PowerBuilder

Encrypt Already Existing Zip

See more Zip Examples

To encrypt an already existing non-encrypted .zip, the application must open the .zip, set the encryption related properties, and then re-write. PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Zip
integer li_NumFilesUnzipped

li_Success = 0

// This requires the Chilkat Zip API to have been previously unlocked.
// See Unlock Chilkat Zip for sample code.

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

// Unzip to a temp directory.
li_NumFilesUnzipped = loo_Zip.Unzip("qa_output/tmp")
if li_NumFilesUnzipped < 0 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

// Clear the zip object.
loo_Zip.NewZip("qa_output/aesTest.zip")

// Indicate that 128-bit AES encryption is to be used when writing the .zip
loo_Zip.Encryption = 4
loo_Zip.EncryptKeyLength = 128

// Set the password.
loo_Zip.EncryptPassword = "secret"

// Append the files.
loo_Zip.AppendFromDir = "qa_output/tmp"
li_Success = loo_Zip.AppendFiles("*.*",1)
if li_Success <> 1 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

// Write the .zip and close it.
li_Success = loo_Zip.WriteZipAndClose()
if li_Success <> 1 then
    Write-Debug loo_Zip.LastErrorText
    destroy loo_Zip
    return
end if

Write-Debug "Success."


destroy loo_Zip