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<feat: New project structure>

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<feat: New release>
This commit is contained in:
Alessandro Autiero
2023-09-02 15:34:15 +02:00
parent 64b33102f4
commit b41e22adeb
953 changed files with 1373072 additions and 0 deletions
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52
gui/lib/src/util/cryptography.dart Normal file
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import 'dart:math';
import 'dart:typed_data';
import 'package:bcrypt/bcrypt.dart';
import 'package:pointycastle/export.dart';
import 'dart:convert';
const int _ivLength = 16;
const int _keyLength = 32;
String hashPassword(String plaintext) => BCrypt.hashpw(plaintext, BCrypt.gensalt());
bool checkPassword(String password, String hashedText) => BCrypt.checkpw(password, hashedText);
String aes256Encrypt(String plainText, String password) {
final random = Random.secure();
final iv = Uint8List.fromList(List.generate(_ivLength, (index) => random.nextInt(256)));
final keyDerivationData = Uint8List.fromList(utf8.encode(password));
final derive = PBKDF2KeyDerivator(HMac(SHA256Digest(), _ivLength * 8));
var params = Pbkdf2Parameters(iv, _ivLength * 8, _keyLength);
derive.init(params);
final key = derive.process(keyDerivationData);
final cipherParams = PaddedBlockCipherParameters(
KeyParameter(key),
null,
);
final aes = AESEngine();
final paddingCipher = PaddedBlockCipherImpl(PKCS7Padding(), aes);
paddingCipher.init(true, cipherParams);
final plainBytes = Uint8List.fromList(utf8.encode(plainText));
final encryptedBytes = paddingCipher.process(plainBytes);
return base64.encode([...iv, ...encryptedBytes]);
}
String aes256Decrypt(String encryptedText, String password) {
final encryptedBytes = base64.decode(encryptedText);
final salt = encryptedBytes.sublist(0, _ivLength);
final payload = encryptedBytes.sublist(_ivLength);
final keyDerivationData = Uint8List.fromList(utf8.encode(password));
final derive = PBKDF2KeyDerivator(HMac(SHA256Digest(), _ivLength * 8));
var params = Pbkdf2Parameters(salt, _ivLength * 8, _keyLength);
derive.init(params);
final key = derive.process(keyDerivationData);
final cipherParams = PaddedBlockCipherParameters(
KeyParameter(key),
null,
);
final aes = AESEngine();
final paddingCipher = PaddedBlockCipherImpl(PKCS7Padding(), aes);
paddingCipher.init(false, cipherParams);
final decryptedBytes = paddingCipher.process(payload);
return utf8.decode(decryptedBytes);
}