Import method of windows security encryption algorithm is not working in hosting environment

Question

I need to use RSA cryptography for encryption of data. I have used ImportPkcs8PrivateKey method of System.Security.Cryptography for importing private key. The code working fine in visual studio but only ImportPkcs8PrivateKey method is not working in hosting server. My Hosting server is windows 2019 and I have installed all hosting package.

var privateKeyBytes = Convert.FromBase64String(marchentPrivateKey);
int myarray;
var rsa = RSA.Create();
rsa.ImportPkcs8PrivateKey(privateKeyBytes, out myarray);
return rsa;

The following Error trace is generated in hosted server

 at lambda_method(Closure , Object )
   at Microsoft.Extensions.Internal.ObjectMethodExecutorAwaitable.Awaiter.GetResult()
   at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.AwaitableObjectResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeNextExceptionFilterAsync>g__Awaited|25_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)

What does *...is not working in hosting server...* mean? Which .NET version is running on the server? — Topaco, Jan 12 '23 at 12:07
@Topaco I am using .net core 3.1 and i have installed all from this link into server https://dotnet.microsoft.com/en-us/download/dotnet/3.1 , in visual studio no exception but in hosting server it didn't found ImportPkcs8PrivateKey method — MAT14, Jan 15 '23 at 04:35
[`ImportPkcs8PrivateKey()`](https://learn.microsoft.com/en-us/dotnet/api/system.security.cryptography.rsa.importpkcs8privatekey?view=netcore-3.1) is supported since .NET Core 3.0. So if you are really running .NET Core 3.1, then there is something wrong with your installation. — Topaco, Jan 15 '23 at 07:58
@Topaco I have updated the post with the error trace generating in server when calling import method — MAT14, Jan 15 '23 at 13:29

score 0 · Answer 1 · answered Jan 16 '23 at 10:03

Actually its issue of IIS setting. Cryptographic Service Provider try to store a key for certificate in the user store and if a profile was not available, a cryptographic context was not available. By default IIS Load User Profile is false. See for more details What exactly happens when I set LoadUserProfile of IIS pool?

Import method of windows security encryption algorithm is not working in hosting environment

1 Answers1