相关疑难解决方法(0)

我目前在解密由php mcrypt加密的邮件方面遇到了一些问题.php代码如下:

<?php
  //$iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC);
  $iv = "45287112549354892144548565456541";
  $key = "anjueolkdiwpoida";
  $text = "This is my encrypted message";
  $crypttext = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $text, MCRYPT_MODE_CBC, $iv);
  $crypttext = urlencode($crypttext);
  $crypttext64=base64_encode($crypttext);
  print($crypttext64) . "\n<br/>";
?>

然后将加密的消息发送到ASP.NET平台(C#).但是,我在保留解密顺序(base64解码到urldecode)时遇到问题.我在ASP.NET中的代码如下(iv和key与php中的相同):

public string Decode(string str)
{
    byte[] decbuff = Convert.FromBase64String(str);
    return System.Text.Encoding.UTF8.GetString(decbuff);
}

static public String DecryptRJ256(string cypher, string KeyString, string IVString)
{

    string sRet = "";
    RijndaelManaged rj = new RijndaelManaged();
    UTF8Encoding encoding = new UTF8Encoding();


    try
    {
        //byte[] message = Convert.FromBase64String(cypher);
        byte[] message …

更新

我已对C#代码进行了更改,因此它使用的块大小为256.但是现在hello世界看起来像这个http://pastebin.com/5sXhMV11而且我无法弄清楚我应该使用rtrim()来获取最后骑的烂摊子.

另外当你说IV应该是随机的时,你的意思是不要再使用相同的IV一次或者我编码错误的方式？

再次感谢!

嗨,

我正在尝试使用在C#中加密的PHP解密字符串.我似乎无法让PHP使用mcrypt解密它,并且可以提供一些帮助.我用php得到以下错误,所以我猜我没有正确设置IV.

错误:IV参数必须与块大小一样长

两个函数使用相同的密码,密钥,IV并设置为CBC模式:

加密文本来自c#= UmzUCnAzThH0nMkIuMisqg ==
key 32 long = qwertyuiopasdfghjklzxcvbnmqwerty
iv 16 long = 1234567890123456

C#

    public static string EncryptString(string message, string KeyString, string IVString)
    {
        byte[] Key = ASCIIEncoding.UTF8.GetBytes(KeyString);
        byte[] IV = ASCIIEncoding.UTF8.GetBytes(IVString);

        string encrypted = null;
        RijndaelManaged rj = new RijndaelManaged();
        rj.Key = Key;
        rj.IV = IV;
        rj.Mode = CipherMode.CBC;

        try
        {
            MemoryStream ms = new MemoryStream();

            using (CryptoStream cs = new CryptoStream(ms, rj.CreateEncryptor(Key, IV), CryptoStreamMode.Write))
            {
                using (StreamWriter sw …

我一直在尝试在服务器端,PHP和客户端端实现mcrypt加密/解密技术.我正在尝试使用mcrypt.js库,因为:

<?php 
$key = 'testtesttesttesttesttesttesttest';

function string_encrypt($string, $key) {
    $crypted_text = mcrypt_encrypt(
                        MCRYPT_RIJNDAEL_128, 
                        $key, 
                        $string, 
                        MCRYPT_MODE_ECB
                    );
    return base64_encode($crypted_text);
}

function string_decrypt($encrypted_string, $key) {
    $decrypted_text = mcrypt_decrypt(
                        MCRYPT_RIJNDAEL_128, 
                        $key, 
                        base64_decode($encrypted_string), 
                        MCRYPT_MODE_ECB
                    );
    return trim($decrypted_text);
}

echo 'Provided Text:    '.$test_str = 'This is test message.';
echo '<br />';
echo 'Encyrpted Value:  '.$enc_str = string_encrypt($test_str, $key);   
echo '<br />';
echo 'Decrypted Value:  '.string_decrypt($enc_str, $key);                               
echo '<br />';
?>

<script src='rijndael.js'></script>
<script src='mcrypt.js'></script>
<script src='base64v1_0.js'></script>

<script lang='javascript'>
    var enc_str = mcrypt.Encrypt('<?php …