#!/bin/bash
# ==========================================================
# 脚本名称: agent_daemon.sh
# 核心功能: TLS 隧道构建、HMAC 动态鉴权、防重放攻击、模块级零信任路由
# ==========================================================
INSTALL_DIR="/opt/ip_sentinel"
CONFIG_FILE="${INSTALL_DIR}/config.conf"
IP_CACHE="${INSTALL_DIR}/core/.last_ip"
[ ! -f "$CONFIG_FILE" ] && exit 1
source "$CONFIG_FILE"
# [战术核心] 若未配置司令部凭证，则判定为单机运行模式，主动进入休眠
[ -z "$TG_TOKEN" ] || [ -z "$CHAT_ID" ] && exit 0
AGENT_PORT=${AGENT_PORT:-9527}
# ----------------------------------------------------------
# [身份锚定] 载入不可变主键与展示别名 (双轨身份映射)
# ----------------------------------------------------------
if [ -z "$NODE_NAME" ]; then
IP_HASH=$(echo "${PUBLIC_IP:-127.0.0.1}" | md5sum | cut -c 1-4 | tr 'a-z' 'A-Z')
NODE_NAME="$(hostname | tr -cd 'a-zA-Z0-9' | cut -c 1-10)-${IP_HASH}"
fi
NODE_ALIAS="${NODE_ALIAS:-$NODE_NAME}"
# ----------------------------------------------------------
# [网络侦测] 实时公网 IP 嗅探与静默状态更新
# ----------------------------------------------------------
RAW_IP=$(curl -${IP_PREF:-4} -s -m 5 api.ip.sb/ip | tr -d '[:space:]')
# [防线/容灾] 为 IPv6 自动装载方括号护甲；API 失效时退回静态配置锚点
if [ -n "$RAW_IP" ]; then
if [[ "$RAW_IP" == *":"* ]] && [[ "$RAW_IP" != *"["* ]]; then
AGENT_IP="[${RAW_IP}]"
else
AGENT_IP="$RAW_IP"
fi
else
AGENT_IP="${PUBLIC_IP:-${BIND_IP:-Unknown}}"
fi
if [ -n "$AGENT_IP" ]; then
LAST_IP=""
[ -f "$IP_CACHE" ] && LAST_IP=$(cat "$IP_CACHE" | tr -d '[:space:]')
if [ "$AGENT_IP" != "$LAST_IP" ]; then
# [底层交互] 仅执行本地缓存重写，切除高频发信逻辑，保持静默侦听
echo "$AGENT_IP" > "$IP_CACHE"
echo "ℹ️ [Agent] 发现本地 IP 变动，已静默更新缓存: $AGENT_IP"
else
echo "ℹ️ [Agent] IP 未变动 ($AGENT_IP)，继续后台静默监听。"
fi
fi
# ==========================================================
# [加密通信] 强制构建自签名 TLS 装甲，屏蔽中间人嗅探
# ==========================================================
CERT_FILE="${INSTALL_DIR}/core/cert.pem"
KEY_FILE="${INSTALL_DIR}/core/key.pem"
if [ ! -f "$CERT_FILE" ] || [ ! -f "$KEY_FILE" ]; then
echo "🔐 [Agent] 正在生成本地自签名 TLS 加密证书 (2048位 RSA)..."
openssl req -x509 -nodes -days 3650 -newkey rsa:2048 \
-keyout "$KEY_FILE" -out "$CERT_FILE" \
-subj "/C=US/O=IP-Sentinel/CN=Agent-Sec" >/dev/null 2>&1 || true
fi
# ==========================================================
# [引擎核心] Python3 高并发 Webhook 侦听与路由枢纽
# ==========================================================
cat > "${INSTALL_DIR}/core/webhook.py" << 'EOF'
import http.server
import socketserver
import subprocess
import sys
import os
import html
import urllib.parse
import urllib.request
import hmac
import hashlib
import time
PORT = int(sys.argv[1])
# ----------------------------------------------------------
# [防御矩阵] Nonce 缓存池防重放攻击 (Replay Attack)
# ----------------------------------------------------------
USED_SIGNS = {}
def clean_used_signs():
now = time.time()
# [安全策略] 滑动清理超 65 秒过期签名，保障内存健康
expired = [s for s, t in USED_SIGNS.items() if now - t > 65]
for s in expired:
del USED_SIGNS[s]
# [权限鉴权] 提取 CHAT_ID 作为 PSK 预共享密钥
AUTH_TOKEN = ""
if os.path.exists('/opt/ip_sentinel/config.conf'):
with open('/opt/ip_sentinel/config.conf', 'r') as f:
for line in f:
line = line.strip()
if line.startswith('CHAT_ID='):
AUTH_TOKEN = line.split('=', 1)[1].strip('"\'')
break
class AgentHandler(http.server.BaseHTTPRequestHandler):
def do_GET(self):
# [权限校验] 路径解析与 HMAC-SHA256 动态签名核验
parsed = urllib.parse.urlparse(self.path)
req_path = parsed.path
if AUTH_TOKEN:
query = urllib.parse.parse_qs(parsed.query)
req_t = query.get('t', [''])[0]
req_sign = query.get('sign', [''])[0]
if not req_t or not req_sign:
self.send_response(401)
self.end_headers()
self.wfile.write(b"401 Unauthorized: Missing Signature\n")
