658 lines
22 KiB
Python
658 lines
22 KiB
Python
# TODO: Implement File COW (except for append) (+ version / token updates caused by this)
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# TODO: ? Stop using tokens for dirs, use hashed name + parent token
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# TODO: ? Stop using tokens for files, use hashed name + short ?version-number + parent token instead
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# TODO: Store version-numbers for files in parent-dir
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# TODO: Chane Milestone-Format from [stone,stone,...] to [[dirStne,dirStone,...],[fileStone,,...]] and dont save type for the stones
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# TODO: Decide how / when / from which class to push new blocks
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# TODO: Unload 'overwritten' blobs
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# TODO: Close blobs when they become unknown to the kernel or when we unmount (genesis only on unmount)
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# TODO: inode_id -> actuall Inode lookup table
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# TODO: Add chareable folders:
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# TODO: No more 'tokens' -> write-key for address-gen and read-key for encryption
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# TODO: Change iota receive adress to next adress (encrypted with read-key)
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# TODO: Add share-functionality:
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# 1. publish read-key of the directory
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# 2. publish public adress of current milestone-block
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# Problem: No updateable milestone-index... -> Create share-genesis?
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from iota import Iota, ProposedTransaction, Address, TryteString, Tag
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from iota.crypto.addresses import AddressGenerator
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from iota.crypto.types import Seed
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from iota.codecs import TrytesDecodeError
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from Crypto.Cipher import AES
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from Crypto.Util.Padding import pad, unpad
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import math
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from pprint import pprint
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import hashlib
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import sys
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import random
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import time
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import msgpack
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import copy
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import gzip
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import secrets
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import stat
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import errno
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import pyfuse3
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import trio
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from collections import defaultdict
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from pyfuse3 import FUSEError
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try:
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import faulthandler
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except ImportError:
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pass
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else:
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faulthandler.enable()
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CHUNKSIZE = 2187
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SYNCWRITES = True
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def log(txt):
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print("[-] "+str(txt))
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def sendEmOff(bundles, api):
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for bundle in bundles:
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print("[->]")
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api.send_trytes(
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trytes=bundle
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)
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class Atom():
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def __init__(self, milestone: bool, cont, name: str = None) -> None:
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self.milestone = milestone
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self.delta = not milestone
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self.name = name
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self.cont = cont
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def dump(self):
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if self.milestone:
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return msgpack.dumps([True, self.cont])
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else:
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return msgpack.dumps([False, self.name, self.cont])
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class BlobChunk():
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def __init__(self, data: bytes = b'', sealed: bool = False) -> None:
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self.data = data
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self.sealed = sealed
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def getData(self) -> bytes:
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return self.data
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def append(self, data: bytes) -> None:
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if len(data)+len(self.data) > CHUNKSIZE:
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raise Exception("That to big!")
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self.data += data
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if len(self.data) == CHUNKSIZE:
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self.seal()
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def getBytesLeft(self) -> int:
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if self.sealed:
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return 0
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return CHUNKSIZE - len(self.data)
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def seal(self) -> None:
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self.sealed = True
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def isSealed(self) -> bool:
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return self.sealed
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class TangleBlob():
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def __init__(self, writeKey: bytes, readKey: bytes, iotaApi: Iota) -> None:
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self.writeKey = writeKey
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self.readKey = readKey
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self.iotaApi = iotaApi
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self.preChunks = 0
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self.chunks = []
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m = hashlib.sha3_512()
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m.update(self.writeKey)
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trSeed = TryteString.from_bytes(m.digest())[:81]
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self.adressGen = AddressGenerator(Seed(trSeed))
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self.fetched = False
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self.pushedNum = 0
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def _requireFetched(self):
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if not self.fetched:
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self.fetch()
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def _getReadKey(self, chunkNum: int) -> bytes:
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m = hashlib.sha3_384()
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m.update(self.readKey)
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m.update(chunkNum.to_bytes(8, "little")) # 64 bits should be enought...
