php 错误：加密库需要 codeigniter 中的 Mcrypt 扩展
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【中文标题】php 错误：加密库需要 codeigniter 中的 Mcrypt 扩展【英文标题】：php error: The Encrypt library requires the Mcrypt extension in codeigniter 【发布时间】：2016-06-18 07:20:53 【问题描述】：我有一个登录和注册表单，并使用加密库来加密密码。我正在为我的服务器使用 Xampp，我的系统工作正常。
密码加密代码：
$this->encrypt->encode('my password');
添加加密库
$autoload['libraries'] = array('encrypt');
并在配置中设置密钥：
$config['encryption_key'] = 'nmsc encrypt secret key';
我的代码在 Windows 中使用 xampp 服务器运行良好，但是当我尝试将我的网站上传到 ubuntu 服务器时出现错误提示
加密库需要 Mcrypt 扩展
如何解决这个问题？参考本指南https://www.codeigniter.com/user_guide/libraries/encryption.html，但我不知道如何安装该 mcrypt。我的网站需要从 ubuntu 服务器运行。如何安装或解决该问题？
【问题讨论】：
您不应该使用 mcrypt，它是废弃软件，多年未更新，不支持标准填充（PKCS#5 或 PKCS#7），并且使用空填充，这将无法与二进制文件正常工作数据。请考虑使用defuse 或RNCryptor-php 以获得完整的安全解决方案。 CodeIgniter 3 提供了一个不同的加密类，即使不是所有的事情都正确。如果您可以访问 codeigniter 3，请使用它。 密码必须散列，而不是加密。使用secure.php.net/password 这个答案对我有用。 ***.com/a/54334312/8889610 【参考方案1】：最佳解决方案是（仅适用于 CI 3 及更高版本）：
改变
$this->load->library('encrypt');
到
$this->load->library('encryption');
【讨论】：
请同时注明文件名 它是否适用于 CI4？【参考方案2】：你应该安装 PHP mcrypt 模块；
sudo apt-get install php5-mcrypt
sudo php5enmod mcrypt
通常你会很好;)
【讨论】：
我没有使用 ubuntu 来开发我的项目，有没有办法使用 xampp 从 Windows 安装 php5-mcrypt？我的学校正在使用 ubuntu 服务器。 我不是windows用户，但我发现这个链接可能对你有帮助myoddweb.com/2010/11/18/install-mcrypt-for-php-on-windows 但我必须建议您切换到 Linux。 ^^ 执行此操作后不要忘记重新加载 apache：service apache2 reload【参考方案3】：
将此代码保存到库/Encrypt.php
它一定是工作！
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* CodeIgniter Encryption Class
*
* Provides two-way keyed encoding using XOR Hashing and Mcrypt
*
* @package CodeIgniter
* @subpackage Libraries
* @category Libraries
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/libraries/encryption.html
*/
class CI_Encrypt
var $CI;
var $encryption_key = '';
var $_hash_type = 'sha1';
var $_mcrypt_exists = FALSE;
var $_mcrypt_cipher;
var $_mcrypt_mode;
/**
* Constructor
*
* Simply determines whether the mcrypt library exists.
*
*/
public function __construct()
$this->CI =& get_instance();
$this->_mcrypt_exists = ( ! function_exists('mcrypt_encrypt')) ? FALSE : TRUE;
log_message('debug', "Encrypt Class Initialized");
// --------------------------------------------------------------------
/**
* Fetch the encryption key
*
* Returns it as MD5 in order to have an exact-length 128 bit key.
* Mcrypt is sensitive to keys that are not the correct length
*
* @access public
* @param string
* @return string
*/
function get_key($key = '')
if ($key == '')
if ($this->encryption_key != '')
return $this->encryption_key;
$CI =& get_instance();
$key = $CI->config->item('encryption_key');
if ($key == FALSE)
show_error('In order to use the encryption class requires that you set an encryption key in your config file.');
return md5($key);
// --------------------------------------------------------------------
/**
* Set the encryption key
*
* @access public
* @param string
* @return void
*/
function set_key($key = '')
$this->encryption_key = $key;
// --------------------------------------------------------------------
/**
* Encode
*
* Encodes the message string using bitwise XOR encoding.
* The key is combined with a random hash, and then it
* too gets converted using XOR. The whole thing is then run
* through mcrypt (if supported) using the randomized key.
