# Warden Quick Reference

Warden is WoW's client integrity checking system. Wowee implements full Warden module execution
via Unicorn Engine CPU emulation — no Wine required.

---

## How It Works

Warden modules are native x86 Windows DLLs that the server encrypts and delivers at login.

1. Server sends `SMSG_WARDEN_DATA` (0x2E6) with the encrypted module
2. Client decrypts: RC4 → RSA-2048 signature verify → zlib decompress
3. Parses the PE: relocations applied, imports resolved (Windows API hooks)
4. Executes entry point via Unicorn Engine x86 emulator
5. Client responds with check results via `CMSG_WARDEN_DATA` (0x2E7)

---

## Server Compatibility

| Server type | Expected result |
|-------------|-----------------|
| Warden disabled | Works (no Warden packets) |
| AzerothCore (local) | Works |
| ChromieCraft | Should work |
| Warmane | Should work |

---

## Module Cache

Modules are cached after first download:

```
~/.local/share/wowee/warden_cache/<MD5>.wdn
```

First connection: ~120ms (download + decompress + emulate). Subsequent: ~1-5ms (load from cache).

---

## Dependency

Unicorn Engine is required for module execution:

```bash
sudo apt install libunicorn-dev   # Ubuntu/Debian
sudo dnf install unicorn-devel    # Fedora
sudo pacman -S unicorn            # Arch
```

The client builds without Unicorn (falls back to crypto-only responses), but will not pass
strict Warden enforcement in that mode.

---

## Key Files

```
src/game/warden_module.hpp/cpp     - Module loader (8-step pipeline)
src/game/warden_emulator.hpp/cpp   - Unicorn Engine executor
src/game/warden_crypto.hpp/cpp     - RC4/MD5/SHA1/RSA crypto
src/game/game_handler.cpp          - Packet handler (handleWardenData)
```

---

## Logs

```bash
grep -i warden logs/wowee.log
```

Key messages:
- `Warden: module loaded from cache` — cached path, fast startup
- `Warden: executing module entry point` — emulation running
- `Warden: check response sent` — working correctly
- `packetsAfterGate=0` — server not responding after Warden exchange

---

## Check Types

| Opcode | Name | Response |
|--------|------|----------|
| 0x00 | Module info | `[0x00]` |
| 0x01 | Hash check | `[0x01][results]` |
| 0x02 | Lua check | `[0x02][0x00]` |
| 0x04 | Timing | `[0x04][timestamp]` |
| 0x05 | Memory scan | `[0x05][num][results]` |

---

**Last Updated**: 2026-02-17