private System.Security.Cryptography.Xml.Signature SignXml(XmlDocument xmlDoc, RSA Key)
{
if (xmlDoc == null)
{
throw new ArgumentException(nameof(xmlDoc));
}
if (Key == null)
{
throw new ArgumentException(nameof(Key));
}
SignedXml signedXml = new SignedXml(xmlDoc);
signedXml.SigningKey = (AsymmetricAlgorithm)Key;
Reference reference = new Reference();
reference.Uri = "";
XmlDsigEnvelopedSignatureTransform signatureTransform = new XmlDsigEnvelopedSignatureTransform();
reference.AddTransform((Transform)signatureTransform);
signedXml.AddReference(reference);
signedXml.ComputeSignature();
XmlElement xml = signedXml.GetXml();
System.Security.Cryptography.Xml.Signature signature = signedXml.Signature;
xmlDoc.DocumentElement.AppendChild(xmlDoc.ImportNode((XmlNode)xml, true));
return(signature);
}
public SignedXml ()
{
m_signature = new Signature ();
m_signature.SignedInfo = new SignedInfo ();
hashes = new Hashtable (2); // 98% SHA1 for now
}
public static void SignXmlFile(string fileName, ref string signedContent, RSA key)
{
// Check the arguments.
if (fileName == null)
{
throw new ArgumentNullException("fileName");
}
if (signedContent == null)
{
throw new ArgumentNullException("signedFileName");
}
if (key == null)
{
throw new ArgumentNullException("key");
}
// Create a new XML document.
XmlDocument doc = new XmlDocument();
// Format the document to ignore white spaces.
doc.PreserveWhitespace = false;
// Load the passed XML file using it's name.
//doc.Load(new XmlTextReader(FileName));
doc.LoadXml(fileName);
// Create a SignedXml object.
SignedXml signedXml = new SignedXml(doc);
// Add the key to the SignedXml document.
signedXml.SigningKey = key;
// Get the signature object from the SignedXml object.
System.Security.Cryptography.Xml.Signature XMLSignature = signedXml.Signature;
// Create a reference to be signed. Pass ""
// to specify that all of the current XML
// document should be signed.
System.Security.Cryptography.Xml.Reference reference = new System.Security.Cryptography.Xml.Reference("");
// Add an enveloped transformation to the reference.
XmlDsigEnvelopedSignatureTransform env = new XmlDsigEnvelopedSignatureTransform();
reference.AddTransform(env);
// Add the Reference object to the Signature object.
XMLSignature.SignedInfo.AddReference(reference);
// Add an RSAKeyValue KeyInfo (optional; helps recipient find key to validate).
System.Security.Cryptography.Xml.KeyInfo keyInfo = new System.Security.Cryptography.Xml.KeyInfo();
keyInfo.AddClause(new RSAKeyValue((RSA)key));
// Add the KeyInfo object to the Reference object.
XMLSignature.KeyInfo = keyInfo;
// Compute the signature.
signedXml.ComputeSignature();
// Get the XML representation of the signature and save
// it to an XmlElement object.
XmlElement xmlDigitalSignature = signedXml.GetXml();
// Append the element to the XML document.
doc.DocumentElement.AppendChild(doc.ImportNode(xmlDigitalSignature, true));
if (doc.FirstChild is XmlDeclaration)
{
doc.RemoveChild(doc.FirstChild);
}
signedContent = doc.InnerXml;
}
public SignedXml()
{
m_signature = new Signature();
m_signature.SignedInfo = new SignedInfo();
hashes = new Hashtable(2); // 98% SHA1 for now
}
