public static function encrypt($keyString, $value)
{
$origKey = $keyString;
if (strlen($keyString) > 32) {
$keyString = substr($keyString, 0, 32);
}
if (strlen($keyString) < 32) {
$keyString = str_pad($keyString, 32, 'X');
}
$cipher = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
$iv = TPSecurityUtils::genRandomString(16);
if (mcrypt_generic_init($cipher, $keyString, $iv) != -1) {
$blockSize = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$padding = $blockSize - strlen($value) % $blockSize;
$value .= str_repeat(chr($padding), $padding);
// PHP pads with NULL bytes if $value is not a multiple of the block size..
$cipherText = mcrypt_generic($cipher, $value);
mcrypt_generic_deinit($cipher);
mcrypt_module_close($cipher);
$safe = TPSecurityUtils::urlensafe($cipherText);
return $safe . TPSecurityUtils::DELIM . TPSecurityUtils::hashHmacSha256($origKey, $safe);
}
$safe = TPSecurityUtils::urlensafe($value);
return $safe . TPSecurityUtils::DELIM . TPSecurityUtils::hashHmacSha256($origKey, $safe);
}
