tfa: remove tfa user when a user is deleted

Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>

src/api2/access/user.rs

@@ -437,6 +437,7 @@ pub fn update_user(
 /// Remove a user from the configuration file.
 pub fn delete_user(userid: Userid, digest: Option<String>) -> Result<(), Error> {
 
+    let _tfa_lock = crate::config::tfa::write_lock()?;
     let _lock = open_file_locked(user::USER_CFG_LOCKFILE, std::time::Duration::new(10, 0), true)?;
 
     let (mut config, expected_digest) = user::config()?;
@@ -453,6 +454,19 @@ pub fn delete_user(userid: Userid, digest: Option<String>) -> Result<(), Error>
 
     user::save_config(&config)?;
 
+    match crate::config::tfa::read().and_then(|mut cfg| {
+        let _: bool = cfg.remove_user(&userid);
+        crate::config::tfa::write(&cfg)
+    }) {
+        Ok(()) => (),
+        Err(err) => {
+            eprintln!(
+                "error updating TFA config after deleting user {:?}: {}",
+                userid, err
+            );
+        }
+    }
+
     Ok(())
 }
 

src/config/tfa.rs

@@ -247,6 +247,18 @@ impl TfaConfig {
             None => bail!("no 2nd factor available for user '{}'", userid),
         }
     }
+
+    /// Remove non-existent users.
+    pub fn cleanup_users(&mut self, config: &proxmox::api::section_config::SectionConfigData) {
+        use crate::config::user::User;
+        self.users
+            .retain(|user, _| config.lookup::<User>("user", user.as_str()).is_ok());
+    }
+
+    /// Remove a user. Returns `true` if the user actually existed.
+    pub fn remove_user(&mut self, user: &Userid) -> bool {
+        self.users.remove(user).is_some()
+    }
 }
 
 #[api]