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(DataFlex) Open a Zip ArchiveSee more Zip ExamplesDemonstrates how to open a zip, or an encrypted .zip, or a legacy password-protected .zip.
Use ChilkatAx-9.5.0-win32.pkg Procedure Test Handle hoZip Boolean iSuccess String sTemp1 Integer iTemp1 Get Create (RefClass(cComChilkatZip)) To hoZip If (Not(IsComObjectCreated(hoZip))) Begin Send CreateComObject of hoZip End // Open a non-encrypted .zip Get ComOpenZip Of hoZip "qa_data/zips/sample.zip" To iSuccess If (iSuccess <> True) Begin Get ComLastErrorText Of hoZip To sTemp1 Showln sTemp1 Procedure_Return End Get ComNumEntries Of hoZip To iTemp1 Showln "Num entries = " iTemp1 // ... // ... Send ComCloseZip To hoZip // ---------------------------------------------------------------------------- // 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) Set ComDecryptPassword Of hoZip To "thePassword" Get ComOpenZip Of hoZip "qa_data/zips/encryptedSamples/ziptest_256.zip" To iSuccess If (iSuccess <> True) Begin Get ComLastErrorText Of hoZip To sTemp1 Showln sTemp1 Procedure_Return End Get ComNumEntries Of hoZip To iTemp1 Showln "Num entries = " iTemp1 // ... // ... Send ComCloseZip To hoZip End_Procedure |
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