mirror of https://gitlab.com/bashrc2/epicyon
722 lines
27 KiB
Python
722 lines
27 KiB
Python
__filename__ = "blocking.py"
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__author__ = "Bob Mottram"
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__license__ = "AGPL3+"
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__version__ = "1.2.0"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@freedombone.net"
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__status__ = "Production"
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import os
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import json
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from datetime import datetime
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from utils import getCachedPostFilename
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from utils import loadJson
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from utils import saveJson
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from utils import fileLastModified
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from utils import setConfigParam
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from utils import hasUsersPath
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from utils import getFullDomain
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from utils import removeIdEnding
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from utils import isEvil
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from utils import locatePost
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from utils import evilIncarnate
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from utils import getDomainFromActor
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from utils import getNicknameFromActor
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def addGlobalBlock(baseDir: str,
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blockNickname: str, blockDomain: str) -> bool:
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"""Global block which applies to all accounts
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"""
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blockingFilename = baseDir + '/accounts/blocking.txt'
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if not blockNickname.startswith('#'):
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# is the handle already blocked?
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blockHandle = blockNickname + '@' + blockDomain
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if os.path.isfile(blockingFilename):
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if blockHandle in open(blockingFilename).read():
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return False
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# block an account handle or domain
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blockFile = open(blockingFilename, "a+")
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if blockFile:
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blockFile.write(blockHandle + '\n')
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blockFile.close()
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else:
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blockHashtag = blockNickname
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# is the hashtag already blocked?
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if os.path.isfile(blockingFilename):
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if blockHashtag + '\n' in open(blockingFilename).read():
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return False
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# block a hashtag
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blockFile = open(blockingFilename, "a+")
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if blockFile:
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blockFile.write(blockHashtag + '\n')
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blockFile.close()
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return True
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def addBlock(baseDir: str, nickname: str, domain: str,
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blockNickname: str, blockDomain: str) -> bool:
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"""Block the given account
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"""
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if ':' in domain:
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domain = domain.split(':')[0]
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blockingFilename = baseDir + '/accounts/' + \
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nickname + '@' + domain + '/blocking.txt'
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blockHandle = blockNickname + '@' + blockDomain
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if os.path.isfile(blockingFilename):
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if blockHandle in open(blockingFilename).read():
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return False
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blockFile = open(blockingFilename, "a+")
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blockFile.write(blockHandle + '\n')
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blockFile.close()
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return True
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def removeGlobalBlock(baseDir: str,
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unblockNickname: str,
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unblockDomain: str) -> bool:
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"""Unblock the given global block
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"""
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unblockingFilename = baseDir + '/accounts/blocking.txt'
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if not unblockNickname.startswith('#'):
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unblockHandle = unblockNickname + '@' + unblockDomain
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if os.path.isfile(unblockingFilename):
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if unblockHandle in open(unblockingFilename).read():
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with open(unblockingFilename, 'r') as fp:
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with open(unblockingFilename + '.new', 'w+') as fpnew:
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for line in fp:
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handle = line.replace('\n', '').replace('\r', '')
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if unblockHandle not in line:
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fpnew.write(handle + '\n')
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if os.path.isfile(unblockingFilename + '.new'):
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os.rename(unblockingFilename + '.new', unblockingFilename)
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return True
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else:
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unblockHashtag = unblockNickname
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if os.path.isfile(unblockingFilename):
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if unblockHashtag + '\n' in open(unblockingFilename).read():
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with open(unblockingFilename, 'r') as fp:
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with open(unblockingFilename + '.new', 'w+') as fpnew:
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for line in fp:
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blockLine = \
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line.replace('\n', '').replace('\r', '')
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if unblockHashtag not in line:
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fpnew.write(blockLine + '\n')
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if os.path.isfile(unblockingFilename + '.new'):
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os.rename(unblockingFilename + '.new', unblockingFilename)
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return True
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return False
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def removeBlock(baseDir: str, nickname: str, domain: str,
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unblockNickname: str, unblockDomain: str) -> bool:
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"""Unblock the given account
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"""
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if ':' in domain:
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domain = domain.split(':')[0]
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unblockingFilename = baseDir + '/accounts/' + \
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nickname + '@' + domain + '/blocking.txt'
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unblockHandle = unblockNickname + '@' + unblockDomain
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if os.path.isfile(unblockingFilename):
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if unblockHandle in open(unblockingFilename).read():
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with open(unblockingFilename, 'r') as fp:
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with open(unblockingFilename + '.new', 'w+') as fpnew:
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for line in fp:
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handle = line.replace('\n', '').replace('\r', '')
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if unblockHandle not in line:
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fpnew.write(handle + '\n')
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if os.path.isfile(unblockingFilename + '.new'):
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os.rename(unblockingFilename + '.new', unblockingFilename)
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return True
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return False
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def isBlockedHashtag(baseDir: str, hashtag: str) -> bool:
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"""Is the given hashtag blocked?
