<?php
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
$td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
if ($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);
$data = bin2hex($data);//如需转换二进制可改成 bin2hex 转换
return $data;
}
function decrypt($encrypted)
{
$encrypted = hex2bin($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
$td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');//3DES加密将MCRYPT_DES改为MCRYPT_3DES
if ($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;
}
}
?>
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