diff options
Diffstat (limited to 'synapse/handlers/identity.py')
| -rw-r--r-- | synapse/handlers/identity.py | 370 |
1 files changed, 289 insertions, 81 deletions
diff --git a/synapse/handlers/identity.py b/synapse/handlers/identity.py index d199521b58..512f38e5a6 100644 --- a/synapse/handlers/identity.py +++ b/synapse/handlers/identity.py @@ -29,6 +29,7 @@ from synapse.api.errors import ( HttpResponseException, SynapseError, ) +from synapse.util.stringutils import random_string from ._base import BaseHandler @@ -41,86 +42,130 @@ class IdentityHandler(BaseHandler): self.http_client = hs.get_simple_http_client() self.federation_http_client = hs.get_http_client() + self.hs = hs - self.trusted_id_servers = set(hs.config.trusted_third_party_id_servers) - self.trust_any_id_server_just_for_testing_do_not_use = ( - hs.config.use_insecure_ssl_client_just_for_testing_do_not_use - ) + def _extract_items_from_creds_dict(self, creds): + """ + Retrieve entries from a "credentials" dictionary - def _should_trust_id_server(self, id_server): - if id_server not in self.trusted_id_servers: - if self.trust_any_id_server_just_for_testing_do_not_use: - logger.warn( - "Trusting untrustworthy ID server %r even though it isn't" - " in the trusted id list for testing because" - " 'use_insecure_ssl_client_just_for_testing_do_not_use'" - " is set in the config", - id_server, - ) - else: - return False - return True + Args: + creds (dict[str, str]): Dictionary of credentials that contain the following keys: + * client_secret|clientSecret: A unique secret str provided by the client + * id_server|idServer: the domain of the identity server to query + * id_access_token: The access token to authenticate to the identity + server with. + + Returns: + tuple(str, str, str|None): A tuple containing the client_secret, the id_server, + and the id_access_token value if available. + """ + client_secret = creds.get("client_secret") or creds.get("clientSecret") + if not client_secret: + raise SynapseError( + 400, "No client_secret in creds", errcode=Codes.MISSING_PARAM + ) + + id_server = creds.get("id_server") or creds.get("idServer") + if not id_server: + raise SynapseError( + 400, "No id_server in creds", errcode=Codes.MISSING_PARAM + ) + + id_access_token = creds.get("id_access_token") + return client_secret, id_server, id_access_token @defer.inlineCallbacks - def threepid_from_creds(self, creds): - if "id_server" in creds: - id_server = creds["id_server"] - elif "idServer" in creds: - id_server = creds["idServer"] - else: - raise SynapseError(400, "No id_server in creds") + def threepid_from_creds(self, id_server, creds): + """ + Retrieve and validate a threepid identifier from a "credentials" dictionary against a + given identity server - if "client_secret" in creds: - client_secret = creds["client_secret"] - elif "clientSecret" in creds: - client_secret = creds["clientSecret"] - else: - raise SynapseError(400, "No client_secret in creds") + Args: + id_server (str|None): The identity server to validate 3PIDs against. If None, + we will attempt to extract id_server creds - if not self._should_trust_id_server(id_server): - logger.warn( - "%s is not a trusted ID server: rejecting 3pid " + "credentials", - id_server, - ) - return None + creds (dict[str, str]): Dictionary containing the following keys: + * id_server|idServer: An optional domain name of an identity server + * client_secret|clientSecret: A unique secret str provided by the client + * sid: The ID of the validation session - try: - data = yield self.http_client.get_json( - "https://%s%s" - % (id_server, "/_matrix/identity/api/v1/3pid/getValidated3pid"), - {"sid": creds["sid"], "client_secret": client_secret}, + Returns: + Deferred[dict[str,str|int]|None]: A dictionary consisting of response params to + the /getValidated3pid endpoint of the Identity Service API, or None if the + threepid was not found + """ + client_secret = creds.get("client_secret") or creds.get("clientSecret") + if not client_secret: + raise SynapseError( + 400, "Missing param client_secret in creds", errcode=Codes.MISSING_PARAM ) - except HttpResponseException as e: - logger.info("getValidated3pid failed with Matrix error: %r", e) - raise e.to_synapse_error() + session_id = creds.get("sid") + if not session_id: + raise SynapseError( + 400, "Missing param session_id in creds", errcode=Codes.MISSING_PARAM + ) + if not id_server: + # Attempt to get the id_server from the creds dict + id_server = creds.get("id_server") or creds.get("idServer") + if not id_server: + raise SynapseError( + 400, "Missing param id_server in creds", errcode=Codes.MISSING_PARAM + ) - if "medium" in data: - return data - return None + query_params = {"sid": session_id, "client_secret": client_secret} + + url = "https://%s%s" % ( + id_server, + "/_matrix/identity/api/v1/3pid/getValidated3pid", + ) + + data = yield self.http_client.get_json(url, query_params) + return