Our own code is proprietary and is not listed here.

MIT License

The following components are distributed under the MIT license. For components dual-licensed as “MIT OR Apache-2.0”, the MIT option is elected.

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

The following dalek-cryptography components (elliptic-curve cryptography) are distributed under the BSD-3-Clause license:

curve25519-dalek — Copyright (c) 2016–2021 isis agora lovecruft; Copyright (c) 2016–2021 Henry de Valence; Copyright (c) 2012 The Go Authors. All rights reserved.
x25519-dalek — Copyright (c) 2017–2021 isis agora lovecruft; Copyright (c) 2019–2021 DebugSteven. All rights reserved.
subtle — Copyright (c) 2016–2024 Isis Agora Lovecruft, Henry de Valence. All rights reserved.

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.

Android application — additional components

The Android application’s tunnel engine (Rust) and its currently bundled legacy native libraries include the following additional components on top of those listed above. Items marked “MIT elected” are dual- or multi-licensed and are used here under their MIT option; the MIT and BSD-3-Clause texts above apply to them accordingly.

tokio (MIT) — Copyright (c) Tokio Contributors
rustls (Apache-2.0 / MIT / ISC — MIT elected) — Copyright (c) The rustls contributors
ipstack (MIT OR Apache-2.0 — MIT elected) — Copyright (c) ipstack contributors
etherparse (MIT OR Apache-2.0 — MIT elected) — Copyright (c) etherparse contributors
jni-rs (MIT OR Apache-2.0 — MIT elected) — Copyright (c) 2016 Prevoty, Inc. and the jni-rs contributors
shadowsocks-rust (MIT) — Copyright (c) 2017 Y. T. CHUNG <zonyitoo@gmail.com>
redb (MIT OR Apache-2.0 — MIT elected) — Copyright (c) 2021 Christopher Berner
lwIP (BSD-3-Clause / Modified BSD) — Copyright (c) 2001–2004 Swedish Institute of Computer Science

Three further components carry composite, Apache-2.0 or file-level copyleft licenses. All are used unmodified via their public APIs, and none require the source of AstriaVPN itself to be disclosed:

ring — ISC-style terms for new code plus OpenSSL/BoringSSL-derived portions under their own terms. Full text: github.com/briansmith/ring
gVisor — Apache License 2.0. Full text: apache.org/licenses/LICENSE-2.0
Xray-core — Mozilla Public License 2.0 (file-level copyleft; applies only to modified MPL files, of which there are none here). Full text: mozilla.org/MPL/2.0