Onionr/onionr/onionrblacklist.py

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'''
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Onionr - Private P2P Communication
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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/>.
'''
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import sqlite3, os
import logger, onionrcrypto
from onionrutils import epoch, bytesconverter
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from coredb import dbfiles
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class OnionrBlackList:
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def __init__(self):
self.blacklistDB = dbfiles.blacklist_db
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if not os.path.exists(dbfiles.blacklist_db):
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self.generateDB()
return
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def inBlacklist(self, data):
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hashed = bytesconverter.bytes_to_str(onionrcrypto.hashers.sha3_hash(data))
retData = False
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if not hashed.isalnum():
raise Exception("Hashed data is not alpha numeric")
if len(hashed) > 64:
raise Exception("Hashed data is too large")
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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
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return retData
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def _dbExecute(self, toExec, params = ()):
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conn = sqlite3.connect(self.blacklistDB)
c = conn.cursor()
retData = c.execute(toExec, params)
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conn.commit()
return retData
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def deleteBeforeDate(self, date):
# TODO, delete blacklist entries before date
return
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def deleteExpired(self, dataType=0):
'''Delete expired entries'''
deleteList = []
curTime = epoch.get_epoch()
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try:
int(dataType)
except AttributeError:
raise TypeError("dataType must be int")
for i in self._dbExecute('SELECT * FROM blacklist WHERE dataType = ?', (dataType,)):
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if i[1] == dataType:
if (curTime - i[2]) >= i[3]:
deleteList.append(i[0])
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for thing in deleteList:
self._dbExecute("DELETE FROM blacklist WHERE hash = ?", (thing,))
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def generateDB(self):
self._dbExecute('''CREATE TABLE blacklist(
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hash text primary key not null,
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dataType int,
blacklistDate int,
expire int
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);
''')
return
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def clearDB(self):
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self._dbExecute('''DELETE FROM blacklist;''')
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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):
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'''Add to the blacklist. Intended to be block hash, block data, peers, or transport addresses
0=block
1=peer
2=pubkey
'''
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# we hash the data so we can remove data entirely from our node's disk
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hashed = bytesconverter.bytes_to_str(crypto.sha3Hash(data))
if len(hashed) > 64:
raise Exception("Hashed data is too large")
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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
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insert = (hashed,)
blacklistDate = epoch.get_epoch()
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try:
self._dbExecute("INSERT INTO blacklist (hash, dataType, blacklistDate, expire) VALUES(?, ?, ?, ?);", (str(hashed), dataType, blacklistDate, expire))
except sqlite3.IntegrityError:
pass