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-rw-r--r--synapse/handlers/identity.py272
1 files changed, 219 insertions, 53 deletions
diff --git a/synapse/handlers/identity.py b/synapse/handlers/identity.py

index c05036ad1f..c008fcf369 100644 --- a/synapse/handlers/identity.py +++ b/synapse/handlers/identity.py
@@ -1,7 +1,7 @@ # -*- coding: utf-8 -*- # Copyright 2015, 2016 OpenMarket Ltd # Copyright 2017 Vector Creations Ltd -# Copyright 2018 New Vector Ltd +# Copyright 2018, 2019 New Vector Ltd # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. @@ -22,9 +22,11 @@ import urllib.parse from typing import Awaitable, Callable, Dict, List, Optional, Tuple from synapse.api.errors import ( + AuthError, CodeMessageException, Codes, HttpResponseException, + ProxiedRequestError, SynapseError, ) from synapse.config.emailconfig import ThreepidBehaviour @@ -39,8 +41,6 @@ from ._base import BaseHandler logger = logging.getLogger(__name__) -id_server_scheme = "https://" - class IdentityHandler(BaseHandler): def __init__(self, hs): @@ -55,17 +55,20 @@ class IdentityHandler(BaseHandler): self.federation_http_client = hs.get_federation_http_client() self.hs = hs + self.rewrite_identity_server_urls = hs.config.rewrite_identity_server_urls + self._enable_lookup = hs.config.enable_3pid_lookup + self._web_client_location = hs.config.invite_client_location async def threepid_from_creds( - self, id_server: str, creds: Dict[str, str] + self, id_server_url: str, creds: Dict[str, str] ) -> Optional[JsonDict]: """ Retrieve and validate a threepid identifier from a "credentials" dictionary against a given identity server Args: - id_server: The identity server to validate 3PIDs against. Must be a + id_server_url: The identity server to validate 3PIDs against. Must be a complete URL including the protocol (http(s)://) creds: Dictionary containing the following keys: * client_secret|clientSecret: A unique secret str provided by the client @@ -90,7 +93,14 @@ class IdentityHandler(BaseHandler): query_params = {"sid": session_id, "client_secret": client_secret} - url = id_server + "/_matrix/identity/api/v1/3pid/getValidated3pid" + # if we have a rewrite rule set for the identity server, + # apply it now. + id_server_url = self.rewrite_id_server_url(id_server_url) + + url = "%s%s" % ( + id_server_url, + "/_matrix/identity/api/v1/3pid/getValidated3pid", + ) try: data = await self.http_client.get_json(url, query_params) @@ -99,7 +109,7 @@ class IdentityHandler(BaseHandler): except HttpResponseException as e: logger.info( "%s returned %i for threepid validation for: %s", - id_server, + id_server_url, e.code, creds, ) @@ -113,7 +123,7 @@ class IdentityHandler(BaseHandler): if "medium" in data: return data - logger.info("%s reported non-validated threepid: %s", id_server, creds) + logger.info("%s reported non-validated threepid: %s", id_server_url, creds) return None async def bind_threepid( @@ -145,14 +155,19 @@ class IdentityHandler(BaseHandler): if id_access_token is None: use_v2 = False + # if we have a rewrite rule set for the identity server, + # apply it now, but only for sending the request (not + # storing in the database). + id_server_url = self.rewrite_id_server_url(id_server, add_https=True) + # Decide which API endpoint URLs to use headers = {} bind_data = {"sid": sid, "client_secret": client_secret, "mxid": mxid} if use_v2: - bind_url = "https://%s/_matrix/identity/v2/3pid/bind" % (id_server,) + bind_url = "%s/_matrix/identity/v2/3pid/bind" % (id_server_url,) headers["Authorization"] = create_id_access_token_header(id_access_token) # type: ignore else: - bind_url = "https://%s/_matrix/identity/api/v1/3pid/bind" % (id_server,) + bind_url = "%s/_matrix/identity/api/v1/3pid/bind" % (id_server_url,) try: # Use the blacklisting http client as this call is only to identity servers @@ -239,9 +254,6 @@ class IdentityHandler(BaseHandler): True on success, otherwise False if the identity server doesn't support unbinding """ - url = "https://%s/_matrix/identity/api/v1/3pid/unbind" % (id_server,) - url_bytes = "/_matrix/identity/api/v1/3pid/unbind".encode("ascii") - content = { "mxid": mxid, "threepid": {"medium": threepid["medium"], "address": threepid["address"]}, @@ -250,6 +262,7 @@ class IdentityHandler(BaseHandler): # we abuse the federation http client to sign the request, but we have to send it # using the normal http client since we don't want the SRV lookup and want normal # 'browser-like' HTTPS. + url_bytes = "/_matrix/identity/api/v1/3pid/unbind".encode("ascii") auth_headers = self.federation_http_client.build_auth_headers( destination=None, method=b"POST", @@ -259,6 +272,15 @@ class IdentityHandler(BaseHandler): ) headers = {b"Authorization": auth_headers} + # if we have a rewrite rule set for the identity server, + # apply it now. + # + # Note that destination_is has to be the real id_server, not + # the server we connect to. + id_server_url = self.rewrite_id_server_url(id_server, add_https=True) + + url = "%s/_matrix/identity/api/v1/3pid/unbind" % (id_server_url,) + try: # Use the blacklisting http client as this call is only to identity servers # provided by a client @@ -373,9 +395,28 @@ class IdentityHandler(BaseHandler): return session_id + def rewrite_id_server_url(self, url: str, add_https=False) -> str: + """Given an identity server URL, optionally add a protocol scheme + before rewriting it according to the rewrite_identity_server_urls + config option + + Adds https:// to the URL if specified, then tries to rewrite the + url. Returns either the rewritten URL or the URL with optional + protocol scheme additions. + """ + rewritten_url = url + if add_https: + rewritten_url = "https://" + rewritten_url + + rewritten_url = self.rewrite_identity_server_urls.get( + rewritten_url, rewritten_url + ) + logger.debug("Rewriting identity server rule from %s to %s", url, rewritten_url) + return rewritten_url + async def requestEmailToken( self, - id_server: str, + id_server_url: str, email: str, client_secret: str, send_attempt: int, @@ -386,7 +427,7 @@ class IdentityHandler(BaseHandler): validation. Args: - id_server: The identity server to proxy to + id_server_url: The identity server to proxy to email: The email to send the message to client_secret: The unique client_secret sends by the user send_attempt: Which attempt this is @@ -400,6 +441,11 @@ class IdentityHandler(BaseHandler): "client_secret": client_secret, "send_attempt": send_attempt, } + + # if we have a rewrite rule set for the identity server, + # apply it now. + id_server_url = self.rewrite_id_server_url(id_server_url) + if next_link: params["next_link"] = next_link @@ -414,7 +460,8 @@ class IdentityHandler(BaseHandler): try: data = await self.http_client.post_json_get_json( - id_server + "/_matrix/identity/api/v1/validate/email/requestToken", + "%s/_matrix/identity/api/v1/validate/email/requestToken" + % (id_server_url,), params, ) return data @@ -426,7 +473,7 @@ class IdentityHandler(BaseHandler): async def requestMsisdnToken( self, - id_server: str, + id_server_url: str, country: str, phone_number: str, client_secret: str, @@ -437,7 +484,7 @@ class IdentityHandler(BaseHandler): Request an external server send an SMS message on our behalf for the purposes of threepid validation. Args: - id_server: The identity server to proxy to + id_server_url: The identity server to proxy to country: The country code of the phone number phone_number: The number to send the message to client_secret: The unique client_secret sends by the user @@ -465,9 +512,13 @@ class IdentityHandler(BaseHandler): "details and update your config file." ) + # if we have a rewrite rule set for the identity server, + # apply it now. + id_server_url = self.rewrite_id_server_url(id_server_url) try: data = await self.http_client.post_json_get_json( - id_server + "/_matrix/identity/api/v1/validate/msisdn/requestToken", + "%s/_matrix/identity/api/v1/validate/msisdn/requestToken" + % (id_server_url,), params, ) except HttpResponseException as e: @@ -561,6 +612,86 @@ class IdentityHandler(BaseHandler): logger.warning("Error contacting msisdn account_threepid_delegate: %s", e) raise SynapseError(400, "Error contacting the identity server") + # TODO: The following two methods are used for proxying IS requests using + # the CS API. They should be consolidated with those in RoomMemberHandler + # https://github.com/matrix-org/synapse-dinsic/issues/25 + + async def proxy_lookup_3pid( + self, id_server: str, medium: str, address: str + ) -> JsonDict: + """Looks up a 3pid in the passed identity server. + + Args: + id_server: The server name (including port, if required) + of the identity server to use. + medium: The type of the third party identifier (e.g. "email"). + address: The third party identifier (e.g. "foo@example.com"). + + Returns: + The result of the lookup. See + https://matrix.org/docs/spec/identity_service/r0.1.0.html#association-lookup + for details + """ + if not self._enable_lookup: + raise AuthError( + 403, "Looking up third-party identifiers is denied from this server" + ) + + id_server_url = self.rewrite_id_server_url(id_server, add_https=True) + + try: + data = await self.http_client.get_json( + "%s/_matrix/identity/api/v1/lookup" % (id_server_url,), + {"medium": medium, "address": address}, + ) + + except HttpResponseException as e: + logger.info("Proxied lookup failed: %r", e) + raise e.to_synapse_error() + except IOError as e: + logger.info("Failed to contact %s: %s", id_server, e) + raise ProxiedRequestError(503, "Failed to contact identity server") + + return data + + async def proxy_bulk_lookup_3pid( + self, id_server: str, threepids: List[List[str]] + ) -> JsonDict: + """Looks up given 3pids in the passed identity server. + + Args: + id_server: The server name (including port, if required) + of the identity server to use. + threepids: The third party identifiers to lookup, as + a list of 2-string sized lists ([medium, address]). + + Returns: + The result of the lookup. See + https://matrix.org/docs/spec/identity_service/r0.1.0.html#association-lookup + for details + """ + if not self._enable_lookup: + raise AuthError( + 403, "Looking up third-party identifiers is denied from this server" + ) + + id_server_url = self.rewrite_id_server_url(id_server, add_https=True) + + try: + data = await self.http_client.post_json_get_json( + "%s/_matrix/identity/api/v1/bulk_lookup" % (id_server_url,), + {"threepids": threepids}, + ) + + except HttpResponseException as e: + logger.info("Proxied lookup failed: %r", e) + raise e.to_synapse_error() + except IOError as e: + logger.info("Failed to contact %s: %s", id_server, e) + raise ProxiedRequestError(503, "Failed to contact identity server") + + return data + async def lookup_3pid( self, id_server: str, @@ -581,10 +712,13 @@ class IdentityHandler(BaseHandler): Returns: the matrix ID of the 3pid, or None if it is not recognized. """ + # Rewrite id_server URL if necessary + id_server_url = self.rewrite_id_server_url(id_server, add_https=True) + if id_access_token is not None: try: results = await self._lookup_3pid_v2( - id_server, id_access_token, medium, address + id_server_url, id_access_token, medium, address ) return results @@ -602,16 +736,17 @@ class IdentityHandler(BaseHandler): logger.warning("Error when looking up hashing details: %s", e) return None - return await self._lookup_3pid_v1(id_server, medium, address) + return await self._lookup_3pid_v1(id_server, id_server_url, medium, address) async def _lookup_3pid_v1( - self, id_server: str, medium: str, address: str + self, id_server: str, id_server_url: str, medium: str, address: str ) -> Optional[str]: """Looks up a 3pid in the passed identity server using v1 lookup. Args: id_server: The server name (including port, if required) of the identity server to use. + id_server_url: The actual, reachable domain of the id server medium: The type of the third party identifier (e.g. "email"). address: The third party identifier (e.g. "foo@example.com"). @@ -619,8 +754,8 @@ class IdentityHandler(BaseHandler): the matrix ID of the 3pid, or None if it is not recognized. """ try: - data = await self.blacklisting_http_client.get_json( - "%s%s/_matrix/identity/api/v1/lookup" % (id_server_scheme, id_server), + data = await self.http_client.get_json( + "%s/_matrix/identity/api/v1/lookup" % (id_server_url,), {"medium": medium, "address": address}, ) @@ -637,13 +772,12 @@ class IdentityHandler(BaseHandler): return None async def _lookup_3pid_v2( - self, id_server: str, id_access_token: str, medium: str, address: str + self, id_server_url: str, id_access_token: str, medium: str, address: str ) -> Optional[str]: """Looks up a 3pid in the passed identity server using v2 lookup. Args: - id_server: The server name (including port, if required) - of the identity server to use. + id_server_url: The protocol scheme and domain of the id server id_access_token: The access token to authenticate to the identity server with medium: The type of the third party identifier (e.g. "email"). address: The third party identifier (e.g. "foo@example.com"). @@ -653,8 +787,8 @@ class IdentityHandler(BaseHandler): """ # Check what hashing details are supported by this identity server try: - hash_details = await self.blacklisting_http_client.get_json( - "%s%s/_matrix/identity/v2/hash_details" % (id_server_scheme, id_server), + hash_details = await self.http_client.get_json( + "%s/_matrix/identity/v2/hash_details" % (id_server_url,), {"access_token": id_access_token}, ) except RequestTimedOutError: @@ -662,15 +796,14 @@ class IdentityHandler(BaseHandler): if not isinstance(hash_details, dict): logger.warning( - "Got non-dict object when checking hash details of %s%s: %s", - id_server_scheme, - id_server, + "Got non-dict object when checking hash details of %s: %s", + id_server_url, hash_details, ) raise SynapseError( 400, - "Non-dict object from %s%s during v2 hash_details request: %s" - % (id_server_scheme, id_server, hash_details), + "Non-dict object from %s during v2 hash_details request: %s" + % (id_server_url, hash_details), ) # Extract information from hash_details @@ -684,8 +817,8 @@ class IdentityHandler(BaseHandler): ): raise SynapseError( 400, - "Invalid hash details received from identity server %s%s: %s" - % (id_server_scheme, id_server, hash_details), + "Invalid hash details received from identity server %s: %s" + % (id_server_url, hash_details), ) # Check if any of the supported lookup algorithms are present @@ -707,7 +840,7 @@ class IdentityHandler(BaseHandler): else: logger.warning( "None of the provided lookup algorithms of %s are supported: %s", - id_server, + id_server_url, supported_lookup_algorithms, ) raise SynapseError( @@ -720,8 +853,8 @@ class IdentityHandler(BaseHandler): headers = {"Authorization": create_id_access_token_header(id_access_token)} try: - lookup_results = await self.blacklisting_http_client.post_json_get_json( - "%s%s/_matrix/identity/v2/lookup" % (id_server_scheme, id_server), + lookup_results = await self.http_client.post_json_get_json( + "%s/_matrix/identity/v2/lookup" % (id_server_url,), { "addresses": [lookup_value], "algorithm": lookup_algorithm, @@ -809,15 +942,17 @@ class IdentityHandler(BaseHandler): if self._web_client_location: invite_config["org.matrix.web_client_location"] = self._web_client_location + # Rewrite the identity server URL if necessary + id_server_url = self.rewrite_id_server_url(id_server, add_https=True) + # Add the identity service access token to the JSON body and use the v2 # Identity Service endpoints if id_access_token is present data = None - base_url = "%s%s/_matrix/identity" % (id_server_scheme, id_server) + base_url = "%s/_matrix/identity" % (id_server_url,) if id_access_token: - key_validity_url = "%s%s/_matrix/identity/v2/pubkey/isvalid" % ( - id_server_scheme, - id_server, + key_validity_url = "%s/_matrix/identity/v2/pubkey/isvalid" % ( + id_server_url, ) # Attempt a v2 lookup @@ -836,9 +971,8 @@ class IdentityHandler(BaseHandler): raise e if data is None: - key_validity_url = "%s%s/_matrix/identity/api/v1/pubkey/isvalid" % ( - id_server_scheme, - id_server, + key_validity_url = "%s/_matrix/identity/api/v1/pubkey/isvalid" % ( + id_server_url, ) url = base_url + "/api/v1/store-invite" @@ -850,10 +984,7 @@ class IdentityHandler(BaseHandler): raise SynapseError(500, "Timed out contacting identity server") except HttpResponseException as e: logger.warning( - "Error trying to call /store-invite on %s%s: %s", - id_server_scheme, - id_server, - e, + "Error trying to call /store-invite on %s: %s", id_server_url, e, ) if data is None: @@ -866,10 +997,9 @@ class IdentityHandler(BaseHandler): ) except HttpResponseException as e: logger.warning( - "Error calling /store-invite on %s%s with fallback " + "Error calling /store-invite on %s with fallback " "encoding: %s", - id_server_scheme, - id_server, + id_server_url, e, ) raise e @@ -890,6 +1020,42 @@ class IdentityHandler(BaseHandler): display_name = data["display_name"] return token, public_keys, fallback_public_key, display_name + async def bind_email_using_internal_sydent_api( + self, id_server_url: str, email: str, user_id: str, + ): + """Bind an email to a fully qualified user ID using the internal API of an + instance of Sydent. + + Args: + id_server_url: The URL of the Sydent instance + email: The email address to bind + user_id: The user ID to bind the email to + + Raises: + HTTPResponseException: On a non-2xx HTTP response. + """ + # Extract the domain name from the IS URL as we store IS domains instead of URLs + id_server = urllib.parse.urlparse(id_server_url).hostname + if not id_server: + # We were unable to determine the hostname, bail out + return + + # id_server_url is assumed to have no trailing slashes + url = id_server_url + "/_matrix/identity/internal/bind" + body = { + "address": email, + "medium": "email", + "mxid": user_id, + } + + # Bind the threepid + await self.http_client.post_json_get_json(url, body) + + # Remember where we bound the threepid + await self.store.add_user_bound_threepid( + user_id=user_id, medium="email", address=email, id_server=id_server, + ) + def create_id_access_token_header(id_access_token: str) -> List[str]: """Create an Authorization header for passing to SimpleHttpClient as the header value