/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <string.h>
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#include <string>
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#include <string_view>
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#include <vector>
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#include <android-base/endian.h>
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#include <android-base/logging.h>
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#include <app_nugget.h>
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#include <bootloader_message/bootloader_message.h>
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#include <nos/NuggetClient.h>
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#include <nos/debug.h>
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#include <recovery_ui/device.h>
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#include <recovery_ui/screen_ui.h>
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namespace android {
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namespace device {
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namespace google {
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namespace crosshatch {
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namespace {
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/** Wipe user data from Titan M. */
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bool WipeTitanM() {
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// Connect to Titan M
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::nos::NuggetClient client;
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client.Open();
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if (!client.IsOpen()) {
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LOG(ERROR) << "Failed to connect to Titan M";
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return false;
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}
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// Tell it to wipe user data
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const uint32_t magicValue = htole32(ERASE_CONFIRMATION);
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std::vector<uint8_t> magic(sizeof(magicValue));
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memcpy(magic.data(), &magicValue, sizeof(magicValue));
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const uint32_t status
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= client.CallApp(APP_ID_NUGGET, NUGGET_PARAM_NUKE_FROM_ORBIT, magic, nullptr);
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if (status != APP_SUCCESS) {
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LOG(ERROR) << "Titan M user data wipe failed: " << ::nos::StatusCodeString(status)
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<< " (" << status << ")";
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return false;
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}
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LOG(INFO) << "Titan M wipe successful";
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return true;
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}
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// Wipes the provisioned flag as part of data wipe.
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bool WipeProvisionedFlag() {
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// Must be consistent with the one in init.hardware.rc (10-byte `theme-dark`).
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const std::string wipe_str(10, '\x00');
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constexpr size_t kProvisionedFlagOffsetInVendorSpace = 0;
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if (std::string err; !WriteMiscPartitionVendorSpace(
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wipe_str.data(), wipe_str.size(), kProvisionedFlagOffsetInVendorSpace, &err)) {
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LOG(ERROR) << "Failed to write wipe string: " << err;
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return false;
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}
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LOG(INFO) << "Provisioned flag wiped successful";
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return true;
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}
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} // namespace
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class CrosshatchDevice : public ::Device
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{
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public:
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CrosshatchDevice(::ScreenRecoveryUI* const ui) : ::Device(ui) {}
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/** Hook to wipe user data not stored in /data */
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bool PostWipeData() override {
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// Try to do everything but report a failure if anything wasn't successful
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bool totalSuccess = true;
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::RecoveryUI* const ui = GetUI();
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ui->Print("Wiping Titan M...\n");
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if (!WipeTitanM()) {
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totalSuccess = false;
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}
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if (!WipeProvisionedFlag()) {
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totalSuccess = false;
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}
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// Extendable to wipe other components
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return totalSuccess;
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}
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};
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} // namespace crosshatch
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} // namespace google
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} // namespace device
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} // namespace android
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Device *make_device()
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{
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return new ::android::device::google::crosshatch::CrosshatchDevice(new ::ScreenRecoveryUI);
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}
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