[Flutter] Flutter Error Invalid argument(s): Input data length must be a multiple of cipher's...

I have an error when trying to decrypt in dart language. with message:

Invalid argument(s): Input data length must be a multiple of cipher's block size
​

Here is sample PHP code

function encryptDomainWithToken($domain, $token)
{
// Encryption method using OpenSSL with AES-256-CBC
$method = 'AES-256-CBC';
$ivLength = openssl_cipher_iv_length($method); // IV length
$iv = openssl_random_pseudo_bytes($ivLength); // Initialization Vector
$key = hash('sha256', $token, true); // Derive encryption key from token

// Data to encrypt
$data = $domain;

// Encrypt data
$encryptedData = openssl_encrypt($data, $method, $key, 0, $iv);

// Combine IV with encrypted data and encode in base64
return base64_encode($iv . $encryptedData);
}



Here is dart code

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

String decryptDomainWithToken(String encrypted, String token) {
final method = AESMode.cbc;

// Derive key from token using SHA-256
final key = sha256.convert(utf8.encode(token)).bytes;

final encrypter = Encrypter(AES(Key(Uint8List.fromList(key)), mode: method));

// Decode the base64 encrypted string
final decodedData = base64.decode(encrypted);

// Determine IV length for AES-256-CBC
final ivLength = 16;
final iv = IV(Uint8List.fromList(decodedData.sublist(0, ivLength)));

final encryptedData = Encrypted(Uint8List.fromList(decodedData.sublist(ivLength)));

// Decrypt the data
return encrypter.decrypt(encryptedData, iv: iv);

}


How to fix it?

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