Add secure sockets to dart:io

runtime/bin/tls_socket_patch.dart

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+patch class TlsSocket {
+  /* patch */ static void setCertificateDatabase(String pkcertDirectory)
+      native "TlsSocket_SetCertificateDatabase";
+}
+
+
+patch class _TlsFilter {
+  /* patch */ factory _TlsFilter() => new _TlsFilterImpl();
+}
+
+
+/**
+ * _TlsFilterImpl wraps a filter that encrypts and decrypts data travelling
+ * over a TLS encrypted socket.  The filter also handles the handshaking
+ * and certificate verification.
+ *
+ * The filter exposes its input and output buffers as Dart objects that
+ * are backed by an external C array of bytes, so that both Dart code and
+ * native code can access the same data.
+ */
+class _TlsFilterImpl extends NativeFieldWrapperClass1 implements _TlsFilter {
+  _TlsFilterImpl() {
+    buffers = new List<_TlsExternalBuffer>(_TlsSocket.NUM_BUFFERS);
+    for (int i = 0; i < _TlsSocket.NUM_BUFFERS; ++i) {
+      buffers[i] = new _TlsExternalBuffer();
+    }
+  }
+
+  void connect(String hostName, int port) native "TlsSocket_Connect";
+
+  void destroy() {
+    buffers = null;
+    _destroy();
+  }
+
+  void _destroy() native "TlsSocket_Destroy";
+
+  void handshake() native "TlsSocket_Handshake";
+
+  void init() native "TlsSocket_Init";
+
+  int processBuffer(int bufferIndex) native "TlsSocket_ProcessBuffer";
+
+  void registerHandshakeCompleteCallback(Function handshakeCompleteHandler)
+      native "TlsSocket_RegisterHandshakeCompleteCallback";
+
+  List<_TlsExternalBuffer> buffers;
+}