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<?php |
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namespace Firesphere\YubiAuth\Helpers; |
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/** |
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* @description Helper Class to convert different keyboard layouts to Qwerty before authenticating |
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*/ |
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class QwertyConvertor |
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{ |
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/** |
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* @var string Dvorak layout |
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*/ |
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protected static $dvorak = "[]',.pyfgcrl/=aoeuidhtns-;qjkxbmwvz{}\"<>PYFGCRL?+AOEUIDHTNS_:QJKXBMWVZ"; |
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/** |
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* @var string Qwerty layout |
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*/ |
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protected static $qwerty = "-=qwertyuiop[]asdfghjkl;'zxcvbnm,./_+QWERTYUIOP{}ASDFGHJKL:\"ZXCVBNM<>?"; |
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/** |
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* This might be tricky to detect, as the initial position of C seems to be the same |
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* |
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* @var string Azerty layout conversion |
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*/ |
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protected static $azerty = ")-azertyuiop^\$qsdfghjklmùwxcvbn,;:=°_AZERTYUIOP¨*QSDFGHJKLM%WXCVBN?./+"; |
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/** |
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* Detect different keyboard layouts and return the converted string. |
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* A Yubi-string alsways starts with `cccccc`. If it's different, we have a different layout. |
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* Dvorak is easy to detect. Azerty on the other hand, might be tricky. |
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* Other conversion additions welcome. |
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* |
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* @param string $yubiString |
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* |
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* @return string |
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*/ |
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public static function convertString($yubiString) |
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{ |
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$yubiString = strtolower($yubiString); |
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/* The string is Dvorak, convert it to QWERTY */ |
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if (strpos($yubiString, 'jjjjjj') === 0) { |
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return self::convertToQwerty($yubiString, static::$dvorak); |
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} |
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/* Azerty has some odd characters which we can use to detect it */ |
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if ( |
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strpos($yubiString, '°') !== false || |
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strpos($yubiString, '¨') !== false || |
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strpos($yubiString, '$') !== false |
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) { |
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return self::convertToQwerty($yubiString, static::$azerty); |
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} |
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return $yubiString; |
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} |
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/** |
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* @param string $originalString |
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* @param string $from Origin we have to convert from |
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* |
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* @return string |
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*/ |
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public static function convertToQwerty($originalString, $from) |
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{ |
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$originalArray = str_split($originalString); |
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$qwerty = str_split(self::$qwerty); |
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$from = str_split($from); |
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$return = ''; |
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foreach ($originalArray as $item) { |
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$return .= $qwerty[array_search($item, $from, true)]; |
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} |
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return $return; |
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} |
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} |
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Firesphere /
silverstripe-yubiauth
