src/actors/users_actor.rs

@@ -1,4 +1,5 @@
 use actix::{Actor, Context, Handler, Message, MessageResult};
+use std::net::IpAddr;
 
 use crate::data::entity_manager::EntityManager;
 use crate::data::user::{User, UserID};
@@ -50,6 +51,10 @@ pub struct ChangePasswordRequest {
 #[derive(Debug)]
 pub struct ChangePasswordResult(pub bool);
 
+#[derive(Message)]
+#[rtype(result = "bool")]
+pub struct AddSuccessful2FALogin(pub UserID, pub IpAddr);
+
 #[derive(Debug)]
 pub struct UpdateUserResult(pub bool);
 
@@ -111,6 +116,15 @@ impl Handler<ChangePasswordRequest> for UsersActor {
     }
 }
 
+impl Handler<AddSuccessful2FALogin> for UsersActor {
+    type Result = <AddSuccessful2FALogin as actix::Message>::Result;
+
+    fn handle(&mut self, msg: AddSuccessful2FALogin, _ctx: &mut Self::Context) -> Self::Result {
+        self.manager
+            .save_new_successful_2fa_authentication(&msg.0, msg.1)
+    }
+}
+
 impl Handler<GetUserRequest> for UsersActor {
     type Result = MessageResult<GetUserRequest>;
 

src/constants.rs

@@ -19,6 +19,10 @@ pub const MAX_INACTIVITY_DURATION: u64 = 60 * 30;
 /// Maximum session duration (6 hours)
 pub const MAX_SESSION_DURATION: u64 = 3600 * 6;
 
+/// When the user successfully authenticate using 2FA, period of time during which the user is
+/// exempted from this IP address to use 2FA
+pub const SECOND_FACTOR_EXEMPTION_AFTER_SUCCESSFUL_LOGIN: u64 = 7 * 24 * 3600;
+
 /// Minimum password length
 pub const MIN_PASS_LEN: usize = 4;
 

src/controllers/admin_controller.rs

@@ -55,6 +55,7 @@ pub struct UpdateUserQuery {
     email: String,
     gen_new_password: Option<String>,
     enabled: Option<String>,
+    two_factor_exemption_after_successful_login: Option<String>,
     admin: Option<String>,
     grant_type: String,
     granted_clients: String,
@@ -84,6 +85,10 @@ pub async fn users_route(
         user.last_name = update.0.last_name;
         user.email = update.0.email;
         user.enabled = update.0.enabled.is_some();
+        user.two_factor_exemption_after_successful_login = update
+            .0
+            .two_factor_exemption_after_successful_login
+            .is_some();
         user.admin = update.0.admin.is_some();
 
         let factors_to_keep = update.0.two_factor.split(';').collect::<Vec<_>>();

src/controllers/login_api.rs

@@ -1,3 +1,7 @@
+use crate::actors::users_actor;
+use crate::actors::users_actor::UsersActor;
+use crate::data::remote_ip::RemoteIP;
+use actix::Addr;
 use actix_identity::Identity;
 use actix_web::{web, HttpRequest, HttpResponse, Responder};
 use webauthn_rs::prelude::PublicKeyCredential;
@@ -16,6 +20,8 @@ pub async fn auth_webauthn(
     req: web::Json<AuthWebauthnRequest>,
     manager: WebAuthManagerReq,
     http_req: HttpRequest,
+    remote_ip: RemoteIP,
+    users: web::Data<Addr<UsersActor>>,
 ) -> impl Responder {
     if !SessionIdentity(Some(&id)).need_2fa_auth() {
         return HttpResponse::Unauthorized().json("No 2FA required!");
@@ -25,6 +31,11 @@ pub async fn auth_webauthn(
 
     match manager.finish_authentication(&user_id, &req.opaque_state, &req.credential) {
         Ok(_) => {
+            users
+                .send(users_actor::AddSuccessful2FALogin(user_id, remote_ip.0))
+                .await
+                .unwrap();
+
             SessionIdentity(Some(&id)).set_status(&http_req, SessionStatus::SignedIn);
             HttpResponse::Ok().body("You are authenticated!")
         }

src/controllers/login_controller.rs

@@ -139,7 +139,8 @@ pub async fn login_route(
             LoginResult::Success(user) => {
                 let status = if user.need_reset_password {
                     SessionStatus::NeedNewPassword
-                } else if user.has_two_factor() {
+                } else if user.has_two_factor() && !user.can_bypass_two_factors_for_ip(remote_ip.0)
+                {
                     SessionStatus::Need2FA
                 } else {
                     SessionStatus::SignedIn
@@ -326,6 +327,7 @@ pub async fn login_with_otp(
     form: Option<web::Form<LoginWithOTPForm>>,
     users: web::Data<Addr<UsersActor>>,
     http_req: HttpRequest,
+    remote_ip: RemoteIP,
 ) -> impl Responder {
     let mut danger = None;
 
