public static IEnumerable <UrlAcl> GetAllBindings()
        {
            HttpApi.ThrowWin32ExceptionIfError(HttpApi.HttpInitialize(
                                                   HttpApi.HttpApiVersion, HttpApi.HTTP_INITIALIZE_CONFIG, IntPtr.Zero));
            try
            {
                var       szQuery           = Marshal.SizeOf(typeof(URLACL_QUERY));
                var       pQuery            = Marshal.AllocHGlobal(szQuery);
                var       szOutputBuffer    = 4096;
                const int szMaxOutputBuffer = 4194304 /* 4 mb */;
                var       pOutputBuffer     = Marshal.AllocHGlobal(szOutputBuffer);

                try
                {
                    for (int i = 0; i < int.MaxValue; i++)
                    {
                        // setup the query
                        var query = new URLACL_QUERY();
                        query.dwToken   = i;
                        query.QueryDesc = URLACL_QUERY_TYPE.HttpServiceConfigQueryNext;
                        Marshal.StructureToPtr(query, pQuery, false);

                        while (true)
                        {
                            int szRequiredOutputBuffer;
                            var result = HttpApi.HttpQueryServiceConfiguration(IntPtr.Zero,
                                                                               HttpApi.HTTP_SERVICE_CONFIG_ID.HttpServiceConfigUrlAclInfo,
                                                                               pQuery, szQuery, pOutputBuffer, szOutputBuffer, out szRequiredOutputBuffer, IntPtr.Zero);

                            if (result == HttpApi.ERROR_NO_MORE_ITEMS)
                            {
                                yield break;
                            }
                            else if (result == HttpApi.ERROR_INSUFFICIENT_BUFFER)
                            {
                                if (szOutputBuffer >= szMaxOutputBuffer)
                                {
                                    throw new InvalidOperationException();
                                }

                                Marshal.FreeHGlobal(pOutputBuffer);
                                Marshal.AllocHGlobal(szOutputBuffer *= 2);
                                continue;
                            }
                            else if (result == HttpApi.NO_ERROR)
                            {
                                break;
                            }
                            else
                            {
                                throw new Win32Exception((int)result);
                            }
                        }

                        var output = (URLACL_SET)Marshal.PtrToStructure(pOutputBuffer, typeof(URLACL_SET));
                        yield return(new UrlAcl(output.KeyDesc.pUrlPrefix, output.ParamDesc.pStringSecurityDescriptor));
                    }
                }
                finally
                {
                    Marshal.FreeHGlobal(pQuery);
                    Marshal.FreeHGlobal(pOutputBuffer);
                }
            }
            finally
            {
                HttpApi.HttpTerminate(HttpApi.HTTP_INITIALIZE_CONFIG, IntPtr.Zero);
            }
        }
        public bool Bind(CertificateBinding binding)
        {
            bool bindingUpdated = false;

            HttpApi.CallHttpApi(
                delegate {
                GCHandle sockAddrHandle     = SockaddrInterop.CreateSockaddrStructure(binding.IpPort);
                IntPtr pIpPort              = sockAddrHandle.AddrOfPinnedObject();
                var httpServiceConfigSslKey = new HttpApi.HTTP_SERVICE_CONFIG_SSL_KEY(pIpPort);

                byte[] hash         = GetHash(binding.Thumbprint);
                GCHandle handleHash = GCHandle.Alloc(hash, GCHandleType.Pinned);
                var options         = binding.Options;
                var configSslParam  = new HttpApi.HTTP_SERVICE_CONFIG_SSL_PARAM {
                    AppId = binding.AppId,
                    DefaultCertCheckMode = (options.DoNotVerifyCertificateRevocation ? HttpApi.CertCheckModes.DoNotVerifyCertificateRevocation : 0)
                                           | (options.VerifyRevocationWithCachedCertificateOnly ? HttpApi.CertCheckModes.VerifyRevocationWithCachedCertificateOnly : 0)
                                           | (options.EnableRevocationFreshnessTime ? HttpApi.CertCheckModes.EnableRevocationFreshnessTime : 0)
                                           | (options.NoUsageCheck ? HttpApi.CertCheckModes.NoUsageCheck : 0),
                    DefaultFlags = (options.NegotiateCertificate ? HttpApi.HTTP_SERVICE_CONFIG_SSL_FLAG.NEGOTIATE_CLIENT_CERT : 0)
                                   | (options.UseDsMappers ? HttpApi.HTTP_SERVICE_CONFIG_SSL_FLAG.USE_DS_MAPPER : 0)
                                   | (options.DoNotPassRequestsToRawFilters ? HttpApi.HTTP_SERVICE_CONFIG_SSL_FLAG.NO_RAW_FILTER : 0),
                    DefaultRevocationFreshnessTime       = (int)options.RevocationFreshnessTime.TotalSeconds,
                    DefaultRevocationUrlRetrievalTimeout = (int)options.RevocationUrlRetrievalTimeout.TotalMilliseconds,
                    pSslCertStoreName        = binding.StoreName,
                    pSslHash                 = handleHash.AddrOfPinnedObject(),
                    SslHashLength            = hash.Length,
                    pDefaultSslCtlIdentifier = options.SslCtlIdentifier,
                    pDefaultSslCtlStoreName  = options.SslCtlStoreName
                };

