(Java) Verify XML Digital Signature

Verifies XML signatures in an XML file.

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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.

    CkStringBuilder sbXml = new CkStringBuilder();
    boolean success = sbXml.LoadFile("qa_data/xml_dsig_verify/csioz_sample.xml","utf-8");
    if (success != true) {
        System.out.println("Failed to load XML file.");
        return;
        }

    CkXmlDSig dsig = new CkXmlDSig();

    // First load the XML containing the signatures to be verified.
    success = dsig.LoadSignatureSb(sbXml);
    if (success != true) {
        System.out.println(dsig.lastErrorText());
        return;
        }

    // It's possible that an XML document can contain multiple signatures.
    // Each can be verified as follows:
    int i = 0;
    while (i < dsig.get_NumSignatures()) {
        // Select the Nth signature by setting the Selector property.
        dsig.put_Selector(i);

        // The bVerifyReferenceDigests argument determines if we want
        // to also verify each reference digest.  If set to false,
        // then only the SignedInfo part of the Signature is verified.
        boolean bVerifyReferenceDigests = true;
        boolean bVerified = dsig.VerifySignature(bVerifyReferenceDigests);
        System.out.println("Signature " + (i+1) + " verified = " + bVerified);

        i = i+1;
        }
  }
}