ipc/card_emulation/hce_session_stub.cpp

/*
 * Copyright (C) 2023 Huawei Device Co., Ltd.
 * 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.
 */

#include "hce_session_stub.h"

#include "hce_cmd_death_recipient.h"
#include "ipc_skeleton.h"
#include "loghelper.h"
#include "nfc_sdk_common.h"
#include "nfc_service_ipc_interface_code.h"
#include "hce_cmd_callback_proxy.h"
#include "nfc_permission_checker.h"
#include "external_deps_proxy.h"
#include "ce_payment_services_parcelable.h"
#include "ability_info.h"
#include "accesstoken_kit.h"
#include "hap_token_info.h"

namespace OHOS {
namespace NFC {
namespace HCE {
using AppExecFwk::AbilityInfo;
int HceSessionStub::OnRemoteRequest(uint32_t code, OHOS::MessageParcel &data, OHOS::MessageParcel &reply,
                                    OHOS::MessageOption &option)
{
    DebugLog("hceSessionStub OnRemoteRequest occur, code is %d", code);
    if (data.ReadInterfaceToken() != GetDescriptor()) {
        ErrorLog("hceSessionStub OnRemoteRequest GetDescriptor failed");
        return KITS::ErrorCode::ERR_HCE_PARAMETERS;
    }

    switch (code) {
        case static_cast<uint32_t>(NfcServiceIpcInterfaceCode::COMMAND_CE_HCE_ON):
            return HandleRegHceCmdCallback(data, reply);
        case static_cast<uint32_t>(NfcServiceIpcInterfaceCode::COMMAND_CE_HCE_TRANSMIT):
            return HandleSendRawFrame(data, reply);
        case static_cast<uint32_t>(NfcServiceIpcInterfaceCode::COMMAND_CE_HCE_GET_PAYMENT_SERVICES):
            return HandleGetPaymentServices(data, reply);
        case static_cast<uint32_t>(NfcServiceIpcInterfaceCode::COMMAND_CE_HCE_STOP):
            return HandleStopHce(data, reply);
        case static_cast<uint32_t>(NfcServiceIpcInterfaceCode::COMMAND_CE_HCE_IS_DEFAULT_SERVICE):
            return HandleIsDefaultService(data, reply);
        case static_cast<uint32_t>(NfcServiceIpcInterfaceCode::COMMAND_CE_HCE_START):
            return HandleStartHce(data, reply);
        case static_cast<uint32_t>(NfcServiceIpcInterfaceCode::COMMAND_CE_HCE_OFF):
            return HandleUnRegHceCmdCallback(data, reply);
        default: return IPCObjectStub::OnRemoteRequest(code, data, reply, option);
    }
}

int HceSessionStub::HandleRegHceCmdCallback(MessageParcel &data, MessageParcel &reply)
{
    if (!ExternalDepsProxy::GetInstance().IsGranted(OHOS::NFC::CARD_EMU_PERM)) {
        ErrorLog("HandleRegHceCmdCallback, ERR_NO_PERMISSION");
        return KITS::ErrorCode::ERR_NO_PERMISSION;
    }
    std::string type = data.ReadString();
    int exception = data.ReadInt32();
    if (exception) {
        return KITS::ERR_NFC_PARAMETERS;
    }
    KITS::ErrorCode ret = KITS::ERR_NFC_PARAMETERS;
    do {
        sptr<IRemoteObject> remote = data.ReadRemoteObject();
        if (remote == nullptr) {
            DebugLog("Failed to readRemoteObject!");
            break;
        }
        std::unique_ptr<HceCmdDeathRecipient> recipient =
            std::make_unique<HceCmdDeathRecipient>(this, IPCSkeleton::GetCallingTokenID());
        sptr<IRemoteObject::DeathRecipient> dr(recipient.release());
        if ((remote->IsProxyObject()) && (!remote->AddDeathRecipient(dr))) {
            ErrorLog("Failed to add death recipient");
            return ERR_NONE;
        }
        {
            std::lock_guard<std::mutex> guard(mutex_);
            deathRecipient_ = dr;
            hceCmdCallback_ = iface_cast<KITS::IHceCmdCallback>(remote);
            if (hceCmdCallback_ == nullptr) {
                hceCmdCallback_ = new (std::nothrow) HceCmdCallbackProxy(remote);
                DebugLog("create new `HceCmdCallbackProxy`!");
            }
            ret = RegHceCmdCallback(hceCmdCallback_, type);
        }
    } while (0);
    reply.WriteInt32(ret);
    return ERR_NONE;
}

