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diff --git a/shared/comm-opaque2/.gitignore b/shared/comm-opaque2/.gitignore
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diff --git a/shared/comm-opaque2/Cargo.toml b/shared/comm-opaque2/Cargo.toml
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "comm-opaque"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib", "lib"]
+
+[dependencies]
+argon2 = "0.4"
+log = "0.4"
+opaque-ke = { version = "2.0", features = [ "argon2" ] }
+rand = "0.8"
+tonic = { version = "0.8", default-features = false }
diff --git a/shared/comm-opaque2/src/client/login.rs b/shared/comm-opaque2/src/client/login.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/client/login.rs
@@ -0,0 +1,60 @@
+use opaque_ke::{
+ errors::ProtocolError, ClientLogin, ClientLoginFinishParameters,
+ CredentialResponse,
+};
+use rand::rngs::OsRng;
+
+use crate::Cipher;
+
+pub struct Login {
+ state: Option<ClientLogin<Cipher>>,
+ password: Option<String>,
+ rng: OsRng,
+ export_key: Option<Vec<u8>>,
+ pub session_key: Option<Vec<u8>>,
+}
+
+impl Login {
+ pub fn new() -> Login {
+ Login {
+ state: None,
+ password: None,
+ rng: OsRng,
+ session_key: None,
+ export_key: None,
+ }
+ }
+
+ pub fn start(&mut self, password: &str) -> Result<Vec<u8>, ProtocolError> {
+ let client_start_result =
+ ClientLogin::<Cipher>::start(&mut self.rng, password.as_bytes())?;
+ self.state = Some(client_start_result.state);
+ self.password = Some(password.to_string());
+ Ok(client_start_result.message.serialize().to_vec())
+ }
+
+ pub fn finish(
+ &mut self,
+ response_payload: &[u8],
+ ) -> Result<Vec<u8>, ProtocolError> {
+ let response = CredentialResponse::deserialize(response_payload)?;
+ let password = self
+ .password
+ .take()
+ .ok_or_else(|| ProtocolError::InvalidLoginError)?;
+ let state = self
+ .state
+ .take()
+ .ok_or_else(|| ProtocolError::InvalidLoginError)?;
+ let result = state.finish(
+ password.as_bytes(),
+ response,
+ ClientLoginFinishParameters::default(),
+ )?;
+
+ self.session_key = Some(result.session_key.to_vec());
+ self.export_key = Some(result.export_key.to_vec());
+
+ Ok(result.message.serialize().to_vec())
+ }
+}
diff --git a/shared/comm-opaque2/src/client/mod.rs b/shared/comm-opaque2/src/client/mod.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/client/mod.rs
@@ -0,0 +1,5 @@
+pub mod login;
+pub mod register;
+
+pub use login::Login;
+pub use register::Registration;
diff --git a/shared/comm-opaque2/src/client/register.rs b/shared/comm-opaque2/src/client/register.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/client/register.rs
@@ -0,0 +1,52 @@
+use opaque_ke::{
+ errors::ProtocolError, ClientRegistration,
+ ClientRegistrationFinishParameters, RegistrationResponse,
+};
+use rand::rngs::OsRng;
+
+use crate::Cipher;
+
+pub struct Registration {
+ state: Option<ClientRegistration<Cipher>>,
+ rng: OsRng,
+ export_key: Option<Vec<u8>>,
+}
+
+impl Registration {
+ pub fn new() -> Registration {
+ Registration {
+ state: None,
+ rng: OsRng,
+ export_key: None,
+ }
+ }
+
+ pub fn start(&mut self, password: &str) -> Result<Vec<u8>, ProtocolError> {
+ let result =
+ ClientRegistration::<Cipher>::start(&mut self.rng, password.as_bytes())?;
+ self.state = Some(result.state);
+ Ok(result.message.serialize().to_vec())
+ }
