問題描述

我一直在嘗試在服務器端、PHP 和客戶端上實現 mcrypt 加密/解密技術.我正在嘗試使用 mcrypt.js 庫作為:

I have been trying to implement mcrypt encryption/ decryption technique on both server end, PHP and client end. I am trying to use mcrypt.js library at the moment as:

<?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 echo $test_str ?>','');
    enc_str = B64.encode(enc_str);
    alert(enc_str); 
    // I don't get this same as encypted PHP text. i.e. $enc_str
    var dec_str = B64.decode('<?php echo $enc_str ?>');
    alert(mcrypt.Decrypt(dec_str,'')); 
    // I don't get this same as decypted PHP text. 
    // i.e. string_decrypt($enc_str)
</script>

我在 mcrypt.js 庫中使用了以下這些私有變量.

I have used these following private vars at the mcrypt.js library.

 var cMode='ecb';
 var cCipher='rijndael-256';
 var cKey='testtesttesttesttesttesttesttest'; 
 //I am providing the same key

正如我上面評論的，為什么 enc_str 不等于 $enc_str 以及為什么它是 mcrypt.Decrypt('<?php echo $enc_str?>', '') 不等于 string_decrypt($enc_str, $key) ?

As I commented above, why is it enc_str not equal as $enc_str and why is it mcrypt.Decrypt('<?php echo $enc_str ?>', '') not equal as string_decrypt($enc_str, $key) ?

更新的問題:

我嘗試了 base64 編碼/解碼甚至 hex2bin/bin2hex 來解析這些字符串，但這兩個產生了以下結果:

I tried both base64 encode/ decode and even hex2bin/ bin2hex to parse those strings but these two produced following results:

使用 Hex2bin/Bin2hex

PHP 結果:

Provided Text: This is test message.
Encyrpted Value: a51e970427ec8f666a5684cc1712ad03b29889cc10f4ccbf55733564d11c0386
Decrypted Value: This is test message.

JS 結果:

Provided Text:This is test message.
Mcrypted value:￥'ìfjVì-2ì?ì?Us5d?
Encyrpted Value:a51e970427ec8f666a5684cc1712ad03b29889cc10f4ccbf55733564d11c0386
After Hex to Bin Text:￥'ìfjVì-2ì?ì?Us5d?
Decrypted Value:This is test message.???????????
/*These diamond with question mark is produced while decypting the value.*/

<小時>

使用 Base64 編碼/解碼:

PHP 結果:

Provided Text: This is test message.
Mcrypt encrypted value : ￥—'ìfjV?ì-2?‰ì?ì?Us5d??
/*
 Here mcrypted value provided by JS and PHP is different
 That is causing to produce different value at two ends
*/
Encyrpted Value: pR6XBCfsj2ZqVoTMFxKtA7KYicwQ9My/VXM1ZNEcA4Y=
Decrypted Value: This is test message.

JS 結果:

Provided Text:This is test message.
Mcrypted value:￥'ìfjVì-2ì?ì?Us5d?
Encyrpted Value:wqUewpcEJ8Oswo9malbChMOMFxLCrQPCssKYwonDjBDDtMOMwr9VczVkw5EcA8KG
After Base64 Decode:￥'ìfjVì-2ì?ì?Us5d????
Decrypted Value:This is test message.???????????bFaêF?+Jéó!??

并且在這兩種情況下，UTf-8 內容都無法在 JS 端解密.

And on both cases, UTf-8 content can not be decrypted on JS end.

*鏈接:*

Mcrypt JS 庫

Base64 JS 庫

推薦答案

主要問題似乎是您的 string_encrypt 和 string_decrypt PHP 函數無法訪問$key 變量，因此對于加密密鑰 mcrypt_encrypt 使用