* The end result is a double-encrypted message string
* that is randomized with each call to this function,
* even if the supplied message and key are the same.
*
* @access public
* @param string the string to encode
* @param string the key
* @return string
*/
function encode($string, $key = '')
$key = $this->get_key($key);
if ($this->_mcrypt_exists === TRUE)
$enc = $this->mcrypt_encode($string, $key);
else
$enc = $this->_xor_encode($string, $key);
return base64_encode($enc);
// --------------------------------------------------------------------
/**
* Decode
*
* Reverses the above process
*
* @access public
* @param string
* @param string
* @return string
*/
function decode($string, $key = '')
$key = $this->get_key($key);
if (preg_match('/[^a-zA-Z0-9\/\+=]/', $string))
return FALSE;
$dec = base64_decode($string);
if ($this->_mcrypt_exists === TRUE)
if (($dec = $this->mcrypt_decode($dec, $key)) === FALSE)
return FALSE;
else
$dec = $this->_xor_decode($dec, $key);
return $dec;
// --------------------------------------------------------------------
/**
* Encode from Legacy
*
* Takes an encoded string from the original Encryption class algorithms and
* returns a newly encoded string using the improved method added in 2.0.0
* This allows for backwards compatibility and a method to transition to the
* new encryption algorithms.
*
* For more details, see http://codeigniter.com/user_guide/installation/upgrade_200.html#encryption
*
* @access public
* @param string
* @param int (mcrypt mode constant)
* @param string
* @return string
*/
function encode_from_legacy($string, $legacy_mode = MCRYPT_MODE_ECB, $key = '')
if ($this->_mcrypt_exists === FALSE)
log_message('error', 'Encoding from legacy is available only when Mcrypt is in use.');
return FALSE;
// decode it first
// set mode temporarily to what it was when string was encoded with the legacy
// algorithm - typically MCRYPT_MODE_ECB
$current_mode = $this->_get_mode();
$this->set_mode($legacy_mode);
$key = $this->get_key($key);
if (preg_match('/[^a-zA-Z0-9\/\+=]/', $string))
return FALSE;
$dec = base64_decode($string);
if (($dec = $this->mcrypt_decode($dec, $key)) === FALSE)
return FALSE;
$dec = $this->_xor_decode($dec, $key);
// set the mcrypt mode back to what it should be, typically MCRYPT_MODE_CBC
$this->set_mode($current_mode);
// and re-encode
return base64_encode($this->mcrypt_encode($dec, $key));
// --------------------------------------------------------------------
/**
* XOR Encode
*
* Takes a plain-text string and key as input and generates an
* encoded bit-string using XOR
*
* @access private
* @param string
* @param string
* @return string
*/
function _xor_encode($string, $key)
$rand = '';
while (strlen($rand) < 32)
$rand .= mt_rand(0, mt_getrandmax());
$rand = $this->hash($rand);
$enc = '';
for ($i = 0; $i < strlen($string); $i++)
$enc .= substr($rand, ($i % strlen($rand)), 1).(substr($rand, ($i % strlen($rand)), 1) ^ substr($string, $i, 1));
return $this->_xor_merge($enc, $key);
// --------------------------------------------------------------------
/**
* XOR Decode
*
* Takes an encoded string and key as input and generates the
* plain-text original message
*
* @access private
* @param string
* @param string
* @return string
*/
function _xor_decode($string, $key)
$string = $this->_xor_merge($string, $key);
$dec = '';
for ($i = 0; $i < strlen($string); $i++)
$dec .= (substr($string, $i++, 1) ^ substr($string, $i, 1));
return $dec;
// --------------------------------------------------------------------
/**
* XOR key + string Combiner
*
* Takes a string and key as input and computes the difference using XOR
*
* @access private
* @param string
* @param string
* @return string
*/
function _xor_merge($string, $key)
$hash = $this->hash($key);
$str = '';
for ($i = 0; $i < strlen($string); $i++)
$str .= substr($string, $i, 1) ^ substr($hash, ($i % strlen($hash)), 1);
return $str;
// --------------------------------------------------------------------
/**
