api: add list_domains

src/api2/access/domain.rs

@@ -0,0 +1,42 @@
+use failure::*;
+
+use serde_json::{json, Value};
+
+use proxmox::api::api;
+use proxmox::api::router::Router;
+
+use crate::api2::types::*;
+
+#[api(
+    returns: {
+        description: "List of realms.",
+        type: Array,
+        items: {
+            type: Object,
+            description: "User configuration (without password).",
+            properties: {
+                realm: {
+                    description: "Realm ID.",
+                    type: String,
+                },
+                comment: {
+                    schema: SINGLE_LINE_COMMENT_SCHEMA,
+                    optional: true,
+                },
+            },
+        }
+    }
+)]
+/// Authentication domain/realm index.
+///
+/// Anyone can access this, because we need that list for the login
+/// box (before the user is authenticated).
+fn list_domains() -> Result<Value, Error> {
+    let mut list = Vec::new();
+    list.push(json!({ "realm": "pam", "comment": "Linux PAM standard authentication" }));
+    list.push(json!({ "realm": "pbs", "comment": "Proxmox Backup authentication server" }));
+    Ok(list.into())
+}
+
+pub const ROUTER: Router = Router::new()
+    .get(&API_METHOD_LIST_DOMAINS);