Add graph /me/changePassword endpoint

To allow users to change their own password when using the Graph LDAP backend.

Closes:	owncloud#3063

extensions/graph/Makefile

@@ -28,6 +28,7 @@ ci-go-generate: $(MOCKERY) # CI runs ci-node-generate automatically before this
 	$(MOCKERY) --dir pkg/service/v0 --case underscore --name GatewayClient
 	$(MOCKERY) --dir pkg/service/v0 --case underscore --name HTTPClient
 	$(MOCKERY) --dir pkg/service/v0 --case underscore --name Publisher
+	$(MOCKERY) --srcpkg github.com/go-ldap/ldap/v3 --case underscore --filename ldapclient.go --name Client
 
 
 .PHONY: ci-node-generate

extensions/graph/pkg/service/v0/graph.go

@@ -17,12 +17,14 @@ import (
 	"google.golang.org/grpc"
 )
 
-//go:generate make generate
+//go:generate make -C ../../.. generate
 
 // GatewayClient is the subset of the gateway.GatewayAPIClient that is being used to interact with the gateway
 type GatewayClient interface {
 	//gateway.GatewayAPIClient
 
+	// Authenticates a user.
+	Authenticate(ctx context.Context, in *gateway.AuthenticateRequest, opts ...grpc.CallOption) (*gateway.AuthenticateResponse, error)
 	// Returns the home path for the given authenticated user.
 	// When a user has access to multiple storage providers, one of them is the home.
 	GetHome(ctx context.Context, in *provider.GetHomeRequest, opts ...grpc.CallOption) (*provider.GetHomeResponse, error)

extensions/graph/pkg/service/v0/instrument.go

@@ -54,6 +54,11 @@ func (i instrument) PatchUser(w http.ResponseWriter, r *http.Request) {
 	i.next.PatchUser(w, r)
 }
 
+// ChangeOwnPassword implements the Service interface.
+func (i instrument) ChangeOwnPassword(w http.ResponseWriter, r *http.Request) {
+	i.next.ChangeOwnPassword(w, r)
+}
+
 // GetGroups implements the Service interface.
 func (i instrument) GetGroups(w http.ResponseWriter, r *http.Request) {
 	i.next.GetGroups(w, r)

extensions/graph/pkg/service/v0/logging.go

@@ -54,6 +54,11 @@ func (l logging) PatchUser(w http.ResponseWriter, r *http.Request) {
 	l.next.PatchUser(w, r)
 }
 
+// ChangeOwnPassword implements the Service interface.
+func (l logging) ChangeOwnPassword(w http.ResponseWriter, r *http.Request) {
+	l.next.ChangeOwnPassword(w, r)
+}
+
 // GetGroups implements the Service interface.
 func (l logging) GetGroups(w http.ResponseWriter, r *http.Request) {
 	l.next.GetGroups(w, r)