return
try:
current_time = int(time.time())
# [防重放 1] 校验时间戳防偏离 (±60秒窗口，免疫隔夜抓包重放)
if abs(current_time - int(req_t)) > 60:
self.send_response(401)
self.end_headers()
self.wfile.write(b"401 Unauthorized: Request Expired\n")
return
except ValueError:
self.send_response(401)
self.end_headers()
return
# [防重放 2] Nonce 精确核对 (拦截 60 秒内的 MITM 并发重放洗劫)
clean_used_signs()
if req_sign in USED_SIGNS:
self.send_response(401)
self.end_headers()
self.wfile.write(b"401 Unauthorized: Replay Attack Detected\n")
return
# [身份核验] 数据完整性校验，使用 compare_digest 免疫时序探测攻击
msg = f"{req_path}:{req_t}".encode('utf-8')
expected_sign = hmac.new(AUTH_TOKEN.encode('utf-8'), msg, hashlib.sha256).hexdigest()
if not hmac.compare_digest(expected_sign, req_sign):
self.send_response(401)
self.end_headers()
self.wfile.write(b"401 Unauthorized: Signature Mismatch\n")
return
# 鉴权通过，登记 Nonce 载荷
USED_SIGNS[req_sign] = current_time
# ==========================================================
# [指令分发] 模块级业务路由矩阵 (精确匹配策略)
# ==========================================================
# 路由 0: 全局统筹调度
if req_path == '/trigger_run':
if os.path.exists('/opt/ip_sentinel/core/runner.sh'):
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: runner\n")
os.system("nohup bash /opt/ip_sentinel/core/runner.sh >/dev/null 2>&1 &")
else:
self.send_response(404)
self.end_headers()
# 路由 1: Google 区域纠偏探测
elif req_path == '/trigger_google':
if os.path.exists('/opt/ip_sentinel/core/mod_google.sh'):
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: mod_google\n")
os.system("nohup bash /opt/ip_sentinel/core/mod_google.sh >/dev/null 2>&1 &")
else:
self.send_response(403)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"403 Forbidden: Google Module Disabled\n")
# 路由 2: IP 信用数据清洗
elif req_path == '/trigger_trust':
if os.path.exists('/opt/ip_sentinel/core/mod_trust.sh'):
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: mod_trust\n")
os.system("nohup bash /opt/ip_sentinel/core/mod_trust.sh >/dev/null 2>&1 &")
else:
self.send_response(403)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"403 Forbidden: Trust Module Disabled\n")
# 路由 3: 触发异步战报生成
elif req_path == '/trigger_report':
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: tg_report\n")
os.system("nohup bash /opt/ip_sentinel/core/tg_report.sh >/dev/null 2>&1 &")
# 路由 4: 获取并回传实时日志切片
elif req_path == '/trigger_log':
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: fetch_log\n")
try:
config = {}
if os.path.exists('/opt/ip_sentinel/config.conf'):
with open('/opt/ip_sentinel/config.conf', 'r') as f:
for line in f:
line = line.strip()
if '=' in line and not line.startswith('#'):
key, val = line.split('=', 1)
config[key] = val.strip('"\'')
log_data = "日志文件不存在或为空"
log_path = '/opt/ip_sentinel/logs/sentinel.log'
if os.path.exists(log_path):
with open(log_path, 'r', errors='ignore') as f:
lines = f.readlines()
if lines:
log_data = html.escape("".join(lines[-15:]))
# 动态提取终端状态以构建回传信息
local_ver = config.get('AGENT_VERSION', '未知')
node_alias = config.get('NODE_ALIAS', config.get('NODE_NAME', 'Unknown-Node'))
text_msg = f"📄 [{node_alias}] 实时日志 (v{local_ver}):\n{log_data}
"
# [交互反馈] 构建内联 JSON Payload 回调指令
import json
node_name_cb = config.get('NODE_NAME', 'Unknown')
payload = {
'chat_id': config.get('CHAT_ID', ''),
'text': text_msg,
'parse_mode': 'HTML',
'reply_markup': {
'inline_keyboard': [[{'text': '⚙️ 调出该节点控制台', 'callback_data': f'manage:{node_name_cb}'}]]
}
}
data = json.dumps(payload).encode('utf-8')
req = urllib.request.Request(
config.get('TG_API_URL', ''),
data=data,
headers={
