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key backup: add disable button,and enabling add dehydrated device option

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This commit is contained in:
Bruno Windels 2021-10-29 15:48:28 +02:00
parent 3b3751c827
commit 44a26fd340
11 changed files with 201 additions and 67 deletions
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5
src/domain/AccountSetupViewModel.js
View file

@ -15,6 +15,7 @@ limitations under the License.
*/
import {ViewModel} from "./ViewModel.js";
import {KeyType} from "../matrix/ssss/index.js";
export class AccountSetupViewModel extends ViewModel {
constructor(accountSetup) {
@ -35,10 +36,10 @@ export class AccountSetupViewModel extends ViewModel {
return this._accountSetup.encryptedDehydratedDevice.deviceId;
}
tryDecryptDehydratedDevice(password) {
async tryDecryptDehydratedDevice(password) {
const {encryptedDehydratedDevice} = this._accountSetup;
if (encryptedDehydratedDevice) {
this._dehydratedDevice = encryptedDehydratedDevice.decrypt(password);
this._dehydratedDevice = await encryptedDehydratedDevice.decrypt(KeyType.RecoveryKey, password);
this.emitChange("deviceDecrypted");
}
}

109
src/domain/session/settings/SessionBackupViewModel.js
View file

@ -15,18 +15,56 @@ limitations under the License.
*/
import {ViewModel} from "../../ViewModel.js";
import {KeyType} from "../../../matrix/ssss/index.js";
import {createEnum} from "../../../utils/enum.js";
const Status = createEnum("Enabled", "SetupKey", "SetupPhrase", "Pending");
export class SessionBackupViewModel extends ViewModel {
constructor(options) {
super(options);
this._session = options.session;
this._showKeySetup = true;
this._error = null;
this._isBusy = false;
this._dehydratedDeviceId = undefined;
this._status = undefined;
this._reevaluateStatus();
this.track(this._session.hasSecretStorageKey.subscribe(() => {
this.emitChange("status");
if (this._reevaluateStatus()) {
this.emitChange("status");
}
}));
}
_reevaluateStatus() {
if (this._isBusy) {
return false;
}
let status;
const hasSecretStorageKey = this._session.hasSecretStorageKey.get();
if (hasSecretStorageKey === true) {
status = this._session.sessionBackup ? Status.Enabled : Status.SetupKey;
} else if (hasSecretStorageKey === false) {
status = Status.SetupKey;
} else {
status = Status.Pending;
}
const changed = status !== this._status;
this._status = status;
return changed;
}
get decryptAction() {
return this.i18n`Set up`;
}
offerDehydratedDeviceSetup() {
return true;
}
get dehydratedDeviceId() {
return this._dehydratedDeviceId;
}
get isBusy() {
return this._isBusy;
@ -37,15 +75,7 @@ export class SessionBackupViewModel extends ViewModel {
}
get status() {
if (this._session.sessionBackup) {
return "enabled";
} else {
if (this._session.hasSecretStorageKey.get() === false) {
return this._showKeySetup ? "setupKey" : "setupPhrase";
} else {
return "pending";
}
}
return this._status;
}
get error() {
@ -53,46 +83,61 @@ export class SessionBackupViewModel extends ViewModel {
}
showPhraseSetup() {
this._showKeySetup = false;
this.emitChange("status");
if (this._status === Status.SetupKey) {
this._status = Status.SetupPhrase;
this.emitChange("status");
}
}
showKeySetup() {
this._showKeySetup = true;
this.emitChange("status");
if (this._status === Status.SetupPhrase) {
this._status = Status.SetupKey;
this.emitChange("status");
}
}
async enterSecurityPhrase(passphrase) {
if (passphrase) {
async _enterCredentials(keyType, credential, setupDehydratedDevice) {
if (credential) {
try {
this._isBusy = true;
this.emitChange("isBusy");
await this._session.enableSecretStorage("phrase", passphrase);
const key = await this._session.enableSecretStorage(keyType, credential);
if (setupDehydratedDevice) {
this._dehydratedDeviceId = await this._session.setupDehydratedDevice(key);
}
} catch (err) {
console.error(err);
this._error = err;
this.emitChange("error");
} finally {
this._isBusy = false;
this._reevaluateStatus();
this.emitChange("");
}
}
}
async enterSecurityKey(securityKey) {
if (securityKey) {
try {
this._isBusy = true;
this.emitChange("isBusy");
await this._session.enableSecretStorage("key", securityKey);
} catch (err) {
console.error(err);
this._error = err;
this.emitChange("error");
} finally {
this._isBusy = false;
this.emitChange("");
}
enterSecurityPhrase(passphrase, setupDehydratedDevice) {
this._enterCredentials(KeyType.Passphrase, passphrase, setupDehydratedDevice);
}
enterSecurityKey(securityKey, setupDehydratedDevice) {
this._enterCredentials(KeyType.RecoveryKey, securityKey, setupDehydratedDevice);
}
async disable() {
try {
this._isBusy = true;
this.emitChange("isBusy");
await this._session.disableSecretStorage();
} catch (err) {
console.error(err);
this._error = err;
this.emitChange("error");
} finally {
this._isBusy = false;
this._reevaluateStatus();
this.emitChange("");
}
}
}

