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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef KEYSTORE_CONFIRMATION_MANAGER_H_
#define KEYSTORE_CONFIRMATION_MANAGER_H_
#include <android/hardware/confirmationui/1.0/IConfirmationUI.h>
#include <android/hardware/confirmationui/1.0/types.h>
#include <binder/Binder.h>
#include <binder/IBinder.h>
#include <binder/Status.h>
#include <keystore/keymaster_types.h>
#include <map>
#include <mutex>
#include <utils/LruCache.h>
#include <utils/StrongPointer.h>
#include <vector>
#include "confirmationui_rate_limiting.h"
namespace keystore {
using android::binder::Status;
using android::hardware::confirmationui::V1_0::IConfirmationResultCallback;
using ConfirmationResponseCode = android::hardware::confirmationui::V1_0::ResponseCode;
class ConfirmationManager;
class ConfirmationManager : public android::hardware::hidl_death_recipient,
public IConfirmationResultCallback {
public:
explicit ConfirmationManager(android::IBinder::DeathRecipient* deathRecipient);
// Calls into the confirmationui HAL to start a new prompt.
//
// Returns OperationPending if another application is already
// showing a confirmation. Otherwise returns the return code from
// the HAL.
Status presentConfirmationPrompt(const android::sp<android::IBinder>& listener,
const android::String16& promptText,
const hidl_vec<uint8_t>& extraData,
const android::String16& locale, int uiOptionsAsFlags,
int32_t* aidl_return);
// Calls into the confirmationui HAL to cancel displaying a
// prompt.
//
// Returns OperatingPending if another application is showing a
// confirmation. Otherwise returns the return code from the HAL.
Status cancelConfirmationPrompt(const android::sp<android::IBinder>& listener,
int32_t* aidl_return);
// Checks if the confirmationUI HAL is available.
Status isConfirmationPromptSupported(bool* aidl_return);
// Gets the latest confirmation token received from the ConfirmationUI HAL.
hidl_vec<uint8_t> getLatestConfirmationToken();
// Called by KeyStoreService when a client binder has died.
void binderDied(const android::wp<android::IBinder>& who);
// hidl_death_recipient overrides:
virtual void serviceDied(uint64_t cookie,
const android::wp<android::hidl::base::V1_0::IBase>& who) override;
// IConfirmationResultCallback overrides:
android::hardware::Return<void> result(ConfirmationResponseCode responseCode,
const hidl_vec<uint8_t>& dataThatWasConfirmed,
const hidl_vec<uint8_t>& confirmationToken) override;
private:
friend class ConfirmationResultCallback;
// Set rate limiting to not decrement on next abort and aborts
// confirmationui.
void cancelPrompt();
void finalizeTransaction(ConfirmationResponseCode responseCode,
hidl_vec<uint8_t> dataThatWasConfirmed);
// This mutex protects all data below it.
std::mutex mMutex;
// The mCurrentListener and mCurrentConfirmationUI fields are set
// if and only if a prompt is currently showing.
android::sp<android::IBinder> mCurrentListener;
android::sp<android::hardware::confirmationui::V1_0::IConfirmationUI> mCurrentConfirmationUI;
android::IBinder::DeathRecipient* mDeathRecipient;
hidl_vec<uint8_t> mLatestConfirmationToken;
RateLimiting<> mRateLimiting;
};
} // namespace keystore
#endif // KEYSTORE_CONFIRMATION_MANAGER_H_
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