Revision 2137
Added by darkviper over 8 years ago
| SecureTokens.php | ||
|---|---|---|
| 45 | 45 |
|
| 46 | 46 |
class SecureTokens |
| 47 | 47 |
{
|
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/** character string for 64char encoding */ |
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const CHAR64 = 'Zabcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZa'; |
|
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/** possible settings for TokenLifeTime in seconds */ |
|
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const LIFETIMES = [1800, 2700, 3600, 7200]; // seconds for 30min / 45min / 1h / 2h |
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/** |
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* possible settings for TokenLifeTime in seconds |
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* @description seconds for 30min / 45min / 1h / 75min / 90min / 105min / 2h |
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*/ |
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/** minimum lifetime in seconds */ |
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const LIFETIME_MIN = 1800; // 30min |
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/** maximum lifetime in seconds */ |
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const LIFETIME_MAX = 7200; // 120min (2h) |
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/** stepwidth between min and max */ |
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const LIFETIME_STEP = 900; // 15min |
|
| 52 | 58 |
/** lifetime in seconds to use in DEBUG mode if negative value is given (-1) */ |
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const DEBUG_LIFETIME = 300; |
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|
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const DEBUG_LIFETIME = 300; // 5 |
|
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/** array to hold all tokens from the session */ |
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private $aTokens = array( |
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'default' => array('value' => 0, 'expire' => 0)
|
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'default' => array('value' => 0, 'expire' => 0, 'instance' => 0)
|
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); |
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/** the salt for this run */
|
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/** the salt for this instance */
|
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private $sSalt = ''; |
| 61 | 66 |
/** fingerprint of the current connection */ |
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private $sFingerprint = ''; |
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/** the FTAN token which is valid for this run */
|
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/** the FTAN token which is valid for this instance */
|
|
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private $aLastCreatedFtan = null; |
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/** the time when tokens expired if they created in this instance */ |
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private $iExpireTime = 0; |
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/** remove selected tokens only and update all others */ |
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private $bPreserveAllOtherTokens = false; |
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/** id of the current instance */ |
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private $sCurrentInstance = null; |
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/** id of the instance to remove */ |
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private $sInstanceToDelete = null; |
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/** id of the instance to update expire time */ |
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private $sInstanceToUpdate = null; |
|
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/* --- settings for SecureTokens ------------------------------------------------------ */ |
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/** use fingerprinting to encode */ |
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private $bUseFingerprint = true; |
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/** maximum lifetime of a token in seconds */ |
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private $iTokenLifeTime = 1800; // 30min / 45min / 1h / 2h (default = 30min)
|
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private $iTokenLifeTime = 1800; // between LIFETIME_MIN and LIFETIME_MAX (default = 30min)
|
|
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/** bit length of the IPv4 Netmask (0-32 // 0 = off default = 24) */ |
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private $iNetmaskLengthV4 = 0; |
| 72 | 87 |
/** bit length of the IPv6 Netmask (0-128 // 0 = off default = 64) */ |
| ... | ... | |
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* constructor |
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* @param (void) |
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*/ |
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protected function __construct() {
|
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protected function __construct() |
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{
|
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// load settings if available |
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$this->getSettings(); |
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// generate salt for calculations in this instance |
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$this->sSalt = $this->generateSalt(); |
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// generate fingerprint for the current connection |
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$this->sFingerprint = $this->buildFingerprint(); |
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// define the expiretime for this instance |
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$this->iExpireTime = time() + $this->iTokenLifeTime; |
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// calculate the instance id for this instance |
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$this->sCurrentInstance = $this->encode64(md5($this->iExpireTime.$this->sSalt)); |
|
| 82 | 106 |
// load array of tokens from session |
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$this->loadTokens(); |
| 84 | 108 |
// at first of all remove expired tokens |
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$this->removeExpiredTokens(); |
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// generate salt for calculations in this run |
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$this->sSalt = $this->generateSalt(); |
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// generate fingerprint for the current connection |
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$this->sFingerprint = $this->buildFingerprint(); |
|
| 90 | 110 |
} |
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|
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/** |
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* @param (void) |
