(Unicode C) Verify XAdES with External File Reference

Demonstrates how to validate an XML digital signature that contains a reference to an external file. (This is one way of doing it..)

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#include <C_CkStringBuilderW.h>
#include <C_CkXmlDSigW.h>

void ChilkatSample(void)
    {
    HCkStringBuilderW sbXml;
    BOOL success;
    HCkXmlDSigW validator;
    int i;
    BOOL valid;

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

    // Load the XAdES file to be validated..
    sbXml = CkStringBuilderW_Create();
    success = CkStringBuilderW_LoadFile(sbXml,L"qa_data/xml_dsig_valid_samples/externalFile/test.pdf.XAdES",L"utf-8");
    if (success == FALSE) {
        wprintf(L"Failed to load XAdES input file.\n");
        CkStringBuilderW_Dispose(sbXml);
        return;
    }

    validator = CkXmlDSigW_Create();

    // Specify a set of absolute or relative directory paths to be searched for any external file references.
    // Directory paths are separated by semicolon chars.
    CkXmlDSigW_putExternalRefDirs(validator,L"qa_data/externalFiles;qa_data/xml_dsig_valid_samples/externalFile;c:/someOtherDir");

    success = CkXmlDSigW_LoadSignatureSb(validator,sbXml);
    if (success == FALSE) {
        wprintf(L"%s\n",CkXmlDSigW_lastErrorText(validator));
        CkStringBuilderW_Dispose(sbXml);
        CkXmlDSigW_Dispose(validator);
        return;
    }

    // Validate signatures as usual..
    i = 0;
    while (i < CkXmlDSigW_getNumSignatures(validator)) {
        CkXmlDSigW_putSelector(validator,i);

        valid = CkXmlDSigW_VerifySignature(validator,TRUE);
        wprintf(L"Signature %d and all reference digests OK = %d\n",i + 1,valid);

        i = i + 1;
    }



    CkStringBuilderW_Dispose(sbXml);
    CkXmlDSigW_Dispose(validator);

    }