53404e7b-dd83-450a-a824-573abaf794af
commented
5 years ago Hi, in the short program, that works well for password of 4 character, when I change password length I got this error (parameter MAXD)
Traceback (most recent call last):
File "p33.py", line 54, in <module>
zf.extractall( pwd=password.encode('cp850','replace'))
File "/usr/lib/python3.5/zipfile.py", line 1347, in extractall
self.extract(zipinfo, path, pwd)
File "/usr/lib/python3.5/zipfile.py", line 1335, in extract
return self._extract_member(member, path, pwd)
File "/usr/lib/python3.5/zipfile.py", line 1399, in _extract_member
shutil.copyfileobj(source, target)
File "/usr/lib/python3.5/shutil.py", line 73, in copyfileobj
buf = fsrc.read(length)
File "/usr/lib/python3.5/zipfile.py", line 844, in read
data = self._read1(n)
File "/usr/lib/python3.5/zipfile.py", line 934, in _read1
self._update_crc(data)
File "/usr/lib/python3.5/zipfile.py", line 862, in _update_crc
raise BadZipFile("Bad CRC-32 for file %r" % self.name)
zipfile.BadZipFile: Bad CRC-32 for file '11_02_2019.pdf'program: import string, zipfile, zlib
from zipfile import ZipFile
zf= ZipFile('11_02_2019.pdf.zip')
MAXD=6
upper_case=string.ascii_uppercase
uc=list(upper_case)
n=len(uc)
print (n)
pos=[]
for k in range(0,MAXD):
pos.append(0)
print (pos)
for let in range(0,n):
print (let, uc[let])
let=0
koniec=0;
k3=0
p=0
while koniec != MAXD :
k=0
password=''
for k2 in range(0,MAXD):
password=password+uc[pos[k2]]
print (password)
try:
with zipfile.ZipFile('11_02_2019.pdf.zip') as zf:
zf.extractall( pwd=password.encode('cp850','replace'))
print ("Password found:" + password)
exit(0)
except RuntimeError:
pass
except zlib.error:
pass
#print "ppppppppppppppppppppppppp",p, paswdpos[0]=pos[0]+1
for k2 in range(0,MAXD-1):
if pos[k2]>=n:
pos[k2]=0
pos[k2+1]=pos[k2+1]+1
koniec=0
for k2 in range(0,MAXD):
if pos[k2] >= n-1:
koniec=koniec+1Similar behaviuor I observed in older version of python (2.7) and correspondig library.
The zip archive is procted by simple password 'ABCD', the file is not big less tha 1MB.
Best regards Jozef
serhiy-storchaka
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields: ```python assignee = None closed_at = None created_at =
labels = ['type-bug', 'library']
title = "zipfile zipfile.BadZipFile: Bad CRC-32 for file '11_02_2019.pdf'"
updated_at =
user = 'https://bugs.python.org/JozefCernak'
```
bugs.python.org fields:
```python
activity =
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation =
creator = 'Jozef Cernak'
dependencies = []
files = []
hgrepos = []
issue_num = 36573
keywords = []
message_count = 7.0
messages = ['339722', '339727', '339728', '339729', '339730', '339734', '339736']
nosy_count = 4.0
nosy_names = ['twouters', 'alanmcintyre', 'serhiy.storchaka', 'Jozef Cernak']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue36573'
versions = ['Python 3.5']
```