SSO using OpenID Connect (#3899)

* Add SSO functionality using OpenID Connect

Co-authored-by: Pablo Ovelleiro Corral <mail@pablo.tools>
Co-authored-by: Stuart Heap <sheap13@gmail.com>
Co-authored-by: Alex Moore <skiepp@my-dockerfarm.cloud>
Co-authored-by: Brian Munro <brian.alexander.munro@gmail.com>
Co-authored-by: Jacques B. <timshel@github.com>

* Improvements and error handling

* Stop rolling device token

* Add playwright tests

* Activate PKCE by default

* Ensure result order when searching for sso_user

* add SSO_ALLOW_UNKNOWN_EMAIL_VERIFICATION

* Toggle SSO button in scss

* Base64 encode state before sending it to providers

* Prevent disabled User from SSO login

* Review fixes

* Remove unused UserOrganization.invited_by_email

* Split SsoUser::find_by_identifier_or_email

* api::Accounts::verify_password add the policy even if it's ignored

* Disable signups if SSO_ONLY is activated

* Add verifiedDate to organizations::get_org_domain_sso_details

* Review fixes

* Remove OrganizationId guard from get_master_password_policy

* Add wrapper type OIDCCode OIDCState OIDCIdentifier

* Membership::confirm_user_invitations fix and tests

* Allow set-password only if account is unitialized

* Review fixes

* Prevent accepting another user invitation

* Log password change event on SSO account creation

* Unify master password policy resolution

* Upgrade openidconnect to 4.0.0

* Revert "Remove unused UserOrganization.invited_by_email"

This reverts commit 548e19995e141314af98a10d170ea7371f02fab4.

* Process org enrollment in accounts::post_set_password

* Improve tests

* Pass the claim invited_by_email in case it was not in db

* Add Slack configuration hints

* Fix playwright tests

* Skip broken tests

* Add sso identifier in admin user panel

* Remove duplicate expiration check, add a log

* Augment mobile refresh_token validity

* Rauthy configuration hints

* Fix playwright tests

* Playwright upgrade and conf improvement

* Playwright tests improvements

* 2FA email and device creation change

* Fix and improve Playwright tests

* Minor improvements

* Fix enforceOnLogin org policies

* Run playwright sso tests against correct db

* PKCE should now work with Zitadel

* Playwright upgrade maildev to use MailBuffer.expect

* Upgrades playwright tests deps

* Check email_verified in id_token and user_info

* Add sso verified endpoint for v2025.6.0

* Fix playwright tests

* Create a separate sso_client

* Upgrade openidconnect to 4.0.1

* Server settings for login fields toggle

* Use only css for login fields

* Fix playwright test

* Review fix

* More review fix

* Perform same checks when setting kdf

---------

Co-authored-by: Felix Eckhofer <felix@eckhofer.com>
Co-authored-by: Pablo Ovelleiro Corral <mail@pablo.tools>
Co-authored-by: Stuart Heap <sheap13@gmail.com>
Co-authored-by: Alex Moore <skiepp@my-dockerfarm.cloud>
Co-authored-by: Brian Munro <brian.alexander.munro@gmail.com>
Co-authored-by: Jacques B. <timshel@github.com>
Co-authored-by: Timshel <timshel@480s>

src/api/core/two_factor/email.rs

@@ -10,7 +10,7 @@ use crate::{
     auth::Headers,
     crypto,
     db::{
-        models::{EventType, TwoFactor, TwoFactorType, User, UserId},
+        models::{DeviceId, EventType, TwoFactor, TwoFactorType, User, UserId},
         DbConn,
     },
     error::{Error, MapResult},
@@ -24,11 +24,15 @@ pub fn routes() -> Vec<Route> {
 #[derive(Deserialize)]
 #[serde(rename_all = "camelCase")]
 struct SendEmailLoginData {
-    // DeviceIdentifier: String, // Currently not used
+    device_identifier: DeviceId,
+
+    #[allow(unused)]
     #[serde(alias = "Email")]
-    email: String,
+    email: Option<String>,
+
+    #[allow(unused)]
     #[serde(alias = "MasterPasswordHash")]
-    master_password_hash: String,
+    master_password_hash: Option<String>,
 }
 
 /// User is trying to login and wants to use email 2FA.
@@ -40,15 +44,10 @@ async fn send_email_login(data: Json<SendEmailLoginData>, mut conn: DbConn) -> E
     use crate::db::models::User;
 
     // Get the user
-    let Some(user) = User::find_by_mail(&data.email, &mut conn).await else {
-        err!("Username or password is incorrect. Try again.")
+    let Some(user) = User::find_by_device_id(&data.device_identifier, &mut conn).await else {
+        err!("Cannot find user. Try again.")
     };
 
-    // Check password
-    if !user.check_valid_password(&data.master_password_hash) {
-        err!("Username or password is incorrect. Try again.")
-    }
-
     if !CONFIG._enable_email_2fa() {
         err!("Email 2FA is disabled")
     }