今天写App接口的时候需要传递加密数据给APP端，于是就写了下面的DES加密类，亲测正确代码如下
class CryptDes {
function __construct(){
$this->key = 'codelovers'; //密钥
$this->iv = '15548632'; //偏移量
}
/*
* 加密
*/
function encrypt($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 $data;
}
/*
* 解密
*/
function decrypt($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;
}
}
具体用法如下：
$str = 'www.codelovers.cn'; $des = new CryptDes();
$mres = $this->_des->encrypt($str); //加密
$jres = $this->_des->decrypt($mres);//解密
原文地址:http://www.codelovers.cn/article/20180625155919.html