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use std::sync::Arc;
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use anyhow::Error;
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use aes_gcm::{aead::Aead, AeadCore, Aes256Gcm, Key, KeyInit};
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use argon2::{password_hash::SaltString, Argon2, PasswordHasher};
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use base64::{engine::general_purpose::STANDARD, Engine as _};
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use rsa::{
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pkcs8::{EncodePrivateKey, EncodePublicKey},
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rand_core::OsRng,
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RsaPrivateKey, RsaPublicKey,
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};
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use sqlx::PgPool;
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use tokio::sync::Mutex;
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use crate::{
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authentication::AuthenticationTokenGranter,
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messages::{
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authentication::{
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AuthenticationTokenRequest, AuthenticationTokenResponse, RegisterAccountRequest,
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RegisterAccountResponse,
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},
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user::{
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UserBioRequest, UserBioResponse, UserDisplayImageRequest, UserDisplayImageResponse,
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UserDisplayNameRequest, UserDisplayNameResponse,
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},
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},
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model::{instance::Instance, user::User},
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};
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use super::{AuthBackend, UserBackend};
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pub struct UserAuth {
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pub pg_pool: PgPool,
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pub this_instance: Instance,
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pub auth_granter: Arc<Mutex<AuthenticationTokenGranter>>,
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}
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impl UserAuth {
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pub fn new(
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pool: PgPool,
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this_instance: &Instance,
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granter: Arc<Mutex<AuthenticationTokenGranter>>,
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) -> Self {
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Self {
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pg_pool: pool,
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this_instance: this_instance.clone(),
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auth_granter: granter,
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}
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}
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}
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#[async_trait::async_trait]
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impl UserBackend for UserAuth {
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async fn display_name(
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&mut self,
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request: UserDisplayNameRequest,
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) -> Result<UserDisplayNameResponse, Error> {
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let db_row = sqlx::query_as!(
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UserRow,
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r#"SELECT * FROM users WHERE username = $1"#,
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request.user.username
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)
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.fetch_one(&self.pg_pool.clone())
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.await
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.unwrap();
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Ok(UserDisplayNameResponse {
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display_name: db_row.display_name,
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})
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}
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async fn display_image(
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&mut self,
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request: UserDisplayImageRequest,
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) -> Result<UserDisplayImageResponse, anyhow::Error> {
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let db_row = sqlx::query_as!(
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UserRow,
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r#"SELECT * FROM users WHERE username = $1"#,
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request.user.username
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)
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.fetch_one(&self.pg_pool.clone())
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.await
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.unwrap();
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Ok(UserDisplayImageResponse {
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image_url: db_row.image_url,
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})
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}
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async fn bio(&mut self, request: UserBioRequest) -> Result<UserBioResponse, Error> {
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let db_row = sqlx::query_as!(
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UserRow,
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r#"SELECT * FROM users WHERE username = $1"#,
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request.user.username
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)
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.fetch_one(&self.pg_pool.clone())
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.await
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.unwrap();
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Ok(UserBioResponse { bio: db_row.bio })
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}
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async fn exists(&mut self, user: &User) -> Result<bool, Error> {
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Ok(sqlx::query_as!(
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UserRow,
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r#"SELECT * FROM users WHERE username = $1"#,
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user.username
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)
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.fetch_one(&self.pg_pool.clone())
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.await
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.is_err())
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}
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}
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#[async_trait::async_trait]
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impl AuthBackend for UserAuth {
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async fn register(
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&mut self,
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request: RegisterAccountRequest,
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) -> Result<RegisterAccountResponse, Error> {
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const BITS: usize = 2048;
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let private_key = RsaPrivateKey::new(&mut OsRng, BITS).unwrap();
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let public_key = RsaPublicKey::from(&private_key);
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let key = {
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let mut target: [u8; 32] = [0; 32];
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let mut index = 0;
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let mut iterator = request.password.as_bytes().iter();
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while index < 32 {
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if let Some(next) = iterator.next() {
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target[index] = *next;
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index += 1;
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} else {
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iterator = request.password.as_bytes().iter();
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}
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}
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target
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};
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let key: &Key<Aes256Gcm> = &key.into();
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let cipher = Aes256Gcm::new(key);
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let nonce = Aes256Gcm::generate_nonce(&mut OsRng);
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let ciphertext = cipher
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.encrypt(&nonce, private_key.to_pkcs8_der().unwrap().as_bytes())
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.unwrap();
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let private_key_enc = format!("{}#{}", STANDARD.encode(nonce), STANDARD.encode(ciphertext));
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let salt = SaltString::generate(&mut OsRng);
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let argon2 = Argon2::default();
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let password_hash = argon2
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.hash_password(request.password.as_bytes(), &salt)
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.unwrap()
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.to_string();
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let user = match sqlx::query_as!(
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UserRow,
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r#"INSERT INTO users VALUES ($1, null, $2, null, null, $3, $4, $5) returning *"#,
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request.username,
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"example.com",
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password_hash,
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public_key
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.to_public_key_pem(rsa::pkcs8::LineEnding::LF)
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.unwrap(),
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private_key_enc
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)
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.fetch_one(&self.pg_pool)
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.await
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{
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Ok(user) => user,
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Err(err) => {
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error!("Failed inserting into the database! {:?}", err);
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return Err(err.into());
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}
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};
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let mut granter = self.auth_granter.lock().await;
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let token = granter
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.create_token_for(
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&User {
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username: user.username,
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instance: self.this_instance.clone(),
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},
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&self.this_instance,
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)
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.await;
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Ok(RegisterAccountResponse { token })
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}
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async fn login(
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&mut self,
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_request: AuthenticationTokenRequest,
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) -> Result<AuthenticationTokenResponse, Error> {
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todo!()
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}
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}
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#[derive(Debug, sqlx::FromRow)]
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struct UserRow {
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pub username: String,
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pub image_url: Option<String>,
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pub display_name: Option<String>,
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pub bio: Option<String>,
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pub email: Option<String>,
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pub password: String,
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pub public_key: String,
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pub enc_private_key: Vec<u8>,
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}
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|