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PHP实现的DES加密解密封装类完整实例

更新时间:2020-03-19 16:10:30 作者:startmvc
本文实例讲述了PHP实现的DES加密解密封装类。分享给大家供大家参考,具体如下:<?php

本文实例讲述了PHP实现的DES加密解密封装类。分享给大家供大家参考,具体如下:


<?php
/**
* PHP版DES加解密类
* 可与java的DES(DESede/CBC/PKCS5Padding)加密方式兼容
*
*/
class CryptDes {
 var $key;
 var $iv;
 function CryptDes($key, $iv){
 $this->key = $key;
 $this->iv = $iv;
 }
 function encrypt($input){
 $size = mcrypt_get_block_size(MCRYPT_DES,MCRYPT_MODE_CBC); //3DES加密将MCRYPT_DES改为MCRYPT_3DES
 $input = $this->pkcs5_pad($input, $size); //如果采用PaddingPKCS7,请更换成PaddingPKCS7方法。
 $key = str_pad($this->key,8,'0'); //3DES加密将8改为24
 $td = mcrypt_module_open(MCRYPT_DES, '', MCRYPT_MODE_CBC, '');
 if( $this->iv == '' )
 {
 $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
 }
 else
 {
 $iv = $this->iv;
 }
 @mcrypt_generic_init($td, $key, $iv);
 $data = mcrypt_generic($td, $input);
 mcrypt_generic_deinit($td);
 mcrypt_module_close($td);
 $data = base64_encode($data);//如需转换二进制可改成 bin2hex 转换
 return $data;
 }
 function decrypt($encrypted){
 $encrypted = base64_decode($encrypted); //如需转换二进制可改成 bin2hex 转换
 $key = str_pad($this->key,8,'0'); //3DES加密将8改为24
 $td = mcrypt_module_open(MCRYPT_DES,'',MCRYPT_MODE_CBC,'');//3DES加密将MCRYPT_DES改为MCRYPT_3DES
 if( $this->iv == '' )
 {
 $iv = @mcrypt_create_iv (mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
 }
 else
 {
 $iv = $this->iv;
 }
 $ks = mcrypt_enc_get_key_size($td);
 @mcrypt_generic_init($td, $key, $iv);
 $decrypted = mdecrypt_generic($td, $encrypted);
 mcrypt_generic_deinit($td);
 mcrypt_module_close($td);
 $y=$this->pkcs5_unpad($decrypted);
 return $y;
 }
 function pkcs5_pad ($text, $blocksize) {
 $pad = $blocksize - (strlen($text) % $blocksize);
 return $text . str_repeat(chr($pad), $pad);
 }
 function pkcs5_unpad($text){
 $pad = ord($text{strlen($text)-1});
 if ($pad > strlen($text)) {
 return false;
 }
 if (strspn($text, chr($pad), strlen($text) - $pad) != $pad){
 return false;
 }
 return substr($text, 0, -1 * $pad);
 }
 function PaddingPKCS7($data) {
 $block_size = mcrypt_get_block_size(MCRYPT_DES, MCRYPT_MODE_CBC);//3DES加密将MCRYPT_DES改为MCRYPT_3DES
 $padding_char = $block_size - (strlen($data) % $block_size);
 $data .= str_repeat(chr($padding_char),$padding_char);
 return $data;
 }
}
$des = new CryptDes("12345678","12345678");//(秘钥向量,混淆向量)
echo $ret = $des->encrypt("1111");//加密字符串
?>

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PHP DES 加密解密 封装类