/// <summary>
/// Signs the electronic invoice using the given certificate & RSA key
/// </summary>
/// <param name="eInvoice">The electronic invoice</param>
/// <param name="certificate">The certificate</param>
/// <param name="key">The RSA Key</param>
/// <returns></returns>
public XAdESSignatureVerifier Sign(X509Certificate2 certificate, RSA key)
{
if (certificate == null)
{
throw new ArgumentNullException("certificate cannot be null");
}
if (key == null)
{
throw new ArgumentNullException("key cannot be null");
}
var document = this.ToXmlDocument();
var signedXml = new XAdESSignedXml(document);
// Set the key to sign
signedXml.SigningKey = key;
signedXml.SetSignatureInfo()
.SetKeyInfo(certificate, (RSA)certificate.PublicKey.Key) // Key Info
.SetQualifyingPropertiesObject(certificate) // Add XAdES references
.ComputeSignature(); // Compute Signature
// Import the signed XML node
document.DocumentElement.AppendChild(document.ImportNode(signedXml.GetXml(), true));
return(new XAdESSignatureVerifier(document));
}
public void Sign(Stream xml, Stream signature, string signedElementXPath, X509Certificate certificate, AsymmetricKeyParameter key, PolicyIdentifier policyId)
{
XmlDocument xmlDoc = new XmlDocument();
xmlDoc.PreserveWhitespace = true;
xmlDoc.Load(xml);
XAdESSignedXml signedXML = new XAdESSignedXml(xmlDoc);
signedXML.SigningKey = key;
signedXML.SignedInfo.SignatureMethod = "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256";
signedXML.Certificate = certificate;
signedXML.SignedElementXPath = signedElementXPath;
signedXML.PolicyId = policyId;
signedXML.SignedInfo.CanonicalizationMethod = "http://www.w3.org/2001/10/xml-exc-c14n#";
signedXML.ComputeXAdESSignature();
XmlElement xmlDigitalSignature = signedXML.GetXml();
//xmlDoc.DocumentElement.AppendChild(xmlDoc.ImportNode(xmlDigitalSignature, true));
XmlTextWriter wr = new XmlTextWriter(signature, Encoding.UTF8);
wr.Formatting = Formatting.None;
xmlDigitalSignature.WriteTo(wr);
wr.Flush();
signature.Position = 0;
}
/// <summary>
/// Verify the signature against an asymetric
/// algorithm and return the result.
/// </summary>
/// <param name="eInvoice"></param>
/// <param name="Key"></param>
/// <returns></returns>
/// <remarks>http://social.msdn.microsoft.com/Forums/hu-HU/netfxbcl/thread/d6a4fe9f-7d2e-419c-ab19-9e57c75ba90f</remarks>
public bool CheckSignature()
{
XAdESSignedXml signedXml = new XAdESSignedXml(this.signedDocument);
XmlNamespaceManager nsmgr = XsdSchemas.CreateXadesNamespaceManager(this.signedDocument);
// Load the signature node.
signedXml.LoadXml((XmlElement)this.signedDocument.SelectSingleNode("//ds:Signature", nsmgr));
// Check the signature against the passed asymetric key
// and return the result.
return(signedXml.CheckSignature());
}
