sandboxed-api/contrib/libidn2/libidn2_sapi.h
Christian Blichmann 8d04efa62d contrib: Replace uses of CHECK_NOTNULL
Abseil's standard name for this is `ABSL_DIE_IF_NULL`.

PiperOrigin-RevId: 483648443
Change-Id: I9d6826443be72b30f71c18972436fa5f9c05048a
2022-10-25 05:50:59 -07:00

70 lines
2.3 KiB
C++

// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef CONTRIB_LIBIDN2_LIBIDN2_SAPI_H_
#define CONTRIB_LIBIDN2_LIBIDN2_SAPI_H_
#include <idn2.h>
#include <syscall.h>
#include <cstdlib>
#include "libidn2_sapi.sapi.h" // NOLINT(build/include)
#include "absl/log/die_if_null.h"
#include "sandboxed_api/util/fileops.h"
class Idn2SapiSandbox : public IDN2Sandbox {
public:
std::unique_ptr<sandbox2::Policy> ModifyPolicy(
sandbox2::PolicyBuilder*) override {
return sandbox2::PolicyBuilder()
.AllowSystemMalloc()
.AllowRead()
.AllowStat()
.AllowWrite()
.AllowExit()
.AllowGetPIDs()
.AllowSyscalls({
__NR_futex,
__NR_close,
__NR_lseek,
})
.BlockSyscallWithErrno(__NR_openat, ENOENT)
.BuildOrDie();
}
};
class IDN2Lib {
public:
explicit IDN2Lib(Idn2SapiSandbox* sandbox)
: sandbox_(ABSL_DIE_IF_NULL(sandbox)), api_(sandbox_) {}
absl::StatusOr<std::string> idn2_register_u8(const char* ulabel,
const char* alabel);
absl::StatusOr<std::string> idn2_lookup_u8(const char* data);
absl::StatusOr<std::string> idn2_to_ascii_8z(const char* ulabel);
absl::StatusOr<std::string> idn2_to_unicode_8z8z(const char* ulabel);
private:
absl::StatusOr<std::string> SapiGeneric(
const char* data,
absl::StatusOr<int> (IDN2Api::*cb)(sapi::v::Ptr* input,
sapi::v::Ptr* output, int flags));
absl::StatusOr<std::string> ProcessErrors(const absl::StatusOr<int>& status,
sapi::v::GenericPtr& ptr);
Idn2SapiSandbox* sandbox_;
IDN2Api api_;
};
#endif // CONTRIB_LIBIDN2_LIBIDN2_SAPI_H_