(C) 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.

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#include <C_CkZip.h>
#include <C_CkZipEntry.h>

void ChilkatSample(void)
    {
    HCkZip zip;
    BOOL success;
    HCkZipEntry entry;
    int lineEndingBehavior;
    const char *srcCharset;
    const char *xmlText;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    zip = CkZip_Create();

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

    entry = CkZip_GetEntryByName(zip,"hamlet.xml");
    if (CkZip_getLastMethodSuccess(zip) == FALSE) {
        printf("Failed to find entry in zip\n");
        CkZip_Dispose(zip);
        return;
    }

    // lineEndingBehavior:
    // 0 = leave unchanged.
    // 1 = convert all to bare LF's
    // 2 = convert all to CRLF's
    lineEndingBehavior = 0;
    srcCharset = "utf-8";
    xmlText = CkZipEntry_unzipToString(entry,lineEndingBehavior,srcCharset);
    printf("%s\n",xmlText);
    CkZipEntry_Dispose(entry);


    CkZip_Dispose(zip);

    }