docs: update readmes/licences

README.md

@@ -1,10 +1,3 @@
-/*
- * Copyright 2019-2023 Hugo Pointcheval
- * 
- * Use of this source code is governed by an MIT-style
- * license that can be found in the LICENSE file or at
- * https://opensource.org/licenses/MIT.
- */
 <p align="center">
 <img width="700px" src="resources/native_crypto.png" style="background-color: rgb(255, 255, 255)">
 <h5 align="center">Fast and powerful cryptographic functions for Flutter.</h5>
@@ -42,34 +35,127 @@ For comparison, on a *iPhone 13*, you can encrypt/decrypt a message of **2MiB**
 
 In short, NativeCrypto is incomparable with PointyCastle.
 
+## Features
+
+* Hash functions
+    - SHA-256
+    - SHA-384
+    - SHA-512
+* HMAC functions
+    - HMAC-SHA-256
+    - HMAC-SHA-384
+    - HMAC-SHA-512
+* Secure random
+* PBKDF2
+* AES
+    - Uint8List encryption/decryption
+    - File encryption/decryption
+
+## Quick start
+
+```dart
+import 'package:native_crypto/native_crypto.dart';
+
+Future<void> main() async {
+    // Message to encrypt
+    final Uint8List message = 'Hello World!'.toBytes();
+    
+    // Ask user for a password
+    final String password = await getPassword();
+
+    // Initialize a PBKDF2 object
+    final Pbkdf2 pbkdf2 = Pbkdf2(
+        length: 32, // 32 bytes
+        iterations: 1000,
+        salt: 'salt'.toBytes(),
+        hashAlgorithm: HashAlgorithm.sha256,
+    );
+    
+    // Derive a secret key from the password
+    final SecretKey secretKey = await pbkdf2(password: password);
+
+    // Initialize an AES cipher
+    final AES cipher = AES(
+        key: secretKey,
+        mode: AESMode.gcm,
+        padding: AESPadding.none,
+    );
+
+    // Encrypt the message
+    final CipherText<AESCipherChunk> cipherText = await cipher.encrypt(message);
+
+    // Decrypt the message
+    final Uint8List decryptedMessage = await cipher.decrypt(cipherText);
+
+    // Verify and print the decrypted message
+    assert(listEquals(message, decryptedMessage));
+    
+    print(decryptedMessage.toStr());
+}
+```
+
+Check the [example](./native_crypto/example) for a complete example.
+
+Please take a look a the compatibility table below to check if your target is supported.
+
+> Note: This **Flutter** example must run on a real device or a simulator.
+
 ## Usage
 
+#### Compatibility
+
 First, check compatibility with your targets.
 
 | iOS | Android | MacOS | Linux | Windows | Web |
 | --- | ------- | ----- | ----- | ------- | --- |
 | ✅  | ✅      | ❌     | ❌     | ❌      | ❌  |
 
+> Warning: NativeCrypto 0.2.0+ is not compatible with lower NativeCrypto versions. Especially, with NativeCrypto 0.0. X because the cipher mode is not the same. Now, NativeCrypto uses AES-GCM mode instead of AES-CBC mode. (See [Changelog](./CHANGELOG.md))
+
+NativeCrypto ciphertexts are formatted as follow:
+
+```
++------------------+--------------------+------------------+
+| Nonce (12 bytes) | Cipher text (n-28) |  Tag (16 bytes)  |
++------------------+--------------------+------------------+
+```
+
+> Warning: If your data comes from another source, make sur to use the same format.
+
 #### Hash
 
-To digest a message, you can use the following function:
+To digest a message, you'll need to initialize a Hasher object implementing `Hash` . Then, you can digest your message.
 
 ```dart
-Uint8List hash = await HashAlgorithm.sha256.digest(message);
+Hash hasher = Sha256();
+Uint8List digest = await hasher.digest(message);
 ```
 
 > In NativeCrypto, you can use the following hash functions: SHA-256, SHA-384, SHA-512
 
-#### Keys
+#### HMAC
 
-You can build a `SecretKey` from a utf8, base64, base16 (hex) strings or raw bytes. You can also generate a SecretKey from secure random.
+To generate a HMAC, you'll need to initialize a `Hmac` object. Then, you can generate a HMAC from a message and a secret key.
 
 ```dart
-SecretKey secretKey = SecretKey(Uint8List.fromList([0x73, 0x65, 0x63, 0x72, 0x65, 0x74]));
+Hmac hmac = HmacSha256();
+Uint8List hmac = await hmac.digest(message, secretKey);
+```
+
+> In NativeCrypto, you can use the following HMAC functions: HMAC-SHA-256, HMAC-SHA-384, HMAC-SHA-512
+
+#### Keys
+
+You can build a `SecretKey` from utf8, utf16, base64, base16 (hex) strings, int list or raw bytes. You can also generate a SecretKey from secure random.
+
+```dart
+SecretKey secretKey = SecretKey(bytes); // bytes is a Uint8List
 SecretKey secretKey = SecretKey.fromUtf8('secret');
+SecretKet secretKey = SecretKey.fromUtf16('secret');
 SecretKey secretKey = SecretKey.fromBase64('c2VjcmV0');
 SecretKey secretKey = SecretKey.fromBase16('63657274');
-SecretKey secretKey = await SecretKey.fromSecureRandom(256);
+SecretKey secretKey = SecretKey.fromList([0x73, 0x65, 0x63, 0x72, 0x65, 0x74]);
+SecretKey secretKey = await SecretKey.fromSecureRandom(32); // 32 bytes
 ```
 
 #### Key derivation
@@ -79,20 +165,21 @@ You can derive a `SecretKey` using **PBKDF2**.
 First, you need to initialize a `Pbkdf2` object.
 
 ```dart
-Pbkdf2 pbkdf2 = Pbkdf2(
-    keyBytesCount: 32,
+final Pbkdf2 pbkdf2 = Pbkdf2(
+    length: 32, // 32 bytes
     iterations: 1000,
-    algorithm: HashAlgorithm.sha512,
+    salt: salt.toBytes(),
+    hashAlgorithm: HashAlgorithm.sha256,
 );
 ```
 
-Then, you can derive a `SecretKey` from a password and salt.
+Then, you can derive a `SecretKey` from a password.
 
 ```dart
-SecretKey secretKey = await pbkdf2.derive(password: password, salt: 'salt');
+SecretKey secretKey = await pbkdf2(password: password); 
 ```
 
-> In NativeCrypto, you can use the following key derivation function: PBKDF2
+> Note: Pbkdf2 is a callable class. You can use it like a function.
 
 #### Cipher
 
@@ -101,44 +188,79 @@ And now, you can use the `SecretKey` to encrypt/decrypt a message.
 First, you need to initialize a `Cipher` object.
 
 ```dart
-AES cipher = AES(secretKey);
+final AES cipher = AES(
+    key: key,
+    mode: AESMode.gcm,
+    padding: AESPadding.none,
+);
 ```
 
 Then, you can encrypt your message.
 
 ```dart
-CipherTextWrapper wrapper = await cipher.encrypt(message);
-
-CipherText cipherText = wrapper.unwrap<CipherText>();
-// same as
-CipherText cipherText = wrapper.single;
-
-// or
-
-List<CipherText> cipherTexts = wrapper.unwrap<List<CipherText>>();
-// same as
-List<CipherText> cipherTexts = wrapper.list;
+final CipherText<AESCipherChunk> cipherText = await cipher.encrypt(message); 
 ```
 
-After an encryption you obtain a `CipherTextWrapper` which contains `CipherText` or `List<CipherText>` depending on the message size. It's up to you to know how to unwrap the `CipherTextWrapper` depending the chunk size you configured.
+After an encryption you obtain a `CipherText` which contains chunks. You can get the underlying bytes with `cipherText.bytes` .
 
