268 lines
11 KiB
Python
268 lines
11 KiB
Python
# Creates an nginx configuration file so we serve HTTP/HTTPS on all
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# domains for which a mail account has been set up.
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########################################################################
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import os.path, re, rtyaml
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from mailconfig import get_mail_domains
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from dns_update import get_custom_dns_config, get_dns_zones
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from ssl_certificates import get_ssl_certificates, get_domain_ssl_files, check_certificate
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from utils import shell, safe_domain_name, sort_domains
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def get_web_domains(env, include_www_redirects=True, include_auto=True, exclude_dns_elsewhere=True):
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# What domains should we serve HTTP(S) for?
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domains = set()
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# Serve web for all mail domains so that we might at least
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# provide auto-discover of email settings, and also a static website
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# if the user wants to make one.
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domains |= get_mail_domains(env)
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if include_www_redirects and include_auto:
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# Add 'www.' subdomains that we want to provide default redirects
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# to the main domain for. We'll add 'www.' to any DNS zones, i.e.
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# the topmost of each domain we serve.
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domains |= {'www.' + zone for zone, zonefile in get_dns_zones(env)}
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if include_auto:
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# Add Autoconfiguration domains for domains that there are user accounts at:
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# 'autoconfig.' for Mozilla Thunderbird auto setup.
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# 'autodiscover.' for ActiveSync autodiscovery (Z-Push).
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domains |= {'autoconfig.' + maildomain for maildomain in get_mail_domains(env, users_only=True)}
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domains |= {'autodiscover.' + maildomain for maildomain in get_mail_domains(env, users_only=True)}
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# 'mta-sts.' for MTA-STS support for all domains that have email addresses.
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domains |= {'mta-sts.' + maildomain for maildomain in get_mail_domains(env)}
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if exclude_dns_elsewhere:
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# ...Unless the domain has an A/AAAA record that maps it to a different
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# IP address than this box. Remove those domains from our list.
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domains -= get_domains_with_a_records(env)
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# Ensure the PRIMARY_HOSTNAME is in the list so we can serve webmail
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# as well as Z-Push for Exchange ActiveSync. This can't be removed
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# by a custom A/AAAA record and is never a 'www.' redirect.
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domains.add(env['PRIMARY_HOSTNAME'])
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# Sort the list so the nginx conf gets written in a stable order.
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return sort_domains(domains, env)
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def get_domains_with_a_records(env):
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domains = set()
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dns = get_custom_dns_config(env)
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for domain, rtype, value in dns:
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if rtype == "CNAME" or (rtype in {"A", "AAAA"} and value not in {"local", env['PUBLIC_IP']}):
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domains.add(domain)
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return domains
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def get_web_domains_with_root_overrides(env):
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# Load custom settings so we can tell what domains have a redirect or proxy set up on '/',
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# which means static hosting is not happening.
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root_overrides = { }
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nginx_conf_custom_fn = os.path.join(env["STORAGE_ROOT"], "www/custom.yaml")
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if os.path.exists(nginx_conf_custom_fn):
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with open(nginx_conf_custom_fn, encoding='utf-8') as f:
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custom_settings = rtyaml.load(f)
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for domain, settings in custom_settings.items():
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for type, value in [('redirect', settings.get('redirects', {}).get('/')),
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('proxy', settings.get('proxies', {}).get('/'))]:
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if value:
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root_overrides[domain] = (type, value)
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return root_overrides
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def do_web_update(env):
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# Pre-load what SSL certificates we will use for each domain.
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ssl_certificates = get_ssl_certificates(env)
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# Helper for reading config files and templates
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def read_conf(conf_fn):
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with open(os.path.join(os.path.dirname(__file__), "../conf", conf_fn), encoding='utf-8') as f:
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return f.read()
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# Build an nginx configuration file.
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nginx_conf = read_conf("nginx-top.conf")
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# Load the templates.
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template0 = read_conf("nginx.conf")
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template1 = read_conf("nginx-alldomains.conf")
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template2 = read_conf("nginx-primaryonly.conf")
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template3 = "\trewrite ^(.*) https://$REDIRECT_DOMAIN$1 permanent;\n"
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# Add the PRIMARY_HOST configuration first so it becomes nginx's default server.