                var configSslSet = new HttpApi.HTTP_SERVICE_CONFIG_SSL_SET {
                    ParamDesc = configSslParam,
                    KeyDesc   = httpServiceConfigSslKey
                };

                IntPtr pInputConfigInfo = Marshal.AllocCoTaskMem(
                    Marshal.SizeOf(typeof(HttpApi.HTTP_SERVICE_CONFIG_SSL_SET)));
                Marshal.StructureToPtr(configSslSet, pInputConfigInfo, false);

                try {
                    uint retVal = HttpApi.HttpSetServiceConfiguration(IntPtr.Zero,
                                                                      HttpApi.HTTP_SERVICE_CONFIG_ID.HttpServiceConfigSSLCertInfo,
                                                                      pInputConfigInfo,
                                                                      Marshal.SizeOf(configSslSet),
                                                                      IntPtr.Zero);

                    if (HttpApi.ERROR_ALREADY_EXISTS != retVal)
                    {
                        HttpApi.ThrowWin32ExceptionIfError(retVal);
                    }
                    else
                    {
                        retVal = HttpApi.HttpDeleteServiceConfiguration(IntPtr.Zero,
                                                                        HttpApi.HTTP_SERVICE_CONFIG_ID.HttpServiceConfigSSLCertInfo,
                                                                        pInputConfigInfo,
                                                                        Marshal.SizeOf(configSslSet),
                                                                        IntPtr.Zero);
                        HttpApi.ThrowWin32ExceptionIfError(retVal);

                        retVal = HttpApi.HttpSetServiceConfiguration(IntPtr.Zero,
                                                                     HttpApi.HTTP_SERVICE_CONFIG_ID.HttpServiceConfigSSLCertInfo,
                                                                     pInputConfigInfo,
                                                                     Marshal.SizeOf(configSslSet),
                                                                     IntPtr.Zero);
                        HttpApi.ThrowWin32ExceptionIfError(retVal);
                        bindingUpdated = true;
                    }
                } finally {
                    Marshal.FreeCoTaskMem(pInputConfigInfo);
                    if (handleHash.IsAllocated)
                    {
                        handleHash.Free();
                    }
                    if (sockAddrHandle.IsAllocated)
                    {
                        sockAddrHandle.Free();
                    }
                }
            });
            return(bindingUpdated);
        }
        private static CertificateBinding[] QueryInternal()
        {
            var result = new List <CertificateBinding>();

            HttpApi.CallHttpApi(
                delegate {
                uint token = 0;

                uint retVal;
                do
                {
                    var inputConfigInfoQuery = new HttpApi.HTTP_SERVICE_CONFIG_SSL_QUERY {
                        QueryDesc = HttpApi.HTTP_SERVICE_CONFIG_QUERY_TYPE.HttpServiceConfigQueryNext,
                        dwToken   = token,
                    };

                    IntPtr pInputConfigInfo = Marshal.AllocCoTaskMem(
                        Marshal.SizeOf(typeof(HttpApi.HTTP_SERVICE_CONFIG_SSL_QUERY)));
                    Marshal.StructureToPtr(inputConfigInfoQuery, pInputConfigInfo, false);

                    IntPtr pOutputConfigInfo = IntPtr.Zero;
                    int returnLength         = 0;

                    try {
                        int inputConfigInfoSize = Marshal.SizeOf(inputConfigInfoQuery);
                        retVal = HttpApi.HttpQueryServiceConfiguration(IntPtr.Zero,
                                                                       HttpApi.HTTP_SERVICE_CONFIG_ID.HttpServiceConfigSSLCertInfo,
                                                                       pInputConfigInfo,
                                                                       inputConfigInfoSize,
                                                                       pOutputConfigInfo,
                                                                       returnLength,
                                                                       out returnLength,
                                                                       IntPtr.Zero);
                        if (HttpApi.ERROR_NO_MORE_ITEMS == retVal)
                        {
                            break;
                        }
                        if (HttpApi.ERROR_INSUFFICIENT_BUFFER == retVal)
                        {
                            pOutputConfigInfo = Marshal.AllocCoTaskMem(returnLength);

