des加密方式cbc模式加密案例

<?php
class aazdes {
 
    private static $_instance = NULL;
    /**
     * @return aazdes
     */
    public static function share() {
        if (is_null(self::$_instance)) {
            self::$_instance = new aazdes();
        }
        return self::$_instance;
    }
    /**
     * 加密解密
     * @param string $strText 要处理的字符串
     * @param string $isEncrypt true=加密 false=解密
     * @return string
     */
	public function mycode($strText, $isEncrypt=true) {
		//string aa, bb, cc, dd, kk;
		$cc='';
		$kk = (8 * 101 * 100000 + 4 * 11 * 1000 + 3 * 7 * 8).'';
		if ($isEncrypt) {
			$aa = $this->encode($strText, $kk);
			$dd='';
			for($ii=0;$ii<16;$ii++){
				$dd.=$aa[rand(0, 15)];
			}
			$cc = substr($dd,8, 4) . substr($aa,0, 4) . substr($dd,0, 4) . substr($aa,4, 8) . substr($dd,12, 4) . substr($aa,12) . substr($dd,4, 4);
		} else {
			$aa = $strText;
			$bb = substr($aa,4, 4) . substr($aa,12, 8) . substr($aa,24, strlen($aa) - 24 - 4);
			$cc = $this->decode($bb, $kk);
		}
		return $cc;
	}

    /**
     * 加密
     * @param string $str 要处理的字符串
     * @param string $key 加密Key，为8个字节长度
     * @return string
     */
    public function encode($str, $key, $tobase64=false) {
        $size = mcrypt_get_block_size(MCRYPT_DES, MCRYPT_MODE_CBC);//MCRYPT_MODE_CBC
        $str = $this->pkcs5Pad($str, $size);
        $aaa = mcrypt_cbc(MCRYPT_DES, $key, $str, MCRYPT_ENCRYPT, $key);
		if($tobase64){
			$ret = base64_encode($aaa);
		}else{//密文以十六进制显示
			$ret =strtoupper(bin2hex($aaa));
		}
        return $ret;
    }
 
    /**
     * 解密
     * @param string $str 要处理的字符串
     * @param string $key 解密Key，为8个字节长度
     * @return string
     */
    public function decode($str, $key, $tobase64=false) {
		if($tobase64){
			$strBin = base64_decode($str);
		}else{//密文以十六进制显示的
			$strBin = hex2bin($str);
		}
        $str = mcrypt_cbc(MCRYPT_DES, $key, $strBin, MCRYPT_DECRYPT, $key);
        $str = $this->pkcs5Unpad($str);
        return $str;
    }

    function hex2bin($hexData) {
        $binData = "";
		$imax=strlen($hexData)/2;
        for ($i = 0; $i < $imax; $i += 2) {
            $binData .= chr(hexdec(substr($hexData, $i, 2)));
        }
        return $binData;
    }
 
    function pkcs5Pad($text, $blocksize) {
        $pad = $blocksize - (strlen($text) % $blocksize);
        return $text . str_repeat(chr($pad), $pad);
    }
 
    function pkcs5Unpad($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);
    }

	public function getSubString($strfull, $strhead, $strfoot='') {
		$pos1=0;
		$pos2=0;
		$result = "";
		$pos1 = strpos($strfull,$strhead);
		if ($pos1 !== false) {
			if($strfoot==''){
				$result = substr($strfull,$pos1 + strlen($strhead));
			}else{
				$pos2 = strpos($strfull,$strfoot, $pos1 + strlen($strhead));
				if ($pos2 !== false) {
					$result = substr($strfull,$pos1 + strlen($strhead), $pos2 - $pos1 - strlen($strhead));
				}
			}
		}
		return $result;
	}

	public function gbk2utf($str){
		return iconv("GBK", "UTF-8", $str);
	}
	public function utf2gbk($str){
		return iconv("UTF-8", "GBK", $str);
	}

}
?>

<?php
date_default_timezone_set("Asia/Shanghai");
//引用、定义
define('ABS_PATH', dirname(__FILE__).DIRECTORY_SEPARATOR);
include(ABS_PATH.'aazdes.class.php');
$des = new aazdes();
echo '  <meta charset="UTF-8">';

//构造要发送的数据
$url='http://domain.url?message=';
$username=$des->mycode("czy001",true);
$pass=$des->mycode("123456",true);
$data=[
	"username"=>$username,
	"password"=>$pass
];
$message=[
"action"=>"login",
"token"=>"TOKEN",
"session"=>"",
"deviceid"=>"",
"message"=>json_encode($data)
];
echo '<hr>要发送的数据：';
print_r($message);
//加密
$message= $des->mycode(json_encode($message),true);

//发送到服务器并返回结果
$_GET['message']=getCurl( $url . base64_encode($message));

//解密数据
$retmessage=isset($_GET['message'])? base64_decode($_GET['message']) : '';
$retmessage= $des->mycode($retmessage,false);//解密
$retmessage=$des->gbk2utf($retmessage);
$data=json_decode($retmessage,true);//true参数强制转为数组 $data['username'] ，否则变为对象 $data->username
//输出结果
echo '<hr>返回的数据：';
print_r($data);



 function getCurl( $url, $second = 30)    {
	$ch = curl_init();
	// 设置超时
	curl_setopt($ch, CURLOPT_TIMEOUT, $second);
	curl_setopt($ch, CURLOPT_URL, $url);
	curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
	curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); //严格校验
	// 设置header
	curl_setopt($ch, CURLOPT_HEADER, false);
	// 要求结果为字符串且输出到屏幕上
	curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
	// post提交方式
	curl_setopt($ch, CURLOPT_POST, false);
	//curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
	// 运行curl
	$data = curl_exec($ch);
	curl_close($ch);
	return $data;
}