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* @return integer |
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* destructor |
|
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*/ |
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public function getTokenLifeTime()
|
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final public function __destruct()
|
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{
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// return 5 seconds less then lifetime to compensate delay of transfer to the client |
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return $this->iTokenLifeTime - 5; |
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foreach ($this->aTokens as $sKey => $aToken) {
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if ($aToken['instance'] == $this->sInstanceToUpdate) {
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$this->aTokens[$sKey]['instance'] = $this->sCurrentInstance; |
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$this->aTokens[$sKey]['expire'] = $this->iExpireTime; |
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} elseif ($aToken['instance'] == $this->sInstanceToDelete) {
|
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unset($this->aTokens[$sKey]); |
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} |
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} |
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$this->saveTokens(); |
|
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} |
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|
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| 101 | 128 |
/** |
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* returns all TokenLifeTime values |
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* @return array |
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*/ |
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final public function getTokenLifeTime() |
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{
|
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return array( |
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'min' => self::LIFETIME_MIN, |
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'max' => self::LIFETIME_MAX, |
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'step' => self::LIFETIME_STEP, |
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'value' => $this->iTokenLifeTime |
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); |
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} |
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|
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/** |
|
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* Dummy method for backward compatibility |
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* @return void |
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* @deprecated from WB-2.8.3-SP5 |
| ... | ... | |
| 153 | 194 |
/** |
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* checks received form-transactionnumbers against session-stored one |
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* @param string $mode: requestmethode POST(default) or GET |
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* @param bool $bPreserve (default=false) |
|
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* @return bool: true if numbers matches against stored ones |
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* |
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* requirements: an active session must be available |
| 159 | 201 |
* this check will prevent from multiple sending a form. history.back() also will never work |
| 160 | 202 |
*/ |
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final public function checkFTAN($mMode = 'POST') |
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final public function checkFTAN($mMode = 'POST', $bPreserve = false)
|
|
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{
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$bRetval = false; |
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$this->bPreserveAllOtherTokens = $bPreserve ?: $this->bPreserveAllOtherTokens; |
|
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// get the POST/GET arguments |
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$aArguments = (strtoupper($mMode) == 'POST' ? $_POST : $_GET); |
| 166 | 209 |
// encode the value of all matching tokens |
| ... | ... | |
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* @param string $sFieldname: name of the POST/GET-Field containing the key or hex-key itself |
| 206 | 249 |
* @param mixed $mDefault: returnvalue if key not exist (default 0) |
| 207 | 250 |
* @param string $sRequest: requestmethode can be POST or GET or '' (default POST) |
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* @param bool $bPreserve (default=false) |
|
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* @return mixed: the original value (string, numeric, array) or DEFAULT if request fails |
| 209 | 253 |
* @description: each IDKEY can be checked only once. Unused Keys stay in list until they expire |
| 210 | 254 |
*/ |
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final public function checkIDKEY( $sFieldname, $mDefault = 0, $sRequest = 'POST' )
|
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final public function checkIDKEY($sFieldname, $mDefault = 0, $sRequest = 'POST', $bPreserve = false)
|
|
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{
|
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$mReturnValue = $mDefault; // set returnvalue to default |
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$this->bPreserveAllOtherTokens = $bPreserve ?: $this->bPreserveAllOtherTokens; |
|
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$sRequest = strtoupper($sRequest); |
| 215 | 260 |
switch ($sRequest) {
|
| 216 | 261 |
case 'POST': |
| ... | ... | |
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} |
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return $mReturnValue; |
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} |
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// *** from here private methods only **************************************************** |
|
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|
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/** |
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* make a valid LifeTime value from given integer on the rules of class SecureTokens |
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* @param integer $iLifeTime |
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* @return integer |
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*/ |
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final public function sanitizeLifeTime($iLifeTime) |
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{
|
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$iLifeTime = intval($iLifeTime); |
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for ($i = self::LIFETIME_MIN; $i <= self::LIFETIME_MAX; $i += self::LIFETIME_STEP) {
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$aLifeTimes[] = $i; |
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} |
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$iRetval = array_pop($aLifeTimes); |