'User-Agent': f'IP-Sentinel-Agent/{local_ver}',
'Content-Type': 'application/json'
}
)
urllib.request.urlopen(req, timeout=10)
except Exception as e:
print(f"Log transmission failed: {e}")
# 路由 5: 深海声呐模块触发
elif req_path == '/trigger_quality':
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: trigger_quality\n")
if os.path.exists('/opt/ip_sentinel/core/mod_quality.sh'):
os.system("nohup bash /opt/ip_sentinel/core/mod_quality.sh >/dev/null 2>&1 &")
# 路由 6: 节点展示别名热修改 (全量 WAF 防护)
elif req_path == '/trigger_rename':
b64_alias = query.get('b64', [''])[0]
if not b64_alias:
self.send_response(400)
self.end_headers()
self.wfile.write(b"400 Bad Request: Alias is empty\n")
return
import re
import base64
try:
# [防线/容灾] 还原安全 Base64 编码，屏蔽乱码级注入风险
pad = len(b64_alias) % 4
if pad > 0:
b64_alias += '=' * (4 - pad)
b64_alias = b64_alias.replace('-', '+').replace('_', '/')
raw_alias = base64.b64decode(b64_alias).decode('utf-8', errors='ignore')
# 强格式清洗：剔除潜在非法字符，保护 TG 面板不被恶意解析撑爆
decoded_alias = raw_alias.replace('_', '-')
safe_alias = re.sub(r'[^a-zA-Z0-9\-\u4e00-\u9fa5]', '', decoded_alias)[:20]
if safe_alias:
# [底层交互] 利用 fcntl 独占锁执行安全写操作，防止并发数据被截断
config_path = '/opt/ip_sentinel/config.conf'
import fcntl
with open(config_path, 'r+', encoding='utf-8', errors='ignore') as f:
fcntl.flock(f, fcntl.LOCK_EX)
lines = f.readlines()
alias_found = False
for i, line in enumerate(lines):
if line.startswith('NODE_ALIAS='):
lines[i] = f'NODE_ALIAS="{safe_alias}"\n'
alias_found = True
break
if not alias_found:
lines.append(f'NODE_ALIAS="{safe_alias}"\n')
f.seek(0)
f.writelines(lines)
f.truncate()
fcntl.flock(f, fcntl.LOCK_UN)
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: trigger_rename\n")
return
except Exception as e:
self.send_response(500)
self.end_headers()
self.wfile.write(f"500 Internal Error: {str(e)}\n".encode('utf-8'))
return
self.send_response(400)
self.end_headers()
self.wfile.write(b"400 Bad Request: Invalid Characters\n")
# 路由 7: 功能模块动态起停 (Feature Flag API)
elif req_path == '/trigger_toggle':
mod_name = query.get('mod', [''])[0]
target_state = query.get('state', [''])[0].lower()
if mod_name not in ['google', 'trust'] or target_state not in ['true', 'false']:
self.send_response(400)
self.end_headers()
self.wfile.write(b"400 Bad Request: Invalid parameters\n")
return
config_key = f"ENABLE_{mod_name.upper()}="
try:
config_path = '/opt/ip_sentinel/config.conf'
import fcntl
with open(config_path, 'r+', encoding='utf-8', errors='ignore') as f:
fcntl.flock(f, fcntl.LOCK_EX)
lines = f.readlines()
found = False
for i, line in enumerate(lines):
if line.startswith(config_key):
lines[i] = f'{config_key}"{target_state}"\n'
found = True
break
if not found:
lines.append(f'{config_key}"{target_state}"\n')
f.seek(0)
f.writelines(lines)
f.truncate()
fcntl.flock(f, fcntl.LOCK_UN)
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: trigger_toggle\n")
except Exception as e:
self.send_response(500)
self.end_headers()
self.wfile.write(f"500 Internal Error: {str(e)}\n".encode('utf-8'))
# 路由 8: 零信任 OTA 远程热更新链路
elif req_path == '/trigger_ota':
try:
config_mem = {}
config_path = '/opt/ip_sentinel/config.conf'
if os.path.exists(config_path):
with open(config_path, 'r', errors='ignore') as f:
for line in f:
line = line.strip()
if '=' in line and not line.startswith('#'):
key, val = line.split('=', 1)
config_mem[key] = val.strip('"\'')
# [OTA 熔断器 1] 核验 Agent 本地策略是否授予了更新权限
if config_mem.get('ENABLE_OTA', 'false').lower() != 'true':
self.send_response(403)
self.end_headers()
self.wfile.write(b"403 Forbidden: OTA Upgrade Disabled locally\n")
return
