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add integrity check for the headers file

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Victor Shyba 2018-05-07 15:10:19 -03:00
parent fd04c607b2
commit 2299098884
2 changed files with 24 additions and 1 deletions
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1
lbrynet/conf.py
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@ -236,6 +236,7 @@ FIXED_SETTINGS = {
'SLACK_WEBHOOK': ('nUE0pUZ6Yl9bo29epl5moTSwnl5wo20ip2IlqzywMKZiIQSFZR5' 'SLACK_WEBHOOK': ('nUE0pUZ6Yl9bo29epl5moTSwnl5wo20ip2IlqzywMKZiIQSFZR5'
'AHx4mY0VmF0WQZ1ESEP9kMHZlp1WzJwWOoKN3ImR1M2yUAaMyqGZ='), 'AHx4mY0VmF0WQZ1ESEP9kMHZlp1WzJwWOoKN3ImR1M2yUAaMyqGZ='),
'WALLET_TYPES': [LBRYUM_WALLET, LBRYCRD_WALLET], 'WALLET_TYPES': [LBRYUM_WALLET, LBRYCRD_WALLET],
'HEADERS_FILE_SHA256_CHECKSUM': (366295, 'b0c8197153a33ccbc52fb81a279588b6015b68b7726f73f6a2b81f7e25bfe4b9')
} }
ADJUSTABLE_SETTINGS = { ADJUSTABLE_SETTINGS = {

24
lbrynet/core/Wallet.py
View file

@ -10,6 +10,7 @@ from twisted.internet import threads, reactor, defer, task
from twisted.python.failure import Failure from twisted.python.failure import Failure
from twisted.internet.error import ConnectionAborted from twisted.internet.error import ConnectionAborted
from hashlib import sha256
from lbryum import wallet as lbryum_wallet from lbryum import wallet as lbryum_wallet
from lbryum.network import Network from lbryum.network import Network
from lbryum.simple_config import SimpleConfig from lbryum.simple_config import SimpleConfig
@ -127,7 +128,6 @@ class Wallet(object):
return os.stat(headers_path).st_size return os.stat(headers_path).st_size
return 0 return 0
@defer.inlineCallbacks @defer.inlineCallbacks
def get_remote_height(self, server, port): def get_remote_height(self, server, port):
connected = defer.Deferred() connected = defer.Deferred()
@ -143,6 +143,7 @@ class Wallet(object):
from lbrynet import conf from lbrynet import conf
if conf.settings['blockchain_name'] != "lbrycrd_main": if conf.settings['blockchain_name'] != "lbrycrd_main":
defer.returnValue(False) defer.returnValue(False)
self._check_header_file_integrity(conf)
s3_headers_depth = conf.settings['s3_headers_depth'] s3_headers_depth = conf.settings['s3_headers_depth']
if not s3_headers_depth: if not s3_headers_depth:
defer.returnValue(False) defer.returnValue(False)
@ -158,6 +159,27 @@ class Wallet(object):
log.warning("error requesting remote height from %s:%i - %s", server_url, port, err) log.warning("error requesting remote height from %s:%i - %s", server_url, port, err)
defer.returnValue(False) defer.returnValue(False)
def _check_header_file_integrity(self, conf):
# TODO: temporary workaround for usability. move to txlbryum and check headers instead of file integrity
hashsum = sha256()
checksum_height, checksum = conf.settings['HEADERS_FILE_SHA256_CHECKSUM']
checksum_length_in_bytes = checksum_height * HEADER_SIZE
if self.local_header_file_size() < checksum_length_in_bytes:
return
headers_path = os.path.join(self.config.path, "blockchain_headers")
with open(headers_path, "rb") as headers_file:
hashsum.update(headers_file.read(checksum_length_in_bytes))
current_checksum = hashsum.hexdigest()
if current_checksum != checksum:
msg = "Expected checksum {}, got {}".format(checksum, current_checksum)
log.warning("Wallet file corrupted, checksum mismatch. " + msg)
log.warning("Deleting header file so it can be downloaded again.")
os.unlink(headers_path)
elif (self.local_header_file_size() % HEADER_SIZE) != 0:
log.warning("Header file is good up to checkpoint height, but incomplete. Truncating to checkpoint.")
with open(headers_path, "rb+") as headers_file:
headers_file.truncate(checksum_length_in_bytes)
@defer.inlineCallbacks @defer.inlineCallbacks
def start(self): def start(self):
should_download_headers = yield self.should_download_headers_from_s3() should_download_headers = yield self.should_download_headers_from_s3()