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 CONTRIB_LODEPNG_EXAMPLES_SANDBOX_H_ 16 #define CONTRIB_LODEPNG_EXAMPLES_SANDBOX_H_ 17 18 #include <syscall.h> 19 20 #include "lodepng_sapi.sapi.h" // NOLINT(build/include) 21 22 class SapiLodepngSandbox : public LodepngSandbox { 23 public: SapiLodepngSandbox(const std::string & images_path)24 explicit SapiLodepngSandbox(const std::string& images_path) 25 : images_path_(images_path) {} 26 27 private: ModifyPolicy(sandbox2::PolicyBuilder *)28 std::unique_ptr<sandbox2::Policy> ModifyPolicy( 29 sandbox2::PolicyBuilder*) override { 30 return sandbox2::PolicyBuilder() 31 .AllowRead() 32 .AllowWrite() 33 .AllowOpen() 34 .AllowSystemMalloc() 35 .AllowExit() 36 .AllowStat() 37 .AllowGetPIDs() 38 .AddDirectoryAt(images_path_, "/output/", /*is_ro=*/false) 39 .AllowSyscalls({ 40 __NR_futex, 41 __NR_lseek, 42 __NR_close, 43 }) 44 .BuildOrDie(); 45 } 46 47 const std::string images_path_; 48 }; 49 50 #endif // CONTRIB_LODEPNG_EXAMPLES_SANDBOX__ 51