-Uppon receiving encrypted message, you can decrypt it.
-You have to reconstruct the wrapper before decrypting.
+Uppon receiving encrypted message `receivedData` , you can decrypt it.
+You have to reconstruct the ciphertext and the setup the chunk factory.
 
 ```dart
-CipherTextWrapper wrapper = CipherTextWrapper.fromBytes(
-    data,
-    ivLength: AESMode.gcm.ivLength,
-    tagLength: AESMode.gcm.tagLength,
-);
+final CipherText<AESCipherChunk> receivedCipherText CipherText(
+    receivedData,
+    chunkFactory: (bytes) => AESCipherChunk(
+        bytes,
+        ivLength: cipher.mode.ivLength,
+        tagLength: cipher.mode.tagLength,
+    ),
+),
 ```
 
 Then, you can decrypt your message.
 
 ```dart
-Uint8List message = await cipher.decrypt(wrapper);
+Uint8List message = await cipher.decrypt(receivedCipherText);
 ```
 
+#### Files
+
+You can encrypt/decrypt files.
+
+First, you need to initialize a `Cipher` object.
+
+```dart
+final AES cipher = AES(
+    key: key,
+    mode: AESMode.gcm,
+    padding: AESPadding.none,
+);
+```
+
+Then, you can encrypt your file.
+
+```dart
+await cipher.encryptFile(plainText, cipherText);
+```
+
+> Note: `plainText` and `cipherText` are `File` objects.
+
+You can decrypt your file.
+
+```dart
+await cipher.decryptFile(cipherText, plainText);
+```
+
+#### Advanced
+
+You can force the use of a specific IV. Please note that the IV must be unique for each encryption.
+
+```dart
+final CipherText<AESCipherChunk> cipherText = await cipher.encryptWithIV(message, iv);
+```
+
+⚠️ Use `encrypt(...)` instead of `encryptWithIV(...)` if you don't know what you are doing.
+
 ## Development
 
 ### Android

packages/native_crypto/LICENSE

@@ -2,7 +2,7 @@ NativeCrypto
 
 MIT License
 
-Copyright (c) 2019 - 2022 Hugo Pointcheval
+Copyright (c) 2019 - 2023 Hugo Pointcheval
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

packages/native_crypto/README.md

@@ -1,133 +1,3 @@
-<p align="center">
-<img width="700px" src="resources/native_crypto.png" style="background-color: rgb(255,255,255)">
-<h5 align="center">Fast and powerful cryptographic functions for Flutter.</h5>
-</p>
+# NativeCrypto
 
-<p align="center">
-<a href="https://git.wyatt-studio.fr/Wyatt-FOSS/wyatt-packages/src/branch/master/packages/wyatt_analysis">
-<img src="https://img.shields.io/badge/Style-Wyatt%20Analysis-blue.svg?style=flat-square" alt="Style: Wyatt Analysis" />
-</a>
-
-<a href="https://github.com/invertase/melos">
-<img src="https://img.shields.io/badge/Maintained%20with-melos-f700ff.svg?style=flat-square" alt="Maintained with Melos" />
-</a>
-
-<a href="https://drone.wyatt-studio.fr/hugo/native-crypto">
-<img src="https://drone.wyatt-studio.fr/api/badges/hugo/native-crypto/status.svg" alt="Build Status" />
-</a>
-</p>
-
----
-
-[[Changelog]](./CHANGELOG.md) | [[License]](./LICENSE)
-
----
-
-## About
-
-The goal of this plugin is to provide a fast and powerful cryptographic functions by calling native libraries. On Android, it uses [javax.cypto](https://developer.android.com/reference/javax/crypto/package-summary), and on iOS, it uses [CommonCrypto](https://opensource.apple.com/source/CommonCrypto/) and [CryptoKit](https://developer.apple.com/documentation/cryptokit/)
-
-I started this projet because I wanted to add cryptographic functions on a Flutter app. But I faced a problem with the well-known [Pointy Castle](https://pub.dev/packages/pointycastle) library: the performance was very poor. Here some benchmarks and comparison:
-
-![](resources/benchmarks.png)
-
-For comparison, on a *iPhone 13*, you can encrypt/decrypt a message of **2MiB** in **~5.6s** with PointyCastle and in **~40ms** with NativeCrypto. And on an *OnePlus 5*, you can encrypt/decrypt a message of **50MiB** in **~6min30** with PointyCastle and in less than **~1s** with NativeCrypto.
-
-In short, NativeCrypto is incomparable with PointyCastle.
-
-## Usage
-
-First, check compatibility with your targets.
-
-| iOS | Android | MacOS | Linux | Windows | Web |
-| --- | ------- | ----- | ----- | ------- | --- |
-| ✅  | ✅      | ❌     | ❌     | ❌      | ❌  |
-
-#### Hash
-
-To digest a message, you can use the following function:
-
-```dart
-Uint8List hash = await HashAlgorithm.sha256.digest(message);
-```
-
-> In NativeCrypto, you can use the following hash functions: SHA-256, SHA-384, SHA-512
-
-#### Keys
-
-You can build a `SecretKey` from a utf8, base64, base16 (hex) strings or raw bytes. You can also generate a SecretKey from secure random.
-
-```dart
-SecretKey secretKey = SecretKey(Uint8List.fromList([0x73, 0x65, 0x63, 0x72, 0x65, 0x74]));
-SecretKey secretKey = SecretKey.fromUtf8('secret');
-SecretKey secretKey = SecretKey.fromBase64('c2VjcmV0');
-SecretKey secretKey = SecretKey.fromBase16('63657274');
-SecretKey secretKey = await SecretKey.fromSecureRandom(256);
-```
-
-#### Key derivation
-
-You can derive a `SecretKey` using **PBKDF2**.
-
-First, you need to initialize a `Pbkdf2` object.
-
-```dart
-Pbkdf2 pbkdf2 = Pbkdf2(
-    keyBytesCount: 32,
-    iterations: 1000,
-    algorithm: HashAlgorithm.sha512,
-);
-```
-
-Then, you can derive a `SecretKey` from a password and salt.
-
-```dart
-SecretKey secretKey = await pbkdf2.derive(password: password, salt: 'salt');
-```
-
-> In NativeCrypto, you can use the following key derivation function: PBKDF2
-
-#### Cipher
-
-And now, you can use the `SecretKey` to encrypt/decrypt a message.
-
-First, you need to initialize a `Cipher` object.
-
-```dart
-AES cipher = AES(secretKey);
-```
-
-Then, you can encrypt your message.
-
-```dart
-CipherTextWrapper wrapper = await cipher.encrypt(message);
-
-CipherText cipherText = wrapper.unwrap<CipherText>();
-// same as
-CipherText cipherText = wrapper.single;
-
-// or
-
-List<CipherText> cipherTexts = wrapper.unwrap<List<CipherText>>();
-// same as
-List<CipherText> cipherTexts = wrapper.list;
-```
-
-After an encryption you obtain a `CipherTextWrapper` which contains `CipherText` or `List<CipherText>` depending on the message size. It's up to you to know how to unwrap the `CipherTextWrapper` depending the chunk size you configured.
-
-Uppon receiving encrypted message, you can decrypt it.
-You have to reconstruct the wrapper before decrypting.
-
-```dart
-CipherTextWrapper wrapper = CipherTextWrapper.fromBytes(
-    data,
-    ivLength: AESMode.gcm.ivLength,
-    tagLength: AESMode.gcm.tagLength,
-);
-```
-
-Then, you can decrypt your message.
-
-```dart
-Uint8List message = await cipher.decrypt(wrapper);
-```
+Readme available at [project root](../../README.md).

