97 lines
3 KiB
Dart
97 lines
3 KiB
Dart
import 'dart:typed_data';
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import 'package:aes_crypt/aes_crypt.dart';
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import 'package:encrypt/encrypt.dart';
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import 'dart:convert';
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import 'package:flutter/foundation.dart' as foundation;
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class CryptoUtil {
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static String getBase64EncodedSecureRandomString({int length = 32}) {
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return SecureRandom(length).base64;
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}
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static String encryptToBase64(
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String plainText, String base64Key, String base64IV) {
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final encrypter = AES(Key.fromBase64(base64Key));
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return encrypter
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.encrypt(
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Uint8List.fromList(utf8.encode(plainText)),
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iv: IV.fromBase64(base64IV),
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)
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.base64;
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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));
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return utf8.decode(encrypter
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.decrypt(
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Encrypted.fromBase64(base64CipherText),
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iv: IV.fromBase64(base64IV),
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)
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.toList());
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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 foundation.compute(runEncryptFileToFile, args);
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}
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static Future<String> encryptDataToFile(
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Uint8List source, String destinationPath, String key) async {
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final args = Map<String, dynamic>();
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args["key"] = key;
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args["source"] = source;
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args["destination"] = destinationPath;
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return foundation.compute(runEncryptDataToFile, args);
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}
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static Future<void> decryptFileToFile(
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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 foundation.compute(runDecryptFileToFile, args);
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}
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static Future<Uint8List> decryptFileToData(String sourcePath, String key) {
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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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return foundation.compute(runDecryptFileToData, args);
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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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