Vergleich inc/3rdparty/2fa/GoogleAuthenticator.php - 1.8.10 - 1.8.11

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<?php

/**

<?php

/**

 * PHP Class for handling Google Authenticator 2-factor authentication

 * PHP Class for handling Google Authenticator 2-factor authentication.

 *
* @author Michael Kliewe
* @copyright 2012 Michael Kliewe
* @license http://www.opensource.org/licenses/bsd-license.php BSD License

 *
* @author Michael Kliewe
* @copyright 2012 Michael Kliewe
* @license http://www.opensource.org/licenses/bsd-license.php BSD License

 
 *

 * @link http://www.phpgangsta.de/
*/

 * @link http://www.phpgangsta.de/
*/



 
class PHPGangsta_GoogleAuthenticator
{
protected $_codeLength = 6;

class PHPGangsta_GoogleAuthenticator
{
protected $_codeLength = 6;

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     * 16 characters, randomly chosen from the allowed base32 characters.
*
* @param int $secretLength

     * 16 characters, randomly chosen from the allowed base32 characters.
*
* @param int $secretLength

 
     *

     * @return string
*/
public function createSecret($secretLength = 16)
{
$validChars = $this->_getBase32LookupTable();

     * @return string
*/
public function createSecret($secretLength = 16)
{
$validChars = $this->_getBase32LookupTable();

        unset($validChars[32]);

 




 
        // Valid secret lengths are 80 to 640 bits
if ($secretLength < 16 || $secretLength > 128) {
throw new Exception('Bad secret length');
}

        $secret = '';

        $secret = '';

        for ($i = 0; $i < $secretLength; $i++) {
$secret .= $validChars[array_rand($validChars)];









        $rnd = false;
if (function_exists('random_bytes')) {
$rnd = random_bytes($secretLength);
} elseif (function_exists('mcrypt_create_iv')) {
$rnd = mcrypt_create_iv($secretLength, MCRYPT_DEV_URANDOM);
} elseif (function_exists('openssl_random_pseudo_bytes')) {
$rnd = openssl_random_pseudo_bytes($secretLength, $cryptoStrong);
if (!$cryptoStrong) {
$rnd = false;
}

        }

        }

 
        if ($rnd !== false) {
for ($i = 0; $i < $secretLength; ++$i) {
$secret .= $validChars[ord($rnd[$i]) & 31];
}
} else {
throw new Exception('No source of secure random');
}


        return $secret;
}

/**

        return $secret;
}

/**

     * Calculate the code, with given secret and point in time

     * Calculate the code, with given secret and point in time.

     *

     *

     * @param string $secret

     * @param string   $secret

     * @param int|null $timeSlice

     * @param int|null $timeSlice

 
     *

     * @return string
*/
public function getCode($secret, $timeSlice = null)

     * @return string
*/
public function getCode($secret, $timeSlice = null)

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        $value = $value & 0x7FFFFFFF;

$modulo = pow(10, $this->_codeLength);

        $value = $value & 0x7FFFFFFF;

$modulo = pow(10, $this->_codeLength);

 


        return str_pad($value % $modulo, $this->_codeLength, '0', STR_PAD_LEFT);
}

/**

        return str_pad($value % $modulo, $this->_codeLength, '0', STR_PAD_LEFT);
}

/**

     * Get QR-Code URL for image, from google charts

     * Get QR-Code URL for image, from google charts.

     *
* @param string $name
* @param string $secret
* @param string $title

     *
* @param string $name
* @param string $secret
* @param string $title

 
     * @param array  $params
*

     * @return string
*/

     * @return string
*/

    public function getQRCodeGoogleUrl($name, $secret, $title = null) {






    public function getQRCodeGoogleUrl($name, $secret, $title = null, $params = array())
{
$width = !empty($params['width']) && (int) $params['width'] > 0 ? (int) $params['width'] : 200;
$height = !empty($params['height']) && (int) $params['height'] > 0 ? (int) $params['height'] : 200;
$level = !empty($params['level']) && array_search($params['level'], array('L', 'M', 'Q', 'H')) !== false ? $params['level'] : 'M';


