WiiUPluginLoaderBackend/source/plugin/PluginMetaInformationFactory.cpp

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/****************************************************************************
* Copyright (C) 2018-2020 Maschell
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
****************************************************************************/
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#include "PluginMetaInformationFactory.h"
#include "elfio/elfio.hpp"
#include "fs/FSUtils.h"
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#include <memory>
std::optional<std::unique_ptr<PluginMetaInformation>> PluginMetaInformationFactory::loadPlugin(const std::shared_ptr<PluginData> &pluginData) {
if (!pluginData->buffer) {
DEBUG_FUNCTION_LINE_ERR("Buffer is empty");
return {};
}
ELFIO::elfio reader;
if (!reader.load((char *) pluginData->buffer.get(), pluginData->length)) {
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DEBUG_FUNCTION_LINE_ERR("Can't process PluginData in elfio");
return {};
}
return loadPlugin(reader);
}
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std::optional<std::unique_ptr<PluginMetaInformation>> PluginMetaInformationFactory::loadPlugin(const std::string &filePath) {
ELFIO::elfio reader;
uint8_t *buffer = nullptr;
uint32_t length = 0;
if (FSUtils::LoadFileToMem(filePath.c_str(), &buffer, &length) < 0) {
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DEBUG_FUNCTION_LINE_ERR("Failed to load file to memory");
return {};
}
if (!reader.load((char *) buffer, length)) {
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DEBUG_FUNCTION_LINE_ERR("Can't process PluginData in elfio");
return {};
}
auto res = loadPlugin(reader);
free(buffer);
return res;
}
std::optional<std::unique_ptr<PluginMetaInformation>> PluginMetaInformationFactory::loadPlugin(char *buffer, size_t size) {
ELFIO::elfio reader;
if (!reader.load(buffer, size)) {
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DEBUG_FUNCTION_LINE_ERR("Can't find or process ELF file");
return std::nullopt;
}
return loadPlugin(reader);
}
std::optional<std::unique_ptr<PluginMetaInformation>> PluginMetaInformationFactory::loadPlugin(const ELFIO::elfio &reader) {
size_t pluginSize = 0;
auto pluginInfo = std::unique_ptr<PluginMetaInformation>(new PluginMetaInformation);
uint32_t sec_num = reader.sections.size();
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for (uint32_t i = 0; i < sec_num; ++i) {
ELFIO::section *psec = reader.sections[i];
// Calculate total size:
if ((psec->get_type() == SHT_PROGBITS || psec->get_type() == SHT_NOBITS) && (psec->get_flags() & SHF_ALLOC)) {
uint32_t sectionSize = psec->get_size();
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auto address = (uint32_t) psec->get_address();
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if ((address >= 0x02000000) && address < 0x10000000) {
pluginSize += sectionSize;
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} else if ((address >= 0x10000000) && address < 0xC0000000) {
pluginSize += sectionSize;
}
}
// Get meta information and check WUPS version:
if (psec->get_name() == ".wups.meta") {
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const void *sectionData = psec->get_data();
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uint32_t sectionSize = psec->get_size();
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char *curEntry = (char *) sectionData;
while ((uint32_t) curEntry < (uint32_t) sectionData + sectionSize) {
if (*curEntry == '\0') {
curEntry++;
continue;
}
auto firstFound = std::string(curEntry).find_first_of('=');
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if (firstFound != std::string::npos) {
curEntry[firstFound] = '\0';
std::string key(curEntry);
std::string value(curEntry + firstFound + 1);
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if (key == "name") {
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pluginInfo->setName(value);
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} else if (key == "author") {
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pluginInfo->setAuthor(value);
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} else if (key == "version") {
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pluginInfo->setVersion(value);
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} else if (key == "license") {
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pluginInfo->setLicense(value);
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} else if (key == "buildtimestamp") {
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pluginInfo->setBuildTimestamp(value);
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} else if (key == "description") {
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pluginInfo->setDescription(value);
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} else if (key == "storage_id") {
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pluginInfo->setStorageId(value);
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} else if (key == "wups") {
if (value != "0.7.1") {
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DEBUG_FUNCTION_LINE_ERR("Warning: Ignoring plugin - Unsupported WUPS version: %s.", value.c_str());
return std::nullopt;
}
}
}
curEntry += strlen(curEntry) + 1;
}
}
}
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pluginInfo->setSize(pluginSize);
return pluginInfo;
}