/**
* Generate a random password
*
* @param integer $length Length of the password to generate
*
* @return string Random Password
*
* @since 11.1
*/
public static function genRandomPassword($length = 8)
{
$salt = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
$base = strlen($salt);
$makepass = '';
/*
* Start with a cryptographic strength random string, then convert it to
* a string with the numeric base of the salt.
* Shift the base conversion on each character so the character
* distribution is even, and randomize the start shift so it's not
* predictable.
*/
$random = Crypt::genRandomBytes($length + 1);
$shift = ord($random[0]);
for ($i = 1; $i <= $length; ++$i) {
$makepass .= $salt[($shift + ord($random[$i])) % $base];
$shift += ord($random[$i]);
}
return $makepass;
}
/**
* Test...
*
* @covers Joomla\Crypt\Crypt::genRandomBytes
*
* @return void
*/
public function testGenRandomBytes()
{
// We're just testing wether the value has the expected length.
// We obviously can't test the result since it's random.
$randomBytes16 = Crypt::genRandomBytes();
$this->assertEquals(strlen($randomBytes16), 16);
$randomBytes8 = Crypt::genRandomBytes(8);
$this->assertEquals(strlen($randomBytes8), 8);
$randomBytes17 = Crypt::genRandomBytes(17);
$this->assertEquals(strlen($randomBytes17), 17);
}
/**
* Test...
*
* @covers Joomla\Crypt\Crypt::setKey
*
* @return void
*/
public function testSetKey()
{
$keyMock = $this->getMock('Joomla\\Crypt\\Key', array(), array('simple'));
$this->object->setKey($keyMock);
$this->assertAttributeEquals($keyMock, 'key', $this->object);
}
/**
* Generates a salt of specified length. The salt consists of characters in the set [./0-9A-Za-z].
*
* @param integer $length The number of characters to return.
*
* @return string The string of random characters.
*
* @since 1.0
*/
protected function getSalt($length)
{
$bytes = ceil($length * 6 / 8);
$randomData = str_replace('+', '.', base64_encode(Crypt::genRandomBytes($bytes)));
return substr($randomData, 0, $length);
}
