615 lines
20 KiB
Rust
615 lines
20 KiB
Rust
use std::collections::HashMap;
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use std::future::Future;
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use std::hash::BuildHasher;
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use std::path::{Path, PathBuf};
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use std::pin::Pin;
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use std::sync::Arc;
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use std::task::{Context, Poll};
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use anyhow::{bail, format_err, Error};
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use futures::future::{self, FutureExt, TryFutureExt};
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use futures::stream::TryStreamExt;
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use hyper::header;
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use hyper::http::request::Parts;
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use hyper::{Body, Request, Response, StatusCode};
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use serde_json::{json, Value};
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use tokio::fs::File;
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use tokio::time::Instant;
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use url::form_urlencoded;
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use proxmox::http_err;
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use proxmox::api::{ApiHandler, ApiMethod, HttpError};
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use proxmox::api::{RpcEnvironment, RpcEnvironmentType, check_api_permission};
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use proxmox::api::schema::{ObjectSchema, parse_simple_value, verify_json_object, parse_parameter_strings};
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use super::environment::RestEnvironment;
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use super::formatter::*;
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use super::ApiConfig;
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use crate::auth_helpers::*;
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use crate::api2::types::Userid;
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use crate::tools;
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use crate::tools::ticket::Ticket;
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use crate::config::cached_user_info::CachedUserInfo;
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extern "C" { fn tzset(); }
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pub struct RestServer {
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pub api_config: Arc<ApiConfig>,
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}
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impl RestServer {
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pub fn new(api_config: ApiConfig) -> Self {
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Self { api_config: Arc::new(api_config) }
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}
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}
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impl tower_service::Service<&tokio_openssl::SslStream<tokio::net::TcpStream>> for RestServer {
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type Response = ApiService;
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type Error = Error;
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type Future = Pin<Box<dyn Future<Output = Result<ApiService, Error>> + Send>>;
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fn poll_ready(&mut self, _cx: &mut Context) -> Poll<Result<(), Self::Error>> {
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Poll::Ready(Ok(()))
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}
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fn call(&mut self, ctx: &tokio_openssl::SslStream<tokio::net::TcpStream>) -> Self::Future {
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match ctx.get_ref().peer_addr() {
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Err(err) => {
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future::err(format_err!("unable to get peer address - {}", err)).boxed()
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}
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Ok(peer) => {
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future::ok(ApiService { peer, api_config: self.api_config.clone() }).boxed()
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}
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}
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}
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}
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impl tower_service::Service<&tokio::net::TcpStream> for RestServer {
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type Response = ApiService;
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type Error = Error;
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type Future = Pin<Box<dyn Future<Output = Result<ApiService, Error>> + Send>>;
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fn poll_ready(&mut self, _cx: &mut Context) -> Poll<Result<(), Self::Error>> {
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Poll::Ready(Ok(()))
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}
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fn call(&mut self, ctx: &tokio::net::TcpStream) -> Self::Future {
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match ctx.peer_addr() {
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Err(err) => {
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future::err(format_err!("unable to get peer address - {}", err)).boxed()
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}
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Ok(peer) => {
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future::ok(ApiService { peer, api_config: self.api_config.clone() }).boxed()
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}
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}
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}
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}
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pub struct ApiService {
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pub peer: std::net::SocketAddr,
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pub api_config: Arc<ApiConfig>,
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}
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fn log_response(
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peer: &std::net::SocketAddr,
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method: hyper::Method,
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path: &str,
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resp: &Response<Body>,
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) {
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if resp.extensions().get::<NoLogExtension>().is_some() { return; };
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let status = resp.status();
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if !(status.is_success() || status.is_informational()) {
