/**
* 将元数据进行补位后进行3DES加密
* <p/>
* 补位后 byte[] = 描述有效数据长度(int)的byte[]+原始数据byte[]+补位byte[]
*
* @param
* sourceData 元数据字符串
*
* @return 返回3DES加密后的16进制表示的字符串
*/
public static function encrypt2HexStr($keys, $sourceData)
{
$source = array();
// 元数据
$source = ByteUtils::getBytes($sourceData);
// 1.原数据byte长度
$merchantData = count($source);
// echo "原数据据:" . $sourceData . "\n";
// echo "原数据byte长度:" . $merchantData . "\n";
// echo "原数据HEX表示:" . ByteUtils::bytesToHex ( $source ) . "\n";
// 2.计算补位
$x = ($merchantData + 4) % 8;
$y = $x == 0 ? 0 : 8 - $x;
// echo ("需要补位 :" . $y . "\n");
// 3.将有效数据长度byte[]添加到原始byte数组的头部
$sizeByte = ByteUtils::integerToBytes($merchantData);
$resultByte = array();
for ($i = 0; $i < 4; $i++) {
$resultByte[$i] = $sizeByte[$i];
}
//var_dump($sizeByte);
// 4.填充补位数据
for ($j = 0; $j < $merchantData; $j++) {
$resultByte[4 + $j] = $source[$j];
}
//var_dump($resultByte);
for ($k = 0; $k < $y; $k++) {
$resultByte[$merchantData + 4 + $k] = 0x0;
}
//var_dump($resultByte);
//echo ("补位后的byte数组长度:" . count ( $resultByte ) . "\n");
//echo ("补位后数据HEX表示:" . ByteUtils::bytesToHex ( $resultByte ) . "\n");
//echo ("秘钥HEX表示:" . ByteUtils::strToHex ( $keys ) . "\n");
//echo ("秘钥长度:" . count ( ByteUtils::getBytes ( $keys ) ) . "\n");
//echo ByteUtils::toStr ( $resultByte );
$desdata = TDESUtil::encrypt(ByteUtils::toStr($resultByte), $keys);
//echo ("加密后的长度:" . strlen ( $desdata ) . "\n");
return ByteUtils::strToHex($desdata);
}