* Encrypt using Mcrypt
*
* @access public
* @param string
* @param string
* @return string
*/
function mcrypt_encode($data, $key)
$init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode());
$init_vect = mcrypt_create_iv($init_size, MCRYPT_RAND);
return $this->_add_cipher_noise($init_vect.mcrypt_encrypt($this->_get_cipher(), $key, $data, $this->_get_mode(), $init_vect), $key);
// --------------------------------------------------------------------
/**
* Decrypt using Mcrypt
*
* @access public
* @param string
* @param string
* @return string
*/
function mcrypt_decode($data, $key)
$data = $this->_remove_cipher_noise($data, $key);
$init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode());
if ($init_size > strlen($data))
return FALSE;
$init_vect = substr($data, 0, $init_size);
$data = substr($data, $init_size);
return rtrim(mcrypt_decrypt($this->_get_cipher(), $key, $data, $this->_get_mode(), $init_vect), "\0");
// --------------------------------------------------------------------
/**
* Adds permuted noise to the IV + encrypted data to protect
* against Man-in-the-middle attacks on CBC mode ciphers
* http://www.ciphersbyritter.com/GLOSSARY.HTM#IV
*
* Function description
*
* @access private
* @param string
* @param string
* @return string
*/
function _add_cipher_noise($data, $key)
$keyhash = $this->hash($key);
$keylen = strlen($keyhash);
$str = '';
for ($i = 0, $j = 0, $len = strlen($data); $i < $len; ++$i, ++$j)
if ($j >= $keylen)
$j = 0;
$str .= chr((ord($data[$i]) + ord($keyhash[$j])) % 256);
return $str;
// --------------------------------------------------------------------
/**
* Removes permuted noise from the IV + encrypted data, reversing
* _add_cipher_noise()
*
* Function description
*
* @access public
* @param type
* @return type
*/
function _remove_cipher_noise($data, $key)
$keyhash = $this->hash($key);
$keylen = strlen($keyhash);
$str = '';
for ($i = 0, $j = 0, $len = strlen($data); $i < $len; ++$i, ++$j)
if ($j >= $keylen)
$j = 0;
$temp = ord($data[$i]) - ord($keyhash[$j]);
if ($temp < 0)
$temp = $temp + 256;
$str .= chr($temp);
return $str;
// --------------------------------------------------------------------
/**
* Set the Mcrypt Cipher
*
* @access public
* @param constant
* @return string
*/
function set_cipher($cipher)
$this->_mcrypt_cipher = $cipher;
// --------------------------------------------------------------------
/**
* Set the Mcrypt Mode
*
* @access public
* @param constant
* @return string
*/
function set_mode($mode)
$this->_mcrypt_mode = $mode;
// --------------------------------------------------------------------
/**
* Get Mcrypt cipher Value
*
* @access private
* @return string
*/
function _get_cipher()
if ($this->_mcrypt_cipher == '')
$this->_mcrypt_cipher = MCRYPT_RIJNDAEL_256;
return $this->_mcrypt_cipher;
// --------------------------------------------------------------------
/**
* Get Mcrypt Mode Value
*
* @access private
* @return string
*/
function _get_mode()
if ($this->_mcrypt_mode == '')
$this->_mcrypt_mode = MCRYPT_MODE_CBC;
return $this->_mcrypt_mode;
// --------------------------------------------------------------------
/**
* Set the Hash type
*
* @access public
* @param string
* @return string
*/
function set_hash($type = 'sha1')
$this->_hash_type = ($type != 'sha1' AND $type != 'md5') ? 'sha1' : $type;
// --------------------------------------------------------------------
/**
* Hash encode a string
*
* @access public
* @param string
* @return string
*/
function hash($str)
return ($this->_hash_type == 'sha1') ? $this->sha1($str) : md5($str);
// --------------------------------------------------------------------
/**
* Generate an SHA1 Hash
*
* @access public
* @param string
* @return string
*/
function sha1($str)
if ( ! function_exists('sha1'))
if ( ! function_exists('mhash'))
require_once(BASEPATH.'libraries/Sha1.php');
$SH = new CI_SHA;
return $SH->generate($str);
else
return bin2hex(mhash(MHASH_SHA1, $str));
else
return sha1($str);
// END CI_Encrypt class
