Onionr/onionr/onionrblacklist.py

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'''
Onionr - P2P Microblogging Platform & Social network.
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
class OnionrBlackList:
def __init__(self, coreInst):
self.blacklistDB = 'data/blacklist.db'
self._core = coreInst
if not os.path.exists(self.blacklistDB):
self.generateDB()
return
def inBlacklist(self, data):
hashed = self._core._utils.bytesToStr(self._core._crypto.sha3Hash(data))
retData = False
if not hashed.isalnum():
raise Exception("Hashed data is not alpha numeric")
for i in self._dbExecute("select * from blacklist where hash='%s'" % (hashed,)):
retData = True # this only executes if an entry is present by that hash
break
return retData
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def _dbExecute(self, toExec):
conn = sqlite3.connect(self.blacklistDB)
c = conn.cursor()
retData = c.execute(toExec)
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conn.commit()
return retData
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def deleteBeforeDate(self, date):
# TODO, delete blacklist entries before date
return
def generateDB(self):
self._dbExecute('''CREATE TABLE blacklist(
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hash text primary key not null,
type text
);
''')
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
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def addToDB(self, data):
'''Add to the blacklist. Intended to be block hash, block data, peers, or transport addresses'''
# we hash the data so we can remove data entirely from our node's disk
hashed = self._core._utils.bytesToStr(self._core._crypto.sha3Hash(data))
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if not hashed.isalnum():
raise Exception("Hashed data is not alpha numeric")
insert = (hashed,)
self._dbExecute("insert into blacklist (hash) VALUES('%s');" % (hashed,))