370 lines
14 KiB
Rust
370 lines
14 KiB
Rust
use crate::Error;
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use ruma::{
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api::OutgoingResponse,
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identifiers::{DeviceId, UserId},
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Outgoing,
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};
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use std::ops::Deref;
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#[cfg(feature = "conduit_bin")]
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use {
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crate::{server_server, utils},
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log::{debug, warn},
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rocket::{
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data::{
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ByteUnit, Data, FromDataFuture, FromTransformedData, Transform, TransformFuture,
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Transformed,
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},
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http::Status,
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outcome::Outcome::*,
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response::{self, Responder},
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tokio::io::AsyncReadExt,
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Request, State,
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},
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ruma::{
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api::{AuthScheme, IncomingRequest},
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signatures::CanonicalJsonValue,
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ServerName,
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},
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std::collections::BTreeMap,
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std::convert::TryFrom,
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std::io::Cursor,
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};
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/// This struct converts rocket requests into ruma structs by converting them into http requests
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/// first.
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pub struct Ruma<T: Outgoing> {
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pub body: T::Incoming,
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pub sender_user: Option<UserId>,
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pub sender_device: Option<Box<DeviceId>>,
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pub json_body: Option<Box<serde_json::value::RawValue>>, // This is None when body is not a valid string
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pub from_appservice: bool,
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}
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#[cfg(feature = "conduit_bin")]
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impl<'a, T: Outgoing> FromTransformedData<'a> for Ruma<T>
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where
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T::Incoming: IncomingRequest,
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{
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type Error = ();
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type Owned = Data;
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type Borrowed = Self::Owned;
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fn transform<'r>(
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_req: &'r Request<'_>,
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data: Data,
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) -> TransformFuture<'r, Self::Owned, Self::Error> {
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Box::pin(async move { Transform::Owned(Success(data)) })
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}
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fn from_data(
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request: &'a Request<'_>,
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outcome: Transformed<'a, Self>,
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) -> FromDataFuture<'a, Self, Self::Error> {
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let metadata = T::Incoming::METADATA;
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Box::pin(async move {
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let data = rocket::try_outcome!(outcome.owned());
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let db = request
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.guard::<State<'_, crate::Database>>()
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.await
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.expect("database was loaded");
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// Get token from header or query value
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let token = request
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.headers()
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.get_one("Authorization")
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.map(|s| s[7..].to_owned()) // Split off "Bearer "
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.or_else(|| request.get_query_value("access_token").and_then(|r| r.ok()));
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let limit = db.globals.max_request_size();
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let mut handle = data.open(ByteUnit::Byte(limit.into()));
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let mut body = Vec::new();
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handle.read_to_end(&mut body).await.unwrap();
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let (sender_user, sender_device, from_appservice) = if let Some((_id, registration)) =
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db.appservice
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.iter_all()
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.filter_map(|r| r.ok())
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.find(|(_id, registration)| {
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registration
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.get("as_token")
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.and_then(|as_token| as_token.as_str())
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.map_or(false, |as_token| token.as_deref() == Some(as_token))
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}) {
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match metadata.authentication {
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AuthScheme::AccessToken | AuthScheme::QueryOnlyAccessToken => {
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let user_id = request.get_query_value::<String>("user_id").map_or_else(
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|| {
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UserId::parse_with_server_name(
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registration
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.get("sender_localpart")
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.unwrap()
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.as_str()
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.unwrap(),
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db.globals.server_name(),
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)
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.unwrap()
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},
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|string| {
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UserId::try_from(string.expect("parsing to string always works"))
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.unwrap()
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},
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);
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if !db.users.exists(&user_id).unwrap() {
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// Forbidden
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return Failure((Status::raw(580), ()));
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}
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// TODO: Check if appservice is allowed to be that user
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(Some(user_id), None, true)
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}
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AuthScheme::ServerSignatures => (None, None, true),
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AuthScheme::None => (None, None, true),
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}
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} else {
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match metadata.authentication {
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AuthScheme::AccessToken | AuthScheme::QueryOnlyAccessToken => {
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if let Some(token) = token {
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match db.users.find_from_token(&token).unwrap() {
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// Unknown Token
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None => return Failure((Status::raw(581), ())),
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Some((user_id, device_id)) => {
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(Some(user_id), Some(device_id.into()), false)
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}
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}
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} else {
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// Missing Token
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return Failure((Status::raw(582), ()));
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}
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}
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AuthScheme::ServerSignatures => {
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// Get origin from header
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let x_matrix = match request
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.headers()
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.get_one("Authorization")
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.map(|s| {
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s[9..]
