mono/mcs/class/System.Security/System.Security.Cryptography.Xml/DSAKeyValue.cs

//
// DSAKeyValue.cs - DSA KeyValue implementation for XML Signature
//
// Author:
//	Sebastien Pouliot ([email protected])
//
// (C) 2002, 2003 Motus Technologies Inc. (http://www.motus.com)
//

using System.Security.Cryptography;
using System.Text;
using System.Xml;

namespace System.Security.Cryptography.Xml {

	public class DSAKeyValue : KeyInfoClause {

		static private string xmldsig = "http://www.w3.org/2000/09/xmldsig#";
		private DSA dsa;

		public DSAKeyValue () 
		{
			dsa = DSA.Create ();
		}

		public DSAKeyValue (DSA key) 
		{
			dsa = key;
		}

		public DSA Key 
		{
			get { return dsa; }
			set { dsa = value; }
		}

		public override XmlElement GetXml () 
		{
			StringBuilder sb = new StringBuilder ();
			sb.Append ("<KeyValue xmlns=\"");
			sb.Append (xmldsig);
			sb.Append ("\">");
			sb.Append (dsa.ToXmlString (false));
			sb.Append ("</KeyValue>");

			XmlDocument doc = new XmlDocument ();
			doc.LoadXml(sb.ToString ());
			return doc.DocumentElement;
		}

		public override void LoadXml (XmlElement value) 
		{
			if (value == null)
				throw new ArgumentNullException ();

			if ((value.LocalName == "KeyValue") && (value.NamespaceURI == xmldsig))
				dsa.FromXmlString (value.InnerXml);
			else
				throw new CryptographicException ("value");
		}
	}
}