MEGA SDK

Overview

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MEGA SDK (Client Access Engine) is a C++ development kit provided by the MEGA cloud storage service. It allows developers to build their own client applications or analyze the security of MEGA products. MEGA uses User Controlled Encryption (UCE). All files stored on MEGA and data in transit are end-to-end encrypted. Unlike most cloud storage services where the provider holds the decryption keys, MEGA's encryption keys are controlled entirely by users, who decide who can access their files. ## SDK Components The SDK consists of three main parts: - **Low-level SDK**: The core component, open-sourced months after MEGA's launch. - **Middle layer**: An API layer designed to simplify usage and enable bindings for other programming languages. Documentation is generated via Doxygen, with the core header file at `include/megaapi.h`. - **Example apps**: Covering Android, GNU/Linux, iOS, macOS, and Windows platforms. ## Examples and Tools - `megacli`: A command-line tool based on the low-level SDK, supporting all SDK features. - `examples/simple_client`: A pure C++ example app using the public API. - `examples/android`: An Android example app using SWIG-based Java bindings. - `examples/iOS`: An iOS example app using Objective-C bindings. - [MEGAcmd](https://github.com/meganz/megacmd): A high-level command-line application built on this SDK, scriptable via languages like PHP/Python. ## Building The project uses CMake (3.19 or later) as the cross-platform configuration tool and VCPKG to manage third-party dependencies. Supported operating systems include Windows 10, macOS 10.15+, various GNU/Linux distributions, Android 9.0+, and iOS 15+. ## Folder Sync Limitations The current sync implementation has several limitations: no locking mechanism when multiple clients concurrently access the same remote folder; potential data loss when syncing between different filesystem naming semantics; no incremental writes, so modified files are fully overwritten; deleted remote files are moved to `//bin/SyncDebris`.

Q&A

What programming language is MEGA SDK written in?AI-generated

MEGA SDK is written in C++.

How do I build MEGA SDK?AI-generated

You need CMake (3.19 or later) and VCPKG. Clone the SDK and VCPKG repositories, run the cmake command to configure the project, and then compile it using cmake --build.

Which platforms does the SDK support?AI-generated

It supports Android 9.0+, iOS 15+, macOS 10.15+ (Intel) / 11.1+ (Apple silicon), Windows 10 / Server 2019, and various GNU/Linux distributions (such as Debian 11, Ubuntu 20.04 LTS, Fedora 40, etc.).

Is there documentation for the low-level SDK?AI-generated

The low-level SDK currently lacks inline documentation; refer to the example app examples/megacli to understand its usage. The middle-layer API documentation is generated with Doxygen, and the core header file is include/megaapi.h.

How does MEGA's encryption work?AI-generated

MEGA uses User Controlled Encryption (UCE), meaning all stored and transferred data is end-to-end encrypted. Unlike industry norms, the decryption keys are held by users themselves, not by the cloud storage provider.

What are the known limitations of the sync feature?AI-generated

There is no locking mechanism when multiple clients access the same remote folder; syncing between different filesystem naming semantics may cause data loss; filenames on POSIX platforms must be UTF-8 encoded; incremental writes are not supported, so modified files are fully overwritten.