agent::server::serve(

            agent::server::ServerStream::serve(

use futures::stream::{Stream, StreamExt};

use futures::stream::Stream;

use tokio;
use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};
use tokio::time::sleep;

#[cfg(feature = "tokio-agent")]
pub mod tokio;
#[cfg(feature = "smol-agent")]
pub mod smol;

	KeyStore(self.0.clone())

        KeyStore(self.0.clone())

pub async fn serve<K, S, L, A>(mut listener: L, agent: A) -> Result<(), Error>

/// The main entry point for running a server, where `Self` is the type of stream that the server is backed by.
///
/// The backing implementations provided are:
///   * [`thrussh_agent::server::tokio`]
///   * [`thrussh_agent::server::smol`]
#[async_trait]
pub trait ServerStream

    K: Private + Send + Sync + 'static,
K::Error: std::error::Error + Send + Sync + 'static,
    S: AsyncRead + AsyncWrite + Send + Sync + Unpin + 'static,
    L: Stream<Item = tokio::io::Result<S>> + Unpin,
    A: Agent<K> + Send + Sync + 'static,

    Self: Sized + Send + Sync + Unpin + 'static,

    let keys = KeyStore(Arc::new(RwLock::new(HashMap::new())));
    let lock = Lock(Arc::new(RwLock::new(CryptoVec::new())));
    while let Some(Ok(stream)) = listener.next().await {
        let mut buf = CryptoVec::new();
        buf.resize(4);
        tokio::spawn(
            (Connection {
                lock: lock.clone(),
                keys: keys.clone(),
                agent: Some(agent.clone()),
                s: stream,
                buf: CryptoVec::new(),
            })
            .run(),
        );

    type Error;
    async fn serve<K, L, A>(listener: L, agent: A) -> Result<(), Error>
    where
        K: Private + Send + Sync + 'static,
        K::Error: std::error::Error + Send + Sync + 'static,
        L: Stream<Item = Result<Self, Self::Error>> + Send + Unpin,
        A: Agent<K> + Send + Sync + 'static;
}
/// A helper trait for revoking a key in an asynchronous manner.
///
/// The revoking should be done on a spawned thread, however, since we are avoiding
/// committing to a runtime we use this trait to allow for different `spawn` and `sleep` implementations.
///
/// Any implementation should just be of the form:
/// ```rust
/// spawn(async move { sleep(duration); revoke_key(keys, blob, now) });
/// ```
///
/// Where `revoke_key` is the function defined as [`crate::server::revoke_key`].
trait Revoker<K> {
    fn revoke(&self, keys: KeyStore<K>, blob: Vec<u8>, now: SystemTime, duration: Duration);
}
fn revoke_key<K>(keys: KeyStore<K>, blob: Vec<u8>, now: SystemTime) {
    let mut keys = keys.0.write().unwrap();
    let delete = if let Some(&(_, time, _)) = keys.get(&blob) {
        time == now
    } else {
        false
    };
    if delete {
        keys.remove(&blob);

    Ok(())

struct Connection<Key, S: AsyncRead + AsyncWrite + Send + 'static, A: Agent<Key>> {

struct Connection<Key, A: Agent<Key>> {

    s: S,

    revoker: Box<dyn Revoker<Key> + Send + Sync + 'static>,

impl<K, S, A> Connection<K, S, A>

impl<K, A> Connection<K, A>

K::Error: std::error::Error + Send + Sync + 'static,
    S: AsyncRead + AsyncWrite + Send + Unpin + 'static,

    K::Error: std::error::Error + Send + Sync + 'static,

    async fn run(mut self) -> Result<(), Error> {
        let mut writebuf = CryptoVec::new();
        loop {
            // Reading the length
            self.buf.clear();
            self.buf.resize(4);
            self.s.read_exact(&mut self.buf).await?;
            // Reading the rest of the buffer
            let len = BigEndian::read_u32(&self.buf) as usize;
            self.buf.clear();
            self.buf.resize(len);
            self.s.read_exact(&mut self.buf).await?;
            // respond
            writebuf.clear();
            self.respond(&mut writebuf).await?;
            self.s.write_all(&writebuf).await?;
            self.s.flush().await?
        }
    }
    async fn respond(&mut self, writebuf: &mut CryptoVec) -> Result<(), Error> {

    pub async fn respond(&mut self, writebuf: &mut CryptoVec) -> Result<(), Error> {

	    Some((blob, key)) => (blob, key),

            Some((blob, key)) => (blob, key),

	writebuf.push(msg::SUCCESS);

        writebuf.push(msg::SUCCESS);

                    tokio::spawn(async move {
                        sleep(Duration::from_secs(seconds as u64)).await;
                        let mut keys = keys.0.write().unwrap();
                        let delete = if let Some(&(_, time, _)) = keys.get(&blob) {
                            time == now
                        } else {
                            false
                        };
                        if delete {
                            keys.remove(&blob);
                        }
                    });

                    let duration = Duration::from_secs(seconds as u64);
                    self.revoker.revoke(keys, blob, now, duration);

        key.write_signature(writebuf, data).map_err(|err| Error::Private(Box::new(err)))?;

        key.write_signature(writebuf, data)
            .map_err(|err| Error::Private(Box::new(err)))?;