/* End of file Encrypt.php */
【讨论】：
谢谢，我在 godady 服务器上的代码中出现错误，但这个解决方案有效。【参考方案4】：我收到此错误是因为我已从 XAMPP(php5) 切换到 XAMPP(php7)， 为此，我在这里用新文件替换了旧的 CI->system->libraries->encrypt.php：encrypt.php，它起作用了。
在这个新文件中，我们使用下面的代码检查 __construct 函数中是否支持 mcrypt_encrypt
$this->_mcrypt_exists = ( ! function_exists('mcrypt_encrypt')) ? FALSE : TRUE;
基于此，我们在 mcrypt_encode 和 _xor_encode 之间使用不同的函数。
要知道，如果你在 __construct 函数中看到这个旧文件，你会看到实际的错误检查
if (($this->_mcrypt_exists = function_exists('mcrypt_encrypt')) === FALSE)
show_error('The Encrypt library requires the Mcrypt extension.');
它对我有用。
【讨论】：
这行得通，因为它修复了像 Codeigniter 2 这样的旧系统中为 PHP 5.x 设计的错误 PHP 函数 也为我工作，谢谢。【参考方案5】：对我有用的解决方案是
之前：
$autoload['libraries'] = array('database','session','upload','form_validation','encrypt','pagination');
之后：
$autoload['libraries'] = array('database','session','upload','form_validation','pagination');
我刚刚从自动加载库中删除了加密库。
【讨论】：
【参考方案6】：对于 php 7.2 版本和 Ubuntu 系统，以下命令适用于我 -
sudo apt-get -y install gcc make autoconf libc-dev pkg-config
sudo apt-get -y install php7.2-dev
sudo apt-get -y install libmcrypt-dev
pecl install mcrypt-1.0.1
然后它会显示一条消息“您应该在 php.ini 中添加 mcrypt 扩展”
extension=mcrypt.so
然后重启apache服务器
service apache2 restart
or
systemctl restart apache2
【讨论】：
【参考方案7】：听起来你需要更新你的 php 版本。
http://php.net/manual/en/mcrypt.requirements.php
【讨论】：
【参考方案8】：打开你的：/etc/php5/apache2/php.ini
示例：sudo gedit /etc/php5/apache2/php.ini
在第 1728 行，输入以下代码：
extension=mcrypt.so
然后重新启动您的 Apache。
【讨论】：
对我没有任何改善【参考方案9】：我遇到了类似的问题，所以我将此代码放入/system/libraris/Encrypt.php，现在它运行正常。
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
/**
* CodeIgniter
*
* An open source application development framework for PHP 5.1.6 or newer
*
* @package CodeIgniter
* @author ExpressionEngine Dev Team
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
* @license http://codeigniter.com/user_guide/license.html
* @link http://codeigniter.com
* @since Version 1.0
* @filesource
*/
// ------------------------------------------------------------------------
/**
* CodeIgniter Encryption Class
*
* Provides two-way keyed encoding using XOR Hashing and Mcrypt
*
* @package CodeIgniter
* @subpackage Libraries
* @category Libraries
* @author ExpressionEngine Dev Team
* @link http://codeigniter.com/user_guide/libraries/encryption.html
*/
class CI_Encrypt
var $CI;
var $encryption_key = '';
var $_hash_type = 'sha1';
var $_mcrypt_exists = FALSE;
var $_mcrypt_cipher;
var $_mcrypt_mode;
/**
* Constructor
*
* Simply determines whether the mcrypt library exists.
*
*/
public function __construct()
$this->CI =& get_instance();
$this->_mcrypt_exists = ( ! function_exists('mcrypt_encrypt')) ? FALSE : TRUE;
log_message('debug', "Encrypt Class Initialized");
// --------------------------------------------------------------------
/**
* Fetch the encryption key
*
* Returns it as MD5 in order to have an exact-length 128 bit key.
* Mcrypt is sensitive to keys that are not the correct length
*
* @access public
* @param string
* @return string
*/
function get_key($key = '')
if ($key == '')
if ($this->encryption_key != '')
return $this->encryption_key;
$CI =& get_instance();
$key = $CI->config->item('encryption_key');
if ($key == FALSE)
show_error('In order to use the encryption class requires that you set an encryption key in your config file.');
return md5($key);
// --------------------------------------------------------------------
/**
* Set the encryption key
*
* @access public
* @param string
* @return void
*/
function set_key($key = '')
$this->encryption_key = $key;
// --------------------------------------------------------------------
/**
* Encode
*
* Encodes the message string using bitwise XOR encoding.
* The key is combined with a random hash, and then it
* too gets converted using XOR. The whole thing is then run
* through mcrypt (if supported) using the randomized key.
* The end result is a double-encrypted message string
* that is randomized with each call to this function,
* even if the supplied message and key are the same.