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"""
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# avoid very long hashtags
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if len(hashtag) > 32:
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return True
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globalBlockingFilename = baseDir + '/accounts/blocking.txt'
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if os.path.isfile(globalBlockingFilename):
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hashtag = hashtag.strip('\n').strip('\r')
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if not hashtag.startswith('#'):
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hashtag = '#' + hashtag
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if hashtag + '\n' in open(globalBlockingFilename).read():
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return True
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return False
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def getDomainBlocklist(baseDir: str) -> str:
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"""Returns all globally blocked domains as a string
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This can be used for fast matching to mitigate flooding
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"""
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blockedStr = ''
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evilDomains = evilIncarnate()
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for evil in evilDomains:
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blockedStr += evil + '\n'
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globalBlockingFilename = baseDir + '/accounts/blocking.txt'
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if not os.path.isfile(globalBlockingFilename):
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return blockedStr
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with open(globalBlockingFilename, 'r') as fpBlocked:
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blockedStr += fpBlocked.read()
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return blockedStr
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def isBlockedDomain(baseDir: str, domain: str) -> bool:
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"""Is the given domain blocked?
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"""
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if '.' not in domain:
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return False
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if isEvil(domain):
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return True
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# by checking a shorter version we can thwart adversaries
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# who constantly change their subdomain
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sections = domain.split('.')
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noOfSections = len(sections)
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shortDomain = None
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if noOfSections > 2:
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shortDomain = domain[noOfSections-2] + '.' + domain[noOfSections-1]
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allowFilename = baseDir + '/accounts/allowedinstances.txt'
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if not os.path.isfile(allowFilename):
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# instance block list
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globalBlockingFilename = baseDir + '/accounts/blocking.txt'
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if os.path.isfile(globalBlockingFilename):
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with open(globalBlockingFilename, 'r') as fpBlocked:
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blockedStr = fpBlocked.read()
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if '*@' + domain in blockedStr:
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return True
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if shortDomain:
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if '*@' + shortDomain in blockedStr:
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return True
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else:
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# instance allow list
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if not shortDomain:
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if domain not in open(allowFilename).read():
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return True
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else:
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if shortDomain not in open(allowFilename).read():
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return True
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return False
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def isBlocked(baseDir: str, nickname: str, domain: str,
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blockNickname: str, blockDomain: str) -> bool:
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"""Is the given nickname blocked?
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"""
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if isEvil(blockDomain):
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return True
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globalBlockingFilename = baseDir + '/accounts/blocking.txt'
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if os.path.isfile(globalBlockingFilename):
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if '*@' + blockDomain in open(globalBlockingFilename).read():
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return True
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if blockNickname:
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blockHandle = blockNickname + '@' + blockDomain
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if blockHandle in open(globalBlockingFilename).read():
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return True
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allowFilename = baseDir + '/accounts/' + \
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nickname + '@' + domain + '/allowedinstances.txt'
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if os.path.isfile(allowFilename):
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if blockDomain not in open(allowFilename).read():
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return True
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blockingFilename = baseDir + '/accounts/' + \
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nickname + '@' + domain + '/blocking.txt'
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if os.path.isfile(blockingFilename):
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if '*@' + blockDomain in open(blockingFilename).read():
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return True
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if blockNickname:
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blockHandle = blockNickname + '@' + blockDomain
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if blockHandle in open(blockingFilename).read():
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return True
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return False
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def outboxBlock(baseDir: str, httpPrefix: str,
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nickname: str, domain: str, port: int,
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messageJson: {}, debug: bool) -> None:
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""" When a block request is received by the outbox from c2s
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"""
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if not messageJson.get('type'):
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if debug:
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print('DEBUG: block - no type')
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return
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if not messageJson['type'] == 'Block':
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if debug:
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print('DEBUG: not a block')
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return
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if not messageJson.get('object'):
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if debug:
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print('DEBUG: no object in block')
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return
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if not isinstance(messageJson['object'], str):
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if debug:
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print('DEBUG: block object is not string')
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return
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if debug:
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print('DEBUG: c2s block request arrived in outbox')
