Vergleich inc/3rdparty/2fa/GoogleAuthenticator.php - 1.8.7 - 1.8.20

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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;





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

 
    /**
     * Create new secret.
     * 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
     *
     * @param string $secret

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

    {

    {

        if ($currentTimeSlice === null) {
            $currentTimeSlice = floor(time() / 30);

 
        if ($currentTimeSlice === null) {
            $currentTimeSlice = floor(time() / 30);

        }





        }

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



 


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

        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)

 
     * @return PHPGangsta_GoogleAuthenticator
     */
    public function setCodeLength($length)

    {

    {

        $this->_codeLength = $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;
        }
        $secret = str_replace('=','', $secret);



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

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

            }

            }

            $eightBits = str_split($x, 8);

 
            $eightBits = str_split($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
     */
    protected function _getBase32LookupTable()

 
     *
     * @return array
     */
    protected function _getBase32LookupTable()

    {

    {

        return array(
            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', //  7
            '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

 
        return array(
            'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', //  7
            '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;

    }
}

    }
}