theo.cpp

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// Copyright (c) 2022, _xeroxz
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//
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
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#include <theo.hpp>
 
namespace theo {
theo_t::theo_t(std::vector<std::uint8_t>& lib,
               lnk_fns_t lnkr_fns,
               const std::string&& entry_sym)
    : m_dcmp(lib, &m_sym_tbl),
      m_recmp(&m_dcmp, {}, {}, {}),
      m_entry_sym(entry_sym) {
  m_recmp.allocator(std::get<0>(lnkr_fns));
  m_recmp.copier(std::get<1>(lnkr_fns));
  m_recmp.resolver(std::get<2>(lnkr_fns));
}
 
std::optional<std::uint32_t> theo_t::decompose() {
  auto res = m_dcmp.decompose(m_entry_sym);
  if (!res.has_value()) {
    spdlog::error("failed to decompose...\n");
    return {};
  }
 
  spdlog::info("decompose successful... {} symbols", res.value()->size());
  return res.value()->size();
}
 
std::uintptr_t theo_t::compose() {
  // run obfuscation engine on all symbols...
  //
  auto engine = obf::engine_t::get();
  m_sym_tbl.for_each([&](decomp::symbol_t& sym) { engine->run(&sym); });
 
  m_recmp.allocate();
  m_recmp.resolve();
  m_recmp.copy_syms();
  return m_recmp.resolve(m_entry_sym.data());
}
 
std::uintptr_t theo_t::resolve(const std::string&& sym) {
  auto val = m_sym_tbl.sym_from_hash(decomp::symbol_t::hash(sym));
  if (!val.has_value())
    return {};
 
  return val.value()->allocated_at();
}
}  // namespace theo