C

Verify XAdES with External File Reference

See more XML Digital Signatures Examples

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

#include <C_CkStringBuilder.h>
#include <C_CkXmlDSig.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkStringBuilder sbXml;
    HCkXmlDSig validator;
    int i;
    BOOL valid;

    success = FALSE;

    // 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 = CkStringBuilder_Create();
    success = CkStringBuilder_LoadFile(sbXml,"qa_data/xml_dsig_valid_samples/externalFile/test.pdf.XAdES","utf-8");
    if (success == FALSE) {
        printf("Failed to load XAdES input file.\n");
        CkStringBuilder_Dispose(sbXml);
        return;
    }

    validator = CkXmlDSig_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.
    CkXmlDSig_putExternalRefDirs(validator,"qa_data/externalFiles;qa_data/xml_dsig_valid_samples/externalFile;c:/someOtherDir");

    success = CkXmlDSig_LoadSignatureSb(validator,sbXml);
    if (success == FALSE) {
        printf("%s\n",CkXmlDSig_lastErrorText(validator));
        CkStringBuilder_Dispose(sbXml);
        CkXmlDSig_Dispose(validator);
        return;
    }

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

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

        i = i + 1;
    }



    CkStringBuilder_Dispose(sbXml);
    CkXmlDSig_Dispose(validator);

    }