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let reason = status.canonical_reason().unwrap_or("unknown reason");
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let mut message = "request failed";
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if let Some(data) = resp.extensions().get::<ErrorMessageExtension>() {
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message = &data.0;
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}
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log::error!("{} {}: {} {}: [client {}] {}", method.as_str(), path, status.as_str(), reason, peer, message);
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}
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}
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impl tower_service::Service<Request<Body>> for ApiService {
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type Response = Response<Body>;
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type Error = Error;
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type Future = Pin<Box<dyn Future<Output = Result<Response<Body>, Self::Error>> + Send>>;
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fn poll_ready(&mut self, _cx: &mut Context) -> Poll<Result<(), Self::Error>> {
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Poll::Ready(Ok(()))
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}
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fn call(&mut self, req: Request<Body>) -> Self::Future {
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let path = req.uri().path().to_owned();
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let method = req.method().clone();
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let peer = self.peer;
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handle_request(self.api_config.clone(), req)
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.map(move |result| match result {
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Ok(res) => {
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log_response(&peer, method, &path, &res);
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Ok::<_, Self::Error>(res)
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}
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Err(err) => {
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if let Some(apierr) = err.downcast_ref::<HttpError>() {
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let mut resp = Response::new(Body::from(apierr.message.clone()));
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*resp.status_mut() = apierr.code;
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log_response(&peer, method, &path, &resp);
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Ok(resp)
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} else {
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let mut resp = Response::new(Body::from(err.to_string()));
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*resp.status_mut() = StatusCode::BAD_REQUEST;
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log_response(&peer, method, &path, &resp);
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Ok(resp)
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}
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}
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})
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.boxed()
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}
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}
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fn parse_query_parameters<S: 'static + BuildHasher + Send>(
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param_schema: &ObjectSchema,
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form: &str, // x-www-form-urlencoded body data
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parts: &Parts,
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uri_param: &HashMap<String, String, S>,
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) -> Result<Value, Error> {
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let mut param_list: Vec<(String, String)> = vec![];
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if !form.is_empty() {
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for (k, v) in form_urlencoded::parse(form.as_bytes()).into_owned() {
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param_list.push((k, v));
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}
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}
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if let Some(query_str) = parts.uri.query() {
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for (k, v) in form_urlencoded::parse(query_str.as_bytes()).into_owned() {
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if k == "_dc" { continue; } // skip extjs "disable cache" parameter
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param_list.push((k, v));
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}
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}
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for (k, v) in uri_param {
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param_list.push((k.clone(), v.clone()));
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}
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let params = parse_parameter_strings(¶m_list, param_schema, true)?;
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Ok(params)
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}
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async fn get_request_parameters<S: 'static + BuildHasher + Send>(
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param_schema: &ObjectSchema,
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parts: Parts,
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req_body: Body,
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uri_param: HashMap<String, String, S>,
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) -> Result<Value, Error> {
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let mut is_json = false;
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if let Some(value) = parts.headers.get(header::CONTENT_TYPE) {
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match value.to_str().map(|v| v.split(';').next()) {
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Ok(Some("application/x-www-form-urlencoded")) => {
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is_json = false;
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}
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Ok(Some("application/json")) => {
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is_json = true;
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}
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_ => bail!("unsupported content type {:?}", value.to_str()),
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}
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}
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let body = req_body
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.map_err(|err| http_err!(BAD_REQUEST, "Promlems reading request body: {}", err))
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.try_fold(Vec::new(), |mut acc, chunk| async move {
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if acc.len() + chunk.len() < 64*1024 { //fimxe: max request body size?
