Add implementation for current IT2Me auth.

remoting/protocol/simple_client_authenticator.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "remoting/protocol/simple_client_authenticator.h"
+
+#include "base/base64.h"
+#include "base/logging.h"
+#include "remoting/base/constants.h"
+#include "remoting/protocol/auth_util.h"
+#include "remoting/protocol/simple_client_channel_authenticator.h"
+#include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
+
+using buzz::QName;
+using buzz::XmlElement;
+
+namespace remoting {
+namespace protocol {
+
+namespace {
+const char kAuthenticationTag[] = "authentication";
+const char kAuthTokenTag[] = "auth-token";
+const char kCertificateTag[] = "certificate";
+}  // namespace
+
+SimpleClientAuthenticator::SimpleClientAuthenticator(
+    const std::string& local_jid,
+    const std::string& shared_secret)
+    : local_jid_(local_jid),
+      shared_secret_(shared_secret),
+      state_(MESSAGE_READY) {
+}
+
+SimpleClientAuthenticator::~SimpleClientAuthenticator() {
+}
+
+Authenticator::State SimpleClientAuthenticator::state() const {
+  return state_;
+}
+
+void SimpleClientAuthenticator::ProcessMessage(const XmlElement* message) {
+  DCHECK_EQ(state_, WAITING_MESSAGE);
+
+  // Parse the certificate.
+  const XmlElement* cert_tag =
+      message->FirstNamed(QName(kChromotingXmlNamespace, kCertificateTag));
+  if (cert_tag) {
+    std::string base64_cert = cert_tag->BodyText();
+    if (!base::Base64Decode(base64_cert, &remote_cert_)) {
+      LOG(ERROR) << "Failed to decode certificate received from the peer.";
+      remote_cert_ = "";

[Wez, 2011/11/22 22:58:05]

nit: Is there no .clear() or similar in std::string?

[Sergey Ulanov, 2011/11/23 02:02:25]

Done.

+    }
+  }
+
+  if (remote_cert_.empty()) {
+    state_ = REJECTED;
+  } else {
+    state_ = ACCEPTED;
+  }
+}
+
+XmlElement* SimpleClientAuthenticator::GetNextMessage() {
+  DCHECK_EQ(state_, MESSAGE_READY);
+
+  XmlElement* authentication_tag = new XmlElement(
+      QName(kChromotingXmlNamespace, kAuthenticationTag));
+
+  std::string token =
+      protocol::GenerateSupportAuthToken(local_jid_, shared_secret_);
+
+  XmlElement* auth_token_tag = new XmlElement(
+      QName(kChromotingXmlNamespace, kAuthTokenTag));
+  auth_token_tag->SetBodyText(token);
+  authentication_tag->AddElement(auth_token_tag);
+
+  state_ = WAITING_MESSAGE;
+  return authentication_tag;
+}
+
+ChannelAuthenticator*
+SimpleClientAuthenticator::CreateChannelAuthenticator() const {
+  DCHECK_EQ(state_, ACCEPTED);
+  return new SimpleClientChannelAuthenticator(remote_cert_, shared_secret_);
+};
+
+}  // namespace remoting
+}  // namespace protocol