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use std::sync::Arc;
use crate::{
channel::Message,
error::Error,
hub::Hub,
permission::ChannelPermission,
server::{Server, ServerNotification},
};
use crate::{server::client_command, ID};
use crate::{server::HubUpdateType, signing::KeyPair};
use futures_util::{SinkExt, StreamExt};
use pgp::{crypto::HashAlgorithm, types::CompressionAlgorithm, Message as OpenPGPMessage};
use pgp::{packet::LiteralData, types::KeyTrait, SignedPublicKey};
use tokio::sync::Mutex;
use warp::ws::WebSocket;
use xactor::Addr;
use crate::error::Result;
use serde::{Deserialize, Serialize};
pub use warp::ws::Message as WebSocketMessage;
/// Messages that can be sent to the server by the client
#[derive(Serialize, Deserialize, Clone, Debug)]
pub enum ClientMessage {
SubscribeHub {
hub_id: ID,
},
UnsubscribeHub {
hub_id: ID,
},
SubscribeChannel {
hub_id: ID,
channel_id: ID,
},
UnsubscribeChannel {
hub_id: ID,
channel_id: ID,
},
StartTyping {
hub_id: ID,
channel_id: ID,
},
StopTyping {
hub_id: ID,
channel_id: ID,
},
SendMessageInit {
hub_id: ID,
channel_id: ID,
content: String,
},
SendMessage {
signed_message: String,
},
}
/// Messages that the server can send to clients.
#[derive(Serialize, Deserialize, Clone, Debug)]
pub enum ServerMessage {
Error(String),
InvalidCommand,
NotSigned,
CommandFailed,
ChatMessage {
hub_id: ID,
channel_id: ID,
message_id: ID,
armoured_message: String,
},
HubUpdated {
hub_id: ID,
update_type: HubUpdateType,
},
Success,
UserStartedTyping {
user_id: String,
hub_id: ID,
channel_id: ID,
},
UserStoppedTyping {
user_id: String,
hub_id: ID,
channel_id: ID,
},
MessageForSigning {
server_signed_message: String,
},
}
pub async fn handle_connection(
websocket: WebSocket,
public_key: SignedPublicKey,
server_keys: Arc<KeyPair>,
addr: Arc<Addr<Server>>,
) -> Result {
let (mut outgoing, mut incoming) = websocket.split();
let key = rand::random::<u128>().to_string();
let message = OpenPGPMessage::Literal(LiteralData::from_str("auth_key", &key)).sign(
&server_keys.secret_key,
String::new,
HashAlgorithm::SHA2_256,
)?;
outgoing
.send(WebSocketMessage::text(message.to_armored_string(None)?))
.await?;
if let Some(msg) = incoming.next().await {
let msg = msg?;
if let Ok(text) = msg.to_str() {
let message = crate::signing::verify_message_extract(&public_key, text)?.0;
if message == key {
drop((message, key, text));
drop(msg);
let out_arc = Arc::new(Mutex::new(outgoing));
let connection_id: u128;
{
let result = addr
.call(client_command::Connect {
websocket_writer: out_arc.clone(),
})
.await
.map_err(|_| Error::InternalMessageFailed)?;
connection_id = result;
}
let user_id = hex::encode_upper(public_key.fingerprint());
let internal_message_error = Error::InternalMessageFailed.to_string();
while let Some(msg) = incoming.next().await {
let msg = msg?;
if let Ok(text) = msg.to_str() {
let raw_response = if let Ok((command_text, _)) =
crate::signing::verify_message_extract(&public_key, text)
{
if let Ok(command) = serde_json::from_str(&command_text) {
match command {
ClientMessage::SubscribeChannel { hub_id, channel_id } => {
if let Ok(result) = addr
.call(client_command::SubscribeChannel {
user_id: user_id.clone(),
hub_id,
channel_id,
connection_id,
})
.await
{
result.map_or_else(
|err| ServerMessage::Error(err.to_string()),
|_| ServerMessage::Success,
)
} else {
ServerMessage::Error(internal_message_error.clone())
}
}
ClientMessage::UnsubscribeChannel { hub_id, channel_id } => {
if addr
.call(client_command::UnsubscribeChannel {
hub_id,
channel_id,
connection_id,
})
.await
.is_ok()
{
ServerMessage::Success
} else {
ServerMessage::Error(internal_message_error.clone())
}
}
ClientMessage::StartTyping { hub_id, channel_id } => {
if let Ok(result) = addr
.call(client_command::StartTyping {
user_id: user_id.clone(),
hub_id,
channel_id,
})
.await
{
result.map_or_else(
|err| ServerMessage::Error(err.to_string()),
|_| ServerMessage::Success,
)
} else {
ServerMessage::Error(internal_message_error.clone())
}
}
ClientMessage::StopTyping { hub_id, channel_id } => {
if let Ok(result) = addr
.call(client_command::StopTyping {
user_id: user_id.clone(),
hub_id,
channel_id,
})
.await
{
result.map_or_else(
|err| ServerMessage::Error(err.to_string()),
|_| ServerMessage::Success,
)
} else {
ServerMessage::Error(internal_message_error.clone())
}
}
ClientMessage::SubscribeHub { hub_id } => {
if let Ok(result) = addr
.call(client_command::SubscribeHub {
user_id: user_id.clone(),
hub_id,
connection_id,
})
.await
{
result.map_or_else(
|err| ServerMessage::Error(err.to_string()),
|_| ServerMessage::Success,
)
} else {
ServerMessage::Error(internal_message_error.clone())
}
}
ClientMessage::UnsubscribeHub { hub_id } => {
if addr
.call(client_command::UnsubscribeHub {
hub_id,
connection_id,
})
.await
.is_ok()
{
ServerMessage::Success
} else {
ServerMessage::Error(internal_message_error.clone())
}
}
ClientMessage::SendMessageInit {
hub_id,
channel_id,
content,
} => {
let hub = Hub::load(hub_id).await?;
let member = hub.get_member(&user_id)?;
crate::check_permission!(
&member,
channel_id,
ChannelPermission::Write,
&hub
);
ServerMessage::MessageForSigning {
server_signed_message: Message::new(
user_id.clone(),
content,
hub_id,
channel_id,
)
.sign(&server_keys.secret_key, String::new)?
.compress(CompressionAlgorithm::ZIP)?
.to_armored_string(None)?,
}
}
ClientMessage::SendMessage { signed_message } => {
let message = Message::from_double_signed_verify(
&signed_message,
&server_keys.public_key,
&public_key,
)?;
if let Err(err) = crate::channel::Channel::write_message(
message.hub_id,
message.channel_id,
crate::channel::SignedMessage::new(
message.id,
message.created,
signed_message.clone(),
),
)
.await
{
ServerMessage::Error(err.to_string())
} else if addr
.call(ServerNotification::NewMessage(
message.hub_id,
message.channel_id,
message.id,
signed_message,
message,
))
.await
.is_ok()
{
ServerMessage::Success
} else {
ServerMessage::Error(internal_message_error.clone())
}
}
}
} else {
ServerMessage::InvalidCommand
}
} else {
ServerMessage::NotSigned
};
let message = OpenPGPMessage::new_literal(
"",
serde_json::to_string(&raw_response)?.as_str(),
)
.sign(
&server_keys.secret_key,
String::new,
HashAlgorithm::SHA2_256,
)?
.compress(CompressionAlgorithm::ZIP)?;
out_arc
.lock()
.await
.send(WebSocketMessage::text(message.to_armored_string(None)?))
.await?;
}
}
return Ok(());
}
}
}
Err(Error::WsNotAuthenticated)
}