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|
use std::fmt;
use axum::{
extract::{FromRequestParts, State},
http::request::Parts,
response::{IntoResponse, IntoResponseParts, Response, ResponseParts},
};
use axum_extra::extract::cookie::{Cookie, CookieJar};
use crate::{
app::App,
clock::RequestedAt,
error::{Internal, Unauthorized},
login::app::ValidateError,
repo::{login::Login, token},
};
// The usage pattern here - receive the extractor as an argument, return it in
// the response - is heavily modelled after CookieJar's own intended usage.
#[derive(Clone)]
pub struct IdentityToken {
cookies: CookieJar,
}
impl fmt::Debug for IdentityToken {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_struct("IdentityToken")
.field(
"identity",
&self.cookies.get(IDENTITY_COOKIE).map(|_| "********"),
)
.finish()
}
}
impl IdentityToken {
// Creates a new, unpopulated identity token store.
#[cfg(test)]
pub fn new() -> Self {
Self {
cookies: CookieJar::new(),
}
}
// Get the identity secret sent in the request, if any. If the identity
// was not sent, or if it has previously been [clear]ed, then this will
// return [None]. If the identity has previously been [set], then this
// will return that secret, regardless of what the request originally
// included.
pub fn secret(&self) -> Option<IdentitySecret> {
self.cookies
.get(IDENTITY_COOKIE)
.map(Cookie::value)
.map(IdentitySecret::from)
}
// Positively set the identity secret, and ensure that it will be sent
// back to the client when this extractor is included in a response.
pub fn set(self, secret: impl Into<IdentitySecret>) -> Self {
let IdentitySecret(secret) = secret.into();
let identity_cookie = Cookie::build((IDENTITY_COOKIE, secret))
.http_only(true)
.path("/api/")
.permanent()
.build();
Self {
cookies: self.cookies.add(identity_cookie),
}
}
// Remove the identity secret and ensure that it will be cleared when this
// extractor is included in a response.
pub fn clear(self) -> Self {
Self {
cookies: self.cookies.remove(IDENTITY_COOKIE),
}
}
}
const IDENTITY_COOKIE: &str = "identity";
#[async_trait::async_trait]
impl<S> FromRequestParts<S> for IdentityToken
where
S: Send + Sync,
{
type Rejection = <CookieJar as FromRequestParts<S>>::Rejection;
async fn from_request_parts(parts: &mut Parts, state: &S) -> Result<Self, Self::Rejection> {
let cookies = CookieJar::from_request_parts(parts, state).await?;
Ok(Self { cookies })
}
}
impl IntoResponseParts for IdentityToken {
type Error = <CookieJar as IntoResponseParts>::Error;
fn into_response_parts(self, res: ResponseParts) -> Result<ResponseParts, Self::Error> {
let Self { cookies } = self;
cookies.into_response_parts(res)
}
}
#[derive(sqlx::Type)]
#[sqlx(transparent)]
pub struct IdentitySecret(String);
impl fmt::Debug for IdentitySecret {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
f.debug_tuple("IdentityToken").field(&"********").finish()
}
}
impl<S> From<S> for IdentitySecret
where
S: Into<String>,
{
fn from(value: S) -> Self {
Self(value.into())
}
}
#[derive(Clone, Debug)]
pub struct Identity {
pub token: token::Id,
pub login: Login,
}
#[async_trait::async_trait]
impl FromRequestParts<App> for Identity {
type Rejection = LoginError<Internal>;
async fn from_request_parts(parts: &mut Parts, state: &App) -> Result<Self, Self::Rejection> {
// After Rust 1.82 (and #[feature(min_exhaustive_patterns)] lands on
// stable), the following can be replaced:
//
// ```
// let Ok(identity_token) = IdentityToken::from_request_parts(
// parts,
// state,
// ).await;
// ```
let identity_token = IdentityToken::from_request_parts(parts, state).await?;
let RequestedAt(used_at) = RequestedAt::from_request_parts(parts, state).await?;
let secret = identity_token.secret().ok_or(LoginError::Unauthorized)?;
let app = State::<App>::from_request_parts(parts, state).await?;
match app.logins().validate(&secret, &used_at).await {
Ok((token, login)) => Ok(Identity { token, login }),
Err(ValidateError::InvalidToken) => Err(LoginError::Unauthorized),
Err(other) => Err(other.into()),
}
}
}
pub enum LoginError<E> {
Failure(E),
Unauthorized,
}
impl<E> IntoResponse for LoginError<E>
where
E: IntoResponse,
{
fn into_response(self) -> Response {
match self {
Self::Unauthorized => Unauthorized.into_response(),
Self::Failure(e) => e.into_response(),
}
}
}
impl<E> From<E> for LoginError<Internal>
where
E: Into<Internal>,
{
fn from(err: E) -> Self {
Self::Failure(err.into())
}
}
|
