dart:io | Support connection renegotiation (rehandshake) on SecureSocket.

tests/standalone/io/secure_socket_renegotiate_client.dart

+// Copyright (c) 2013, 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.
+
+// Client for secure_socket_renegotiate_test, that runs in a subprocess.
+// The test verifies that client certificates work, if the client and server
+// are in separate processes, and that connection renegotiation can request
+// a client certificate to be sent.
+
+import "dart:async";
+import "dart:io";
+
+const HOST_NAME = "localhost";
+const CERTIFICATE = "localhost_cert";
+
+
+class ExpectException implements Exception {
+  ExpectException(this.message);
+  String toString() => message;
+  String message;
+}
+
+
+void expectEquals(expected, actual) {
+  if (actual != expected) {
+    throw new ExpectException('Expected $expected, found $actual');
+  }
+}
+
+
+void expect(condition) {
+  if (!condition) {
+    throw new ExpectException('');
+  }
+}
+
+
+void runClient(int port) {
+  SecureSocket.connect(HOST_NAME, port, sendClientCertificate: true)
+    .then((SecureSocket socket) {
+      X509Certificate certificate = socket.peerCertificate;
+      expect(certificate != null);
+      expectEquals('CN=localhost', certificate.subject);
+      expectEquals('CN=myauthority', certificate.issuer);
+      StreamIterator<String> input = new StreamIterator(socket
+          .transform(new StringDecoder())
+          .transform(new LineTransformer()));
+      socket.writeln('first');
+      input.moveNext()
+        .then((success) {
+          expect(success);
+          expectEquals('first reply', input.current);
+          socket.renegotiate();
+          socket.writeln('renegotiated');
+          return input.moveNext();
+        })
+        .then((success) {
+          expect(success);
+          expectEquals('server renegotiated', input.current);
+          X509Certificate certificate = socket.peerCertificate;
+          expect(certificate != null);
+          expectEquals("CN=localhost", certificate.subject);
+          expectEquals("CN=myauthority", certificate.issuer);
+          socket.writeln('second');
+          return input.moveNext();
+        })
+        .then((success) {
+          expect(success != true);
+          socket.close();
+        });
+    });
+}
+
+
+void main() {
+  final args = new Options().arguments;
+  SecureSocket.initialize(database: args[1], password: 'dartdart');
+  runClient(int.parse(args[0]));
+}