@@ -354,6 +356,11 @@ pub async fn login_with_otp(
         {
             danger = Some("Specified code is invalid!".to_string());
         } else {
+            users
+                .send(users_actor::AddSuccessful2FALogin(user.uid, remote_ip.0))
+                .await
+                .unwrap();
+
             SessionIdentity(id.as_ref()).set_status(&http_req, SessionStatus::SignedIn);
             return redirect_user(query.redirect.get());
         }

src/data/user.rs

@@ -1,9 +1,13 @@
+use crate::constants::SECOND_FACTOR_EXEMPTION_AFTER_SUCCESSFUL_LOGIN;
 use crate::data::client::ClientID;
 use crate::data::entity_manager::EntityManager;
 use crate::data::login_redirect::LoginRedirect;
 use crate::data::totp_key::TotpKey;
 use crate::data::webauthn_manager::WebauthnPubKey;
 use crate::utils::err::Res;
+use crate::utils::time::time;
+use std::collections::HashMap;
+use std::net::IpAddr;
 
 #[derive(Clone, Debug, Eq, PartialEq, serde::Serialize, serde::Deserialize)]
 pub struct UserID(pub String);
@@ -76,6 +80,15 @@ pub struct User {
     #[serde(default)]
     pub two_factor: Vec<TwoFactor>,
 
+    /// Exempt the user from validating a second factor after a previous successful authentication
+    /// for a defined amount of time
+    #[serde(default)]
+    pub two_factor_exemption_after_successful_login: bool,
+
+    /// IP addresses of last successful logins
+    #[serde(default)]
+    pub last_successful_2fa: HashMap<IpAddr, u64>,
+
     /// None = all services
     /// Some([]) = no service
     pub authorized_clients: Option<Vec<ClientID>>,
@@ -101,6 +114,13 @@ impl User {
         !self.two_factor.is_empty()
     }
 
+    pub fn can_bypass_two_factors_for_ip(&self, ip: IpAddr) -> bool {
+        self.two_factor_exemption_after_successful_login
+            && self.last_successful_2fa.get(&ip).unwrap_or(&0)
+                + SECOND_FACTOR_EXEMPTION_AFTER_SUCCESSFUL_LOGIN
+                > time()
+    }
+
     pub fn add_factor(&mut self, factor: TwoFactor) {
         self.two_factor.push(factor);
     }
@@ -178,6 +198,8 @@ impl Default for User {
             enabled: true,
             admin: false,
             two_factor: vec![],
+            two_factor_exemption_after_successful_login: false,
+            last_successful_2fa: Default::default(),
             authorized_clients: Some(Vec::new()),
         }
     }
@@ -249,4 +271,11 @@ impl EntityManager<User> {
             user
         })
     }
+
+    pub fn save_new_successful_2fa_authentication(&mut self, id: &UserID, ip: IpAddr) -> bool {
+        self.update_user(id, |mut user| {
+            user.last_successful_2fa.insert(ip, time());
+            user
+        })
+    }
 }

templates/settings/edit_user.html

@@ -12,7 +12,7 @@
     <!-- User name -->
     <div class="form-group">
         <label class="form-label mt-4" for="username">Username</label>
-        <input class="form-control" id="username" type="text"
+        <input class="form-control" id="username" type="text" autocomplete="nope"
                name="username" value="{{ u.username }}" required/>
         <div class="valid-feedback">This username is valid</div>
         <div class="invalid-feedback">This username is already taken.</div>
@@ -51,17 +51,27 @@
 
         <!-- Enabled -->
         <div class="form-check">
-            <input class="form-check-input" type="checkbox" name="enabled" id="enabled" {% if u.enabled %} checked="" {%
-                   endif %}>
+            <input class="form-check-input" type="checkbox" name="enabled" id="enabled"
+                   {% if u.enabled %} checked="" {% endif %}>
             <label class="form-check-label" for="enabled">
                 Enabled
             </label>
         </div>
 
+        <!-- 2FA exemption after successful login -->
+        <div class="form-check">
+            <input class="form-check-input" type="checkbox" name="two_factor_exemption_after_successful_login"
+                   id="two_factor_exemption_after_successful_login"
+                   {% if u.two_factor_exemption_after_successful_login %} checked="" {% endif %}>
+            <label class="form-check-label" for="two_factor_exemption_after_successful_login">
+                Exempt user from 2FA authentication for an IP address after a successful login for a limited time
+            </label>
+        </div>
+
         <!-- Admin -->
         <div class="form-check">
-            <input class="form-check-input" type="checkbox" name="admin" id="admin" {% if u.admin %} checked="" {% endif
-                   %}>
+            <input class="form-check-input" type="checkbox" name="admin" id="admin"
+                   {% if u.admin %} checked="" {% endif %}>
             <label class="form-check-label" for="admin">
                 Grant admin privileges
             </label>
@@ -190,6 +200,7 @@
 
         form.submit();
     });
+
 </script>
 
 {% endblock content %}