diff options
Diffstat (limited to 'synapse/rest/client/v2_alpha/account.py')
| -rw-r--r-- | synapse/rest/client/v2_alpha/account.py | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/synapse/rest/client/v2_alpha/account.py b/synapse/rest/client/v2_alpha/account.py index 182a308eef..3767a809a4 100644 --- a/synapse/rest/client/v2_alpha/account.py +++ b/synapse/rest/client/v2_alpha/account.py @@ -30,7 +30,7 @@ from synapse.http.servlet import ( from synapse.push.mailer import Mailer, load_jinja2_templates from synapse.util.msisdn import phone_number_to_msisdn from synapse.util.stringutils import assert_valid_client_secret, random_string -from synapse.util.threepids import check_3pid_allowed +from synapse.util.threepids import canonicalise_email, check_3pid_allowed from ._base import client_patterns, interactive_auth_handler @@ -83,7 +83,15 @@ class EmailPasswordRequestTokenRestServlet(RestServlet): client_secret = body["client_secret"] assert_valid_client_secret(client_secret) - email = body["email"] + # Canonicalise the email address. The addresses are all stored canonicalised + # in the database. This allows the user to reset his password without having to + # know the exact spelling (eg. upper and lower case) of address in the database. + # Stored in the database "foo@bar.com" + # User requests with "FOO@bar.com" would raise a Not Found error + try: + email = canonicalise_email(body["email"]) + except ValueError as e: + raise SynapseError(400, str(e)) send_attempt = body["send_attempt"] next_link = body.get("next_link") # Optional param @@ -94,6 +102,10 @@ class EmailPasswordRequestTokenRestServlet(RestServlet): Codes.THREEPID_DENIED, ) + # The email will be sent to the stored address. + # This avoids a potential account hijack by requesting a password reset to + # an email address which is controlled by the attacker but which, after + # canonicalisation, matches the one in our database. existing_user_id = await self.hs.get_datastore().get_user_id_by_threepid( "email", email ) @@ -274,10 +286,13 @@ class PasswordRestServlet(RestServlet): if "medium" not in threepid or "address" not in threepid: raise SynapseError(500, "Malformed threepid") if threepid["medium"] == "email": - # For emails, transform the address to lowercase. - # We store all email addreses as lowercase in the DB. + # For emails, canonicalise the address. + # We store all email addresses canonicalised in the DB. # (See add_threepid in synapse/handlers/auth.py) - threepid["address"] = threepid["address"].lower() + try: + threepid["address"] = canonicalise_email(threepid["address"]) + except ValueError as e: + raise SynapseError(400, str(e)) # if using email, we must know about the email they're authing with! threepid_user_id = await self.datastore.get_user_id_by_threepid( threepid["medium"], threepid["address"] @@ -392,7 +407,16 @@ class EmailThreepidRequestTokenRestServlet(RestServlet): client_secret = body["client_secret"] assert_valid_client_secret(client_secret) - email = body["email"] + # Canonicalise the email address. The addresses are all stored canonicalised + # in the database. + # This ensures that the validation email is sent to the canonicalised address + # as it will later be entered into the database. + # Otherwise the email will be sent to "FOO@bar.com" and stored as + # "foo@bar.com" in database. + try: + email = canonicalise_email(body["email"]) + except ValueError as e: + raise SynapseError(400, str(e)) send_attempt = body["send_attempt"] next_link = body.get("next_link") # Optional param @@ -403,9 +427,7 @@ class EmailThreepidRequestTokenRestServlet(RestServlet): Codes.THREEPID_DENIED, ) - existing_user_id = await self.store.get_user_id_by_threepid( - "email", body["email"] - ) + existing_user_id = await self.store.get_user_id_by_threepid("email", email) if existing_user_id is not None: if self.config.request_token_inhibit_3pid_errors: |