(Chilkat2-Python) Open a Zip Archive

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Demonstrates how to open a zip, or an encrypted .zip, or a legacy password-protected .zip.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

zip = chilkat2.Zip()

# Open a non-encrypted .zip
success = zip.OpenZip("qa_data/zips/sample.zip")
if (success != True):
    print(zip.LastErrorText)
    sys.exit()

print("Num entries = " + str(zip.NumEntries))

# ...
# ...

zip.CloseZip()

# ----------------------------------------------------------------------------
# Open an encrypted zip...

# The two main types of encryption used in ZIP archives are Password-Protected and AES.
# 

# ---------------------------------------
# 1. Legacy Password-Protected Zip
# 
# This is the older and less secure method of encrypting ZIP archives. 
# It provides a basic level of security, but is considered weak by modern standards. 
# It is vulnerable to various attacks, including known-plaintext attacks and brute force attacks.
# Although Chilkat allows it, you shouldn't create new zip archives using legacy password-protection.

# ---------------------------------------
# 2. AES Encrypted Zip
# 
# AES encryption is a more modern and secure method for encrypting ZIP archives. 
# It provides strong encryption based on the AES algorithm, which is widely regarded as secure. 
# AES supports different key lengths, typically 128-bit, 192-bit, and 256-bit.

# When opening an encrypted zip, your application only needs to provide the correct password.
# The information about the type of encryption and the key length (if AES) is already embedded within the encrypted .zip.

# Provide the decrypt password because we are opening an existing .zip (decrypting)
zip.DecryptPassword = "thePassword"

success = zip.OpenZip("qa_data/zips/encryptedSamples/ziptest_256.zip")
if (success != True):
    print(zip.LastErrorText)
    sys.exit()

print("Num entries = " + str(zip.NumEntries))

# ...
# ...

zip.CloseZip()