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-rw-r--r--synapse/rest/client/v1/login.py14
-rw-r--r--synapse/rest/client/v2_alpha/account.py208
-rw-r--r--synapse/rest/client/v2_alpha/register.py156
-rw-r--r--synapse/rest/client/versions.py19
4 files changed, 260 insertions, 137 deletions
diff --git a/synapse/rest/client/v1/login.py b/synapse/rest/client/v1/login.py
index 25a1b67092..9cddbc752a 100644
--- a/synapse/rest/client/v1/login.py
+++ b/synapse/rest/client/v1/login.py
@@ -29,6 +29,7 @@ from synapse.http.servlet import (
     parse_json_object_from_request,
     parse_string,
 )
+from synapse.http.site import SynapseRequest
 from synapse.rest.client.v2_alpha._base import client_patterns
 from synapse.rest.well_known import WellKnownBuilder
 from synapse.types import UserID, map_username_to_mxid_localpart
@@ -507,6 +508,19 @@ class SSOAuthHandler(object):
                 localpart=localpart, default_display_name=user_display_name
             )
 
+        self.complete_sso_login(registered_user_id, request, client_redirect_url)
+
+    def complete_sso_login(
+        self, registered_user_id: str, request: SynapseRequest, client_redirect_url: str
+    ):
+        """Having figured out a mxid for this user, complete the HTTP request
+
+        Args:
+            registered_user_id:
+            request:
+            client_redirect_url:
+        """
+
         login_token = self._macaroon_gen.generate_short_term_login_token(
             registered_user_id
         )
diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py
index 1139bb156c..f99676fd30 100644
--- a/synapse/rest/client/v2_alpha/account.py
+++ b/synapse/rest/client/v2_alpha/account.py
@@ -21,12 +21,7 @@ from six.moves import http_client
 from twisted.internet import defer
 
 from synapse.api.constants import LoginType
-from synapse.api.errors import (
-    Codes,
-    HttpResponseException,
-    SynapseError,
-    ThreepidValidationError,
-)
+from synapse.api.errors import Codes, SynapseError, ThreepidValidationError
 from synapse.config.emailconfig import ThreepidBehaviour
 from synapse.http.server import finish_request
 from synapse.http.servlet import (
@@ -485,10 +480,8 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
     def on_POST(self, request):
         body = parse_json_object_from_request(request)
         assert_params_in_dict(
-            body,
-            ["id_server", "client_secret", "country", "phone_number", "send_attempt"],
+            body, ["client_secret", "country", "phone_number", "send_attempt"]
         )
-        id_server = "https://" + body["id_server"]  # Assume https
         client_secret = body["client_secret"]
         country = body["country"]
         phone_number = body["phone_number"]
@@ -509,14 +502,29 @@ class MsisdnThreepidRequestTokenRestServlet(RestServlet):
         if existing_user_id is not None:
             raise SynapseError(400, "MSISDN is already in use", Codes.THREEPID_IN_USE)
 
+        if not self.hs.config.account_threepid_delegate_msisdn:
+            logger.warn(
+                "No upstream msisdn account_threepid_delegate configured on the server to "
+                "handle this request"
+            )
+            raise SynapseError(
+                400,
+                "Adding phone numbers to user account is not supported by this homeserver",
+            )
+
         ret = yield self.identity_handler.requestMsisdnToken(
-            id_server, country, phone_number, client_secret, send_attempt, next_link
+            self.hs.config.account_threepid_delegate_msisdn,
+            country,
+            phone_number,
+            client_secret,
+            send_attempt,
+            next_link,
         )
 
         return 200, ret
 
 
-class AddThreepidSubmitTokenServlet(RestServlet):
+class AddThreepidEmailSubmitTokenServlet(RestServlet):
     """Handles 3PID validation token submission for adding an email to a user's account"""
 
     PATTERNS = client_patterns(
@@ -592,6 +600,48 @@ class AddThreepidSubmitTokenServlet(RestServlet):
         finish_request(request)
 