packages/native_crypto/example/ios/Podfile.lock

@@ -1,21 +1,74 @@
 PODS:
+  - DKImagePickerController/Core (4.3.4):
+    - DKImagePickerController/ImageDataManager
+    - DKImagePickerController/Resource
+  - DKImagePickerController/ImageDataManager (4.3.4)
+  - DKImagePickerController/PhotoGallery (4.3.4):
+    - DKImagePickerController/Core
+    - DKPhotoGallery
+  - DKImagePickerController/Resource (4.3.4)
+  - DKPhotoGallery (0.0.17):
+    - DKPhotoGallery/Core (= 0.0.17)
+    - DKPhotoGallery/Model (= 0.0.17)
+    - DKPhotoGallery/Preview (= 0.0.17)
+    - DKPhotoGallery/Resource (= 0.0.17)
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Core (0.0.17):
+    - DKPhotoGallery/Model
+    - DKPhotoGallery/Preview
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Model (0.0.17):
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Preview (0.0.17):
+    - DKPhotoGallery/Model
+    - DKPhotoGallery/Resource
+    - SDWebImage
+    - SwiftyGif
+  - DKPhotoGallery/Resource (0.0.17):
+    - SDWebImage
+    - SwiftyGif
+  - file_picker (0.0.1):
+    - DKImagePickerController/PhotoGallery
+    - Flutter
   - Flutter (1.0.0)
   - native_crypto_ios (0.0.1):
     - Flutter
+  - SDWebImage (5.15.5):
+    - SDWebImage/Core (= 5.15.5)
+  - SDWebImage/Core (5.15.5)
+  - SwiftyGif (5.4.4)
 
 DEPENDENCIES:
+  - file_picker (from `.symlinks/plugins/file_picker/ios`)
   - Flutter (from `Flutter`)
   - native_crypto_ios (from `.symlinks/plugins/native_crypto_ios/ios`)
 
+SPEC REPOS:
+  trunk:
+    - DKImagePickerController
+    - DKPhotoGallery
+    - SDWebImage
+    - SwiftyGif
+
 EXTERNAL SOURCES:
+  file_picker:
+    :path: ".symlinks/plugins/file_picker/ios"
   Flutter:
     :path: Flutter
   native_crypto_ios:
     :path: ".symlinks/plugins/native_crypto_ios/ios"
 
 SPEC CHECKSUMS:
+  DKImagePickerController: b512c28220a2b8ac7419f21c491fc8534b7601ac
+  DKPhotoGallery: fdfad5125a9fdda9cc57df834d49df790dbb4179
+  file_picker: ce3938a0df3cc1ef404671531facef740d03f920
   Flutter: f04841e97a9d0b0a8025694d0796dd46242b2854
   native_crypto_ios: de03ec2f594e8d41bcba2341b7ad57fd926ada5d
+  SDWebImage: fd7e1a22f00303e058058278639bf6196ee431fe
+  SwiftyGif: 93a1cc87bf3a51916001cf8f3d63835fb64c819f
 
 PODFILE CHECKSUM: cc1f88378b4bfcf93a6ce00d2c587857c6008d3b
 

packages/native_crypto/example/ios/Runner/Info.plist

@@ -47,5 +47,9 @@
 	<true/>
 	<key>UIApplicationSupportsIndirectInputEvents</key>
 	<true/>
+	<key>UISupportsDocumentBrowser</key>
+	<true/>
+	<key>LSSupportsOpeningDocumentsInPlace</key>
+	<true/>
 </dict>
 </plist>

packages/native_crypto/example/lib/data/data_sources/native_crypto_data_source_impl.dart

@@ -4,6 +4,8 @@
 // license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
 
+import 'dart:io';
+
 import 'package:flutter/foundation.dart';
 import 'package:native_crypto/native_crypto.dart';
 import 'package:native_crypto_example/domain/data_sources/crypto_data_source.dart';
@@ -30,6 +32,29 @@ class NativeCryptoDataSourceImpl extends CryptoDataSource {
     return plainText;
   }
 
+  @override
+  Future<void> decryptFile(
+    File cipherText,
+    Uri folderResult,
+    SecretKey key,
+  ) async {
+    final AES cipher = AES(
+      key: key,
+      mode: AESMode.gcm,
+      padding: AESPadding.none,
+    );
+
+    final plainText = File.fromUri(
+      Uri.parse(
+        '${folderResult.path}/${cipherText.path.split('/').last.replaceAll('.enc', '')}',
+      ),
+    );
+    await cipher.decryptFile(
+      cipherText,
+      plainText,
+    );
+  }
+
   @override
   Future<SecretKey> deriveKeyFromPassword(
     String password, {
@@ -95,6 +120,27 @@ class NativeCryptoDataSourceImpl extends CryptoDataSource {
     return cipherText.bytes;
   }
 
+  @override
+  Future<void> encryptFile(
+    File plainText,
+    Uri folderResult,
+    SecretKey key,
+  ) async {
+    final AES cipher = AES(
+      key: key,
+      mode: AESMode.gcm,
+      padding: AESPadding.none,
+    );
+
+    final cipherText = File.fromUri(
+      Uri.parse(
+        '${folderResult.path}/${plainText.path.split('/').last}.enc',
+      ),
+    );
+
+    await cipher.encryptFile(plainText, cipherText);
+  }
+
   @override
   Future<SecretKey> generateSecureRandom(int length) async {
     final SecretKey sk = await SecretKey.fromSecureRandom(length);

packages/native_crypto/example/lib/data/data_sources/pointy_castle_data_source_impl.dart

@@ -6,6 +6,8 @@
 
 // ignore_for_file: implementation_imports
 
+import 'dart:io';
+
 import 'package:flutter/foundation.dart';
 import 'package:native_crypto/native_crypto.dart';
 import 'package:native_crypto_example/domain/data_sources/crypto_data_source.dart';
@@ -37,6 +39,15 @@ class PointyCastleDataSourceImpl extends CryptoDataSource {
     return paddedPlainText;
   }
 
+  @override
+  Future<void> decryptFile(
+    File cipherText,
+    Uri folderResult,
+    SecretKey key,
+  ) async {
+    throw UnimplementedError();
+  }
+
   @override
   Future<SecretKey> deriveKeyFromPassword(
     String password, {
@@ -125,7 +136,10 @@ class PointyCastleDataSourceImpl extends CryptoDataSource {
 
   @override
   Future<Uint8List> encryptWithIV(
-      Uint8List data, SecretKey key, Uint8List iv,) async {
+    Uint8List data,
+    SecretKey key,
+    Uint8List iv,
+  ) async {
     final gcm = GCMBlockCipher(AESEngine())
       ..init(
         true,
@@ -144,6 +158,15 @@ class PointyCastleDataSourceImpl extends CryptoDataSource {
     );
   }
 
+  @override
+  Future<void> encryptFile(
+    File plainText,
+    Uri folderResult,
+    SecretKey key,
+  ) async {
+    throw UnimplementedError();
+  }
+
   @override
   Future<SecretKey> generateSecureRandom(int length) async {
     if (_secureRandom == null) {

packages/native_crypto/example/lib/data/repositories/crypto_repository_impl.dart

@@ -4,6 +4,7 @@
 // license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
 
+import 'dart:io';
 import 'dart:typed_data';
 
 import 'package:native_crypto/native_crypto.dart';
@@ -30,6 +31,22 @@ class CryptoRepositoryImpl extends CryptoRepository {
         },
       );
 
+  @override
+  FutureOrResult<void> decryptFile(
+    File cipherText,
+    Uri folderResult,
+    SecretKey key,
+  ) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.decryptFile(cipherText, folderResult, key),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
   @override
   FutureOrResult<SecretKey> deriveKeyFromPassword(
     String password, {
@@ -86,7 +103,10 @@ class CryptoRepositoryImpl extends CryptoRepository {
 
