PHP Mcrypt Encrypt Decrypt Sample

Replace your-own $key value.

[code language="php"]

function encrypt($text) {
$key = '6wMwDU8rvMms6ZrY';// 24 bit Key
$iv = "fYfhHeDm";// 8 bit IV
$bit_check=8;// bit amount for diff algor.

$text_num =str_split($text,$bit_check);
$text_num = $bit_check-strlen($text_num[count($text_num)-1]);
for ($i=0;$i<$text_num; $i++) {$text = $text . chr($text_num);}
$cipher = mcrypt_module_open(MCRYPT_TRIPLEDES,'','cbc','');
mcrypt_generic_init($cipher, $key, $iv);
$decrypted = mcrypt_generic($cipher,$text);
mcrypt_generic_deinit($cipher);
return base64_encode($decrypted);
}

function decrypt($encrypted_text){
$key = '6wMwDU8rvMms6ZrY';// 24 bit Key
$iv = "fYfhHeDm";// 8 bit IV
$bit_check=8;// bit amount for diff algor.

$cipher = mcrypt_module_open(MCRYPT_TRIPLEDES,'','cbc','');
mcrypt_generic_init($cipher, $key, $iv);
$decrypted = mdecrypt_generic($cipher,base64_decode($encrypted_text));
mcrypt_generic_deinit($cipher);
$last_char=substr($decrypted,-1);
for($i=0;$i<$bit_check-1; $i++){
if(chr($i)==$last_char){
$decrypted=substr($decrypted,0,strlen($decrypted)-$i);
break;
}
}
return $decrypted;
}

[/code]

 

[code language="php"]

$userid_dec = str_replace("\x0", '', $userid_dec); //패딩제거
$userid_dec = str_replace("\x7", '', $userid_dec); //패딩제거

[/code]

$key = '12345678901234567890123456789012';
$iv = '1234567890123456';
$input = "student";

$td = mcrypt_module_open('rijndael-128', '', 'cbc', '');

mcrypt_generic_init($td, $key, $iv);
$encrypted_data = mcrypt_generic($td, $input);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);

echo base64_encode($encrypted_data);