1 // Copyright 2020 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // https://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef RASTER_TO_GTIFF_GDAL_SANDBOX_H_ 16 #define RASTER_TO_GTIFF_GDAL_SANDBOX_H_ 17 18 #include <syscall.h> 19 20 #include <string> 21 22 #include "gdal_sapi.sapi.h" // NOLINT(build/include) 23 24 namespace gdal::sandbox { 25 26 class GdalSapiSandbox : public GdalSandbox { 27 public: 28 GdalSapiSandbox(std::string out_directory_path, std::string proj_db_path, 29 time_t time_limit = 0) out_directory_path_(std::move (out_directory_path))30 : out_directory_path_(std::move(out_directory_path)), 31 proj_db_path_(std::move(proj_db_path)) { 32 SetWallTimeLimit(time_limit).IgnoreError(); 33 } 34 35 private: ModifyPolicy(sandbox2::PolicyBuilder *)36 std::unique_ptr<sandbox2::Policy> ModifyPolicy( 37 sandbox2::PolicyBuilder*) override { 38 return sandbox2::PolicyBuilder() 39 .AllowDynamicStartup() 40 .AllowRead() 41 .AllowSystemMalloc() 42 .AllowWrite() 43 .AllowExit() 44 .AllowOpen() 45 .AllowSyscall(__NR_futex) 46 .AllowSyscall(__NR_getdents64) // DriverRegisterAll() 47 .AllowSyscall(__NR_lseek) // GDALCreate() 48 .AllowSyscall(__NR_getpid) // GDALCreate() 49 .AllowSyscall(__NR_sysinfo) // VSI_TIFFOpen_common() 50 .AllowSyscall(__NR_prlimit64) // CPLGetUsablePhysicalRAM() 51 .AllowSyscall(__NR_ftruncate) // GTiffDataset::FillEmptyTiles() 52 .AllowUnlink() // GDALDriver::Delete() 53 .AddFile(proj_db_path_) // proj.db is required for some projections 54 .AddDirectory(out_directory_path_, /*is_ro=*/false) 55 .BuildOrDie(); 56 } 57 58 std::string out_directory_path_; 59 std::string proj_db_path_; 60 }; 61 62 } // namespace gdal::sandbox 63 64 #endif // RASTER_TO_GTIFF_GDAL_SANDBOX_H_ 65