Files
inbuxa-server/crates/http/src/auth/oauth/token.rs
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jcoffey-dev 447229f871
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Lock accounts: keep receiving mail, no sign-in, hand to delegates
A locked account can't sign in (it fails as a wrong password does), its
sessions end on every node, refresh tokens stop working, and its Sieve
scripts forward and reply to nothing. Mail keeps arriving.

Delegates get real ACL grants on the account's mailboxes, calendars,
address books and files at read, organize or full, with the rights they
replaced restored on unlock. Folders made later are granted after the
create and in a daily sweep. Organize delegates can't destroy; send-as
needs organize or full. The JMAP session marks delegated accounts in
urn:inbuxa:jmap.

New inbuxa:AccountLock object with get/set, permissions 665-668, and a
Compliance > Locked Accounts entry in the schema. Lock, unlock and
delegate changes need a reason and are audited; delegate access and
writes are audited too (audit-hold-lock spec AL-1 to AL-12).
2026-09-27 14:46:06 -07:00

454 lines
18 KiB
Rust

/*
* SPDX-FileCopyrightText: 2020 Stalwart Labs LLC <[email protected]>
*
* SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
*
* Modified by Coffey Labs in 2026 for INBUXA.
*/
use super::{
ArchivedOAuthStatus, ArchivedPkceCodeChallenge, ErrorType, FormData, MAX_POST_LEN, OAuthCode,
OAuthResponse, OAuthStatus, TokenResponse, registration::ClientRegistrationHandler,
};
use crate::auth::authenticate::HttpHeaders;
use base64::{
Engine,
engine::general_purpose::{STANDARD, URL_SAFE_NO_PAD},
};
use common::{
KV_OAUTH, Server,
auth::{
AccessToken,
oauth::{GrantType, oidc::StandardClaims},
},
};
use http_proto::*;
use hyper::StatusCode;
use sha2::{Digest, Sha256};
use std::{borrow::Cow, future::Future};
use store::{
dispatch::lookup::KeyValue,
write::{AlignedBytes, Archive},
};
use trc::AddContext;
pub trait TokenHandler: Sync + Send {
fn handle_token_request(
&self,
req: &mut HttpRequest,
session: HttpSessionData,
) -> impl Future<Output = trc::Result<HttpResponse>> + Send;
fn handle_token_introspect(
&self,
req: &mut HttpRequest,
access_token: &AccessToken,
session_id: u64,
) -> impl Future<Output = trc::Result<HttpResponse>> + Send;
#[allow(clippy::too_many_arguments)]
fn issue_token(
&self,
account_id: u32,
client_id: &str,
issuer: String,
nonce: Option<String>,
scope: Option<String>,
with_refresh_token: bool,
with_id_token: bool,
) -> impl Future<Output = trc::Result<OAuthResponse>> + Send;
}
impl TokenHandler for Server {
// Token endpoint
async fn handle_token_request(
&self,
req: &mut HttpRequest,
session: HttpSessionData,
) -> trc::Result<HttpResponse> {
// Parse form
let params = FormData::from_request(req, MAX_POST_LEN, session.session_id).await?;
let grant_type = params.get("grant_type").unwrap_or_default();
let (client_id_cred, client_secret_cred) = client_credentials(req, &params);
let mut response = TokenResponse::error(ErrorType::InvalidGrant);
let issuer = self.core.network.http.url_https.to_string();
if grant_type.eq_ignore_ascii_case("authorization_code") {
response = if let (Some(code), Some(client_id), Some(redirect_uri)) = (
params.get("code"),
client_id_cred.as_deref(),
params.get("redirect_uri"),
) {
// Obtain code
match self
.in_memory_store()
.key_get::<Archive<AlignedBytes>>(KeyValue::<()>::build_key(
KV_OAUTH,
code.as_bytes(),
))
.await?
{
Some(auth_code_) => {
let oauth = auth_code_
.unarchive::<OAuthCode>()
.caused_by(trc::location!())?;
if client_id != oauth.client_id || redirect_uri != oauth.params {
TokenResponse::error(ErrorType::InvalidClient)
} else if !verify_pkce(&oauth.code_challenge, params.get("code_verifier")) {
TokenResponse::error(ErrorType::InvalidGrant)
} else if oauth.status == OAuthStatus::Authorized {
// Validate client id
if let Some(error) = self
.validate_client_registration(
client_id,
redirect_uri.into(),
oauth.account_id.into(),
)
.await?
