雪暴

基于 Noise 协议 和 snow 的 Rust 异步流/数据包的极简加密协议。

快速入门

雪暴允许您为任何实现了 AsyncRead + AsyncWrite + Unpin 的流提供安全性。例如，Tokio 中的 TcpStream。注意，底层连接需要是可靠的。

创建密钥对

// Noise protocol params, see: http://www.noiseprotocol.org/noise.html#protocol-names-and-modifiers
// Use `KK` to enable bidirectional identity verification
static PATTERN: &str = "Noise_KK_25519_ChaChaPoly_BLAKE2s"; 

// Generate a private / public key pair
let key_pair = snowstorm::Builder::new(PATTERN.parse()?).generate_keypair().unwrap()

客户端

// Connect to the peer
let stream = TcpStream::connect("127.0.0.1:12345").await?;

// The client should build an initiator to launch the handshake process
let initiator = snowstorm::Builder::new(PATTERN.parse()?)
    .local_private_key(local_private_key)
    .remote_public_key(remote_public_key)
    .build_initiator()?;

// Start handshaking
let mut secured_stream = NoiseStream::handshake(stream, initiator).await?;

// A secured stream `NoiseStream<T>` will be return once the handshake is done
secured_stream.write_all(b"hello world").await?;

服务器

// Accept a `TcpStream` from the listener
let listener = TcpListener::bind("127.0.0.1:12345").await?;
let (stream, _) = listener.accept().await?;

// The server needs a responder to handle handshake reqeusts from clients
let responder = snowstorm::Builder::new(PATTERN.parse()?)
    .local_private_key(local_private_key)
    .remote_public_key(remote_public_key)
    .build_responder()?;

// Start handshaking
let mut secured_stream = NoiseStream::handshake(stream, responder).await?;

let mut buf = [0; 1024];
secured_stream.read(&mut buf).await?;

规范

流

[ length (2 字节，小端) ] [ noise message (length 字节) ]

数据包

[ nonce (8 字节) ] [ noise message ]

待办事项

• UDP 支持
• 文档
• 基准测试
• async-std 支持