281 lines
12 KiB
Python
281 lines
12 KiB
Python
# encoding: utf-8
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import falcon
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import mimetypes
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import logging
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import os
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import hashlib
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from datetime import datetime
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from xattr import listxattr, getxattr
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from certidude.auth import login_required
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from certidude.user import User
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from certidude.decorators import serialize, csrf_protection
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from certidude import const, config
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from .utils import AuthorityHandler
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logger = logging.getLogger(__name__)
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class CertificateAuthorityResource(object):
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def on_get(self, req, resp):
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logger.info("Served CA certificate to %s", req.context.get("remote_addr"))
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resp.stream = open(config.AUTHORITY_CERTIFICATE_PATH, "rb")
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resp.append_header("Content-Type", "application/x-x509-ca-cert")
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resp.append_header("Content-Disposition", "attachment; filename=%s.crt" %
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const.HOSTNAME.encode("ascii"))
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class SessionResource(AuthorityHandler):
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@csrf_protection
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@serialize
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@login_required
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def on_get(self, req, resp):
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def serialize_requests(g):
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for common_name, path, buf, req, submitted, server in g():
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try:
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submission_address = getxattr(path, "user.request.address").decode("ascii") # TODO: move to authority.py
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except IOError:
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submission_address = None
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try:
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submission_hostname = getxattr(path, "user.request.hostname").decode("ascii") # TODO: move to authority.py
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except IOError:
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submission_hostname = None
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yield dict(
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server = self.authority.server_flags(common_name),
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submitted = submitted,
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common_name = common_name,
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address = submission_address,
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hostname = submission_hostname if submission_hostname != submission_address else None,
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md5sum = hashlib.md5(buf).hexdigest(),
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sha1sum = hashlib.sha1(buf).hexdigest(),
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sha256sum = hashlib.sha256(buf).hexdigest(),
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sha512sum = hashlib.sha512(buf).hexdigest()
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)
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def serialize_revoked(g):
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for common_name, path, buf, cert, signed, expired, revoked in g():
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yield dict(
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serial = "%x" % cert.serial_number,
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common_name = common_name,
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# TODO: key type, key length, key exponent, key modulo
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signed = signed,
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expired = expired,
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revoked = revoked,
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sha256sum = hashlib.sha256(buf).hexdigest())
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def serialize_certificates(g):
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for common_name, path, buf, cert, signed, expires in g():
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# Extract certificate tags from filesystem
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try:
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tags = []
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for tag in getxattr(path, "user.xdg.tags").decode("ascii").split(","):
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if "=" in tag:
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k, v = tag.split("=", 1)
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else:
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k, v = "other", tag
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tags.append(dict(id=tag, key=k, value=v))
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except IOError: # No such attribute(s)
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tags = None
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attributes = {}
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for key in listxattr(path):
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if key.startswith(b"user.machine."):
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attributes[key[13:].decode("ascii")] = getxattr(path, key).decode("ascii")
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# Extract lease information from filesystem
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try:
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last_seen = datetime.strptime(getxattr(path, "user.lease.last_seen").decode("ascii"), "%Y-%m-%dT%H:%M:%S.%fZ")
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lease = dict(
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inner_address = getxattr(path, "user.lease.inner_address").decode("ascii"),
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outer_address = getxattr(path, "user.lease.outer_address").decode("ascii"),
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last_seen = last_seen,
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age = datetime.utcnow() - last_seen
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)
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except IOError: # No such attribute(s)
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lease = None
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try:
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signer_username = getxattr(path, "user.signature.username").decode("ascii")
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except IOError:
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signer_username = None
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# TODO: dedup
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yield dict(
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serial = "%x" % cert.serial_number,
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organizational_unit = cert.subject.native.get("organizational_unit_name"),
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common_name = common_name,
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# TODO: key type, key length, key exponent, key modulo
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signed = signed,
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expires = expires,
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sha256sum = hashlib.sha256(buf).hexdigest(),
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signer = signer_username,
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lease = lease,
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tags = tags,
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attributes = attributes or None,
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extensions = dict([
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(e["extn_id"].native, e["extn_value"].native)
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for e in cert["tbs_certificate"]["extensions"]
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if e["extn_value"] in ("extended_key_usage",)])
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)
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if req.context.get("user").is_admin():
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logger.info("Logged in authority administrator %s from %s" % (req.context.get("user"), req.context.get("remote_addr")))
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else:
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logger.info("Logged in authority user %s from %s" % (req.context.get("user"), req.context.get("remote_addr")))
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return dict(
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user = dict(
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name=req.context.get("user").name,
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gn=req.context.get("user").given_name,
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sn=req.context.get("user").surname,
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mail=req.context.get("user").mail
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),
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request_submission_allowed = config.REQUEST_SUBMISSION_ALLOWED,
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authority = dict(
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builder = dict(
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profiles = config.IMAGE_BUILDER_PROFILES
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),
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tagging = [dict(name=t[0], type=t[1], title=t[2]) for t in config.TAG_TYPES],
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lease = dict(
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offline = 600, # Seconds from last seen activity to consider lease offline, OpenVPN reneg-sec option
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dead = 604800 # Seconds from last activity to consider lease dead, X509 chain broken or machine discarded
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),
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common_name = const.FQDN,