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m.update(self.readKey)
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return m.digest()
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def _genBundle(self, data, addr) -> str:
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txMsg = TryteString.from_bytes(data)
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trans = ProposedTransaction(
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address = addr,
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value = 0,
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tag = Tag("IOTAFS"),
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message = txMsg
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)
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return self.iotaApi.prepare_transfer(
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transfers = [trans],
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inputs = [addr]
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)['trytes']
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def _dumpChunk(self, chunkNum: int) -> str:
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readKey = self._getReadKey(chunkNum + self.preChunks)
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data = self.chunks[chunkNum].getData()
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cipher = AES.new(readKey[16:][:16], AES.MODE_CBC, readKey[:16])
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ct_bytes = cipher.encrypt(pad(data, AES.block_size))
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addr = self.adressGen.get_addresses(start=chunkNum + self.preChunks, count=1)[0]
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return self._genBundle(ct_bytes, addr)
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def dumpAllSealed(self):
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bundles = []
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for i in range(max(0,len(self.chunks)-self.pushedNum)):
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c = i + self.pushedNum
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chunk = self.chunks[c]
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if chunk.isSealed():
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bundles.append(self._dumpChunk(c))
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self.pushedNum+=1
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return bundles
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def sealAndDump(self):
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# When unmounting / closing / ...
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if self.chunks:
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self.chunks[-1].seal()
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return self.dumpAllSealed()
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def append(self, data: bytes, newBlock: bool = False) -> None:
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self._requireFetched()
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if newBlock:
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self.chunks[-1].seal()
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elif len(self.chunks):
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bytesLeft = self.chunks[-1].getBytesLeft()
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if bytesLeft:
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leftChunk = data[:bytesLeft]
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data = data[bytesLeft:]
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self.chunks[-1].append(leftChunk)
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while len(data):
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chunk = data[:CHUNKSIZE]
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self.chunks.append(BlobChunk(chunk))
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data = data[CHUNKSIZE:]
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if SYNCWRITES:
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bundles = self.dumpAllSealed()
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if bundles:
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sendEmOff(bundles, self.iotaApi)
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def getChunkLen(self) -> int:
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return self.preChunks + len(self.chunks)
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def getSize(self) -> int:
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if len(self.chunks):
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return self.getChunkLen()*CHUNKSIZE - self.chunks[-1].getBytesLeft()
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return self.preChunks
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def read(self) -> bytes:
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self._requireFetched()
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data = b''
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for chunk in self.chunks:
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data += chunk.getData()
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return data
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def _dump(self) -> str:
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self.chunks[-1].seal()
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data = ""
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for c in range(len(self.chunks)-self.pushedNum):
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num = c + self.pushedNum
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data += self._dumpChunk(num) # num is without preChunks
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self.pushedNum = self.getChunkLen()
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return data
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def fetch(self) -> None:
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skipChunks = self.preChunks
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chunkNum = self.getChunkLen() + skipChunks
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while True:
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readKey = self._getReadKey(chunkNum)
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cipher = AES.new(readKey[16:][:16], AES.MODE_CBC, readKey[:16])
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addr = self.adressGen.get_addresses(start=chunkNum, count=1)[0]
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txHash = self.iotaApi.find_transactions(tags=[Tag("IOTAFS")], addresses=[addr])["hashes"]
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if len(txHash)==0:
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break
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bundles = self.iotaApi.get_bundles(txHash[0])["bundles"]
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for bundle in bundles:
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for tx in bundle.transactions:
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# TODO: Can we just strip the 9s and call it a day?