   @override
   FutureOrResult<Uint8List> encryptWithIV(
-          Uint8List data, SecretKey key, Uint8List iv,) =>
+    Uint8List data,
+    SecretKey key,
+    Uint8List iv,
+  ) =>
       Result.tryCatchAsync(
         () async => cryptoDataSource.encryptWithIV(data, key, iv),
         (error) {
@@ -97,6 +117,22 @@ class CryptoRepositoryImpl extends CryptoRepository {
         },
       );
 
+  @override
+  FutureOrResult<void> encryptFile(
+    File plainText,
+    Uri folderResult,
+    SecretKey key,
+  ) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.encryptFile(plainText, folderResult, key),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
   @override
   FutureOrResult<SecretKey> generateSecureRandom(int length) =>
       Result.tryCatchAsync(

packages/native_crypto/example/lib/data/repositories/crypto_repository_switchable_impl.dart

@@ -0,0 +1,167 @@
+// Copyright 2019-2023 Hugo Pointcheval
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
+import 'dart:io';
+import 'dart:typed_data';
+
+import 'package:native_crypto/native_crypto.dart';
+import 'package:native_crypto_example/domain/data_sources/crypto_data_source.dart';
+import 'package:native_crypto_example/domain/entities/mode.dart';
+import 'package:native_crypto_example/domain/repositories/crypto_repository.dart';
+import 'package:wyatt_architecture/wyatt_architecture.dart';
+import 'package:wyatt_type_utils/wyatt_type_utils.dart';
+
+class CryptoRepositorySwitchableImpl extends CryptoRepository {
+  CryptoRepositorySwitchableImpl({
+    required this.nativeCryptoDataSource,
+    required this.pointyCastleDataSource,
+    required this.currentMode,
+  });
+
+  CryptoDataSource nativeCryptoDataSource;
+  CryptoDataSource pointyCastleDataSource;
+  Mode currentMode;
+
+  set mode(Mode mode) {
+    currentMode = mode;
+  }
+
+  CryptoDataSource get cryptoDataSource {
+    if (currentMode is NativeCryptoMode) {
+      return nativeCryptoDataSource;
+    } else if (currentMode is PointyCastleMode) {
+      return pointyCastleDataSource;
+    } else {
+      throw Exception('Unknown mode');
+    }
+  }
+
+  @override
+  FutureOrResult<Uint8List> decrypt(Uint8List data, SecretKey key) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.decrypt(data, key),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
+  @override
+  FutureOrResult<void> decryptFile(
+    File cipherText,
+    Uri folderResult,
+    SecretKey key,
+  ) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.decryptFile(cipherText, folderResult, key),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
+  @override
+  FutureOrResult<SecretKey> deriveKeyFromPassword(
+    String password, {
+    required String salt,
+  }) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.deriveKeyFromPassword(
+          password,
+          salt: salt,
+        ),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
+  @override
+  FutureOrResult<Uint8List> hash(Hash hasher, Uint8List data) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.hash(hasher, data),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
+  @override
+  FutureOrResult<Uint8List> hmac(Hmac hmac, Uint8List data, SecretKey key) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.hmac(hmac, data, key),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
+  @override
+  FutureOrResult<Uint8List> encrypt(Uint8List data, SecretKey key) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.encrypt(data, key),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
+  @override
+  FutureOrResult<Uint8List> encryptWithIV(
+    Uint8List data,
+    SecretKey key,
+    Uint8List iv,
+  ) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.encryptWithIV(data, key, iv),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
+  @override
+  FutureOrResult<void> encryptFile(
+    File plainText,
+    Uri folderResult,
+    SecretKey key,
+  ) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.encryptFile(plainText, folderResult, key),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+
+  @override
+  FutureOrResult<SecretKey> generateSecureRandom(int length) =>
+      Result.tryCatchAsync(
+        () async => cryptoDataSource.generateSecureRandom(length),
+        (error) {
+          if (error is NativeCryptoException) {
+            return ClientException('${error.message}');
+          }
+          return ClientException(error.toString());
+        },
+      );
+}

packages/native_crypto/example/lib/domain/data_sources/crypto_data_source.dart

@@ -4,6 +4,8 @@
 // license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
 
+import 'dart:io';
+
 import 'package:flutter/foundation.dart';
 import 'package:native_crypto/native_crypto.dart';
 import 'package:wyatt_architecture/wyatt_architecture.dart';
@@ -15,12 +17,22 @@ abstract class CryptoDataSource extends BaseDataSource {
     required String salt,
   });
   Future<Uint8List> encrypt(Uint8List data, SecretKey key);
+  Future<void> encryptFile(
+    File plainText,
+    Uri folderResult,
+    SecretKey key,
+  );
   Future<Uint8List> encryptWithIV(
     Uint8List data,
     SecretKey key,
     Uint8List iv,
   );
   Future<Uint8List> decrypt(Uint8List data, SecretKey key);
+  Future<void> decryptFile(
+    File cipherText,
+    Uri folderResult,
+    SecretKey key,
+  );
   Future<Uint8List> hash(Hash hasher, Uint8List data);
   Future<Uint8List> hmac(Hmac hmac, Uint8List data, SecretKey key);
 }

packages/native_crypto/example/lib/domain/repositories/crypto_repository.dart

@@ -4,6 +4,8 @@
 // license that can be found in the LICENSE file or at
 // https://opensource.org/licenses/MIT.
 
+import 'dart:io';
+
 import 'package:flutter/foundation.dart';
 import 'package:native_crypto/native_crypto.dart';
 import 'package:wyatt_architecture/wyatt_architecture.dart';
@@ -15,12 +17,22 @@ abstract class CryptoRepository extends BaseRepository {
     required String salt,
   });
   FutureOrResult<Uint8List> encrypt(Uint8List data, SecretKey key);
+  FutureOrResult<void> encryptFile(
+    File plainText,
+    Uri folderResult,
+    SecretKey key,
+  );
   FutureOrResult<Uint8List> encryptWithIV(
     Uint8List data,
     SecretKey key,
     Uint8List iv,
   );
   FutureOrResult<Uint8List> decrypt(Uint8List data, SecretKey key);
+  FutureOrResult<void> decryptFile(
+    File cipherText,
+    Uri folderResult,
+    SecretKey key,
+  );
 
   FutureOrResult<Uint8List> hash(Hash hasher, Uint8List data);
   FutureOrResult<Uint8List> hmac(Hmac hmac, Uint8List data, SecretKey key);

packages/native_crypto/example/lib/presentation/app/app.dart

@@ -8,9 +8,11 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:native_crypto_example/core/get_it.dart';
 import 'package:native_crypto_example/data/data_sources/native_crypto_data_source_impl.dart';
-import 'package:native_crypto_example/data/repositories/crypto_repository_impl.dart';
+import 'package:native_crypto_example/data/data_sources/pointy_castle_data_source_impl.dart';
+import 'package:native_crypto_example/data/repositories/crypto_repository_switchable_impl.dart';
 import 'package:native_crypto_example/data/repositories/logger_repository_impl.dart';
 import 'package:native_crypto_example/data/repositories/session_repository_impl.dart';
+import 'package:native_crypto_example/domain/entities/mode.dart';
 import 'package:native_crypto_example/domain/repositories/crypto_repository.dart';
 import 'package:native_crypto_example/domain/repositories/logger_repository.dart';
 import 'package:native_crypto_example/domain/repositories/session_repository.dart';
@@ -28,6 +30,12 @@ class App extends StatelessWidget {
   final SessionRepository _sessionRepository =
       SessionRepositoryImpl(sessionDataSource: getIt());
 
