Method C_Login returned CKR_SESSION_HANDLE_INVALID

[ozlemkzn]

Hello,

I am experiencing an issue as follows:

Method C_Login returned CKR_SESSION_HANDLE_INVALID

at Net.Pkcs11Interop.HighLevelAPI80.Session.Login(CKU userType, String pin) at PKCS11Service.Initialize() in PKCS11Service.cs:line 81 at PKCS11Service..ctor(IOptions"1 settings, ILogger"1 logger) in PKCS11\PKCS11Service.cs:line 55 at System.RuntimeMethodHandle.InvokeMethod(Object target, Span"1& arguments, Signature sig, Boolean constructor, Boolean wrapExceptions) at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor"2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor"2.VisitCallSite(ServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor"2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor"2.VisitCallSite(ServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceProvider.CreateServiceAccessor(Type serviceType) at System.Collections.Concurrent.ConcurrentDictionary"2.GetOrAdd(TKey key, Func"2 valueFactory) at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) at ConfigureServices.AppServices.<>c__DisplayClass0_0.<AddApplicationServices>b__40() in AppServices.cs:line 40 at System.Lazy"1.ViaFactory(LazyThreadSafetyMode mode) --- End of stack trace from previous location --- at System.Lazy"1.CreateValue()

Here it is my initialize function:

private void Initialize()
{
if (slot == null)
{
try
{
var slotList = pkcs11Library.GetSlotList(SlotsType.WithTokenPresent);
if (!slotList.Any())
throw new Exception("Could not find any slot");

            slot = slotList[0];
            slot.CloseAllSessions();
            var session = slot.OpenSession(SessionType.ReadOnly);
            if (session == null)
            {
                throw new Exception("Could not create new session on the given slot");
            }

            session.Login(CKU.CKU_USER, settings.Value.Password);

            session.FindObjectsInit(privateKeyAttributeList);
            var privateKeyObjectsFound = session.FindObjects(1);
            session.FindObjectsFinal();

            if (!privateKeyObjectsFound.Any() && privateKeyObjectsFound[0].ObjectId == CK.CK_INVALID_HANDLE)
            {
                throw new Exception("no private key with the lable was found");
            }

            keyHandle = privateKeyObjectsFound[0];

            session.FindObjectsInit(certificateAttributeList);
            var certificateObjectsFound = session.FindObjects(1);
            session.FindObjectsFinal();

            if (!certificateObjectsFound.Any() && certificateObjectsFound[0].ObjectId == CK.CK_INVALID_HANDLE)
            {
                throw new Exception("no certificate with the lable was found");
            }

            var foundAttributeValues = session.GetAttributeValue(certificateObjectsFound[0], new List<CKA>() { CKA.CKA_VALUE });
            certificate = new X509Certificate2(foundAttributeValues[0].GetValueAsByteArray());
        }
        catch (Exception exception)
        {
            slot = null;
            throw;
        }
    }
}

Could you please assist me in identifying the issue and suggest a solution? Thank you.