Update KDF Configuration and processing

- Change default Password Hash KDF Storage from 100_000 to 600_000 iterations
- Update Password Hash when the default iteration value is different
- Validate password_iterations
- Validate client-side KDF to prevent it from being set lower than 100_000

src/api/core/accounts.rs

@@ -161,7 +161,7 @@ pub async fn _register(data: JsonUpcase<RegisterData>, mut conn: DbConn) -> Json
         user.client_kdf_type = client_kdf_type;
     }
 
-    user.set_password(&data.MasterPasswordHash, None);
+    user.set_password(&data.MasterPasswordHash, true, None);
     user.akey = data.Key;
     user.password_hint = password_hint;
 
@@ -318,6 +318,7 @@ async fn post_password(
 
     user.set_password(
         &data.NewMasterPasswordHash,
+        true,
         Some(vec![String::from("post_rotatekey"), String::from("get_contacts"), String::from("get_public_keys")]),
     );
     user.akey = data.Key;
@@ -348,9 +349,13 @@ async fn post_kdf(data: JsonUpcase<ChangeKdfData>, headers: Headers, mut conn: D
         err!("Invalid password")
     }
 
+    if data.KdfIterations < 100_000 {
+        err!("KDF iterations lower then 100000 are not allowed.")
+    }
+
     user.client_kdf_iter = data.KdfIterations;
     user.client_kdf_type = data.Kdf;
-    user.set_password(&data.NewMasterPasswordHash, None);
+    user.set_password(&data.NewMasterPasswordHash, true, None);
     user.akey = data.Key;
     let save_result = user.save(&mut conn).await;
 
@@ -560,7 +565,7 @@ async fn post_email(
     user.email_new = None;
     user.email_new_token = None;
 
-    user.set_password(&data.NewMasterPasswordHash, None);
+    user.set_password(&data.NewMasterPasswordHash, true, None);
     user.akey = data.Key;
     let save_result = user.save(&mut conn).await;
 

src/api/core/emergency_access.rs

@@ -662,7 +662,7 @@ async fn password_emergency_access(
     };
 
     // change grantor_user password
-    grantor_user.set_password(new_master_password_hash, None);
+    grantor_user.set_password(new_master_password_hash, true, None);
     grantor_user.akey = key;
     grantor_user.save(&mut conn).await?;
 

src/api/identity.rs

@@ -130,7 +130,7 @@ async fn _password_login(
 
     // Get the user
     let username = data.username.as_ref().unwrap().trim();
-    let user = match User::find_by_mail(username, conn).await {
+    let mut user = match User::find_by_mail(username, conn).await {
         Some(user) => user,
         None => err!("Username or password is incorrect. Try again", format!("IP: {}. Username: {}.", ip.ip, username)),
     };
@@ -150,6 +150,16 @@ async fn _password_login(
         )
     }
 
+    // Change the KDF Iterations
+    if user.password_iterations != CONFIG.password_iterations() {
+        user.password_iterations = CONFIG.password_iterations();
+        user.set_password(password, false, None);
+
+        if let Err(e) = user.save(conn).await {
+            error!("Error updating user: {:#?}", e);
+        }
+    }
+
     // Check if the user is disabled
     if !user.enabled {
         err!(
@@ -172,7 +182,6 @@ async fn _password_login(
             if resend_limit == 0 || user.login_verify_count < resend_limit {
                 // We want to send another email verification if we require signups to verify
                 // their email address, and we haven't sent them a reminder in a while...
-                let mut user = user;
                 user.last_verifying_at = Some(now);
                 user.login_verify_count += 1;