"PV" <no_spam@no_spam.com> wrote in message
news:OMi8e07mGHA.1248@TK2MSFTNGP05.phx.gbl...
>I have found that RSACryptoServiceProvider.VerifyData sometimes hangs for
>several (typically 6 or more) seconds.  This is very irritating since a
>component that I am using makes this call every time a form in my
>application opens.  The entire application freezes.  Obviously it makes my
>application very sluggish.
>
> Mind you, on some machines the above always seems to be very quick.  And
> on others it can be quick for several minutes, and then start hanging for
> a while.
>
> I'm using .Net Framework 2.0.  Here is some sample code from my very basic
> "hello world" application, followed by the trace output (generated using
> Enterprise Library)...
>
>        public static void Trace(string message)
>        {
>                Logger.Write(message, "Trace", 0, 0,
> TraceEventType.Information);
>        }
>
>        private RSACryptoServiceProvider encryptionService = new
> RSACryptoServiceProvider();
>        private string publicKey = [I have an approximately 340 character
> xml formatted string here]
>        private string xmlData = [I have an approximately 470 character xml
> formatted string here]
>        private string Signature = [I have an approximately 200 character
> base 64 encoded string here]
>
>        private void button1_Click(object sender, EventArgs e)
>        {
>            Trace("Before encryptionService.FromXmlString");
>
>            encryptionService.FromXmlString(publicKey);
>            Trace("After
> LicenseProviderBase.EncryptionService.FromXmlString");
>
>            Trace("Before encryptionService.VerifyData");
>            bool result =
> encryptionService.VerifyData(Encoding.UTF8.GetBytes(this.xmlData),
>                   new SHA1Managed(),
> Convert.FromBase64String(this.Signature));
>            Trace("After encryptionService.VerifyData");
>        }
>
> ----------------------------------------
> Timestamp: 6/29/2006 4:54:07 PM
> Message: Before encryptionService.FromXmlString
> Category: Trace
> Priority: 0
> EventId: 0
> Severity: Information
> Title:
> Machine: CHL0130
> Application Domain: HelloWorld.exe
> Process Id: 3056
> Process Name: C:\Program Files\HelloWorld\HelloWorld.exe
> Win32 Thread Id: 3876
> Thread Name:
> Extended Properties:
> ----------------------------------------
> ----------------------------------------
> Timestamp: 6/29/2006 4:54:08 PM
> Message: After LicenseProviderBase.EncryptionService.FromXmlString
> Category: Trace
> Priority: 0
> EventId: 0
> Severity: Information
> Title:
> Machine: CHL0130
> Application Domain: HelloWorld.exe
> Process Id: 3056
> Process Name: C:\Program Files\HelloWorld\HelloWorld.exe
> Win32 Thread Id: 3876
> Thread Name:
> Extended Properties:
> ----------------------------------------
> ----------------------------------------
> Timestamp: 6/29/2006 4:54:08 PM
> Message: Before encryptionService.VerifyData
> Category: Trace
> Priority: 0
> EventId: 0
> Severity: Information
> Title:
> Machine: CHL0130
> Application Domain: HelloWorld.exe
> Process Id: 3056
> Process Name: C:\Program Files\HelloWorld\HelloWorld.exe
> Win32 Thread Id: 3876
> Thread Name:
> Extended Properties:
> ----------------------------------------
> ----------------------------------------
> Timestamp: 6/29/2006 4:54:14 PM
> Message: After encryptionService.VerifyData
> Category: Trace
> Priority: 0
> EventId: 0
> Severity: Information
> Title:
> Machine: CHL0130
> Application Domain: HelloWorld.exe
> Process Id: 3056
> Process Name: C:\Program Files\HelloWorld\HelloWorld.exe
> Win32 Thread Id: 3876
> Thread Name:
> Extended Properties:
> ----------------------------------------
>
>
>
>