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Update import_nginx_waf.py
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fab
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@ -2,122 +2,150 @@ import os
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import subprocess
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import logging
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from pathlib import Path
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import shutil
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import filecmp
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import time
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# Configure logging
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logging.basicConfig(
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level=logging.INFO,
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format="%(asctime)s - %(levelname)s - %(message)s",
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handlers=[logging.StreamHandler()],
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)
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# --- Configuration ---
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LOG_LEVEL = logging.INFO # DEBUG, INFO, WARNING, ERROR
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WAF_DIR = Path(os.getenv("WAF_DIR", "waf_patterns/nginx")).resolve()
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NGINX_WAF_DIR = Path(os.getenv("NGINX_WAF_DIR", "/etc/nginx/waf/")).resolve()
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NGINX_CONF = Path(os.getenv("NGINX_CONF", "/etc/nginx/nginx.conf")).resolve()
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BACKUP_DIR = Path(os.getenv("BACKUP_DIR", "/etc/nginx/waf_backup/")).resolve()
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INCLUDE_STATEMENT = "include /etc/nginx/waf/*.conf;"
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# --- Logging Setup ---
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logging.basicConfig(level=LOG_LEVEL, format="%(asctime)s - %(levelname)s - %(message)s")
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logger = logging.getLogger(__name__)
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# Constants (configurable via environment variables)
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WAF_DIR = Path(os.getenv("WAF_DIR", "/tmp/waf_patterns/nginx")).resolve() # Source directory for WAF files
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NGINX_WAF_DIR = Path(os.getenv("NGINX_WAF_DIR", "/etc/nginx/waf/")).resolve() # Target directory
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NGINX_CONF = Path(os.getenv("NGINX_CONF", "/etc/nginx/nginx.conf")).resolve() # Nginx config file
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INCLUDE_STATEMENT = "include /etc/nginx/waf/*.conf;" # Include directive
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def copy_waf_files():
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"""
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Copy Nginx WAF configuration files to the target directory.
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"""Copies WAF files, handling existing files, and creating backups."""
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logger.info("Copying Nginx WAF patterns...")
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Raises:
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Exception: If there is an error copying files.
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"""
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logging.info("Copying Nginx WAF patterns...")
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try:
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# Ensure the target directory exists
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NGINX_WAF_DIR.mkdir(parents=True, exist_ok=True)
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logging.info(f"[+] Created or verified directory: {NGINX_WAF_DIR}")
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BACKUP_DIR.mkdir(parents=True, exist_ok=True)
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# Copy .conf files from source to target directory
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for conf_file in WAF_DIR.glob("*.conf"):
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dst_path = NGINX_WAF_DIR / conf_file.name
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if dst_path.exists():
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logging.warning(f"[!] File already exists: {dst_path}")
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continue
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try:
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subprocess.run(["cp", str(conf_file), str(dst_path)], check=True)
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logging.info(f"[+] Copied {conf_file} to {NGINX_WAF_DIR}")
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except subprocess.CalledProcessError as e:
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logging.error(f"[!] Failed to copy {conf_file}: {e}")
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raise
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except Exception as e:
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logging.error(f"[!] Error copying WAF files: {e}")
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if dst_path.exists():
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# Compare and backup if different
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if filecmp.cmp(conf_file, dst_path, shallow=False):
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logger.info(f"Skipping {conf_file.name} (identical file exists).")
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continue
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# Backup different file
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backup_path = BACKUP_DIR / f"{dst_path.name}.{int(time.time())}"
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logger.warning(f"Existing {dst_path.name} differs. Backing up to {backup_path}")
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shutil.copy2(dst_path, backup_path)
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# Copy the (new/updated) file
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shutil.copy2(conf_file, dst_path)
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logger.info(f"Copied {conf_file.name} to {dst_path}")
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except OSError as e:
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logger.error(f"Error copying {conf_file.name}: {e}")
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raise
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def update_nginx_conf():
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"""
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Ensure the WAF include statement is present in the Nginx configuration file.
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Raises:
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Exception: If there is an error updating the Nginx configuration.
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"""
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logging.info("Ensuring WAF patterns are included in nginx.conf...")
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"""Ensures the include directive is present in nginx.conf (http context)."""
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logger.info("Checking Nginx configuration for WAF include...")