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acc.extend_from_slice(&*chunk);
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Ok(acc)
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} else {
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Err(http_err!(BAD_REQUEST, "Request body too large"))
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}
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}).await?;
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let utf8_data = std::str::from_utf8(&body)
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.map_err(|err| format_err!("Request body not uft8: {}", err))?;
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if is_json {
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let mut params: Value = serde_json::from_str(utf8_data)?;
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for (k, v) in uri_param {
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if let Some((_optional, prop_schema)) = param_schema.lookup(&k) {
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params[&k] = parse_simple_value(&v, prop_schema)?;
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}
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}
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verify_json_object(¶ms, param_schema)?;
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return Ok(params);
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} else {
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parse_query_parameters(param_schema, utf8_data, &parts, &uri_param)
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}
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}
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struct NoLogExtension();
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async fn proxy_protected_request(
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info: &'static ApiMethod,
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mut parts: Parts,
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req_body: Body,
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) -> Result<Response<Body>, Error> {
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let mut uri_parts = parts.uri.clone().into_parts();
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uri_parts.scheme = Some(http::uri::Scheme::HTTP);
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uri_parts.authority = Some(http::uri::Authority::from_static("127.0.0.1:82"));
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let new_uri = http::Uri::from_parts(uri_parts).unwrap();
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parts.uri = new_uri;
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let request = Request::from_parts(parts, req_body);
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let reload_timezone = info.reload_timezone;
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let resp = hyper::client::Client::new()
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.request(request)
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.map_err(Error::from)
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.map_ok(|mut resp| {
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resp.extensions_mut().insert(NoLogExtension());
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resp
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})
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.await?;
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if reload_timezone { unsafe { tzset(); } }
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Ok(resp)
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}
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pub async fn handle_api_request<Env: RpcEnvironment, S: 'static + BuildHasher + Send>(
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mut rpcenv: Env,
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info: &'static ApiMethod,
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formatter: &'static OutputFormatter,
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parts: Parts,
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req_body: Body,
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uri_param: HashMap<String, String, S>,
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) -> Result<Response<Body>, Error> {
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let delay_unauth_time = std::time::Instant::now() + std::time::Duration::from_millis(3000);
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let result = match info.handler {
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ApiHandler::AsyncHttp(handler) => {
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let params = parse_query_parameters(info.parameters, "", &parts, &uri_param)?;
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(handler)(parts, req_body, params, info, Box::new(rpcenv)).await
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}
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ApiHandler::Sync(handler) => {
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let params = get_request_parameters(info.parameters, parts, req_body, uri_param).await?;
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(handler)(params, info, &mut rpcenv)
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.map(|data| (formatter.format_data)(data, &rpcenv))
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}
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ApiHandler::Async(handler) => {
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let params = get_request_parameters(info.parameters, parts, req_body, uri_param).await?;
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(handler)(params, info, &mut rpcenv)
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.await
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.map(|data| (formatter.format_data)(data, &rpcenv))
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}
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};
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let resp = match result {
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Ok(resp) => resp,
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Err(err) => {
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if let Some(httperr) = err.downcast_ref::<HttpError>() {
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if httperr.code == StatusCode::UNAUTHORIZED {
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tokio::time::delay_until(Instant::from_std(delay_unauth_time)).await;
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}
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}
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(formatter.format_error)(err)
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}
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};
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if info.reload_timezone { unsafe { tzset(); } }
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Ok(resp)
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}
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fn get_index(
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userid: Option<Userid>,
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token: Option<String>,
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language: Option<String>,
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api: &Arc<ApiConfig>,
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parts: Parts,
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) -> Response<Body> {
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let nodename = proxmox::tools::nodename();
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let userid = userid.as_ref().map(|u| u.as_str()).unwrap_or("");
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let token = token.unwrap_or_else(|| String::from(""));
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let mut debug = false;
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let mut template_file = "index";
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if let Some(query_str) = parts.uri.query() {
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for (k, v) in form_urlencoded::parse(query_str.as_bytes()).into_owned() {
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if k == "debug" && v != "0" && v != "false" {
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debug = true;
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} else if k == "console" {
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template_file = "console";
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}
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}
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}
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let mut lang = String::from("");
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if let Some(language) = language {
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if Path::new(&format!("/usr/share/pbs-i18n/pbs-lang-{}.js", language)).exists() {
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lang = language;
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}
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}
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let data = json!({
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"NodeName": nodename,
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"UserName": userid,
