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use crate::{
config::DynNode,
error::ServiceError,
modules::{Node, NodeContext, NodeKind, NodeRequest, NodeResponse},
};
use base64::Engine;
use bytes::Buf;
use futures::Future;
use http::{
header::{CONTENT_TYPE, HOST},
uri::{Authority, Parts, PathAndQuery, Scheme},
HeaderValue, Method, Request, Uri,
};
use http_body_util::{combinators::BoxBody, BodyExt};
use hyper::{Response, StatusCode};
use hyper_util::rt::TokioIo;
use log::info;
use percent_encoding::{percent_decode, utf8_percent_encode, NON_ALPHANUMERIC};
use serde::Deserialize;
use serde_yaml::Value;
use sha2::{Digest, Sha256};
use std::{io::Read, pin::Pin, str::FromStr, sync::Arc};
use tokio::net::TcpStream;
pub struct OpenIDAuthKind;
impl NodeKind for OpenIDAuthKind {
fn name(&self) -> &'static str {
"openid_auth"
}
fn instanciate(&self, config: Value) -> anyhow::Result<Arc<dyn Node>> {
Ok(Arc::new(serde_yaml::from_value::<OpenIDAuth>(config)?))
}
}
#[derive(Deserialize)]
pub struct OpenIDAuth {
client_id: String,
provider: String,
next: DynNode,
}
impl Node for OpenIDAuth {
fn handle<'a>(
&'a self,
context: &'a mut NodeContext,
request: NodeRequest,
) -> Pin<Box<dyn Future<Output = Result<NodeResponse, ServiceError>> + Send + Sync + 'a>> {
Box::pin(async move {
if request.method() == Method::GET && request.uri().path() == "/_gnix_auth_callback" {
let mut state = None;
let mut code = None;
for entry in request.uri().query().unwrap_or_default().split("&") {
let (key, value) = entry.split_once("=").unwrap_or((entry, ""));
match key {
"state" => {
state = Some(
percent_decode(value.as_bytes())
.decode_utf8_lossy()
.to_string(),
)
}
"code" => code = Some(value.to_owned()),
_ => (),
}
}
let state = state.ok_or(ServiceError::CustomStatic("state parameter missing"))?;
let code = code.ok_or(ServiceError::CustomStatic("code parameter missing"))?;
let mut redirect_uri = Parts::default();
redirect_uri.scheme = Some(Scheme::HTTP);
redirect_uri.path_and_query = Some(PathAndQuery::from_str(&state).unwrap());
redirect_uri.authority = Authority::from_str(
request
.headers()
.get(HOST)
.ok_or(ServiceError::InvalidHeader)?
.to_str()?,
)
.ok();
let redirect_uri = Uri::from_parts(redirect_uri)
.map_err(|_| ServiceError::InvalidUri)?
.to_string();
token_request(&self.provider, &self.client_id, &redirect_uri, &code).await?;
let mut r = Response::new(BoxBody::<_, ServiceError>::new(
format!("state={state:?}\ncode={code:?}").map_err(|_| unreachable!()),
));
r.headers_mut()
.insert(CONTENT_TYPE, HeaderValue::from_static("text/plain"));
return Ok(r);
} else {
let mut redirect_uri = Parts::default();
redirect_uri.scheme = Some(Scheme::HTTP);
redirect_uri.path_and_query =
Some(PathAndQuery::from_static("/_gnix_auth_callback"));
redirect_uri.authority = Authority::from_str(
request
.headers()
.get(HOST)
.ok_or(ServiceError::InvalidHeader)?
.to_str()?,
)
.ok();
let redirect_uri = Uri::from_parts(redirect_uri)
.map_err(|_| ServiceError::InvalidUri)?
.to_string();
let chal: Vec<u8> = {
let mut hasher = Sha256::new();
hasher.update(r"testvalue");
hasher.finalize().to_vec()
};
let uri = format!(
"{}/authorize?client_id={}&redirect_uri={}&state={}&code_challenge={}&code_challenge_method=S256&response_type=code&scope=openid profile email",
self.provider,
utf8_percent_encode(&self.client_id, NON_ALPHANUMERIC),
utf8_percent_encode(&redirect_uri, NON_ALPHANUMERIC),
utf8_percent_encode(&request.uri().to_string(), NON_ALPHANUMERIC),
base64::engine::general_purpose::URL_SAFE.encode(chal),
);
info!("redirect {uri:?}");
let mut resp =
Response::new("".to_string()).map(|b| b.map_err(|e| match e {}).boxed());
*resp.status_mut() = StatusCode::TEMPORARY_REDIRECT;
resp.headers_mut().insert(
"Location",
HeaderValue::from_str(&uri).map_err(|_| ServiceError::InvalidHeader)?,
);
Ok(resp)
}
})
}
}
async fn token_request(
provider: &str,
client_id: &str,
redirect_uri: &str,
code: &str,
) -> Result<(), ServiceError> {
let url = Uri::from_str(&format!("{provider}/token")).unwrap();
let body = format!(
"client_id={}&redirect_uri={}&code={}&code_verifier={}&grant_type=authorization_code",
utf8_percent_encode(client_id, NON_ALPHANUMERIC),
utf8_percent_encode(redirect_uri, NON_ALPHANUMERIC),
utf8_percent_encode(code, NON_ALPHANUMERIC),
"testvalue"
);
let authority = url.authority().unwrap().clone();
let stream = TcpStream::connect(authority.as_str()).await.unwrap();
let io = TokioIo::new(stream);
let (mut sender, conn) = hyper::client::conn::http1::handshake(io).await.unwrap();
tokio::task::spawn(async move {
if let Err(err) = conn.await {
println!("Connection failed: {:?}", err);
}
});
let req = Request::builder()
.method(Method::POST)
.uri(url)
.header(HOST, authority.as_str())
.header(CONTENT_TYPE, "application/x-www-form-urlencoded")
.body(body)
.unwrap();
let res = sender.send_request(req).await.unwrap();
let body = res.collect().await.unwrap().aggregate();
let mut buf = String::new();
body.reader().read_to_string(&mut buf).unwrap();
eprintln!("{buf:?}");
Ok(())
}
|
