1 // Copyright 2022 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_HUNSPELL_SANDBOXED_H_ 16 #define CONTRIB_HUNSPELL_SANDBOXED_H_ 17 18 #include <libgen.h> 19 #include <syscall.h> 20 21 #include "sapi_hunspell.sapi.h" // NOLINT(build/include) 22 23 class HunspellSapiSandbox : public HunspellSandbox { 24 public: HunspellSapiSandbox(std::string affix_file_name,std::string dictionary_file_name)25 explicit HunspellSapiSandbox(std::string affix_file_name, 26 std::string dictionary_file_name) 27 : affix_file_name_(std::move(affix_file_name)), 28 dictionary_file_name_(std::move(dictionary_file_name)) {} 29 30 private: ModifyPolicy(sandbox2::PolicyBuilder *)31 std::unique_ptr<sandbox2::Policy> ModifyPolicy( 32 sandbox2::PolicyBuilder*) override { 33 return sandbox2::PolicyBuilder() 34 .AllowStaticStartup() 35 .AllowOpen() 36 .AllowRead() 37 .AllowWrite() 38 .AllowGetPIDs() 39 .AllowSystemMalloc() 40 .AllowExit() 41 .AllowSyscalls({ 42 __NR_clock_gettime, 43 __NR_close, 44 }) 45 .AddFile(affix_file_name_, /*is_ro=*/true) 46 .AddFile(dictionary_file_name_, /*is_ro=*/true) 47 .AllowRestartableSequencesWithProcFiles( 48 sandbox2::PolicyBuilder::kAllowSlowFences) // hangs without it 49 .BuildOrDie(); 50 } 51 52 std::string affix_file_name_; 53 std::string dictionary_file_name_; 54 }; 55 56 #endif // CONTRIB_HUNSPELL_SANDBOXED_H_ 57