data if "medium" in data else None @defer.inlineCallbacks - def bind_threepid(self, creds, mxid): + def bind_threepid(self, creds, mxid, use_v2=True): + """Bind a 3PID to an identity server + + Args: + creds (dict[str, str]): Dictionary of credentials that contain the following keys: + * client_secret|clientSecret: A unique secret str provided by the client + * id_server|idServer: the domain of the identity server to query + * id_access_token: The access token to authenticate to the identity + server with. Required if use_v2 is true + mxid (str): The MXID to bind the 3PID to + use_v2 (bool): Whether to use v2 Identity Service API endpoints + + Returns: + Deferred[dict]: The response from the identity server + """ logger.debug("binding threepid %r to %s", creds, mxid) - data = None - if "id_server" in creds: - id_server = creds["id_server"] - elif "idServer" in creds: - id_server = creds["idServer"] - else: - raise SynapseError(400, "No id_server in creds") + client_secret, id_server, id_access_token = self._extract_items_from_creds_dict( + creds + ) - if "client_secret" in creds: - client_secret = creds["client_secret"] - elif "clientSecret" in creds: - client_secret = creds["clientSecret"] + sid = creds.get("sid") + if not sid: + raise SynapseError( + 400, "No sid in three_pid_creds", errcode=Codes.MISSING_PARAM + ) + + # If an id_access_token is not supplied, force usage of v1 + if id_access_token is None: + use_v2 = False + + # 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,) + headers["Authorization"] = create_id_access_token_header(id_access_token) else: - raise SynapseError(400, "No client_secret in creds") + bind_url = "https://%s/_matrix/identity/api/v1/3pid/bind" % (id_server,) try: data = yield self.http_client.post_json_get_json( - "https://%s%s" % (id_server, "/_matrix/identity/api/v1/3pid/bind"), - {"sid": creds["sid"], "client_secret": client_secret, "mxid": mxid}, + bind_url, bind_data, headers=headers ) logger.debug("bound threepid %r to %s", creds, mxid) @@ -131,13 +176,23 @@ class IdentityHandler(BaseHandler): address=data["address"], id_server=id_server, ) + + return data + except HttpResponseException as e: + if e.code != 404 or not use_v2: + logger.error("3PID bind failed with Matrix error: %r", e) + raise e.to_synapse_error() except CodeMessageException as e: data = json.loads(e.msg) # XXX WAT? - return data + return data + + logger.info("Got 404 when POSTing JSON %s, falling back to v1 URL", bind_url) + return (yield self.bind_threepid(creds, mxid, use_v2=False)) @defer.inlineCallbacks def try_unbind_threepid(self, mxid, threepid): - """Removes a binding from an identity server + """Attempt to remove a 3PID from an identity server, or if one is not provided, all + identity servers we're aware the binding is present on Args: mxid (str): Matrix user ID of binding to be removed @@ -188,6 +243,8 @@ class IdentityHandler(BaseHandler): 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"]}, @@ -199,7 +256,7 @@ class IdentityHandler(BaseHandler): auth_headers = self.federation_http_client.build_auth_headers( destination=None, method="POST", - url_bytes="/_matrix/identity/api/v1/3pid/unbind".encode("ascii"), + url_bytes=url_bytes, content=content, destination_is=id_server, ) @@ -227,27 +284,121 @@ class IdentityHandler(BaseHandler): return changed @defer.inlineCallbacks + def send_threepid_validation( + self, + email_address, + client_secret, + send_attempt, + send_email_func, + next_link=None, + ): + """Send a threepid validation email for password reset or + registration purposes + + Args: + email_address (str): The user's email address + client_secret (str): The provided client secret + send_attempt (int): Which send attempt this is + send_email_func (func): A function that takes an email address, token, + client_secret and session_id, sends an email + and returns a Deferred. + next_link (str|None): The URL to redirect the user to after validation + + Returns: + The new session_id upon success + + Raises: + SynapseError is an error occurred when sending the email + """ + # Check that this email/client_secret/send_attempt combo is new or + # greater than what we've seen previously + session = yield self.store.get_threepid_validation_session( + "email", client_secret, address=email_address, validated=False + ) + + # Check to see if a session already exists and that it is not yet + # marked as validated + if session and session.get("validated_at") is None: + session_id = session["session_id"] + last_send_attempt = session["last_send_attempt"] + + # Check that the send_attempt is higher than previous attempts + if send_attempt <= last_send_attempt: + # If not, just return a success without sending an email + return session_id + else: + # An non-validated session does not exist yet. + # Generate a session id + session_id = random_string(16) + + # Generate a new validation token + token = random_string(32) + + # Send