1da49dc9b4
Deny write access to /data/resource-cache for UIDs other than root and system. While this is already handled by SELinux rules, add an additional layer of security to explicitly prevent malicious apps from messing with the system's idmap files. Test: make idmap2_tests Change-Id: Id986633558d5d02452276f05f64337a8700f148a
46 lines
1.5 KiB
C++
46 lines
1.5 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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#ifndef IDMAP2_INCLUDE_IDMAP2_FILEUTILS_H_
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#define IDMAP2_INCLUDE_IDMAP2_FILEUTILS_H_
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#include <sys/types.h>
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#include <functional>
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#include <memory>
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#include <string>
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#include <vector>
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namespace android::idmap2::utils {
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constexpr const char* kIdmapCacheDir = "/data/resource-cache";
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constexpr const mode_t kIdmapFilePermissionMask = 0133; // u=rw,g=r,o=r
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typedef std::function<bool(unsigned char type /* DT_* from dirent.h */, const std::string& path)>
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FindFilesPredicate;
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std::unique_ptr<std::vector<std::string>> FindFiles(const std::string& root, bool recurse,
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const FindFilesPredicate& predicate);
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std::unique_ptr<std::string> ReadFile(int fd);
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std::unique_ptr<std::string> ReadFile(const std::string& path);
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bool UidHasWriteAccessToPath(uid_t uid, const std::string& path);
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} // namespace android::idmap2::utils
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#endif // IDMAP2_INCLUDE_IDMAP2_FILEUTILS_H_
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