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Do not check if a username is exclusive if the request is for an appservice in /register (#1652)

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* Do not check if a username is exclusive if the request is for an appservice in /register

* remove useless comment

* Move statements

* fix broken test

* Also fix the senderLocalpart problem

* Check domain name is ours

* Handle accessTokenErr

* Return unauthorised instead of forbidden

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
This commit is contained in:
Will Hunt 2020-12-18 14:36:59 +00:00 committed by GitHub
parent 4fe4c180e6
commit e4d1f0958f
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 50 additions and 36 deletions
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86
clientapi/routing/register.go
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@ -328,7 +328,22 @@ func UserIDIsWithinApplicationServiceNamespace(
userID string,
appservice *config.ApplicationService,
) bool {
var local, domain, err = gomatrixserverlib.SplitID('@', userID)
if err != nil {
// Not a valid userID
return false
}
if domain != cfg.Matrix.ServerName {
return false
}
if appservice != nil {
if appservice.SenderLocalpart == local {
return true
}
// Loop through given application service's namespaces and see if any match
for _, namespace := range appservice.NamespaceMap["users"] {
// AS namespaces are checked for validity in config
@ -341,6 +356,9 @@ func UserIDIsWithinApplicationServiceNamespace(
// Loop through all known application service's namespaces and see if any match
for _, knownAppService := range cfg.Derived.ApplicationServices {
if knownAppService.SenderLocalpart == local {
return true
}
for _, namespace := range knownAppService.NamespaceMap["users"] {
// AS namespaces are checked for validity in config
if namespace.RegexpObject.MatchString(userID) {
@ -488,17 +506,6 @@ func Register(
return *resErr
}
// Make sure normal user isn't registering under an exclusive application
// service namespace. Skip this check if no app services are registered.
if r.Auth.Type != authtypes.LoginTypeApplicationService &&
len(cfg.Derived.ApplicationServices) != 0 &&
UsernameMatchesExclusiveNamespaces(cfg, r.Username) {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.ASExclusive("This username is reserved by an application service."),
}
}
logger := util.GetLogger(req.Context())
logger.WithFields(log.Fields{
"username": r.Username,
@ -581,11 +588,39 @@ func handleRegistrationFlow(
// TODO: Handle mapping registrationRequest parameters into session parameters
// TODO: email / msisdn auth types.
accessToken, accessTokenErr := auth.ExtractAccessToken(req)
if accessTokenErr != nil {
return util.JSONResponse{
Code: http.StatusUnauthorized,
JSON: jsonerror.MissingToken(accessTokenErr.Error()),
}
}
// Appservices are special and are not affected by disabled
// registration or user exclusivity.
if r.Auth.Type == authtypes.LoginTypeApplicationService ||
(r.Auth.Type == "" && accessTokenErr == nil) {
return handleApplicationServiceRegistration(
accessToken, accessTokenErr, req, r, cfg, userAPI,
)
}
if cfg.RegistrationDisabled && r.Auth.Type != authtypes.LoginTypeSharedSecret {
return util.MessageResponse(http.StatusForbidden, "Registration has been disabled")
}
// Make sure normal user isn't registering under an exclusive application
// service namespace. Skip this check if no app services are registered.
// If an access token is provided, ignore this check this is an appservice
// request and we will validate in validateApplicationService
if len(cfg.Derived.ApplicationServices) != 0 &&
UsernameMatchesExclusiveNamespaces(cfg, r.Username) {
return util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.ASExclusive("This username is reserved by an application service."),
}
}
switch r.Auth.Type {
case authtypes.LoginTypeRecaptcha:
// Check given captcha response
@ -611,36 +646,15 @@ func handleRegistrationFlow(
// Add SharedSecret to the list of completed registration stages
AddCompletedSessionStage(sessionID, authtypes.LoginTypeSharedSecret)
case "":
// Extract the access token from the request, if there's one to extract
// (which we can know by checking whether the error is nil or not).
accessToken, err := auth.ExtractAccessToken(req)
// A missing auth type can mean either the registration is performed by
// an AS or the request is made as the first step of a registration
// using the User-Interactive Authentication API. This can be determined
// by whether the request contains an access token.
if err == nil {
return handleApplicationServiceRegistration(
accessToken, err, req, r, cfg, userAPI,
)
}
case authtypes.LoginTypeApplicationService:
// Extract the access token from the request.
accessToken, err := auth.ExtractAccessToken(req)
// Let the AS registration handler handle the process from here. We
// don't need a condition on that call since the registration is clearly
// stated as being AS-related.
return handleApplicationServiceRegistration(
accessToken, err, req, r, cfg, userAPI,
)
case authtypes.LoginTypeDummy:
// there is nothing to do
// Add Dummy to the list of completed registration stages
AddCompletedSessionStage(sessionID, authtypes.LoginTypeDummy)
case "":
// An empty auth type means that we want to fetch the available
// flows. It can also mean that we want to register as an appservice
// but that is handed above.
default:
return util.JSONResponse{
Code: http.StatusNotImplemented,