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nginx_conf += make_domain_config(env['PRIMARY_HOSTNAME'], [template0, template1, template2], ssl_certificates, env)
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# Add configuration all other web domains.
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has_root_proxy_or_redirect = get_web_domains_with_root_overrides(env)
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web_domains_not_redirect = get_web_domains(env, include_www_redirects=False)
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for domain in get_web_domains(env):
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if domain == env['PRIMARY_HOSTNAME']:
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# PRIMARY_HOSTNAME is handled above.
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continue
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if domain in web_domains_not_redirect:
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# This is a regular domain.
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if domain not in has_root_proxy_or_redirect:
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nginx_conf += make_domain_config(domain, [template0, template1], ssl_certificates, env)
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else:
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nginx_conf += make_domain_config(domain, [template0], ssl_certificates, env)
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else:
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# Add default 'www.' redirect.
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nginx_conf += make_domain_config(domain, [template0, template3], ssl_certificates, env)
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# Did the file change? If not, don't bother writing & restarting nginx.
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nginx_conf_fn = "/etc/nginx/conf.d/local.conf"
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if os.path.exists(nginx_conf_fn):
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with open(nginx_conf_fn, encoding='utf-8') as f:
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if f.read() == nginx_conf:
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return ""
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# Save the file.
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with open(nginx_conf_fn, "w", encoding='utf-8') as f:
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f.write(nginx_conf)
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# Kick nginx. Since this might be called from the web admin
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# don't do a 'restart'. That would kill the connection before
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# the API returns its response. A 'reload' should be good
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# enough and doesn't break any open connections.
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shell('check_call', ["/usr/sbin/service", "nginx", "reload"])
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return "web updated\n"
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def make_domain_config(domain, templates, ssl_certificates, env):
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# GET SOME VARIABLES
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# Where will its root directory be for static files?
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root = get_web_root(domain, env)
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# What private key and SSL certificate will we use for this domain?
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tls_cert = get_domain_ssl_files(domain, ssl_certificates, env)
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# ADDITIONAL DIRECTIVES.
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nginx_conf_extra = ""
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# Because the certificate may change, we should recognize this so we
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# can trigger an nginx update.
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def hashfile(filepath):
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import hashlib
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sha1 = hashlib.sha1()
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with open(filepath, 'rb') as f:
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sha1.update(f.read())
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return sha1.hexdigest()
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nginx_conf_extra += "\t# ssl files sha1: {} / {}\n".format(hashfile(tls_cert["private-key"]), hashfile(tls_cert["certificate"]))
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# Add in any user customizations in YAML format.
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hsts = "yes"
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nginx_conf_custom_fn = os.path.join(env["STORAGE_ROOT"], "www/custom.yaml")
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if os.path.exists(nginx_conf_custom_fn):
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with open(nginx_conf_custom_fn, encoding='utf-8') as f:
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yaml = rtyaml.load(f)
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if domain in yaml:
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yaml = yaml[domain]
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# any proxy or redirect here?
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for path, url in yaml.get("proxies", {}).items():
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# Parse some flags in the fragment of the URL.
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pass_http_host_header = False
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proxy_redirect_off = False
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frame_options_header_sameorigin = False
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m = re.search("#(.*)$", url)
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if m:
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for flag in m.group(1).split(","):
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if flag == "pass-http-host":
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pass_http_host_header = True
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elif flag == "no-proxy-redirect":
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proxy_redirect_off = True
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elif flag == "frame-options-sameorigin":
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frame_options_header_sameorigin = True
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url = re.sub("#(.*)$", "", url)
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nginx_conf_extra += "\tlocation %s {" % path
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nginx_conf_extra += "\n\t\tproxy_pass %s;" % url
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if proxy_redirect_off:
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nginx_conf_extra += "\n\t\tproxy_redirect off;"
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if pass_http_host_header:
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nginx_conf_extra += "\n\t\tproxy_set_header Host $http_host;"
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if frame_options_header_sameorigin:
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nginx_conf_extra += "\n\t\tproxy_set_header X-Frame-Options SAMEORIGIN;"
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nginx_conf_extra += "\n\t\tproxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;"
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nginx_conf_extra += "\n\t\tproxy_set_header X-Forwarded-Host $http_host;"
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nginx_conf_extra += "\n\t\tproxy_set_header X-Forwarded-Proto $scheme;"
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nginx_conf_extra += "\n\t\tproxy_set_header X-Real-IP $remote_addr;"
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nginx_conf_extra += "\n\t}\n"
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for path, alias in yaml.get("aliases", {}).items():
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nginx_conf_extra += "\tlocation %s {" % path
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nginx_conf_extra += "\n\t\talias %s;" % alias
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nginx_conf_extra += "\n\t}\n"
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for path, url in yaml.get("redirects", {}).items():
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nginx_conf_extra += f"\trewrite {path} {url} permanent;\n"
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# override the HSTS directive type
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hsts = yaml.get("hsts", hsts)
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# Add the HSTS header.
