System.Security.Cryptography.CryptographicException: The system cannot find the file specified.

Anyone seen this error when attempting to use a key to encrypt data from a webservice? The error is driving me up the wall I can't get it to work even though I am using an absolute reference to the keyfiles in my web.config. Does any users need specific access to a key?

Thanks,

Tom

 

Try referring to this link http://groups.google.com/group/micr...anguages.vb/browse_frm/thread/c5d0fc2d6921bc0

I believe the issue is caused by the constructor attempting to use the key container for the currently logged in user. Since the ASPNET user is never logged in, the operation will fail.

rcp
DiscountASP.NET
www.DiscountASP.NET

 

Hi rcp thanks very much it sounds feasible but I can't change the code which constructs the encryption as it is within a 3rd party DLL. I am not actually using a keystore anyway I just placed the certs in a directory and point the DLL at them do they need to be installed one is a pfx the other is a cer.


Tom

 

As I understand it, the application uses some keystore for temporary storagewhen working with certificates. So the component will need to specify the machine's keystore instead of the default user keystore. Unfortunately, this is the only way to get it to work.

Aristotle

DiscountASP.NET
www.DiscountASP.NET

 

Ok umfortunatly as the component I am using is 3rd party I can't use the machine key store for the cert is there no other way to get this working?

I have seen other people having no issue directly referencing a cert in there local directory on other hosting enviroments it's something which would actually stop me from using this hosting as I dont want to pay to have the cert installed in the machine store try and find the thumb print and then find out it still doesnt work due to some config issue with IIS or the ASP.Net wp it's becoming a real show stopper.

 

Aristotle:

I am facing the same issue that Loki reported.

I am using the example that comes with the RSACryptoServiceProvider documentation


Sub RSAPersistKeyInCSP(ByVal ContainerName As String)
Try
' Create a new instance of CspParameters. Pass
' 13 to specify a DSA container or 1 to specify
' an RSA container. The default is 1.
Dim cspParams As New CspParameters

' Specify the container name using the passed variable.
cspParams.KeyContainerName = ContainerName

'Create a new instance of RSACryptoServiceProvider to generate
'a new key pair. Pass the CspParameters class to persist the
'key in the container.
Dim RSAalg As New RSACryptoServiceProvider(cspParams) '<---------------------------------------------This line generates the error

'Indicate that the key was persisted.
Console.WriteLine("The RSA key was persisted in the container, ""{0}"".", ContainerName)
Catch e As CryptographicException
Console.WriteLine(e.Message)
End Try
End Sub


Could you please tell me how to specify the machine storage?


Thank you.