[docs] Import of Microsoft BCL Documentation.

[mono.git] / mcs / class / corlib / System.Security.Cryptography / RSAOAEPKeyExchangeDeformatter.cs

diff --git a/mcs/class/corlib/System.Security.Cryptography/RSAOAEPKeyExchangeDeformatter.cs b/mcs/class/corlib/System.Security.Cryptography/RSAOAEPKeyExchangeDeformatter.cs
index ceb4ba0b3d752d1f5ecdacdcae288231e55626ab..ecb8f2209e0d45a746c1a93eaf4aec21e3cc5c09 100644 (file)
--- a/mcs/class/corlib/System.Security.Cryptography/RSAOAEPKeyExchangeDeformatter.cs
+++ b/mcs/class/corlib/System.Security.Cryptography/RSAOAEPKeyExchangeDeformatter.cs
@@ -5,11 +5,7 @@
 //     Sebastien Pouliot <sebastien@ximian.com>
 //
 // (C) 2002 Motus Technologies Inc. (http://www.motus.com)
-// (C) 2004 Novell (http://www.novell.com)
-//
-
-//
-// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
+// Copyright (C) 2004-2006 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
@@ -31,20 +27,20 @@
 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 //
 
-using System;
 using System.Globalization;
+using System.Runtime.InteropServices;
 using Mono.Security.Cryptography;
 
 namespace System.Security.Cryptography { 
 
+       [ComVisible (true)]
        public class RSAOAEPKeyExchangeDeformatter : AsymmetricKeyExchangeDeformatter {
        
                private RSA rsa;
-               private string param;
+//             private string param;
        
                public RSAOAEPKeyExchangeDeformatter ()
                {
-                       rsa = null;
                }
        
                public RSAOAEPKeyExchangeDeformatter (AsymmetricAlgorithm key) 
@@ -59,8 +55,16 @@ namespace System.Security.Cryptography {
        
                public override byte[] DecryptKeyExchange (byte[] rgbData) 
                {
+                       if (rsa == null) {
+                               string msg = Locale.GetText ("No RSA key specified");
+                               throw new CryptographicUnexpectedOperationException (msg);
+                       }
                        SHA1 sha1 = SHA1.Create ();
-                       return PKCS1.Decrypt_OAEP (rsa, sha1, rgbData);
+                       byte[] result = PKCS1.Decrypt_OAEP (rsa, sha1, rgbData);
+                       if (result != null)
+                               return result;
+
+                       throw new CryptographicException (Locale.GetText ("OAEP decoding error."));
                }
        
                public override void SetKey (AsymmetricAlgorithm key)