components/proximity_auth/cryptauth/cryptauth_client.cc

   1 // Copyright 2014 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 "base/bind.h"
   6 #include "base/command_line.h"
   7 #include "components/proximity_auth/cryptauth/cryptauth_access_token_fetcher.h"
   8 #include "components/proximity_auth/cryptauth/cryptauth_api_call_flow.h"
   9 #include "components/proximity_auth/cryptauth/cryptauth_client.h"
  10 #include "components/proximity_auth/cryptauth/proto/cryptauth_api.pb.h"
  11 #include "components/proximity_auth/switches.h"
  12 #include "net/url_request/url_request_context_getter.h"
  13
  14 namespace proximity_auth {
  15
  16 namespace {
  17
  18 // Default URL of Google APIs endpoint hosting CryptAuth.
  19 const char kDefaultCryptAuthHTTPHost[] = "https://www.googleapis.com";
  20
  21 // URL subpath hosting the CryptAuth service.
  22 const char kCryptAuthPath[] = "cryptauth/v1/";
  23
  24 // URL subpaths for each CryptAuth API.
  25 const char kGetMyDevicesPath[] = "deviceSync/getmydevices";
  26 const char kFindEligibleUnlockDevicesPath[] =
  27     "deviceSync/findeligibleunlockdevices";
  28 const char kSendDeviceSyncTicklePath[] = "deviceSync/senddevicesynctickle";
  29 const char kToggleEasyUnlockPath[] = "deviceSync/toggleeasyunlock";
  30 const char kSetupEnrollmentPath[] = "enrollment/setupenrollment";
  31 const char kFinishEnrollmentPath[] = "enrollment/finishenrollment";
  32
  33 // Query string of the API URL indicating that the response should be in a
  34 // serialized protobuf format.
  35 const char kQueryProtobuf[] = "?alt=proto";
  36
  37 // Creates the full CryptAuth URL for endpoint to the API with |request_path|.
  38 GURL CreateRequestUrl(const std::string& request_path) {
  39   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
  40   GURL google_apis_url =
  41       GURL(command_line->HasSwitch(switches::kCryptAuthHTTPHost)
  42                ? command_line->GetSwitchValueASCII(switches::kCryptAuthHTTPHost)
  43                : kDefaultCryptAuthHTTPHost);
  44   return google_apis_url.Resolve(kCryptAuthPath + request_path +
  45                                  kQueryProtobuf);
  46 }
  47
  48 }  // namespace
  49
  50 CryptAuthClient::CryptAuthClient(
  51     scoped_ptr<CryptAuthAccessTokenFetcher> access_token_fetcher,
  52     scoped_refptr<net::URLRequestContextGetter> url_request_context)
  53     : url_request_context_(url_request_context),
  54       access_token_fetcher_(access_token_fetcher.Pass()),
  55       weak_ptr_factory_(this) {
  56 }
  57
  58 CryptAuthClient::~CryptAuthClient() {
  59 }
  60
  61 void CryptAuthClient::GetMyDevices(
  62     const cryptauth::GetMyDevicesRequest& request,
  63     const GetMyDevicesCallback& callback,
  64     const ErrorCallback& error_callback) {
  65   MakeApiCall(kGetMyDevicesPath, request, callback, error_callback);
  66 }
  67
  68 void CryptAuthClient::FindEligibleUnlockDevices(
  69     const cryptauth::FindEligibleUnlockDevicesRequest& request,
  70     const FindEligibleUnlockDevicesCallback& callback,
  71     const ErrorCallback& error_callback) {
  72   MakeApiCall(kFindEligibleUnlockDevicesPath, request, callback,
  73               error_callback);
  74 }
  75
  76 void CryptAuthClient::SendDeviceSyncTickle(
  77     const cryptauth::SendDeviceSyncTickleRequest& request,
  78     const SendDeviceSyncTickleCallback& callback,
  79     const ErrorCallback& error_callback) {
  80   MakeApiCall(kSendDeviceSyncTicklePath, request, callback, error_callback);