# [OTA 熔断器 2] 检测官方网关硬编码限制，防范越权投毒
if config_mem.get('TG_TOKEN', '') == 'OFFICIAL_GATEWAY_MODE':
self.send_response(403)
self.end_headers()
self.wfile.write(b"403 Forbidden: OTA strictly disabled under Public Gateway mode\n")
return
self.send_response(200)
self.send_header("Content-type", "text/plain")
self.end_headers()
self.wfile.write(b"Action Accepted: trigger_ota\n")
# [防线/容灾] 逃逸 Cgroup 隔离沙盒，并引入前置脚本语法校验防砖
import shutil
import base64
repo_url = "https://raw.githubusercontent.com/hotyue/IP-Sentinel/main"
if os.path.exists('/opt/ip_sentinel/core/install.sh'):
with open('/opt/ip_sentinel/core/install.sh', 'r') as f:
for line in f:
if line.startswith('REPO_RAW_URL='):
repo_url = line.split('=', 1)[1].strip('"\'')
break
err_msg = f"❌ **OTA 熔断告警**\n📍 节点: `{config_mem.get('NODE_ALIAS', '未知')}`\n⚠️ 原因: 脚本语法校验(bash -n)未通过，下载可能不完整。\n🚀 状态: 升级已取消，节点安全。"
err_msg_b64 = base64.b64encode(err_msg.encode('utf-8')).decode('utf-8')
tg_url = config_mem.get('TG_API_URL', '')
chat_id = config_mem.get('CHAT_ID', '')
# 将升级逻辑进行 Base64 深层封装，免疫 Popen 或 Systemd 传递带来的指令注入风险
ota_script = f"""
export SILENT_OTA="true"
curl -fsSL {repo_url}/core/install.sh -o /tmp/ota_agent.sh
if bash -n /tmp/ota_agent.sh; then
bash /tmp/ota_agent.sh > /opt/ip_sentinel/logs/ota_upgrade.log 2>&1
else
MSG=$(echo '{err_msg_b64}' | base64 -d)
curl -s -m 10 -X POST "{tg_url}" -d "chat_id={chat_id}" -d "text=$MSG" -d "parse_mode=Markdown" > /dev/null 2>&1
echo "OTA Checksum Failed: Script corrupted" > /opt/ip_sentinel/logs/ota_upgrade.log
fi
"""
ota_script_b64 = base64.b64encode(ota_script.encode('utf-8')).decode('utf-8')
if shutil.which("systemd-run"):
full_cmd = f"systemd-run --quiet --no-block bash -c \"echo '{ota_script_b64}' | base64 -d | bash\""
else:
full_cmd = f"nohup bash -c \"echo '{ota_script_b64}' | base64 -d | bash\" >/dev/null 2>&1 &"
os.system(full_cmd)
except Exception as e:
self.send_response(500)
self.end_headers()
self.wfile.write(f"500 Internal Error: {str(e)}\n".encode('utf-8'))
else:
self.send_response(404)
self.end_headers()
def log_message(self, format, *args):
pass
import socket
# ----------------------------------------------------------
# [核心架构] 多线程非阻塞 Socket 模型 (抵抗 Slowloris 及阻塞攻击)
# ----------------------------------------------------------
class ThreadedServer(socketserver.ThreadingMixIn, socketserver.TCPServer):
allow_reuse_address = True
# [恢复经典架构] 直接解析固化配置文件，最稳定的协议栈探底方案
bind_addr = "0.0.0.0"
ThreadedServer.address_family = socket.AF_INET
config_path = '/opt/ip_sentinel/config.conf'
if os.path.exists(config_path):
with open(config_path, 'r', errors='ignore') as f:
for line in f:
if line.startswith('PUBLIC_IP='):
pub_ip = line.split('=', 1)[1].strip('"\'')
if ':' in pub_ip:
bind_addr = "::"
ThreadedServer.address_family = socket.AF_INET6
break
httpd = ThreadedServer((bind_addr, PORT), AgentHandler)
# ----------------------------------------------------------
# [加密通信] 强制全网挂载 TLS 加密隧道上下文
# ----------------------------------------------------------
import ssl
cert_path = '/opt/ip_sentinel/core/cert.pem'
key_path = '/opt/ip_sentinel/core/key.pem'
if os.path.exists(cert_path) and os.path.exists(key_path):
try:
context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
context.load_cert_chain(certfile=cert_path, keyfile=key_path)
httpd.socket = context.wrap_socket(httpd.socket, server_side=True)
except Exception as e:
print(f"SSL 隧道构建失败，退化为 HTTP: {e}")
try:
httpd.serve_forever()
except Exception as e:
sys.exit(1)
EOF
echo "🚀 [Agent] 正在启动 Webhook 监听服务 (端口: $AGENT_PORT)..."
exec python3 "${INSTALL_DIR}/core/webhook.py" "$AGENT_PORT"