 
+class AddThreepidMsisdnSubmitTokenServlet(RestServlet):
+    """Handles 3PID validation token submission for adding a phone number to a user's
+    account
+    """
+
+    PATTERNS = client_patterns(
+        "/add_threepid/msisdn/submit_token$", releases=(), unstable=True
+    )
+
+    def __init__(self, hs):
+        """
+        Args:
+            hs (synapse.server.HomeServer): server
+        """
+        super().__init__()
+        self.config = hs.config
+        self.clock = hs.get_clock()
+        self.store = hs.get_datastore()
+        self.identity_handler = hs.get_handlers().identity_handler
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        if not self.config.account_threepid_delegate_msisdn:
+            raise SynapseError(
+                400,
+                "This homeserver is not validating phone numbers. Use an identity server "
+                "instead.",
+            )
+
+        body = parse_json_object_from_request(request)
+        assert_params_in_dict(body, ["client_secret", "sid", "token"])
+
+        # Proxy submit_token request to msisdn threepid delegate
+        response = yield self.identity_handler.proxy_msisdn_submit_token(
+            self.config.account_threepid_delegate_msisdn,
+            body["client_secret"],
+            body["sid"],
+            body["token"],
+        )
+        return 200, response
+
+
 class ThreepidRestServlet(RestServlet):
     PATTERNS = client_patterns("/account/3pid$")
 
@@ -627,81 +677,88 @@ class ThreepidRestServlet(RestServlet):
         client_secret = threepid_creds["client_secret"]
         sid = threepid_creds["sid"]
 
-        # We don't actually know which medium this 3PID is. Thus we first assume it's email,
-        # and if validation fails we try msisdn
-        validation_session = None
-
-        # Try to validate as email
-        if self.hs.config.threepid_behaviour_email == ThreepidBehaviour.REMOTE:
-            # Ask our delegated email identity server
-            try:
-                validation_session = yield self.identity_handler.threepid_from_creds(
-                    self.hs.config.account_threepid_delegate_email, threepid_creds
-                )
-            except HttpResponseException:
-                logger.debug(
-                    "%s reported non-validated threepid: %s",
-                    self.hs.config.account_threepid_delegate_email,
-                    threepid_creds,
-                )
-        elif self.hs.config.threepid_behaviour_email == ThreepidBehaviour.LOCAL:
-            # Get a validated session matching these details
-            validation_session = yield self.datastore.get_threepid_validation_session(
-                "email", client_secret, sid=sid, validated=True
-            )
-
-        # Old versions of Sydent return a 200 http code even on a failed validation check.
-        # Thus, in addition to the HttpResponseException check above (which checks for
-        # non-200 errors), we need to make sure validation_session isn't actually an error,
-        # identified by containing an "error" key
-        # See https://github.com/matrix-org/sydent/issues/215 for details
-        if validation_session and "error" not in validation_session:
-            yield self._add_threepid_to_account(user_id, validation_session)
+        validation_session = yield self.identity_handler.validate_threepid_session(
+            client_secret, sid
+        )
+        if validation_session:
+            yield self.auth_handler.add_threepid(
+                user_id,
+                validation_session["medium"],
+                validation_session["address"],
+                validation_session["validated_at"],
+            )
             return 200, {}
 
-        # Try to validate as msisdn
-        if self.hs.config.account_threepid_delegate_msisdn:
-            # Ask our delegated msisdn identity server
-            try:
-                validation_session = yield self.identity_handler.threepid_from_creds(
-                    self.hs.config.account_threepid_delegate_msisdn, threepid_creds
-                )
-            except HttpResponseException:
-                logger.debug(
-                    "%s reported non-validated threepid: %s",
-                    self.hs.config.account_threepid_delegate_email,
-                    threepid_creds,
-                )
+        raise SynapseError(
+            400, "No validated 3pid session found", Codes.THREEPID_AUTH_FAILED
+        )
+
+
+class ThreepidAddRestServlet(RestServlet):
+    PATTERNS = client_patterns("/account/3pid/add$", releases=(), unstable=True)
+
+    def __init__(self, hs):
+        super(ThreepidAddRestServlet, self).__init__()
+        self.hs = hs
+        self.identity_handler = hs.get_handlers().identity_handler
+        self.auth = hs.get_auth()
+        self.auth_handler = hs.get_auth_handler()
+
+    @defer.inlineCallbacks
+    def on_POST(self, request):
+        requester = yield self.auth.get_user_by_req(request)
+        user_id = requester.user.to_string()
+        body = parse_json_object_from_request(request)
 
