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_LIBZIP_SANDBOXED_H_ 16 #define CONTRIB_LIBZIP_SANDBOXED_H_ 17 18 #include <libgen.h> 19 #include <syscall.h> 20 21 #include <memory> 22 23 // Note: This header is required because to work around an issue with the 24 // libclang based header generator, which doesn't catch the types 25 // defined by zip (for example zip_uint32_t). 26 #include <zipconf.h> // NOLINT(build/include_order) 27 28 #include "sapi_zip.sapi.h" // NOLINT(build/include) 29 30 class ZipSapiSandbox : public ZipSandbox { 31 public: ModifyPolicy(sandbox2::PolicyBuilder *)32 std::unique_ptr<sandbox2::Policy> ModifyPolicy( 33 sandbox2::PolicyBuilder*) override { 34 return sandbox2::PolicyBuilder() 35 .AllowDynamicStartup() 36 .AllowRead() 37 .AllowWrite() 38 .AllowSystemMalloc() 39 .AllowGetPIDs() 40 .AllowExit() 41 .AllowSafeFcntl() 42 .AllowSyscalls({ 43 __NR_dup, 44 __NR_recvmsg, 45 __NR_ftruncate, 46 }) 47 .BlockSyscallWithErrno(__NR_openat, ENOENT) 48 .BuildOrDie(); 49 } 50 }; 51 52 #endif // CONTRIB_LIBZIP_SANDBOXED_H_ 53