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messageId = removeIdEnding(messageJson['object'])
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if '/statuses/' not in messageId:
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if debug:
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print('DEBUG: c2s block object is not a status')
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return
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if not hasUsersPath(messageId):
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if debug:
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print('DEBUG: c2s block object has no nickname')
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return
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if ':' in domain:
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domain = domain.split(':')[0]
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postFilename = locatePost(baseDir, nickname, domain, messageId)
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if not postFilename:
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if debug:
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print('DEBUG: c2s block post not found in inbox or outbox')
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print(messageId)
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return
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nicknameBlocked = getNicknameFromActor(messageJson['object'])
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if not nicknameBlocked:
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print('WARN: unable to find nickname in ' + messageJson['object'])
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return
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domainBlocked, portBlocked = getDomainFromActor(messageJson['object'])
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domainBlockedFull = getFullDomain(domainBlocked, portBlocked)
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addBlock(baseDir, nickname, domain,
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nicknameBlocked, domainBlockedFull)
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if debug:
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print('DEBUG: post blocked via c2s - ' + postFilename)
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def outboxUndoBlock(baseDir: str, httpPrefix: str,
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nickname: str, domain: str, port: int,
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messageJson: {}, debug: bool) -> None:
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""" When an undo block request is received by the outbox from c2s
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"""
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if not messageJson.get('type'):
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if debug:
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print('DEBUG: undo block - no type')
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return
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if not messageJson['type'] == 'Undo':
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if debug:
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print('DEBUG: not an undo block')
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return
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if not messageJson.get('object'):
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if debug:
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print('DEBUG: no object in undo block')
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return
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if not isinstance(messageJson['object'], dict):
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if debug:
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print('DEBUG: undo block object is not string')
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return
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if not messageJson['object'].get('type'):
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if debug:
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print('DEBUG: undo block - no type')
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return
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if not messageJson['object']['type'] == 'Block':
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if debug:
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print('DEBUG: not an undo block')
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return
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if not messageJson['object'].get('object'):
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if debug:
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print('DEBUG: no object in undo block')
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return
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if not isinstance(messageJson['object']['object'], str):
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if debug:
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print('DEBUG: undo block object is not string')
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return
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if debug:
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print('DEBUG: c2s undo block request arrived in outbox')
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messageId = removeIdEnding(messageJson['object']['object'])
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if '/statuses/' not in messageId:
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if debug:
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print('DEBUG: c2s undo block object is not a status')
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return
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if not hasUsersPath(messageId):
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if debug:
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print('DEBUG: c2s undo block object has no nickname')
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return
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if ':' in domain:
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domain = domain.split(':')[0]
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postFilename = locatePost(baseDir, nickname, domain, messageId)
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if not postFilename:
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if debug:
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print('DEBUG: c2s undo block post not found in inbox or outbox')
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print(messageId)
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return
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nicknameBlocked = getNicknameFromActor(messageJson['object']['object'])
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if not nicknameBlocked:
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print('WARN: unable to find nickname in ' +
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messageJson['object']['object'])
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return
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domainObject = messageJson['object']['object']
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domainBlocked, portBlocked = getDomainFromActor(domainObject)
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domainBlockedFull = getFullDomain(domainBlocked, portBlocked)
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removeBlock(baseDir, nickname, domain,
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nicknameBlocked, domainBlockedFull)
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if debug:
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print('DEBUG: post undo blocked via c2s - ' + postFilename)
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def mutePost(baseDir: str, nickname: str, domain: str, port: int,
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httpPrefix: str, postId: str, recentPostsCache: {},
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debug: bool) -> None:
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""" Mutes the given post
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"""
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postFilename = locatePost(baseDir, nickname, domain, postId)
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if not postFilename:
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return
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postJsonObject = loadJson(postFilename)
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if not postJsonObject:
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return
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if postJsonObject.get('object'):
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if isinstance(postJsonObject['object'], dict):
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domainFull = getFullDomain(domain, port)
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actor = httpPrefix + '://' + domainFull + '/users/' + nickname
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# does this post have ignores on it from differenent actors?
