UnauthorizedAccessException: Access to the path 'c:\windows\system32\inetsrv\tempkey.rsa' is denied."

Question

I was trying to deploy an IdentityServer 4 app with ASP.NET core 2.2 into IIS in my local machine (Windows 10) and get the error:

An error occurred while starting the application. UnauthorizedAccessException: Access to the path 'c:\windows\system32\inetsrv\tempkey.rsa' is denied."

Its working with debugging mode but getting above while deploying in IIS.

Identity server 4 version - 2.3.2

Asp.net core 2.2

IIS 10.0.16

Can anyone help to solve this?

Answer 1

I had the same error and it was coming from the call to AddDeveloperSigningCredential() inside configure services. When I changed it to AddDeveloperSigningCredential( persistKey: false ), the error went away.

Here is entire function call block

public void ConfigureServices( IServiceCollection services )
{
    services.AddIdentityServer()
    .AddDeveloperSigningCredential( persistKey:false)
    .AddInMemoryApiResources( Config.GetApiResources() )
    .AddInMemoryClients( Config.GetClients() );
}