(PowerShell) Open a Zip Archive

See more Zip Examples

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

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

$zip = New-Object Chilkat.Zip

# Open a non-encrypted .zip
$success = $zip.OpenZip("qa_data/zips/sample.zip")
if ($success -ne $true) {
    $($zip.LastErrorText)
    exit
}

$("Num entries = " + $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 -ne $true) {
    $($zip.LastErrorText)
    exit
}

$("Num entries = " + $zip.NumEntries)

# ...
# ...

$zip.CloseZip()