Stronghold

GitHub npm crates.io

API Reference

Store secrets and keys using the IOTA Stronghold secret management engine.

Supported Platforms

This plugin requires a Rust version of at least 1.75

Platform	Level	Notes
windows
linux
macos
android
ios

Setup

Install the stronghold plugin to get started.

Automatic

Use your project’s package manager to add the dependency:

npm

npm run tauri add stronghold

yarn

yarn run tauri add stronghold

pnpm

pnpm tauri add stronghold

bun

bun tauri add stronghold

cargo

cargo tauri add stronghold

Manual

1. Run the following command in the src-tauri folder to add the plugin to the project’s dependencies in Cargo.toml:

   cargo add tauri-plugin-stronghold

2. Modify lib.rs to initialize the plugin:

   src-tauri/src/lib.rs

   #[cfg_attr(mobile, tauri::mobile_entry_point)]
   pub fn run() {
       tauri::Builder::default()
           .plugin(tauri_plugin_stronghold::Builder::new(|password| {}).build())
           .run(tauri::generate_context!())
           .expect("error while running tauri application");
   }

3. Install the JavaScript Guest bindings using your preferred JavaScript package manager:

   npm

   npm install @tauri-apps/plugin-stronghold

   yarn

   yarn add @tauri-apps/plugin-stronghold

   pnpm

   pnpm add @tauri-apps/plugin-stronghold

   bun

   bun add @tauri-apps/plugin-stronghold

Usage

The plugin must be initialized with a password hash function, which takes the password string and must return a 32 bytes hash derived from it.

Initialize with argon2 password hash function

The Stronghold plugin offers a default hash function using the argon2 algorithm.

src-tauri/src/lib.rs

use tauri::Manager;

pub fn run() {
    tauri::Builder::default()
        .setup(|app| {
            let salt_path = app
                .path()
                .app_local_data_dir()
                .expect("could not resolve app local data path")
                .join("salt.txt");
            app.handle().plugin(tauri_plugin_stronghold::Builder::with_argon2(&salt_path).build())?;
            Ok(())
        })
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

Initialize with custom password hash function

Alternatively you can provide your own hash algorithm by using the tauri_plugin_stronghold::Builder::new constructor.

Note

The password hash must contain exactly 32 bytes. This is a Stronghold requirement.

src-tauri/src/lib.rs

pub fn run() {
    tauri::Builder::default()
        .plugin(
            tauri_plugin_stronghold::Builder::new(|password| {
                // Hash the password here with e.g. argon2, blake2b or any other secure algorithm
                // Here is an example implementation using the `rust-argon2` crate for hashing the password
                use argon2::{hash_raw, Config, Variant, Version};

                let config = Config {
                    lanes: 4,
                    mem_cost: 10_000,
                    time_cost: 10,
                    variant: Variant::Argon2id,
                    version: Version::Version13,
                    ..Default::default()
                };
                let salt = "your-salt".as_bytes();
                let key = hash_raw(password.as_ref(), salt, &config).expect("failed to hash password");

                key.to_vec()
            })
            .build(),
        )
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}

Usage from JavaScript

The stronghold plugin is available in JavaScript.

import { Client, Stronghold } from '@tauri-apps/plugin-stronghold';
// when using `"withGlobalTauri": true`, you may use
// const { Client, Stronghold } = window.__TAURI__.stronghold;
import { appDataDir } from '@tauri-apps/api/path';
// when using `"withGlobalTauri": true`, you may use
// const { appDataDir } = window.__TAURI__.path;

const initStronghold = async () => {
  const vaultPath = `${await appDataDir()}/vault.hold`;
  const vaultPassword = 'vault password';
  const stronghold = await Stronghold.load(vaultPath, vaultPassword);

  let client: Client;
  const clientName = 'name your client';
  try {
    client = await stronghold.loadClient(clientName);
  } catch {
    client = await stronghold.createClient(clientName);
  }

  return {
    stronghold,
    client,
  };
};

// Insert a record to the store
async function insertRecord(store: any, key: string, value: string) {
  const data = Array.from(new TextEncoder().encode(value));
  await store.insert(key, data);
}

// Read a record from store
async function getRecord(store: any, key: string): Promise<string> {
  const data = await store.get(key);
  return new TextDecoder().decode(new Uint8Array(data));
}

const { stronghold, client } = await initStronghold();

const store = client.getStore();
const key = 'my_key';

// Insert a record to the store
insertRecord(store, key, 'secret value');

// Read a record from store
const value = await getRecord(store, key);
console.log(value); // 'secret value'

// Save your updates
await stronghold.save();

// Remove a record from store
await store.remove(key);

Permissions

By default all potentially dangerous plugin commands and scopes are blocked and cannot be accessed. You must modify the permissions in your capabilities configuration to enable these.

See the Capabilities Overview for more information and the step by step guide to use plugin permissions.

src-tauri/capabilities/main.json

{
  ...,
  "permissions": [
    "stronghold:default",
  ]
}

Default Permission

This permission set configures what kind of operations are available from the stronghold plugin.

Granted Permissions

All non-destructive operations are enabled by default.

• allow-create-client
• allow-get-store-record
• allow-initialize
• allow-execute-procedure
• allow-load-client
• allow-save-secret
• allow-save-store-record
• allow-save

Permission Table

Identifier	Description
stronghold:allow-create-client	Enables the create_client command without any pre-configured scope.
stronghold:deny-create-client	Denies the create_client command without any pre-configured scope.
stronghold:allow-destroy	Enables the destroy command without any pre-configured scope.
stronghold:deny-destroy	Denies the destroy command without any pre-configured scope.
stronghold:allow-execute-procedure	Enables the execute_procedure command without any pre-configured scope.
stronghold:deny-execute-procedure	Denies the execute_procedure command without any pre-configured scope.
stronghold:allow-get-store-record	Enables the get_store_record command without any pre-configured scope.
stronghold:deny-get-store-record	Denies the get_store_record command without any pre-configured scope.
stronghold:allow-initialize	Enables the initialize command without any pre-configured scope.
stronghold:deny-initialize	Denies the initialize command without any pre-configured scope.
stronghold:allow-load-client	Enables the load_client command without any pre-configured scope.
stronghold:deny-load-client	Denies the load_client command without any pre-configured scope.
stronghold:allow-remove-secret	Enables the remove_secret command without any pre-configured scope.
stronghold:deny-remove-secret	Denies the remove_secret command without any pre-configured scope.
stronghold:allow-remove-store-record	Enables the remove_store_record command without any pre-configured scope.
stronghold:deny-remove-store-record	Denies the remove_store_record command without any pre-configured scope.
stronghold:allow-save	Enables the save command without any pre-configured scope.
stronghold:deny-save	Denies the save command without any pre-configured scope.
stronghold:allow-save-secret	Enables the save_secret command without any pre-configured scope.
stronghold:deny-save-secret	Denies the save_secret command without any pre-configured scope.
stronghold:allow-save-store-record	Enables the save_store_record command without any pre-configured scope.
stronghold:deny-save-store-record	Denies the save_store_record command without any pre-configured scope.