#[macro_use]
extern crate async_trait;

use super::msg;
use super::Constraint;
use crate::key::{Private, Public, Signature};

use std::fmt;
use std::path::Path;

use std::fmt;

use tokio;
use tokio::io::{AsyncRead, AsyncReadExt, AsyncWrite, AsyncWriteExt};

use super::msg;
use super::Constraint;
use crate::key::{Private, Public, Signature};
#[cfg(feature = "tokio-agent")]
pub mod tokio;

#[cfg(feature = "smol-agent")]
pub mod smol;

pub struct AgentClient<S: AsyncRead + AsyncWrite> {

pub struct AgentClient<S> {

impl<S: AsyncRead + AsyncWrite + Unpin> AgentClient<S> {

impl<S: Unpin> AgentClient<S> {

#[cfg(unix)]
impl AgentClient<tokio::net::UnixStream> {
    /// Build a future that connects to an SSH agent via the provided
    /// stream (on Unix, usually a Unix-domain socket).
    pub async fn connect_uds<P: AsRef<std::path::Path>>(path: P) -> Result<Self, Error> {
        let stream = tokio::net::UnixStream::connect(path).await?;
        Ok(AgentClient {
            stream,
            buf: CryptoVec::new(),
        })
    }

/// The backing stream for the agent, which is left generic so that dependents can pick their runtime representation.
///
/// The different runtime implemenations are:
///   * [`thrussh_agent::client::tokio`]
///   * [`thrussh_agent::client::smol`]
#[async_trait]
pub trait ClientStream: Sized + Send + Sync {
    /// How to connect the streaming socket
    async fn connect_uds<P>(path: P) -> Result<AgentClient<Self>, Error>
    where
        P: AsRef<Path> + Send;

    /// Build a future that connects to an SSH agent via the provided
    /// stream (on Unix, usually a Unix-domain socket).
    pub async fn connect_env() -> Result<Self, Error> {

    /// How to read the response from the stream
    async fn read_response(&mut self, buf: &mut CryptoVec) -> Result<(), Error>;
    async fn connect_env() -> Result<AgentClient<Self>, Error> {

#[cfg(not(unix))]
impl AgentClient<tokio::net::TcpStream> {
    /// Build a future that connects to an SSH agent via the provided
    /// stream (on Unix, usually a Unix-domain socket).
    pub async fn connect_env() -> Result<Self, Error> {
        Err(Error::AgentFailure)
    }
}
impl<S: AsyncRead + AsyncWrite + Unpin> AgentClient<S> {
    async fn read_response(&mut self) -> Result<(), Error> {
        // Writing the message
        self.stream.write_all(&self.buf).await?;
        self.stream.flush().await?;
        // Reading the length
        self.buf.clear();
        self.buf.resize(4);
        self.stream.read_exact(&mut self.buf).await?;
        // Reading the rest of the buffer
        let len = BigEndian::read_u32(&self.buf) as usize;
        self.buf.clear();
        self.buf.resize(len);
        self.stream.read_exact(&mut self.buf).await?;
        Ok(())
    }

impl<S: ClientStream + Unpin> AgentClient<S> {

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

            let resp = self.read_response().await;

            let resp = self.stream.read_response(&mut self.buf).await;

            let resp = self.read_response().await;

            let resp = self.stream.read_response(&mut self.buf).await;

        Sig::Error: std::error::Error + Send + Sync +
	'static,

        Sig::Error: std::error::Error + Send + Sync + 'static,

            if let Err(e) = self.read_response().await {

            if let Err(e) = self.stream.read_response(&mut self.buf).await {

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

        self.read_response().await?;

        self.stream.read_response(&mut self.buf).await?;

impl<R: AsyncRead + AsyncWrite + Unpin + Send + 'static> Signer
    for thrussh_agent::client::AgentClient<R>

impl<R: thrussh_agent::client::ClientStream + AsyncRead + AsyncWrite + Unpin + Send + 'static>
    Signer for thrussh_agent::client::AgentClient<R>

use thrussh_agent::client::ClientStream;

        let mut agent = thrussh_agent::client::AgentClient::connect_env().await?;

        let mut agent = tokio::net::UnixStream::connect_env().await?;

use thrussh_agent::client::ClientStream;

    let mut agent = thrussh_agent::client::AgentClient::connect_env()
        .await
        .unwrap();

    let mut agent = tokio::net::UnixStream::connect_env().await.unwrap();