Implement account deactivation (#1455)

* Implement account deactivation

See #610
Signed-off-by: Loïck Bonniot <git@lesterpig.com>

* Rename 'is_active' to 'is_deactivated'

Signed-off-by: Loïck Bonniot <git@lesterpig.com>

Co-authored-by: Kegsay <kegan@matrix.org>

clientapi/routing/deactivate.go

@@ -0,0 +1,55 @@
+package routing
+
+import (
+	"io/ioutil"
+	"net/http"
+
+	"github.com/matrix-org/dendrite/clientapi/auth"
+	"github.com/matrix-org/dendrite/clientapi/jsonerror"
+	"github.com/matrix-org/dendrite/userapi/api"
+	"github.com/matrix-org/gomatrixserverlib"
+	"github.com/matrix-org/util"
+)
+
+// Deactivate handles POST requests to /account/deactivate
+func Deactivate(
+	req *http.Request,
+	userInteractiveAuth *auth.UserInteractive,
+	userAPI api.UserInternalAPI,
+	deviceAPI *api.Device,
+) util.JSONResponse {
+	ctx := req.Context()
+	defer req.Body.Close() // nolint:errcheck
+	bodyBytes, err := ioutil.ReadAll(req.Body)
+	if err != nil {
+		return util.JSONResponse{
+			Code: http.StatusBadRequest,
+			JSON: jsonerror.BadJSON("The request body could not be read: " + err.Error()),
+		}
+	}
+
+	login, errRes := userInteractiveAuth.Verify(ctx, bodyBytes, deviceAPI)
+	if errRes != nil {
+		return *errRes
+	}
+
+	localpart, _, err := gomatrixserverlib.SplitID('@', login.User)
+	if err != nil {
+		util.GetLogger(req.Context()).WithError(err).Error("gomatrixserverlib.SplitID failed")
+		return jsonerror.InternalServerError()
+	}
+
+	var res api.PerformAccountDeactivationResponse
+	err = userAPI.PerformAccountDeactivation(ctx, &api.PerformAccountDeactivationRequest{
+		Localpart: localpart,
+	}, &res)
+	if err != nil {
+		util.GetLogger(ctx).WithError(err).Error("userAPI.PerformAccountDeactivation failed")
+		return jsonerror.InternalServerError()
+	}
+
+	return util.JSONResponse{
+		Code: http.StatusOK,
+		JSON: struct{}{},
+	}
+}

clientapi/routing/routing.go

@@ -435,6 +435,15 @@ func Setup(
 		}),
 	).Methods(http.MethodPost, http.MethodOptions)
 
+	r0mux.Handle("/account/deactivate",
+		httputil.MakeAuthAPI("deactivate", userAPI, func(req *http.Request, device *userapi.Device) util.JSONResponse {
+			if r := rateLimits.rateLimit(req); r != nil {
+				return *r
+			}
+			return Deactivate(req, userInteractiveAuth, userAPI, device)
+		}),
+	).Methods(http.MethodPost, http.MethodOptions)
+
 	// Stub endpoints required by Riot
 
 	r0mux.Handle("/login",

sytest-whitelist

@@ -219,6 +219,9 @@ Regular users cannot create room aliases within the AS namespace
 Deleting a non-existent alias should return a 404
 Users can't delete other's aliases
 Outbound federation can query room alias directory
+Can deactivate account
+Can't deactivate account with wrong password
+After deactivating account, can't log in with password
 After deactivating account, can't log in with an email
 Remote room alias queries can handle Unicode
 Newly joined room is included in an incremental sync after invite

userapi/api/api.go

@@ -30,6 +30,7 @@ type UserInternalAPI interface {
 	PerformDeviceCreation(ctx context.Context, req *PerformDeviceCreationRequest, res *PerformDeviceCreationResponse) error
 	PerformDeviceDeletion(ctx context.Context, req *PerformDeviceDeletionRequest, res *PerformDeviceDeletionResponse) error
 	PerformDeviceUpdate(ctx context.Context, req *PerformDeviceUpdateRequest, res *PerformDeviceUpdateResponse) error
+	PerformAccountDeactivation(ctx context.Context, req *PerformAccountDeactivationRequest, res *PerformAccountDeactivationResponse) error
 	QueryProfile(ctx context.Context, req *QueryProfileRequest, res *QueryProfileResponse) error
 	QueryAccessToken(ctx context.Context, req *QueryAccessTokenRequest, res *QueryAccessTokenResponse) error
 	QueryDevices(ctx context.Context, req *QueryDevicesRequest, res *QueryDevicesResponse) error
@@ -199,6 +200,16 @@ type PerformDeviceCreationResponse struct {
 	Device        *Device
 }
 
