update main projects

Emby.Server.Core/Cryptography/X509Extension.cs

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+//
+// X509Extension.cs: Base class for all X.509 extensions.
+//
+// Author:
+//	Sebastien Pouliot  <sebastien@ximian.com>
+//
+// (C) 2003 Motus Technologies Inc. (http://www.motus.com)
+// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+// 
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//
+
+using System;
+using System.Globalization;
+using System.Text;
+
+namespace Emby.Server.Core.Cryptography
+{
+    /*
+	 * Extension  ::=  SEQUENCE  {
+	 *	extnID      OBJECT IDENTIFIER,
+	 *	critical    BOOLEAN DEFAULT FALSE,
+	 *	extnValue   OCTET STRING  
+	 * }
+	 */
+    public class X509Extension {
+
+		protected string extnOid;
+		protected bool extnCritical;
+		protected ASN1 extnValue;
+
+		protected X509Extension () 
+		{
+			extnCritical = false;
+		}
+
+		public X509Extension (ASN1 asn1) 
+		{
+			if ((asn1.Tag != 0x30) || (asn1.Count < 2))
+				throw new ArgumentException (("Invalid X.509 extension."));
+			if (asn1[0].Tag != 0x06)
+				throw new ArgumentException (("Invalid X.509 extension."));
+
+			extnOid = ASN1Convert.ToOid (asn1[0]);
+			extnCritical = ((asn1[1].Tag == 0x01) && (asn1[1].Value[0] == 0xFF));
+			// last element is an octet string which may need to be decoded
+			extnValue = asn1 [asn1.Count - 1];
+			if ((extnValue.Tag == 0x04) && (extnValue.Length > 0) && (extnValue.Count == 0)) {
+				try {
+					ASN1 encapsulated = new ASN1 (extnValue.Value);
+					extnValue.Value = null;
+					extnValue.Add (encapsulated);
+				}
+				catch {
+					// data isn't ASN.1
+				}
+			}
+			Decode ();
+		}
+
+		public X509Extension (X509Extension extension)
+		{
+			if (extension == null)
+				throw new ArgumentNullException ("extension");
+			if ((extension.Value == null) || (extension.Value.Tag != 0x04) || (extension.Value.Count != 1))
+				throw new ArgumentException (("Invalid X.509 extension."));
+
+			extnOid = extension.Oid;
+			extnCritical = extension.Critical;
+			extnValue = extension.Value;
+			Decode ();
+		}
+
+		// encode the extension *into* an OCTET STRING
+		protected virtual void Decode () 
+		{
+		}
+
+		// decode the extension from *inside* an OCTET STRING
+		protected virtual void Encode ()
+		{
+		}
+
+		public ASN1 ASN1 {
+			get {
+				ASN1 extension = new ASN1 (0x30);
+				extension.Add (ASN1Convert.FromOid (extnOid));
+				if (extnCritical)
+					extension.Add (new ASN1 (0x01, new byte [1] { 0xFF }));
+				Encode ();
+				extension.Add (extnValue);
+				return extension;
+			}
+		}
+
+		public string Oid {
+			get { return extnOid; }
+		}
+
+		public bool Critical {
+			get { return extnCritical; }
+			set { extnCritical = value; }
+		}
+
+		// this gets overrided with more meaningful names
+		public virtual string Name {
+			get { return extnOid; }
+		}
+
+		public ASN1 Value {
+			get {
+				if (extnValue == null) {
+					Encode ();
+				}
+				return extnValue;
+			}
+		}
+
+		public override bool Equals (object obj) 
+		{
+			if (obj == null)
+				return false;
+			
+			X509Extension ex = (obj as X509Extension);
+			if (ex == null)
+				return false;
+
+			if (extnCritical != ex.extnCritical)
+				return false;
+			if (extnOid != ex.extnOid)
+				return false;
+			if (extnValue.Length != ex.extnValue.Length)
+				return false;
+			
+                        for (int i=0; i < extnValue.Length; i++) {
+				if (extnValue [i] != ex.extnValue [i])
+					return false;
+			}
+			return true;
+		}
+
+		public byte[] GetBytes () 
+		{
+			return ASN1.GetBytes ();
+		}
+
+		public override int GetHashCode () 
+		{
+			// OID should be unique in a collection of extensions
+			return extnOid.GetHashCode ();
+		}
+
+		private void WriteLine (StringBuilder sb, int n, int pos) 
+		{
+			byte[] value = extnValue.Value;
+			int p = pos;
+			for (int j=0; j < 8; j++) {
+				if (j < n) {
+					sb.Append (value [p++].ToString ("X2", CultureInfo.InvariantCulture));
+					sb.Append (" ");
+				}
+				else
+					sb.Append ("   ");
+			}
+			sb.Append ("  ");
+			p = pos;
+			for (int j=0; j < n; j++) {
+				byte b = value [p++];
+				if (b < 0x20)
+					sb.Append (".");
+				else
+					sb.Append (Convert.ToChar (b));
+			}
+			sb.Append (Environment.NewLine);
+		}
+
+		public override string ToString () 
+		{
+			StringBuilder sb = new StringBuilder ();
+			int div = (extnValue.Length >> 3);
+			int rem = (extnValue.Length - (div << 3));
+			int x = 0;
+			for (int i=0; i < div; i++) {
+				WriteLine (sb, 8, x);
+				x += 8;
+			}
+			WriteLine (sb, rem, x);
+			return sb.ToString ();
+		}
+	}
+}