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/*
* Copyright (C) 2017 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.
*/
#define ATRACE_TAG ATRACE_TAG_RESOURCES
#include "android-base/macros.h"
#include "android-base/stringprintf.h"
#include "android-base/unique_fd.h"
#include "androidfw/ApkAssets.h"
#include "utils/misc.h"
#include "utils/Trace.h"
#include "core_jni_helpers.h"
#include "jni.h"
#include "nativehelper/ScopedUtfChars.h"
using ::android::base::unique_fd;
namespace android {
static jlong NativeLoad(JNIEnv* env, jclass /*clazz*/, jstring java_path, jboolean system,
jboolean force_shared_lib, jboolean overlay) {
ScopedUtfChars path(env, java_path);
if (path.c_str() == nullptr) {
return 0;
}
ATRACE_NAME(base::StringPrintf("LoadApkAssets(%s)", path.c_str()).c_str());
std::unique_ptr<const ApkAssets> apk_assets;
if (overlay) {
apk_assets = ApkAssets::LoadOverlay(path.c_str(), system);
} else if (force_shared_lib) {
apk_assets = ApkAssets::LoadAsSharedLibrary(path.c_str(), system);
} else {
apk_assets = ApkAssets::Load(path.c_str(), system);
}
if (apk_assets == nullptr) {
std::string error_msg = base::StringPrintf("Failed to load asset path %s", path.c_str());
jniThrowException(env, "java/io/IOException", error_msg.c_str());
return 0;
}
return reinterpret_cast<jlong>(apk_assets.release());
}
static jlong NativeLoadFromFd(JNIEnv* env, jclass /*clazz*/, jobject file_descriptor,
jstring friendly_name, jboolean system, jboolean force_shared_lib) {
ScopedUtfChars friendly_name_utf8(env, friendly_name);
if (friendly_name_utf8.c_str() == nullptr) {
return 0;
}
ATRACE_NAME(base::StringPrintf("LoadApkAssetsFd(%s)", friendly_name_utf8.c_str()).c_str());
int fd = jniGetFDFromFileDescriptor(env, file_descriptor);
if (fd < 0) {
jniThrowException(env, "java/lang/IllegalArgumentException", "Bad FileDescriptor");
return 0;
}
unique_fd dup_fd(::fcntl(fd, F_DUPFD_CLOEXEC, 0));
if (dup_fd < 0) {
jniThrowIOException(env, errno);
return 0;
}
std::unique_ptr<const ApkAssets> apk_assets = ApkAssets::LoadFromFd(std::move(dup_fd),
friendly_name_utf8.c_str(),
system, force_shared_lib);
if (apk_assets == nullptr) {
std::string error_msg = base::StringPrintf("Failed to load asset path %s from fd %d",
friendly_name_utf8.c_str(), dup_fd.get());
jniThrowException(env, "java/io/IOException", error_msg.c_str());
return 0;
}
return reinterpret_cast<jlong>(apk_assets.release());
}
static void NativeDestroy(JNIEnv* /*env*/, jclass /*clazz*/, jlong ptr) {
delete reinterpret_cast<ApkAssets*>(ptr);
}
static jstring NativeGetAssetPath(JNIEnv* env, jclass /*clazz*/, jlong ptr) {
const ApkAssets* apk_assets = reinterpret_cast<const ApkAssets*>(ptr);
return env->NewStringUTF(apk_assets->GetPath().c_str());
}
static jlong NativeGetStringBlock(JNIEnv* /*env*/, jclass /*clazz*/, jlong ptr) {
const ApkAssets* apk_assets = reinterpret_cast<const ApkAssets*>(ptr);
return reinterpret_cast<jlong>(apk_assets->GetLoadedArsc()->GetStringPool());
}
static jboolean NativeIsUpToDate(JNIEnv* /*env*/, jclass /*clazz*/, jlong ptr) {
const ApkAssets* apk_assets = reinterpret_cast<const ApkAssets*>(ptr);
return apk_assets->IsUpToDate() ? JNI_TRUE : JNI_FALSE;
}
static jlong NativeOpenXml(JNIEnv* env, jclass /*clazz*/, jlong ptr, jstring file_name) {
ScopedUtfChars path_utf8(env, file_name);
if (path_utf8.c_str() == nullptr) {
return 0;
}
const ApkAssets* apk_assets = reinterpret_cast<const ApkAssets*>(ptr);
std::unique_ptr<Asset> asset = apk_assets->Open(path_utf8.c_str(),
Asset::AccessMode::ACCESS_RANDOM);
if (asset == nullptr) {
jniThrowException(env, "java/io/FileNotFoundException", path_utf8.c_str());
return 0;
}
// DynamicRefTable is only needed when looking up resource references. Opening an XML file
// directly from an ApkAssets has no notion of proper resource references.
std::unique_ptr<ResXMLTree> xml_tree = util::make_unique<ResXMLTree>(nullptr /*dynamicRefTable*/);
status_t err = xml_tree->setTo(asset->getBuffer(true), asset->getLength(), true);
asset.reset();
if (err != NO_ERROR) {
jniThrowException(env, "java/io/FileNotFoundException", "Corrupt XML binary file");
return 0;
}
return reinterpret_cast<jlong>(xml_tree.release());
}
// JNI registration.
static const JNINativeMethod gApkAssetsMethods[] = {
{"nativeLoad", "(Ljava/lang/String;ZZZ)J", (void*)NativeLoad},
{"nativeLoadFromFd", "(Ljava/io/FileDescriptor;Ljava/lang/String;ZZ)J",
(void*)NativeLoadFromFd},
{"nativeDestroy", "(J)V", (void*)NativeDestroy},
{"nativeGetAssetPath", "(J)Ljava/lang/String;", (void*)NativeGetAssetPath},
{"nativeGetStringBlock", "(J)J", (void*)NativeGetStringBlock},
{"nativeIsUpToDate", "(J)Z", (void*)NativeIsUpToDate},
{"nativeOpenXml", "(JLjava/lang/String;)J", (void*)NativeOpenXml},
};
int register_android_content_res_ApkAssets(JNIEnv* env) {
return RegisterMethodsOrDie(env, "android/content/res/ApkAssets", gApkAssetsMethods,
arraysize(gApkAssetsMethods));
}
} // namespace android
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