-            # Check that validation_session isn't actually an error due to old Sydent instances
-            # See explanatory comment above
-            if validation_session and "error" not in validation_session:
-                yield self._add_threepid_to_account(user_id, validation_session)
-                return 200, {}
+        assert_params_in_dict(body, ["client_secret", "sid"])
+        client_secret = body["client_secret"]
+        sid = body["sid"]
+
+        validation_session = yield self.identity_handler.validate_threepid_session(
+            client_secret, sid
+        )
+        if validation_session:
+            yield self.auth_handler.add_threepid(
+                user_id,
+                validation_session["medium"],
+                validation_session["address"],
+                validation_session["validated_at"],
+            )
+            return 200, {}
 
         raise SynapseError(
             400, "No validated 3pid session found", Codes.THREEPID_AUTH_FAILED
         )
 
+
+class ThreepidBindRestServlet(RestServlet):
+    PATTERNS = client_patterns("/account/3pid/bind$", releases=(), unstable=True)
+
+    def __init__(self, hs):
+        super(ThreepidBindRestServlet, self).__init__()
+        self.hs = hs
+        self.identity_handler = hs.get_handlers().identity_handler
+        self.auth = hs.get_auth()
+
     @defer.inlineCallbacks
-    def _add_threepid_to_account(self, user_id, validation_session):
-        """Add a threepid wrapped in a validation_session dict to an account
+    def on_POST(self, request):
+        body = parse_json_object_from_request(request)
 
-        Args:
-            user_id (str): The mxid of the user to add this 3PID to
+        assert_params_in_dict(body, ["id_server", "sid", "client_secret"])
+        id_server = body["id_server"]
+        sid = body["sid"]
+        client_secret = body["client_secret"]
+        id_access_token = body.get("id_access_token")  # optional
 
-            validation_session (dict): A dict containing the following:
-                * medium       - medium of the threepid
-                * address      - address of the threepid
-                * validated_at - timestamp of when the validation occurred
-        """
-        yield self.auth_handler.add_threepid(
-            user_id,
-            validation_session["medium"],
-            validation_session["address"],
-            validation_session["validated_at"],
+        requester = yield self.auth.get_user_by_req(request)
+        user_id = requester.user.to_string()
+
+        yield self.identity_handler.bind_threepid(
+            client_secret, sid, user_id, id_server, id_access_token
         )
 
+        return 200, {}
+
 
 class ThreepidUnbindRestServlet(RestServlet):
     PATTERNS = client_patterns("/account/3pid/unbind$", releases=(), unstable=True)
@@ -792,8 +849,11 @@ def register_servlets(hs, http_server):
     DeactivateAccountRestServlet(hs).register(http_server)
     EmailThreepidRequestTokenRestServlet(hs).register(http_server)
     MsisdnThreepidRequestTokenRestServlet(hs).register(http_server)
-    AddThreepidSubmitTokenServlet(hs).register(http_server)
+    AddThreepidEmailSubmitTokenServlet(hs).register(http_server)
+    AddThreepidMsisdnSubmitTokenServlet(hs).register(http_server)
     ThreepidRestServlet(hs).register(http_server)
+    ThreepidAddRestServlet(hs).register(http_server)
+    ThreepidBindRestServlet(hs).register(http_server)
     ThreepidUnbindRestServlet(hs).register(http_server)
     ThreepidDeleteRestServlet(hs).register(http_server)
     WhoamiRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/v2_alpha/register.py b/synapse/rest/client/v2_alpha/register.py
index e99b1f5c45..4f24a124a6 100644
--- a/synapse/rest/client/v2_alpha/register.py
+++ b/synapse/rest/client/v2_alpha/register.py
@@ -16,6 +16,7 @@
 
 import hmac
 import logging
+from typing import List, Union
 
 from six import string_types
 
@@ -31,9 +32,14 @@ from synapse.api.errors import (
     ThreepidValidationError,
     UnrecognizedRequestError,
 )
+from synapse.config import ConfigError
+from synapse.config.captcha import CaptchaConfig
+from synapse.config.consent_config import ConsentConfig
 from synapse.config.emailconfig import ThreepidBehaviour
 from synapse.config.ratelimiting import FederationRateLimitConfig
+from synapse.config.registration import RegistrationConfig
 from synapse.config.server import is_threepid_reserved
+from synapse.handlers.auth import AuthHandler
 from synapse.http.server import finish_request
 from synapse.http.servlet import (
     RestServlet,
@@ -246,6 +252,12 @@ class RegistrationSubmitTokenServlet(RestServlet):
                 [self.config.email_registration_template_failure_html],
             )
 