+
+ pub fn finish(
+ &mut self,
+ password: &str,
+ response_payload: &[u8],
+ ) -> Result<Vec<u8>, ProtocolError> {
+ let response = RegistrationResponse::deserialize(response_payload)?;
+ let state = self
+ .state
+ .take()
+ .ok_or_else(|| ProtocolError::InvalidLoginError)?;
+ let result = state.finish(
+ &mut self.rng,
+ password.as_bytes(),
+ response,
+ ClientRegistrationFinishParameters::default(),
+ )?;
+
+ self.export_key = Some(result.export_key.to_vec());
+
+ Ok(result.message.serialize().to_vec())
+ }
+}
diff --git a/shared/comm-opaque2/src/grpc.rs b/shared/comm-opaque2/src/grpc.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/grpc.rs
@@ -0,0 +1,28 @@
+use log::info;
+use opaque_ke::errors::ProtocolError;
+use tonic::Status;
+
+pub fn protocol_error_to_grpc_status(error: ProtocolError) -> tonic::Status {
+ match error {
+ ProtocolError::IdentityGroupElementError => {
+ info!("Failed to validate password");
+ Status::aborted("server error")
+ }
+ ProtocolError::InvalidLoginError => {
+ info!("Failed to login");
+ Status::aborted("login failed")
+ }
+ ProtocolError::LibraryError(_) => {
+ info!("Opaque error");
+ Status::invalid_argument("internal error")
+ }
+ ProtocolError::ReflectedValueError => {
+ info!("OPRF value was reflected");
+ Status::invalid_argument("invalid server response")
+ }
+ ProtocolError::SerializationError => {
+ info!("Invalid argument");
+ Status::invalid_argument("invalid argument")
+ }
+ }
+}
diff --git a/shared/comm-opaque2/src/lib.rs b/shared/comm-opaque2/src/lib.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/lib.rs
@@ -0,0 +1,52 @@
+pub mod client;
+pub mod grpc;
+pub mod opaque;
+pub mod server;
+
+pub use crate::opaque::Cipher;
+
+#[test]
+pub fn test_register_and_login() {
+ use rand::rngs::OsRng;
+
+ let pass = "test";
+ let username = "alice";
+
+ let server_setup = opaque_ke::ServerSetup::<Cipher>::new(&mut OsRng);
+
+ // Register user
+ let mut client_register = client::Registration::new();
+ let client_message = client_register.start(pass).unwrap();
+
+ let mut server_register = server::Registration::new();
+ let server_response = server_register
+ .start(&server_setup, &client_message, username.as_bytes())
+ .unwrap();
+
+ let client_upload = client_register.finish(pass, &server_response).unwrap();
+
+ // These bytes are the used to validate future login sessions, normally it
+ // would saved to a database or other data store
+ let password_file_bytes = server_register.finish(&client_upload).unwrap();
+
+ // Login user
+ let mut login_client = client::Login::new();
+ let client_request = login_client.start(pass).unwrap();
+
+ let mut server_login = server::Login::new();
+ let server_response = server_login
+ .start(
+ &server_setup,
+ &password_file_bytes,
+ &client_request,
+ username.as_bytes(),
+ )
+ .unwrap();
+
+ let client_upload = login_client.finish(&server_response).unwrap();
+
+ server_login.finish(&client_upload).unwrap();
+
+ assert_eq!(login_client.session_key.is_some(), true);
+ assert_eq!(login_client.session_key, server_login.session_key);
+}
diff --git a/shared/comm-opaque2/src/opaque.rs b/shared/comm-opaque2/src/opaque.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/opaque.rs
@@ -0,0 +1,11 @@
+use argon2::Argon2;
+use opaque_ke::ciphersuite::CipherSuite;
+
