C# · 12月 24, 2021

C#中的PHP MCRYPT_RIJNDAEL_128加密

我正在尝试用C#重写这个函数.但是C#输出与PHP不匹配

PHP版本

// Encrypt data using AES128-cbcfunction encrypt($data,$key,$iv) { $cipher = mcrypt_module_open(MCRYPT_RIJNDAEL_128,”,’cbc’,”); mcrypt_generic_init($cipher,$iv); $multipass = mcrypt_generic($cipher,$data); mcrypt_generic_deinit($cipher); return $multipass;}

C#版本

public static string encrypt(string encryptionString,string iv,string key){ byte[] clearTextBytes = Encoding.UTF8.GetBytes(encryptionString); var rijn = SymmetricAlgorithm.Create(); rijn.KeySize = 128; rijn.Mode = CipherMode.CBC; var ms = new MemoryStream(); var cs = new CryptoStream(ms,rijn.CreateEncryptor(Encoding.UTF8.GetBytes(key),Encoding.UTF8.GetBytes(iv)),CryptoStreamMode.Write); cs.Write(clearTextBytes,clearTextBytes.Length); cs.Close(); var tmp = Encoding.UTF8.GetString(ms.ToArray()); return tmp;}解决方法 使用PHP加密/解密: class Cipher { private $key,$iv; function __construct() { $this->key = “edrtjfjfjlldldld”; $this->iv = “56666852251557009888889955123458”; } function encrypt($text) { $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_256,MCRYPT_MODE_CBC); $padding = $block – (strlen($text) % $block); $text .= str_repeat(chr($padding),$padding); $crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256,$this->key,$text,MCRYPT_MODE_CBC,$this->iv); return base64_encode($crypttext); } function decrypt($input) { $dectext = mcrypt_decrypt(MCRYPT_RIJNDAEL_256,base64_decode($input),$this->iv); return $dectext; }}

使用C#加密/解密:

public class RijndaelSimple { const string iv = “56666852251557009888889955123458”; const string key = “edrtjfjfjlldldld”; static public String EncryptRJ256(string plainText) { var encoding = new UTF8Encoding(); var Key = encoding.GetBytes(key); var IV = encoding.GetBytes(iv); byte[] encrypted; using (var rj = new RijndaelManaged()) { try { rj.Padding = PaddingMode.PKCS7; rj.Mode = CipherMode.CBC; rj.KeySize = 256; rj.BlockSize = 256; rj.Key = Key; rj.IV = IV; var ms = new MemoryStream(); using (var cs = new CryptoStream(ms,rj.CreateEncryptor(Key,IV),CryptoStreamMode.Write)) { using (var sr = new StreamWriter(cs)) { sr.Write(plainText); sr.Flush(); cs.FlushFinalBlock(); } encrypted = ms.ToArray(); } } finally { rj.Clear(); } } return Convert.ToBase64String(encrypted); } static public String DecryptRJ256(string input) { byte[] cypher = Convert.FromBase64String(input); var sRet = “”; var encoding = new UTF8Encoding(); var Key = encoding.GetBytes(key); var IV = encoding.GetBytes(iv); using (var rj = new RijndaelManaged()) { try { rj.Padding = PaddingMode.PKCS7; rj.Mode = CipherMode.CBC; rj.KeySize = 256; rj.BlockSize = 256; rj.Key = Key; rj.IV = IV; var ms = new MemoryStream(cypher); using (var cs = new CryptoStream(ms,rj.CreateDecryptor(Key,CryptoStreamMode.Read)) { using (var sr = new StreamReader(cs)) { sRet = sr.ReadLine(); } } } finally { rj.Clear(); } } return sRet; } }