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(.NET Core C#) PKCS11 Find Certificate with Key Usage on Smart Card or USB TokenSee more PKCS11 ExamplesDemonstrates how to find and return the 1st certificate on a smart card or USB token with a desired intended key usage. Note: This example requires Chilkat v9.5.0.91 or later.
// This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Note: Chilkat's PKCS11 implementation runs on Windows, Linux, Mac OS X, and other supported operating systems. Chilkat.Pkcs11 pkcs11 = new Chilkat.Pkcs11(); pkcs11.SharedLibPath = "aetpkss1.dll"; bool success = pkcs11.Initialize(); if (success == false) { Debug.WriteLine(pkcs11.LastErrorText); return; } // Pass -1 for the slotID to open a session on the first non-empty slot. int slotID = -1; // Open a session. bool readWrite = true; success = pkcs11.OpenSession(slotID,readWrite); if (success == false) { Debug.WriteLine(pkcs11.LastErrorText); return; } // Make it an authenticated session by calling Login. // // If we don't authenticate, then we won't be able to see the private keys, and thus // we won't know which certificates have an associated private key stored on the smart card. // The smart card PIN is passed to the Login method. // userType 1 indicates a "Normal User". int userType = 1; string pin = "0000"; success = pkcs11.Login(userType,pin); if (success == false) { Debug.WriteLine(pkcs11.LastErrorText); success = pkcs11.CloseSession(); return; } // -------------------------------------------------------------------------- Chilkat.Cert cert = new Chilkat.Cert(); // Find a certificate with an intended key usage. // Possible key usages to find are: // // DigitalSignature // NonRepudiation // KeyEncipherment // DataEncipherment // CertificateSigning // CrlSigning // // To find a cert having any one of several usages, pass a comma-separated list of usages: success = pkcs11.FindCert("keyUsage","NonRepudiation,DigitalSignature",cert); if (success == true) { Debug.WriteLine("Cert with private key: " + cert.SubjectCN); } else { Debug.WriteLine("No certificates having the intended key usage were found."); } // -------------------------------------------------------------------------- // Revert to an unauthenticated session by calling Logout. success = pkcs11.Logout(); if (success == false) { Debug.WriteLine(pkcs11.LastErrorText); success = pkcs11.CloseSession(); return; } // When finished, close the session. // It is important to close the session (memory leaks will occur if the session is not properly closed). success = pkcs11.CloseSession(); if (success == false) { Debug.WriteLine(pkcs11.LastErrorText); return; } Debug.WriteLine("Success."); |
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