129 lines
4.1 KiB
Dart
129 lines
4.1 KiB
Dart
import 'dart:typed_data';
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import 'dart:io' as io;
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import 'package:aes_crypt/aes_crypt.dart';
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import 'package:computer/computer.dart';
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import 'package:encrypt/encrypt.dart';
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import 'dart:convert';
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import 'package:photos/core/configuration.dart';
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import 'package:steel_crypt/steel_crypt.dart' as steel;
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import 'package:uuid/uuid.dart';
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class CryptoUtil {
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static Uint8List getSecureRandomBytes({int length = 32}) {
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return SecureRandom(length).bytes;
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}
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static Uint8List scrypt(Uint8List plainText, Uint8List salt) {
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return steel.PassCrypt.scrypt()
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.hashBytes(salt: salt, input: plainText, len: 32);
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}
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static Uint8List aesEncrypt(
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Uint8List plainText, Uint8List key, Uint8List iv) {
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final encrypter = AES(Key(key), mode: AESMode.cbc);
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return encrypter
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.encrypt(
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plainText,
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iv: IV(iv),
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)
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.bytes;
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}
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static String decryptFromBase64(
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String base64CipherText, String base64Key, String base64IV) {
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final encrypter = AES(Key.fromBase64(base64Key), mode: AESMode.cbc);
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return utf8.decode(encrypter.decrypt(
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Encrypted.fromBase64(base64CipherText),
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iv: IV.fromBase64(base64IV),
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));
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}
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static Future<String> encryptFileToFile(
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String sourcePath, String destinationPath, String key) async {
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final args = Map<String, String>();
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args["key"] = key;
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args["source"] = sourcePath;
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args["destination"] = destinationPath;
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return Computer().compute(runEncryptFileToFile, param: args);
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}
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static Future<String> encryptDataToFile(
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Uint8List source, String destinationPath, String base64EncodedKey) async {
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final args = Map<String, dynamic>();
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args["key"] = base64EncodedKey;
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args["source"] = source;
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args["destination"] = destinationPath;
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return Computer().compute(runEncryptDataToFile, param: args);
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}
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static Future<String> encryptDataToData(
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Uint8List source, String base64EncodedKey) async {
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final destinationPath =
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Configuration.instance.getTempDirectory() + Uuid().v4();
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return encryptDataToFile(source, destinationPath, base64EncodedKey)
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.then((value) {
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final file = io.File(destinationPath);
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final data = file.readAsBytesSync();
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file.deleteSync();
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return base64.encode(data);
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});
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}
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static Future<void> decryptFileToFile(String sourcePath,
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String destinationPath, String base64EncodedKey) async {
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final args = Map<String, String>();
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args["key"] = base64EncodedKey;
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args["source"] = sourcePath;
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args["destination"] = destinationPath;
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return Computer().compute(runDecryptFileToFile, param: args);
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}
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static Future<Uint8List> decryptFileToData(
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String sourcePath, String base64EncodedKey) {
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final args = Map<String, String>();
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args["key"] = base64EncodedKey;
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args["source"] = sourcePath;
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return Computer().compute(runDecryptFileToData, param: args);
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}
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static Future<Uint8List> decryptDataToData(
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Uint8List source, String base64EncodedKey) {
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final sourcePath = Configuration.instance.getTempDirectory() + Uuid().v4();
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final file = io.File(sourcePath);
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file.writeAsBytesSync(source);
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return decryptFileToData(sourcePath, base64EncodedKey).then((value) {
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file.deleteSync();
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return value;
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});
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}
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}
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Future<String> runEncryptFileToFile(Map<String, String> args) {
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final encrypter = getEncrypter(args["key"]);
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return encrypter.encryptFile(args["source"], args["destination"]);
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}
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Future<String> runEncryptDataToFile(Map<String, dynamic> args) {
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final encrypter = getEncrypter(args["key"]);
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return encrypter.encryptDataToFile(args["source"], args["destination"]);
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}
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Future<String> runDecryptFileToFile(Map<String, dynamic> args) async {
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final encrypter = getEncrypter(args["key"]);
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return encrypter.decryptFile(args["source"], args["destination"]);
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}
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Future<Uint8List> runDecryptFileToData(Map<String, dynamic> args) async {
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final encrypter = getEncrypter(args["key"]);
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return encrypter.decryptDataFromFile(args["source"]);
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}
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AesCrypt getEncrypter(String key) {
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final encrypter = AesCrypt(key);
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encrypter.aesSetMode(AesMode.cbc);
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encrypter.setOverwriteMode(AesCryptOwMode.on);
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return encrypter;
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}
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