+pub struct Cipher;
+
+impl CipherSuite for Cipher {
+ type OprfCs = opaque_ke::Ristretto255;
+ type KeGroup = opaque_ke::Ristretto255;
+ type KeyExchange = opaque_ke::key_exchange::tripledh::TripleDh;
+ type Ksf = Argon2<'static>;
+}
diff --git a/shared/comm-opaque2/src/server/login.rs b/shared/comm-opaque2/src/server/login.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/server/login.rs
@@ -0,0 +1,63 @@
+use opaque_ke::{errors::ProtocolError, ServerRegistration};
+use opaque_ke::{
+ CredentialFinalization, CredentialRequest, ServerLogin,
+ ServerLoginStartParameters, ServerSetup,
+};
+use rand::rngs::OsRng;
+
+use crate::Cipher;
+
+pub struct Login {
+ state: Option<ServerLogin<Cipher>>,
+ rng: OsRng,
+ pub session_key: Option<Vec<u8>>,
+}
+
+impl Login {
+ pub fn new() -> Login {
+ Login {
+ state: None,
+ rng: OsRng,
+ session_key: None,
+ }
+ }
+
+ pub fn start(
+ &mut self,
+ server_setup: &ServerSetup<Cipher>,
+ password_file_bytes: &[u8],
+ credential_request: &[u8],
+ credential_identifier: &[u8],
+ ) -> Result<Vec<u8>, ProtocolError> {
+ let password_file = ServerRegistration::deserialize(password_file_bytes)?;
+ let credential_request =
+ CredentialRequest::deserialize(credential_request)?;
+ let result = ServerLogin::start(
+ &mut self.rng,
+ server_setup,
+ Some(password_file),
+ credential_request,
+ credential_identifier,
+ ServerLoginStartParameters::default(),
+ )?;
+ self.state = Some(result.state);
+
+ Ok(result.message.serialize().to_vec())
+ }
+
+ pub fn finish(
+ &mut self,
+ response_payload: &[u8],
+ ) -> Result<(), ProtocolError> {
+ let finalization_payload =
+ CredentialFinalization::deserialize(response_payload)?;
+
+ let state = self
+ .state
+ .take()
+ .ok_or_else(|| ProtocolError::InvalidLoginError)?;
+ let result = state.finish(finalization_payload)?;
+ self.session_key = Some(result.session_key.to_vec());
+ Ok(())
+ }
+}
diff --git a/shared/comm-opaque2/src/server/mod.rs b/shared/comm-opaque2/src/server/mod.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/server/mod.rs
@@ -0,0 +1,5 @@
+pub mod login;
+pub mod register;
+
+pub use login::Login;
+pub use register::Registration;
diff --git a/shared/comm-opaque2/src/server/register.rs b/shared/comm-opaque2/src/server/register.rs
new file mode 100644
--- /dev/null
+++ b/shared/comm-opaque2/src/server/register.rs
@@ -0,0 +1,40 @@
+use opaque_ke::{errors::ProtocolError, ServerRegistration};
+use opaque_ke::{RegistrationRequest, RegistrationUpload, ServerSetup};
+
+use crate::Cipher;
+
+pub struct Registration {}
+
+impl Registration {
+ pub fn new() -> Registration {
+ Registration {}
+ }
+
+ pub fn start(
+ &self,
+ server_setup: &ServerSetup<Cipher>,
+ payload: &[u8],
+ credential_identifier: &[u8],
+ ) -> Result<Vec<u8>, ProtocolError> {
+ let upload = RegistrationRequest::deserialize(payload)?;
+ let result = ServerRegistration::<Cipher>::start(
+ server_setup,
+ upload,
+ credential_identifier,
+ )?;
+ Ok(result.message.serialize().to_vec())
+ }
+
+ pub fn finish(
+ &mut self,
+ response_payload: &[u8],
+ ) -> Result<Vec<u8>, ProtocolError> {
+ let upload_payload =
+ RegistrationUpload::<Cipher>::deserialize(response_payload)?;
+ Ok(
+ ServerRegistration::finish(upload_payload)
+ .serialize()
+ .to_vec(),
+ )
+ }
+}

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