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tryteStr = TryteString(str(tx.signature_message_fragment).rstrip("9"))
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try:
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ct_bytes = tryteStr.as_bytes()
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except TrytesDecodeError:
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ct_bytes = (tryteStr+"9").as_bytes()
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self.chunks.append(BlobChunk(unpad(cipher.decrypt(ct_bytes), AES.block_size), True))
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chunkNum += 1
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self.pushedNum = len(self.chunks)
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self.fetched = True
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self._afterFetch()
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def _afterFetch(self) -> None:
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return
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def sealLastChunk(self) -> None:
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self.chunks[-1].seal()
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def chunkLayout(self, width=50):
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fac = width / CHUNKSIZE
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lines = []
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for c,chunk in enumerate(self.chunks):
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bytesWritten = len(chunk.data)
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bytesEmpty = CHUNKSIZE - bytesWritten
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if chunk.isSealed():
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lines.append("["+"#"*int(bytesWritten*fac)+"="*int(bytesEmpty*fac)+"] (SEALED)")
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else:
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lines.append("["+"#"*int(bytesWritten*fac)+" "*int(bytesEmpty*fac)+"] ("+str(bytesWritten)+"/"+str(CHUNKSIZE)+")")
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if self.pushedNum < c+1:
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lines[-1]+=" {+}"
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return "\n".join(lines)
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def _close(self):
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bundles = self.sealAndDump()
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if bundles:
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sendEmOff(bundles, self.iotaApi)
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class TangleFileTreeElement(TangleBlob):
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def __init__(self, name: str, lastMilestoneIndex: int, parent, iotaApi: Iota) -> None:
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if isinstance(parent, bytes):
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self.writeKey = hashlib.sha3_384(parent + name.encode() + b'write' + parent).digest()
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self.readKey = hashlib.sha3_384(parent + name.encode() + b'read' + parent).digest()
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else:
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self.writeKey = hashlib.sha3_384(parent.writeKey + name.encode()).digest()
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self.readKey = hashlib.sha3_384(parent.readKey + name.encode()).digest()
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super(TangleFileTreeElement, self).__init__(self.writeKey, self.readKey, iotaApi)
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self.name = name
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self.inodes = {}
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self.parent = parent
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self.milestoneIndex = lastMilestoneIndex
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self.preChunks = self.milestoneIndex
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def _afterFetch(self) -> None:
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raw = self.read()
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if raw==b'':
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return
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unpacker = msgpack.Unpacker(raw=True)
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unpacker.feed(raw)
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for i, elem in enumerate(reversed(list(unpacker))):
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if elem[0]:
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# Is a milestone
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# TODO: Update our known milestoneIndex, if we find one
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# might have to rewrite .fetch() and merge it here...
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self.milestoneIndex = self.getChunkLen()
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self._applyMilestone(elem[1])
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break
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else:
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name = elem[1].decode()
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if name in self.inodes: #name
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atom = Atom(False, elem[2], name)
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self.inodes[name].applyAtom(atom)
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else:
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# new inode
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type = ["dir","file"][elem[2][b't']]
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self.inodes[name] = Inode(name, self.iotaApi, self, type)
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atom = Atom(False, elem[2], name)
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self.inodes[name].applyAtom(atom)
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def _getSkipChunks(self):
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return
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def _applyMilestone(self, milestone) -> None:
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self.inodes = {}
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for stone in milestone:
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atom = Atom()
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atom.load(stone)
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self.inodes[atom.name] = atom
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def _applyAtom(self, atom: Atom) -> None:
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if atom.name in self.inodes:
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self.inodes[atom.name].applyAtom(atom)
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else:
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cont = atom.cont
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type = ["dir","file"][cont[b't']]
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inode = Inode(atom.name, self.iotaApi, self, type)
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self.inodes[atom.name] = inode