int HceSessionStub::HandleUnRegHceCmdCallback(MessageParcel &data, MessageParcel &reply)
{
    if (!ExternalDepsProxy::GetInstance().IsGranted(OHOS::NFC::CARD_EMU_PERM)) {
        ErrorLog("HandleUnRegHceCmdCallback, ERR_NO_PERMISSION");
        return KITS::ErrorCode::ERR_NO_PERMISSION;
    }
    std::string type = data.ReadString();
    int exception = data.ReadInt32();
    if (exception) {
        return KITS::ERR_NFC_PARAMETERS;
    }
    KITS::ErrorCode ret = KITS::ERR_NFC_PARAMETERS;
    do {
        sptr<IRemoteObject> remote = data.ReadRemoteObject();
        if (remote == nullptr) {
            DebugLog("Failed to readRemoteObject!");
            break;
        }
        std::lock_guard<std::mutex> guard(mutex_);
        if ((remote->IsProxyObject()) && (!remote->RemoveDeathRecipient(deathRecipient_))) {
            ErrorLog("Failed to remove death recipient");
            return ERR_NONE;
        }
        {
            ret = UnregHceCmdCallback(nullptr, type);
        }
    } while (0);
    reply.WriteInt32(ret);
    return ERR_NONE;
}

int HceSessionStub::HandleSendRawFrame(OHOS::MessageParcel &data, OHOS::MessageParcel &reply)
{
    if (!ExternalDepsProxy::GetInstance().IsGranted(OHOS::NFC::CARD_EMU_PERM)) {
        ErrorLog("HandleSendRawFrame, ERR_NO_PERMISSION");
        return KITS::ErrorCode::ERR_NO_PERMISSION;
    }

    std::string hexCmdData = data.ReadString();
    if (hexCmdData.size() > KITS::MAX_APDU_DATA_HEX_STR) {
        ErrorLog("raw frame too long");
        return KITS::ErrorCode::ERR_HCE_PARAMETERS;
    }
    bool raw = data.ReadBool();
    std::string hexRespData;
    int statusCode = SendRawFrame(hexCmdData, raw, hexRespData);
    reply.WriteString(hexRespData);
    return statusCode;
}
int HceSessionStub::HandleGetPaymentServices(MessageParcel &data, MessageParcel &reply)
{
    if (!ExternalDepsProxy::GetInstance().IsGranted(OHOS::NFC::CARD_EMU_PERM)) {
        ErrorLog("HandleGetPaymentServices, ERR_NO_PERMISSION");
        return KITS::ErrorCode::ERR_NO_PERMISSION;
    }

    if (!ExternalDepsProxy::GetInstance().IsSystemApp(IPCSkeleton::GetCallingUid())) {
        ErrorLog("HandleGetPaymentServices, ERR_NOT_SYSTEM_APP");
        return KITS::ErrorCode::ERR_NOT_SYSTEM_APP;
    }
    int exception = data.ReadInt32();
    if (exception) {
        ErrorLog("HandleGetPaymentServices, exception");
        return KITS::ERR_NFC_PARAMETERS;
    }
    std::vector<AbilityInfo> abilityInfos;
    int result = GetPaymentServices(abilityInfos);
    if (result != NFC::KITS::ErrorCode::ERR_NONE) {
        ErrorLog("HandleGetPaymentServices, get payment service failed");
        return KITS::ErrorCode::ERR_HCE_NOT_GET_PAYMENT_SERVICES;
    }
    KITS::CePaymentServicesParcelable paymentServiceMsg;
    paymentServiceMsg.paymentAbilityInfos = abilityInfos;
    if (!reply.WriteParcelable(&paymentServiceMsg)) {
        ErrorLog("HandleGetPaymentServices, write payment service failed");
        return KITS::ErrorCode::ERR_HCE_PARAMETERS;
    }
    return ERR_NONE;
}

int HceSessionStub::HandleStopHce(MessageParcel &data, MessageParcel &reply)
{
    if (!ExternalDepsProxy::GetInstance().IsGranted(OHOS::NFC::CARD_EMU_PERM)) {
        ErrorLog("HandleStopHce, ERR_NO_PERMISSION");
        return KITS::ErrorCode::ERR_NO_PERMISSION;
    }
    InfoLog("HandleStopHce");
    ElementName *element = ElementName::Unmarshalling(data);
    if (element == nullptr) {
        ErrorLog("HandleStopHce, unmarshalled element is null");
        return KITS::ERR_HCE_PARAMETERS;
    }
    int exception = data.ReadInt32();
    if (exception) {
        // element is newed by Unmarshalling, should be deleted
        delete element;
        element = nullptr;
        return KITS::ERR_HCE_PARAMETERS;
    }
    KITS::ErrorCode ret = StopHce(*(element));
    DebugLog("HandleStopHce end##ret=%{public}d\n", ret);
    reply.WriteInt32(ret);

    // element is newed by Unmarshalling, should be deleted
    delete element;
    element = nullptr;
    return ERR_NONE;
}

int HceSessionStub::HandleStartHce(MessageParcel &data, MessageParcel &reply)
{
    if (!ExternalDepsProxy::GetInstance().IsGranted(OHOS::NFC::CARD_EMU_PERM)) {
        ErrorLog("HandleStartHce, ERR_NO_PERMISSION");
        return KITS::ErrorCode::ERR_NO_PERMISSION;
    }
    InfoLog("HandleStartHce");
    std::shared_ptr<KITS::StartHceInfoParcelable> startHceInfo = std::make_shared<KITS::StartHceInfoParcelable>(data);
    if (startHceInfo == nullptr) {
        ErrorLog("HandleStartHce, unmarshalled satrtHceInfo is null");
        return KITS::ERR_HCE_PARAMETERS;
    }
    int exception = data.ReadInt32();
    if (exception) {
        ErrorLog("HandleStartHce, unmarshalled exception ");
        return KITS::ERR_HCE_PARAMETERS;
    }
    KITS::ErrorCode ret = StartHceInner(startHceInfo);
    DebugLog("HandleStartHce end##ret=%{public}d\n", ret);
    reply.WriteInt32(ret);
    return ERR_NONE;
}

