(C) Extract XML from FatturaPA .p7m

Demonstrates how to verify the signature and extract the XML from a FatturaPA .p7m file.

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#include <C_CkBinData.h>
#include <C_CkCrypt2.h>
#include <C_CkXml.h>

void ChilkatSample(void)
    {
    HCkBinData bd;
    BOOL success;
    HCkCrypt2 crypt;
    BOOL bVerified;
    HCkXml xml;

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

    bd = CkBinData_Create();
    success = CkBinData_LoadFile(bd,"qa_data/p7m/IT01879020517_abc.xml.p7m");
    if (success != TRUE) {
        printf("Failed to load the .p7m file\n");
        CkBinData_Dispose(bd);
        return;
    }

    crypt = CkCrypt2_Create();

    // Verify and extrct the payload contained within the .p7m.
    // In this case, the payload is the FatturaPA XML.
    // If successful, the resulting bd will contain only the XML.
    bVerified = CkCrypt2_OpaqueVerifyBd(crypt,bd);
    if (bVerified != TRUE) {
        printf("%s\n",CkCrypt2_lastErrorText(crypt));
        printf("Failed to extract and verify.\n");
        CkBinData_Dispose(bd);
        CkCrypt2_Dispose(crypt);
        return;
    }

    // Save the XML to a file.
    CkBinData_WriteFile(bd,"qa_output/zIT01879020517_abc.xml");

    // Alternatively, load into an XML object and emit.
    xml = CkXml_Create();
    CkXml_LoadXml(xml,CkBinData_getString(bd,"utf-8"));

    printf("%s\n",CkXml_getXml(xml));


    CkBinData_Dispose(bd);
    CkCrypt2_Dispose(crypt);
    CkXml_Dispose(xml);

    }