如何在flutter dart中像安卓的"PBEWithMD5AndDES“那样进行加密？

dependencies:
  crypto: ^3.0.1

import 'package:crypto/crypto.dart';
import 'dart:convert';

import 'package:crypto/crypto.dart';
import 'dart:convert';

String encrypt(String plaintext, String password) {
  var salt = utf8.encode('salt'); // 设置盐值
  var iterations = 1000; // 迭代次数
  var keyLength = 8; // 密钥长度

  var key = Pbkdf2(
    macAlgorithm: Hmac(sha1),
    iterations: iterations,
    bits: keyLength * 8,
  ).process(utf8.encode(password), salt);

  var iv = utf8.encode('iv'); // 设置初始向量

  var encrypter = DES(Key(key.sublist(0, 8)), ECB(), PaddingScheme.pkcs7);
  var encrypted = encrypter.encrypt(utf8.encode(plaintext), iv: iv);

  return base64.encode(encrypted.bytes);
}

String decrypt(String ciphertext, String password) {
  var salt = utf8.encode('salt'); // 设置盐值
  var iterations = 1000; // 迭代次数
  var keyLength = 8; // 密钥长度

  var key = Pbkdf2(
    macAlgorithm: Hmac(sha1),
    iterations: iterations,
    bits: keyLength * 8,
  ).process(utf8.encode(password), salt);

  var iv = utf8.encode('iv'); // 设置初始向量

  var encrypter = DES(Key(key.sublist(0, 8)), ECB(), PaddingScheme.pkcs7);
  var decrypted = encrypter.decrypt64(ciphertext, iv: iv);

  return utf8.decode(decrypted);
}

void main() {
  var plaintext = 'Hello, World!';
  var password = 'password';

  var encrypted = encrypt(plaintext, password);
  print('Encrypted: $encrypted');

  var decrypted = decrypt(encrypted, password);
  print('Decrypted: $decrypted');
}