Error exporting RSA key container via aspnet_regiis

Discussion in 'ASP .Net Security' started by dpomt, Oct 16, 2006.

  1. dpomt

    dpomt Guest


    I have an issue exporting a RSA key container via aspnet_regiis.
    I am using
    aspnet_regiis -px "HoKeyCont7" HoKeyCont7.xml -pri
    and I get the following (german) error message:
    Exporting RSA Keys to file...
    Schlüssel ist im angegebenen Status nicht gültig.
    (translation might be: key invalid in specified status)

    If I ommit the "-pri" option, the export succeeds without errors. However, I
    need the "-pri" option to use the RSA key to decrypt the encrypted stuff on
    a webserver.

    Background information:
    I have added a configProtectedData section to my web.config
    <add name="MyProtectedDataProviderName2"
    System.Configuration, Version=, Culture=neutral,
    PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL"
    useMachineContainer="true" />

    and I am encrypting the wanted section programmatically:
    Configuration config = WebConfigurationManager.OpenMappedWebConfiguration
    (webConfigurationFileMap, "/");
    ConfigurationSection cs = config.GetSection(strSection);

    Encryption (as well as decryption) on my local dev machine work both well.

    What I need is to export the RSA key with the -pri option.

    Any suggestions?
    dpomt, Oct 16, 2006
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  2. Hello dpomt,

    As for the aspnet_regiis.exe tool, it can help generate and export some
    machine stored RSA key. And you're right that in order to export the full
    public/private key pairs, we need to use -px with -pri options.

    As for the exporting error you encountered, regardless of the environment
    or framework installing problem, I'm wondering how did you originally
    create this RSA key. When creating the RSA key, we need to specify the
    "-exp" option so as to make it exportable, have you done this when creating
    your RSA key?

    Here is a msdn article which has demonstrated how to create and export such
    a RSA key for encrypting .net 2.0 applciation's configuration file.

    #How To: Encrypt Configuration Sections in ASP.NET 2.0 Using RSA

    If you've already followed the correct steps from creating key to exporting
    key, I would suggest you duplicate the same steps on some other machine
    with .net framework 2.0 installed. If other machine works well, this should
    be an machine specific issue.

    Hope this helps. Please feel free to let me know if you have any new


    Steven Cheng

    Microsoft MSDN Online Support Lead


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    This posting is provided "AS IS" with no warranties, and confers no rights.
    Steven Cheng[MSFT], Oct 17, 2006
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  3. dpomt

    dpomt Guest

    Hello Steven,

    thanks for your quick reply!

    I have had read the article you mentioned before - but I have re-read it.
    And I just noticed that I have forgot to explicitly create the RSA Key using
    aspnet_regiis -pc "MyKeyName" -exp

    Now, everythings works fine.

    Thanks and best regards,
    dpomt, Oct 17, 2006
  4. Hi Dieter,

    Glad that you've got it working.

    Have a good day!


    Steven Cheng

    Microsoft MSDN Online Support Lead

    This posting is provided "AS IS" with no warranties, and confers no rights.
    Steven Cheng[MSFT], Oct 18, 2006
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