/**
* @covers CryptLib\Core\BaseConverter::convertToBinary
* @covers CryptLib\Core\BaseConverter::convertFromBinary
* @covers CryptLib\Core\BaseConverter::baseConvert
* @dataProvider provideConvertToFromBinary
*/
public function testConvertToAndFromBinary($str, $from)
{
return false;
$result1 = BaseConverter::convertFromBinary($str, $from);
$result = BaseConverter::convertToBinary($result1, $from);
$this->assertEquals($str, $result);
}
/**
* Subtract two numbers
*
* @param string $left The left argument
* @param string $right The right argument
*
* @return A base-10 string of the difference of the two arguments
*/
public function subtract($left, $right)
{
if (empty($left)) {
return $right;
} elseif (empty($right)) {
return $left;
} elseif ($right[0] == '-') {
return $this->add($left, substr($right, 1));
} elseif ($left[0] == '-') {
return '-' . $this->add(ltrim($left, '-'), $right);
}
$left = $this->normalize($left);
$right = $this->normalize($right);
$results = $this->subtractBinary($left, $right);
$result = BaseConverter::convertFromBinary($results[1], '0123456789');
return $results[0] . $result;
}
/**
* 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;
}