+  final CryptoRepository _cryptoRepository = CryptoRepositorySwitchableImpl(
+    nativeCryptoDataSource: getIt<NativeCryptoDataSourceImpl>(),
+    pointyCastleDataSource: getIt<PointyCastleDataSourceImpl>(),
+    currentMode: const NativeCryptoMode(),
+  );
+
   @override
   Widget build(BuildContext context) => MultiProvider(
         repositoryProviders: [
@@ -35,18 +43,17 @@ class App extends StatelessWidget {
           RepositoryProvider<SessionRepository>.value(
             value: _sessionRepository,
           ),
-          RepositoryProvider<CryptoRepository>(
-            create: (_) => CryptoRepositoryImpl(
-              cryptoDataSource: getIt<NativeCryptoDataSourceImpl>(),
-            ),
-          ),
+          RepositoryProvider<CryptoRepository>.value(value: _cryptoRepository),
         ],
         blocProviders: [
           BlocProvider<OutputCubit>(
             create: (_) => OutputCubit(_loggerRepository),
           ),
           BlocProvider<ModeSwitcherCubit>(
-            create: (_) => ModeSwitcherCubit(_sessionRepository),
+            create: (_) => ModeSwitcherCubit(
+              _sessionRepository,
+              _cryptoRepository,
+            ),
           )
         ],
         child: MaterialApp(

packages/native_crypto/example/lib/presentation/benchmark/blocs/benchmark_cubit.dart

@@ -0,0 +1,132 @@
+// Copyright 2019-2023 Hugo Pointcheval
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:native_crypto_example/domain/entities/log_message.dart';
+import 'package:native_crypto_example/domain/entities/states.dart';
+import 'package:native_crypto_example/domain/repositories/crypto_repository.dart';
+import 'package:native_crypto_example/domain/repositories/logger_repository.dart';
+import 'package:native_crypto_example/domain/repositories/session_repository.dart';
+
+part 'benchmark_state.dart';
+
+class BenchmarkCubit extends Cubit<BenchmarkState> {
+  BenchmarkCubit({
+    required this.sessionRepository,
+    required this.loggerRepository,
+    required this.cryptoRepository,
+  }) : super(const BenchmarkState.initial());
+  final SessionRepository sessionRepository;
+  final LoggerRepository loggerRepository;
+  final CryptoRepository cryptoRepository;
+
+  List<int> testedSizes = [
+    2097152,
+    6291456,
+    10485760,
+    14680064,
+    18874368,
+    23068672,
+    27262976,
+    31457280,
+    35651584,
+    39845888,
+    44040192,
+    48234496,
+    52428800,
+  ];
+
+  FutureOr<void> launchBenchmark() async {
+    emit(const BenchmarkState.loading());
+
+    final sk = await sessionRepository.getSessionKey();
+
+    if (sk.isErr) {
+      await loggerRepository.addLog(
+        const LogError('No SecretKey!\n'
+            'Go in Key tab and generate or derive one.'),
+      );
+      emit(
+        BenchmarkState.failure(
+          sk.err?.message,
+        ),
+      );
+    }
+
+    int run = 0;
+    final csv = StringBuffer(
+      'Run;Size (B);Encryption Time (ms);Decryption Time (ms)\n',
+    );
+    for (final size in testedSizes) {
+      run++;
+      final StringBuffer csvLine = StringBuffer();
+      final dummyBytes = Uint8List(size);
+      csvLine.write('$run;$size;');
+
+      // Encryption
+      final beforeEncryption = DateTime.now();
+
+      final encryptedBigFileResult = await cryptoRepository.encrypt(
+        dummyBytes,
+        sk.ok!,
+      );
+
+      final afterEncryption = DateTime.now();
+
+      final benchmarkEncryption = afterEncryption.millisecondsSinceEpoch -
+          beforeEncryption.millisecondsSinceEpoch;
+
+      await loggerRepository.addLog(
+        LogInfo(
+          '[Benchmark] ${size ~/ 1000000}MB => Encryption took $benchmarkEncryption ms',
+        ),
+      );
+
+      csvLine.write('$benchmarkEncryption');
+
+      if (encryptedBigFileResult.isErr) {
+        await loggerRepository.addLog(
+          LogError(
+            'Encryption failed: ${encryptedBigFileResult.err?.message}',
+          ),
+        );
+        emit(
+          BenchmarkState.failure(
+            encryptedBigFileResult.err?.message,
+          ),
+        );
+        return;
+      }
+
+      // Decryption
+      final beforeDecryption = DateTime.now();
+      await cryptoRepository.decrypt(
+        encryptedBigFileResult.ok!,
+        sk.ok!,
+      );
+      final afterDecryption = DateTime.now();
+      final benchmarkDecryption = afterDecryption.millisecondsSinceEpoch -
+          beforeDecryption.millisecondsSinceEpoch;
+      await loggerRepository.addLog(
+        LogInfo(
+          '[Benchmark] ${size ~/ 1000000}MB => Decryption took $benchmarkDecryption ms',
+        ),
+      );
+
+      csvLine.write(';$benchmarkDecryption');
+      csv.writeln(csvLine);
+    }
+    debugPrint(csv.toString());
+    emit(
+      const BenchmarkState.success(),
+    );
+
+    return;
+  }
+}

packages/native_crypto/example/lib/presentation/benchmark/blocs/benchmark_state.dart

@@ -0,0 +1,27 @@
+// Copyright 2019-2023 Hugo Pointcheval
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
+part of 'benchmark_cubit.dart';
+
+@immutable
+class BenchmarkState {
+  const BenchmarkState.initial()
+      : state = State.initial,
+        error = null;
+
+  const BenchmarkState.loading()
+      : state = State.loading,
+        error = null;
+
+  const BenchmarkState.failure(this.error) : state = State.failure;
+
+  const BenchmarkState.success()
+      : state = State.success,
+        error = null;
+
+  final State state;
+  final String? error;
+}

packages/native_crypto/example/lib/presentation/benchmark/state_management/benchmark_state_management.dart

@@ -0,0 +1,55 @@
+// Copyright 2019-2023 Hugo Pointcheval
+//
+// Use of this source code is governed by an MIT-style
+// license that can be found in the LICENSE file or at
+// https://opensource.org/licenses/MIT.
+
+import 'package:flutter/material.dart';
+import 'package:native_crypto_example/core/typography.dart';
+import 'package:native_crypto_example/domain/repositories/crypto_repository.dart';
+import 'package:native_crypto_example/domain/repositories/logger_repository.dart';
+import 'package:native_crypto_example/domain/repositories/session_repository.dart';
+import 'package:native_crypto_example/presentation/benchmark/blocs/benchmark_cubit.dart';
+import 'package:native_crypto_example/presentation/home/state_management/widgets/button_state_management.dart';
+import 'package:native_crypto_example/presentation/output/widgets/logs.dart';
+import 'package:wyatt_bloc_helper/wyatt_bloc_helper.dart';
+
+class BenchmarkStateManagement
+    extends CubitScreen<BenchmarkCubit, BenchmarkState> {
+  const BenchmarkStateManagement({super.key});
+
+  @override
+  BenchmarkCubit create(BuildContext context) => BenchmarkCubit(
+        sessionRepository: repo<SessionRepository>(context),
+        loggerRepository: repo<LoggerRepository>(context),
+        cryptoRepository: repo<CryptoRepository>(context),
+      );
+
+  @override
+  Widget onBuild(BuildContext context, BenchmarkState state) => ListView(
+        children: [
+          const Logs(),
+          const Padding(
+            padding: EdgeInsets.all(8),
+            child: Text(
+              'Benchmark',
+              style: AppTypography.title,
+            ),
+          ),
+          const Padding(
+            padding: EdgeInsets.all(8),
+            child: Text(
+              '''In computer science, a benchmark is a standardized way to measure the performance of a software program or hardware device. A benchmark is typically a set of tests or tasks designed to measure how quickly a program can complete a given set of operations or how efficiently a hardware device can perform a specific task.''',
+              style: AppTypography.body,
+            ),
+          ),
+          Padding(
+            padding: const EdgeInsets.all(8),
+            child: ButtonStateManagement(
+              label: 'Launch',
+              onPressed: () => bloc(context).launchBenchmark(),
+            ),
+          ),
+        ],
+      );
+}

packages/native_crypto/example/lib/presentation/cipher/blocs/aes/aes_cubit.dart

@@ -5,7 +5,9 @@
 // https://opensource.org/licenses/MIT.
 
