我们的自有代码为专有代码，不在任何一份清单之列。

MIT License

以下组件依据 MIT 许可证分发。对于采用“MIT OR Apache-2.0”双重许可的组件，我们选择 MIT 选项。

RustCrypto — aead, aes, aes-gcm, block-buffer, chacha20, chacha20poly1305, cipher, cpufeatures, crypto-common, ctr, digest, ghash, hkdf, hmac, inout, opaque-debug, poly1305, polyval, sha2, typenum, universal-hash, zeroize
Copyright (c) 2016–2026 The RustCrypto Project Developers; Copyright (c) 2017–2022 Artyom Pavlov; Copyright (c) 2019 MobileCoin, LLC; Copyright (c) 2015–2018 Vlad Filippov; Copyright (c) 2006–2009 Graydon Hoare; Copyright (c) 2014 Paho Lurie-Gregg
generic-array — Copyright (c) 2015 Bartłomiej Kamiński
rand (rand, rand_chacha, rand_core, getrandom) — Copyright (c) 2014 The Rust Project Developers; Copyright 2018 Developers of the Rand project
ppv-lite86 — Copyright (c) 2019 The CryptoCorrosion Contributors
libc — Copyright (c) The Rust Project Developers
cfg-if — Copyright (c) 2014 Alex Crichton
thiserror — Copyright (c) 2019 David Tolnay
zerocopy — Copyright 2019–2023 The Fuchsia Authors (multi-licensed; used under MIT)

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

BSD-3-Clause License

以下 dalek-cryptography 组件（椭圆曲线密码学）依据 BSD-3-Clause 许可证分发：

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
   list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors
   may be used to endorse or promote products derived from this software
   without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

不使用传输层

与其他客户端不同，iOS 引擎不链接 tokio、rustls 或 ipstack——iOS 上根本不需要这些依赖，网络由系统的 NWConnection 处理。