        $urlencoded = urlencode('otpauth://totp/'.$name.'?secret='.$secret.'');

        $urlencoded = urlencode('otpauth://totp/'.$name.'?secret='.$secret.'');

	if(isset($title)) {
$urlencoded .= urlencode('&issuer='.urlencode($title));

        if (isset($title)) {
$urlencoded .= urlencode('&issuer='.urlencode($title));

        }

        }

        return 'https://chart.googleapis.com/chart?chs=200x200&chld=M|0&cht=qr&chl='.$urlencoded.'';



return 'https://chart.googleapis.com/chart?chs='.$width.'x'.$height.'&chld='.$level.'|0&cht=qr&chl='.$urlencoded.'';

    }

/**

    }

/**

     * Check if the code is correct. This will accept codes starting from $discrepancy*30sec ago to $discrepancy*30sec from now

     * Check if the code is correct. This will accept codes starting from $discrepancy*30sec ago to $discrepancy*30sec from now.

     *

     *

     * @param string $secret
* @param string $code
* @param int $discrepancy This is the allowed time drift in 30 second units (8 means 4 minutes before or after)

     * @param string   $secret
* @param string $code
* @param int $discrepancy This is the allowed time drift in 30 second units (8 means 4 minutes before or after)

     * @param int|null $currentTimeSlice time slice if we want use other that time()

     * @param int|null $currentTimeSlice time slice if we want use other that time()

 
     *

     * @return bool
*/
public function verifyCode($secret, $code, $discrepancy = 1, $currentTimeSlice = null)

     * @return bool
*/
public function verifyCode($secret, $code, $discrepancy = 1, $currentTimeSlice = null)

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            $currentTimeSlice = floor(time() / 30);
}


            $currentTimeSlice = floor(time() / 30);
}


        for ($i = -$discrepancy; $i <= $discrepancy; $i++) {





        if (strlen($code) != 6) {
return false;
}

for ($i = -$discrepancy; $i <= $discrepancy; ++$i) {

            $calculatedCode = $this->getCode($secret, $currentTimeSlice + $i);

            $calculatedCode = $this->getCode($secret, $currentTimeSlice + $i);

            if ($calculatedCode == $code ) {

            if ($this->timingSafeEquals($calculatedCode, $code)) {

                return true;
}
}

                return true;
}
}

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    }

/**

    }

/**

     * Set the code length, should be >=6

     * Set the code length, should be >=6.

     *
* @param int $length

     *
* @param int $length

 
     *

     * @return PHPGangsta_GoogleAuthenticator
*/
public function setCodeLength($length)
{
$this->_codeLength = $length;

     * @return PHPGangsta_GoogleAuthenticator
*/
public function setCodeLength($length)
{
$this->_codeLength = $length;

 


        return $this;
}

/**

        return $this;
}

/**

     * Helper class to decode base32

     * Helper class to decode base32.

     *
* @param $secret

     *
* @param $secret

 
     *

     * @return bool|string
*/
protected function _base32Decode($secret)
{

     * @return bool|string
*/
protected function _base32Decode($secret)
{

        if (empty($secret)) return '';



        if (empty($secret)) {
return '';
}


$base32chars = $this->_getBase32LookupTable();
$base32charsFlipped = array_flip($base32chars);

$paddingCharCount = substr_count($secret, $base32chars[32]);
$allowedValues = array(6, 4, 3, 1, 0);


$base32chars = $this->_getBase32LookupTable();
$base32charsFlipped = array_flip($base32chars);

$paddingCharCount = substr_count($secret, $base32chars[32]);
$allowedValues = array(6, 4, 3, 1, 0);

        if (!in_array($paddingCharCount, $allowedValues)) return false;
for ($i = 0; $i < 4; $i++){



        if (!in_array($paddingCharCount, $allowedValues)) {
return false;
}
for ($i = 0; $i < 4; ++$i) {

            if ($paddingCharCount == $allowedValues[$i] &&

            if ($paddingCharCount == $allowedValues[$i] &&

                substr($secret, -($allowedValues[$i])) != str_repeat($base32chars[32], $allowedValues[$i])) return false;



                substr($secret, -($allowedValues[$i])) != str_repeat($base32chars[32], $allowedValues[$i])) {
return false;
}

