Warn users of E2E key loss when changing/resetting passwords or logging out

src/component-index.js

@@ -79,8 +79,6 @@ import views$dialogs$ErrorDialog from './components/views/dialogs/ErrorDialog';
 views$dialogs$ErrorDialog && (module.exports.components['views.dialogs.ErrorDialog'] = views$dialogs$ErrorDialog);
 import views$dialogs$InteractiveAuthDialog from './components/views/dialogs/InteractiveAuthDialog';
 views$dialogs$InteractiveAuthDialog && (module.exports.components['views.dialogs.InteractiveAuthDialog'] = views$dialogs$InteractiveAuthDialog);
-import views$dialogs$LogoutPrompt from './components/views/dialogs/LogoutPrompt';
-views$dialogs$LogoutPrompt && (module.exports.components['views.dialogs.LogoutPrompt'] = views$dialogs$LogoutPrompt);
 import views$dialogs$NeedToRegisterDialog from './components/views/dialogs/NeedToRegisterDialog';
 views$dialogs$NeedToRegisterDialog && (module.exports.components['views.dialogs.NeedToRegisterDialog'] = views$dialogs$NeedToRegisterDialog);
 import views$dialogs$QuestionDialog from './components/views/dialogs/QuestionDialog';

src/components/structures/UserSettings.js

@@ -228,8 +228,26 @@ module.exports = React.createClass({
     },
 
     onLogoutClicked: function(ev) {
-        var LogoutPrompt = sdk.getComponent('dialogs.LogoutPrompt');
-        this.logoutModal = Modal.createDialog(LogoutPrompt);
+        var QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
+        Modal.createDialog(QuestionDialog, {
+            title: "Sign out?",
+            description:
+                <div>
+                    For security, logging out will delete any end-to-end encryption keys from this browser,
+                    making previous encrypted chat history unreadable if you log back in.
+                    In future this <a href="https://github.com/vector-im/riot-web/issues/2108">will be improved</a>,
+                    but for now be warned.
+                </div>,
+            button: "Sign out",
+            onFinished: (confirmed) => {
+                if (confirmed) {
+                    dis.dispatch({action: 'logout'});
+                    if (this.props.onFinished) {
+                        this.props.onFinished();
+                    }
+                }
+            },
+        });
     },
 
     onPasswordChangeError: function(err) {

src/components/structures/login/ForgotPassword.js

@@ -87,10 +87,26 @@ module.exports = React.createClass({
             this.showErrorDialog("New passwords must match each other.");
         }
         else {
-            this.submitPasswordReset(
-                this.state.enteredHomeserverUrl, this.state.enteredIdentityServerUrl,
-                this.state.email, this.state.password
-            );
+            var QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
+            Modal.createDialog(QuestionDialog, {
+                title: "Warning",
+                description:
+                    <div>
+                        Resetting password will currently reset any end-to-end encryption keys on all devices,
+                        making encrypted chat history unreadable.
+                        In future this <a href="https://github.com/vector-im/riot-web/issues/2671">may be improved</a>,
+                        but for now be warned.
+                    </div>,
+                button: "Continue",
+                onFinished: (confirmed) => {
+                    if (confirmed) {
+                        this.submitPasswordReset(
+                            this.state.enteredHomeserverUrl, this.state.enteredIdentityServerUrl,
+                            this.state.email, this.state.password
+                        );
+                    }
+                },
+            });
         }
     },
 

src/components/views/settings/ChangePassword.js

@@ -18,6 +18,7 @@ limitations under the License.
 
 var React = require('react');
 var MatrixClientPeg = require("../../../MatrixClientPeg");
+var Modal = require("../../../Modal");
 var sdk = require("../../../index");
 
 module.exports = React.createClass({
@@ -65,26 +66,42 @@ module.exports = React.createClass({
     changePassword: function(old_password, new_password) {
         var cli = MatrixClientPeg.get();
 
-        var authDict = {
-            type: 'm.login.password',
-            user: cli.credentials.userId,
-            password: old_password
-        };
+        var QuestionDialog = sdk.getComponent("dialogs.QuestionDialog");
+        Modal.createDialog(QuestionDialog, {
+            title: "Warning",
+            description:
+                <div>
+                    Changing password will currently reset any end-to-end encryption keys on all devices,
+                    making encrypted chat history unreadable.
+                    This will be <a href="https://github.com/vector-im/riot-web/issues/2671">improved shortly</a>,
+                    but for now be warned.
+                </div>,
+            button: "Continue",
+            onFinished: (confirmed) => {
+                if (confirmed) {
+                    var authDict = {
+                        type: 'm.login.password',
+                        user: cli.credentials.userId,
+                        password: old_password
+                    };
 
-        this.setState({
-            phase: this.Phases.Uploading
+                    this.setState({
+                        phase: this.Phases.Uploading
+                    });
+
+                    var self = this;
+                    cli.setPassword(authDict, new_password).then(function() {
+                        self.props.onFinished();
+                    }, function(err) {
+                        self.props.onError(err);
+                    }).finally(function() {
+                        self.setState({
+                            phase: self.Phases.Edit
+                        });
+                    }).done();
+                }
+            },
         });
-
-        var self = this;
-        cli.setPassword(authDict, new_password).then(function() {
-            self.props.onFinished();
-        }, function(err) {
-            self.props.onError(err);
-        }).finally(function() {
-            self.setState({
-                phase: self.Phases.Edit
-            });
-        }).done();
     },
 
     onClickChange: function() {