onionr/onionr/onionrblacklist.py

124 lines
4.1 KiB
Python
Executable File

'''
Onionr - Private P2P Communication
This file handles maintenence of a blacklist database, for blocks and peers
'''
'''
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, logger
from onionrutils import epoch, bytesconverter
class OnionrBlackList:
def __init__(self, coreInst):
self.blacklistDB = coreInst.dataDir + 'blacklist.db'
self._core = coreInst
if not os.path.exists(self.blacklistDB):
self.generateDB()
return
def inBlacklist(self, data):
hashed = bytesconverter.bytes_to_str(self._core._crypto.sha3Hash(data))
retData = False
if not hashed.isalnum():
raise Exception("Hashed data is not alpha numeric")
if len(hashed) > 64:
raise Exception("Hashed data is too large")
for i in self._dbExecute("SELECT * FROM blacklist WHERE hash = ?", (hashed,)):
retData = True # this only executes if an entry is present by that hash
break
return retData
def _dbExecute(self, toExec, params = ()):
conn = sqlite3.connect(self.blacklistDB)
c = conn.cursor()
retData = c.execute(toExec, params)
conn.commit()
return retData
def deleteBeforeDate(self, date):
# TODO, delete blacklist entries before date
return
def deleteExpired(self, dataType=0):
'''Delete expired entries'''
deleteList = []
curTime = epoch.get_epoch()
try:
int(dataType)
except AttributeError:
raise TypeError("dataType must be int")
for i in self._dbExecute('SELECT * FROM blacklist WHERE dataType = ?', (dataType,)):
if i[1] == dataType:
if (curTime - i[2]) >= i[3]:
deleteList.append(i[0])
for thing in deleteList:
self._dbExecute("DELETE FROM blacklist WHERE hash = ?", (thing,))
def generateDB(self):
self._dbExecute('''CREATE TABLE blacklist(
hash text primary key not null,
dataType int,
blacklistDate int,
expire int
);
''')
return
def clearDB(self):
self._dbExecute('''DELETE FROM blacklist;''')
def getList(self):
data = self._dbExecute('SELECT * FROM blacklist')
myList = []
for i in data:
myList.append(i[0])
return myList
def addToDB(self, data, dataType=0, expire=0):
'''Add to the blacklist. Intended to be block hash, block data, peers, or transport addresses
0=block
1=peer
2=pubkey
'''
# we hash the data so we can remove data entirely from our node's disk
hashed = bytesconverter.bytes_to_str(self._core._crypto.sha3Hash(data))
if len(hashed) > 64:
raise Exception("Hashed data is too large")
if not hashed.isalnum():
raise Exception("Hashed data is not alpha numeric")
try:
int(dataType)
except ValueError:
raise Exception("dataType is not int")
try:
int(expire)
except ValueError:
raise Exception("expire is not int")
if self.inBlacklist(hashed):
return
insert = (hashed,)
blacklistDate = epoch.get_epoch()
try:
self._dbExecute("INSERT INTO blacklist (hash, dataType, blacklistDate, expire) VALUES(?, ?, ?, ?);", (str(hashed), dataType, blacklistDate, expire))
except sqlite3.IntegrityError:
pass