Py7zLib Decompress Encrypted File Error

[fubuki-is-cat]

7Z Archive : test.7z Compress Software : BandiZip 6.14,build 25403,2018-06-19,x64 Runtime : Python 3.6.6 on Win32 OS : Windows 10 x64 build 1803 Decompress the archive without password encrypt,works fine,all file successfully decompressed, But when encrypt the archive with password "1234",py7zlib given the traceback:

Traceback (most recent call last): File ".\mainPrg.py", line 8, in archiveClass.decompressArchive(archiveClass.openArchive("test.7z","1234")) File "C:\Users\Vinyl\Desktop\py7ztest\archive7zip.py", line 33, in decompressArchive if (not cf.checkcrc()): File "C:\Program Files (x86)\Python36-32\lib\site-packages\pylzma-0.0.0.dev0-py3.6-win32.egg\py7zlib.py", line 780, in checkcrc data = self.read() File "C:\Program Files (x86)\Python36-32\lib\site-packages\pylzma-0.0.0.dev0-py3.6-win32.egg\py7zlib.py", line 632, in read data = getattr(self, decoder)(coder, data, level, num_coders) File "C:\Program Files (x86)\Python36-32\lib\site-packages\pylzma-0.0.0.dev0-py3.6-win32.egg\py7zlib.py", line 772, in _read_7z_aes256_sha256 result = cipher.decrypt(input) TypeError: data must be a multiple of 16 bytes, got 807

My Code :

archive7zip.py `#coding:utf-8

import pylzma import time import os from py7zlib import Archive7z,NoPasswordGivenError,WrongPasswordError,UTC

class Archive7Zip(object): def init(self): self.__openedFile = []

def openArchive(self,fileName,password = None):
    archive = open(fileName,"rb")
    self.__openedFile.append(archive)
    archive = Archive7z(archive,password)
    return archive

def decompressArchive(self,archive):
    fileNames = archive.getnames()
    for fileName in fileNames:
        paths = os.path.split(fileName)
    #   print (paths)
        for i in range(len(paths) - 1):
            if (len(paths) == 1):break
            try:
                os.makedirs(paths[i])
            except FileExistsError:
                break

        cf = archive.getmember(fileName)
        if (not cf.checkcrc()):
            print ("Check CRC Failed : %s" % filename)
            continue
        with open(fileName,"wb+") as f:
            f.write(cf.read())
            f.close()
        print ("Decompress \"%s\" Successfully." % fileName)

`

main.py `# coding:utf-8

from archive7zip import Archive7Zip

archiveClass = Archive7Zip()

archiveClass.decompressArchive(archiveClass.openArchive("test.7z","1234")) `

Can someone help me?I'm not good at English.

This is the archive file,decompress it for "test.7z",password = 1234 Archive.zip

[fubuki-is-cat]

This archive created by bandizip with maximum compress level.When I switched to 7-zip,the problem not solved. But using no compress can solve this problem.

[fancycode]

Thanks for reporting and providing a testcase!