# flutter_secure_storage_windows 4.2.2

Windows implementation of flutter_secure_storage. Please use flutter_secure_storage instead of this package.




## Installing
```
export PUB_HOSTED_URL=https://pub.mirror.p-hatan.com
flutter pub add 'flutter_secure_storage_windows:4.2.2'
```
Published: 2026-05-22T21:17:44.277981Z
Expected archive SHA-256: 471951813a97006d899db4948acc654a4f28c440083ea08178935ce20b173ec1

Available in cache; verification: upstream_checksum
## Direct dependencies
- ffi: ^2.2.0
- flutter: map[sdk:flutter]
- flutter_secure_storage_platform_interface: ^2.0.0
- path: ^1.9.1
- path_provider: ^2.1.5
- path_provider_platform_interface: ^2.1.2
- win32: ^6.0.1

## Package README (untrusted upstream documentation)
# flutter_secure_storage_windows

This is the platform-specific implementation of `flutter_secure_storage` for Windows.

## Features

In the Windows implementation of the flutter_secure_storage plugin, sensitive data is securely stored using a combination of local file storage and the Windows Credential Manager. The storage mechanism ensures both confidentiality and integrity through encryption and controlled access.

When a key-value pair is stored, the value is encrypted using the AES-GCM (Galois/Counter Mode) encryption algorithm. The plugin generates a unique encryption key, securely managed and stored in the Windows Credential Manager. This key is used to encrypt the value, and the resulting encrypted data is saved to a file in the application's support directory. Each file is named after the key (with a .secure extension) and contains the encrypted value along with a nonce (used for AES-GCM encryption) and an authentication tag to verify the integrity of the data during decryption.

The directory for storing these files is dynamically determined based on the application's context, ensuring isolation and protection against unauthorized access. Additionally, for backward compatibility, the plugin can store and retrieve data directly from the Windows Credential Manager if needed. This hybrid approach leverages the security of encrypted local storage and the reliability of the Credential Manager, ensuring robust data protection for Flutter applications running on Windows.

## Installation

Ensure the required C++ ATL libraries are installed alongside Visual Studio Build Tools.

## Usage

Refer to the main [flutter_secure_storage README](../README.md) for common usage instructions.

## License

This project is licensed under the BSD 3 License. See the [LICENSE](../LICENSE) file for details.

## Changelog
## 4.2.2
Fixed `deleteAll` and `containsKey` not acquiring the mutex lock, which could cause data races under concurrent access.

## 4.2.1
Fix concurrent read/write operations causing data loss or a `PathAccessException` on Windows (issue #634).

## 4.2.0
Fix DPAPI FFI calls for compatibility with `win32` 6.0.0.

## 4.1.0
Upgrades deprecated member usage of win32.

## 4.0.0
- This plugin requires a minimum dart sdk of 3.3.0 or higher and a minimum flutter version of 3.19.0.
- Migrated to new analyzer and clean-up code.
- Migrates to `win32` version 5.5.4 to support Dart 3.4 / Flutter 3.22.0.

## 3.1.2
Reverts onCupertinoProtectedDataAvailabilityChanged and isCupertinoProtectedDataAvailable.

## 3.1.1
Updated flutter_secure_storage_platform_interface to latest version.

## 3.1.0
Fixed CompanyName and CompanyProduct on Windows are ignored when the lang-charset in the Runner.rc file is not 040904e4

## 3.0.0
- Migrated to win32 package replacing C.
- Changed PathNotFoundException to FileSystemException to be backwards compatible with Flutter SDK 2.12.0
- Applied lint suggestions

## 2.1.1
Revert changes made in version 2.1.0 due to breaking changes.
These changes will be republished under a new major version number 3.0.0.

## 2.1.0
- Changed PathNotFoundException to FileSystemException to be backwards compatible with Flutter SDK 2.12.0
- Applied lint suggestions

## 2.0.0
Write encrypted data to files instead of the windows credential system.

## 1.1.3
Updated flutter_secure_storage_platform_interface to latest version.

## 1.1.2
- Silently ignore errors when deleting keys that don't exist

## 1.1.1
- Fix application crash when key doesn't exists.

## 1.1.0
Features
- Add readAll, deleteAll and containsKey functions.

Bugfixes
- Fix implementation of delete operation to allow null value.

## 1.0.0
- Initial Windows implementation