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(Visual FoxPro) Open a Zip ArchiveSee more Zip ExamplesDemonstrates how to open a zip, or an encrypted .zip, or a legacy password-protected .zip.
LOCAL loZip LOCAL lnSuccess * For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Zip') loZip = CreateObject('Chilkat.Zip') * Open a non-encrypted .zip lnSuccess = loZip.OpenZip("qa_data/zips/sample.zip") IF (lnSuccess <> 1) THEN ? loZip.LastErrorText RELEASE loZip CANCEL ENDIF ? "Num entries = " + STR(loZip.NumEntries) * ... * ... loZip.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) loZip.DecryptPassword = "thePassword" lnSuccess = loZip.OpenZip("qa_data/zips/encryptedSamples/ziptest_256.zip") IF (lnSuccess <> 1) THEN ? loZip.LastErrorText RELEASE loZip CANCEL ENDIF ? "Num entries = " + STR(loZip.NumEntries) * ... * ... loZip.CloseZip() RELEASE loZip |
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