 import 'dart:async';
+import 'dart:io';
 
+import 'package:file_picker/file_picker.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:native_crypto/native_crypto.dart';
@@ -232,4 +234,184 @@ class AESCubit extends Cubit<AESState> {
 
     return;
   }
+
+  FutureOr<void> encryptFile() async {
+    emit(state.copyWith(state: State.loading));
+
+    final sk = await sessionRepository.getSessionKey();
+
+    if (sk.isErr) {
+      await loggerRepository.addLog(
+        const LogError('No SecretKey!\n'
+            'Go in Key tab and generate or derive one.'),
+      );
+      emit(
+        state.copyWith(
+          state: State.failure,
+          error: sk.err?.message,
+        ),
+      );
+
+      return;
+    }
+
+    // Pick file to encrypt
+    final pickFileResult = await FilePicker.platform.pickFiles();
+
+    if (pickFileResult == null) {
+      await loggerRepository.addLog(
+        const LogError('No file selected.'),
+      );
+      emit(
+        state.copyWith(
+          state: State.failure,
+          error: 'No file selected.',
+        ),
+      );
+
+      return;
+    }
+
+    final file = File(pickFileResult.files.single.path!);
+
+    // Pick folder to store the encrypted file
+    final resultFolder = await FilePicker.platform.getDirectoryPath();
+
+    if (resultFolder == null) {
+      await loggerRepository.addLog(
+        const LogError('No folder selected.'),
+      );
+      emit(
+        state.copyWith(
+          state: State.failure,
+          error: 'No folder selected.',
+        ),
+      );
+
+      return;
+    }
+
+    final folder = Directory(resultFolder);
+
+    final encryption = await cryptoRepository.encryptFile(
+      file,
+      folder.uri,
+      sk.ok!,
+    );
+
+    emit(
+      await encryption.foldAsync(
+        (_) async {
+          await loggerRepository.addLog(
+            const LogInfo('File successfully encrypted.\n'),
+          );
+          return state.copyWith(
+            state: State.success,
+            plainTextFile: '',
+            cipherTextFile: '',
+          );
+        },
+        (error) async {
+          await loggerRepository.addLog(
+            LogError(error.message ?? 'Error during encryption.'),
+          );
+          return state.copyWith(
+            state: State.failure,
+            error: error.message,
+          );
+        },
+      ),
+    );
+
+    return;
+  }
+
+  FutureOr<void> decryptFile() async {
+    emit(state.copyWith(state: State.loading));
+
+    final sk = await sessionRepository.getSessionKey();
+
+    if (sk.isErr) {
+      await loggerRepository.addLog(
+        const LogError('No SecretKey!\n'
+            'Go in Key tab and generate or derive one.'),
+      );
+      emit(
+        state.copyWith(
+          state: State.failure,
+          error: sk.err?.message,
+        ),
+      );
+
+      return;
+    }
+
+    await FilePicker.platform.clearTemporaryFiles();
+
+    final resultPickFile = await FilePicker.platform.pickFiles();
+
+    if (resultPickFile == null) {
+      await loggerRepository.addLog(
+        const LogError('No file selected.'),
+      );
+      emit(
+        state.copyWith(
+          state: State.failure,
+          error: 'No file selected.',
+        ),
+      );
+
+      return;
+    }
+
+    final file = File(resultPickFile.files.single.path!);
+
+    // Pick folder to store the encrypted file
+    final resultFolder = await FilePicker.platform.getDirectoryPath();
+
+    if (resultFolder == null) {
+      await loggerRepository.addLog(
+        const LogError('No folder selected.'),
+      );
+      emit(
+        state.copyWith(
+          state: State.failure,
+          error: 'No folder selected.',
+        ),
+      );
+
+      return;
+    }
+
+    final folder = Directory(resultFolder);
+
+    final decryption =
+        await cryptoRepository.decryptFile(file, folder.uri, sk.ok!);
+
+    emit(
+      await decryption.foldAsync(
+        (_) async {
+          await loggerRepository.addLog(
+            const LogInfo('File successfully decrypted.\n'),
+          );
+          return state.copyWith(
+            state: State.success,
+            plainTextFile: '',
+            cipherTextFile: '',
+          );
+        },
+        (error) async {
+          await loggerRepository.addLog(
+            LogError(error.message ?? 'Error during decryption.'),
+          );
+          return state.copyWith(
+            state: State.failure,
+            error: error.message,
+          );
+        },
+      ),
+    );
+
+    return;
+  }
 }

packages/native_crypto/example/lib/presentation/cipher/state_management/aes_state_management.dart

@@ -79,6 +79,27 @@ class AESStateManagement extends CubitScreen<AESCubit, AESState> {
               onPressed: () => bloc(context).decryptFromMemory(),
             ),
           ),
+          const Padding(
+            padding: EdgeInsets.all(8),
+            child: Text(
+              'File',
+              style: AppTypography.title,
+            ),
+          ),
+          Padding(
+            padding: const EdgeInsets.all(8),
+            child: ButtonStateManagement(
+              label: 'Encrypt file',
+              onPressed: () => bloc(context).encryptFile(),
+            ),
+          ),
+          Padding(
+            padding: const EdgeInsets.all(8),
+            child: ButtonStateManagement(
+              label: 'Decrypt file',
+              onPressed: () => bloc(context).decryptFile(),
+            ),
+          ),
           const Padding(
             padding: EdgeInsets.all(8),
             child: Text(

packages/native_crypto/example/lib/presentation/home/blocs/mode_switcher/mode_switcher_cubit.dart

@@ -8,7 +8,9 @@ import 'dart:async';
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:native_crypto_example/data/repositories/crypto_repository_switchable_impl.dart';
 import 'package:native_crypto_example/domain/entities/mode.dart';
+import 'package:native_crypto_example/domain/repositories/crypto_repository.dart';
 import 'package:native_crypto_example/domain/repositories/session_repository.dart';
 
 part 'mode_switcher_state.dart';
@@ -16,8 +18,11 @@ part 'mode_switcher_state.dart';
 class ModeSwitcherCubit extends Cubit<ModeSwitcherState> {
   ModeSwitcherCubit(
     this.sessionRepository,
+    this.cryptoRepository,
   ) : super(const ModeSwitcherState(NativeCryptoMode()));
+
   SessionRepository sessionRepository;
+  CryptoRepository cryptoRepository;
 
   FutureOr<void> switchMode() async {
     final currentMode = await sessionRepository.getCurrentMode();
@@ -31,9 +36,16 @@ class ModeSwitcherCubit extends Cubit<ModeSwitcherState> {
       }
 
       sessionRepository.setCurrentMode(newMode);
+      if (cryptoRepository is CryptoRepositorySwitchableImpl) {
+        (cryptoRepository as CryptoRepositorySwitchableImpl).mode = newMode;
+      }
     } else {
       newMode = const NativeCryptoMode();
       sessionRepository.setCurrentMode(newMode);
+
+      if (cryptoRepository is CryptoRepositorySwitchableImpl) {
+        (cryptoRepository as CryptoRepositorySwitchableImpl).mode = newMode;
+      }
     }
 
     emit(ModeSwitcherState(newMode));

packages/native_crypto/example/lib/presentation/home/state_management/home_state_management.dart

@@ -5,12 +5,12 @@
 // https://opensource.org/licenses/MIT.
 
