字符串加密解密算法

 php5.5中有更爲可靠和方便的加密方式。喜歡鑽研的朋友能夠了解一下：

 password_hash()

http://www.php.net/manual/zh/function.password-hash.php

基於mcrypt擴展，按位異或總結的兩個字符串加密解密算法

<?php
/**
 * @info 字符串加密解密算法一,利用mcrypt擴展
 * @param string $string 待處理字符串
 *        $action ENCODE,加密 | DECODE，解密
 * @return string $returnstr
 * @date 2014/4/22
 * @author tonglei
 */

function mcrypt_handle_string($string, $action = 'ENCODE')
{
        !is_array($string) or exit;
        $action == 'DECODE' && $string = base64_decode($string);
        $key = "123456"; //key可自定義或在配置文件中獲取
        $mcryptAlgorithm = MCRYPT_DES; //選擇一種加密算法
        $mcryptMode = MCRYPT_MODE_ECB; //選擇一種加密模式
        $mcryptIv = mcrypt_create_iv(mcrypt_get_iv_size($mcryptAlgorithm, $mcryptMode),
                MCRYPT_RAND); //建立初始化向量

        $returnstr = base64_encode(mcrypt_encrypt($mcryptAlgorithm, $key, $string, $mcryptMode,
                $mcryptIv));
        if('DECODE' == $action)
        {
                $returnstr = mcrypt_decrypt($mcryptAlgorithm, $key, $string, $mcryptMode, $mcryptIv);
        }
        return $returnstr;

}

 

<?php
/**
 *
 * @info 字符串加密解密算法二 利用按位異或
 * @param string $string 待處理字符串
 * @param $action ENCODE 加密 | DECODE 解密
 * @return string
 */
function StrCode($string, $action = 'ENCODE')
{
        $action != 'ENCODE' && $string = base64_decode($string);
        $code = '';
        $key = substr(md5($GLOBALS['pwServer']['HTTP_USER_AGENT'] . $GLOBALS['db_hash']),
                8, 18);
        $keyLen = strlen($key);
        $strLen = strlen($string);
        for ($i = 0; $i < $strLen; $i++)
        {
                $k = $i % $keyLen;
                $code .= $string[$i] ^ $key[$k];
        }
        return ($action != 'DECODE' ? base64_encode($code) : $code);
}