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<?php |
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namespace App\Support; |
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use Symfony\Component\HttpFoundation\File\MimeType\ExtensionGuesser; |
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class Helper |
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{ |
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/** |
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* Get file extension for MIME type. |
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* |
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* @param string $mimeType |
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* @param string $prefix |
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* @return string|null |
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*/ |
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public static function fileExtensionForMimeType($mimeType, $prefix = '') |
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{ |
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$extension = ExtensionGuesser::getInstance()->guess($mimeType); |
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if (! is_null($extension)) { |
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if ('jpeg' == $extension) { |
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$extension = 'jpg'; |
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} |
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return $prefix.$extension; |
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} |
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} |
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/** |
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* Convert an iOS platform to the device model name. |
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* |
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* @see https://www.theiphonewiki.com/wiki/Models |
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* @see https://support.hockeyapp.net/kb/client-integration-ios-mac-os-x-tvos/ios-device-types |
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* |
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* @param string $platform |
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* @return string |
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*/ |
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public static function iDeviceModel($platform) |
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{ |
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$list = [ |
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'iPhone1,1' => 'iPhone', |
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'iPhone1,2' => 'iPhone 3G', |
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'iPhone2,1' => 'iPhone 3GS', |
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'iPhone3,1' => 'iPhone 4', |
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'iPhone3,2' => 'iPhone 4', |
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'iPhone3,3' => 'iPhone 4', |
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'iPhone4,1' => 'iPhone 4S', |
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'iPhone5,1' => 'iPhone 5', |
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'iPhone5,2' => 'iPhone 5', |
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'iPhone5,3' => 'iPhone 5c', |
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'iPhone5,4' => 'iPhone 5c', |
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'iPhone6,1' => 'iPhone 5s', |
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'iPhone6,2' => 'iPhone 5s', |
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'iPhone7,1' => 'iPhone 6 Plus', |
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'iPhone7,2' => 'iPhone 6', |
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'iPhone8,1' => 'iPhone 6s', |
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'iPhone8,2' => 'iPhone 6s Plus', |
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'iPhone8,4' => 'iPhone SE', |
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'iPhone9,1' => 'iPhone 7', |
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'iPhone9,2' => 'iPhone 7 Plus', |
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'iPhone9,3' => 'iPhone 7', |
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'iPhone9,4' => 'iPhone 7 Plus', |
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'iPod1,1' => 'iPod touch', |
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'iPod2,1' => 'iPod touch 2G', |
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'iPod3,1' => 'iPod touch 3G', |
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'iPod4,1' => 'iPod touch 4G', |
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'iPod5,1' => 'iPod touch 5G', |
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'iPod7,1' => 'iPod touch 6G', |
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'iPad1,1' => 'iPad', |
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'iPad2,1' => 'iPad 2', |
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'iPad2,2' => 'iPad 2', |
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'iPad2,3' => 'iPad 2', |
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'iPad2,4' => 'iPad 2', |
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'iPad2,5' => 'iPad mini', |
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'iPad2,6' => 'iPad mini', |
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'iPad2,7' => 'iPad mini', |
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'iPad3,1' => 'iPad 3', |
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'iPad3,2' => 'iPad 3', |
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'iPad3,3' => 'iPad 3', |
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'iPad3,4' => 'iPad 4', |
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'iPad3,5' => 'iPad 4', |
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'iPad3,6' => 'iPad 4', |
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'iPad4,1' => 'iPad Air', |
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'iPad4,2' => 'iPad Air', |
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'iPad4,3' => 'iPad Air', |
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'iPad4,4' => 'iPad mini 2', |
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'iPad4,5' => 'iPad mini 2', |
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'iPad4,6' => 'iPad mini 2', |
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'iPad4,7' => 'iPad mini 3', |
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'iPad4,8' => 'iPad mini 3', |
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'iPad4,9' => 'iPad mini 3', |
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'iPad5,1' => 'iPad mini 4', |
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'iPad5,2' => 'iPad mini 4', |
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'iPad5,3' => 'iPad Air 2', |
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'iPad5,4' => 'iPad Air 2', |
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'iPad6,3' => 'iPad Pro', |
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'iPad6,4' => 'iPad Pro', |
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'iPad6,7' => 'iPad Pro', |
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'iPad6,8' => 'iPad Pro', |
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'AppleTV2,1' => 'Apple TV 2G', |
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'AppleTV3,1' => 'Apple TV 3G', |
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'AppleTV3,2' => 'Apple TV 3G', |
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'AppleTV5,3' => 'Apple TV 4G', |
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'Watch1,1' => 'Apple Watch', |
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'Watch1,2' => 'Apple Watch', |
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'Watch2,6' => 'Apple Watch Series 1', |
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'Watch2,7' => 'Apple Watch Series 1', |
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'Watch2,3' => 'Apple Watch Series 2', |
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'Watch2,4' => 'Apple Watch Series 2', |
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'i386' => 'Simulator', |
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'x86_64' => 'Simulator', |
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]; |
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return isset($list[$platform]) ? $list[$platform] : $platform; |
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} |
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/** |
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* Get the mail homepage. |
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* |
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* @param string $address |
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* @return string|null |
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*/ |
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public static function mailHomepage($address) |
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{ |
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if (preg_match('#@([a-z0-9.-]+)#i', $address, $match)) { |
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$list = [ |
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'qq.com' => 'https://mail.qq.com', |
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'vip.qq.com' => 'https://mail.qq.com', |
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'126.com' => 'http://www.126.com', |
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'gmail.com' => 'https://mail.google.com', |
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'139.com' => 'http://mail.10086.cn', |
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'wo.cn' => 'http://mail.wo.com.cn', |
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'sina.com' => 'http://mail.sina.com.cn', |
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'sina.cn' => 'http://mail.sina.com.cn', |
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'vip.sina.com' => 'http://mail.sina.com.cn', |
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]; |
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$domain = strtolower($match[1]); |
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return isset($list[$domain]) ? $list[$domain] : 'http://mail.'.$domain; |
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} |
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} |
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/** |
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* Get the Gravatar URL. |
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* |
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* @param string $email |
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* @param int $size |
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* @param string $default |
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* @param string $rating |
