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https://github.com/element-hq/synapse
synced 2024-08-19 19:40:20 +00:00
Refactor login flow
Make sure that we have the canonical user_id *before* calling get_login_tuple_for_user_id. Replace login_with_password with a method which just validates the password, and have the caller call get_login_tuple_for_user_id. This brings the password flow into line with the other flows, and will give us a place to register the device_id if necessary.
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6344db659f
commit
dcfd71aa4c
2 changed files with 82 additions and 65 deletions
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@ -230,7 +230,6 @@ class AuthHandler(BaseHandler):
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sess = self._get_session_info(session_id)
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return sess.setdefault('serverdict', {}).get(key, default)
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@defer.inlineCallbacks
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def _check_password_auth(self, authdict, _):
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if "user" not in authdict or "password" not in authdict:
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raise LoginError(400, "", Codes.MISSING_PARAM)
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@ -240,11 +239,7 @@ class AuthHandler(BaseHandler):
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if not user_id.startswith('@'):
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user_id = UserID.create(user_id, self.hs.hostname).to_string()
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if not (yield self._check_password(user_id, password)):
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logger.warn("Failed password login for user %s", user_id)
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raise LoginError(403, "", errcode=Codes.FORBIDDEN)
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defer.returnValue(user_id)
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return self._check_password(user_id, password)
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@defer.inlineCallbacks
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def _check_recaptcha(self, authdict, clientip):
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@ -348,67 +343,66 @@ class AuthHandler(BaseHandler):
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return self.sessions[session_id]
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@defer.inlineCallbacks
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def login_with_password(self, user_id, password):
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def validate_password_login(self, user_id, password):
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"""
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Authenticates the user with their username and password.
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Used only by the v1 login API.
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Args:
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user_id (str): User ID
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user_id (str): complete @user:id
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password (str): Password
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Returns:
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A tuple of:
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The user's ID.
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The access token for the user's session.
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The refresh token for the user's session.
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defer.Deferred: (str) canonical user id
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Raises:
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StoreError if there was a problem storing the token.
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StoreError if there was a problem accessing the database
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LoginError if there was an authentication problem.
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"""
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if not (yield self._check_password(user_id, password)):
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logger.warn("Failed password login for user %s", user_id)
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raise LoginError(403, "", errcode=Codes.FORBIDDEN)
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logger.info("Logging in user %s", user_id)
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access_token = yield self.issue_access_token(user_id)
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refresh_token = yield self.issue_refresh_token(user_id)
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defer.returnValue((user_id, access_token, refresh_token))
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return self._check_password(user_id, password)
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@defer.inlineCallbacks
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def get_login_tuple_for_user_id(self, user_id):
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"""
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Gets login tuple for the user with the given user ID.
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Creates a new access/refresh token for the user.
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The user is assumed to have been authenticated by some other
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machanism (e.g. CAS)
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machanism (e.g. CAS), and the user_id converted to the canonical case.
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Args:
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user_id (str): User ID
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user_id (str): canonical User ID
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Returns:
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A tuple of:
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The user's ID.
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The access token for the user's session.
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The refresh token for the user's session.
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Raises:
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StoreError if there was a problem storing the token.
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LoginError if there was an authentication problem.
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"""
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user_id, ignored = yield self._find_user_id_and_pwd_hash(user_id)
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logger.info("Logging in user %s", user_id)
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access_token = yield self.issue_access_token(user_id)
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refresh_token = yield self.issue_refresh_token(user_id)
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defer.returnValue((user_id, access_token, refresh_token))
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defer.returnValue((access_token, refresh_token))
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@defer.inlineCallbacks
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def does_user_exist(self, user_id):
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def check_user_exists(self, user_id):
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"""
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Checks to see if a user with the given id exists. Will check case
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insensitively, but return None if there are multiple inexact matches.
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Args:
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(str) user_id: complete @user:id
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Returns:
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defer.Deferred: (str) canonical_user_id, or None if zero or
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multiple matches
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"""
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try:
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yield self._find_user_id_and_pwd_hash(user_id)
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defer.returnValue(True)
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res = yield self._find_user_id_and_pwd_hash(user_id)
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defer.returnValue(res[0])
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except LoginError:
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defer.returnValue(False)
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defer.returnValue(None)
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@defer.inlineCallbacks
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def _find_user_id_and_pwd_hash(self, user_id):
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@ -438,27 +432,45 @@ class AuthHandler(BaseHandler):
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@defer.inlineCallbacks
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def _check_password(self, user_id, password):
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"""
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"""Authenticate a user against the LDAP and local databases.
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user_id is checked case insensitively against the local database, but
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will throw if there are multiple inexact matches.
