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https://github.com/mail-in-a-box/mailinabox.git
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1b2711fc42
This will make it so that the HSTS header is sent regardless of the request status code (until this point it would only be sent if "the response code equals 200, 201, 206, 301, 302, 303, 307, or 308." - according to thttp://nginx.org/en/docs/http/ngx_http_headers_module.html#add_header)
254 lines
10 KiB
Python
254 lines
10 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, 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:
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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 |= set('www.' + zone for zone, zonefile in get_dns_zones(env))
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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.
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domains |= set('autoconfig.' + maildomain for maildomain in get_mail_domains(env, users_only=True))
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domains |= set('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 |= set('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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domains = sort_domains(domains, env)
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return domains
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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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custom_settings = rtyaml.load(open(nginx_conf_custom_fn))
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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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# Build an nginx configuration file.
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nginx_conf = open(os.path.join(os.path.dirname(__file__), "../conf/nginx-top.conf")).read()
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# Load the templates.
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template0 = open(os.path.join(os.path.dirname(__file__), "../conf/nginx.conf")).read()
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template1 = open(os.path.join(os.path.dirname(__file__), "../conf/nginx-alldomains.conf")).read()
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template2 = open(os.path.join(os.path.dirname(__file__), "../conf/nginx-primaryonly.conf")).read()
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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) 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") 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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f = open(filepath, 'rb')
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try:
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sha1.update(f.read())
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finally:
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f.close()
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return sha1.hexdigest()
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nginx_conf_extra += "# ssl files sha1: %s / %s\n" % (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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yaml = rtyaml.load(open(nginx_conf_custom_fn))
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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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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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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 pass_http_host_header:
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nginx_conf_extra += "\n\t\tproxy_set_header Host $http_host;"
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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 += "\trewrite %s %s permanent;\n" % (path, url)
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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 += "add_header Strict-Transport-Security \"max-age=15768000\" always;\n"
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elif hsts == "preload":
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nginx_conf_extra += "add_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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nginx_conf = nginx_conf.replace("$REDIRECT_DOMAIN", re.sub(r"^www\.", "", domain)) # for default www redirects to parent domain
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return nginx_conf
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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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