PHP:使用urldecode和mcrypt时JSON无法正常工作 [英] PHP: JSON not working when using urldecode and mcrypt

问题描述

当我通过json_decode运行json代码时，它可以正常工作，但是当我使用mcrypt加密并使用urlencode进行编码，然后进行解码和解密时，则不起作用.

When I run json code through json_decode it works fine, but when I encrypt with mcrypt and encode with urlencode then decode and decrypt, it doesn't work.

有人知道怎么了吗?

解密后的json与加密前的json完全一样.

The decrypted json looks exactly like the json before being encrypted.

我的代码:

<?
    $json = '{"entry1":{"name":"bob","age":"15"},"entry2":{"name":"bill","age":"50"}}';

    $iv_size = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB);
    $iv = mcrypt_create_iv($iv_size, MCRYPT_RAND);
    $key = "abcdefghijkl";
    $encrypted = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $json, MCRYPT_MODE_ECB, $iv);
    $urlencoded = urlencode($encrypted);
    $urldecoded = urldecode($urlencoded);
    $decrypted = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $urldecoded, MCRYPT_MODE_ECB, $iv);

    // json and decrypted json comparison
    echo "<h3>JSON & Decrypted JSON look the same:</h3>";
    echo $json . " // json<br>";
    echo $decrypted . " // decrypted json<br>"; 

    // json - works!
    echo "<h3>JSON works:</h3>";
    $data = json_decode($json); 
    $i = 1;

    while ($i <= 2) {
        $entrynumber = "entry" . $i;
        echo "name ----- " . $data->$entrynumber->name . "<br>";
        echo "age ------- " . $data->$entrynumber->age . "<br>";
        $i++;
    }

    // decrypted json - doesnt work!
    echo "<h3>Decrypted JSON doesnt work:</h3>";
    $data = json_decode($decrypted);
    $i = 1;

    while ($i <= 2) {
        $entrynumber = "entry" . $i;
        echo "name ----- " . $data->$entrynumber->name . "<br>";
        echo "age ------- " . $data->$entrynumber->age . "<br>";
        $i++;
    }
?>

如果将代码粘贴到php文档中，您将明白我的意思.

If you paste that code into a php document you will see what I mean.

截屏:

推荐答案

您的加密/解密算法正在添加填充以符合块大小.您应该从最后删除空字符，例如:

Your encryption/decryption algorithm is adding padding to conform to the block-size. You should remove null-characters from the end, for example:

rtrim($decrypted, "\0");

这篇关于PHP:使用urldecode和mcrypt时JSON无法正常工作的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！