+// PerformAccountDeactivationRequest is the request for PerformAccountDeactivation
+type PerformAccountDeactivationRequest struct {
+	Localpart string
+}
+
+// PerformAccountDeactivationResponse is the response for PerformAccountDeactivation
+type PerformAccountDeactivationResponse struct {
+	AccountDeactivated bool
+}
+
 // Device represents a client's device (mobile, web, etc)
 type Device struct {
 	ID     string

userapi/internal/api.go

@@ -388,3 +388,10 @@ func (a *UserInternalAPI) queryAppServiceToken(ctx context.Context, token, appSe
 	dev.UserID = appService.SenderLocalpart
 	return &dev, nil
 }
+
+// PerformAccountDeactivation deactivates the user's account, removing all ability for the user to login again.
+func (a *UserInternalAPI) PerformAccountDeactivation(ctx context.Context, req *api.PerformAccountDeactivationRequest, res *api.PerformAccountDeactivationResponse) error {
+	err := a.AccountDB.DeactivateAccount(ctx, req.Localpart)
+	res.AccountDeactivated = err == nil
+	return err
+}

userapi/inthttp/client.go

@@ -33,6 +33,7 @@ const (
 	PerformPasswordUpdatePath      = "/userapi/performPasswordUpdate"
 	PerformDeviceDeletionPath      = "/userapi/performDeviceDeletion"
 	PerformDeviceUpdatePath        = "/userapi/performDeviceUpdate"
+	PerformAccountDeactivationPath = "/userapi/performAccountDeactivation"
 
 	QueryProfilePath        = "/userapi/queryProfile"
 	QueryAccessTokenPath    = "/userapi/queryAccessToken"
@@ -126,6 +127,14 @@ func (h *httpUserInternalAPI) PerformDeviceUpdate(ctx context.Context, req *api.
 	return httputil.PostJSON(ctx, span, h.httpClient, apiURL, req, res)
 }
 
+func (h *httpUserInternalAPI) PerformAccountDeactivation(ctx context.Context, req *api.PerformAccountDeactivationRequest, res *api.PerformAccountDeactivationResponse) error {
+	span, ctx := opentracing.StartSpanFromContext(ctx, "PerformAccountDeactivation")
+	defer span.Finish()
+
+	apiURL := h.apiURL + PerformAccountDeactivationPath
+	return httputil.PostJSON(ctx, span, h.httpClient, apiURL, req, res)
+}
+
 func (h *httpUserInternalAPI) QueryProfile(
 	ctx context.Context,
 	request *api.QueryProfileRequest,

userapi/inthttp/server.go

@@ -91,6 +91,19 @@ func AddRoutes(internalAPIMux *mux.Router, s api.UserInternalAPI) {
 			return util.JSONResponse{Code: http.StatusOK, JSON: &response}
 		}),
 	)
+	internalAPIMux.Handle(PerformAccountDeactivationPath,
+		httputil.MakeInternalAPI("performAccountDeactivation", func(req *http.Request) util.JSONResponse {
+			request := api.PerformAccountDeactivationRequest{}
+			response := api.PerformAccountDeactivationResponse{}
+			if err := json.NewDecoder(req.Body).Decode(&request); err != nil {
+				return util.MessageResponse(http.StatusBadRequest, err.Error())
+			}
+			if err := s.PerformAccountDeactivation(req.Context(), &request, &response); err != nil {
+				return util.ErrorResponse(err)
+			}
+			return util.JSONResponse{Code: http.StatusOK, JSON: &response}
+		}),
+	)
 	internalAPIMux.Handle(QueryProfilePath,
 		httputil.MakeInternalAPI("queryProfile", func(req *http.Request) util.JSONResponse {
 			request := api.QueryProfileRequest{}

userapi/storage/accounts/interface.go

@@ -51,6 +51,7 @@ type Database interface {
 	CheckAccountAvailability(ctx context.Context, localpart string) (bool, error)
 	GetAccountByLocalpart(ctx context.Context, localpart string) (*api.Account, error)
 	SearchProfiles(ctx context.Context, searchString string, limit int) ([]authtypes.Profile, error)
+	DeactivateAccount(ctx context.Context, localpart string) (err error)
 }
 