26
src/matrix/Session.js
View file

@ -40,6 +40,7 @@ import {
keyFromCredential as ssssKeyFromCredential,
readKey as ssssReadKey,
writeKey as ssssWriteKey,
removeKey as ssssRemoveKey
} from "./ssss/index.js";
import {SecretStorage} from "./ssss/SecretStorage.js";
import {ObservableValue, RetainedObservableValue} from "../observable/ObservableValue";
@ -217,6 +218,30 @@ export class Session {
}
await writeTxn.complete();
this._hasSecretStorageKey.set(true);
return key;
}
async disableSecretStorage() {
const writeTxn = await this._storage.readWriteTxn([
this._storage.storeNames.session,
]);
try {
ssssRemoveKey(writeTxn);
} catch (err) {
writeTxn.abort();
throw err;
}
await writeTxn.complete();
if (this._sessionBackup) {
for (const room of this._rooms.values()) {
if (room.isEncrypted) {
room.enableSessionBackup(undefined);
}
}
this._sessionBackup?.dispose();
this._sessionBackup = undefined;
}
this._hasSecretStorageKey.set(false);
}
async _createSessionBackup(ssssKey, txn) {
@ -311,6 +336,7 @@ export class Session {
try {
const deviceId = await uploadAccountAsDehydratedDevice(
dehydrationAccount, this._hsApi, key, "Dehydrated device", log);
log.set("deviceId", deviceId);
return deviceId;
} finally {
dehydrationAccount.dispose();

2
src/matrix/SessionContainer.js
View file

@ -321,7 +321,7 @@ export class SessionContainer {
request: this._platform.request,
});
const olm = await this._olmPromise;
const encryptedDehydratedDevice = await getDehydratedDevice(hsApi, olm, log);
const encryptedDehydratedDevice = await getDehydratedDevice(hsApi, olm, this._platform, log);
if (encryptedDehydratedDevice) {
let resolveStageFinish;
const promiseStageFinish = new Promise(r => resolveStageFinish = r);

33
src/matrix/e2ee/Dehydration.js
View file

@ -15,12 +15,14 @@ limitations under the License.
*/
const DEHYDRATION_LIBOLM_PICKLE_ALGORITHM = "org.matrix.msc2697.v1.olm.libolm_pickle";
import {KeyDescription} from "../ssss/common.js";
import {keyFromCredentialAndDescription} from "../ssss/index.js";
export async function getDehydratedDevice(hsApi, olm, log) {
export async function getDehydratedDevice(hsApi, olm, platform, log) {
try {
const response = await hsApi.getDehydratedDevice({log}).response();
if (response.device_data.algorithm === DEHYDRATION_LIBOLM_PICKLE_ALGORITHM) {
return new EncryptedDehydratedDevice(response, olm);
return new EncryptedDehydratedDevice(response, olm, platform);
}
} catch (err) {
if (err.name !== "HomeServerError") {
@ -34,8 +36,8 @@ export async function uploadAccountAsDehydratedDevice(account, hsApi, key, devic
const response = await hsApi.createDehydratedDevice({
device_data: {
algorithm: DEHYDRATION_LIBOLM_PICKLE_ALGORITHM,
account: account.pickleWithKey(new Uint8Array(key)),
passphrase: {}
account: account.pickleWithKey(key.binaryKey),
passphrase: key.description?.passphraseParams || {},
},
initial_device_display_name: deviceDisplayName
}).response();
@ -46,17 +48,20 @@ export async function uploadAccountAsDehydratedDevice(account, hsApi, key, devic
}
class EncryptedDehydratedDevice {
constructor(dehydratedDevice, olm) {
constructor(dehydratedDevice, olm, platform) {
this._dehydratedDevice = dehydratedDevice;
this._olm = olm;
this._platform = platform;
}
decrypt(key) {
async decrypt(keyType, credential) {
const keyDescription = new KeyDescription("dehydrated_device", this._dehydratedDevice.device_data.passphrase);
const key = await keyFromCredentialAndDescription(keyType, credential, keyDescription, this._platform, this._olm);
const account = new this._olm.Account();
try {
const pickledAccount = this._dehydratedDevice.device_data.account;
account.unpickle(new Uint8Array(key), pickledAccount);
return new DehydratedDevice(this._dehydratedDevice, account);
account.unpickle(key.binaryKey, pickledAccount);
return new DehydratedDevice(this._dehydratedDevice, account, keyType, key);
} catch (err) {
account.free();
if (err.message === "OLM.BAD_ACCOUNT_KEY") {
@ -73,9 +78,11 @@ class EncryptedDehydratedDevice {
}
class DehydratedDevice {
constructor(dehydratedDevice, account) {
constructor(dehydratedDevice, account, keyType, key) {
this._dehydratedDevice = dehydratedDevice;
this._account = account;
this._keyType = keyType;
this._key = key;
}
async claim(hsApi, log) {
@ -98,6 +105,14 @@ class DehydratedDevice {
return this._dehydratedDevice.device_id;
}
get key() {
return this._key;
}
get keyType() {
return this._keyType;
}
dispose() {
this._account?.free();
this._account = undefined;