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def _newAtom(self, atom: Atom) -> None:
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self.append(atom.dump())
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def getNameList(self):
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self._requireFetched()
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return list(self.inodes.keys())
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def _tree(self):
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self._requireFetched()
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dirs = {}
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files = []
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for inode in self.inodes:
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if self.inodes[inode].type=="file":
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files.append(inode)
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elif self.inodes[inode].type=="dir":
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dirs[inode] = self.inodes[inode].getRef()._tree()
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else:
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files.append("["+str(self.inodes[inode].type)+"]/"+inode)
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lines = ["{"+self.name+"}"]
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for i,d in enumerate(dirs):
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dir = dirs[d]
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if len(files)==0 and i==len(dirs)-1:
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lines.append(" └──"+dir[0]+"")
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for l in range(len(dir)-1):
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lines.append(" "+dir[l+1])
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else:
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lines.append(" ├──"+dir[0]+"")
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for l in range(len(dir)-1):
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lines.append(" │ "+dir[l+1])
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if len(files):
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for f in range(len(files)-1):
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lines.append(" ├──"+files[f])
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lines.append(" └──"+files[-1])
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return lines
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def tree(self):
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return "\n".join(self._tree())
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def getInode(self, name: str) -> Atom:
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self._requireFetched()
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return self.inodes[name]
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def mkdir(self, name: str) -> bool:
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self._requireFetched()
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if name in self.getNameList():
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return False
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inode = Inode(name, self.iotaApi, self, "dir")
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atom = inode.change(milestoneIndex=0)
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self._newAtom(atom)
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self.inodes[name] = inode
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return True
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def mkfile(self, name: str) -> bool:
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self._requireFetched()
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if name in self.getNameList():
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return False
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inode = Inode(name, self.iotaApi, self, "file")
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atom = inode.change(size=0, milestoneIndex=0, hash=b'NULL')
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self._newAtom(atom)
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self.inodes[name] = inode
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return True
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def _updateFileSize(self, name: str, size: int) -> None:
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self._requireFetched()
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atom = self.inodes[name].change(size=size)
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self._newAtom(atom)
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def _updateFileHash(self, name: str, hash: bytes, size: int) -> None:
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log("New Hash for file '"+name+"' registered")
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self._requireFetched()
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atom = self.inodes[name].change(size=size, hash=hash)
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self._newAtom(atom)
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def performMilestone(self) -> None:
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if isinstance(self.parent, bytes):
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raise Exception("You cant create a milestone of the genesis block, you idiot!")
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stones = {}
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for a in self.inodes:
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stones[a] = self.inodes[a].toStone()
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self.atomStack = 0
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milestoneAtom = Atom(True, stones)
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data = milestoneAtom.dump()
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self.milestoneIndex = self.getChunkLen()
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if self.parent!=None:
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self.parent._updateChildMilestone(self.name, self.milestoneIndex)
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self.append(data, True)
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def _updateChildMilestone(self, name: str, milestoneIndex: int):
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atom = self.inodes[name].change(milestoneIndex = milestoneIndex)
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if isinstance(self.parent, bytes):
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# We are the genesis-block
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self.milestoneIndex = milestoneIndex
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self.append(msgpack.dumps(milestoneIndex))
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else:
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self._newAtom(atom)
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def close(self) -> None:
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for i in self.inodes:
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inode = self.inodes[i]
