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generate.py
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generate.py
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import os
import json
import string
import random
alphabet = sorted(string.digits + string.ascii_letters)
CONFIG = {
"mirrors_base_url": "mirrors.tuna.tsinghua.edu.cn",
"pypi_index_url": "https://pypi.tuna.tsinghua.edu.cn/simple",
"npm_mirror_url": "http://registry.npmmirror.com/",
"port_range_start": 65100,
"show_download_host": True,
"download_url": "http://localhost:65199",
"download_server": True,
"web_netcat_server": True,
"server_port": 65199,
"show_echo_msg": True,
"show_warn_msg": True,
"resource_limit": {
"enable": True,
"max_memory": "512M",
"max_cpu": "0.5"
}
}
HELLO = r'''
______ ________ ________ __ __ ______
/ \ / |/ | / \ / | / \
/$$$$$$ |$$$$$$$$/ $$$$$$$$/ $$ \ $$ |/$$$$$$ |
$$ | $$/ $$ | $$ |__ ______ $$$ \$$ |$$ | $$/
$$ | $$ | $$ |/ |$$$$ $$ |$$ |
$$ | __ $$ | $$$$$/ $$$$$$/ $$ $$ $$ |$$ | __
$$ \__/ | $$ | $$ | $$ |$$$$ |$$ \__/ |
$$ $$/ $$ | $$ | $$ | $$$ |$$ $$/
$$$$$$/ $$/ $$/ $$/ $$/ $$$$$$/
'''.split('\n')
VERSION = ' 3.0.0 '
def init():
col, _ = os.get_terminal_size()
print('=' * col)
print('\n'.join(i.ljust(56).center(col) for i in HELLO))
print(VERSION.center(col, '='))
if not os.path.exists('tmp/run'):
os.makedirs('tmp/run')
else:
for root, _, files in os.walk('tmp'):
for file in files:
os.remove(os.path.join(root, file))
if not os.path.exists('global.json'):
with open('template/global.json', 'r') as f:
with open('global.json', 'w') as g:
g.write(f.read())
print('[+] Please edit your custom config in global.json')
else:
with open('global.json', 'r') as f:
CONFIG.update(json.load(f))
if not os.path.exists('challenges'):
os.makedirs('challenges')
print('[+] Please put your challenges in ./challenges/')
print(
'[+] You can find examples at https://github.com/GZTimeWalker/CTF-nc-docker')
if not os.path.exists('attachments'):
os.makedirs('attachments')
if not os.path.exists('template'):
print('[!] No template available!')
exit(1)
else:
requires = ['Dockerfile', 'Dockerfile.build', 'docker-compose.yml',
'xinetd', 'config.json', 'index.html', 'global.json']
for root, _, files in os.walk('template'):
for file in requires:
if file not in files:
print(
f'Template file {os.path.join(root,file)} not found!')
exit(1)
def get_challenges():
challenges = []
for challenge in os.listdir('challenges'):
if not os.path.isdir(os.path.join('challenges', challenge)):
continue
if not os.path.exists(os.path.join('challenges', challenge, 'config.json')):
with open('template/config.json', 'r') as default_config:
with open(os.path.join('challenges', challenge, 'config.json'), 'w') as f:
f.write(default_config.read())
else:
cfg = json.load(
open(os.path.join('template', 'config.json'), 'r', encoding='utf-8'))
with open(os.path.join('challenges', challenge, 'config.json'), 'r', encoding='utf-8') as f:
cfg.update(json.load(f))
p = {
'name': challenge.replace(' ', '_').replace('-', '_'),
'dir': ''.join([random.choice(alphabet) for _ in range(16)])
}
p.update(cfg)
if 'order' not in p.keys():
p['order'] = 10
print(
f'[!] Challenge "{challenge}" has no order, set it to 10')
if p['enable']:
challenges.append(p)
return sorted(challenges, key=lambda x: x['order'])
def get_all_files(path):
files_ = []
for root, dirs, files in os.walk(path):
for file in files:
if file != 'config.json':
files_.append(os.path.join(root, file).replace('\\', '/'))
for dir_ in dirs:
files_ += get_all_files(os.path.join(root, dir_))
return files_
def generate_dockerfile(challenges):
print(f'[+] Generating Dockerfile...')
