如何使用 Dart 加密視頻文件？

Question

我正在嘗試使用 dart 加密視頻剪輯。 我已經測試了這個 java 代碼https://stackoverflow.com/a/9496626/8511016並希望使用 dart 做同樣的事情。

Answer 1

這是我找到的解決方案。 希望能幫助到你。 記得在pubspec.yaml中添加包加密包

import 'dart:convert';
import 'dart:io';

import 'package:encrypt/encrypt.dart';

main() {

  perfomEncryptionTasks();
}

perfomEncryptionTasks() async {
  await encryptFile();
  await decryptFile();
}

encryptFile() async {
  File inFile = new File("video.mp4");
  File outFile = new File("videoenc.aes");

  bool outFileExists = await outFile.exists();

  if(!outFileExists){
    await outFile.create();
  }

  final videoFileContents = await inFile.readAsStringSync(encoding: latin1);

  final key = Key.fromUtf8('my 32 length key................');
  final iv = IV.fromLength(16);

  final encrypter = Encrypter(AES(key));

  final encrypted = encrypter.encrypt(videoFileContents, iv: iv);
  await outFile.writeAsBytes(encrypted.bytes);
}

decryptFile() async {
  File inFile = new File("videoenc.aes");
  File outFile = new File("videodec.mp4");

  bool outFileExists = await outFile.exists();

  if(!outFileExists){
    await outFile.create();
  }

  final videoFileContents = await inFile.readAsBytesSync();

  final key = Key.fromUtf8('my 32 length key................');
  final iv = IV.fromLength(16);

  final encrypter = Encrypter(AES(key));

  final encryptedFile = Encrypted(videoFileContents);
  final decrypted = encrypter.decrypt(encryptedFile, iv: iv);

  final decryptedBytes = latin1.encode(decrypted);
  await outFile.writeAsBytes(decryptedBytes);

}