Allow enforcing Single Org with pw reset policy

Bitwarden only allows the Reset Password policy to be set when the Single Org policy is enabled already.
This PR adds a check so that this can be enforced when a config option is enabled.

Since Vaultwarden encouraged to use multiple orgs when groups were not available yet we should not enable this by default now.
This might be something to do in the future.

When enabled, it will prevent the Reset Password policy to be enabled if the Single Org policy is not enabled.
It will also prevent the Single Org policy to be disabled if the Reset Password policy is enabled.

Fixes dani-garcia#4855

Signed-off-by: BlackDex <black.dex@gmail.com>

.env.template

@@ -425,6 +425,12 @@
 ## KNOW WHAT YOU ARE DOING!
 # INCREASE_NOTE_SIZE_LIMIT=false
 
+## Enforce Single Org with Reset Password Policy
+## Enforce that the Single Org policy is enabled before setting the Reset Password policy
+## Bitwarden enforces this by default. In Vaultwarden we encouraged to use multiple organizations because groups were not available.
+## Setting this to true will enforce the Single Org Policy to be enabled before you can enable the Reset Password policy.
+# ENFORCE_SINGLE_ORG_WITH_RESET_PW_POLICY=false
+
 ########################
 ### MFA/2FA settings ###
 ########################

src/api/core/organizations.rs

@@ -1782,6 +1782,40 @@ async fn put_policy(
         None => err!("Invalid or unsupported policy type"),
     };
 
+    // Bitwarden only allows the Reset Password policy when Single Org policy is enabled
+    // Vaultwarden encouraged to use multiple orgs instead of groups because groups were not available in the past
+    // Now that groups are available we can enforce this option when wanted.
+    // We put this behind a config option to prevent breaking current installation.
+    // Maybe we want to enable this by default in the future, but currently it is disabled by default.
+    if CONFIG.enforce_single_org_with_reset_pw_policy()
+        && (pol_type_enum == OrgPolicyType::ResetPassword || pol_type_enum == OrgPolicyType::SingleOrg)
+    {
+        if pol_type_enum == OrgPolicyType::ResetPassword && data.enabled {
+            let single_org_policy_enabled =
+                match OrgPolicy::find_by_org_and_type(org_id, OrgPolicyType::SingleOrg, &mut conn).await {
+                    Some(p) => p.enabled,
+                    None => false,
+                };
+
+            if !single_org_policy_enabled {
+                err!("Single Organization policy is not enabled. It is mandatory for this policy to be enabled.")
+            }
+        }
+
+        // Also prevent the Single Org Policy to be disabled if the Reset Password policy is enabled
+        if pol_type_enum == OrgPolicyType::SingleOrg && !data.enabled {
+            let reset_pw_policy_enabled =
+                match OrgPolicy::find_by_org_and_type(org_id, OrgPolicyType::ResetPassword, &mut conn).await {
+                    Some(p) => p.enabled,
+                    None => false,
+                };
+
+            if reset_pw_policy_enabled {
+                err!("Account recovery policy is enabled. It is not allowed to disable this policy.")
+            }
+        }
+    }
+
     // When enabling the TwoFactorAuthentication policy, revoke all members that do not have 2FA
     if pol_type_enum == OrgPolicyType::TwoFactorAuthentication && data.enabled {
         two_factor::enforce_2fa_policy_for_org(

src/config.rs

@@ -625,6 +625,11 @@ make_config! {
         increase_note_size_limit:      bool,  true,  def, false;
         /// Generated max_note_size value to prevent if..else matching during every check
         _max_note_size:                usize, false, gen, |c| if c.increase_note_size_limit {100_000} else {10_000};
+
+        /// Enforce Single Org with Reset Password Policy |> Enforce that the Single Org policy is enabled before setting the Reset Password policy
+        /// Bitwarden enforces this by default. In Vaultwarden we encouraged to use multiple organizations because groups were not available.
+        /// Setting this to true will enforce the Single Org Policy to be enabled before you can enable the Reset Password policy.
+        enforce_single_org_with_reset_pw_policy: bool, false, def, false;
     },
 
     /// Yubikey settings