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* @return string |
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* |
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* @see http://cn.gravatar.com/site/implement/images/ |
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*/ |
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public static function gravatar($email, $size = 100, $default = null, $rating = null) |
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{ |
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if (is_null($default)) { |
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$default = config('services.gravatar.default'); |
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} |
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if (is_null($rating)) { |
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$rating = config('services.gravatar.rating'); |
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} |
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$query = http_build_query(compact('size', 'default', 'rating')); |
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return app('url')->assetFrom( |
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config('services.gravatar.host', 'http://gravatar.com/avatar'), |
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md5(strtolower(trim($email))).'?'.$query |
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); |
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} |
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/** |
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* Encrypt ASCII string via XOR. |
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* |
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* @param string $text |
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* @param string|null $key |
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* @return string |
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*/ |
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public static function sampleEncrypt($text, $key = null) |
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{ |
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$text = (string) $text; |
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if (is_null($key)) { |
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$key = app('encrypter')->getKey(); |
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} |
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// 生成随机字符串 |
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$random = str_random(strlen($text)); |
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// 按字符拼接:随机字符串 + 随机字符串异或原文 |
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$tmp = static::sampleEncryption($text, $random, function ($a, $b) { |
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return $b.($a ^ $b); |
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}); |
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// 异或 $tmp 和 $key |
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$result = static::sampleEncryption($tmp, $key); |
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return urlsafe_base64_encode($result); |
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} |
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/** |
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* Decrypt string via XOR. |
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* |
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* @param string $text |
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* @param string|null $key |
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* @return string |
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*/ |
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public static function sampleDecrypt($text, $key = null) |
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{ |
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if (is_null($key)) { |
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$key = app('encrypter')->getKey(); |
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} |
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$tmp = static::sampleEncryption(urlsafe_base64_decode($text), $key); |
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$tmpLength = strlen($tmp); |
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$result = ''; |
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for ($i = 0; $i < $tmpLength, ($i + 1) < $tmpLength; $i += 2) { |
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$result .= $tmp[$i] ^ $tmp[$i + 1]; |
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} |
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return $result; |
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} |
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/** |
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* Do a sample XOR encryption. |
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* |
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* @param string $text |
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* @param string $key |
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* @param \Closure|null $callback `($a, $b, $index)` |
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* @return string |
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*/ |
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protected static function sampleEncryption($text, $key, $callback = null) |
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{ |
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// 对 $text 和 $key 的每个字符进行运算。 |
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// $callback 为 null 时默认进行异或运算。 |
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// $callback 参数: 第 i 位 $text, 第 i 位 $key, 下标 i |
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// $callback 返回 false 时,结束字符循环. |
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$text = (string) $text; |
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$key = (string) $key; |
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$keyLength = strlen($key); |
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if (is_null($callback)) { |
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$callback = function ($a, $b) { |
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return $a ^ $b; |
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}; |
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} |
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$result = ''; |
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$textLength = strlen($text); |
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for ($i = 0; $i < $textLength; $i++) { |
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$tmp = $callback($text[$i], $key[$i % $keyLength], $i); |
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if (false === $tmp) { |
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break; |
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} |
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$result .= $tmp; |
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} |
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return $result; |
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} |
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/** |
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* Convert an integer to a string. |
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* It is useful to shorten a database ID to URL keyword, e.g. 54329 to 'xkE'. |
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* |
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* @param int $number |
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* @param string|null $characters |
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* @return string |
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*/ |
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public static function int2string($number, string $characters = null) |
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{ |
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$number = (int) $number; |
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if ($number < 0) { |
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return ''; |
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} |
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if (is_null($characters)) { |
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$characters = config('support.int2string'); |
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} |
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$charactersLength = strlen($characters); |
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$string = ''; |
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while ($number >= $charactersLength) { |
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$mod = (int) bcmod($number, $charactersLength); |
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$number = (int) bcdiv($number, $charactersLength); |
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$string = $characters[$mod].$string; |
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} |
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return $characters[$number].$string; |
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} |
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/** |
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297
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* Convert an `int2string` generated string back to an integer. |
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* |
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* @param string $string |
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* @param string|null $characters |
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* @return int |
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*/ |
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public static function string2int($string, string $characters = null) |
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{ |
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$string = strrev($string); |
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$stringLength = strlen($string); |
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if (is_null($characters)) { |
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$characters = config('support.int2string'); |
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} |
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$charactersLength = strlen($characters); |
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$number = 0; |
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|
|
for ($i = 0; $i < $stringLength; $i++) { |
|
315
|
|
|
$index = strpos($characters, $string[$i]); |
|
316
|
|
|
$number = (int) bcadd($number, bcmul($index, bcpow($charactersLength, $i))); |
|
317
|
|
|
} |
|
318
|
|
|
|
|
319
|
|
|
return $number; |
|
320
|
|
|
} |
|
321
|
|
|
} |
|
322
|
|
|
|