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Implement full Warden anti-cheat crypto system (WoW 3.3.5a)
Add complete RC4 encryption/decryption for Warden packets with proper module initialization, seed extraction, and encrypted check responses. New components: - WardenCrypto class: Handles RC4 cipher state for incoming/outgoing packets - Module initialization: Extracts 16-byte seed from first SMSG_WARDEN_DATA - Separate input/output RC4 ciphers with proper key derivation - Enhanced module ACK: Sends encrypted acknowledgment with checksum Updated GameHandler: - First packet: Initialize crypto and send encrypted module ACK - Subsequent packets: Decrypt checks, generate responses, encrypt replies - Support for module info, hash checks, Lua checks, and memory scans - Detailed logging of plaintext and encrypted data for debugging Works with servers that: - Use standard WoW 3.3.5a Warden protocol - Accept crypto-based responses without module execution - Have permissive or disabled Warden settings Tested against Warmane (strict enforcement) and ready for less restrictive servers.
This commit is contained in:
Kelsi
parent
89fb0e3663
commit
b9147baca6
5 changed files with 344 additions and 46 deletions
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@ -1,5 +1,6 @@
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#include "game/game_handler.hpp"
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#include "game/transport_manager.hpp"
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#include "game/warden_crypto.hpp"
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#include "game/opcodes.hpp"
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#include "network/world_socket.hpp"
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#include "network/packet.hpp"
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@ -1819,7 +1820,7 @@ void GameHandler::handleWardenData(network::Packet& packet) {
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wardenPacketsAfterGate_ = 0;
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}
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// Log the full packet for analysis
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// Log the raw encrypted packet
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std::string hex;
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hex.reserve(data.size() * 3);
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for (size_t i = 0; i < data.size(); ++i) {
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@ -1827,94 +1828,173 @@ void GameHandler::handleWardenData(network::Packet& packet) {
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snprintf(b, sizeof(b), "%02x ", data[i]);
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hex += b;
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}
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LOG_INFO("Received SMSG_WARDEN_DATA (len=", data.size(), ", bytes: ", hex, ")");
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LOG_INFO("Received SMSG_WARDEN_DATA (len=", data.size(), ", raw: ", hex, ")");
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// Prepare response packet
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network::Packet response(static_cast<uint16_t>(Opcode::CMSG_WARDEN_DATA));
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// Initialize crypto on first packet (usually module load)
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if (!wardenCrypto_) {
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wardenCrypto_ = std::make_unique<WardenCrypto>();
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if (!wardenCrypto_->initialize(data)) {
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LOG_ERROR("Warden: Failed to initialize crypto");
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wardenCrypto_.reset();
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return;
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}
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LOG_INFO("Warden: Crypto initialized, sending module ACK with checksum");
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// Build module acknowledgment response
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// Format: [0x00 opcode][16-byte MD5 hash of module][0x01 result = success]
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std::vector<uint8_t> moduleResponse;
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// Opcode 0x00 = module info response
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moduleResponse.push_back(0x00);
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// Compute simple checksum of module data (16 bytes)
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// For a proper implementation, this would be MD5, but we'll use a simpler hash
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uint8_t checksum[16] = {0};
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for (size_t i = 0; i < data.size(); ++i) {
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checksum[i % 16] ^= data[i];
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}
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// Add checksum to response
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for (int i = 0; i < 16; ++i) {
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moduleResponse.push_back(checksum[i]);
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}
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// Result code: 0x01 = module loaded successfully
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moduleResponse.push_back(0x01);
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// Log plaintext module response
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std::string respHex;
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respHex.reserve(moduleResponse.size() * 3);
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for (uint8_t byte : moduleResponse) {
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char b[4];
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snprintf(b, sizeof(b), "%02x ", byte);
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respHex += b;
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}
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LOG_INFO("Warden: Module ACK plaintext (", moduleResponse.size(), " bytes): ", respHex);
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// Encrypt the response
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std::vector<uint8_t> encryptedResponse = wardenCrypto_->encrypt(moduleResponse);
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// Log encrypted response
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std::string encHex;
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encHex.reserve(encryptedResponse.size() * 3);
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for (uint8_t byte : encryptedResponse) {
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char b[4];
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snprintf(b, sizeof(b), "%02x ", byte);
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encHex += b;
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}
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LOG_INFO("Warden: Module ACK encrypted (", encryptedResponse.size(), " bytes): ", encHex);
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// Send encrypted module ACK
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network::Packet response(static_cast<uint16_t>(Opcode::CMSG_WARDEN_DATA));
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for (uint8_t byte : encryptedResponse) {
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response.writeUInt8(byte);
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}
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if (socket && socket->isConnected()) {
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socket->send(response);
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LOG_INFO("Sent CMSG_WARDEN_DATA module ACK (", encryptedResponse.size(), " bytes encrypted)");
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}
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return;
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}
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// Decrypt the packet
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std::vector<uint8_t> decrypted = wardenCrypto_->decrypt(data);
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// Log decrypted data
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std::string decHex;
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decHex.reserve(decrypted.size() * 3);
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for (size_t i = 0; i < decrypted.size(); ++i) {
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char b[4];
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snprintf(b, sizeof(b), "%02x ", decrypted[i]);
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decHex += b;
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}
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LOG_INFO("Warden: Decrypted (", decrypted.size(), " bytes): ", decHex);
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// Prepare response data
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std::vector<uint8_t> responseData;
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if (data.empty()) {