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if hsts == "yes":
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nginx_conf_extra += '\tadd_header Strict-Transport-Security "max-age=15768000" always;\n'
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elif hsts == "preload":
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nginx_conf_extra += '\tadd_header Strict-Transport-Security "max-age=15768000; includeSubDomains; preload" always;\n'
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# Add in any user customizations in the includes/ folder.
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nginx_conf_custom_include = os.path.join(env["STORAGE_ROOT"], "www", safe_domain_name(domain) + ".conf")
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if os.path.exists(nginx_conf_custom_include):
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nginx_conf_extra += "\tinclude %s;\n" % (nginx_conf_custom_include)
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# PUT IT ALL TOGETHER
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# Combine the pieces. Iteratively place each template into the "# ADDITIONAL DIRECTIVES HERE" placeholder
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# of the previous template.
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nginx_conf = "# ADDITIONAL DIRECTIVES HERE\n"
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for t in [*templates, nginx_conf_extra]:
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nginx_conf = re.sub("[ \t]*# ADDITIONAL DIRECTIVES HERE *\n", t, nginx_conf)
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# Replace substitution strings in the template & return.
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nginx_conf = nginx_conf.replace("$STORAGE_ROOT", env['STORAGE_ROOT'])
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nginx_conf = nginx_conf.replace("$HOSTNAME", domain)
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nginx_conf = nginx_conf.replace("$ROOT", root)
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nginx_conf = nginx_conf.replace("$SSL_KEY", tls_cert["private-key"])
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nginx_conf = nginx_conf.replace("$SSL_CERTIFICATE", tls_cert["certificate"])
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return nginx_conf.replace("$REDIRECT_DOMAIN", re.sub(r"^www\.", "", domain)) # for default www redirects to parent domain
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def get_web_root(domain, env, test_exists=True):
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# Try STORAGE_ROOT/web/domain_name if it exists, but fall back to STORAGE_ROOT/web/default.
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for test_domain in (domain, 'default'):
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root = os.path.join(env["STORAGE_ROOT"], "www", safe_domain_name(test_domain))
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if os.path.exists(root) or not test_exists: break
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return root
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def get_web_domains_info(env):
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www_redirects = set(get_web_domains(env)) - set(get_web_domains(env, include_www_redirects=False))
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has_root_proxy_or_redirect = set(get_web_domains_with_root_overrides(env))
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ssl_certificates = get_ssl_certificates(env)
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# for the SSL config panel, get cert status
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def check_cert(domain):
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try:
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tls_cert = get_domain_ssl_files(domain, ssl_certificates, env, allow_missing_cert=True)
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except OSError: # PRIMARY_HOSTNAME cert is missing
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tls_cert = None
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if tls_cert is None: return ("danger", "No certificate installed.")
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cert_status, cert_status_details = check_certificate(domain, tls_cert["certificate"], tls_cert["private-key"])
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if cert_status == "OK":
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return ("success", "Signed & valid. " + cert_status_details)
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elif cert_status == "SELF-SIGNED":
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return ("warning", "Self-signed. Get a signed certificate to stop warnings.")
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else:
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return ("danger", "Certificate has a problem: " + cert_status)
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return [
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{
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"domain": domain,
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"root": get_web_root(domain, env),
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"custom_root": get_web_root(domain, env, test_exists=False),
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"ssl_certificate": check_cert(domain),
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"static_enabled": domain not in (www_redirects | has_root_proxy_or_redirect),
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}
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for domain in get_web_domains(env)
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]
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