 import 'package:flutter/material.dart';
+import 'package:native_crypto_example/presentation/benchmark/state_management/benchmark_state_management.dart';
 import 'package:native_crypto_example/presentation/cipher/state_management/aes_state_management.dart';
 import 'package:native_crypto_example/presentation/hash/state_management/hash_state_management.dart';
 import 'package:native_crypto_example/presentation/home/blocs/navigation_bar/navigation_bar_cubit.dart';
 import 'package:native_crypto_example/presentation/home/state_management/widgets/app_bar_state_management.dart';
 import 'package:native_crypto_example/presentation/home/state_management/widgets/bottom_navigation_bar_state_management.dart';
-import 'package:native_crypto_example/presentation/home/widgets/blank.dart';
 import 'package:native_crypto_example/presentation/kdf/state_management/key_derivation_state_management.dart';
 import 'package:native_crypto_example/presentation/test_vectors/state_management/test_vectors_state_management.dart';
 import 'package:wyatt_bloc_helper/wyatt_bloc_helper.dart';
@@ -24,7 +24,7 @@ class HomeStateManagement
     HashStateManagement(),
     AESStateManagement(),
     TestVectorsStateManagement(),
-    const Blank()
+    const BenchmarkStateManagement(),
   ];
 
   @override

packages/native_crypto/example/lib/presentation/home/state_management/widgets/app_bar_state_management.dart

@@ -22,12 +22,12 @@ class AppBarStateManagement
               : 'PointyCastle',
         ),
         backgroundColor: state.currentMode.primaryColor,
-        // TODO(hpcl): enable mode switcher
-        // actions: [
-        //   Switch(
-        //     value: state.currentMode == const NativeCryptoMode(),
-        //     onChanged: (_) => bloc(context).switchMode(),
-        //   )
-        // ],
+        actions: [
+          Switch(
+            activeColor: Colors.white,
+            value: state.currentMode == const NativeCryptoMode(),
+            onChanged: (_) => bloc(context).switchMode(),
+          )
+        ],
       );
 }

packages/native_crypto/example/pubspec.yaml

@@ -32,6 +32,7 @@ dependencies:
     hosted: https://git.wyatt-studio.fr/api/packages/Wyatt-FOSS/pub/
     version: 2.0.0
   get_it: ^7.2.0
+  file_picker: ^5.2.7
 
 dev_dependencies:
   flutter_test: { sdk: flutter }

packages/native_crypto/lib/src/core/enums/encoding.dart

@@ -8,10 +8,13 @@
 enum Encoding {
   /// UTF-8 encoding, as defined by the Unicode standard.
   utf8,
+
   /// UTF-16 encoding, as defined by the Unicode standard.
   utf16,
+
   /// Base64 encoding, as defined by RFC 4648.
   base64,
+
   /// Hexadecimal encoding.
   base16,
 }

packages/native_crypto/lib/src/core/enums/hash_algorithm.dart

@@ -8,8 +8,10 @@
 enum HashAlgorithm {
   /// The SHA-256 hash algorithm.
   sha256,
+
   /// The SHA-384 hash algorithm.
   sha384,
+
   /// The SHA-512 hash algorithm.
   sha512,
 }

packages/native_crypto/lib/src/domain/cipher.dart

@@ -16,6 +16,7 @@ import 'package:native_crypto/src/domain/cipher_chunk.dart';
 abstract class Cipher<T extends CipherChunk> {
   /// {@macro cipher}
   const Cipher();
+
   /// Encrypts a [Uint8List] and returns a [CipherText].
   Future<CipherText<T>> encrypt(Uint8List plainText);
 

packages/native_crypto/test/mocks/mock_native_crypto_api.dart

@@ -215,13 +215,15 @@ class MockNativeCryptoAPI implements NativeCryptoAPI {
     HashAlgorithm argAlgorithm,
   ) {
     if (pbkdf2Fn != null) {
-      return Future.value(pbkdf2Fn!(
+      return Future.value(
+        pbkdf2Fn!(
           argPassword,
           argSalt,
           argIterations,
           argLength,
           argAlgorithm.toString(),
-      ),);
+        ),
+      );
     } else {
       return Future.value(Uint8List.fromList([1, 2, 3]));
     }

packages/native_crypto_android/LICENSE

@@ -2,7 +2,7 @@ NativeCrypto - Android Implementation
 
 MIT License
 
-Copyright (c) 2019 - 2022 Hugo Pointcheval
+Copyright (c) 2019 - 2023 Hugo Pointcheval
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

packages/native_crypto_android/README.md

@@ -1,15 +1,13 @@
-# native_crypto_android
+# NativeCrypto - Android Implementation
 
-A new flutter plugin project.
+Android Implementation of [NativeCrypto][1] Plugin.
 
 ## Getting Started
 
-This project is a starting point for a Flutter
-[plug-in package](https://flutter.dev/developing-packages/),
-a specialized package that includes platform-specific implementation code for
-Android and/or iOS.
+This project is a starting point for a Flutter [plug-in package][2], a specialized package that includes platform-specific implementation code for Android and/or iOS.
 
-For help getting started with Flutter, view our
-[online documentation](https://flutter.dev/docs), which offers tutorials,
-samples, guidance on mobile development, and a full API reference.
+For help getting started with Flutter, view our [online documentation][3], which offers tutorials, samples, guidance on mobile development, and a full API reference.
 
+[1]: ../../README.md
+[2]: https://flutter.dev/developing-packages/
+[3]: https://flutter.dev/docs

packages/native_crypto_android/android/src/main/kotlin/fr/pointcheval/native_crypto_android/NativeCrypto.kt

@@ -111,7 +111,7 @@ class NativeCrypto(private val context: Context) : NativeCryptoAPI {
     ): Boolean {
         // For now, only AES is supported
         val aes = AES()
-        val params = FileParameters(context, plainTextPath, cipherTextPath)
+        val params = FileParameters(context, cipherTextPath, plainTextPath)
 
         return aes.decryptFile(params, key)
     }

packages/native_crypto_android/android/src/main/kotlin/fr/pointcheval/native_crypto_android/ciphers/AES.kt

@@ -2,6 +2,9 @@ package fr.pointcheval.native_crypto_android.ciphers
 
 import fr.pointcheval.native_crypto_android.interfaces.Cipher
 import fr.pointcheval.native_crypto_android.utils.FileParameters
+import java.io.BufferedInputStream
+import java.io.BufferedOutputStream
+import javax.crypto.CipherInputStream
 import javax.crypto.CipherOutputStream
 import javax.crypto.spec.GCMParameterSpec
 import javax.crypto.spec.SecretKeySpec
@@ -60,28 +63,32 @@ class AES : Cipher {
             cipherInstance!!.init(javax.crypto.Cipher.ENCRYPT_MODE, sk)
         }
 
-        var len: Int?
-        val buffer = ByteArray(8192)
-        val inputFile = fileParameters.getFileInputStream()
-        val outputFile = fileParameters.getFileOutputStream()
-        val iv: ByteArray? = cipherInstance!!.iv
+        val input = BufferedInputStream(fileParameters.getFileInputStream())
 
-        outputFile?.write(iv)
-        outputFile?.flush()
+        var outputBuffered = BufferedOutputStream(fileParameters.getFileOutputStream(false))
+        val iv: ByteArray = cipherInstance!!.iv
+
+        // Prepend the IV to the cipherText file
+        outputBuffered.write(iv)
+        outputBuffered.flush()
+        outputBuffered.close()
+
+        // Reopen the file and append the cipherText
+        outputBuffered = BufferedOutputStream(fileParameters.getFileOutputStream(true))
+        val output = CipherOutputStream(outputBuffered, cipherInstance)
+
+        var i: Int
+        do {
+            i = input.read()
+            if (i != -1) output.write(i)
+        } while (i != -1)
+
+        output.flush()
+        output.close()
+
+        input.close()
+        outputBuffered.close()
 