  81 }
  82
  83 void CryptAuthClient::ToggleEasyUnlock(
  84     const cryptauth::ToggleEasyUnlockRequest& request,
  85     const ToggleEasyUnlockCallback& callback,
  86     const ErrorCallback& error_callback) {
  87   MakeApiCall(kToggleEasyUnlockPath, request, callback, error_callback);
  88 }
  89
  90 void CryptAuthClient::SetupEnrollment(
  91     const cryptauth::SetupEnrollmentRequest& request,
  92     const SetupEnrollmentCallback& callback,
  93     const ErrorCallback& error_callback) {
  94   MakeApiCall(kSetupEnrollmentPath, request, callback, error_callback);
  95 }
  96
  97 void CryptAuthClient::FinishEnrollment(
  98     const cryptauth::FinishEnrollmentRequest& request,
  99     const FinishEnrollmentCallback& callback,
 100     const ErrorCallback& error_callback) {
 101   MakeApiCall(kFinishEnrollmentPath, request, callback, error_callback);
 102 }
 103
 104 scoped_ptr<CryptAuthApiCallFlow> CryptAuthClient::CreateFlow(
 105     const GURL& request_url) {
 106   return make_scoped_ptr(new CryptAuthApiCallFlow(request_url));
 107 }
 108
 109 template <class RequestProto, class ResponseProto>
 110 void CryptAuthClient::MakeApiCall(
 111     const std::string& request_path,
 112     const RequestProto& request_proto,
 113     const base::Callback<void(const ResponseProto&)>& response_callback,
 114     const ErrorCallback& error_callback) {
 115   if (flow_) {
 116     error_callback.Run(
 117         "Client has been used for another request. Do not reuse.");
 118     return;
 119   }
 120
 121   std::string serialized_request;
 122   if (!request_proto.SerializeToString(&serialized_request)) {
 123     error_callback.Run(std::string("Failed to serialize ") +
 124                        request_proto.GetTypeName() + " proto.");
 125     return;
 126   }
 127
 128   request_path_ = request_path;
 129   error_callback_ = error_callback;
 130   access_token_fetcher_->FetchAccessToken(base::Bind(
 131       &CryptAuthClient::OnAccessTokenFetched<ResponseProto>,
 132       weak_ptr_factory_.GetWeakPtr(), serialized_request, response_callback));
 133 }
 134
 135 template <class ResponseProto>
 136 void CryptAuthClient::OnAccessTokenFetched(
 137     const std::string& serialized_request,
 138     const base::Callback<void(const ResponseProto&)>& response_callback,
 139     const std::string& access_token) {
 140   if (access_token.empty()) {
 141     OnApiCallFailed("Failed to get a valid access token.");
 142     return;
 143   }
 144
 145   flow_ = CreateFlow(CreateRequestUrl(request_path_));
 146   flow_->Start(url_request_context_.get(), access_token, serialized_request,
 147                base::Bind(&CryptAuthClient::OnFlowSuccess<ResponseProto>,
 148                           weak_ptr_factory_.GetWeakPtr(), response_callback),
 149                base::Bind(&CryptAuthClient::OnApiCallFailed,
 150                           weak_ptr_factory_.GetWeakPtr()));
 151 }
 152
 153 template <class ResponseProto>
 154 void CryptAuthClient::OnFlowSuccess(
 155     const base::Callback<void(const ResponseProto&)>& result_callback,
 156     const std::string& serialized_response) {
 157   ResponseProto response;
 158   if (!response.ParseFromString(serialized_response)) {
 159     OnApiCallFailed("Failed to parse response proto.");
 160     return;
 161   }
 162   result_callback.Run(response);
 163 };
 164
 165 void CryptAuthClient::OnApiCallFailed(const std::string& error_message) {
 166   error_callback_.Run(error_message);
 167 }
 168
 169 }  // proximity_auth