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/*
* Copyright (C) 2020 The Android Open Source Project
*
* 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
*
* http://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.
*/
#include "sdk_checker.h"
#include "art_method-inl.h"
#include "base/utils.h"
#include "dex/art_dex_file_loader.h"
#include "mirror/class-inl.h"
namespace art {
SdkChecker::SdkChecker() : enabled_(true) {}
SdkChecker* SdkChecker::Create(
const std::string& public_sdk, std::string* error_msg) {
std::vector<std::string> dex_file_paths;
Split(public_sdk, ':', &dex_file_paths);
ArtDexFileLoader dex_loader;
std::unique_ptr<SdkChecker> sdk_checker(new SdkChecker());
for (const std::string& path : dex_file_paths) {
if (!dex_loader.Open(path.c_str(),
path,
/*verify=*/ true,
/*verify_checksum*/ false,
error_msg,
&sdk_checker->sdk_dex_files_)) {
return nullptr;
}
}
return sdk_checker.release();
}
bool SdkChecker::ShouldDenyAccess(ArtMethod* art_method) const {
if (!enabled_) {
return false;
}
bool found = false;
for (const std::unique_ptr<const DexFile>& dex_file : sdk_dex_files_) {
const dex::TypeId* declaring_type_id =
dex_file->FindTypeId(art_method->GetDeclaringClassDescriptor());
if (declaring_type_id == nullptr) {
continue;
}
const dex::StringId* name_id = dex_file->FindStringId(art_method->GetName());
if (name_id == nullptr) {
continue;
}
dex::TypeIndex return_type_idx;
std::vector<dex::TypeIndex> param_type_idxs;
if (!dex_file->CreateTypeList(
art_method->GetSignature().ToString().c_str(),
&return_type_idx,
¶m_type_idxs)) {
continue;
}
const dex::ProtoId* proto_id = dex_file->FindProtoId(return_type_idx, param_type_idxs);
if (proto_id == nullptr) {
continue;
}
const dex::MethodId* method_id =
dex_file->FindMethodId(*declaring_type_id, *name_id, *proto_id);
if (method_id != nullptr) {
found = true;
break;
}
}
if (!found) {
VLOG(verifier) << "Deny for " << art_method->PrettyMethod(true);
}
// Deny access if we didn't find the descriptor in the public api dex files.
return !found;
}
bool SdkChecker::ShouldDenyAccess(ArtField* art_field) const {
if (!enabled_) {
return false;
}
bool found = false;
for (const std::unique_ptr<const DexFile>& dex_file : sdk_dex_files_) {
std::string declaring_class;
const dex::TypeId* declaring_type_id = dex_file->FindTypeId(
art_field->GetDeclaringClass()->GetDescriptor(&declaring_class));
if (declaring_type_id == nullptr) {
continue;
}
const dex::StringId* name_id = dex_file->FindStringId(art_field->GetName());
if (name_id == nullptr) {
continue;
}
const dex::TypeId* type_id = dex_file->FindTypeId(art_field->GetTypeDescriptor());
if (type_id == nullptr) {
continue;
}
const dex::FieldId* field_id = dex_file->FindFieldId(*declaring_type_id, *name_id, *type_id);
if (field_id != nullptr) {
found = true;
break;
}
}
if (!found) {
VLOG(verifier) << "Deny for " << ArtField::PrettyField(art_field, true);
}
// Deny access if we didn't find the descriptor in the public api dex files.
return !found;
}
bool SdkChecker::ShouldDenyAccess(const char* descriptor) const {
if (!enabled_) {
return false;
}
bool found = false;
for (const std::unique_ptr<const DexFile>& dex_file : sdk_dex_files_) {
const dex::TypeId* type_id = dex_file->FindTypeId(descriptor);
if (type_id != nullptr) {
dex::TypeIndex type_idx = dex_file->GetIndexForTypeId(*type_id);
if (dex_file->FindClassDef(type_idx) != nullptr) {
found = true;
break;
}
}
}
if (!found) {
VLOG(verifier) << "Deny for " << descriptor;
}
// Deny access if we didn't find the descriptor in the public api dex files.
return !found;
}
} // namespace art
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