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title = self.authority.certificate.subject.native["common_name"],
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mailer = dict(
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name = config.MAILER_NAME,
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address = config.MAILER_ADDRESS
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) if config.MAILER_ADDRESS else None,
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machine_enrollment_allowed=config.MACHINE_ENROLLMENT_ALLOWED,
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user_enrollment_allowed=config.USER_ENROLLMENT_ALLOWED,
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user_multiple_certificates=config.USER_MULTIPLE_CERTIFICATES,
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events = config.EVENT_SOURCE_SUBSCRIBE % config.EVENT_SOURCE_TOKEN,
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requests=serialize_requests(self.authority.list_requests),
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signed=serialize_certificates(self.authority.list_signed),
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revoked=serialize_revoked(self.authority.list_revoked),
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admin_users = User.objects.filter_admins(),
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user_subnets = config.USER_SUBNETS or None,
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autosign_subnets = config.AUTOSIGN_SUBNETS or None,
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request_subnets = config.REQUEST_SUBNETS or None,
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admin_subnets=config.ADMIN_SUBNETS or None,
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signature = dict(
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revocation_list_lifetime=config.REVOCATION_LIST_LIFETIME,
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profiles = [dict(name=k, server=v[0]=="server", lifetime=v[1], organizational_unit=v[2], title=v[3]) for k,v in config.PROFILES.items()]
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)
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) if req.context.get("user").is_admin() else None,
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features=dict(
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tagging=True,
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leases=True,
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logging=config.LOGGING_BACKEND))
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class StaticResource(object):
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def __init__(self, root):
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self.root = os.path.realpath(root)
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def __call__(self, req, resp):
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path = os.path.realpath(os.path.join(self.root, req.path[1:]))
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if not path.startswith(self.root):
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raise falcon.HTTPBadRequest()
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if os.path.isdir(path):
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path = os.path.join(path, "index.html")
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if os.path.exists(path):
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content_type, content_encoding = mimetypes.guess_type(path)
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if content_type:
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resp.append_header("Content-Type", content_type)
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if content_encoding:
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resp.append_header("Content-Encoding", content_encoding)
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resp.stream = open(path, "rb")
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logger.debug("Serving '%s' from '%s'", req.path, path)
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else:
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resp.status = falcon.HTTP_404
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resp.body = "File '%s' not found" % req.path
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logger.info("File '%s' not found, path resolved to '%s'", req.path, path)
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import ipaddress
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class NormalizeMiddleware(object):
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def process_request(self, req, resp, *args):
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assert not req.get_param("unicode") or req.get_param("unicode") == u"✓", "Unicode sanity check failed"
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req.context["remote_addr"] = ipaddress.ip_address(req.access_route[0])
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def certidude_app(log_handlers=[]):
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from certidude import authority, config
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from .signed import SignedCertificateDetailResource
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from .request import RequestListResource, RequestDetailResource
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from .lease import LeaseResource, LeaseDetailResource
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from .script import ScriptResource
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from .tag import TagResource, TagDetailResource
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from .attrib import AttributeResource
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from .bootstrap import BootstrapResource
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from .token import TokenResource
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from .builder import ImageBuilderResource
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app = falcon.API(middleware=NormalizeMiddleware())
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app.req_options.auto_parse_form_urlencoded = True
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#app.req_options.strip_url_path_trailing_slash = False
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# Certificate authority API calls
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app.add_route("/api/certificate/", CertificateAuthorityResource())
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app.add_route("/api/signed/{cn}/", SignedCertificateDetailResource(authority))
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app.add_route("/api/request/{cn}/", RequestDetailResource(authority))
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app.add_route("/api/request/", RequestListResource(authority))
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app.add_route("/api/", SessionResource(authority))
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if config.USER_ENROLLMENT_ALLOWED: # TODO: add token enable/disable flag for config
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app.add_route("/api/token/", TokenResource(authority))
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# Extended attributes for scripting etc.
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app.add_route("/api/signed/{cn}/attr/", AttributeResource(authority, namespace="machine"))
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app.add_route("/api/signed/{cn}/script/", ScriptResource(authority))
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# API calls used by pushed events on the JS end
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app.add_route("/api/signed/{cn}/tag/", TagResource(authority))
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app.add_route("/api/signed/{cn}/lease/", LeaseDetailResource(authority))
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# API call used to delete existing tags
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app.add_route("/api/signed/{cn}/tag/{tag}/", TagDetailResource(authority))
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# Gateways can submit leases via this API call
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app.add_route("/api/lease/", LeaseResource(authority))
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# Bootstrap resource
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app.add_route("/api/bootstrap/", BootstrapResource(authority))
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# LEDE image builder resource
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app.add_route("/api/build/{profile}/{suggested_filename}", ImageBuilderResource())
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# Add CRL handler if we have any whitelisted subnets
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if config.CRL_SUBNETS:
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from .revoked import RevocationListResource
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app.add_route("/api/revoked/", RevocationListResource(authority))
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# Add SCEP handler if we have any whitelisted subnets
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if config.SCEP_SUBNETS:
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from .scep import SCEPResource
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app.add_route("/api/scep/", SCEPResource(authority))
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# Add sink for serving static files
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app.add_sink(StaticResource(os.path.join(__file__, "..", "..", "static")))
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if config.OCSP_SUBNETS:
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from .ocsp import OCSPResource
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app.add_sink(OCSPResource(authority), prefix="/api/ocsp")
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# Set up log handlers
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if config.LOGGING_BACKEND == "sql":
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from certidude.mysqllog import LogHandler
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from certidude.api.log import LogResource
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uri = config.cp.get("logging", "database")
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log_handlers.append(LogHandler(uri))
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app.add_route("/api/log/", LogResource(uri))
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elif config.LOGGING_BACKEND == "syslog":
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from logging.handlers import SyslogHandler
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log_handlers.append(SyslogHandler())
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# Browsing syslog via HTTP is obviously not possible out of the box
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elif config.LOGGING_BACKEND:
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raise ValueError("Invalid logging.backend = %s" % config.LOGGING_BACKEND)
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return app
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