1*ec63e07aSXin Li // Copyright 2022 Google LLC 2*ec63e07aSXin Li // 3*ec63e07aSXin Li // Licensed under the Apache License, Version 2.0 (the "License"); 4*ec63e07aSXin Li // you may not use this file except in compliance with the License. 5*ec63e07aSXin Li // You may obtain a copy of the License at 6*ec63e07aSXin Li // 7*ec63e07aSXin Li // https://www.apache.org/licenses/LICENSE-2.0 8*ec63e07aSXin Li // 9*ec63e07aSXin Li // Unless required by applicable law or agreed to in writing, software 10*ec63e07aSXin Li // distributed under the License is distributed on an "AS IS" BASIS, 11*ec63e07aSXin Li // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12*ec63e07aSXin Li // See the License for the specific language governing permissions and 13*ec63e07aSXin Li // limitations under the License. 14*ec63e07aSXin Li 15*ec63e07aSXin Li #ifndef CONTRIB_LIBIDN2_LIBIDN2_SAPI_H_ 16*ec63e07aSXin Li #define CONTRIB_LIBIDN2_LIBIDN2_SAPI_H_ 17*ec63e07aSXin Li 18*ec63e07aSXin Li #include <idn2.h> 19*ec63e07aSXin Li #include <syscall.h> 20*ec63e07aSXin Li 21*ec63e07aSXin Li #include <cstdlib> 22*ec63e07aSXin Li 23*ec63e07aSXin Li #include "libidn2_sapi.sapi.h" // NOLINT(build/include) 24*ec63e07aSXin Li #include "absl/log/die_if_null.h" 25*ec63e07aSXin Li #include "sandboxed_api/util/fileops.h" 26*ec63e07aSXin Li 27*ec63e07aSXin Li class Idn2SapiSandbox : public IDN2Sandbox { 28*ec63e07aSXin Li public: ModifyPolicy(sandbox2::PolicyBuilder *)29*ec63e07aSXin Li std::unique_ptr<sandbox2::Policy> ModifyPolicy( 30*ec63e07aSXin Li sandbox2::PolicyBuilder*) override { 31*ec63e07aSXin Li return sandbox2::PolicyBuilder() 32*ec63e07aSXin Li .AllowSystemMalloc() 33*ec63e07aSXin Li .AllowRead() 34*ec63e07aSXin Li .AllowStat() 35*ec63e07aSXin Li .AllowWrite() 36*ec63e07aSXin Li .AllowExit() 37*ec63e07aSXin Li .AllowGetPIDs() 38*ec63e07aSXin Li .AllowSyscalls({ 39*ec63e07aSXin Li __NR_futex, 40*ec63e07aSXin Li __NR_close, 41*ec63e07aSXin Li __NR_lseek, 42*ec63e07aSXin Li }) 43*ec63e07aSXin Li .BlockSyscallWithErrno(__NR_openat, ENOENT) 44*ec63e07aSXin Li .BuildOrDie(); 45*ec63e07aSXin Li } 46*ec63e07aSXin Li }; 47*ec63e07aSXin Li 48*ec63e07aSXin Li class IDN2Lib { 49*ec63e07aSXin Li public: IDN2Lib(Idn2SapiSandbox * sandbox)50*ec63e07aSXin Li explicit IDN2Lib(Idn2SapiSandbox* sandbox) 51*ec63e07aSXin Li : sandbox_(ABSL_DIE_IF_NULL(sandbox)), api_(sandbox_) {} 52*ec63e07aSXin Li absl::StatusOr<std::string> idn2_register_u8(const char* ulabel, 53*ec63e07aSXin Li const char* alabel); 54*ec63e07aSXin Li absl::StatusOr<std::string> idn2_lookup_u8(const char* data); 55*ec63e07aSXin Li absl::StatusOr<std::string> idn2_to_ascii_8z(const char* ulabel); 56*ec63e07aSXin Li absl::StatusOr<std::string> idn2_to_unicode_8z8z(const char* ulabel); 57*ec63e07aSXin Li 58*ec63e07aSXin Li private: 59*ec63e07aSXin Li absl::StatusOr<std::string> SapiGeneric( 60*ec63e07aSXin Li const char* data, 61*ec63e07aSXin Li absl::StatusOr<int> (IDN2Api::*cb)(sapi::v::Ptr* input, 62*ec63e07aSXin Li sapi::v::Ptr* output, int flags)); 63*ec63e07aSXin Li absl::StatusOr<std::string> ProcessErrors(const absl::StatusOr<int>& status, 64*ec63e07aSXin Li sapi::v::GenericPtr& ptr); 65*ec63e07aSXin Li Idn2SapiSandbox* sandbox_; 66*ec63e07aSXin Li IDN2Api api_; 67*ec63e07aSXin Li }; 68*ec63e07aSXin Li 69*ec63e07aSXin Li #endif // CONTRIB_LIBIDN2_LIBIDN2_SAPI_H_ 70