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(C#) Verify XAdES with External File ReferenceDemonstrates how to validate an XML digital signature that contains a reference to an external file. (This is one way of doing it..)
// 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.. Chilkat.StringBuilder sbXml = new Chilkat.StringBuilder(); bool success = sbXml.LoadFile("qa_data/xml_dsig_valid_samples/externalFile/test.pdf.XAdES","utf-8"); if (success == false) { Debug.WriteLine("Failed to load XAdES input file."); return; } Chilkat.XmlDSig validator = new Chilkat.XmlDSig(); // 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.ExternalRefDirs = "qa_data/externalFiles;qa_data/xml_dsig_valid_samples/externalFile;c:/someOtherDir"; success = validator.LoadSignatureSb(sbXml); if (success == false) { Debug.WriteLine(validator.LastErrorText); return; } // Validate signatures as usual.. int i = 0; while (i < validator.NumSignatures) { validator.Selector = i; bool valid = validator.VerifySignature(true); Debug.WriteLine("Signature " + Convert.ToString(i + 1) + " and all reference digests OK = " + Convert.ToString(valid)); i = i + 1; } |
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