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Check userID instead of username from application services (#500)

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* Check UserID instead of username from AS's. Tests.

* add tests to validateApplicationService

* Use some literals, organize URLs & checks

* Fix error messages and incorrect test
This commit is contained in:
Andrew Morgan 2018-07-06 03:28:49 -07:00 committed by GitHub
parent 20af8a6786
commit ae19db60e3
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 101 additions and 13 deletions
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29
src/github.com/matrix-org/dendrite/clientapi/routing/register.go
View file

@ -39,6 +39,7 @@ import (
"github.com/matrix-org/dendrite/clientapi/auth/storage/devices"
"github.com/matrix-org/dendrite/clientapi/httputil"
"github.com/matrix-org/dendrite/clientapi/jsonerror"
"github.com/matrix-org/dendrite/clientapi/userutil"
"github.com/matrix-org/gomatrixserverlib"
"github.com/matrix-org/util"
"github.com/prometheus/client_golang/prometheus"
@ -186,12 +187,12 @@ func validateUsername(username string) *util.JSONResponse {
} else if !validUsernameRegex.MatchString(username) {
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidUsername("User ID can only contain characters a-z, 0-9, or '_-./'"),
JSON: jsonerror.InvalidUsername("Username can only contain characters a-z, 0-9, or '_-./'"),
}
} else if username[0] == '_' { // Regex checks its not a zero length string
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidUsername("User ID cannot start with a '_'"),
JSON: jsonerror.InvalidUsername("Username cannot start with a '_'"),
}
}
return nil
@ -207,7 +208,7 @@ func validateApplicationServiceUsername(username string) *util.JSONResponse {
} else if !validUsernameRegex.MatchString(username) {
return &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.InvalidUsername("User ID can only contain characters a-z, 0-9, or '_-./'"),
JSON: jsonerror.InvalidUsername("Username can only contain characters a-z, 0-9, or '_-./'"),
}
}
return nil
@ -296,20 +297,20 @@ func validateRecaptcha(
return nil
}
// UsernameIsWithinApplicationServiceNamespace checks to see if a username falls
// within any of the namespaces of a given application service. If no
// application service is given, it will check to see if it matches any
// application service's namespace.
func UsernameIsWithinApplicationServiceNamespace(
// UserIDIsWithinApplicationServiceNamespace checks to see if a given userID
// falls within any of the namespaces of a given Application Service. If no
// Application Service is given, it will check to see if it matches any
// Application Service's namespace.
func UserIDIsWithinApplicationServiceNamespace(
cfg *config.Dendrite,
username string,
userID string,
appservice *config.ApplicationService,
) bool {
if appservice != nil {
// 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
if namespace.RegexpObject.MatchString(username) {
if namespace.RegexpObject.MatchString(userID) {
return true
}
}
@ -320,7 +321,7 @@ func UsernameIsWithinApplicationServiceNamespace(
for _, knownAppservice := range cfg.Derived.ApplicationServices {
for _, namespace := range knownAppservice.NamespaceMap["users"] {
// AS namespaces are checked for validity in config
if namespace.RegexpObject.MatchString(username) {
if namespace.RegexpObject.MatchString(userID) {
return true
}
}
@ -375,8 +376,10 @@ func validateApplicationService(
}
}
userID := userutil.MakeUserID(username, cfg.Matrix.ServerName)
// Ensure the desired username is within at least one of the application service's namespaces.
if !UsernameIsWithinApplicationServiceNamespace(cfg, username, matchedApplicationService) {
if !UserIDIsWithinApplicationServiceNamespace(cfg, userID, matchedApplicationService) {
// If we didn't find any matches, return M_EXCLUSIVE
return "", &util.JSONResponse{
Code: http.StatusBadRequest,
@ -386,7 +389,7 @@ func validateApplicationService(
}
// Check this user does not fit multiple application service namespaces
if UsernameMatchesMultipleExclusiveNamespaces(cfg, username) {
if UsernameMatchesMultipleExclusiveNamespaces(cfg, userID) {
return "", &util.JSONResponse{
Code: http.StatusBadRequest,
JSON: jsonerror.ASExclusive(fmt.Sprintf(

85
src/github.com/matrix-org/dendrite/clientapi/routing/register_test.go
View file

@ -15,9 +15,13 @@
package routing
import (
"net/http"
"net/url"
"regexp"
"testing"
"github.com/matrix-org/dendrite/clientapi/auth/authtypes"
"github.com/matrix-org/dendrite/common/config"
)
var (
@ -145,3 +149,84 @@ func TestEmptyCompletedFlows(t *testing.T) {
t.Error("Empty Completed Flow Stages should be a empty slice: returned ", ret, ". Should be []")
}
}
// This method tests validation of the provided Application Service token and
// username that they're registering
func TestValidationOfApplicationServices(t *testing.T) {
// Set up application service namespaces
regex := "@_appservice_.*"
regexp, err := regexp.Compile(regex)
if err != nil {
t.Errorf("Error compiling regex: %s", regex)
}
fakeNamespace := config.ApplicationServiceNamespace{
Exclusive: true,
Regex: regex,
RegexpObject: regexp,
}
// Create a fake application service
fakeID := "FakeAS"
fakeSenderLocalpart := "_appservice_bot"
fakeApplicationService := config.ApplicationService{
ID: fakeID,
URL: "null",
ASToken: "1234",
HSToken: "4321",
SenderLocalpart: fakeSenderLocalpart,
NamespaceMap: map[string][]config.ApplicationServiceNamespace{
"users": {fakeNamespace},
},
}
// Set up a config
fakeConfig := config.Dendrite{}
fakeConfig.Matrix.ServerName = "localhost"
fakeConfig.Derived.ApplicationServices = []config.ApplicationService{fakeApplicationService}
// Access token is correct, user_id omitted so we are acting as SenderLocalpart
URL, _ := url.Parse("http://localhost/register?access_token=1234")
fakeHTTPRequest := http.Request{
Method: "POST",
URL: URL,
}
asID, resp := validateApplicationService(&fakeConfig, &fakeHTTPRequest, fakeSenderLocalpart)
if resp != nil || asID != fakeID {
t.Errorf("appservice should have validated and returned correct ID: %s", resp.JSON)
}
// Access token is incorrect, user_id omitted so we are acting as SenderLocalpart
URL, _ = url.Parse("http://localhost/register?access_token=xxxx")
fakeHTTPRequest = http.Request{
Method: "POST",
URL: URL,
}
asID, resp = validateApplicationService(&fakeConfig, &fakeHTTPRequest, fakeSenderLocalpart)
if resp == nil || asID == fakeID {
t.Errorf("access_token should have been marked as invalid")
}
// Access token is correct, acting as valid user_id
URL, _ = url.Parse("http://localhost/register?access_token=1234&user_id=@_appservice_bob:localhost")
fakeHTTPRequest = http.Request{
Method: "POST",
URL: URL,
}
asID, resp = validateApplicationService(&fakeConfig, &fakeHTTPRequest, "_appservice_bob")
if resp != nil || asID != fakeID {
t.Errorf("access_token and user_id should've been valid: %s", resp.JSON)
}
// Access token is correct, acting as invalid user_id
URL, _ = url.Parse("http://localhost/register?access_token=1234&user_id=@_something_else:localhost")
fakeHTTPRequest = http.Request{
Method: "POST",
URL: URL,
}
asID, resp = validateApplicationService(&fakeConfig, &fakeHTTPRequest, "_something_else")
if resp == nil || asID == fakeID {
t.Errorf("user_id should not have been valid: %s",
fakeHTTPRequest.URL.Query().Get("user_id"))
}
}