CodeIgniter 3.1.3 发送加密的 URL 变量偶尔不起作用

Question

我正在尝试使用新的 CI 加密库通过 url 传递加密的 user_ID 变量，将变量传递到控制器和模型中，以根据传递的变量值运行查询。问题是有时它正在工作，有时它不是。我按照用户指南中的说明设置了我的加密密钥，并且我已经在自动加载中加载了库：

$key = bin2hex($this->encryption->create_key(16));

并将密钥设置到 config.php:

$config['encryption_key'] = bin2hex('some_bin2hex_numbers_and_letters');

查看（获取要传递的变量）：

<div class="col-sm-8">
    <?php foreach ($user_list as $row) {
        $ID = $row['user_ID'];
        $UID = $this->encryption->encrypt($ID);
        $username = $row['user_Username'];
        $firstname = $row['user_FirstName'];
        $lastname = $row['user_LastName']; 
    ?>

    <a href="<?php echo base_url()?>Admin/User?uid=<?php echo $UID;?>">
        <h2 style="font-family:'Comic Sans MS', cursive;\"> <?php echo $username." (".$firstname." ".$lastname.") </h2> <br />" ?>
    </a>

    <?php } ?>
</div>

控制器：

public function User() {
    $ID  = $this->input->get('uid');
    $UID = $this->encryption->decrypt($ID);
    $data['user'] = $this->Admin_model->getUserData($UID);
    $this->load->view('pages/admin/admin_header');  
    $this->load->view('pages/admin/admin_user_data', $data);    
    $this->load->view('templates/footer2'); 
}

model（获取传递的变量并返回一行）：

public function getUserData($UID) {
    $query = $this->db->query("SELECT * FROM `tbl_user` WHERE `tbl_user`.`user_ID`='$data'");
    $row = $query->row();
    return $row;
}

view admin_user_data（显示传递变量结果的视图）：

<h1>
    <?php 
    echo "User ID: ".$user->user_ID."<br />";
    echo "Username: ".$user->user_Username."<br />";
    echo "First Name: ".$user->user_FirstName."<br />";
    echo "Last Name: ".$user->user_LastName."<br />";
    ?>
</h1>

Answer 1

其实这个方法对我有用。

用于加密

$this->load->library('encryption'); 

$this->encryption->initialize(
array(
       'cipher' => 'aes-256',
       'mode' => 'ctr',
       'key' => '4lWC8cegO92vhTRbiRy21sh90TwFz6DR' // A random key generated by visiting http://randomkeygen.com/
     )
);   

$enc_id = $this->encryption->encrypt($id);

用于解密

    $this->load->library('encryption'); 

    $this->encryption->initialize(
    array(
            'cipher' => 'aes-256',
            'mode' => 'ctr',
            'key' => '4lWC8cegO92vhTRbiRy21sh90TwFz6DR' // Same key you used for encryption
        )
    );  

    $dec_id = $this->encryption->decrypt($enc_id);

上述方法每次都对我有用。如果您遇到任何问题，请在下方评论。