PowerBuilder

Open a Zip Archive

See more Zip Examples

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

integer li_rc
long li_Success
oleobject loo_Zip

li_Success = 0

loo_Zip = create oleobject
li_rc = loo_Zip.ConnectToNewObject("Chilkat.Zip")
if li_rc < 0 then
    destroy loo_Zip
    MessageBox("Error","Connecting to COM object failed")
    return
end if

//  Open a non-encrypted .zip
li_Success = loo_Zip.OpenZip("qa_data/zips/sample.zip")
if li_Success <> 1 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

Write-Debug "Num entries = " + string(loo_Zip.NumEntries)

//  ...
//  ...

loo_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)
loo_Zip.DecryptPassword = "thePassword"

li_Success = loo_Zip.OpenZip("qa_data/zips/encryptedSamples/ziptest_256.zip")
if li_Success <> 1 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

Write-Debug "Num entries = " + string(loo_Zip.NumEntries)

//  ...
//  ...

loo_Zip.CloseZip()


destroy loo_Zip