Define FIDO U2f Device abstraction

device/u2f/u2f_device.cc

+// Copyright 2017 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 "base/bind.h"
+#include "u2f_apdu_command.h"
+#include "u2f_device.h"
+
+namespace device {
+
+U2fDevice::U2fDevice() : weak_factory_(this) {}
+
+U2fDevice::~U2fDevice() {}
+
+void U2fDevice::Register(const std::vector<uint8_t>& app_param,
+                         U2fDevice::ProtocolVersion version,
+                         const std::vector<uint8_t>& challenge_param,
+                         const MessageCallback& callback) {
+  scoped_refptr<U2fApduCommand> register_cmd =
+      U2fApduCommand::CreateRegister(app_param, challenge_param);
+  if (register_cmd == nullptr) {

[Reilly Grant (use Gerrit), 2017/02/16 02:03:15]

if (!register_cmd)

+    callback.Run(ReturnCode::INVALID_PARAMS, std::vector<uint8_t>());
+    return;
+  }
+  DeviceTransact(register_cmd,

[Reilly Grant (use Gerrit), 2017/02/16 02:03:14]

You can std::move a scoped_refptr when you don't need it anymore in this scope
and it saves an AddRef/Release. Plus then the code doesn't need to change if you
decide to use a unique_ptr instead.

+                 base::Bind(&U2fDevice::OnRegisterComplete,
+                            weak_factory_.GetWeakPtr(), callback));
+}
+
+void U2fDevice::Sign(const std::vector<uint8_t>& app_param,
+                     const std::vector<uint8_t>& challenge_param,
+                     const std::vector<uint8_t>& key_handle,
+                     const MessageCallback& callback) {
+  scoped_refptr<U2fApduCommand> sign_cmd =
+      U2fApduCommand::CreateSign(app_param, challenge_param, key_handle);
+  if (sign_cmd == nullptr) {

[Reilly Grant (use Gerrit), 2017/02/16 02:03:14]

if (!sign_cmd)

+    callback.Run(ReturnCode::INVALID_PARAMS, std::vector<uint8_t>());
+    return;
+  }
+  DeviceTransact(sign_cmd, base::Bind(&U2fDevice::OnSignComplete,
+                                      weak_factory_.GetWeakPtr(), callback));
+}
+
+void U2fDevice::Version(const VersionCallback& callback) {
+  scoped_refptr<U2fApduCommand> version_cmd = U2fApduCommand::CreateVersion();
+  if (version_cmd == nullptr) {

[Reilly Grant (use Gerrit), 2017/02/16 02:03:14]

if (!version_cmd)

+    callback.Run(false, ProtocolVersion::UNKNOWN);
+    return;
+  }
+  DeviceTransact(version_cmd, base::Bind(&U2fDevice::OnVersionComplete,
+                                         weak_factory_.GetWeakPtr(), callback));
+}
+
+// TODO

[Reilly Grant (use Gerrit), 2017/02/16 02:03:15]

Put a NOTIMPLEMENTED(); in the body instead of the TODO.

+void U2fDevice::OnRegisterComplete(
+    const MessageCallback& callback,
+    bool success,
+    scoped_refptr<U2fApduResponse> register_response) {}
+
+// TODO

[Reilly Grant (use Gerrit), 2017/02/16 02:03:14]

Put a NOTIMPLEMENTED(); in the body instead of the TODO.

+void U2fDevice::OnSignComplete(const MessageCallback& callback,
+                               bool success,
+                               scoped_refptr<U2fApduResponse> sign_response) {}
+
+void U2fDevice::OnVersionComplete(
+    const VersionCallback& callback,
+    bool success,
+    scoped_refptr<U2fApduResponse> version_response) {
+  if (success && version_response != nullptr &&

[Reilly Grant (use Gerrit), 2017/02/16 02:03:14]

&& version_response &&

+      version_response->status() == U2fApduResponse::Status::SW_NO_ERROR &&
+      version_response->data() ==
+          std::vector<uint8_t>({'U', '2', 'F', '_', 'V', '2'})) {
+    callback.Run(success, ProtocolVersion::U2F_V2);
+    return;
+  }
+  callback.Run(success, ProtocolVersion::UNKNOWN);
+}
+
+// TODO

[Reilly Grant (use Gerrit), 2017/02/16 02:03:14]

Put a NOTIMPLEMENTED(); in the body instead of the TODO.

+void U2fDevice::OnLegacyVersionComplete(
+    const VersionCallback& callback,
+    bool success,
+    scoped_refptr<U2fApduResponse> legacy_version_response) {}
+
+}  // namespace device