*
* @access public
* @param string the string to encode
* @param string the key
* @return string
*/
function encode($string, $key = '')
$key = $this->get_key($key);
if ($this->_mcrypt_exists === TRUE)
$enc = $this->mcrypt_encode($string, $key);
else
$enc = $this->_xor_encode($string, $key);
return base64_encode($enc);
// --------------------------------------------------------------------
/**
* Decode
*
* Reverses the above process
*
* @access public
* @param string
* @param string
* @return string
*/
function decode($string, $key = '')
$key = $this->get_key($key);
if (preg_match('/[^a-zA-Z0-9\/\+=]/', $string))
return FALSE;
$dec = base64_decode($string);
if ($this->_mcrypt_exists === TRUE)
if (($dec = $this->mcrypt_decode($dec, $key)) === FALSE)
return FALSE;
else
$dec = $this->_xor_decode($dec, $key);
return $dec;
// --------------------------------------------------------------------
/**
* Encode from Legacy
*
* Takes an encoded string from the original Encryption class algorithms and
* returns a newly encoded string using the improved method added in 2.0.0
* This allows for backwards compatibility and a method to transition to the
* new encryption algorithms.
*
* For more details, see http://codeigniter.com/user_guide/installation/upgrade_200.html#encryption
*
* @access public
* @param string
* @param int (mcrypt mode constant)
* @param string
* @return string
*/
function encode_from_legacy($string, $legacy_mode = MCRYPT_MODE_ECB, $key = '')
if ($this->_mcrypt_exists === FALSE)
log_message('error', 'Encoding from legacy is available only when Mcrypt is in use.');
return FALSE;
// decode it first
// set mode temporarily to what it was when string was encoded with the legacy
// algorithm - typically MCRYPT_MODE_ECB
$current_mode = $this->_get_mode();
$this->set_mode($legacy_mode);
$key = $this->get_key($key);
if (preg_match('/[^a-zA-Z0-9\/\+=]/', $string))
return FALSE;
$dec = base64_decode($string);
if (($dec = $this->mcrypt_decode($dec, $key)) === FALSE)
return FALSE;
$dec = $this->_xor_decode($dec, $key);
// set the mcrypt mode back to what it should be, typically MCRYPT_MODE_CBC
$this->set_mode($current_mode);
// and re-encode
return base64_encode($this->mcrypt_encode($dec, $key));
// --------------------------------------------------------------------
/**
* XOR Encode
*
* Takes a plain-text string and key as input and generates an
* encoded bit-string using XOR
*
* @access private
* @param string
* @param string
* @return string
*/
function _xor_encode($string, $key)
$rand = '';
while (strlen($rand) < 32)
$rand .= mt_rand(0, mt_getrandmax());
$rand = $this->hash($rand);
$enc = '';
for ($i = 0; $i < strlen($string); $i++)
$enc .= substr($rand, ($i % strlen($rand)), 1).(substr($rand, ($i % strlen($rand)), 1) ^ substr($string, $i, 1));
return $this->_xor_merge($enc, $key);
// --------------------------------------------------------------------
/**
* XOR Decode
*
* Takes an encoded string and key as input and generates the
* plain-text original message
*
* @access private
* @param string
* @param string
* @return string
*/
function _xor_decode($string, $key)
$string = $this->_xor_merge($string, $key);
$dec = '';
for ($i = 0; $i < strlen($string); $i++)
$dec .= (substr($string, $i++, 1) ^ substr($string, $i, 1));
return $dec;
// --------------------------------------------------------------------
/**
* XOR key + string Combiner
*
* Takes a string and key as input and computes the difference using XOR
*
* @access private
* @param string
* @param string
* @return string
*/
function _xor_merge($string, $key)
$hash = $this->hash($key);
$str = '';
for ($i = 0; $i < strlen($string); $i++)
$str .= substr($string, $i, 1) ^ substr($hash, ($i % strlen($hash)), 1);
return $str;
// --------------------------------------------------------------------
/**
* Encrypt using Mcrypt
*
* @access public
* @param string
* @param string
* @return string
*/
function mcrypt_encode($data, $key)
$init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode());
$init_vect = mcrypt_create_iv($init_size, MCRYPT_RAND);
