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/>.
****************************************************************************/
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <whb/file.h>
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#include "../utils/StringTools.h"
#include "PluginMetaInformationFactory.h"
#include "PluginMetaInformation.h"
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#include "../elfio/elfio.hpp"
#include "../utils/logger.h"
using namespace ELFIO;
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std::optional<PluginMetaInformation> PluginMetaInformationFactory::loadPlugin(const PluginData &pluginData) {
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if (pluginData.buffer == nullptr) {
DEBUG_FUNCTION_LINE("Buffer was nullptr");
return std::nullopt;
}
elfio reader;
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if (!reader.load((char *) pluginData.buffer, pluginData.length)) {
DEBUG_FUNCTION_LINE("Can't process PluginData in elfio");
return std::nullopt;
}
return loadPlugin(reader);
}
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std::optional<PluginMetaInformation> PluginMetaInformationFactory::loadPlugin(std::string &filePath) {
elfio reader;
if (!reader.load(filePath)) {
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DEBUG_FUNCTION_LINE("Can't find or process ELF file");
return std::nullopt;
}
return loadPlugin(reader);
}
std::optional<PluginMetaInformation> PluginMetaInformationFactory::loadPlugin(char *buffer, size_t size) {
elfio reader;
if (!reader.load(buffer, size)) {
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DEBUG_FUNCTION_LINE("Can't find or process ELF file");
return std::nullopt;
}
return loadPlugin(reader);
}
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std::optional<PluginMetaInformation> PluginMetaInformationFactory::loadPlugin(const elfio &reader) {
size_t pluginSize = 0;
PluginMetaInformation pluginInfo;
uint32_t sec_num = reader.sections.size();
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for (uint32_t i = 0; i < sec_num; ++i) {
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();
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") {
pluginInfo.setName(value);
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} else if (key == "author") {
pluginInfo.setAuthor(value);
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} else if (key == "version") {
pluginInfo.setVersion(value);
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} else if (key == "license") {
pluginInfo.setLicense(value);
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} else if (key == "buildtimestamp") {
pluginInfo.setBuildTimestamp(value);
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} else if (key == "description") {
pluginInfo.setDescription(value);
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} else if (key == "storage_id") {
pluginInfo.setStorageId(value);
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} else if (key == "wups") {
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if (value != "0.6.1") {
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DEBUG_FUNCTION_LINE("Warning: Ignoring plugin - Unsupported WUPS version: %s.", value.c_str());
return std::nullopt;
}
}
}
curEntry += strlen(curEntry) + 1;
}
}
}
pluginInfo.setSize(pluginSize);
return pluginInfo;
}