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if not postJsonObject['object'].get('ignores'):
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if debug:
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print('DEBUG: Adding initial mute to ' + postId)
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ignoresJson = {
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"@context": "https://www.w3.org/ns/activitystreams",
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'id': postId,
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'type': 'Collection',
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"totalItems": 1,
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'items': [{
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'type': 'Ignore',
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'actor': actor
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}]
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}
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postJsonObject['object']['ignores'] = ignoresJson
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else:
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if not postJsonObject['object']['ignores'].get('items'):
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postJsonObject['object']['ignores']['items'] = []
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itemsList = postJsonObject['object']['ignores']['items']
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for ignoresItem in itemsList:
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if ignoresItem.get('actor'):
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if ignoresItem['actor'] == actor:
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return
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newIgnore = {
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'type': 'Ignore',
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'actor': actor
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}
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igIt = len(itemsList)
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itemsList.append(newIgnore)
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postJsonObject['object']['ignores']['totalItems'] = igIt
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saveJson(postJsonObject, postFilename)
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# remove cached post so that the muted version gets recreated
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# without its content text and/or image
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cachedPostFilename = \
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getCachedPostFilename(baseDir, nickname, domain, postJsonObject)
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if cachedPostFilename:
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if os.path.isfile(cachedPostFilename):
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os.remove(cachedPostFilename)
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muteFile = open(postFilename + '.muted', 'w+')
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if muteFile:
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muteFile.write('\n')
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muteFile.close()
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print('MUTE: ' + postFilename + '.muted file added')
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# if the post is in the recent posts cache then mark it as muted
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if recentPostsCache.get('index'):
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postId = \
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removeIdEnding(postJsonObject['id']).replace('/', '#')
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if postId in recentPostsCache['index']:
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print('MUTE: ' + postId + ' is in recent posts cache')
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if recentPostsCache['json'].get(postId):
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postJsonObject['muted'] = True
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recentPostsCache['json'][postId] = json.dumps(postJsonObject)
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if recentPostsCache.get('html'):
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if recentPostsCache['html'].get(postId):
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del recentPostsCache['html'][postId]
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print('MUTE: ' + postId +
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' marked as muted in recent posts memory cache')
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def unmutePost(baseDir: str, nickname: str, domain: str, port: int,
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httpPrefix: str, postId: str, recentPostsCache: {},
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debug: bool) -> None:
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""" Unmutes the given post
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"""
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postFilename = locatePost(baseDir, nickname, domain, postId)
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if not postFilename:
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return
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postJsonObject = loadJson(postFilename)
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if not postJsonObject:
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return
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muteFilename = postFilename + '.muted'
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if os.path.isfile(muteFilename):
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os.remove(muteFilename)
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print('UNMUTE: ' + muteFilename + ' file removed')
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if postJsonObject.get('object'):
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if isinstance(postJsonObject['object'], dict):
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if postJsonObject['object'].get('ignores'):
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domainFull = getFullDomain(domain, port)
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actor = httpPrefix + '://' + domainFull + '/users/' + nickname
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totalItems = 0
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if postJsonObject['object']['ignores'].get('totalItems'):
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totalItems = \
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postJsonObject['object']['ignores']['totalItems']
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itemsList = postJsonObject['object']['ignores']['items']
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for ignoresItem in itemsList:
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if ignoresItem.get('actor'):
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if ignoresItem['actor'] == actor:
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if debug:
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print('DEBUG: mute was removed for ' + actor)
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itemsList.remove(ignoresItem)
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break
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if totalItems == 1:
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if debug:
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print('DEBUG: mute was removed from post')
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del postJsonObject['object']['ignores']
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else:
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igItLen = len(postJsonObject['object']['ignores']['items'])
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postJsonObject['object']['ignores']['totalItems'] = igItLen
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saveJson(postJsonObject, postFilename)
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# remove cached post so that the muted version gets recreated