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if inode.hasRef:
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ref = inode.getRef()
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ref.close()
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self._close()
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class TangleFile():
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def __init__(self, name: str, parent: TangleFileTreeElement, iotaApi: Iota) -> None:
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self.iotaApi = iotaApi
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self.name = name
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self.parent = parent
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self.reflexiveInode = parent.inodes[name]
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self.size = self.reflexiveInode.size
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self.hash = self.reflexiveInode.hash
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self.writeKey = hashlib.sha3_384(b'f' + parent.writeKey + self.hash).digest()
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self.readKey = hashlib.sha3_384(b'f' + parent.readKey + self.hash).digest()
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self.blob = TangleBlob(self.token, iotaApi)
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def write(self, offset: int, data: bytes):
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if offset == self.size:
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self.blob.append(data)
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self.size = self.blob.getSize()
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self.parent._updateFileSize(self.name, self.size)
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else:
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oldData = self.blob.read()
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newData = oldData[:offset] + data + oldData[offset+len(data):]
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self.hash = hashlib.sha256(newData).digest()
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self.writeKey = hashlib.sha3_384(b'f' + self.parent.writeKey + self.hash).digest()
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self.readKey = hashlib.sha3_384(b'f' + self.parent.readKey + self.hash).digest()
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self.blob = TangleBlob(self.writeKey, self.readKey, self.iotaApi)
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self.blob.append(newData)
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self.size = self.blob.getSize()
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self.parent._updateFileHash(self.name, self.hash, self.size)
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def close(self):
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self.blob._close()
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class Inode():
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def __init__(self, name: str, iotaApi: Iota, parent: TangleFileTreeElement = None, type: str = None) -> None:
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self.parent = parent
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self.name = name
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self.type = type
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self.ref = None
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self.iotaApi = iotaApi
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def setType(self, type: str) -> None:
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self.type = type
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def change(self, size: int=None, hash: int=None, milestoneIndex: int=None) -> Atom:
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delta = {}
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delta[b't'] = (self.type=="file")
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if size!=None:
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self.size = size
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delta[b's'] = size
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if hash!=None:
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self.hash = hash
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delta[b'h'] = hash
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if milestoneIndex!=None:
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self.milestoneIndex = milestoneIndex
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delta[b'm'] = milestoneIndex
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return Atom(False, delta, self.name)
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def applyAtom(self, atom: Atom) -> None:
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if atom.name != self.name:
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raise Exception("Cannot apply atom ment for a different inode (names differ)")
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if atom.milestone:
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stones = atom.cont
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if self.name in stones:
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self.applyAtom(Atom(False, stones[self.name], self.name))
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else:
|
||
if (self.type=="file") != atom.cont[b't']:
|
||
raise Exception("I am a "+self.type+"; this atom is for the other thing")
|
||
delta = atom.cont
|
||
if b's' in delta:
|
||
self.size = delta[b's']
|
||
if b'h' in delta:
|
||
self.hash = delta[b'h']
|
||
if b'm' in delta:
|
||
self.milestoneIndex = delta[b'm']
|
||
|
||
def toStone(self) -> None:
|
||
if self.type=="file":
|
||
return [self.size, self.hash]
|
||
else:
|
||
return [self.milestoneIndex]
|
||
|
||
def getRef(self):
|
||
if self.name == "*":
|
||
return None
|
||
if not self.ref:
|
||
if self.type=="dir":
|
||
self.ref = TangleFileTreeElement(self.name, self.milestoneIndex, self.parent, self.iotaApi)
|
||
elif self.type=="file":
|
||
self.ref = TangleFile(self.name, self.parent, self.iotaApi)
|
||
else:
|
||
raise Exception("Cannot get reference of an inode of type "+self.type)
|
||
return self.ref
|
||
|
||
def hasRef(self):
|
||
return not self.ref==None
|
||
|
||
class IotaFS(pyfuse3.Operations):
|
||
|
||
#supports_dot_lookup = True
|
||
enable_writeback_cache = True
|
||
|
||
def __init__(self, token) -> None:
|
||
self.api = Iota('https://nodes.thetangle.org:443', local_pow=True)
|
||
# TODO Cache last known milestone-Index of genesis locally
|
||
self.genesis = TangleFileTreeElement("*", 0, token, None, self.api)
|
||
log("Fetching Genesis...")
|
||
self.genesis.fetch()
|
||
log("Retrieving reference to root")
|
||
if self.genesis.getNameList()!=["/"]:
|
||
if len(self.genesis.getNameList()):
|
||
# theres another directory in our genesis chain... WTF?!
|
||
raise Exception("Corrupted Genesis-Chain:"
|
||
+ "Unknown records for no root-directory in Genesis Chain: "+str(self.genesis.getNameList()))
|
||
else:
|
||
# we dont have a root yet, lets create one...
|
||
log("Unable to find reference to root: Creating new root")
|
||
self.genesis.mkdir("/")
|
||
log("Successfully Mounted!")