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"CSRFPreventionToken": token,
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"language": lang,
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"debug": debug,
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});
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let mut ct = "text/html";
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let index = match api.render_template(template_file, &data) {
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Ok(index) => index,
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Err(err) => {
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ct = "text/plain";
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format!("Error rendering template: {}", err)
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}
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};
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Response::builder()
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.status(StatusCode::OK)
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.header(header::CONTENT_TYPE, ct)
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.body(index.into())
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.unwrap()
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}
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fn extension_to_content_type(filename: &Path) -> (&'static str, bool) {
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if let Some(ext) = filename.extension().and_then(|osstr| osstr.to_str()) {
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return match ext {
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"css" => ("text/css", false),
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"html" => ("text/html", false),
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"js" => ("application/javascript", false),
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"json" => ("application/json", false),
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"map" => ("application/json", false),
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"png" => ("image/png", true),
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"ico" => ("image/x-icon", true),
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"gif" => ("image/gif", true),
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"svg" => ("image/svg+xml", false),
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"jar" => ("application/java-archive", true),
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"woff" => ("application/font-woff", true),
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"woff2" => ("application/font-woff2", true),
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"ttf" => ("application/font-snft", true),
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"pdf" => ("application/pdf", true),
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"epub" => ("application/epub+zip", true),
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"mp3" => ("audio/mpeg", true),
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"oga" => ("audio/ogg", true),
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"tgz" => ("application/x-compressed-tar", true),
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_ => ("application/octet-stream", false),
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};
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}
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("application/octet-stream", false)
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}
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async fn simple_static_file_download(filename: PathBuf) -> Result<Response<Body>, Error> {
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let (content_type, _nocomp) = extension_to_content_type(&filename);
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use tokio::io::AsyncReadExt;
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let mut file = File::open(filename)
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.await
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.map_err(|err| http_err!(BAD_REQUEST, "File open failed: {}", err))?;
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let mut data: Vec<u8> = Vec::new();
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file.read_to_end(&mut data)
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.await
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.map_err(|err| http_err!(BAD_REQUEST, "File read failed: {}", err))?;
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let mut response = Response::new(data.into());
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response.headers_mut().insert(
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header::CONTENT_TYPE,
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header::HeaderValue::from_static(content_type));
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Ok(response)
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}
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async fn chuncked_static_file_download(filename: PathBuf) -> Result<Response<Body>, Error> {
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let (content_type, _nocomp) = extension_to_content_type(&filename);
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let file = File::open(filename)
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.await
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.map_err(|err| http_err!(BAD_REQUEST, "File open failed: {}", err))?;
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let payload = tokio_util::codec::FramedRead::new(file, tokio_util::codec::BytesCodec::new())
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.map_ok(|bytes| hyper::body::Bytes::from(bytes.freeze()));
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let body = Body::wrap_stream(payload);
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// fixme: set other headers ?
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Ok(Response::builder()
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.status(StatusCode::OK)
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.header(header::CONTENT_TYPE, content_type)
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.body(body)
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.unwrap()
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)
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}
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async fn handle_static_file_download(filename: PathBuf) -> Result<Response<Body>, Error> {
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let metadata = tokio::fs::metadata(filename.clone())
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.map_err(|err| http_err!(BAD_REQUEST, "File access problems: {}", err))
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.await?;
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if metadata.len() < 1024*32 {
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simple_static_file_download(filename).await
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} else {
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chuncked_static_file_download(filename).await
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}
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}
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fn extract_auth_data(headers: &http::HeaderMap) -> (Option<String>, Option<String>, Option<String>) {
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let mut ticket = None;
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let mut language = None;
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if let Some(raw_cookie) = headers.get("COOKIE") {
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if let Ok(cookie) = raw_cookie.to_str() {
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ticket = tools::extract_cookie(cookie, "PBSAuthCookie");
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language = tools::extract_cookie(cookie, "PBSLangCookie");
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}
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}
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let token = match headers.get("CSRFPreventionToken").map(|v| v.to_str()) {
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Some(Ok(v)) => Some(v.to_owned()),
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_ => None,
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};
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(ticket, token, language)
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}
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fn check_auth(
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method: &hyper::Method,
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ticket: &Option<String>,
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token: &Option<String>,
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user_info: &CachedUserInfo,
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) -> Result<Userid, Error> {
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let ticket_lifetime = tools::ticket::TICKET_LIFETIME;
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let ticket = ticket.as_ref().map(String::as_str);
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let userid: Userid = Ticket::parse(&ticket.ok_or_else(|| format_err!("missing ticket"))?)?