+        if self.config.threepid_behaviour_email == ThreepidBehaviour.LOCAL:
+            self.failure_email_template, = load_jinja2_templates(
+                self.config.email_template_dir,
+                [self.config.email_registration_template_failure_html],
+            )
+
     @defer.inlineCallbacks
     def on_GET(self, request, medium):
         if medium != "email":
@@ -365,6 +377,10 @@ class RegisterRestServlet(RestServlet):
         self.ratelimiter = hs.get_registration_ratelimiter()
         self.clock = hs.get_clock()
 
+        self._registration_flows = _calculate_registration_flows(
+            hs.config, self.auth_handler
+        )
+
     @interactive_auth_handler
     @defer.inlineCallbacks
     def on_POST(self, request):
@@ -485,69 +501,8 @@ class RegisterRestServlet(RestServlet):
                 assigned_user_id=registered_user_id,
             )
 
-        # FIXME: need a better error than "no auth flow found" for scenarios
-        # where we required 3PID for registration but the user didn't give one
-        require_email = "email" in self.hs.config.registrations_require_3pid
-        require_msisdn = "msisdn" in self.hs.config.registrations_require_3pid
-
-        show_msisdn = True
-        if self.hs.config.disable_msisdn_registration:
-            show_msisdn = False
-            require_msisdn = False
-
-        flows = []
-        if self.hs.config.enable_registration_captcha:
-            # only support 3PIDless registration if no 3PIDs are required
-            if not require_email and not require_msisdn:
-                # Also add a dummy flow here, otherwise if a client completes
-                # recaptcha first we'll assume they were going for this flow
-                # and complete the request, when they could have been trying to
-                # complete one of the flows with email/msisdn auth.
-                flows.extend([[LoginType.RECAPTCHA, LoginType.DUMMY]])
-            # only support the email-only flow if we don't require MSISDN 3PIDs
-            if not require_msisdn:
-                flows.extend([[LoginType.RECAPTCHA, LoginType.EMAIL_IDENTITY]])
-
-            if show_msisdn:
-                # only support the MSISDN-only flow if we don't require email 3PIDs
-                if not require_email:
-                    flows.extend([[LoginType.RECAPTCHA, LoginType.MSISDN]])
-                # always let users provide both MSISDN & email
-                flows.extend(
-                    [[LoginType.RECAPTCHA, LoginType.MSISDN, LoginType.EMAIL_IDENTITY]]
-                )
-        else:
-            # only support 3PIDless registration if no 3PIDs are required
-            if not require_email and not require_msisdn:
-                flows.extend([[LoginType.DUMMY]])
-            # only support the email-only flow if we don't require MSISDN 3PIDs
-            if not require_msisdn:
-                flows.extend([[LoginType.EMAIL_IDENTITY]])
-
-            if show_msisdn:
-                # only support the MSISDN-only flow if we don't require email 3PIDs
-                if not require_email or require_msisdn:
-                    flows.extend([[LoginType.MSISDN]])
-                # always let users provide both MSISDN & email
-                flows.extend([[LoginType.MSISDN, LoginType.EMAIL_IDENTITY]])
-
-        # Append m.login.terms to all flows if we're requiring consent
-        if self.hs.config.user_consent_at_registration:
-            new_flows = []
-            for flow in flows:
-                inserted = False
-                # m.login.terms should go near the end but before msisdn or email auth
-                for i, stage in enumerate(flow):
-                    if stage == LoginType.EMAIL_IDENTITY or stage == LoginType.MSISDN:
-                        flow.insert(i, LoginType.TERMS)
-                        inserted = True
-                        break
-                if not inserted:
-                    flow.append(LoginType.TERMS)
-            flows.extend(new_flows)
-
         auth_result, params, session_id = yield self.auth_handler.check_auth(
-            flows, body, self.hs.get_ip_from_request(request)
+            self._registration_flows, body, self.hs.get_ip_from_request(request)
         )
 