                            try {
                                retVal = HttpApi.HttpQueryServiceConfiguration(IntPtr.Zero,
                                                                               HttpApi.HTTP_SERVICE_CONFIG_ID.HttpServiceConfigSSLCertInfo,
                                                                               pInputConfigInfo,
                                                                               inputConfigInfoSize,
                                                                               pOutputConfigInfo,
                                                                               returnLength,
                                                                               out returnLength,
                                                                               IntPtr.Zero);
                                HttpApi.ThrowWin32ExceptionIfError(retVal);

                                var outputConfigInfo = (HttpApi.HTTP_SERVICE_CONFIG_SSL_SET)Marshal.PtrToStructure(
                                    pOutputConfigInfo, typeof(HttpApi.HTTP_SERVICE_CONFIG_SSL_SET));
                                var resultItem = CreateCertificateBindingInfo(outputConfigInfo);
                                result.Add(resultItem);
                                token++;
                            } finally {
                                Marshal.FreeCoTaskMem(pOutputConfigInfo);
                            }
                        }
                        else
                        {
                            HttpApi.ThrowWin32ExceptionIfError(retVal);
                        }
                    } finally {
                        Marshal.FreeCoTaskMem(pInputConfigInfo);
                    }
                } while (HttpApi.NOERROR == retVal);
            });

            return(result.ToArray());
        }
        private static CertificateBinding QueryExact(IPEndPoint ipPort)
        {
            CertificateBinding result = null;

            uint retVal;

            HttpApi.CallHttpApi(
                delegate {
                GCHandle sockAddrHandle = SockaddrInterop.CreateSockaddrStructure(ipPort);
                IntPtr pIpPort          = sockAddrHandle.AddrOfPinnedObject();
                var sslKey = new HttpApi.HTTP_SERVICE_CONFIG_SSL_KEY(pIpPort);

                var inputConfigInfoQuery = new HttpApi.HTTP_SERVICE_CONFIG_SSL_QUERY {
                    QueryDesc = HttpApi.HTTP_SERVICE_CONFIG_QUERY_TYPE.HttpServiceConfigQueryExact,
                    KeyDesc   = sslKey
                };

                IntPtr pInputConfigInfo = Marshal.AllocCoTaskMem(
                    Marshal.SizeOf(typeof(HttpApi.HTTP_SERVICE_CONFIG_SSL_QUERY)));
                Marshal.StructureToPtr(inputConfigInfoQuery, pInputConfigInfo, false);

                IntPtr pOutputConfigInfo = IntPtr.Zero;
                int returnLength         = 0;

                try {
                    int inputConfigInfoSize = Marshal.SizeOf(inputConfigInfoQuery);
                    retVal = HttpApi.HttpQueryServiceConfiguration(IntPtr.Zero,
                                                                   HttpApi.HTTP_SERVICE_CONFIG_ID.HttpServiceConfigSSLCertInfo,
                                                                   pInputConfigInfo,
                                                                   inputConfigInfoSize,
                                                                   pOutputConfigInfo,
                                                                   returnLength,
                                                                   out returnLength,
                                                                   IntPtr.Zero);
                    if (retVal == HttpApi.ERROR_FILE_NOT_FOUND)
                    {
                        return;
                    }

                    if (HttpApi.ERROR_INSUFFICIENT_BUFFER == retVal)
                    {
                        pOutputConfigInfo = Marshal.AllocCoTaskMem(returnLength);
                        try {
                            retVal = HttpApi.HttpQueryServiceConfiguration(IntPtr.Zero,
                                                                           HttpApi.HTTP_SERVICE_CONFIG_ID.HttpServiceConfigSSLCertInfo,
                                                                           pInputConfigInfo,
                                                                           inputConfigInfoSize,
                                                                           pOutputConfigInfo,
                                                                           returnLength,
                                                                           out returnLength,
                                                                           IntPtr.Zero);
                            HttpApi.ThrowWin32ExceptionIfError(retVal);

                            var outputConfigInfo =
                                (HttpApi.HTTP_SERVICE_CONFIG_SSL_SET)
                                Marshal.PtrToStructure(pOutputConfigInfo, typeof(HttpApi.HTTP_SERVICE_CONFIG_SSL_SET));
                            result = CreateCertificateBindingInfo(outputConfigInfo);
                        } finally {
                            Marshal.FreeCoTaskMem(pOutputConfigInfo);
                        }
                    }
                    else
                    {
                        HttpApi.ThrowWin32ExceptionIfError(retVal);
                    }
                } finally {
                    Marshal.FreeCoTaskMem(pInputConfigInfo);
                    if (sockAddrHandle.IsAllocated)
                    {
                        sockAddrHandle.Free();
                    }
                }
            });

            return(result);
        }