{
TokenResponse::error(error)
} else if let Some(error) = self
.verify_client_secret(client_id, client_secret_cred.as_deref())
.await?
{
TokenResponse::error(error)
} else {
// Mark this token as issued
self.in_memory_store()
.key_delete(KeyValue::<()>::build_key(
KV_OAUTH,
code.as_bytes(),
))
.await?;
// Issue token
self.issue_token(
oauth.account_id.into(),
&oauth.client_id,
issuer,
oauth.nonce.as_ref().map(|s| s.as_str().into()),
oauth.scope.as_ref().map(|s| s.as_str().into()),
true,
true,
)
.await
.map(TokenResponse::Granted)
.map_err(|err| {
trc::AuthEvent::Error
.into_err()
.details(err)
.caused_by(trc::location!())
})?
}
} else {
TokenResponse::error(ErrorType::InvalidGrant)
}
}
None => TokenResponse::error(ErrorType::AccessDenied),
}
} else {
TokenResponse::error(ErrorType::InvalidClient)
};
} else if grant_type.eq_ignore_ascii_case("urn:ietf:params:oauth:grant-type:device_code") {
response = TokenResponse::error(ErrorType::ExpiredToken);
if let (Some(device_code), Some(client_id)) =
(params.get("device_code"), params.get("client_id"))
{
// Obtain code
if let Some(auth_code_) = self
.in_memory_store()
.key_get::<Archive<AlignedBytes>>(KeyValue::<()>::build_key(
KV_OAUTH,
device_code.as_bytes(),
))
.await?
{
let oauth = auth_code_
.unarchive::<OAuthCode>()
.caused_by(trc::location!())?;
response = if oauth.client_id != client_id {
TokenResponse::error(ErrorType::InvalidClient)
} else {
match oauth.status {
ArchivedOAuthStatus::Authorized => {
if let Some(error) = self
.validate_client_registration(
client_id,
None,
oauth.account_id.into(),
)
.await?
{
TokenResponse::error(error)
} else {
// Mark this token as issued
self.in_memory_store()
.key_delete(KeyValue::<()>::build_key(
KV_OAUTH,
device_code.as_bytes(),
))
.await?;
// Issue token
self.issue_token(
oauth.account_id.into(),
&oauth.client_id,
issuer,
oauth.nonce.as_ref().map(|s| s.as_str().into()),
oauth.scope.as_ref().map(|s| s.as_str().into()),
true,
true,
)
.await
.map(TokenResponse::Granted)
.map_err(|err| {
trc::AuthEvent::Error
.into_err()
.details(err)
.caused_by(trc::location!())
})?
}
}
ArchivedOAuthStatus::Pending => {
TokenResponse::error(ErrorType::AuthorizationPending)
}
ArchivedOAuthStatus::TokenIssued => {
TokenResponse::error(ErrorType::ExpiredToken)
}
}
};
}
}
} else if grant_type.eq_ignore_ascii_case("refresh_token") {
if let Some(refresh_token) = params.get("refresh_token") {
if let Some(client_id) = client_id_cred.as_deref()
&& let Some(error) = self
.verify_client_secret(client_id, client_secret_cred.as_deref())
.await?
{
return Ok(JsonResponse::with_status(
StatusCode::BAD_REQUEST,
TokenResponse::error(error),
)
.into_http_response());
}
response = match self
.validate_access_token(GrantType::RefreshToken.into(), refresh_token)
.await
{
// inbuxa: AL-2: a locked account gets no new tokens
Ok(token_info)
if self
.access_token(token_info.account_id)
.await
.is_ok_and(|token| token.is_locked()) =>
{
TokenResponse::error(ErrorType::InvalidGrant)
}
Ok(token_info) => self
.issue_token(
token_info.account_id,
// inbuxa: AU-5: the client travels in the refresh token
token_info.claims.as_deref().unwrap_or_default(),
issuer,
None,
None,
token_info.expires_in
<= self.core.oauth.oauth_expiry_refresh_token_renew,
false,
)
.await
.map(TokenResponse::Granted)
.map_err(|err| {
trc::AuthEvent::Error
.into_err()
.details(err)
.caused_by(trc::location!())
})?,
Err(err) => {
trc::error!(
err.caused_by(trc::location!())
.details("Failed to validate refresh token")
.span_id(session.session_id)
);
TokenResponse::error(ErrorType::InvalidGrant)
}
};
} else {
response = TokenResponse::error(ErrorType::InvalidRequest);
}
}
Ok(JsonResponse::with_status(
if response.is_error() {
StatusCode::BAD_REQUEST
} else {
StatusCode::OK
},
response,
)
.into_http_response())
}
async fn handle_token_introspect(
&self,
req: &mut HttpRequest,
access_token: &AccessToken,
session_id: u64,
) -> trc::Result<HttpResponse> {
// Parse token
let token = FormData::from_request(req, 1024, session_id)
.await?
