1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "remoting/host/setup/oauth_helper.h"
6
7#include "base/strings/stringprintf.h"
8#include "google_apis/google_api_keys.h"
9#include "net/base/escape.h"
10#include "url/url_parse.h"
11
12namespace {
13
14std::string GetComponent(const std::string& url,
15                         const url::Component component) {
16  if (component.len < 0) {
17    return std::string();
18  }
19  return url.substr(component.begin, component.len);
20}
21
22}  // namespace
23
24namespace remoting {
25
26std::string GetOauthScope() {
27  return
28      "https://www.googleapis.com/auth/chromoting "
29      "https://www.googleapis.com/auth/googletalk "
30      "https://www.googleapis.com/auth/userinfo.email ";
31}
32
33std::string GetDefaultOauthRedirectUrl() {
34  return
35      "https://chromoting-oauth.talkgadget.google.com/talkgadget/oauth/"
36      "chrome-remote-desktop/rel/kgngmbheleoaphbjbaiobfdepmghbfah";
37}
38
39std::string GetOauthStartUrl(const std::string& redirect_url) {
40  return base::StringPrintf(
41      "https://accounts.google.com/o/oauth2/auth"
42      "?scope=%s"
43      "&redirect_uri=%s"
44      "&response_type=code"
45      "&client_id=%s"
46      "&access_type=offline"
47      "&approval_prompt=force",
48      net::EscapeUrlEncodedData(GetOauthScope(), true).c_str(),
49      redirect_url.c_str(),
50      net::EscapeUrlEncodedData(google_apis::GetOAuth2ClientID(
51          google_apis::CLIENT_REMOTING), true).c_str());
52}
53
54std::string GetOauthCodeInUrl(const std::string& url,
55                              const std::string& redirect_url) {
56  url::Parsed url_parsed;
57  ParseStandardURL(url.c_str(), url.length(), &url_parsed);
58  url::Parsed redirect_url_parsed;
59  ParseStandardURL(redirect_url.c_str(), redirect_url.length(),
60                   &redirect_url_parsed);
61  if (GetComponent(url, url_parsed.scheme) !=
62      GetComponent(redirect_url, redirect_url_parsed.scheme)) {
63    return std::string();
64  }
65  if (GetComponent(url, url_parsed.host) !=
66      GetComponent(redirect_url, redirect_url_parsed.host)) {
67    return std::string();
68  }
69  url::Component query = url_parsed.query;
70  url::Component key;
71  url::Component value;
72  while (ExtractQueryKeyValue(url.c_str(), &query, &key, &value)) {
73    if (GetComponent(url, key) == "code") {
74      return GetComponent(url, value);
75    }
76  }
77  return std::string();
78}
79
80}  // namespace remoting
81