php常用des加密解密对应java

class des{

    private $key;
    private $iv;

    public function __construct($key, $iv='23456789')
    {
        $this->key = $key;
        $this->iv = $iv;
    }

    function fixUrlSafeEncode($str, $isEncrypt = true)
    {
        $str1 = ['=','/','+'];
        $str2 = ['.','_','-'];

        if (!$isEncrypt)
        {
            list($str1,$str2) = [$str2,$str1];
        }

        return str_replace($str1, $str2, $str);
    }

    function encrypt($input)
    {
        $td = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_ECB, '');
        $input = $this->PaddingPKCS7($input);
        @mcrypt_generic_init($td, $this->key, $this->iv);
        $data = mcrypt_generic($td, $input);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);
        $data = $this->fixUrlSafeEncode(base64_encode($data));
        return $data;
    }

    function decrypt($encrypted)
    {
        $encrypted = $this->fixUrlSafeEncode($encrypted,false);

        $td  = mcrypt_module_open(MCRYPT_3DES, '', MCRYPT_MODE_ECB, '');

        @mcrypt_generic_init($td, $this ->key, $this->iv);

        $encrypted = base64_decode($encrypted);

        $ret = trim(mdecrypt_generic($td, $encrypted));

        $ret = $this->UnPaddingPKCS7($ret);

        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);

        return $ret;
    }

    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('tripledes', MCRYPT_MODE_ECB);
        $padding_char = $block_size - (strlen($data) % $block_size);
        $data .= str_repeat(chr($padding_char), $padding_char);
        return $data;
    }

    function UnPaddingPKCS7($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);
    }
}