Hi!
I try to make digital signature of the blob and check it , but on check (
signature created and seems OK ) I catch exception :
"An XmlDocument context is required to resolve the Reference Uri ."
If instead of line
reference.Uri = "";
If I put here some correct Uri - like
reference.Uri = http://www.microsoft.com
No exception on CheckSignature() happen and resut is true
Is it possible to do with blob and without URI?
I tried to set : reference.Uri = "Body" but catched exception too
Here the code ( C# ) :
string str = "<Body>aaaaaaaaaaaaaaaaaa</Body>" ; // blob I want to sign
XmlTextReader r = new XmlTextReader(new StringReader(str));
XmlDocument document = new XmlDocument();
document.Load(r);
SignedXml signedXml = new SignedXml(document);
RSA key = RSA.Create();
signedXml.SigningKey = key;
Reference reference = new Reference();
reference.Uri = ""; // If I put here some correct Uri - like
"http://www.microsoft.com"
signedXml.AddReference(reference);
KeyInfo keyInfo = new KeyInfo();
keyInfo.AddClause(new RSAKeyValue(key));
signedXml.KeyInfo = keyInfo;
signedXml.ComputeSignature();
XmlElement xmlDigitalSignature = signedXml.GetXml();
StringWriter sw = new StringWriter();
XmlTextWriter xmltw = new XmlTextWriter(sw);
xmlDigitalSignature.WriteTo(xmltw);
string s = sw.ToString();
xmltw.Close();
XmlTextReader rr = new XmlTextReader(new StringReader(s));
XmlDocument xmlDocument = new XmlDocument();
xmlDocument.Load(rr);
signedXml = new SignedXml();
XmlNodeList nodeList = xmlDocument.GetElementsByTagName("Signature");
signedXml.LoadXml((XmlElement)nodeList[0]);
// Check the signature and return the result.
try
{
b = signedXml.CheckSignature();
}
catch(CryptographicException e)
{
Console.WriteLine(e.Message);
}
TIA
Arkady
