Split out password/captcha/email logic.

This commit is contained in:
Kegan Dougal 2014-09-15 12:42:36 +01:00
parent 34878bc26a
commit 285ecaacd0
2 changed files with 220 additions and 143 deletions

View File

@ -40,8 +40,7 @@ class RegistrationHandler(BaseHandler):
self.distributor.declare("registered_user")
@defer.inlineCallbacks
def register(self, localpart=None, password=None, threepidCreds=None,
captcha_info={}):
def register(self, localpart=None, password=None):
"""Registers a new client on the server.
Args:
@ -54,37 +53,6 @@ class RegistrationHandler(BaseHandler):
Raises:
RegistrationError if there was a problem registering.
"""
if captcha_info:
captcha_response = yield self._validate_captcha(
captcha_info["ip"],
captcha_info["private_key"],
captcha_info["challenge"],
captcha_info["response"]
)
if not captcha_response["valid"]:
logger.info("Invalid captcha entered from %s. Error: %s",
captcha_info["ip"], captcha_response["error_url"])
raise InvalidCaptchaError(
error_url=captcha_response["error_url"]
)
else:
logger.info("Valid captcha entered from %s", captcha_info["ip"])
if threepidCreds:
for c in threepidCreds:
logger.info("validating theeepidcred sid %s on id server %s",
c['sid'], c['idServer'])
try:
threepid = yield self._threepid_from_creds(c)
except:
logger.err()
raise RegistrationError(400, "Couldn't validate 3pid")
if not threepid:
raise RegistrationError(400, "Couldn't validate 3pid")
logger.info("got threepid medium %s address %s",
threepid['medium'], threepid['address'])
password_hash = None
if password:
password_hash = bcrypt.hashpw(password, bcrypt.gensalt())
@ -126,15 +94,54 @@ class RegistrationHandler(BaseHandler):
raise RegistrationError(
500, "Cannot generate user ID.")
defer.returnValue((user_id, token))
@defer.inlineCallbacks
def check_recaptcha(self, ip, private_key, challenge, response):
"""Checks a recaptcha is correct."""
captcha_response = yield self._validate_captcha(
ip,
private_key,
challenge,
response
)
if not captcha_response["valid"]:
logger.info("Invalid captcha entered from %s. Error: %s",
ip, captcha_response["error_url"])
raise InvalidCaptchaError(
error_url=captcha_response["error_url"]
)
else:
logger.info("Valid captcha entered from %s", ip)
@defer.inlineCallbacks
def register_email(self, threepidCreds):
"""Registers emails with an identity server."""
for c in threepidCreds:
logger.info("validating theeepidcred sid %s on id server %s",
c['sid'], c['idServer'])
try:
threepid = yield self._threepid_from_creds(c)
except:
logger.err()
raise RegistrationError(400, "Couldn't validate 3pid")
if not threepid:
raise RegistrationError(400, "Couldn't validate 3pid")
logger.info("got threepid medium %s address %s",
threepid['medium'], threepid['address'])
@defer.inlineCallbacks
def bind_emails(self, user_id, threepidCreds):
"""Links emails with a user ID and informs an identity server."""
# Now we have a matrix ID, bind it to the threepids we were given
if threepidCreds:
for c in threepidCreds:
# XXX: This should be a deferred list, shouldn't it?
yield self._bind_threepid(c, user_id)
defer.returnValue((user_id, token))
def _generate_token(self, user_id):
# urlsafe variant uses _ and - so use . as the separator and replace
# all =s with .s so http clients don't quote =s when it is used as
@ -200,7 +207,8 @@ class RegistrationHandler(BaseHandler):
data = yield client.post_urlencoded_get_raw(
"www.google.com:80",
"/recaptcha/api/verify",
accept_partial=True, # twisted dislikes google's response, no content length.
# twisted dislikes google's response, no content length.
accept_partial=True,
args={
'privatekey': private_key,
'remoteip': ip_addr,

