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diff --git a/services/identity/src/service.rs b/services/identity/src/service.rs
--- a/services/identity/src/service.rs
+++ b/services/identity/src/service.rs
@@ -1,8 +1,10 @@
use chrono::Utc;
use constant_time_eq::constant_time_eq;
use futures_core::Stream;
+use opaque_ke::ServerRegistration;
use opaque_ke::{
- CredentialFinalization, CredentialRequest, ServerLogin,
+ CredentialFinalization, CredentialRequest,
+ RegistrationRequest as PakeRegistrationRequest, ServerLogin,
ServerLoginStartParameters,
};
use rand::rngs::OsRng;
@@ -31,7 +33,11 @@
pake_login_request::Data::PakeCredentialFinalization,
pake_login_request::Data::PakeCredentialRequestAndUserId,
pake_login_response::Data::AccessToken,
- pake_login_response::Data::PakeCredentialResponse, LoginRequest,
+ pake_login_response::Data::PakeCredentialResponse,
+ registration_request::Data::PakeCredentialFinalization as PakeRegistrationCredentialFinalization,
+ registration_request::Data::PakeRegistrationRequestAndUserId,
+ registration_request::Data::PakeRegistrationUploadAndCredentialRequest,
+ registration_response::Data::PakeRegistrationResponse, LoginRequest,
LoginResponse,
PakeCredentialRequestAndUserId as PakeCredentialRequestAndUserIdStruct,
PakeLoginRequest as PakeLoginRequestStruct,
@@ -65,12 +71,77 @@
>,
>;
+ #[instrument(skip(self))]
async fn register_user(
&self,
request: Request<tonic::Streaming<RegistrationRequest>>,
) -> Result<Response<Self::RegisterUserStream>, Status> {
- println!("Got a registration request: {:?}", request);
- unimplemented!()
+ let mut in_stream = request.into_inner();
+ let (tx, rx) = mpsc::channel(1);
+ let config = self.config.clone();
+ let client = self.client.clone();
+ tokio::spawn(async move {
+ let mut user_id: String = String::new();
+ let mut device_id: String = String::new();
+ let mut server_registration: Option<ServerRegistration<Cipher>> = None;
+ let mut server_login: Option<ServerLogin<Cipher>> = None;
+ let mut num_messages_received = 0;
+ while let Some(message) = in_stream.next().await {
+ match message {
+ Ok(RegistrationRequest {
+ data:
+ Some(PakeRegistrationRequestAndUserId(
+ pake_registration_request_and_user_id,
+ )),
+ }) => {
+ if let Err(e) = tx
+ .send(
+ pake_registration_start(
+ config.clone(),
+ &mut OsRng,
+ &pake_registration_request_and_user_id
+ .pake_registration_request,
+ num_messages_received,
+ )
+ .await
+ .map(
+ |registration_response_and_server_registration| {
+ server_registration =
+ Some(registration_response_and_server_registration.1);
+ registration_response_and_server_registration.0
+ },
+ ),
+ )
+ .await
+ {
+ error!("Response was dropped: {}", e);
+ break;
+ }
+ user_id = pake_registration_request_and_user_id.user_id;
+ device_id = pake_registration_request_and_user_id.device_id;
+ }
+ Ok(RegistrationRequest {
+ data:
+ Some(PakeRegistrationUploadAndCredentialRequest(
+ pake_registration_upload_and_credential_request,
+ )),
+ }) => unimplemented!(),
+ Ok(RegistrationRequest {
+ data:
+ Some(PakeRegistrationCredentialFinalization(
+ pake_credential_finalization,
+ )),
+ }) => unimplemented!(),
+
+ unexpected => unimplemented!(),
+ }
+ num_messages_received += 1;
+ }
+ });
+ let out_stream = ReceiverStream::new(rx);
+ Ok(Response::new(
+ Box::pin(out_stream) as Self::RegisterUserStream
+ ))
}
type LoginUserStream =
@@ -472,3 +543,36 @@
}
}
}
+
+async fn pake_registration_start(
+ config: Config,
+ rng: &mut (impl Rng + CryptoRng),
+ registration_request_bytes: &[u8],
+ num_messages_received: u8,
+) -> Result<(RegistrationResponse, ServerRegistration<Cipher>), Status> {
+ if num_messages_received != 0 {
+ error!("Too many messages received in stream, aborting");
+ return Err(Status::aborted("please retry"));
+ }
+ match ServerRegistration::<Cipher>::start(
+ rng,
+ PakeRegistrationRequest::deserialize(registration_request_bytes).unwrap(),
+ config.server_keypair.public(),
+ ) {
+ Ok(server_registration_start_result) => Ok((
+ RegistrationResponse {
+ data: Some(PakeRegistrationResponse(
+ server_registration_start_result.message.serialize(),
+ )),
+ },
+ server_registration_start_result.state,
+ )),
+ Err(e) => {
+ error!(
+ "Encountered a PAKE protocol error when starting registration: {}",
+ e
+ );
+ Err(Status::aborted("server error"))
+ }
+ }
+}

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