Add Create User rpc method

src/api/mod.rs

@@ -45,6 +45,10 @@ pub fn new_rpc_module(state: RpcState) -> RpcModule<RpcState> {
         .register_method("system.get_users", system::get_users)
         .unwrap();
 
+    module
+        .register_method("system.create_user", system::create_user)
+        .unwrap();
+
     module
         .register_method("network.get_static_routes", network::get_static_routes)
         .unwrap();

src/api/system.rs

@@ -2,9 +2,46 @@ use std::collections::HashMap;
 
 use crate::{definitions::system::User, state::RpcState};
 use jsonrpsee::types::Params;
+use pwhash::sha512_crypt;
+use serde::Deserialize;
 
 use super::ApiError;
 
 pub fn get_users(_: Params, state: &RpcState) -> Result<HashMap<String, User>, ApiError> {
     Ok(state.config_manager.get_pending_config().system.users)
 }
+
+#[derive(Deserialize)]
+struct CreateUser {
+    name: String,
+    password: String,
+    comment: String,
+}
+
+pub fn create_user(p: Params, state: &RpcState) -> Result<(), ApiError> {
+    let u: CreateUser = p.parse().unwrap();
+
+    let hash = sha512_crypt::hash(u.password).unwrap();
+
+    let mut cm = state.config_manager.clone();
+    let mut tx = cm.start_transaction();
+
+    if tx
+        .changes
+        .system
+        .users
+        .insert(
+            u.name,
+            User {
+                comment: u.comment,
+                hash: hash,
+            },
+        )
+        .is_none()
+    {
+        return tx.commit().map_err(|source| ApiError::InvalidParams);
+    } else {
+        tx.revert();
+        Err(ApiError::InvalidParams)
+    }
+}