AopEncrypt.php
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<?php
/**
* 加密工具类
*
* User: jiehua
* Date: 16/3/30
* Time: 下午3:25
*/
/**
* 加密方法
* @param string $str
* @return string
*/
function encrypt($str,$screct_key){
//AES, 128 模式加密数据 CBC
$screct_key = base64_decode($screct_key);
$str = trim($str);
$str = addPKCS7Padding($str);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_CBC),1);
$encrypt_str = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_CBC);
return base64_encode($encrypt_str);
}
/**
* 解密方法
* @param string $str
* @return string
*/
function decrypt($str,$screct_key){
//AES, 128 模式加密数据 CBC
$str = base64_decode($str);
$screct_key = base64_decode($screct_key);
$iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128,MCRYPT_MODE_CBC),1);
$encrypt_str = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $screct_key, $str, MCRYPT_MODE_CBC);
$encrypt_str = trim($encrypt_str);
$encrypt_str = stripPKSC7Padding($encrypt_str);
return $encrypt_str;
}
/**
* 填充算法
* @param string $source
* @return string
*/
function addPKCS7Padding($source){
$source = trim($source);
$block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
$pad = $block - (strlen($source) % $block);
if ($pad <= $block) {
$char = chr($pad);
$source .= str_repeat($char, $pad);
}
return $source;
}
/**
* 移去填充算法
* @param string $source
* @return string
*/
function stripPKSC7Padding($source){
$source = trim($source);
$char = substr($source, -1);
$num = ord($char);
if($num==62)return $source;
$source = substr($source,0,-$num);
return $source;
}