122 lines
4.1 KiB
C++
122 lines
4.1 KiB
C++
/*
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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 <sys/stat.h> // umask
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#include <sys/types.h> // umask
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#include <fstream>
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#include <memory>
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#include <ostream>
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#include <sstream>
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#include <string>
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#include <vector>
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#include "idmap2/BinaryStreamVisitor.h"
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#include "idmap2/CommandLineOptions.h"
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#include "idmap2/FileUtils.h"
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#include "idmap2/Idmap.h"
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#include "idmap2/Policies.h"
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#include "idmap2/SysTrace.h"
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using android::ApkAssets;
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using android::idmap2::BinaryStreamVisitor;
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using android::idmap2::CommandLineOptions;
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using android::idmap2::Error;
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using android::idmap2::Idmap;
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using android::idmap2::PoliciesToBitmask;
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using android::idmap2::PolicyBitmask;
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using android::idmap2::PolicyFlags;
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using android::idmap2::Result;
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using android::idmap2::Unit;
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using android::idmap2::utils::kIdmapFilePermissionMask;
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using android::idmap2::utils::UidHasWriteAccessToPath;
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Result<Unit> Create(const std::vector<std::string>& args) {
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SYSTRACE << "Create " << args;
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std::string target_apk_path;
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std::string overlay_apk_path;
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std::string idmap_path;
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std::vector<std::string> policies;
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bool ignore_overlayable;
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const CommandLineOptions opts =
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CommandLineOptions("idmap2 create")
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.MandatoryOption("--target-apk-path",
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"input: path to apk which will have its resources overlaid",
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&target_apk_path)
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.MandatoryOption("--overlay-apk-path",
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"input: path to apk which contains the new resource values",
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&overlay_apk_path)
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.MandatoryOption("--idmap-path", "output: path to where to write idmap file", &idmap_path)
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.OptionalOption("--policy",
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"input: an overlayable policy this overlay fulfills "
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"(if none or supplied, the overlay policy will default to \"public\")",
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&policies)
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.OptionalFlag("--ignore-overlayable", "disables overlayable and policy checks",
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&ignore_overlayable);
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const auto opts_ok = opts.Parse(args);
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if (!opts_ok) {
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return opts_ok.GetError();
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}
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const uid_t uid = getuid();
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if (!UidHasWriteAccessToPath(uid, idmap_path)) {
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return Error("uid %d does not have write access to %s", uid, idmap_path.c_str());
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}
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PolicyBitmask fulfilled_policies = 0;
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auto conv_result = PoliciesToBitmask(policies);
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if (conv_result) {
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fulfilled_policies |= *conv_result;
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} else {
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return conv_result.GetError();
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}
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if (fulfilled_policies == 0) {
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fulfilled_policies |= PolicyFlags::POLICY_PUBLIC;
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}
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const std::unique_ptr<const ApkAssets> target_apk = ApkAssets::Load(target_apk_path);
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if (!target_apk) {
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return Error("failed to load apk %s", target_apk_path.c_str());
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}
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const std::unique_ptr<const ApkAssets> overlay_apk = ApkAssets::Load(overlay_apk_path);
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if (!overlay_apk) {
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return Error("failed to load apk %s", overlay_apk_path.c_str());
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}
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const auto idmap = Idmap::FromApkAssets(target_apk_path, *target_apk, overlay_apk_path,
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*overlay_apk, fulfilled_policies, !ignore_overlayable);
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if (!idmap) {
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return Error(idmap.GetError(), "failed to create idmap");
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}
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umask(kIdmapFilePermissionMask);
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std::ofstream fout(idmap_path);
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if (fout.fail()) {
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return Error("failed to open idmap path %s", idmap_path.c_str());
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}
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BinaryStreamVisitor visitor(fout);
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(*idmap)->accept(&visitor);
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fout.close();
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if (fout.fail()) {
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return Error("failed to write to idmap path %s", idmap_path.c_str());
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}
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return Unit{};
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}
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