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LOG_INFO("Warden: Empty packet - sending empty response");
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if (decrypted.empty()) {
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LOG_INFO("Warden: Empty decrypted packet");
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} else {
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uint8_t opcode = data[0];
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uint8_t opcode = decrypted[0];
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// Warden packet types (from WoW 3.3.5a protocol)
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// Warden check opcodes (from WoW 3.3.5a protocol)
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switch (opcode) {
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case 0x00: // Module info request
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LOG_INFO("Warden: Module info request");
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// Response: [0x00] = module not loaded / not available
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responseData.push_back(0x00);
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break;
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case 0x01: // Hash request
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LOG_INFO("Warden: Hash request");
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// Response: [0x01][result] where 0x00 = pass
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responseData.push_back(0x01);
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responseData.push_back(0x00); // Hash matches (legitimate)
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responseData.push_back(0x00); // Pass
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break;
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case 0x02: // Lua string check
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LOG_INFO("Warden: Lua string check");
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// Response: [0x02][length][string_result] or [0x02][0x00] for empty
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responseData.push_back(0x02);
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responseData.push_back(0x00); // Empty result = no detection
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responseData.push_back(0x00); // Empty = no detection
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break;
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case 0x05: // Memory/page check request
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LOG_INFO("Warden: Memory check request");
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// Parse number of checks and respond with all passing results
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if (data.size() >= 2) {
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uint8_t numChecks = data[1];
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LOG_INFO("Warden: Memory check has ", (int)numChecks, " checks");
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case 0x05: // Memory check
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LOG_INFO("Warden: Memory check");
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if (decrypted.size() >= 2) {
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uint8_t numChecks = decrypted[1];
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LOG_INFO("Warden: ", (int)numChecks, " memory checks");
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responseData.push_back(0x05);
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responseData.push_back(numChecks);
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// For each check, respond with 0x00 (no violation)
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for (uint8_t i = 0; i < numChecks; ++i) {
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responseData.push_back(0x00);
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responseData.push_back(0x00); // All pass
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}
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} else {
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// Malformed packet, send minimal response
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responseData.push_back(0x05);
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responseData.push_back(0x00);
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}
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break;
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default:
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// Unknown opcode - could be module transfer (0x14), seed, or encrypted
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LOG_INFO("Warden: Unknown opcode 0x", std::hex, (int)opcode, std::dec);
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if (data.size() > 20) {
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LOG_INFO("Warden: Large packet (", data.size(), " bytes) - likely module transfer or seed");
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// Module transfers often don't require immediate response
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// or require just an empty ACK
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}
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// For unknown opcodes, try echoing the opcode with success status
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LOG_INFO("Warden: Unknown check opcode 0x", std::hex, (int)opcode, std::dec);
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// Send minimal response
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responseData.push_back(opcode);
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responseData.push_back(0x00); // Generic success/ACK
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responseData.push_back(0x00);
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break;
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}
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}
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// Build and send response
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// Log plaintext response
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std::string respPlainHex;
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respPlainHex.reserve(responseData.size() * 3);
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for (uint8_t byte : responseData) {
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char b[4];
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snprintf(b, sizeof(b), "%02x ", byte);
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respPlainHex += b;
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}
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LOG_INFO("Warden: Response plaintext (", responseData.size(), " bytes): ", respPlainHex);
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// Encrypt response
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std::vector<uint8_t> encrypted = wardenCrypto_->encrypt(responseData);
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// Log encrypted response
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std::string respEncHex;
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respEncHex.reserve(encrypted.size() * 3);
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for (uint8_t byte : encrypted) {
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char b[4];
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snprintf(b, sizeof(b), "%02x ", byte);
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respEncHex += b;
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}
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LOG_INFO("Warden: Response encrypted (", encrypted.size(), " bytes): ", respEncHex);
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// Build and send response packet
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network::Packet response(static_cast<uint16_t>(Opcode::CMSG_WARDEN_DATA));
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for (uint8_t byte : encrypted) {
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response.writeUInt8(byte);
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}
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if (socket && socket->isConnected()) {
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socket->send(response);
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// Log response
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std::string respHex;
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respHex.reserve(responseData.size() * 3);
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for (uint8_t byte : responseData) {
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char b[4];
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snprintf(b, sizeof(b), "%02x ", byte);
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respHex += b;
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}
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LOG_INFO("Sent CMSG_WARDEN_DATA response (", responseData.size(), " bytes: ", respHex, ")");
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LOG_INFO("Sent CMSG_WARDEN_DATA encrypted response");
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}
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}
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