Remove unused methods from c/s api v1 in register.py (#5963)

These methods were part of the v1 C/S API. Remove them as they are no longer used by any code paths.

3 files changed, 2 insertions, 137 deletions

diff --git a/changelog.d/5963.misc b/changelog.d/5963.misc
new file mode 100644
index 0000000000..0d6c3c3d65
--- /dev/null
+++ b/changelog.d/5963.misc
@@ -0,0 +1 @@
+Remove left-over methods from C/S registration API.
\ No newline at end of file
diff --git a/synapse/handlers/register.py b/synapse/handlers/register.py
index be0425a33b..3142d85788 100644
--- a/synapse/handlers/register.py
+++ b/synapse/handlers/register.py
@@ -24,13 +24,11 @@ from synapse.api.errors import (
     AuthError,
     Codes,
     ConsentNotGivenError,
-    InvalidCaptchaError,
     LimitExceededError,
     RegistrationError,
     SynapseError,
 )
 from synapse.config.server import is_threepid_reserved
-from synapse.http.client import CaptchaServerHttpClient
 from synapse.http.servlet import assert_params_in_dict
 from synapse.replication.http.login import RegisterDeviceReplicationServlet
 from synapse.replication.http.register import (
@@ -39,7 +37,6 @@ from synapse.replication.http.register import (
 )
 from synapse.types import RoomAlias, RoomID, UserID, create_requester
 from synapse.util.async_helpers import Linearizer
-from synapse.util.threepids import check_3pid_allowed
 
 from ._base import BaseHandler
 
@@ -59,7 +56,6 @@ class RegistrationHandler(BaseHandler):
         self._auth_handler = hs.get_auth_handler()
         self.profile_handler = hs.get_profile_handler()
         self.user_directory_handler = hs.get_user_directory_handler()
-        self.captcha_client = CaptchaServerHttpClient(hs)
         self.identity_handler = self.hs.get_handlers().identity_handler
         self.ratelimiter = hs.get_registration_ratelimiter()
 
@@ -362,70 +358,6 @@ class RegistrationHandler(BaseHandler):
         )
         return user_id
 
-    @defer.inlineCallbacks
-    def check_recaptcha(self, ip, private_key, challenge, response):
-        """
-        Checks a recaptcha is correct.
-
-        Used only by c/s api v1
-        """
-
-        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.
-
-        Used only by c/s api v1
-        """
-
-        for c in threepidCreds:
-            logger.info(
-                "validating threepidcred sid %s on id server %s",
-                c["sid"],
-                c["idServer"],
-            )
-            try:
-                threepid = yield self.identity_handler.threepid_from_creds(c)
-            except Exception:
-                logger.exception("Couldn't validate 3pid")
-                raise RegistrationError(400, "Couldn't validate 3pid")
-
-            if not threepid:
-                raise RegistrationError(400, "Couldn't validate 3pid")
-            logger.info(
-                "got threepid with medium '%s' and address '%s'",
-                threepid["medium"],
-                threepid["address"],
-            )
-
-            if not check_3pid_allowed(self.hs, threepid["medium"], threepid["address"]):
-                raise RegistrationError(403, "Third party identifier is not allowed")
-
-    @defer.inlineCallbacks
-    def bind_emails(self, user_id, threepidCreds):
-        """Links emails with a user ID and informs an identity server.
-
-        Used only by c/s api v1
-        """
-
-        # Now we have a matrix ID, bind it to the threepids we were given
-        for c in threepidCreds:
-            # XXX: This should be a deferred list, shouldn't it?
-            yield self.identity_handler.bind_threepid(c, user_id)
-
     def check_user_id_not_appservice_exclusive(self, user_id, allowed_appservice=None):
         # don't allow people to register the server notices mxid
         if self._server_notices_mxid is not None:
@@ -464,42 +396,6 @@ class RegistrationHandler(BaseHandler):
         return str(id)
 
     @defer.inlineCallbacks
-    def _validate_captcha(self, ip_addr, private_key, challenge, response):
-        """Validates the captcha provided.
-
-        Used only by c/s api v1
-
-        Returns:
-            dict: Containing 'valid'(bool) and 'error_url'(str) if invalid.
-
-        """
-        response = yield self._submit_captcha(ip_addr, private_key, challenge, response)
-        # parse Google's response. Lovely format..
-        lines = response.split("\n")
-        json = {
-            "valid": lines[0] == "true",
-            "error_url": "http://www.recaptcha.net/recaptcha/api/challenge?"
-            + "error=%s" % lines[1],
-        }
-        return json
-
-    @defer.inlineCallbacks
-    def _submit_captcha(self, ip_addr, private_key, challenge, response):
-        """
-        Used only by c/s api v1
-        """
-        data = yield self.captcha_client.post_urlencoded_get_raw(
-            "http://www.recaptcha.net:80/recaptcha/api/verify",
-            args={
-                "privatekey": private_key,
-                "remoteip": ip_addr,
-                "challenge": challenge,
-                "response": response,
-            },
-        )
-        return data
-
-    @defer.inlineCallbacks
     def _join_user_to_room(self, requester, room_identifier):
         room_id = None
         room_member_handler = self.hs.get_room_member_handler()
diff --git a/synapse/http/client.py b/synapse/http/client.py
index 0ac20ebefc..0ae6db8ea7 100644
--- a/synapse/http/client.py
+++ b/synapse/http/client.py
@@ -35,7 +35,7 @@ from twisted.internet.interfaces import (
 )
 from twisted.python.failure import Failure
 from twisted.web._newclient import ResponseDone
-from twisted.web.client import Agent, HTTPConnectionPool, PartialDownloadError, readBody
+from twisted.web.client import Agent, HTTPConnectionPool, readBody
 from twisted.web.http import PotentialDataLoss
 from twisted.web.http_headers import Headers
 
@@ -599,38 +599,6 @@ def _readBodyToFile(response, stream, max_size):
     return d
 
 
-class CaptchaServerHttpClient(SimpleHttpClient):
-    """
-    Separate HTTP client for talking to google's captcha servers
-    Only slightly special because accepts partial download responses
-
-    used only by c/s api v1
-    """
-
-    @defer.inlineCallbacks
-    def post_urlencoded_get_raw(self, url, args={}):
-        query_bytes = urllib.parse.urlencode(encode_urlencode_args(args), True)
-
-        response = yield self.request(
-            "POST",
-            url,
-            data=query_bytes,
-            headers=Headers(
-                {
-                    b"Content-Type": [b"application/x-www-form-urlencoded"],
-                    b"User-Agent": [self.user_agent],
-                }
-            ),
-        )
-
-        try:
-            body = yield make_deferred_yieldable(readBody(response))
-            return body
-        except PartialDownloadError as e:
-            # twisted dislikes google's response, no content length.
-            return e.response
-
-
 def encode_urlencode_args(args):
     return {k: encode_urlencode_arg(v) for k, v in args.items()}