【发布时间】：2025-12-27 13:50:17
【问题描述】：
我想将下面的 PHP 脚本转换为 dart 我尝试了很多案例但没有任何帮助。
我尝试过以下代码；但是这里 encrypter.decrypt 方法抛出异常。
import 'package:encrypt/encrypt.dart' as EncryptPack;
import 'package:crypto/crypto.dart' as CryptoPack;
import 'dart:convert' as ConvertPack;
void main(List<String> arguments) {
var decrypt = extractPayload('$encryptedResopnse');
print(decrypt);
}
String extractPayload(String encryptedResopnse) {
if (encryptedResopnse == null) {
return '';
}
var separated = encryptedResopnse.split(':');
var secret = 'abcd123';
var data = ConvertPack.base64Decode(separated[0].trim());
var iv = CryptoPack.sha256.convert(data).toString().substring(0, 16);
var salt = CryptoPack.sha256.convert(data).toString().substring(16, 32);
var cipherText = CryptoPack.sha256.convert(data).toString().substring(64);
print('cipherText : ${cipherText}');
var ivObj = EncryptPack.IV.fromBase64(iv);
var generator = PBKDF2(hashAlgorithm: CryptoPack.sha1);
var hash = generator.generateBase64Key(secret, salt, 2048, 32);
print('hash : $hash');
var keyObj = EncryptPack.Key.fromBase64(hash);
final encrypter = EncryptPack.Encrypter(
EncryptPack.AES(keyObj, mode: EncryptPack.AESMode.cbc)); // Apply CBC mode
print(cipherText);
var firstBase64Decoding = cipherText; // First Base64 decoding
print(firstBase64Decoding);
final decrypted = encrypter.decrypt(
EncryptPack.Encrypted.fromBase64(firstBase64Decoding),
iv: ivObj);
return decrypted;
}
演示内容；
初始化 aes_secret
$aes_secret = '123456ac';
演示内容；
$ encryptedResopnse = “dBluiiVaHxhRcWJPaEip9kCGXDwufk3mFp8Xe9ioh9UKu6xL + CHUZrKvuf3xI7P1vFpvyyJ2Vz2Q3ieLEuRHk7NOinZU82FNdE3SOc9D2JTUFkif5ye3rVfQ7O39DpBnV41CduEP0OsASA8cr / RChqhulVHsaw6oUP0mg79M3Jlnpbab0EqlWRQx3k85rcajmov4cYLmsja ++ p2Lyw / BgOTKDf / yw3NWiK73Ot4P3C6urUiFNUCQTaOHCas1Sa8Wl0udQo1viyApuCE9 + Ll1SGnUu26uNy5RR55IFLVnAHuIOBDePjdAw3DapAtLFnSd + FrVjYcUuevMMliSy3PHiZU66qdyx8YSn13tYH6KGFxC / kvPsi5dLGorQ1TdNR5fxZGRPNQXEEIwWYSiF8LA0AJzVqpRoXs9PkEseCUnH1Sj5sBQgXQc0RA8vHWf3n2X / cABLEWaRHHlBlZjqjJXl0uKSgAWC3JoelABGSuSCvL3GJhn9SuSV6 + jCOftb6UCmw7LzalKB7UNIQPJ1vMtKl3 + 38RKDwp7a4xpdlln + IPP + R2aGuobuhk9ySSJYN3GCn7MoC / uaCAR0aEYsIHP1BQ + UgOPOsQFZEVdKMrFLJsJ3HtQ1fQxqpPQ13TClWCOyZu + W + 1q4W + 8CBJuI4l4Em + 91”;
class AesEncryption {
private static $encryptionMethod = 'aes-256-cbc';
private static $blockSize = 16;
private static $keySize = 32; // in bytes - so 256 bit for aes-256
private static $iterations = 2048;
public static function sign($data, $key) {
return hash_hmac('sha256', $data, $key);
}
/**
* @param string $encryptedContent
* @param string $secret
* @return string
*/
public static function decrypt(string $encryptedContent, string $secret) {
if (!$encryptedContent) {
return "";
}
// Separate payload from potential hmac
$separated = explode(":", trim($encryptedContent));
// Extract HMAC if signed
$hmac = (isset($separated[1])) ? $separated[1] : null;
// Convert data-string to array
$data = base64_decode($separated[0]);
// Then we remove the iv and salt to fetch the original text
$iv = substr($data, 0, self::$blockSize);
//echo($iv);
$salt = substr($data, self::$blockSize, self::$blockSize);
// We finally extract the ciphertext
$cipherText = substr($data, self::$blockSize * 2);
// Generate Key
$key = hash_pbkdf2('sha1', $secret, $salt, self::$iterations, self::$keySize, true);
// Check https://www.php.net/manual/en/function.openssl-decrypt.php
return openssl_decrypt($cipherText, self::$encryptionMethod, $key, OPENSSL_RAW_DATA, $iv);
}
}
【问题讨论】：
-
SO 不是代码编写服务。请发布您最近的飞镖代码并描述您的问题。
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@Topaco 我分享了代码。
标签： flutter dart cryptography aes