php mcrypt_decrypt()问题

时间:2012-03-11 14:01:39

标签: php mcrypt

我正在通过以下php代码从一个页面传递信息..

Index.php页面:

<?php
include("secure/content/database/db.php");
$sql = mysql_query("SELECT * FROM press");
while($re =  mysql_fetch_array($sql))
{   


$id= (int) $re['id'];                   

$key = "bladeyeshibbir?1%59";

$size = mcrypt_get_iv_size(MCRYPT_CAST_256, MCRYPT_MODE_CFB);
$iv = mcrypt_create_iv($size, MCRYPT_DEV_RANDOM)       

$encrypted_data=mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $id, MCRYPT_MODE_ECB, $iv);

$id = urlencode(base64_encode($encrypted_data));

$page = mysql_real_escape_string(trim($re['pagename']));
$content = mysql_real_escape_string(trim($re['content']));
echo "<li><a href='press.php?id=$id&request=$md'>$page</a></li>";
            }

            ?>

Press.php页面

<?php
include("secure/content/database/db.php");
include("header.php");

$id = $_REQUEST["id"];
$key = "bladeyeshibbir?1%59#";

$size = mcrypt_get_iv_size(MCRYPT_CAST_256, MCRYPT_MODE_CFB);
$iv = mcrypt_create_iv($size, MCRYPT_DEV_RANDOM)       

$decrypted_data=mcrypt_decrypt(MCRYPT_3DES, $key, $id, MCRYPT_MODE_CBC, $iv); 
$url_id = base64_decode(urldecode($decrypted_data));

$request = $_REQUEST['request'];

$sql = mysql_query("SELECT * FROM press WHERE id='$url_id'  ");
$re = mysql_fetch_array($sql);

$pagename = mysql_real_escape_string(trim($re['pagename']));
$content = mysql_real_escape_string(trim($re['content']));  

echo "<title>$pagename</title>";

echo $content;

include("fotter.php");

?>  

但是我收到了这个错误:

  

警告:mcrypt_decrypt()[function.mcrypt-decrypt]:尝试使用   空IV,不建议在C:\ xampp \ htdocs \ audock \ press.php中使用   在第10行。

实际上,我想要的是用户无法看到查询字符串变量的实际值。

2 个答案:

答案 0 :(得分:0)

结帐this post。您不应将mcrypt_ecbmcrypt_decrypt一起使用,而应使用mcrypt_encrypt。然后,当使用mcrypt_encrypt进行加密时,您需要创建一个带有mcrypt_create_ivdocs here)的初始化向量,您之后应该使用该初始化向量进行解密。

答案 1 :(得分:0)

使用零字节iv的示例

$encrypted_data=mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $id, MCRYPT_MODE_ECB, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0");