jinx/pyinstxtractor
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Correctly calculate the python version, fixes #37

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The python version is stored as major*100 + minor

Details: https://github.com/pyinstaller/pyinstaller/commit/9f7c92
This commit is contained in:
extremecoders-re
2022-06-13 16:49:39 +05:30
committed by GitHub
parent fb7c13d7db
commit 957f830443
1 changed files with 7 additions and 6 deletions
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13
pyinstxtractor.py
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@@ -190,21 +190,22 @@ class PyInstArchive:
self.fPtr.seek(self.cookiePos, os.SEEK_SET)
# Read CArchive cookie
(magic, lengthofPackage, toc, tocLen, self.pyver) = \
(magic, lengthofPackage, toc, tocLen, pyver) = \
struct.unpack('!8siiii', self.fPtr.read(self.PYINST20_COOKIE_SIZE))
elif self.pyinstVer == 21:
self.fPtr.seek(self.cookiePos, os.SEEK_SET)
# Read CArchive cookie
(magic, lengthofPackage, toc, tocLen, self.pyver, pylibname) = \
(magic, lengthofPackage, toc, tocLen, pyver, pylibname) = \
struct.unpack('!8siiii64s', self.fPtr.read(self.PYINST21_COOKIE_SIZE))
except:
print('[!] Error : The file is not a pyinstaller archive')
return False
print('[+] Python version: {0}'.format(self.pyver))
self.pymaj, self.pymin = (pyver//100, pyver%100) if pyver >= 100 else (pyver//10, pyver%10)
print('[+] Python version: {0}.{1}'.format(self.pymaj, self.pymin))
# Additional data after the cookie
tailBytes = self.fileSize - self.cookiePos - (self.PYINST20_COOKIE_SIZE if self.pyinstVer == 20 else self.PYINST21_COOKIE_SIZE)
@@ -319,13 +320,13 @@ class PyInstArchive:
with open(filename, 'wb') as pycFile:
pycFile.write(pyc_magic) # pyc magic
if self.pyver >= 37: # PEP 552 -- Deterministic pycs
if self.pymaj >= 3 and self.pymin >= 7: # PEP 552 -- Deterministic pycs
pycFile.write(b'\0' * 4) # Bitfield
pycFile.write(b'\0' * 8) # (Timestamp + size) || hash
else:
pycFile.write(b'\0' * 4) # Timestamp
if self.pyver >= 33:
if self.pymaj >= 3 and self.pymin >= 3:
pycFile.write(b'\0' * 4) # Size parameter added in Python 3.3
pycFile.write(data)
@@ -346,7 +347,7 @@ class PyInstArchive:
# Skip PYZ extraction if not running under the same python version
if pyc_magic != pycHeader:
print('[!] Warning: This script is running in a different Python version than the one used to build the executable.')
print('[!] Please run this script in Python{0} to prevent extraction errors during unmarshalling'.format(self.pyver))
print('[!] Please run this script in Python {0}.{1} to prevent extraction errors during unmarshalling'.format(self.pymaj, self.pymin))
print('[!] Skipping pyz extraction')
return