LBRYFoundation/LBRY-Vault
1
0
Fork 0
mirror of https://github.com/LBRYFoundation/LBRY-Vault.git synced 2025-08-31 09:21:39 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

blockchain.py: check header length

Browse source 
related: #4212
This commit is contained in:
SomberNight 2018-04-05 16:12:34 +02:00
parent 9a0cf63769
commit 0180abc179
No known key found for this signature in database
GPG key ID: B33B5F232C6271E9
1 changed files with 6 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
lib/blockchain.py
View file

@ -40,6 +40,10 @@ def serialize_header(res):
return s
def deserialize_header(s, height):
if not s:
raise Exception('Invalid header: {}'.format(s))
if len(s) != 80:
raise Exception('Invalid header length: {}'.format(len(s)))
hex_to_int = lambda s: int('0x' + bh2u(s[::-1]), 16)
h = {}
h['version'] = hex_to_int(s[0:4])
@ -255,6 +259,8 @@ class Blockchain(util.PrintError):
with open(name, 'rb') as f:
f.seek(delta * 80)
h = f.read(80)
if len(h) < 80:
raise Exception('Expected to read a full header. This was only {} bytes'.format(len(h)))
elif not os.path.exists(util.get_headers_dir(self.config)):
raise Exception('Electrum datadir does not exist. Was it deleted while running?')
else: