CODEWITHSUNDEEP
c#.netx509certificate
NoWar
NoWar

Reputation: 37632

Get certificate KeyContainerName and other attributes

I am trying to sign XML with a custom generated certificate which is acessible via this code

private void buttonSelectCertificate_Click(object sender, EventArgs e)
{
   CertStoreLocation = (StoreLocation)cboStoreLocation.SelectedItem;
   CertStoreName = (StoreName)cboStoreName.SelectedItem;
   X509Store store = new X509Store(CertStoreName, CertStoreLocation);
            store.Open(OpenFlags.ReadOnly);
   X509Certificate2Collection scollection = X509Certificate2UI.SelectFromCollection(store.Certificates, "Certificate Select", "Select a certificate from the following list to get information on that certificate",  System.Security.Cryptography.X509Certificates.X509SelectionFlag.SingleSelection);
}

What I cannot get how to use properly X509Certificate2Collection scollection in order to fill out following properties.

Also I am not getting following idea:

If certificate is stored here My = 5 then have I use CspProviderFlags.UseMachineKeyStore ?

How can I get the KeyContainerName from X509Certificate2Collection scollection?

And finally maybe I am completely wrong in the way to get certificate attributes I need in order to populate CspParameters class, any clue?

Thank you for help!

// Get the key pair from the key store.
CspParameters parms = new CspParameters(1);         // PROV_RSA_FULL
parms.Flags = ??? CspProviderFlags.UseMachineKeyStore;  // Use Machine store
parms.KeyContainerName = ???;               // 
parms.KeyNumber = 2;                                // AT_SIGNATURE
RSACryptoServiceProvider csp = new RSACryptoServiceProvider(parms);

Upvotes: 1

Views: 3596

Answers (1)

NoWar
NoWar

Reputation: 37632

Here the answer

private void buttonSelectCertificate_Click(object sender, EventArgs e)
{
   CertStoreLocation = (StoreLocation)cboStoreLocation.SelectedItem;
   CertStoreName = (StoreName)cboStoreName.SelectedItem;
   X509Store store = new X509Store(CertStoreName, CertStoreLocation);
            store.Open(OpenFlags.ReadOnly);
   X509Certificate2Collection scollection = X509Certificate2UI.SelectFromCollection(store.Certificates, "Certificate Select", "Select a certificate from the following list to get information on that certificate",  System.Security.Cryptography.X509Certificates.X509SelectionFlag.SingleSelection);


  foreach (X509Certificate2 cert in scollection)
            {

                var rsa = cert.PrivateKey as RSACryptoServiceProvider;
                if (rsa == null) continue; // not smart card cert again

                if (!string.IsNullOrEmpty(rsa.CspKeyContainerInfo.KeyContainerName))
                {
                    // This is how we can get it! :)  
                    var keyContainerName = rsa.CspKeyContainerInfo.KeyContainerName;
                }
            }
}

And also we have use normally CspProviderFlags.UseMachineKeyStore

CspParameters parms = new CspParameters(1);         // PROV_RSA_FULL
parms.Flags = CspProviderFlags.UseMachineKeyStore;  // Use Machine store

Upvotes: 1

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