Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmpp/xmppauth.cc

Index: webrtc/libjingle/xmpp/xmppauth.cc
diff --git a/webrtc/libjingle/xmpp/xmppauth.cc b/webrtc/libjingle/xmpp/xmppauth.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a3d2f678496c3f97f97ce5865a6d59d1a3559079
--- /dev/null
+++ b/webrtc/libjingle/xmpp/xmppauth.cc
@@ -0,0 +1,88 @@
+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/libjingle/xmpp/xmppauth.h"
+
+#include <algorithm>
+
+#include "webrtc/libjingle/xmpp/constants.h"
+#include "webrtc/libjingle/xmpp/saslcookiemechanism.h"
+#include "webrtc/libjingle/xmpp/saslplainmechanism.h"
+
+XmppAuth::XmppAuth() : done_(false) {
+}
+
+XmppAuth::~XmppAuth() {
+}
+
+void XmppAuth::StartPreXmppAuth(const buzz::Jid& jid,
+                                const rtc::SocketAddress& server,
+                                const rtc::CryptString& pass,
+                                const std::string& auth_mechanism,
+                                const std::string& auth_token) {
+  jid_ = jid;
+  passwd_ = pass;
+  auth_mechanism_ = auth_mechanism;
+  auth_token_ = auth_token;
+  done_ = true;
+
+  SignalAuthDone();
+}
+
+static bool contains(const std::vector<std::string>& strings,
+                     const std::string& string) {
+  return std::find(strings.begin(), strings.end(), string) != strings.end();
+}
+
+std::string XmppAuth::ChooseBestSaslMechanism(
+    const std::vector<std::string>& mechanisms,
+    bool encrypted) {
+  // First try Oauth2.
+  if (GetAuthMechanism() == buzz::AUTH_MECHANISM_OAUTH2 &&
+      contains(mechanisms, buzz::AUTH_MECHANISM_OAUTH2)) {
+    return buzz::AUTH_MECHANISM_OAUTH2;
+  }
+
+  // A token is the weakest auth - 15s, service-limited, so prefer it.
+  if (GetAuthMechanism() == buzz::AUTH_MECHANISM_GOOGLE_TOKEN &&
+      contains(mechanisms, buzz::AUTH_MECHANISM_GOOGLE_TOKEN)) {
+    return buzz::AUTH_MECHANISM_GOOGLE_TOKEN;
+  }
+
+  // A cookie is the next weakest - 14 days.
+  if (GetAuthMechanism() == buzz::AUTH_MECHANISM_GOOGLE_COOKIE &&
+      contains(mechanisms, buzz::AUTH_MECHANISM_GOOGLE_COOKIE)) {
+    return buzz::AUTH_MECHANISM_GOOGLE_COOKIE;
+  }
+
+  // As a last resort, use plain authentication.
+  if (contains(mechanisms, buzz::AUTH_MECHANISM_PLAIN)) {
+    return buzz::AUTH_MECHANISM_PLAIN;
+  }
+
+  // No good mechanism found
+  return "";
+}
+
+buzz::SaslMechanism* XmppAuth::CreateSaslMechanism(
+    const std::string& mechanism) {
+  if (mechanism == buzz::AUTH_MECHANISM_OAUTH2) {
+    return new buzz::SaslCookieMechanism(
+        mechanism, jid_.Str(), auth_token_, "oauth2");
+  } else if (mechanism == buzz::AUTH_MECHANISM_GOOGLE_TOKEN) {
+    return new buzz::SaslCookieMechanism(mechanism, jid_.Str(), auth_token_);
+  // } else if (mechanism == buzz::AUTH_MECHANISM_GOOGLE_COOKIE) {
+  //   return new buzz::SaslCookieMechanism(mechanism, jid.Str(), sid_);
+  } else if (mechanism == buzz::AUTH_MECHANISM_PLAIN) {
+    return new buzz::SaslPlainMechanism(jid_, passwd_);
+  } else {
+    return NULL;
+  }
+}