/**
* Encrypt the data using the supplied key, cipher
*
* @param string $data The data to encrypt
*
* @return string The encrypted data
*/
protected function encryptBlock($data)
{
$size = $this->cipher->getBlockSize();
$state = str_pad(BaseConverter::convertToBinary($this->state, '0123456789'), $size, chr(0), STR_PAD_LEFT);
$stub = $this->cipher->encryptBlock($state);
$this->state = $this->bigMath->add($this->state, 1);
return $stub ^ $data;
}
/**
* Transform a string number into a binary string using base autodetection
*
* @param string $string The string to transform
*
* @return string The binary transformed number
*/
protected function normalize($string)
{
return BaseConverter::convertToBinary($string, '0123456789');
}
/**
* Generate a random string of specified length.
*
* This uses the supplied character list for generating the new result
* string.
*
* @param int $length The length of the generated string
* @param string $characters An optional list of characters to use
*
* @return string The generated random string
*/
public function generateString($length, $characters = '')
{
if ($length == 0 || strlen($characters) == 1) {
return '';
} elseif (empty($characters)) {
// Default to base 64
$characters = '0123456789abcdefghijklmnopqrstuvwxyz' . 'ABCDEFGHIJKLMNOPQRSTUVWXYZ./';
}
//determine how many bytes to generate
$bytes = ceil($length * floor(log(strlen($characters), 2) + 1.01) / 8);
$rand = $this->generate($bytes);
$result = BaseConverter::convertFromBinary($rand, $characters);
if (strlen($result) < $length) {
$result = str_pad($result, $length, $characters[0], STR_PAD_LEFT);
} else {
$result = substr($result, 0, $length);
}
return $result;
}
/**
* @covers CryptLib\Core\BaseConverter::baseConvert
* @expectedException InvalidArgumentException
*/
public function testBaseConvertFailure()
{
BaseConverter::baseConvert(array(1), 1, 1);
}