return $this->_add_cipher_noise($init_vect.mcrypt_encrypt($this->_get_cipher(), $key, $data, $this->_get_mode(), $init_vect), $key);
// --------------------------------------------------------------------
/**
* Decrypt using Mcrypt
*
* @access public
* @param string
* @param string
* @return string
*/
function mcrypt_decode($data, $key)
$data = $this->_remove_cipher_noise($data, $key);
$init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode());
if ($init_size > strlen($data))
return FALSE;
$init_vect = substr($data, 0, $init_size);
$data = substr($data, $init_size);
return rtrim(mcrypt_decrypt($this->_get_cipher(), $key, $data, $this->_get_mode(), $init_vect), "\0");
// --------------------------------------------------------------------
/**
* Adds permuted noise to the IV + encrypted data to protect
* against Man-in-the-middle attacks on CBC mode ciphers
* http://www.ciphersbyritter.com/GLOSSARY.HTM#IV
*
* Function description
*
* @access private
* @param string
* @param string
* @return string
*/
function _add_cipher_noise($data, $key)
$keyhash = $this->hash($key);
$keylen = strlen($keyhash);
$str = '';
for ($i = 0, $j = 0, $len = strlen($data); $i < $len; ++$i, ++$j)
if ($j >= $keylen)
$j = 0;
$str .= chr((ord($data[$i]) + ord($keyhash[$j])) % 256);
return $str;
// --------------------------------------------------------------------
/**
* Removes permuted noise from the IV + encrypted data, reversing
* _add_cipher_noise()
*
* Function description
*
* @access public
* @param type
* @return type
*/
function _remove_cipher_noise($data, $key)
$keyhash = $this->hash($key);
$keylen = strlen($keyhash);
$str = '';
for ($i = 0, $j = 0, $len = strlen($data); $i < $len; ++$i, ++$j)
if ($j >= $keylen)
$j = 0;
$temp = ord($data[$i]) - ord($keyhash[$j]);
if ($temp < 0)
$temp = $temp + 256;
$str .= chr($temp);
return $str;
// --------------------------------------------------------------------
/**
* Set the Mcrypt Cipher
*
* @access public
* @param constant
* @return string
*/
function set_cipher($cipher)
$this->_mcrypt_cipher = $cipher;
// --------------------------------------------------------------------
/**
* Set the Mcrypt Mode
*
* @access public
* @param constant
* @return string
*/
function set_mode($mode)
$this->_mcrypt_mode = $mode;
// --------------------------------------------------------------------
/**
* Get Mcrypt cipher Value
*
* @access private
* @return string
*/
function _get_cipher()
if ($this->_mcrypt_cipher == '')
$this->_mcrypt_cipher = MCRYPT_RIJNDAEL_256;
return $this->_mcrypt_cipher;
// --------------------------------------------------------------------
/**
* Get Mcrypt Mode Value
*
* @access private
* @return string
*/
function _get_mode()
if ($this->_mcrypt_mode == '')
$this->_mcrypt_mode = MCRYPT_MODE_CBC;
return $this->_mcrypt_mode;
// --------------------------------------------------------------------
/**
* Set the Hash type
*
* @access public
* @param string
* @return string
*/
function set_hash($type = 'sha1')
$this->_hash_type = ($type != 'sha1' AND $type != 'md5') ? 'sha1' : $type;
// --------------------------------------------------------------------
/**
* Hash encode a string
*
* @access public
* @param string
* @return string
*/
function hash($str)
return ($this->_hash_type == 'sha1') ? $this->sha1($str) : md5($str);
// --------------------------------------------------------------------
/**
* Generate an SHA1 Hash
*
* @access public
* @param string
* @return string
*/
function sha1($str)
if ( ! function_exists('sha1'))
if ( ! function_exists('mhash'))
require_once(BASEPATH.'libraries/Sha1.php');
$SH = new CI_SHA;
return $SH->generate($str);
else
return bin2hex(mhash(MHASH_SHA1, $str));
else
return sha1($str);
// END CI_Encrypt class
/* End of file Encrypt.php */
【讨论】：
【参考方案10】：使用 php 7 及更高版本的 mcrypt 不需要手动加载，因此这两种解决方案都可以工作。
$this->load->library('encrypt');
改成
$this->load->library('encrypt');
只需从自动加载中删除加密
$autoload['libraries'] = array('database','session','upload','form_validation','encrypt','pagination');
改成
$autoload['libraries'] = array('database','session','upload','form_validation','encrypt','pagination');
【讨论】：
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