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(Classic ASP) Open a Zip ArchiveSee more Zip ExamplesDemonstrates how to open a zip, or an encrypted .zip, or a legacy password-protected .zip.
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body> <% ' For versions of Chilkat < 10.0.0, use CreateObject("Chilkat_9_5_0.Zip") set zip = Server.CreateObject("Chilkat.Zip") ' Open a non-encrypted .zip success = zip.OpenZip("qa_data/zips/sample.zip") If (success <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( zip.LastErrorText) & "</pre>" Response.End End If Response.Write "<pre>" & Server.HTMLEncode( "Num entries = " & zip.NumEntries) & "</pre>" ' ... ' ... 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 <> 1) Then Response.Write "<pre>" & Server.HTMLEncode( zip.LastErrorText) & "</pre>" Response.End End If Response.Write "<pre>" & Server.HTMLEncode( "Num entries = " & zip.NumEntries) & "</pre>" ' ... ' ... zip.CloseZip %> </body> </html> |
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