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Perform encryption and decryption on a separate isolate

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This commit is contained in:
Vishnu Mohandas 2020-08-14 02:30:40 +05:30
parent 7da487cd4e
commit 1ce1479dd9
1 changed files with 50 additions and 18 deletions
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68
lib/utils/crypto_util.dart
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@ -1,10 +1,11 @@
import 'dart:developer';
import 'dart:typed_data';
import 'package:aes_crypt/aes_crypt.dart';
import 'package:encrypt/encrypt.dart';
import 'dart:convert';
import 'package:flutter/foundation.dart' as foundation;
class CryptoUtil {
static String getBase64EncodedSecureRandomString({int length = 32}) {
return SecureRandom(length).base64;
@ -32,33 +33,64 @@ class CryptoUtil {
.toList());
}
static Future<void> encryptFileToFile(
static Future<String> encryptFileToFile(
String sourcePath, String destinationPath, String key) async {
final encrypter = getEncrypter(key);
await encrypter.encryptFile(sourcePath, destinationPath);
final args = Map<String, String>();
args["key"] = key;
args["source"] = sourcePath;
args["destination"] = destinationPath;
return foundation.compute(runEncryptFileToFile, args);
}
static Future<void> encryptDataToFile(
static Future<String> encryptDataToFile(
Uint8List source, String destinationPath, String key) async {
final encrypter = getEncrypter(key);
await encrypter.encryptDataToFile(source, destinationPath);
final args = Map<String, dynamic>();
args["key"] = key;
args["source"] = source;
args["destination"] = destinationPath;
return foundation.compute(runEncryptDataToFile, args);
}
static Future<void> decryptFileToFile(
String sourcePath, String destinationPath, String key) async {
final encrypter = getEncrypter(key);
await encrypter.decryptFile(sourcePath, destinationPath);
final args = Map<String, String>();
args["key"] = key;
args["source"] = sourcePath;
args["destination"] = destinationPath;
return foundation.compute(runDecryptFileToFile, args);
}
static Future<Uint8List> decryptFileToData(String sourcePath, String key) {
final encrypter = getEncrypter(key);
return encrypter.decryptDataFromFile(sourcePath);
}
static AesCrypt getEncrypter(String key) {
final encrypter = AesCrypt(key);
encrypter.aesSetMode(AesMode.cbc);
encrypter.setOverwriteMode(AesCryptOwMode.on);
return encrypter;
final args = Map<String, String>();
args["key"] = key;
args["source"] = sourcePath;
return foundation.compute(runDecryptFileToData, args);
}
}
Future<String> runEncryptFileToFile(Map<String, String> args) {
final encrypter = getEncrypter(args["key"]);
return encrypter.encryptFile(args["source"], args["destination"]);
}
Future<String> runEncryptDataToFile(Map<String, dynamic> args) {
final encrypter = getEncrypter(args["key"]);
return encrypter.encryptDataToFile(args["source"], args["destination"]);
}
Future<String> runDecryptFileToFile(Map<String, dynamic> args) async {
final encrypter = getEncrypter(args["key"]);
return encrypter.decryptFile(args["source"], args["destination"]);
}
Future<Uint8List> runDecryptFileToData(Map<String, dynamic> args) async {
final encrypter = getEncrypter(args["key"]);
return encrypter.decryptDataFromFile(args["source"]);
}
AesCrypt getEncrypter(String key) {
final encrypter = AesCrypt(key);
encrypter.aesSetMode(AesMode.cbc);
encrypter.setOverwriteMode(AesCryptOwMode.on);
return encrypter;
}