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# with its content text and/or image
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cachedPostFilename = \
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getCachedPostFilename(baseDir, nickname, domain, postJsonObject)
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if cachedPostFilename:
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if os.path.isfile(cachedPostFilename):
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os.remove(cachedPostFilename)
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# if the post is in the recent posts cache then mark it as unmuted
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if recentPostsCache.get('index'):
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postId = \
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removeIdEnding(postJsonObject['id']).replace('/', '#')
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if postId in recentPostsCache['index']:
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print('UNMUTE: ' + postId + ' is in recent posts cache')
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if recentPostsCache['json'].get(postId):
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postJsonObject['muted'] = False
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recentPostsCache['json'][postId] = json.dumps(postJsonObject)
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if recentPostsCache.get('html'):
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if recentPostsCache['html'].get(postId):
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del recentPostsCache['html'][postId]
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print('UNMUTE: ' + postId +
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' marked as unmuted in recent posts cache')
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def outboxMute(baseDir: str, httpPrefix: str,
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nickname: str, domain: str, port: int,
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messageJson: {}, debug: bool,
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recentPostsCache: {}) -> None:
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"""When a mute is received by the outbox from c2s
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"""
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if not messageJson.get('type'):
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return
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if not messageJson.get('actor'):
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return
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domainFull = getFullDomain(domain, port)
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if not messageJson['actor'].endswith(domainFull + '/users/' + nickname):
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return
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if not messageJson['type'] == 'Ignore':
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return
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if not messageJson.get('object'):
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if debug:
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print('DEBUG: no object in mute')
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return
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if not isinstance(messageJson['object'], str):
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if debug:
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print('DEBUG: mute object is not string')
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return
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if debug:
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print('DEBUG: c2s mute request arrived in outbox')
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messageId = removeIdEnding(messageJson['object'])
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if '/statuses/' not in messageId:
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if debug:
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print('DEBUG: c2s mute object is not a status')
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return
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if not hasUsersPath(messageId):
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if debug:
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print('DEBUG: c2s mute object has no nickname')
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return
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if ':' in domain:
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domain = domain.split(':')[0]
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postFilename = locatePost(baseDir, nickname, domain, messageId)
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if not postFilename:
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if debug:
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print('DEBUG: c2s mute post not found in inbox or outbox')
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print(messageId)
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return
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nicknameMuted = getNicknameFromActor(messageJson['object'])
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if not nicknameMuted:
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print('WARN: unable to find nickname in ' + messageJson['object'])
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return
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mutePost(baseDir, nickname, domain, port,
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|
httpPrefix, messageJson['object'], recentPostsCache,
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|
debug)
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|
|
|
if debug:
|
|
print('DEBUG: post muted via c2s - ' + postFilename)
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|
|
|
|
|
def outboxUndoMute(baseDir: str, httpPrefix: str,
|
|
nickname: str, domain: str, port: int,
|
|
messageJson: {}, debug: bool,
|
|
recentPostsCache: {}) -> None:
|
|
"""When an undo mute is received by the outbox from c2s
|
|
"""
|
|
if not messageJson.get('type'):
|
|
return
|
|
if not messageJson.get('actor'):
|
|
return
|
|
domainFull = getFullDomain(domain, port)
|
|
if not messageJson['actor'].endswith(domainFull + '/users/' + nickname):
|
|
return
|
|
if not messageJson['type'] == 'Undo':
|
|
return
|
|
if not messageJson.get('object'):
|
|
return
|
|
if not isinstance(messageJson['object'], dict):
|
|
return
|
|
if not messageJson['object'].get('type'):
|
|
return
|
|
if messageJson['object']['type'] != 'Ignore':
|
|
return
|
|
if not isinstance(messageJson['object']['object'], str):
|
|
if debug:
|
|
print('DEBUG: undo mute object is not a string')
|
|
return
|
|
if debug:
|
|
print('DEBUG: c2s undo mute request arrived in outbox')
|
|
|
|
messageId = removeIdEnding(messageJson['object']['object'])
|
|
if '/statuses/' not in messageId:
|
|
if debug:
|
|
print('DEBUG: c2s undo mute object is not a status')
|
|
return
|
|
if not hasUsersPath(messageId):
|
|
if debug:
|
|
print('DEBUG: c2s undo mute object has no nickname')
|
|
return
|
|
if ':' in domain:
|
|
domain = domain.split(':')[0]
|
|
postFilename = locatePost(baseDir, nickname, domain, messageId)
|
|
if not postFilename:
|
|
if debug:
|
|
print('DEBUG: c2s undo mute post not found in inbox or outbox')
|
|
print(messageId)
|
|
return
|
|
nicknameMuted = getNicknameFromActor(messageJson['object']['object'])
|
|
if not nicknameMuted:
|
|
print('WARN: unable to find nickname in ' +
|
|
messageJson['object']['object'])
|
|
return
|
|
|
|
unmutePost(baseDir, nickname, domain, port,
|
|
httpPrefix, messageJson['object']['object'],
|
|
recentPostsCache, debug)
|
|
|
|
if debug:
|
|
print('DEBUG: post undo mute via c2s - ' + postFilename)
|
|
|
|
|
|
def brochModeIsActive(baseDir: str) -> bool:
|
|
"""Returns true if broch mode is active
|
|
"""
|
|
allowFilename = baseDir + '/accounts/allowedinstances.txt'
|
|
return os.path.isfile(allowFilename)
|
|
|
|
|
|
def setBrochMode(baseDir: str, domainFull: str, enabled: bool) -> None:
|
|
"""Broch mode can be used to lock down the instance during
|
|
a period of time when it is temporarily under attack.