dockerfile_data = {
'mirrors_base_url': CONFIG['mirrors_base_url'],
'pypi_index': '' if CONFIG['pypi_index_url'] == '' else f"-i {CONFIG['pypi_index_url']}",
'npm_mirror_url': CONFIG['npm_mirror_url'],
'extra_cmd': '',
'copy_challenge_cmd': '',
'copy_dirs': [],
'chmod_cmd': '',
'chmod_cmds': [],
'pip_requirements': '',
'apt_requirements': '',
'node_server': '',
'pip_list': [],
'apt_list': []
}
for challenge in challenges:
dockerfile_data['pip_list'] += challenge['pip_requirements']
dockerfile_data['apt_list'] += challenge['apt_requirements']
if len(challenge['extra_cmd']) > 0:
dockerfile_data['extra_cmd'] += f"# ==> for {challenge['name']}\n"
for cmd in challenge['extra_cmd']:
dockerfile_data['extra_cmd'] += f"RUN {cmd}\n"
if challenge['all_copy'] or len(challenge['copy_files']) > 0:
dockerfile_data['copy_challenge_cmd'] += f"# ==> for {challenge['name']}\n"
if challenge['all_copy']:
items = get_all_files(os.path.join(
'challenges', challenge['name']))
else:
items = [f"challenges/{challenge['name']}/" +
i for i in challenge['copy_files']]
dest = f"{challenge['dir']}/"
dockerfile_data['copy_challenge_cmd'] += f"COPY {' '.join(items)} {dest}\n"
script = f"#!/bin/sh\n\ncd /home/ctf/{challenge['dir']}\n"
if CONFIG['show_echo_msg'] and len(challenge['echo_msg']) > 0:
script += "echo \'\\e[32m{}\\e[0m\'\n".format(
(' \\e[33m' + challenge['name'] + ' \\e[32m').center(72, '='))
if CONFIG['show_warn_msg']:
script += "echo \'\\e[32m!!! \\e[31m此环境为测试训练环境，安全性较弱，请勿执行恶意代码 \\e[32m!!!\\e[0m\'\n"
script += "echo \'\\e[32m!!! \\e[31mDO NOT EXECUTE HARMFUL CODE IN THIS TRAINING ENV \\e[32m!!!\\e[0m\'\n"
script += "echo \'\\e[32m{}\\e[0m\'\n".format('=' * 60)
for item in challenge['echo_msg']:
script += f"echo \'{item}\'\n"
if challenge['download_file_name'] != "":
if CONFIG['show_download_host']:
script += f"echo \'题目附件：{CONFIG['download_url']}/{challenge['download_file_name']}\'\n"
else:
script += f"echo \'题目附件：/{challenge['download_file_name']}\'\n"
script += "echo \'\\e[32m{}\\e[0m\'\n".format('=' * 60)
script += "echo \'\'\n"
script += f"{challenge['launch']} {' '.join(challenge['args'])}\n"
with open(f"tmp/run/{challenge['dir']}.sh", 'wb') as f:
f.write(script.encode())
dockerfile_data['chmod_cmds'].append(
f"chmod 755 /home/ctf/run/{challenge['dir']}.sh")
dockerfile_data['chmod_cmds'].append(
f"chmod -R 755 /home/ctf/{challenge['dir']}")
if len(dockerfile_data['pip_list']) > 0:
dockerfile_data['pip_requirements'] = ' '.join(
dockerfile_data['pip_list'])
else:
dockerfile_data['pip_requirements'] = 'pip'
if len(dockerfile_data['apt_list']) > 0:
dockerfile_data['apt_requirements'] = ' '.join(
dockerfile_data['apt_list'])
template_name = 'Dockerfile'
# choose one server
if CONFIG['web_netcat_server']:
dockerfile_data['node_server'] += "COPY web/webnc /build/\n"
dockerfile_data['node_server'] += "COPY web/src/webnc /src/\n"
dockerfile_data['node_server'] += "RUN npm i -g pnpm && cd /src && pnpm i && pnpm run build &&\\\n"
dockerfile_data['node_server'] += " mkdir -p /build/static/wnc && mv /src/build/* /build/static/wnc\n"
elif CONFIG['download_server']:
dockerfile_data['node_server'] += "COPY web/fileonly /build/\n"
if CONFIG['web_netcat_server'] or CONFIG['download_server']:
template_name = 'Dockerfile.build'
if CONFIG['download_server']:
dockerfile_data['node_server'] += "COPY tmp/index.html attachments /build/static/\n"
dockerfile_data['chmod_cmd'] = "RUN " + \
' && \\\n '.join(dockerfile_data['chmod_cmds'])
with open(f'template/{template_name}', 'r') as f:
template = f.read()
with open('Dockerfile', 'wb') as f:
f.write(template.format(**dockerfile_data).encode())
def generate_start_sh(challenges):
print(f'[+] Generating launch script...')