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.verify_with_time_frame(public_auth_key(), "PBS", None, -300..ticket_lifetime)?;
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if !user_info.is_active_user(&userid) {
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bail!("user account disabled or expired.");
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}
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if method != hyper::Method::GET {
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if let Some(token) = token {
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println!("CSRF prevention token: {:?}", token);
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verify_csrf_prevention_token(csrf_secret(), &userid, &token, -300, ticket_lifetime)?;
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} else {
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bail!("missing CSRF prevention token");
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}
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}
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Ok(userid)
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}
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pub async fn handle_request(api: Arc<ApiConfig>, req: Request<Body>) -> Result<Response<Body>, Error> {
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let (parts, body) = req.into_parts();
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let method = parts.method.clone();
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let (path, components) = tools::normalize_uri_path(parts.uri.path())?;
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let comp_len = components.len();
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//println!("REQUEST {} {}", method, path);
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//println!("COMPO {:?}", components);
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let env_type = api.env_type();
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let mut rpcenv = RestEnvironment::new(env_type);
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let user_info = CachedUserInfo::new()?;
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let delay_unauth_time = std::time::Instant::now() + std::time::Duration::from_millis(3000);
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let access_forbidden_time = std::time::Instant::now() + std::time::Duration::from_millis(500);
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if comp_len >= 1 && components[0] == "api2" {
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if comp_len >= 2 {
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let format = components[1];
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let formatter = match format {
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"json" => &JSON_FORMATTER,
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"extjs" => &EXTJS_FORMATTER,
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_ => bail!("Unsupported output format '{}'.", format),
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};
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let mut uri_param = HashMap::new();
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if comp_len == 4 && components[2] == "access" && (
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(components[3] == "ticket" && method == hyper::Method::POST) ||
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(components[3] == "domains" && method == hyper::Method::GET)
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) {
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// explicitly allow those calls without auth
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} else {
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let (ticket, token, _) = extract_auth_data(&parts.headers);
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match check_auth(&method, &ticket, &token, &user_info) {
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Ok(userid) => rpcenv.set_user(Some(userid.to_string())),
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Err(err) => {
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// always delay unauthorized calls by 3 seconds (from start of request)
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let err = http_err!(UNAUTHORIZED, "authentication failed - {}", err);
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tokio::time::delay_until(Instant::from_std(delay_unauth_time)).await;
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return Ok((formatter.format_error)(err));
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}
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}
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}
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match api.find_method(&components[2..], method, &mut uri_param) {
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None => {
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let err = http_err!(NOT_FOUND, "Path '{}' not found.", path);
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return Ok((formatter.format_error)(err));
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}
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Some(api_method) => {
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let user = rpcenv.get_user();
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if !check_api_permission(api_method.access.permission, user.as_deref(), &uri_param, user_info.as_ref()) {
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let err = http_err!(FORBIDDEN, "permission check failed");
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tokio::time::delay_until(Instant::from_std(access_forbidden_time)).await;
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return Ok((formatter.format_error)(err));
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}
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let result = if api_method.protected && env_type == RpcEnvironmentType::PUBLIC {
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proxy_protected_request(api_method, parts, body).await
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} else {
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handle_api_request(rpcenv, api_method, formatter, parts, body, uri_param).await
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};
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if let Err(err) = result {
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return Ok((formatter.format_error)(err));
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}
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return result;
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}
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}
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}
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} else {
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// not Auth required for accessing files!
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if method != hyper::Method::GET {
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bail!("Unsupported HTTP method {}", method);
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}
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if comp_len == 0 {
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let (ticket, token, language) = extract_auth_data(&parts.headers);
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if ticket != None {
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match check_auth(&method, &ticket, &token, &user_info) {
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Ok(userid) => {
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let new_token = assemble_csrf_prevention_token(csrf_secret(), &userid);
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return Ok(get_index(Some(userid), Some(new_token), language, &api, parts));
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}
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_ => {
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tokio::time::delay_until(Instant::from_std(delay_unauth_time)).await;
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return Ok(get_index(None, None, language, &api, parts));
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}
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}
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} else {
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return Ok(get_index(None, None, language, &api, parts));
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}
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} else {
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let filename = api.find_alias(&components);
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return handle_static_file_download(filename).await;
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}
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}
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Err(http_err!(NOT_FOUND, "Path '{}' not found.", path))
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}
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