Opc.Ua.WindowsCertificateStore.OpenStore C# (CSharp) Method

        private IntPtr OpenStore(bool readOnly, bool createAlways, bool throwIfNotExist)
        {
            IntPtr wszStoreName = IntPtr.Zero;
            IntPtr hStore = IntPtr.Zero;

            try
            {
                // check for a valid name.
                if (String.IsNullOrEmpty(m_symbolicName))
                {
                    if (throwIfNotExist)
                    {
                        throw ServiceResultException.Create(
                            StatusCodes.BadConfigurationError,
                            "WindowsCertificateStore object has not been initialized properly.");
                    }

                    return IntPtr.Zero;
                }

	            // allocate the store base name.
	            wszStoreName = DuplicateString(m_symbolicName);

                uint dwFlags = GetFlags(m_storeType);

                if (readOnly)
                {
                    dwFlags |= CERT_STORE_READONLY_FLAG;
                }

                // open or create the store.
                if (!readOnly && createAlways)
                {
                    hStore = NativeMethods.CertOpenStore(
                       new IntPtr(CERT_STORE_PROV_SYSTEM),
                       0,
                       IntPtr.Zero,
                       dwFlags | CERT_STORE_CREATE_NEW_FLAG,
                       wszStoreName);
                }
                else
                {
                    hStore = NativeMethods.CertOpenStore(
                       new IntPtr(CERT_STORE_PROV_SYSTEM),
                       0,
                       IntPtr.Zero,
                       dwFlags | CERT_STORE_OPEN_EXISTING_FLAG,
                       wszStoreName);
                }

                // check result.
	            if (hStore == IntPtr.Zero)
	            {
                    int dwError = Marshal.GetLastWin32Error();

                    // try to open an existing store if create failed.
                    if (!readOnly && createAlways)
                    {
                        hStore = NativeMethods.CertOpenStore(
                           new IntPtr(CERT_STORE_PROV_SYSTEM),
                           0,
                           IntPtr.Zero,
                           dwFlags | CERT_STORE_OPEN_EXISTING_FLAG,
                           wszStoreName);
                    }

                    if (hStore == IntPtr.Zero)
                    {
                        // throw error.
                        if (throwIfNotExist)
                        {
                            throw ServiceResultException.Create(
                                StatusCodes.BadUnexpectedError,
                                "Could not open the certificate store.\r\nType={0}, Name={1}, Error={2:X8}",
                                m_storeType,
                                m_symbolicName,
                                dwError);
                        }

                        // graceful failure if store not found.
                        return IntPtr.Zero;
                    }
	            }

                // return the handle.
                return hStore;
            }
            finally
            {
                if (wszStoreName != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(wszStoreName);
                }
            }
        }