Trust on decrypt

Add support for trust-on-decrypt (API change, recognise flag on
isKeyBackupTrusted). Catch rejection on wrong passphrase / recovery
key. Fix remembering whether we are restoring with key or passphrase.

Requires https://github.com/matrix-org/matrix-js-sdk/pull/836

src/components/views/dialogs/keybackup/RestoreKeyBackupDialog.js

@@ -88,7 +88,7 @@ export default React.createClass({
         });
         try {
             const recoverInfo = await MatrixClientPeg.get().restoreKeyBackupWithPassword(
-                this.state.passPhrase, undefined, undefined, this.state.backupInfo.version,
+                this.state.passPhrase, undefined, undefined, this.state.backupInfo,
             );
             this.setState({
                 loading: false,
@@ -107,11 +107,11 @@ export default React.createClass({
         this.setState({
             loading: true,
             restoreError: null,
-            restoreType: RESTORE_TYPE_PASSPHRASE,
+            restoreType: RESTORE_TYPE_RECOVERYKEY,
         });
         try {
             const recoverInfo = await MatrixClientPeg.get().restoreKeyBackupWithRecoveryKey(
-                this.state.recoveryKey, undefined, undefined, this.state.backupInfo.version,
+                this.state.recoveryKey, undefined, undefined, this.state.backupInfo,
             );
             this.setState({
                 loading: false,
@@ -185,18 +185,9 @@ export default React.createClass({
             title = _t("Error");
             content = _t("Unable to load backup status");
         } else if (this.state.restoreError) {
-            title = _t("Error");
+            if (this.state.restoreError.errcode === MatrixClientPeg.get().RESTORE_BACKUP_ERROR_BAD_KEY) {
-            content = _t("Unable to restore backup");
-        } else if (this.state.backupInfo === null) {
-            title = _t("Error");
-            content = _t("No backup found!");
-        } else if (
-            this.state.recoverInfo &&
-            this.state.recoverInfo.imported === 0 &&
-            this.state.recoverInfo.total > 0
-        ) {
-            title = _t("Error Restoring Backup");
                 if (this.state.restoreType === RESTORE_TYPE_RECOVERYKEY) {
+                    title = _t("Recovery Key Mismatch");
                     content = <div>
                         <p>{_t(
                             "Backup could not be decrypted with this key: " +
@@ -204,6 +195,7 @@ export default React.createClass({
                         )}</p>
                     </div>;
                 } else {
+                    title = _t("Incorrect Recovery Passphrase");
                     content = <div>
                         <p>{_t(
                             "Backup could not be decrypted with this passphrase: " +
@@ -211,6 +203,13 @@ export default React.createClass({
                         )}</p>
                     </div>;
                 }
+            } else {
+                title = _t("Error");
+                content = _t("Unable to restore backup");
+            }
+        } else if (this.state.backupInfo === null) {
+            title = _t("Error");
+            content = _t("No backup found!");
         } else if (this.state.recoverInfo) {
             title = _t("Backup Restored");
             let failedToDecrypt;

src/components/views/settings/KeyBackupPanel.js

@@ -250,13 +250,19 @@ export default class KeyBackupPanel extends React.PureComponent {
                 backupSigStatuses = _t("Backup is not signed by any of your devices");
             }
 
+            let trustedLocally;
+            if (this.state.backupSigStatus.trusted_locally) {
+                trustedLocally = _t("This backup is trusted because it has been restored on this device");
+            }
+
             return <div>
                 {_t("Backup version: ")}{this.state.backupInfo.version}<br />
                 {_t("Algorithm: ")}{this.state.backupInfo.algorithm}<br />
                 {clientBackupStatus}<br />
                 {uploadStatus}
-                <div>{backupSigStatuses}</div><br />
+                <div>{backupSigStatuses}</div>
-                <br />
+                <div>{trustedLocally}</div>
+                <br /><br />
                 <AccessibleButton kind="primary" onClick={this._restoreBackup}>
                     { _t("Restore backup") }
                 </AccessibleButton>&nbsp;&nbsp;&nbsp;

src/i18n/strings/en_EN.json

@@ -385,6 +385,7 @@
     "Backup has an <validity>invalid</validity> signature from <verify>unverified</verify> device <device></device>": "Backup has an <validity>invalid</validity> signature from <verify>unverified</verify> device <device></device>",
     "Verify...": "Verify...",
     "Backup is not signed by any of your devices": "Backup is not signed by any of your devices",
+    "This backup is trusted because it has been restored on this device": "This backup is trusted because it has been restored on this device",
     "Backup version: ": "Backup version: ",
     "Algorithm: ": "Algorithm: ",
     "Restore backup": "Restore backup",
@@ -1095,11 +1096,12 @@
     "\"%(RoomName)s\" contains devices that you haven't seen before.": "\"%(RoomName)s\" contains devices that you haven't seen before.",
     "Unknown devices": "Unknown devices",
     "Unable to load backup status": "Unable to load backup status",
+    "Recovery Key Mismatch": "Recovery Key Mismatch",
+    "Backup could not be decrypted with this key: please verify that you entered the correct recovery key.": "Backup could not be decrypted with this key: please verify that you entered the correct recovery key.",
+    "Incorrect Recovery Passphrase": "Incorrect Recovery Passphrase",
+    "Backup could not be decrypted with this passphrase: please verify that you entered the correct recovery passphrase.": "Backup could not be decrypted with this passphrase: please verify that you entered the correct recovery passphrase.",
     "Unable to restore backup": "Unable to restore backup",
     "No backup found!": "No backup found!",
-    "Error Restoring Backup": "Error Restoring Backup",
-    "Backup could not be decrypted with this key: please verify that you entered the correct recovery key.": "Backup could not be decrypted with this key: please verify that you entered the correct recovery key.",
-    "Backup could not be decrypted with this passphrase: please verify that you entered the correct recovery passphrase.": "Backup could not be decrypted with this passphrase: please verify that you entered the correct recovery passphrase.",
     "Backup Restored": "Backup Restored",
     "Failed to decrypt %(failedCount)s sessions!": "Failed to decrypt %(failedCount)s sessions!",
     "Restored %(sessionCount)s session keys": "Restored %(sessionCount)s session keys",