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Unzip an AES Encrypted Text File directly into a String Variable

A common need is to unzip from an AES encrypted Zip archive directly into a string variable, such that the unencrypted file never resides on disk, even temporarily. This example shows how to do it.

Download Chilkat C++ Libraries for VC++ 8.0 / Win32

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#include <CkZip.h>
#include <CkZipEntry.h>
#include <CkString.h>

void ChilkatSample(void)
    {
    CkZip zip;

    bool success;

    //  Any string unlocks the component for the 1st 30-days.
    success = zip.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        printf("%s\n",zip.lastErrorText());
        return;
    }

    //  This example opens a WinZip-compatible AES encrypted
    //  .zip that contains a single file: hamlet.xml.

    //  It decrypts and unzips hamlet.xml directly into a string
    //  variable.
    zip.SetPassword("secret");
    success = zip.OpenZip("hamlet.zip");
    if (success != true) {
        printf("%s\n",zip.lastErrorText());
        return;
    }

    CkZipEntry *entry = 0;
    CkString xmlText;

    entry = zip.GetEntryByName("hamlet.xml");
    if (!(entry == 0 )) {
        xmlText = entry->inflateToString2();
        printf("%s\n",(const char *)xmlText);
        delete entry;
    }
    else {
        printf("Failed to find entry in zip\n");
    }


    }

Need a specific example? Send a request to support@chilkatsoft.com

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