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try:
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# Read the current configuration
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with open(NGINX_CONF, "r") as f:
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config = f.read()
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config_lines = f.readlines()
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# Append include statement if not present
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if INCLUDE_STATEMENT not in config:
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logging.info("Adding WAF include to nginx.conf...")
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# Check if the include statement is already present.
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include_present = any(INCLUDE_STATEMENT in line for line in config_lines)
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if not include_present:
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# Find the 'http' block. This is where the include belongs.
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http_start = -1
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for i, line in enumerate(config_lines):
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if line.strip().startswith("http {"):
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http_start = i
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break
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if http_start == -1:
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# No http block found. Add the include *and* the http block.
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logger.warning("No 'http' block found. Adding to end of file.")
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with open(NGINX_CONF, "a") as f:
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f.write(f"\n{INCLUDE_STATEMENT}\n")
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logging.info("[+] WAF include statement added to nginx.conf.")
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f.write(f"\nhttp {{\n {INCLUDE_STATEMENT}\n}}\n")
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logger.info(f"Added 'http' block and WAF include to {NGINX_CONF}")
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return
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# Find the end of the 'http' block
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http_end = -1
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for i in range(http_start + 1, len(config_lines)):
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if line.strip() == "}":
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http_end = i
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break
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if http_end == -1:
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# Malformed config? Shouldn't happen, but handle it.
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http_end = len(config_lines)
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logger.warning("Malformed Nginx config (no closing brace for 'http' block).")
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# Insert the include statement *within* the http block.
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config_lines.insert(http_end, f" {INCLUDE_STATEMENT}\n")
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# Write the modified configuration back.
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with open(NGINX_CONF, "w") as f:
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f.writelines(config_lines)
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logger.info(f"Added WAF include to 'http' block in {NGINX_CONF}")
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else:
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logging.info("WAF already included in nginx.conf.")
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except Exception as e:
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logging.error(f"[!] Error updating Nginx configuration: {e}")
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logger.info("WAF include statement already present.")
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except FileNotFoundError:
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logger.error(f"Nginx configuration file not found: {NGINX_CONF}")
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raise
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except OSError as e:
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logger.error(f"Error updating Nginx configuration: {e}")
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raise
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def reload_nginx():
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"""
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Reload Nginx to apply the new WAF rules.
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Raises:
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Exception: If there is an error reloading Nginx.
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"""
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logging.info("Reloading Nginx to apply new WAF rules...")
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"""Tests the Nginx configuration and reloads if valid."""
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logger.info("Reloading Nginx...")
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try:
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# Test Nginx configuration
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subprocess.run(["nginx", "-t"], check=True)
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logging.info("[+] Nginx configuration test passed.")
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# Test configuration
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result = subprocess.run(["nginx", "-t"],
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capture_output=True, text=True, check=True)
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logger.info(f"Nginx configuration test successful:\n{result.stdout}")
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# Reload Nginx
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subprocess.run(["systemctl", "reload", "nginx"], check=True)
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logging.info("[+] Nginx reloaded successfully.")
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result = subprocess.run(["systemctl", "reload", "nginx"],
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capture_output=True, text=True, check=True)
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logger.info("Nginx reloaded.")
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except subprocess.CalledProcessError as e:
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logging.error(f"[!] Nginx configuration test failed: {e}")
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raise
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logger.error(f"Nginx command failed: {e.cmd} - Return code: {e.returncode}")
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logger.error(f"Stdout: {e.stdout}")
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logger.error(f"Stderr: {e.stderr}")
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raise # Re-raise to signal failure
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except FileNotFoundError:
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logging.error("[!] 'nginx' or 'systemctl' command not found. Are you on a supported system?")
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logger.error("'nginx' or 'systemctl' command not found. Is Nginx/systemd installed?")
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raise
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except Exception as e:
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logging.error(f"[!] Error reloading Nginx: {e}")
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except Exception as e: # added extra exception
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logger.error(f"[!] Error reloading Nginx: {e}")
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raise
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def main():
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"""
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Main function to execute the script.
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"""
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"""Main function."""
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try:
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copy_waf_files()
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update_nginx_conf()
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reload_nginx()
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logging.info("[✔] Nginx configured with latest WAF rules.")
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logger.info("Nginx WAF configuration updated successfully.")
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except Exception as e:
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logging.critical(f"[!] Script failed: {e}")
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logger.critical(f"Script failed: {e}")
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exit(1)
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if __name__ == "__main__":
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main()
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