        }

        }

        $secret = str_replace('=','', $secret);

        $secret = str_replace('=', '', $secret);

        $secret = str_split($secret);

        $secret = str_split($secret);

        $binaryString = "";
for ($i = 0; $i < count($secret); $i = $i+8) {
$x = "";
if (!in_array($secret[$i], $base32chars)) return false;
for ($j = 0; $j < 8; $j++) {



        $binaryString = '';
for ($i = 0; $i < count($secret); $i = $i + 8) {
$x = '';
if (!in_array($secret[$i], $base32chars)) {
return false;
}
for ($j = 0; $j < 8; ++$j) {

                $x .= str_pad(base_convert(@$base32charsFlipped[@$secret[$i + $j]], 10, 2), 5, '0', STR_PAD_LEFT);
}
$eightBits = str_split($x, 8);

                $x .= str_pad(base_convert(@$base32charsFlipped[@$secret[$i + $j]], 10, 2), 5, '0', STR_PAD_LEFT);
}
$eightBits = str_split($x, 8);

            for ($z = 0; $z < count($eightBits); $z++) {
$binaryString .= ( ($y = chr(base_convert($eightBits[$z], 2, 10))) || ord($y) == 48 ) ? $y:"";

            for ($z = 0; $z < count($eightBits); ++$z) {
$binaryString .= (($y = chr(base_convert($eightBits[$z], 2, 10))) || ord($y) == 48) ? $y : '';

            }
}

            }
}

 


        return $binaryString;
}

/**

        return $binaryString;
}

/**

     * Helper class to encode base32
*
* @param string $secret
* @param bool $padding
* @return string
*/
protected function _base32Encode($secret, $padding = true)
{
if (empty($secret)) return '';

$base32chars = $this->_getBase32LookupTable();

$secret = str_split($secret);
$binaryString = "";
for ($i = 0; $i < count($secret); $i++) {
$binaryString .= str_pad(base_convert(ord($secret[$i]), 10, 2), 8, '0', STR_PAD_LEFT);
}
$fiveBitBinaryArray = str_split($binaryString, 5);
$base32 = "";
$i = 0;
while ($i < count($fiveBitBinaryArray)) {
$base32 .= $base32chars[base_convert(str_pad($fiveBitBinaryArray[$i], 5, '0'), 2, 10)];
$i++;
}
if ($padding && ($x = strlen($binaryString) % 40) != 0) {
if ($x == 8) $base32 .= str_repeat($base32chars[32], 6);
elseif ($x == 16) $base32 .= str_repeat($base32chars[32], 4);
elseif ($x == 24) $base32 .= str_repeat($base32chars[32], 3);
elseif ($x == 32) $base32 .= $base32chars[32];
}
return $base32;
}

/**
* Get array with all 32 characters for decoding from/encoding to base32

     * Get array with all 32 characters for decoding from/encoding to base32.



































     *
* @return array
*/

     *
* @return array
*/

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            'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', // 15
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', // 23
'Y', 'Z', '2', '3', '4', '5', '6', '7', // 31

            'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', // 15
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', // 23
'Y', 'Z', '2', '3', '4', '5', '6', '7', // 31

            '='  // padding char

            '=',  // padding char

        );

        );

 
    }

/**
* A timing safe equals comparison
* more info here: http://blog.ircmaxell.com/2014/11/its-all-about-time.html.
*
* @param string $safeString The internal (safe) value to be checked
* @param string $userString The user submitted (unsafe) value
*
* @return bool True if the two strings are identical
*/
private function timingSafeEquals($safeString, $userString)
{
if (function_exists('hash_equals')) {
return hash_equals($safeString, $userString);
}
$safeLen = strlen($safeString);
$userLen = strlen($userString);

if ($userLen != $safeLen) {
return false;
}

$result = 0;

for ($i = 0; $i < $userLen; ++$i) {
$result |= (ord($safeString[$i]) ^ ord($userString[$i]));
}

// They are only identical strings if $result is exactly 0...
return $result === 0;

    }
}

    }
}