(Java) 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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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // 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..
    CkStringBuilder sbXml = new CkStringBuilder();
    boolean success = sbXml.LoadFile("qa_data/xml_dsig_valid_samples/externalFile/test.pdf.XAdES","utf-8");
    if (success == false) {
        System.out.println("Failed to load XAdES input file.");
        return;
        }

    CkXmlDSig validator = new CkXmlDSig();

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

    success = validator.LoadSignatureSb(sbXml);
    if (success == false) {
        System.out.println(validator.lastErrorText());
        return;
        }

    // Validate signatures as usual..
    int i = 0;
    while (i < validator.get_NumSignatures()) {
        validator.put_Selector(i);

        boolean valid = validator.VerifySignature(true);
        System.out.println("Signature " + (i+1) + " and all reference digests OK = " + valid);

        i = i+1;
        }
  }
}