2
src/matrix/e2ee/RoomEncryption.js
View file

@ -49,7 +49,7 @@ export class RoomEncryption {
}
enableSessionBackup(sessionBackup) {
if (this._sessionBackup) {
if (this._sessionBackup && !!sessionBackup) {
return;
}
this._sessionBackup = sessionBackup;

2
src/matrix/room/BaseRoom.js
View file

@ -463,7 +463,7 @@ export class BaseRoom extends EventEmitter {
enableSessionBackup(sessionBackup) {
this._roomEncryption?.enableSessionBackup(sessionBackup);
// TODO: do we really want to do this every time you open the app?
if (this._timeline) {
if (this._timeline && sessionBackup) {
this._platform.logger.run("enableSessionBackup", log => {
return this._roomEncryption.restoreMissingSessionsFromBackup(this._timeline.remoteEntries, log);
});

12
src/matrix/ssss/common.js
View file

@ -15,9 +15,9 @@ limitations under the License.
*/
export class KeyDescription {
constructor(id, keyAccountData) {
constructor(id, keyDescription) {
this._id = id;
this._keyAccountData = keyAccountData;
this._keyDescription = keyDescription;
}
get id() {
@ -25,11 +25,11 @@ export class KeyDescription {
}
get passphraseParams() {
return this._keyAccountData?.content?.passphrase;
return this._keyDescription?.passphrase;
}
get algorithm() {
return this._keyAccountData?.content?.algorithm;
return this._keyDescription?.algorithm;
}
}
@ -39,6 +39,10 @@ export class Key {
this._binaryKey = binaryKey;
}
get description() {
return this._keyDescription;
}
get id() {
return this._keyDescription.id;
}

20
src/matrix/ssss/index.js
View file

@ -18,9 +18,12 @@ import {KeyDescription, Key} from "./common.js";
import {keyFromPassphrase} from "./passphrase.js";
import {keyFromRecoveryKey} from "./recoveryKey.js";
import {SESSION_E2EE_KEY_PREFIX} from "../e2ee/common.js";
import {createEnum} from "../../utils/enum.js";
const SSSS_KEY = `${SESSION_E2EE_KEY_PREFIX}ssssKey`;
export const KeyType = createEnum("RecoveryKey", "Passphrase");
async function readDefaultKeyDescription(storage) {
const txn = await storage.readTxn([
storage.storeNames.accountData
@ -34,7 +37,7 @@ async function readDefaultKeyDescription(storage) {
if (!keyAccountData) {
return;
}
return new KeyDescription(id, keyAccountData);
return new KeyDescription(id, keyAccountData.content);
}
export async function writeKey(key, txn) {
@ -47,7 +50,12 @@ export async function readKey(txn) {
return;
}
const keyAccountData = await txn.accountData.get(`m.secret_storage.key.${keyData.id}`);
return new Key(new KeyDescription(keyData.id, keyAccountData), keyData.binaryKey);
return new Key(new KeyDescription(keyData.id, keyAccountData.content), keyData.binaryKey);
}
export async function removeKey(txn) {
await txn.session.remove(SSSS_KEY);
}
export async function keyFromCredential(type, credential, storage, platform, olm) {
@ -55,10 +63,14 @@ export async function keyFromCredential(type, credential, storage, platform, olm
if (!keyDescription) {
throw new Error("Could not find a default secret storage key in account data");
}
return await keyFromCredentialAndDescription(type, credential, keyDescription, platform, olm);
}
export async function keyFromCredentialAndDescription(type, credential, keyDescription, platform, olm) {
let key;
if (type === "phrase") {
if (type === KeyType.Passphrase) {
key = await keyFromPassphrase(keyDescription, credential, platform);
} else if (type === "key") {
} else if (type === KeyType.RecoveryKey) {
key = keyFromRecoveryKey(keyDescription, credential, olm, platform);
} else {
throw new Error(`Invalid type: ${type}`);