 // Err3PIDInUse is the error returned when trying to save an association involving

userapi/storage/accounts/postgres/accounts_table.go

@@ -37,7 +37,9 @@ CREATE TABLE IF NOT EXISTS account_accounts (
     -- The password hash for this account. Can be NULL if this is a passwordless account.
     password_hash TEXT,
     -- Identifies which application service this account belongs to, if any.
-    appservice_id TEXT
+    appservice_id TEXT,
+    -- If the account is currently active
+    is_deactivated BOOLEAN DEFAULT FALSE
     -- TODO:
     -- is_guest, is_admin, upgraded_ts, devices, any email reset stuff?
 );
@@ -51,11 +53,14 @@ const insertAccountSQL = "" +
 const updatePasswordSQL = "" +
 	"UPDATE account_accounts SET password_hash = $1 WHERE localpart = $2"
 
+const deactivateAccountSQL = "" +
+	"UPDATE account_accounts SET is_deactivated = TRUE WHERE localpart = $1"
+
 const selectAccountByLocalpartSQL = "" +
 	"SELECT localpart, appservice_id FROM account_accounts WHERE localpart = $1"
 
 const selectPasswordHashSQL = "" +
-	"SELECT password_hash FROM account_accounts WHERE localpart = $1"
+	"SELECT password_hash FROM account_accounts WHERE localpart = $1 AND is_deactivated = FALSE"
 
 const selectNewNumericLocalpartSQL = "" +
 	"SELECT nextval('numeric_username_seq')"
@@ -63,6 +68,7 @@ const selectNewNumericLocalpartSQL = "" +
 type accountsStatements struct {
 	insertAccountStmt             *sql.Stmt
 	updatePasswordStmt            *sql.Stmt
+	deactivateAccountStmt         *sql.Stmt
 	selectAccountByLocalpartStmt  *sql.Stmt
 	selectPasswordHashStmt        *sql.Stmt
 	selectNewNumericLocalpartStmt *sql.Stmt
@@ -80,6 +86,9 @@ func (s *accountsStatements) prepare(db *sql.DB, server gomatrixserverlib.Server
 	if s.updatePasswordStmt, err = db.Prepare(updatePasswordSQL); err != nil {
 		return
 	}
+	if s.deactivateAccountStmt, err = db.Prepare(deactivateAccountSQL); err != nil {
+		return
+	}
 	if s.selectAccountByLocalpartStmt, err = db.Prepare(selectAccountByLocalpartSQL); err != nil {
 		return
 	}
@@ -127,6 +136,13 @@ func (s *accountsStatements) updatePassword(
 	return
 }
 
+func (s *accountsStatements) deactivateAccount(
+	ctx context.Context, localpart string,
+) (err error) {
+	_, err = s.deactivateAccountStmt.ExecContext(ctx, localpart)
+	return
+}
+
 func (s *accountsStatements) selectPasswordHash(
 	ctx context.Context, localpart string,
 ) (hash string, err error) {

userapi/storage/accounts/postgres/deltas/20200929203058_is_active.sql

@@ -0,0 +1,9 @@
+-- +goose Up
+-- +goose StatementBegin
+ALTER TABLE account_accounts ADD COLUMN IF NOT EXISTS is_deactivated BOOLEAN DEFAULT FALSE;
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+ALTER TABLE account_accounts DROP COLUMN is_deactivated;
+-- +goose StatementEnd

userapi/storage/accounts/postgres/storage.go

@@ -317,3 +317,8 @@ func (d *Database) SearchProfiles(ctx context.Context, searchString string, limi
 ) ([]authtypes.Profile, error) {
 	return d.profiles.selectProfilesBySearch(ctx, searchString, limit)
 }
+
+// DeactivateAccount deactivates the user's account, removing all ability for the user to login again.
+func (d *Database) DeactivateAccount(ctx context.Context, localpart string) (err error) {
+	return d.accounts.deactivateAccount(ctx, localpart)
+}

userapi/storage/accounts/sqlite3/accounts_table.go

@@ -37,7 +37,9 @@ CREATE TABLE IF NOT EXISTS account_accounts (
     -- The password hash for this account. Can be NULL if this is a passwordless account.
     password_hash TEXT,
     -- Identifies which application service this account belongs to, if any.
-    appservice_id TEXT
+    appservice_id TEXT,
+    -- If the account is currently active
+    is_deactivated BOOLEAN DEFAULT 0
     -- TODO:
     -- is_guest, is_admin, upgraded_ts, devices, any email reset stuff?
 );
@@ -49,11 +51,14 @@ const insertAccountSQL = "" +
 const updatePasswordSQL = "" +
 	"UPDATE account_accounts SET password_hash = $1 WHERE localpart = $2"
 
