diff --git a/services/identity/src/database.rs b/services/identity/src/database.rs --- a/services/identity/src/database.rs +++ b/services/identity/src/database.rs @@ -1,7 +1,14 @@ use std::collections::HashMap; -use rusoto_core::Region; -use rusoto_dynamodb::{AttributeValue, DynamoDbClient}; +use opaque_ke::{errors::ProtocolError, ServerRegistration}; +use rusoto_core::{Region, RusotoError}; +use rusoto_dynamodb::{ + AttributeValue, DynamoDb, DynamoDbClient, GetItemError, GetItemInput, + GetItemOutput, +}; +use tracing::{error, info}; + +use crate::opaque::Cipher; pub struct DatabaseClient { client: DynamoDbClient, @@ -13,6 +20,76 @@ client: DynamoDbClient::new(region), } } + + pub async fn get_pake_registration( + &self, + user_id: String, + ) -> Result>, Error> { + let primary_key = construct_primary_key_from_strings( + ("userID".to_string(), user_id.clone()), + None, + ); + let get_item_input = GetItemInput { + table_name: "identity-pake-registration".to_string(), + key: primary_key, + consistent_read: Some(true), + ..GetItemInput::default() + }; + let get_item_result = self.client.get_item(get_item_input).await; + match get_item_result { + Ok(GetItemOutput { + item: Some(item), .. + }) => { + if let Some(AttributeValue { + b: Some(server_registration_bytes), + .. + }) = item.get("pakeRegistrationData") + { + match ServerRegistration::::deserialize( + server_registration_bytes, + ) { + Ok(server_registration) => Ok(Some(server_registration)), + Err(e) => { + error!( + "Failed to deserialize ServerRegistration struct for user {}: {}", + user_id, e + ); + Err(Error::Pake(e)) + } + } + } else { + error!("No registration data found for registered user {}", user_id); + Err(Error::MissingAttribute) + } + } + Ok(_) => { + info!( + "No item found for user {} in PAKE registration table", + user_id + ); + Ok(None) + } + Err(e) => { + error!( + "DynamoDB client failed to get registration data for user {}: {}", + user_id, e + ); + Err(Error::Rusoto(e)) + } + } + } +} + +#[derive( + Debug, derive_more::Display, derive_more::From, derive_more::Error, +)] +pub enum Error { + #[display(...)] + Rusoto(RusotoError), + #[display(...)] + Pake(ProtocolError), + #[display(...)] + MissingAttribute, } type AttributeName = String;