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dehydrated ACME TLS-ALPN-01 Responder
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#!/usr/bin/env python3 | |
import ssl | |
import socketserver | |
import threading | |
import re | |
import os | |
ALPNDIR="/etc/dehydrated/alpn-certs" | |
PROXY_PROTOCOL=False | |
FALLBACK_CERTIFICATE="/etc/vmware/ssl/rui.crt" | |
FALLBACK_KEY="/etc/vmware/ssl/rui.key" | |
class ThreadedTCPServer(socketserver.ThreadingMixIn, socketserver.TCPServer): | |
pass | |
class ThreadedTCPRequestHandler(socketserver.BaseRequestHandler): | |
def create_context(self, certfile, keyfile, first=False): | |
ssl_context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH) | |
ssl_context.set_ciphers('ECDHE+AESGCM') | |
ssl_context.set_alpn_protocols(["acme-tls/1"]) | |
ssl_context.options |= ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1 | |
if first: | |
ssl_context.set_servername_callback(self.load_certificate) | |
ssl_context.load_cert_chain(certfile=certfile, keyfile=keyfile) | |
return ssl_context | |
def load_certificate(self, sslsocket, sni_name, sslcontext): | |
print("Got request for %s" % sni_name) | |
if not re.match(r'^(([a-zA-Z]{1})|([a-zA-Z]{1}[a-zA-Z]{1})|([a-zA-Z]{1}[0-9]{1})|([0-9]{1}[a-zA-Z]{1})|([a-zA-Z0-9][-_.a-zA-Z0-9]{0,61}[a-zA-Z0-9]))\.([a-zA-Z]{2,13}|[a-zA-Z0-9-]{2,30}.[a-zA-Z]{2,3})$', sni_name): | |
return | |
certfile = os.path.join(ALPNDIR, "%s.crt.pem" % sni_name) | |
keyfile = os.path.join(ALPNDIR, "%s.key.pem" % sni_name) | |
if not os.path.exists(certfile) or not os.path.exists(keyfile): | |
return | |
sslsocket.context = self.create_context(certfile, keyfile) | |
def handle(self): | |
if PROXY_PROTOCOL: | |
buf = b"" | |
while b"\r\n" not in buf: | |
buf += self.request.recv(1) | |
ssl_context = self.create_context(FALLBACK_CERTIFICATE, FALLBACK_KEY, True) | |
newsock = ssl_context.wrap_socket(self.request, server_side=True) | |
if __name__ == "__main__": | |
HOST, PORT = "0.0.0.0", 443 | |
server = ThreadedTCPServer((HOST, PORT), ThreadedTCPRequestHandler, bind_and_activate=False) | |
server.allow_reuse_address = True | |
try: | |
server.server_bind() | |
server.server_activate() | |
server.serve_forever() | |
except: | |
server.shutdown() |
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