|
||
self.inodeIds = {}
|
||
self.fhs = {}
|
||
|
||
async def access(self, inodeId, mode, ctx):
|
||
# not called
|
||
raise Exception("This function should not been called; WTF")
|
||
|
||
async def create(self, parent_inodeId, name, mode, flags, ctx):
|
||
#return (fi, attr)
|
||
# $increase lookupN
|
||
pass
|
||
|
||
async def flush(self, fh):
|
||
# flush the file at fh
|
||
# basically means: close, but may be called multiple times,
|
||
# when open multiple times with same fh
|
||
pass
|
||
|
||
async def forget(self, inode_list):
|
||
# inodelist = [(fh, nlookup),...]
|
||
# decrement lookupN of file at fh
|
||
# if lookupN == 0:
|
||
# 'remove' Inode
|
||
# should be called at unmount to bring lookupN to 0 for all files
|
||
pass
|
||
|
||
async def getattr(self, inodeId, ctx):
|
||
# return EntryAttributes()
|
||
pass
|
||
|
||
#async def link(self, inodeId, new_parent_inode, new_name, ctx):
|
||
|
||
async def lookup(self, parent_inodeId, name, ctx):
|
||
#return EntryAttributes()
|
||
# not exists: raise FUSEError(errno.ENOENT)
|
||
# must handle .. and .
|
||
# $increase lookupN
|
||
pass
|
||
|
||
async def mkdir(self, parent_inodeId, name, mode, ctx):
|
||
#return EntryAttributes()
|
||
# $increase lookupN
|
||
pass
|
||
|
||
async def mknod(self, parent_inodeId, name, mode, rdev, ctx):
|
||
# create file
|
||
#return EntryAttributes()
|
||
# $increase lookupN
|
||
pass
|
||
|
||
async def open(self, inodeId, flags, ctx):
|
||
# open file at inodeId; give back fh
|
||
#return FileInode(..fh)
|
||
pass
|
||
|
||
async def opendir(self, inodeId, ctx):
|
||
#return fh
|
||
pass
|
||
|
||
async def read(self, fh, off, size):
|
||
# Read size bytes from fh at position off
|
||
pass
|
||
|
||
async def readdir(self, fh, start_id, token):
|
||
# fuck this shit
|
||
# http://www.rath.org/pyfuse3-docs/operations.html#pyfuse3.Operations.readdir
|
||
pass
|
||
|
||
async def release(self, fh):
|
||
# file no longer open -> close? uncache?
|
||
pass
|
||
|
||
async def releasedir(self, fh):
|
||
# dir no longer open -> uncache?
|
||
pass
|
||
|
||
#api = Iota('https://nodes.thetangle.org:443', local_pow=True)
|
||
#token = b'testToken'
|
||
#genesis = TangleFileTreeElement("*", 0, token, api)
|
||
|
||
if False:
|
||
genesis.mkdir("/")
|
||
root = genesis.inodes["/"].getRef()
|
||
|
||
root.mkdir("dir1")
|
||
root.mkdir("dir2")
|
||
root.mkdir("dir3")
|
||
root.mkdir("dir4")
|
||
root.mkfile("file.txt")
|
||
d2 = root.inodes["dir2"].getRef()
|
||
d2.mkfile("a.txt")
|
||
d3 = root.inodes["dir3"].getRef()
|
||
d3.mkfile("b.txt")
|
||
d3.mkfile("c.txt")
|
||
d3.mkfile("d.txt")
|
||
d3.mkdir("subDir")
|
||
d4 = root.inodes["dir4"].getRef()
|
||
d4.mkdir("sub")
|
||
sub = d4.inodes["sub"].getRef()
|
||
sub.mkdir("subsub")
|
||
|
||
print(genesis.tree())
|
||
|
||
def main():
|
||
iotaFs = IotaFS(b'This is a test token')
|
||
opts = set(pyfuse3.default_options)
|
||
opts.add('fsname=IotaFS')
|
||
#opts.add('debug')
|
||
pyfuse3.init(iotaFs, "mount", opts)
|
||
|
||
try:
|
||
trio.run(pyfuse3.main)
|
||
except:
|
||
pyfuse3.close(unmount=True)
|
||
raise
|
||
|
||
pyfuse3.close()
|