         # Check that we're not trying to register a denied 3pid.
@@ -710,6 +665,83 @@ class RegisterRestServlet(RestServlet):
         )
 
 
+def _calculate_registration_flows(
+    # technically `config` has to provide *all* of these interfaces, not just one
+    config: Union[RegistrationConfig, ConsentConfig, CaptchaConfig],
+    auth_handler: AuthHandler,
+) -> List[List[str]]:
+    """Get a suitable flows list for registration
+
+    Args:
+        config: server configuration
+        auth_handler: authorization handler
+
+    Returns: a list of supported flows
+    """
+    # FIXME: need a better error than "no auth flow found" for scenarios
+    # where we required 3PID for registration but the user didn't give one
+    require_email = "email" in config.registrations_require_3pid
+    require_msisdn = "msisdn" in config.registrations_require_3pid
+
+    show_msisdn = True
+    show_email = True
+
+    if config.disable_msisdn_registration:
+        show_msisdn = False
+        require_msisdn = False
+
+    enabled_auth_types = auth_handler.get_enabled_auth_types()
+    if LoginType.EMAIL_IDENTITY not in enabled_auth_types:
+        show_email = False
+        if require_email:
+            raise ConfigError(
+                "Configuration requires email address at registration, but email "
+                "validation is not configured"
+            )
+
+    if LoginType.MSISDN not in enabled_auth_types:
+        show_msisdn = False
+        if require_msisdn:
+            raise ConfigError(
+                "Configuration requires msisdn at registration, but msisdn "
+                "validation is not configured"
+            )
+
+    flows = []
+
+    # only support 3PIDless registration if no 3PIDs are required
+    if not require_email and not require_msisdn:
+        # Add a dummy step here, otherwise if a client completes
+        # recaptcha first we'll assume they were going for this flow
+        # and complete the request, when they could have been trying to
+        # complete one of the flows with email/msisdn auth.
+        flows.append([LoginType.DUMMY])
+
+    # only support the email-only flow if we don't require MSISDN 3PIDs
+    if show_email and not require_msisdn:
+        flows.append([LoginType.EMAIL_IDENTITY])
+
+    # only support the MSISDN-only flow if we don't require email 3PIDs
+    if show_msisdn and not require_email:
+        flows.append([LoginType.MSISDN])
+
+    if show_email and show_msisdn:
+        # always let users provide both MSISDN & email
+        flows.append([LoginType.MSISDN, LoginType.EMAIL_IDENTITY])
+
+    # Prepend m.login.terms to all flows if we're requiring consent
+    if config.user_consent_at_registration:
+        for flow in flows:
+            flow.insert(0, LoginType.TERMS)
+
+    # Prepend recaptcha to all flows if we're requiring captcha
+    if config.enable_registration_captcha:
+        for flow in flows:
+            flow.insert(0, LoginType.RECAPTCHA)
+
+    return flows
+
+
 def register_servlets(hs, http_server):
     EmailRegisterRequestTokenRestServlet(hs).register(http_server)
     MsisdnRegisterRequestTokenRestServlet(hs).register(http_server)
diff --git a/synapse/rest/client/versions.py b/synapse/rest/client/versions.py
index 0058b6b459..1044ae7b4e 100644
--- a/synapse/rest/client/versions.py
+++ b/synapse/rest/client/versions.py
@@ -48,7 +48,24 @@ class VersionsRestServlet(RestServlet):
                     "r0.5.0",
                 ],
                 # as per MSC1497:
-                "unstable_features": {"m.lazy_load_members": True},
+                "unstable_features": {
+                    "m.lazy_load_members": True,
+                    # as per MSC2190, as amended by MSC2264
+                    # to be removed in r0.6.0
+                    "m.id_access_token": True,
+                    # Advertise to clients that they need not include an `id_server`
+                    # parameter during registration or password reset, as Synapse now decides
+                    # itself which identity server to use (or none at all).
+                    #
+                    # This is also used by a client when they wish to bind a 3PID to their
+                    # account, but not bind it to an identity server, the endpoint for which
+                    # also requires `id_server`. If the homeserver is handling 3PID
+                    # verification itself, there is no need to ask the user for `id_server` to
+                    # be supplied.
+                    "m.require_identity_server": False,
+                    # as per MSC2290
+                    "m.separate_add_and_bind": True,
+                },
             },
         )