+const deactivateAccountSQL = "" +
+	"UPDATE account_accounts SET is_deactivated = 1 WHERE localpart = $1"
+
 const selectAccountByLocalpartSQL = "" +
 	"SELECT localpart, appservice_id FROM account_accounts WHERE localpart = $1"
 
 const selectPasswordHashSQL = "" +
-	"SELECT password_hash FROM account_accounts WHERE localpart = $1"
+	"SELECT password_hash FROM account_accounts WHERE localpart = $1 AND is_deactivated = 0"
 
 const selectNewNumericLocalpartSQL = "" +
 	"SELECT COUNT(localpart) FROM account_accounts"
@@ -62,6 +67,7 @@ type accountsStatements struct {
 	db                            *sql.DB
 	insertAccountStmt             *sql.Stmt
 	updatePasswordStmt            *sql.Stmt
+	deactivateAccountStmt         *sql.Stmt
 	selectAccountByLocalpartStmt  *sql.Stmt
 	selectPasswordHashStmt        *sql.Stmt
 	selectNewNumericLocalpartStmt *sql.Stmt
@@ -81,6 +87,9 @@ func (s *accountsStatements) prepare(db *sql.DB, server gomatrixserverlib.Server
 	if s.updatePasswordStmt, err = db.Prepare(updatePasswordSQL); err != nil {
 		return
 	}
+	if s.deactivateAccountStmt, err = db.Prepare(deactivateAccountSQL); err != nil {
+		return
+	}
 	if s.selectAccountByLocalpartStmt, err = db.Prepare(selectAccountByLocalpartSQL); err != nil {
 		return
 	}
@@ -128,6 +137,13 @@ func (s *accountsStatements) updatePassword(
 	return
 }
 
+func (s *accountsStatements) deactivateAccount(
+	ctx context.Context, localpart string,
+) (err error) {
+	_, err = s.deactivateAccountStmt.ExecContext(ctx, localpart)
+	return
+}
+
 func (s *accountsStatements) selectPasswordHash(
 	ctx context.Context, localpart string,
 ) (hash string, err error) {

userapi/storage/accounts/sqlite3/deltas/20200929203058_is_active.sql

@@ -0,0 +1,38 @@
+-- +goose Up
+-- +goose StatementBegin
+ALTER TABLE account_accounts RENAME TO account_accounts_tmp;
+CREATE TABLE account_accounts (
+    localpart TEXT NOT NULL PRIMARY KEY,
+    created_ts BIGINT NOT NULL,
+    password_hash TEXT,
+    appservice_id TEXT,
+    is_deactivated BOOLEAN DEFAULT 0
+);
+INSERT
+    INTO account_accounts (
+      localpart, created_ts, password_hash, appservice_id
+    ) SELECT
+        localpart, created_ts, password_hash, appservice_id
+    FROM account_accounts_tmp
+;
+DROP TABLE account_accounts_tmp;
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+ALTER TABLE account_accounts RENAME TO account_accounts_tmp;
+CREATE TABLE account_accounts (
+    localpart TEXT NOT NULL PRIMARY KEY,
+    created_ts BIGINT NOT NULL,
+    password_hash TEXT,
+    appservice_id TEXT
+);
+INSERT
+    INTO account_accounts (
+      localpart, created_ts, password_hash, appservice_id
+    ) SELECT
+        localpart, created_ts, password_hash, appservice_id
+    FROM account_accounts_tmp
+;
+DROP TABLE account_accounts_tmp;
+-- +goose StatementEnd

userapi/storage/accounts/sqlite3/storage.go

@@ -359,3 +359,8 @@ func (d *Database) SearchProfiles(ctx context.Context, searchString string, limi
 ) ([]authtypes.Profile, error) {
 	return d.profiles.selectProfilesBySearch(ctx, searchString, limit)
 }
+
+// DeactivateAccount deactivates the user's account, removing all ability for the user to login again.
+func (d *Database) DeactivateAccount(ctx context.Context, localpart string) (err error) {
+	return d.accounts.deactivateAccount(ctx, localpart)
+}