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core
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Lib
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GoogleAuthenticator.php
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<?php namespace App\Lib; class GoogleAuthenticator { protected $_codeLength = 6; public function createSecret($secretLength = 16) { $validChars = $this->_getBase32LookupTable(); // Valid secret lengths are 80 to 640 bits if ($secretLength < 16 || $secretLength > 128) { throw new Exception('Bad secret length'); } $secret = ''; $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 $secret; } public function getCode($secret, $timeSlice = null) { if ($timeSlice === null) { $timeSlice = floor(time() / 30); } $secretkey = $this->_base32Decode($secret); // Pack time into binary string $time = chr(0) . chr(0) . chr(0) . chr(0) . pack('N*', $timeSlice); // Hash it with users secret key $hm = hash_hmac('SHA1', $time, $secretkey, true); // Use last nipple of result as index/offset $offset = ord(substr($hm, -1)) & 0x0F; // grab 4 bytes of the result $hashpart = substr($hm, $offset, 4); // Unpak binary value $value = unpack('N', $hashpart); $value = $value[1]; // Only 32 bits $value = $value & 0x7FFFFFFF; $modulo = pow(10, $this->_codeLength); return str_pad($value % $modulo, $this->_codeLength, '0', STR_PAD_LEFT); } /** * Get QR-Code URL for image, from google charts. * * @param string $name * @param string $secret * @param string $title * @param array $params * * @return string */ public function getQRCodeGoogleUrl($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=' . $secret . ''); if (isset($title)) { $urlencoded .= urlencode('&issuer=' . urlencode($title)); } return 'https://chart.googleapis.com/chart?chs=' . $width . 'x' . $height . '&chld=' . $level . '|0&cht=qr&chl=' . $urlencoded . ''; } public function verifyCode($secret, $code, $discrepancy = 1, $currentTimeSlice = null) { if ($currentTimeSlice === null) { $currentTimeSlice = floor(time() / 30); } if (strlen($code) != 6) { return false; } for ($i = -$discrepancy; $i <= $discrepancy; ++$i) { $calculatedCode = $this->getCode($secret, $currentTimeSlice + $i); if ($this->timingSafeEquals($calculatedCode, $code)) { return true; } } return false; } public function setCodeLength($length) { $this->_codeLength = $length; return $this; } protected function _base32Decode($secret) { if (empty($secret)) { return ''; } $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 ( $paddingCharCount == $allowedValues[$i] && substr($secret, -($allowedValues[$i])) != str_repeat($base32chars[32], $allowedValues[$i]) ) { return false; } } $secret = str_replace('=', '', $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) { $x .= str_pad(base_convert(@$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 : ''; } } return $binaryString; } protected function _getBase32LookupTable() { return array( 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', // 7 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', // 15 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', // 23 'Y', 'Z', '2', '3', '4', '5', '6', '7', // 31 '=', // padding char ); } private function timingSafeEquals($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; } }
/home/jackpotjunglegam/public_html/80d3f/../../public_html/core/app/./Lib/GoogleAuthenticator.php