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Args:
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user_id (str): complete @user:id
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Returns:
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True if the user_id successfully authenticated
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(str) the canonical_user_id
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Raises:
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LoginError if the password was incorrect
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"""
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valid_ldap = yield self._check_ldap_password(user_id, password)
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if valid_ldap:
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defer.returnValue(True)
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defer.returnValue(user_id)
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valid_local_password = yield self._check_local_password(user_id, password)
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if valid_local_password:
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defer.returnValue(True)
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defer.returnValue(False)
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result = yield self._check_local_password(user_id, password)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def _check_local_password(self, user_id, password):
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try:
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user_id, password_hash = yield self._find_user_id_and_pwd_hash(user_id)
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defer.returnValue(self.validate_hash(password, password_hash))
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except LoginError:
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defer.returnValue(False)
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"""Authenticate a user against the local password database.
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user_id is checked case insensitively, but will throw if there are
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multiple inexact matches.
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Args:
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user_id (str): complete @user:id
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Returns:
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(str) the canonical_user_id
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Raises:
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LoginError if the password was incorrect
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"""
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user_id, password_hash = yield self._find_user_id_and_pwd_hash(user_id)
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result = self.validate_hash(password, password_hash)
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if not result:
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logger.warn("Failed password login for user %s", user_id)
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raise LoginError(403, "", errcode=Codes.FORBIDDEN)
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defer.returnValue(user_id)
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@defer.inlineCallbacks
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def _check_ldap_password(self, user_id, password):
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@ -570,7 +582,7 @@ class AuthHandler(BaseHandler):
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)
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# check for existing account, if none exists, create one
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if not (yield self.does_user_exist(user_id)):
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if not (yield self.check_user_exists(user_id)):
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# query user metadata for account creation
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query = "({prop}={value})".format(
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prop=self.ldap_attributes['uid'],
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@ -145,10 +145,13 @@ class LoginRestServlet(ClientV1RestServlet):
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).to_string()
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auth_handler = self.auth_handler
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user_id, access_token, refresh_token = yield auth_handler.login_with_password(
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user_id = yield auth_handler.validate_password_login(
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user_id=user_id,
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password=login_submission["password"])
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password=login_submission["password"],
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)
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access_token, refresh_token = (
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yield auth_handler.get_login_tuple_for_user_id(user_id)
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)
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result = {
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"user_id": user_id, # may have changed
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"access_token": access_token,
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@ -165,7 +168,7 @@ class LoginRestServlet(ClientV1RestServlet):
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user_id = (
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yield auth_handler.validate_short_term_login_token_and_get_user_id(token)
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)
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user_id, access_token, refresh_token = (
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access_token, refresh_token = (
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yield auth_handler.get_login_tuple_for_user_id(user_id)
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)
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result = {
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@ -196,13 +199,15 @@ class LoginRestServlet(ClientV1RestServlet):
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user_id = UserID.create(user, self.hs.hostname).to_string()
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auth_handler = self.auth_handler
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user_exists = yield auth_handler.does_user_exist(user_id)
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if user_exists:
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user_id, access_token, refresh_token = (
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yield auth_handler.get_login_tuple_for_user_id(user_id)
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registered_user_id = yield auth_handler.check_user_exists(user_id)
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if registered_user_id:
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access_token, refresh_token = (
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yield auth_handler.get_login_tuple_for_user_id(
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registered_user_id
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)
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)
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result = {
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"user_id": user_id, # may have changed
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"user_id": registered_user_id, # may have changed
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"access_token": access_token,
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"refresh_token": refresh_token,
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"home_server": self.hs.hostname,
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@ -245,13 +250,13 @@ class LoginRestServlet(ClientV1RestServlet):
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user_id = UserID.create(user, self.hs.hostname).to_string()
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auth_handler = self.auth_handler
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user_exists = yield auth_handler.does_user_exist(user_id)
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if user_exists:
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user_id, access_token, refresh_token = (
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yield auth_handler.get_login_tuple_for_user_id(user_id)
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registered_user_id = yield auth_handler.check_user_exists(user_id)
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if registered_user_id:
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access_token, refresh_token = (
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yield auth_handler.get_login_tuple_for_user_id(registered_user_id)
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)
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result = {
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"user_id": user_id, # may have changed
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"user_id": registered_user_id,
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"access_token": access_token,
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"refresh_token": refresh_token,
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"home_server": self.hs.hostname,
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@ -414,13 +419,13 @@ class CasTicketServlet(ClientV1RestServlet):
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user_id = UserID.create(user, self.hs.hostname).to_string()
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auth_handler = self.auth_handler
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user_exists = yield auth_handler.does_user_exist(user_id)
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if not user_exists:
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user_id, _ = (
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registered_user_id = yield auth_handler.check_user_exists(user_id)
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if not registered_user_id:
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registered_user_id, _ = (
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yield self.handlers.registration_handler.register(localpart=user)
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)
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login_token = auth_handler.generate_short_term_login_token(user_id)
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login_token = auth_handler.generate_short_term_login_token(registered_user_id)
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redirect_url = self.add_login_token_to_redirect_url(client_redirect_url,
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login_token)
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request.redirect(redirect_url)
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