-        val encryptedStream = CipherOutputStream(outputFile!!, cipherInstance)
-        while(true) {
-            len = inputFile?.read(buffer)
-            if (len != null && len > 0) {
-                encryptedStream.write(buffer,0,len)
-            } else {
-                break
-            }
-        }
-        encryptedStream.flush()
-        encryptedStream.close()
-        inputFile?.close()
-        outputFile.close()
 
         return fileParameters.outputExists()
     }
@@ -110,9 +117,7 @@ class AES : Cipher {
         val inputFile = fileParameters.getFileInputStream() ?: throw Exception("Error while reading IV")
 
         // Read the first 12 bytes from the file
-        for (i in 0 until 12) {
-            iv[i] = inputFile.read().toByte()
-        }
+        inputFile.read(iv)
 
         // Initialize secret key spec
         val sk = SecretKeySpec(key, "AES")
@@ -125,21 +130,19 @@ class AES : Cipher {
 
         cipherInstance!!.init(javax.crypto.Cipher.DECRYPT_MODE, sk, gcmParameterSpec)
 
-        var len: Int?
-        val buffer = ByteArray(8192)
-        val outputFile = fileParameters.getFileOutputStream()
-        val decryptedStream = CipherOutputStream(outputFile!!, cipherInstance)
-        while (true) {
-            len = inputFile.read(buffer)
-            if(len > 0){
-                decryptedStream.write(buffer,0, len)
-            } else {
-                break
-            }
-        }
-        decryptedStream.flush()
-        decryptedStream.close()
-        inputFile.close()
+        val input = CipherInputStream(BufferedInputStream(inputFile), cipherInstance)
+        val output = BufferedOutputStream(fileParameters.getFileOutputStream(false))
+
+        var i: Int
+        do {
+            i = input.read()
+            if (i != -1) output.write(i)
+        } while (i != -1)
+
+        output.flush()
+        output.close()
+
+        input.close()
 
         return fileParameters.outputExists()
     }

packages/native_crypto_android/android/src/main/kotlin/fr/pointcheval/native_crypto_android/utils/FileParameters.kt

@@ -43,14 +43,15 @@ class FileParameters(ctx: Context, input: String, output: String) {
         }
     }
 
-    fun getFileOutputStream(): OutputStream? {
+    fun getFileOutputStream(append: Boolean): OutputStream? {
         val path = outputPath
         return try{
-            FileOutputStream(path)
+            FileOutputStream(path, append)
         } catch(e: IOException){
             val documentFile: DocumentFile = this.getDocumentFileByPath(path)
             val documentUri = documentFile.uri
-            context.contentResolver.openOutputStream(documentUri)
+            val mode = if(append) "wa" else "w"
+            context.contentResolver.openOutputStream(documentUri, mode)
         }
     }
 

packages/native_crypto_ios/LICENSE

@@ -2,7 +2,7 @@ NativeCrypto - iOS Implementation
 
 MIT License
 
-Copyright (c) 2019 - 2022 Hugo Pointcheval
+Copyright (c) 2019 - 2023 Hugo Pointcheval
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

packages/native_crypto_ios/README.md

@@ -1,15 +1,13 @@
 # NativeCrypto - iOS Implementation
 
-iOS Implementation of NativeCrypto Plugin.
+iOS Implementation of [NativeCrypto][1] Plugin.
 
 ## Getting Started
 
-This project is a starting point for a Flutter
-[plug-in package](https://flutter.dev/developing-packages/),
-a specialized package that includes platform-specific implementation code for
-Android and/or iOS.
+This project is a starting point for a Flutter [plug-in package][2], a specialized package that includes platform-specific implementation code for Android and/or iOS.
 
-For help getting started with Flutter, view our
-[online documentation](https://flutter.dev/docs), which offers tutorials,
-samples, guidance on mobile development, and a full API reference.
+For help getting started with Flutter, view our [online documentation][3], which offers tutorials, samples, guidance on mobile development, and a full API reference.
 
+[1]: ../../README.md
+[2]: https://flutter.dev/developing-packages/
+[3]: https://flutter.dev/docs

packages/native_crypto_ios/ios/Classes/NativeCrypto.swift

@@ -25,7 +25,6 @@ public class NativeCrypto: NSObject, NativeCryptoAPI {
         case .sha256: return FlutterStandardTypedData(bytes: Data(HMAC<SHA256>(key: symmetricKey).finalize()))
         case .sha384: return FlutterStandardTypedData(bytes: Data(HMAC<SHA384>(key: symmetricKey).finalize()))
         case .sha512: return FlutterStandardTypedData(bytes: Data(HMAC<SHA512>(key: symmetricKey).finalize()))
-        @unknown default: fatalError("Unknown algorithm")
         }
     }
     

packages/native_crypto_ios/ios/Classes/utils/HashAlgorithmParser.swift

@@ -15,7 +15,6 @@ public class HashAlgorithmParser {
         case .sha256: return SHA256.init()
         case .sha384: return SHA384.init()
         case .sha512: return SHA512.init()
-        @unknown default: fatalError("Unknown algorithm")
         }
     }
     
@@ -24,7 +23,6 @@ public class HashAlgorithmParser {
         case .sha256: return CCPBKDFAlgorithm(kCCPRFHmacAlgSHA256)
         case .sha384: return CCPBKDFAlgorithm(kCCPRFHmacAlgSHA384)
         case .sha512: return CCPBKDFAlgorithm(kCCPRFHmacAlgSHA512)
-        @unknown default: fatalError("Unknown algorithm")
         }
     }
 

packages/native_crypto_ios/ios/Classes/utils/Task.swift

@@ -1,45 +0,0 @@
-import Foundation
-
-class Task<T> {
-    
-    var task: () throws -> T
-    private var successful: Bool = false
-    private var result: T? = nil
-    private var exception: Error? = nil
-    
-    init(task: @escaping () throws -> T) {
-        self.task = task
-    }
-    
-    func isSuccessful() -> Bool {
-        return successful
-    }
-    
-    func getResult() -> T? {
-        return result
-    }
-    
-    func getException() -> Error {
-        if (exception != nil) {
-            return exception!
-        } else {
-            return NativeCryptoError.unknownError()
-        }
-    }
-    
-    func call() {
-        do {
-            result = try task()
-            exception = nil
-            successful = true
-        } catch {
-            exception = error
-            result = nil
-            successful = false
-        }
-    }
-    
-    func finalize(callback: (_ task: Task<T>) -> Void) {
-        callback(self)
-    }
-}

packages/native_crypto_platform_interface/README.md

@@ -1,12 +1,12 @@
 # NativeCrypto - Platform Interface
 
-A common platform interface for the [`native_crypto`][1] plugin.
+A common platform interface for the [NativeCrypto][1] plugin.
 
 This interface allows platform-specific implementations of the `native_crypto` plugin, as well as the plugin itself, to ensure they are supporting the same interface.
 
 ## Usage
 
-To implement a new platform-specific implementation of `native_crypto`, extend [`NativeCryptoPlatform`][2] with an implementation that performs the platform-specific behavior, and when you register your plugin, set the default `NativeCryptoPlatform` by calling `NativeCryptoPlatform.instance = MyNativeCryptoPlatform()`.
+To implement a new platform-specific implementation of `native_crypto`, extend [`NativeCryptoPlatform`][1] with an implementation that performs the platform-specific behavior, and when you register your plugin, set the default `NativeCryptoPlatform` by calling `NativeCryptoPlatform.instance = MyNativeCryptoPlatform()`.
 
 ## Pigeon
 
@@ -16,5 +16,5 @@ Run generator with `flutter pub run pigeon --input pigeons/messages.dart`.
 
 > Note: Make sure the `lib/src/gen` folder exists before running the generator.
 
-[1]: ../native_crypto
+[1]: ../../README.md
 [2]: lib/native_crypto_platform_interface.dart