Re: Cryptographic service provider (CSP) could not be found for this algorithm.
From: Svein Terje Gaup (stgaup_at_broadpark.no.spam)
Date: 09/15/04
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Date: Wed, 15 Sep 2004 22:14:28 +0200
Perhaps this will help:
http://groups.google.com/groups?hl=en&lr=&ie=UTF-8&safe=off&threadm=433601c37c63%24788f2740%24a501280a%40phx.gbl&rnum=7&prev=/groups%3Fq%3Dsite:msdn.microsoft.com%2B%2522Cryptographic%2Bservice%2Bprovider%2B(CSP)%2Bcould%2Bnot%2Bbe%2Bfound%2Bfor%2Bthis%2Balgorithm%2522%26hl%3Den%26lr%3D%26ie%3DUTF-8%26safe%3Doff%26selm%3D433601c37c63%2524788f2740%2524a501280a%2540phx.gbl%26rnum%3D7
Sincerely
Svein Terje Gaup
"Sven-Torben Janus" <s-tjanus@gmx.de> wrote in message
news:chl94q$qp6$05$1@news.t-online.com...
> I'm running an ASP.NET webapplication on a Windows 2000 Server SP4 machine
> with .Net Framework 1.0 installed.
>
> The ASP.Net application uses impersonation (windows domain account). This
> is
> needed for communication between two servers (some ldap stuff).
> Furthermore the application uses FormsAuthentication. At some point the
> FomrAuthentication.Decrypt method is called. At this point I get the
> following error:
>
>
> Cryptographic service provider (CSP) could not be found for this
> algorithm.
> Description: An unhandled exception occurred during the execution of the
> current web request.
> Please review the stack trace for more information about the error and
> where
> it originated in the code.
>
> Exception Details:
> System.Security.Cryptography.CryptographicException:
> Cryptographic service provider (CSP) could not be found for this
> algorithm.
>
> Source Error:
> An unhandled exception was generated during the execution of the current
> web
> request. Information regarding the origin and location of the exception
> can
> be identified using the exception stack trace below.
>
> Stack Trace:
>
> [CryptographicException: Cryptographic service provider
> (CSP) could not be found for this algorithm.]
>
> System.Security.Cryptography.DESCryptoServiceProvider..ctor() +239
> System.Web.Security.FormsAuthentication.Initialize() +242
> System.Web.Security.FormsAuthenticationModule.OnEnter(Object source,
> EventArgs eventArgs) +146
> System.Web.SyncEventExecutionStep.Execute() +60
> System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean&
> completedSynchronously) +87
>
>
>
>
> The application runs fine on another Win2K SP4 machine and also on some
> other WinXP machines.
> I tried to install the Windows 2000 High Encryption Package. But that
> didn't
> solve the problem.
> The error doesn't occur when I turn impersonation off. But the application
> needs impersonation so this is no solution.
>
> So what to do ?
> I searched msdn and the internet but I couldn't find anything that solves
> the problem.
>
> Any help is appreciatet.
>
> Thanks in advance.
>
> Sven-Torben
>
>
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