template = '#!/bin/sh\n\n'
if CONFIG['web_netcat_server']:
template += 'cd /home/ctf/web\n'
template += f'nohup node server.js {CONFIG["server_port"]} '
template += f'{CONFIG["port_range_start"]}-{CONFIG["port_range_start"] + len(challenges) - 1} '
template += f'> /var/log/server.log 2>&1 &\n'
elif CONFIG['download_server']:
template += 'cd /home/ctf/web\n'
template += f'nohup node server.js {CONFIG["server_port"]} > /var/log/server.log 2>&1 &\n'
template += 'cd / && xinetd -dontfork'
with open('tmp/start.sh', 'wb') as f:
f.write(template.encode())
def generate_index(challenges):
print(f'[+] Generating web index...')
port = CONFIG['port_range_start']
index_data = ""
for challenge in challenges:
row = f'<tr><td>{challenge["name"]}</td><td><code>{port}</code></td></tr>'
port = port + 1
index_data += row
with open('template/index.html', 'r') as f:
template = f.read()
with open('tmp/index.html', 'wb') as f:
template = template.replace('{challenges_trs}', index_data)
if CONFIG['web_netcat_server']:
template = template.replace(
'{web_netcat_link}', '<p> Web netcat: <a href="/wnc"><code><span class="url"></span>/wnc</code></a></p>')
else:
template = template.replace('{web_netcat_link}', '')
f.write(template.encode())
def generate_xinetd(challenges):
print(f'[+] Generating xinetd config...')
port = CONFIG['port_range_start']
with open('template/xinetd', 'r') as f:
template = f.read()
with open('xinetd', 'wb') as f:
for challenge in challenges:
challenge_data = {
'port': port,
'user': 'ctf' if 'user' not in challenge.keys() else challenge['user'],
'challenge_name': challenge['name'],
'challenge_alian': challenge['dir']
}
f.write(template.format(**challenge_data).encode())
f.write(b'\n\n')
port += 1
def generate_dockercompose(challenges):
dockercompose_data = {}
print(f'[+] Generating docker-compose.yml...')
with open('template/docker-compose.yml', 'r') as f:
template = f.read()
ports = ''
port = CONFIG['port_range_start']
ports += f'- "{port}-{port + len(challenges) - 1}:{port}-{port + len(challenges) - 1}"\n '
port = CONFIG['server_port']
ports += f'- "{port}:{port}"'
dockercompose_data['ports'] = ports
res_lim = ''
if CONFIG['resource_limit']['enable']:
res_lim += 'deploy:\n resources:\n limits:\n'
res_lim += f' cpus: "{CONFIG["resource_limit"]["max_cpu"]}"\n'
print(
f'[+] Container CPU limit: {CONFIG["resource_limit"]["max_cpu"]}')
res_lim += f' memory: "{CONFIG["resource_limit"]["max_memory"]}"\n'
print(
f'[+] Container Memory limit: {CONFIG["resource_limit"]["max_memory"]}')
dockercompose_data['resource_limit'] = res_lim
with open('docker-compose.yml', 'w') as f:
f.write(template.format(**dockercompose_data))
if __name__ == "__main__":
init()
challenges = get_challenges()
if (len(challenges) == 0):
print('[!] No challenge found!')
exit(1)
print(f'[+] Loaded {len(challenges)} challenges')
generate_start_sh(challenges)
generate_index(challenges)
generate_dockerfile(challenges)
generate_xinetd(challenges)
generate_dockercompose(challenges)
ret = os.system('docker-compose --compatibility up --build -d')
if ret != 0:
print('[!] Error occured, exiting...')
exit(ret)
print('[+] Successfully generated CTF-NC container.')
print('[+] Your challenges are now available at following ports:')
port = CONFIG['port_range_start']
for challenge in challenges:
print(f" => [{port}] => {challenge['name']}")
port = port + 1
if CONFIG['download_server']:
print(
f'[+] Your web page is now available at http://localhost:{CONFIG["server_port"]}.')
if CONFIG['web_netcat_server']:
print(
f'[+] Your web netcat is now available at http://localhost:{CONFIG["server_port"]}/wnc.')