(C) Open a Zip Archive

See more Zip Examples

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

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#include <C_CkZip.h>

void ChilkatSample(void)
    {
    HCkZip zip;
    BOOL success;

    zip = CkZip_Create();

    // Open a non-encrypted .zip
    success = CkZip_OpenZip(zip,"qa_data/zips/sample.zip");
    if (success != TRUE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkZip_Dispose(zip);
        return;
    }

    printf("Num entries = %d\n",CkZip_getNumEntries(zip));

    // ...
    // ...

    CkZip_CloseZip(zip);

    // ----------------------------------------------------------------------------
    // 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)
    CkZip_putDecryptPassword(zip,"thePassword");

    success = CkZip_OpenZip(zip,"qa_data/zips/encryptedSamples/ziptest_256.zip");
    if (success != TRUE) {
        printf("%s\n",CkZip_lastErrorText(zip));
        CkZip_Dispose(zip);
        return;
    }

    printf("Num entries = %d\n",CkZip_getNumEntries(zip));

    // ...
    // ...

    CkZip_CloseZip(zip);


    CkZip_Dispose(zip);

    }