KITS::ErrorCode HceSessionStub::StartHceInner(std::shared_ptr<KITS::StartHceInfoParcelable> startHceInfo)
{
    Security::AccessToken::HapTokenInfo hapTokenInfo;
    Security::AccessToken::AccessTokenID callerToken = IPCSkeleton::GetCallingTokenID();
    int result = Security::AccessToken::AccessTokenKit::GetHapTokenInfo(callerToken, hapTokenInfo);

    InfoLog("get hap token info, result = %{public}d", result);
    if (result) {
        return KITS::ERR_HCE_PARAMETERS;
    }
    if (hapTokenInfo.bundleName.empty()) {
        ErrorLog("StartHce: not got bundle name");
        return KITS::ERR_HCE_PARAMETERS;
    }
    ElementName element = startHceInfo->GetElement();
    std::vector<std::string> aids = startHceInfo->GetAids();
    if (hapTokenInfo.bundleName != element.GetBundleName()) {
        ErrorLog("StartHce: wrong bundle name");
        return KITS::ERR_HCE_PARAMETERS;
    }
    return StartHce(element, aids);
}

int HceSessionStub::HandleIsDefaultService(MessageParcel &data, MessageParcel &reply)
{
    InfoLog("HandleIsDefaultService");
    ElementName *element = ElementName::Unmarshalling(data);
    if (element == nullptr) {
        ErrorLog("HandleIsDefaultService, unmarshalled element is null");
        return KITS::ERR_HCE_PARAMETERS;
    }

    std::string type = data.ReadString();

    int exception = data.ReadInt32();
    if (exception) {
        // element is newed by Unmarshalling, should be deleted
        delete element;
        element = nullptr;
        return KITS::ERR_HCE_PARAMETERS;
    }
    bool isDefaultService = false;
    KITS::ErrorCode ret = IsDefaultService(*(element), type, isDefaultService);
    DebugLog("HandleIsDefaultService end##ret=%{public}d\n", ret);
    reply.WriteBool(isDefaultService);
    // element is newed by Unmarshalling, should be deleted
    delete element;
    element = nullptr;
    return ERR_NONE;
}
KITS::ErrorCode HceSessionStub::RegHceCmdCallback(const sptr<KITS::IHceCmdCallback> &callback,
                                                  const std::string &type)
{
    return RegHceCmdCallbackByToken(callback, type, IPCSkeleton::GetCallingTokenID());
}

KITS::ErrorCode HceSessionStub::UnregHceCmdCallback(
    const sptr<KITS::IHceCmdCallback> &callback, const std::string &type)
{
    return UnRegHceCmdCallbackByToken(type, IPCSkeleton::GetCallingTokenID());
}

int HceSessionStub::SendRawFrame(std::string hexCmdData, bool raw, std::string &hexRespData)
{
    return SendRawFrameByToken(hexCmdData, raw, hexRespData, IPCSkeleton::GetCallingTokenID());
}

KITS::ErrorCode HceSessionStub::StopHce(ElementName &element)
{
    Security::AccessToken::HapTokenInfo hapTokenInfo;
    Security::AccessToken::AccessTokenID callerToken = IPCSkeleton::GetCallingTokenID();
    int result = Security::AccessToken::AccessTokenKit::GetHapTokenInfo(callerToken, hapTokenInfo);

    InfoLog("get hap token info, result = %{public}d", result);
    if (result) {
        return KITS::ERR_HCE_PARAMETERS;
    }
    if (hapTokenInfo.bundleName.empty()) {
        ErrorLog("StopHce: not got bundle name");
        return KITS::ERR_HCE_PARAMETERS;
    }
    if (hapTokenInfo.bundleName != element.GetBundleName()) {
        ErrorLog("StopHce: wrong bundle name");
        return KITS::ERR_HCE_PARAMETERS;
    }

    return StopHce(element, IPCSkeleton::GetCallingTokenID());
}

void HceSessionStub::RemoveHceDeathRecipient(const wptr<IRemoteObject> &remote)
{
    std::lock_guard<std::mutex> guard(mutex_);
    if (hceCmdCallback_ == nullptr) {
        ErrorLog("hce OnRemoteDied callback_ is nullptr");
        return;
    }
    auto serviceRemote = hceCmdCallback_->AsObject();
    if ((serviceRemote != nullptr) && (serviceRemote == remote.promote())) {
        serviceRemote->RemoveDeathRecipient(deathRecipient_);
        hceCmdCallback_ = nullptr;
        ErrorLog("hce on remote died");
    }
}
} // namespace HCE
} // namespace NFC
} // namespace OHOS