confirmation and return it
while True:
print(message)
pass1 = getpass.getpass()
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if confirm:
print('Confirm password: ')
pass2 = getpass.getpass()
if pass1 != pass2:
logger.error("Passwords do not match.")
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logger.readline()
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else:
break
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else:
break
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return pass1
def checkPort(self, port, host=''):
'''
Checks if a port is available, returns bool
'''
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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/
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
retVal = False
try:
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sock.bind((host, port))
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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
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def getBlockDBHash(self):
'''
Return a sha3_256 hash of the blocks DB
'''
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try:
with open(self._core.blockDB, 'rb') as data:
data = data.read()
hasher = hashlib.sha3_256()
hasher.update(data)
dataHash = hasher.hexdigest()
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return dataHash
except Exception as error:
logger.error('Failed to get block DB hash.', error=error)
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def hasBlock(self, hash):
'''
Check for new block in the list
'''
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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
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def hasKey(self, key):
'''
Check for key in list of public keys
'''
return key in self._core.listPeers()
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def validateHash(self, data, length=64):
'''
Validate if a string is a valid hex formatted hash
'''
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retVal = True
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if data == False or data == True:
return False
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data = data.strip()
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if len(data) != length:
retVal = False
else:
try:
int(data, 16)
except ValueError:
retVal = False
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return retVal
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def validatePubKey(self, key):
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'''
Validate if a string is a valid base32 encoded Ed25519 key
'''
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retVal = False
try:
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nacl.signing.SigningKey(seed=key, encoder=nacl.encoding.Base32Encoder)
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except nacl.exceptions.ValueError:
pass
except base64.binascii.Error as err:
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pass
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else:
retVal = True
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return retVal
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def validateID(self, id):
'''
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Validate if an address is a valid tor or i2p hidden service
'''
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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'):
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retVal = False
else:
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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'):
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retVal = False
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else:
idNoDomain = id.split('.onion')[0]
else:
retVal = False
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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
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return retVal
except:
return False
def loadPMs(self):
'''
Find, decrypt, and return array of PMs (array of dictionary, {from, text})
'''
#blocks = self._core.getBlockList().split('\n')
blocks = self._core.getBlocksByType('pm')
message = ''
sender = ''
for i in blocks:
if len (i) == 0:
continue
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try:
with open('data/blocks/' + i + '.dat', 'r') as potentialMessage:
potentialMessage = potentialMessage.read()
blockMetadata = json.loads(potentialMessage[:potentialMessage.rfind('}') + 1])
blockContent = potentialMessage[potentialMessage.rfind('}') + 1:]
try:
message = self._core._crypto.pubKeyDecrypt(blockContent, encodedData=True, anonymous=True)
except nacl.exceptions.CryptoError as e:
pass
else:
try:
message = message.decode()
except AttributeError:
pass
try:
message = json.loads(message)
except json.decoder.JSONDecodeError:
pass
else:
print('--------------------')
logger.info('Decrypted ' + i + ':')
logger.info(message["msg"])
signer = message["id"]
sig = message["sig"]
if self.validatePubKey(signer):
if self._core._crypto.edVerify(message["msg"], signer, sig, encodedData=True):
logger.info("Good signature by " + signer)
else:
logger.warn("Bad signature by " + signer)
else:
logger.warn("Bad sender id: " + signer)
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except FileNotFoundError:
pass
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except Exception as error:
logger.error('Failed to open block ' + str(i) + '.', error=error)
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return
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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]
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return retData
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def isCommunicatorRunning(self, timeout = 5, interval = 0.1):
try:
runcheck_file = 'data/.runcheck'
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if os.path.isfile(runcheck_file):
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')
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):
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return binascii.hexlify(os.urandom(size))