patch_list.cpp

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#include "patch_list.h"
 
#include <iostream>
#include <sstream>
 
#include "../utils/format_util.h"
 
std::string  pesieve::PatchList::Patch::getFormattedName()
{
    std::stringstream stream;
 
    if (this->hooked_func.length() > 0) {
        stream << hooked_func;
    } else {
        switch (this->type) {
        case pesieve::HOOK_INLINE:
            stream << "hook_"; break;
        case pesieve::HOOK_ADDR_REPLACEMENT:
            stream << "addr_replaced_"; break;
        default:
            stream << "patch_"; break;
        }
        stream << id;
    }
    if (this->type != pesieve::HOOK_NONE) {
        stream << "->";
        if (this->isDirect) {
            stream << std::hex << hookTargetVA;
        }
        else {
            stream << "via:" << std::hex << hookTargetVA;
        }
    }
    if (this->hookTargetModule) {
        ULONGLONG diff = hookTargetVA - hookTargetModule;
        stream << "[";
        stream << std::hex << hookTargetModule;
        stream << "+" << diff << ":";
        if (hookTargetModName.length() > 0) {
            stream << hookTargetModName;
        }
        else {
            stream << "(unnamed)";
        }
        stream << ":" << isTargetSuspicious;
        stream << "]";
    }
    return stream.str();
}
 
const bool pesieve::PatchList::Patch::toTAG(std::ofstream &patch_report, const char delimiter)
{
    if (patch_report.is_open()) {
        patch_report << std::hex << startRva;
        patch_report << delimiter;
        patch_report << getFormattedName();
        patch_report << delimiter;
        patch_report << (endRva - startRva);
 
        patch_report << std::endl;
    } else {
        std::cout << std::hex << startRva << std::endl;
    }
    return true;
}
 
const bool pesieve::PatchList::Patch::toJSON(std::stringstream &outs, size_t level, bool short_info)
{
    OUT_PADDED(outs, level, "{\n");
 
    OUT_PADDED(outs, (level + 1), "\"rva\" : ");
    outs << "\"" << std::hex << (ULONGLONG)startRva << "\"" << ",\n";
 
    OUT_PADDED(outs, (level + 1), "\"size\" : ");
    outs << std::dec << (ULONGLONG)(endRva - startRva);
 
    if (short_info) {
        outs << ",\n";
        OUT_PADDED(outs, (level + 1), "\"info\" : ");
        outs << "\"" << getFormattedName() << "\"";
    }
    else {
        outs << ",\n";
        const bool isHook = (this->type != pesieve::HOOK_NONE);
        OUT_PADDED(outs, (level + 1), "\"is_hook\" : ");
        outs << std::dec << isHook;
 
        if (this->hooked_func.length() > 0) {
            outs << ",\n";
            OUT_PADDED(outs, (level + 1), "\"func_name\" : ");
            outs << "\"" << hooked_func << "\"";
        }
        if (isHook) {
            outs << ",\n";
            OUT_PADDED(outs, (level + 1), "\"hook_target\" : {\n");
            if (hookTargetModName.length() > 0) {
                OUT_PADDED(outs, (level + 2), "\"module_name\" : ");
                outs << "\"" << hookTargetModName << "\"" << ",\n";
            }
            OUT_PADDED(outs, (level + 2), "\"module\" : ");
            outs << "\"" << std::hex << (ULONGLONG)hookTargetModule << "\"" << ",\n";
            OUT_PADDED(outs, (level + 2), "\"rva\" : ");
            outs << "\"" << std::hex << (ULONGLONG)(hookTargetVA - hookTargetModule) << "\"" << ",\n";
            OUT_PADDED(outs, (level + 2), "\"status\" : ");
            outs << std::dec << (ULONGLONG)this->isTargetSuspicious << "\n";
            OUT_PADDED(outs, (level + 1), "}");
        }
    }
 
    outs << "\n";
    OUT_PADDED(outs, level, "}");
    return true;
}
 
bool  pesieve::PatchList::Patch::resolveHookedExport(peconv::ExportsMapper &expMap)
{
    ULONGLONG patch_va = (ULONGLONG) this->moduleBase + this->startRva;
    const peconv::ExportedFunc *func = expMap.find_export_by_va(patch_va);
    if (func == nullptr) {
        return false; // not found
    }
    this->hooked_func = func->nameToString();
    return true;
}
 
const size_t pesieve::PatchList::toTAGs(std::ofstream &patch_report, const char delimiter)
{
    std::vector<Patch*>::iterator itr;
    for (itr = patches.begin(); itr != patches.end(); ++itr) {
        Patch *patch = *itr;
        patch->toTAG(patch_report, delimiter);
    }
    return patches.size();
}
 
const bool pesieve::PatchList::toJSON(std::stringstream &outs, size_t level, bool short_info)
{
    if (patches.size() == 0) {
        return false;
    }
    bool is_first = true;
    OUT_PADDED(outs, level, "\"patches_list\" : [\n");
    std::vector<Patch*>::iterator itr;
    size_t id = 0;
    for (itr = patches.begin(); itr != patches.end(); ++itr, ++id) {
        if (!is_first) {
            outs << ",\n";
        }
        Patch *patch = *itr;
        patch->toJSON(outs, level + 1, short_info);
        is_first = false;
    }
    outs << "\n";
    OUT_PADDED(outs, level, "]");
    return true;
}
 
size_t  pesieve::PatchList::checkForHookedExports(peconv::ExportsMapper &expMap)
{
    size_t hookes_exports = 0;
    std::vector<Patch*>::iterator itr;
    for (itr = patches.begin(); itr != patches.end(); ++itr) {
        Patch *patch = *itr;
        if (patch->resolveHookedExport(expMap)) {
            hookes_exports++;
        }
    }
    return hookes_exports;
}
 
void  pesieve::PatchList::deletePatches()
{
    std::vector<Patch*>::iterator itr;
    for (itr = patches.begin(); itr != patches.end(); ++itr) {
        Patch *patch = *itr;
        delete patch;
    }
    this->patches.clear();
}