|
|
For example, where an adversary is constantly spinning up new
|
|
instances.
|
|
It surveys the following lists of all accounts and uses that
|
|
to construct an instance level allow list. Anything arriving
|
|
which is then not from one of the allowed domains will be dropped
|
|
"""
|
|
allowFilename = baseDir + '/accounts/allowedinstances.txt'
|
|
|
|
if not enabled:
|
|
# remove instance allow list
|
|
if os.path.isfile(allowFilename):
|
|
os.remove(allowFilename)
|
|
print('Broch mode turned off')
|
|
else:
|
|
if os.path.isfile(allowFilename):
|
|
lastModified = fileLastModified(allowFilename)
|
|
print('Broch mode already activated ' + lastModified)
|
|
return
|
|
# generate instance allow list
|
|
allowedDomains = [domainFull]
|
|
followFiles = ('following.txt', 'followers.txt')
|
|
for subdir, dirs, files in os.walk(baseDir + '/accounts'):
|
|
for acct in dirs:
|
|
if '@' not in acct:
|
|
continue
|
|
if 'inbox@' in acct or 'news@' in acct:
|
|
continue
|
|
accountDir = os.path.join(baseDir + '/accounts', acct)
|
|
for followFileType in followFiles:
|
|
followingFilename = accountDir + '/' + followFileType
|
|
if not os.path.isfile(followingFilename):
|
|
continue
|
|
with open(followingFilename, "r") as f:
|
|
followList = f.readlines()
|
|
for handle in followList:
|
|
if '@' not in handle:
|
|
continue
|
|
handle = handle.replace('\n', '')
|
|
handleDomain = handle.split('@')[1]
|
|
if handleDomain not in allowedDomains:
|
|
allowedDomains.append(handleDomain)
|
|
break
|
|
|
|
# write the allow file
|
|
allowFile = open(allowFilename, "w+")
|
|
if allowFile:
|
|
allowFile.write(domainFull + '\n')
|
|
for d in allowedDomains:
|
|
allowFile.write(d + '\n')
|
|
allowFile.close()
|
|
print('Broch mode enabled')
|
|
|
|
setConfigParam(baseDir, "brochMode", enabled)
|
|
|
|
|
|
def brochModeLapses(baseDir: str, lapseDays=7) -> bool:
|
|
"""After broch mode is enabled it automatically
|
|
elapses after a period of time
|
|
"""
|
|
allowFilename = baseDir + '/accounts/allowedinstances.txt'
|
|
if not os.path.isfile(allowFilename):
|
|
return False
|
|
lastModified = fileLastModified(allowFilename)
|
|
modifiedDate = None
|
|
try:
|
|
modifiedDate = \
|
|
datetime.strptime(lastModified, "%Y-%m-%dT%H:%M:%SZ")
|
|
except BaseException:
|
|
return False
|
|
if not modifiedDate:
|
|
return False
|
|
currTime = datetime.datetime.utcnow()
|
|
daysSinceBroch = (currTime - modifiedDate).days
|
|
if daysSinceBroch >= lapseDays:
|
|
try:
|
|
os.remove(allowFilename)
|
|
setConfigParam(baseDir, "brochMode", False)
|
|
print('Broch mode has elapsed')
|
|
return True
|
|
except BaseException:
|
|
pass
|
|
return False
|