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.split_terminator(',').map(|field| {let mut splits = field.splitn(2, '='); (splits.next(), splits.next().map(|s| s.trim_matches('"')))}).collect::<BTreeMap<_, _>>()
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}) // Split off "X-Matrix " and parse the rest
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{
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Some(t) => t,
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None => {
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warn!("No Authorization header");
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// Forbidden
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return Failure((Status::raw(580), ()));
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}
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};
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let origin_str = match x_matrix.get(&Some("origin")) {
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Some(Some(o)) => *o,
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_ => {
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warn!("Invalid X-Matrix header origin field: {:?}", x_matrix);
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// Forbidden
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return Failure((Status::raw(580), ()));
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}
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};
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let origin = match Box::<ServerName>::try_from(origin_str) {
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Ok(s) => s,
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_ => {
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warn!(
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"Invalid server name in X-Matrix header origin field: {:?}",
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x_matrix
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);
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// Forbidden
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return Failure((Status::raw(580), ()));
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}
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};
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let key = match x_matrix.get(&Some("key")) {
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Some(Some(k)) => *k,
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_ => {
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warn!("Invalid X-Matrix header key field: {:?}", x_matrix);
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// Forbidden
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return Failure((Status::raw(580), ()));
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}
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};
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let sig = match x_matrix.get(&Some("sig")) {
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Some(Some(s)) => *s,
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_ => {
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warn!("Invalid X-Matrix header sig field: {:?}", x_matrix);
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// Forbidden
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return Failure((Status::raw(580), ()));
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}
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};
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let json_body = serde_json::from_slice::<CanonicalJsonValue>(&body);
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let mut request_map = BTreeMap::<String, CanonicalJsonValue>::new();
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if let Ok(json_body) = json_body {
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request_map.insert("content".to_owned(), json_body);
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};
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request_map.insert(
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"method".to_owned(),
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CanonicalJsonValue::String(request.method().to_string()),
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);
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request_map.insert(
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"uri".to_owned(),
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CanonicalJsonValue::String(request.uri().to_string()),
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);
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request_map.insert(
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"origin".to_owned(),
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CanonicalJsonValue::String(origin.as_str().to_owned()),
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);
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request_map.insert(
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"destination".to_owned(),
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CanonicalJsonValue::String(
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db.globals.server_name().as_str().to_owned(),
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),
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);
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let mut origin_signatures = BTreeMap::new();
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origin_signatures
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.insert(key.to_owned(), CanonicalJsonValue::String(sig.to_owned()));
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let mut signatures = BTreeMap::new();
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signatures.insert(
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origin.as_str().to_owned(),
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CanonicalJsonValue::Object(origin_signatures),
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);
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request_map.insert(
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"signatures".to_owned(),
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CanonicalJsonValue::Object(signatures),
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);
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let keys = match server_server::fetch_signing_keys(
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&db,
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&origin,
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vec![&key.to_owned()],
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)
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.await
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{
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Ok(b) => b,
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Err(e) => {
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warn!("Failed to fetch signing keys: {}", e);
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// Forbidden
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return Failure((Status::raw(580), ()));
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}
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};
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let mut pub_key_map = BTreeMap::new();
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pub_key_map.insert(origin.as_str().to_owned(), keys);
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match ruma::signatures::verify_json(&pub_key_map, &request_map) {
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Ok(()) => (None, None, false),
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Err(e) => {
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warn!(
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"Failed to verify json request: {}: {:?} {:?}",
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e, pub_key_map, request_map
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);
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// Forbidden
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return Failure((Status::raw(580), ()));
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}
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}
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}
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AuthScheme::None => (None, None, false),
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}
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};
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let mut http_request = http::Request::builder()
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.uri(request.uri().to_string())
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.method(&*request.method().to_string());
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for header in request.headers().iter() {
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http_request = http_request.header(header.name.as_str(), &*header.value);
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}
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let http_request = http_request.body(&*body).unwrap();
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debug!("{:?}", http_request);
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match <T::Incoming as IncomingRequest>::try_from_http_request(http_request) {
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Ok(t) => Success(Ruma {
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body: t,
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sender_user,
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sender_device,
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// TODO: Can we avoid parsing it again? (We only need this for append_pdu)
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json_body: utils::string_from_bytes(&body)
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.ok()
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.and_then(|s| serde_json::value::RawValue::from_string(s).ok()),
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from_appservice,
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}),
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Err(e) => {
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warn!("{:?}", e);
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Failure((Status::raw(583), ()))
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}
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}
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})
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}
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}
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impl<T: Outgoing> Deref for Ruma<T> {
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type Target = T::Incoming;
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fn deref(&self) -> &Self::Target {
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&self.body
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}
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}
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/// This struct converts ruma responses into rocket http responses.
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pub type ConduitResult<T> = std::result::Result<RumaResponse<T>, Error>;
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pub struct RumaResponse<T: OutgoingResponse>(pub T);
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impl<T: OutgoingResponse> From<T> for RumaResponse<T> {
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fn from(t: T) -> Self {
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Self(t)
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}
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}
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#[cfg(feature = "conduit_bin")]
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impl<'r, 'o, T> Responder<'r, 'o> for RumaResponse<T>
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where
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T: Send + OutgoingResponse,
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'o: 'r,
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{
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fn respond_to(self, _: &'r Request<'_>) -> response::Result<'o> {
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let http_response: Result<http::Response<_>, _> = self.0.try_into_http_response();
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match http_response {
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Ok(http_response) => {
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let mut response = rocket::response::Response::build();
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let status = http_response.status();
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response.raw_status(status.into(), "");
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for header in http_response.headers() {
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response
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.raw_header(header.0.to_string(), header.1.to_str().unwrap().to_owned());
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}
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let http_body = http_response.into_body();
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response.sized_body(http_body.len(), Cursor::new(http_body));
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response.raw_header("Access-Control-Allow-Origin", "*");
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response.raw_header(
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"Access-Control-Allow-Methods",
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"GET, POST, PUT, DELETE, OPTIONS",
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);
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response.raw_header(
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"Access-Control-Allow-Headers",
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"Origin, X-Requested-With, Content-Type, Accept, Authorization",
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);
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response.raw_header("Access-Control-Max-Age", "86400");
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response.ok()
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}
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Err(_) => Err(Status::InternalServerError),
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}
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}
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}
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