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D8999.1767147333.diff
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diff --git a/native/backup/conversion-utils.js b/native/backup/conversion-utils.js
--- a/native/backup/conversion-utils.js
+++ b/native/backup/conversion-utils.js
@@ -10,4 +10,10 @@
return new Uint8Array(decodedBuffer);
}
-export { getBackupBytesFromBlob };
+function convertObjToBytes<T>(obj: T): Uint8Array {
+ const objStr = JSON.stringify(obj);
+ const objBuffer = commUtilsModule.encodeStringToUTF8ArrayBuffer(objStr ?? '');
+ return new Uint8Array(objBuffer);
+}
+
+export { getBackupBytesFromBlob, convertObjToBytes };
diff --git a/native/backup/encryption.js b/native/backup/encryption.js
--- a/native/backup/encryption.js
+++ b/native/backup/encryption.js
@@ -1,7 +1,12 @@
// @flow
+import { hexToUintArray } from 'lib/media/data-utils.js';
+import type { Backup, BackupEncrypted } from 'lib/types/backup-types.js';
+
+import { convertObjToBytes } from './conversion-utils.js';
import { fetchNativeKeychainCredentials } from '../account/native-credentials.js';
import { commCoreModule } from '../native-modules.js';
+import * as AES from '../utils/aes-crypto-module.js';
async function getBackupKey(backupID: string): Promise<Uint8Array> {
const nativeCredentials = await fetchNativeKeychainCredentials();
@@ -13,4 +18,17 @@
return new Uint8Array(backupKey);
}
-export { getBackupKey };
+async function encryptBackup(backup: Backup): Promise<BackupEncrypted> {
+ const { backupID, userKeys, userData } = backup;
+ const userKeysBytes = convertObjToBytes(userKeys);
+ const backupKey = await getBackupKey(backupID);
+ const ct1 = AES.encrypt(backupKey, userKeysBytes);
+
+ const userDataBytes = convertObjToBytes(userData);
+ const backupDataKey = hexToUintArray(userKeys.backupDataKey);
+ const ct2 = AES.encrypt(backupDataKey, userDataBytes);
+
+ return { backupID, userKeys: ct1, userData: ct2 };
+}
+
+export { getBackupKey, encryptBackup };

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