the mail with the link containing the token, client_secret + # and session_id + try: + yield send_email_func(email_address, token, client_secret, session_id) + except Exception: + logger.exception( + "Error sending threepid validation email to %s", email_address + ) + raise SynapseError(500, "An error was encountered when sending the email") + + token_expires = ( + self.hs.clock.time_msec() + self.hs.config.email_validation_token_lifetime + ) + + yield self.store.start_or_continue_validation_session( + "email", + email_address, + session_id, + client_secret, + send_attempt, + next_link, + token, + token_expires, + ) + + return session_id + + @defer.inlineCallbacks def requestEmailToken( self, id_server, email, client_secret, send_attempt, next_link=None ): - if not self._should_trust_id_server(id_server): - raise SynapseError( - 400, "Untrusted ID server '%s'" % id_server, Codes.SERVER_NOT_TRUSTED - ) + """ + Request an external server send an email on our behalf for the purposes of threepid + validation. + + Args: + id_server (str): The identity server to proxy to + email (str): The email to send the message to + client_secret (str): The unique client_secret sends by the user + send_attempt (int): Which attempt this is + next_link: A link to redirect the user to once they submit the token + Returns: + The json response body from the server + """ params = { "email": email, "client_secret": client_secret, "send_attempt": send_attempt, } - if next_link: - params.update({"next_link": next_link}) + params["next_link"] = next_link + + if self.hs.config.using_identity_server_from_trusted_list: + # Warn that a deprecated config option is in use + logger.warn( + 'The config option "trust_identity_server_for_password_resets" ' + 'has been replaced by "account_threepid_delegate". ' + "Please consult the sample config at docs/sample_config.yaml for " + "details and update your config file." + ) try: data = yield self.http_client.post_json_get_json( - "https://%s%s" - % (id_server, "/_matrix/identity/api/v1/validate/email/requestToken"), + id_server + "/_matrix/identity/api/v1/validate/email/requestToken", params, ) return data @@ -257,28 +408,85 @@ class IdentityHandler(BaseHandler): @defer.inlineCallbacks def requestMsisdnToken( - self, id_server, country, phone_number, client_secret, send_attempt, **kwargs + self, + id_server, + country, + phone_number, + client_secret, + send_attempt, + next_link=None, ): - if not self._should_trust_id_server(id_server): - raise SynapseError( - 400, "Untrusted ID server '%s'" % id_server, Codes.SERVER_NOT_TRUSTED - ) + """ + Request an external server send an SMS message on our behalf for the purposes of + threepid validation. + Args: + id_server (str): The identity server to proxy to + country (str): The country code of the phone number + phone_number (str): The number to send the message to + client_secret (str): The unique client_secret sends by the user + send_attempt (int): Which attempt this is + next_link: A link to redirect the user to once they submit the token + Returns: + The json response body from the server + """ params = { "country": country, "phone_number": phone_number, "client_secret": client_secret, "send_attempt": send_attempt, } - params.update(kwargs) + if next_link: + params["next_link"] = next_link + + if self.hs.config.using_identity_server_from_trusted_list: + # Warn that a deprecated config option is in use + logger.warn( + 'The config option "trust_identity_server_for_password_resets" ' + 'has been replaced by "account_threepid_delegate". ' + "Please consult the sample config at docs/sample_config.yaml for " + "details and update your config file." + ) try: data = yield self.http_client.post_json_get_json( - "https://%s%s" - % (id_server, "/_matrix/identity/api/v1/validate/msisdn/requestToken"), + id_server + "/_matrix/identity/api/v1/validate/msisdn/requestToken", params, ) return data except HttpResponseException as e: logger.info("Proxied requestToken failed: %r", e) raise e.to_synapse_error() + + +def create_id_access_token_header(id_access_token): + """Create an Authorization header for passing to SimpleHttpClient as the header value + of an HTTP request. + + Args: + id_access_token (str): An identity server access token. + + Returns: + list[str]: The ascii-encoded bearer token encased in a list. + """ + # Prefix with Bearer + bearer_token = "Bearer %s" % id_access_token + + # Encode headers to standard ascii + bearer_token.encode("ascii") + + # Return as a list as that's how SimpleHttpClient takes header values + return [bearer_token] + + +class LookupAlgorithm: + """ + Supported hashing algorithms when performing a 3PID lookup. + + SHA256 - Hashing an (address, medium, pepper) combo with sha256, then url-safe base64 + encoding + NONE - Not performing any hashing. Simply sending an (address, medium) combo in plaintext + """ + + SHA256 = "sha256" + NONE = "none" |