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(C#) Get Certificates within XML SignatureDemonstrates how to get the certificates contained within an XML signature.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. Chilkat.StringBuilder sbXml = new Chilkat.StringBuilder(); // Load XML containing one or more signatures. bool success = sbXml.LoadFile("qa_data/xml_dsig_valid_samples/multipleSigners/sp.pdf.XAdES.xml","utf-8"); if (success == false) { Debug.WriteLine("Failed to load the XML file.."); return; } Chilkat.XmlDSig dsig = new Chilkat.XmlDSig(); // First load the XML containing the signatures to be verified. // Note that this particular Signature already contains the RSA public key that will be used // for verification. success = dsig.LoadSignatureSb(sbXml); if (success != true) { Debug.WriteLine(dsig.LastErrorText); return; } // For each signature, verify and also get the certificate(s) contained within each Signature. int i = 0; Chilkat.StringArray saCerts = new Chilkat.StringArray(); Chilkat.Cert cert = new Chilkat.Cert(); Debug.WriteLine("numSignatures = " + Convert.ToString(dsig.NumSignatures)); while (i < dsig.NumSignatures) { // Select the Nth signature by setting the Selector property. dsig.Selector = i; bool bVerifyReferenceDigests = true; bool bVerified = dsig.VerifySignature(bVerifyReferenceDigests); Debug.WriteLine("Signature " + Convert.ToString(i + 1) + " verified = " + Convert.ToString(bVerified)); // Get the certificates embedded in this signature. saCerts.Clear(); success = dsig.GetCerts(saCerts); if (success == true) { int j = 0; while (j < saCerts.Count) { success = cert.LoadFromBase64(saCerts.GetString(j)); if (success == true) { Debug.WriteLine(" " + cert.SubjectDN); } j = j + 1; } } i = i + 1; } |
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