View File

@ -19,26 +19,60 @@ from twisted.internet import defer
from synapse.api.errors import SynapseError, Codes
from synapse.api.constants import LoginType
from base import RestServlet, client_path_pattern
import synapse.util.stringutils as stringutils
import json
import logging
import urllib
logger = logging.getLogger(__name__)
class RegisterRestServlet(RestServlet):
"""Handles registration with the home server.
This servlet is in control of the registration flow; the registration
handler doesn't have a concept of multi-stages or sessions.
"""
PATTERN = client_path_pattern("/register$")
def __init__(self, hs):
super(RegisterRestServlet, self).__init__(hs)
# sessions are stored as:
# self.sessions = {
# "session_id" : { __session_dict__ }
# }
# TODO: persistent storage
self.sessions = {}
def on_GET(self, request):
if self.hs.config.enable_registration_captcha:
return (200, {
"flows": [
{
"type": LoginType.RECAPTCHA,
"stages": ([LoginType.RECAPTCHA, LoginType.EMAIL_IDENTITY,
"stages": ([LoginType.RECAPTCHA,
LoginType.EMAIL_IDENTITY,
LoginType.PASSWORD])
},
{
"type": LoginType.RECAPTCHA,
"stages": [LoginType.RECAPTCHA, LoginType.PASSWORD]
}
]
})
else:
return (200, {
"flows": [
{
"type": LoginType.EMAIL_IDENTITY,
"stages": ([LoginType.EMAIL_IDENTITY,
LoginType.PASSWORD])
},
{
"type": LoginType.PASSWORD
}
]
})
@ -56,51 +90,63 @@ class RegisterRestServlet(RestServlet):
LoginType.EMAIL_IDENTITY: self._do_email_identity
}
session_info = None
if session:
session_info = self._get_session_info(session)
session_info = self._get_session_info(request, session)
logger.debug("%s : session info %s request info %s",
login_type, session_info, register_json)
response = yield stages[login_type](
request,
register_json,
session_info
)
if "access_token" not in response:
# isn't a final response
response["session"] = session_info["id"]
response = yield stages[login_type](register_json, session_info)
defer.returnValue((200, response))
except KeyError:
raise SynapseError(400, "Bad login type.")
except KeyError as e:
logger.exception(e)
raise SynapseError(400, "Missing JSON keys or bad login type.")
def on_OPTIONS(self, request):
return (200, {})
desired_user_id = None
password = None
def _get_session_info(self, request, session_id):
if not session_id:
# create a new session
while session_id is None or session_id in self.sessions:
session_id = stringutils.random_string(24)
self.sessions[session_id] = {
"id": session_id,
LoginType.EMAIL_IDENTITY: False,
LoginType.RECAPTCHA: False
}
if "password" in register_json:
password = register_json["password"].encode("utf-8")
return self.sessions[session_id]
if ("user_id" in register_json and
type(register_json["user_id"]) == unicode):
desired_user_id = register_json["user_id"].encode("utf-8")
if urllib.quote(desired_user_id) != desired_user_id:
raise SynapseError(
400,
"User ID must only contain characters which do not " +
"require URL encoding.")
def _save_session(self, session):
# TODO: Persistent storage
logger.debug("Saving session %s", session)
self.sessions[session["id"]] = session
threepidCreds = None
if 'threepidCreds' in register_json:
threepidCreds = register_json['threepidCreds']
def _remove_session(self, session):
logger.debug("Removing session %s", session)
self.sessions.pop(session["id"])
def _do_recaptcha(self, request, register_json, session):
if not self.hs.config.enable_registration_captcha:
raise SynapseError(400, "Captcha not required.")
captcha = {}
if self.hs.config.enable_registration_captcha:
challenge = None
user_response = None
try:
captcha_type = register_json["captcha"]["type"]
if captcha_type != "m.login.recaptcha":
raise SynapseError(400, "Sorry, only m.login.recaptcha " +
"requests are supported.")
challenge = register_json["captcha"]["challenge"]
user_response = register_json["captcha"]["response"]
challenge = register_json["challenge"]
user_response = register_json["response"]
except KeyError:
raise SynapseError(400, "Captcha response is required",
errcode=Codes.CAPTCHA_NEEDED)
# TODO determine the source IP : May be an X-Forwarding-For header depending on config
# May be an X-Forwarding-For header depending on config
ip_addr = request.getClientIP()
if self.hs.config.captcha_ip_origin_is_x_forwarded:
# use the header
@ -108,44 +154,66 @@ class RegisterRestServlet(RestServlet):
ip_addr = request.requestHeaders.getRawHeaders(
"X-Forwarded-For")[0]
captcha = {
"ip": ip_addr,
"private_key": self.hs.config.recaptcha_private_key,
"challenge": challenge,
"response": user_response
}
handler = self.handlers.registration_handler
yield handler.check_recaptcha(
ip_addr,
self.hs.config.recaptcha_private_key,
challenge,
user_response
)
session[LoginType.RECAPTCHA] = True # mark captcha as done
self._save_session(session)
defer.returnValue({
"next": [LoginType.PASSWORD, LoginType.EMAIL_IDENTITY]
})
@defer.inlineCallbacks
def _do_email_identity(self, request, register_json, session):
if (self.hs.config.enable_registration_captcha and
not session[LoginType.RECAPTCHA]):
raise SynapseError(400, "Captcha is required.")
threepidCreds = register_json['threepidCreds']
handler = self.handlers.registration_handler
yield handler.register_email(threepidCreds)
session["threepidCreds"] = threepidCreds # store creds for next stage
session[LoginType.EMAIL_IDENTITY] = True # mark email as done
self._save_session(session)
defer.returnValue({
"next": LoginType.PASSWORD
})
@defer.inlineCallbacks
def _do_password(self, request, register_json, session):
if (self.hs.config.enable_registration_captcha and
not session[LoginType.RECAPTCHA]):
# captcha should've been done by this stage!
raise SynapseError(400, "Captcha is required.")
password = register_json["password"].encode("utf-8")
desired_user_id = (register_json["user_id"].encode("utf-8") if "user_id"
in register_json else None)
if desired_user_id and urllib.quote(desired_user_id) != desired_user_id:
raise SynapseError(
400,
"User ID must only contain characters which do not " +
"require URL encoding.")
handler = self.handlers.registration_handler
(user_id, token) = yield handler.register(
localpart=desired_user_id,
password=password,
threepidCreds=threepidCreds,
captcha_info=captcha)
password=password
)
if session[LoginType.EMAIL_IDENTITY]:
yield handler.bind_emails(user_id, session["threepidCreds"])
result = {
"user_id": user_id,
"access_token": token,
"home_server": self.hs.hostname,
}
defer.returnValue(
(200, result)
)
def on_OPTIONS(self, request):
return (200, {})
def _get_session_info(self, session_id):
pass
def _do_recaptcha(self, register_json, session):
pass
def _do_email_identity(self, register_json, session):
pass
def _do_password(self, register_json, session):
pass
self._remove_session(session)
defer.returnValue(result)
def _parse_json(request):
@ -157,5 +225,6 @@ def _parse_json(request):
except ValueError:
raise SynapseError(400, "Content not JSON.")
def register_servlets(hs, http_server):
RegisterRestServlet(hs).register(http_server)