Re: PKCS#5 padding

On 12/9/05, Binay(Local) <binay@oliveinternet.com> wrote: > Hi All > > Has anybody got the working code to apply the PKCS#5 padding to the text for encryption. Please > let me know as it seems PHP inbuilt functions do not support this padding at all. Been worried about > from past 2 days. Help me out. The pad function simply returns the text padded to the blocksize. The unpad function returns the unpadded text, or false if the padding isn't valid. 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) - $pad)) return false; return substr($text, 0, -1 * $pad); }