介绍
介绍
福哥需要在php里使用PKCS7编码功能，今天整理出来和大家分享一下
教程
PKCS7编码对象
PKCS7编码对象
class PKCS7Encoder{
const BLOCK_SIZE = 32;
function encode($text){
$text_length = strlen($text);
$amount_to_pad = PKCS7Encoder::BLOCK_SIZE - ($text_length % PKCS7Encoder::BLOCK_SIZE);
if($amount_to_pad == 0){
$amount_to_pad = PKCS7Encoder::BLOCK_SIZE;
}
$pad_chr = chr($amount_to_pad);
$tmp = "";
for($index = 0; $index < $amount_to_pad; $index++){
$tmp .= $pad_chr;
}
return $text . $tmp;
}
function decode($text){
$pad = ord(substr($text, -1));
if($pad < 1 || $pad > PKCS7Encoder::BLOCK_SIZE){
$pad = 0;
}
return substr($text, 0, (strlen($text) - $pad));
}
}