13
src/platform/web/ui/css/themes/element/theme.css
View file

@ -629,6 +629,19 @@ a {
.Settings .row .label {
flex: 0 0 200px;
align-self: flex-start;
}
.Settings .row .content p {
margin: 8px 0;
}
.Settings .row .content p:first-child {
margin-top: 0;
}
.Settings .row .content p:last-child {
margin-bottom: 0;
}
.error {

44
src/platform/web/ui/session/settings/SessionBackupSettingsView.js
View file

@ -21,17 +21,23 @@ export class SessionBackupSettingsView extends TemplateView {
render(t, vm) {
return t.mapView(vm => vm.status, status => {
switch (status) {
case "enabled": return new TemplateView(vm, renderEnabled)
case "setupKey": return new TemplateView(vm, renderEnableFromKey)
case "setupPhrase": return new TemplateView(vm, renderEnableFromPhrase)
case "pending": return new StaticView(vm, t => t.p(vm.i18n`Waiting to go online…`))
case "Enabled": return new TemplateView(vm, renderEnabled)
case "SetupKey": return new TemplateView(vm, renderEnableFromKey)
case "SetupPhrase": return new TemplateView(vm, renderEnableFromPhrase)
case "Pending": return new StaticView(vm, t => t.p(vm.i18n`Waiting to go online…`))
}
});
}
}
function renderEnabled(t, vm) {
return t.p(vm.i18n`Session backup is enabled, using backup version ${vm.backupVersion}.`);
const items = [
t.p([vm.i18n`Session backup is enabled, using backup version ${vm.backupVersion}. `, t.button({onClick: () => vm.disable()}, vm.i18n`Disable`)])
];
if (vm.dehydratedDeviceId) {
items.push(t.p(vm.i18n`A dehydrated device id was set up with id ${vm.dehydratedDeviceId} which you can use during your next login with your secret storage key.`));
}
return t.div(items);
}
function renderEnableFromKey(t, vm) {
@ -39,7 +45,7 @@ function renderEnableFromKey(t, vm) {
return t.div([
t.p(vm.i18n`Enter your secret storage security key below to set up session backup, which will enable you to decrypt messages received before you logged into this session. The security key is a code of 12 groups of 4 characters separated by a space that Element created for you when setting up security.`),
renderError(t),
renderEnableFieldRow(t, vm, vm.i18n`Security key`, key => vm.enterSecurityKey(key)),
renderEnableFieldRow(t, vm, vm.i18n`Security key`, (key, setupDehydratedDevice) => vm.enterSecurityKey(key, setupDehydratedDevice)),
t.p([vm.i18n`Alternatively, you can `, useASecurityPhrase, vm.i18n` if you have one.`]),
]);
}
@ -49,20 +55,32 @@ function renderEnableFromPhrase(t, vm) {
return t.div([
t.p(vm.i18n`Enter your secret storage security phrase below to set up session backup, which will enable you to decrypt messages received before you logged into this session. The security phrase is a freeform secret phrase you optionally chose when setting up security in Element. It is different from your password to login, unless you chose to set them to the same value.`),
renderError(t),
renderEnableFieldRow(t, vm, vm.i18n`Security phrase`, phrase => vm.enterSecurityPhrase(phrase)),
renderEnableFieldRow(t, vm, vm.i18n`Security phrase`, (phrase, setupDehydratedDevice) => vm.enterSecurityPhrase(phrase, setupDehydratedDevice)),
t.p([vm.i18n`You can also `, useASecurityKey, vm.i18n`.`]),
]);
}
function renderEnableFieldRow(t, vm, label, callback) {
const eventHandler = () => callback(input.value);
const input = t.input({type: "password", disabled: vm => vm.isBusy, placeholder: label, onChange: eventHandler});
let setupDehydrationCheck;
const eventHandler = () => callback(input.value, setupDehydrationCheck?.checked || false);
const input = t.input({type: "password", disabled: vm => vm.isBusy, placeholder: label});
const children = [
t.p([
input,
t.button({disabled: vm => vm.isBusy, onClick: eventHandler}, vm.decryptAction),
]),
];
if (vm.offerDehydratedDeviceSetup) {
setupDehydrationCheck = t.input({type: "checkbox", id:"enable-dehydrated-device"});
const moreInfo = t.a({href: "https://github.com/uhoreg/matrix-doc/blob/dehydration/proposals/2697-device-dehydration.md", target: "_blank", rel: "noopener"}, "more info");
children.push(t.p([
setupDehydrationCheck,
t.label({for: setupDehydrationCheck.id}, [vm.i18n`Back up my device as well (`, moreInfo, ")"])
]));
}
return t.div({className: `row`}, [
t.div({className: "label"}, label),
t.div({className: "content"}, [
input,
t.button({disabled: vm => vm.isBusy, onClick: eventHandler}, vm.i18n`Set up`),
]),
t.div({className: "content"}, children),
]);
}