.remove("token")
.ok_or_else(|| {
trc::ResourceEvent::BadParameters
.into_err()
.details("Client ID is missing.")
})?;
self.introspect_access_token(&token, access_token)
.await
.map(|response| JsonResponse::new(response).no_cache().into_http_response())
}
async fn issue_token(
&self,
account_id: u32,
client_id: &str,
issuer: String,
nonce: Option<String>,
scope: Option<String>,
with_refresh_token: bool,
with_id_token: bool,
) -> trc::Result<OAuthResponse> {
let credential_version = self
.access_token(account_id)
.await
.caused_by(trc::location!())?
.credential_version();
let account = self.account(account_id).await.caused_by(trc::location!())?;
let account_name = account.name();
Ok(OAuthResponse {
access_token: self
.encode_access_token(
GrantType::AccessToken,
account_id,
account_name,
self.core.oauth.oauth_expiry_token,
// inbuxa: AU-5: the token names the client it was issued to
Some(client_id),
credential_version.into(),
)
.await?,
token_type: "bearer".to_string(),
expires_in: self.core.oauth.oauth_expiry_token,
refresh_token: if with_refresh_token {
self.encode_access_token(
GrantType::RefreshToken,
account_id,
account_name,
self.core.oauth.oauth_expiry_refresh_token,
// inbuxa: AU-5: so a refreshed access token still names it
Some(client_id),
credential_version.into(),
)
.await?
.into()
} else {
None
},
id_token: if with_id_token {
match self.issue_id_token(
account_id.to_string(),
issuer,
client_id,
StandardClaims {
nonce,
preferred_username: account.name().to_string().into(),
email: account.name().to_string().into(),
description: account.description().map(|d| d.to_string()),
},
) {
Ok(id_token) => Some(id_token),
Err(err) => {
trc::error!(err);
None
}
}
} else {
None
},
scope,
})
}
}
fn client_credentials<'x>(
req: &'x HttpRequest,
params: &'x FormData,
) -> (Option<Cow<'x, str>>, Option<Cow<'x, str>>) {
let mut client_id = params.get("client_id").map(Cow::Borrowed);
let mut client_secret = params.get("client_secret").map(Cow::Borrowed);
if (client_id.is_none() || client_secret.is_none())
&& let Some((id, secret)) = req
.authorization_basic()
.and_then(|token| STANDARD.decode(token).ok())
.and_then(|bytes| String::from_utf8(bytes).ok())
.and_then(|creds| {
creds
.split_once(':')
.map(|(id, secret)| (id.to_string(), secret.to_string()))
})
{
if client_id.is_none() {
client_id = Some(Cow::Owned(id));
}
if client_secret.is_none() {
client_secret = Some(Cow::Owned(secret));
}
}
(client_id, client_secret)
}
fn verify_pkce(stored: &ArchivedPkceCodeChallenge, verifier: Option<&str>) -> bool {
let is_valid_pkce_challenge = |challenge: &str| {
(43..=128).contains(&challenge.len())
&& challenge
.bytes()
.all(|b| b.is_ascii_alphanumeric() || matches!(b, b'-' | b'.' | b'_' | b'~'))
};
let constant_time_eq = |a: &[u8], b: &[u8]| {
if a.len() != b.len() {
return false;
}
let mut diff: u8 = 0;
for (x, y) in a.iter().zip(b.iter()) {
diff |= x ^ y;
}
diff == 0
};
match (stored, verifier) {
(ArchivedPkceCodeChallenge::None, None) => true,
(ArchivedPkceCodeChallenge::Plain(expected), Some(verifier))
if is_valid_pkce_challenge(verifier) =>
{
constant_time_eq(expected.as_bytes(), verifier.as_bytes())
}
(ArchivedPkceCodeChallenge::S256(expected), Some(verifier))
if is_valid_pkce_challenge(verifier) =>
{
let digest = Sha256::digest(verifier.as_bytes());
let computed = URL_SAFE_NO_PAD.encode(digest);
constant_time_eq(expected.as_bytes(), computed.as_bytes())
}
_ => false,
}
}