continuwuity/src/api/client/oidc/token.rs
lafleur 5ab7b61129
impl MSC2964: OIDC token flow
# Conflicts:
#	Cargo.lock
2025-07-02 02:01:40 +01:00

78 lines
2.3 KiB
Rust

/// Implementation of [MSC2964]'s OAuth2 restricted flow using the [oxide-auth]
/// crate. See the MSC for restrictions that apply to this flow.
///
/// [MSC2965]: https://github.com/matrix-org/matrix-spec-proposals/pull/2965
/// [oxide-auth]: https://docs.rs/oxide-auth
use oxide_auth_axum::{OAuthResponse, OAuthRequest};
use oxide_auth::endpoint::QueryParameter;
use axum::{
extract::State,
response::IntoResponse,
};
use conduwuit::{Result, err};
/// # `POST /_matrix/client/unstable/org.matrix.msc2964/token`
///
/// Depending on `grant_type`, either deliver a new token to a device, and store
/// it in the server's ring, or refresh the token.
pub(crate) async fn token(
State(services): State<crate::State>,
oauth: OAuthRequest,
) -> Result<OAuthResponse> {
let Some(body) = oauth.body() else {
return Err(err!(Request(Unknown("OAuth request had an empty body"))));
};
let grant_type = body
.unique_value("grant_type")
.map(|value| value.to_string());
let endpoint = services.oidc.endpoint();
match grant_type.as_deref() {
| Some("authorization_code") =>
endpoint
.access_token_flow()
.execute(oauth)
.map_err(|err| err!(Request(Unknown("token grant failed: {err:?}")))),
| Some("refresh_token") =>
endpoint
.refresh_flow()
.execute(oauth)
.map_err(|err| err!(Request(Unknown("token refresh failed: {err:?}")))),
| other =>
Err(err!(Request(Unknown("unsupported grant type: {other:?}")))),
}
}
/// Sample protected content. TODO check that resources are available with the returned token.
pub(crate) async fn _protected_resource(
State(services): State<crate::State>,
oauth: OAuthRequest,
) -> impl IntoResponse {
const DENY_TEXT: &str = "<html>
This page should be accessed via an oauth token from the client in the example. Click
<a href=\"/authorize?response_type=code&client_id=LocalClient\">
here</a> to begin the authorization process.
</html>
";
let protect = services
.oidc
.endpoint()
.with_scopes(vec!["default-scope".parse().unwrap()])
.resource_flow()
.execute(oauth);
match protect {
Ok(_grant) => Ok("Hello, world"),
Err(Ok(response)) => {
let error: OAuthResponse = response
//.header(ContentType::HTML)
.body(DENY_TEXT)
//.finalize()
.into();
Err(Ok(error))
}
Err(Err(err)) => Err(Err(err!(Request(Unknown("auth failed: {err:?}"))))),
}
}