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foreach ($aLifeTimes as $iValue) {
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if ($iLifeTime <= $iValue) {
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$iRetval = $iValue; |
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break; |
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} |
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} |
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return $iRetval; |
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} |
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/* ************************************************************************************ */ |
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/* *** from here private methods only *** */ |
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/* ************************************************************************************ */ |
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/** |
|
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* load all tokens from session |
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*/ |
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private function loadTokens() |
| ... | ... | |
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$sTokenName = sprintf('%16x', hexdec($sTokenName)+1);
|
| 271 | 338 |
} |
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$this->aTokens[$sTokenName] = array( |
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'value' => $sValue, |
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'expire' => time()+$this->iTokenLifeTime |
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'value' => $sValue, |
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'expire' => $this->iExpireTime, |
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'instance' => $this->sCurrentInstance |
|
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); |
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$this->saveTokens(); |
|
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return $sTokenName; |
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} |
| 279 | 346 |
|
| ... | ... | |
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private function removeToken($sTokenName) |
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{
|
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if (isset($this->aTokens[$sTokenName])) {
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if ($this->bPreserveAllOtherTokens) {
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$this->sInstanceToUpdate = $this->aTokens[$sTokenName]['instance']; |
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} else {
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$this->sInstanceToDelete = $this->aTokens[$sTokenName]['instance']; |
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} |
|
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unset($this->aTokens[$sTokenName]); |
| 288 | 360 |
} |
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$this->saveTokens(); |
|
| 290 | 361 |
} |
| 291 | 362 |
|
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/** |
| ... | ... | |
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unset($this->aTokens[$sTokenName]); |
| 301 | 372 |
} |
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} |
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$this->saveTokens(); |
|
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} |
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|
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/** |
| ... | ... | |
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private function buildFingerprint() |
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{
|
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if (!$this->bUseFingerprint) { return md5('dummy'); }
|
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$sClientIp = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '0.0.0.0'; |
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$sClientIp = '127.0.0.1'; |
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if (array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER)){
|
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$sClientIp = array_pop(preg_split('/\s*?,\s*?/', $_SERVER['HTTP_X_FORWARDED_FOR'], null, PREG_SPLIT_NO_EMPTY));
|
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}else if (array_key_exists('REMOTE_ADDR', $_SERVER)) {
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$sClientIp = $_SERVER['REMOTE_ADDR']; |
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}else if (array_key_exists('HTTP_CLIENT_IP', $_SERVER)) {
|
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$sClientIp = $_SERVER['HTTP_CLIENT_IP']; |
|
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} |
|
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$sFingerprint = __FILE__.PHP_VERSION |
| 328 | 405 |
. isset($_SERVER['SERVER_SIGNATURE']) ? $_SERVER['SERVER_SIGNATURE'] : 'unknown' |
| 329 | 406 |
. isset($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : 'AGENT' |
| ... | ... | |
| 390 | 467 |
* encode a hex string into a 64char based string |
| 391 | 468 |
* @param string $sMd5Hash |
| 392 | 469 |
* @return string |
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* @description reduce the 32char length of a MD5 to 21 chars
|
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* @description reduce the 32char length of a MD5 to 22 chars
|
|
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*/ |
| 395 | 472 |
private function encode64($sMd5Hash) |
| 396 | 473 |
{
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$sCharList = self::CHAR64; |
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$sBin = implode( |
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'', |
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array_map( |
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function($sPart) {
|
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return sprintf('%032b', hexdec($sPart));
|
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}, |
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str_split($sMd5Hash, 8) |
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) |
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); |
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$sResult = implode( |
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'', |
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array_map( |
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function($sPart) use ($sCharList) {
|
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$sPart = str_pad($sPart, 6, '0', STR_PAD_RIGHT); |
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return $sCharList[bindec($sPart)]; |
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}, |
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str_split($sBin, 6) |
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) |
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); |
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return $sResult; |
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return rtrim(base64_encode(pack('h*',$sMd5Hash)), '+-= ');
|
|
| 418 | 475 |
} |
| 419 | 476 |
|
| 420 | 477 |
/** |
| ... | ... | |
| 422 | 479 |
*/ |
| 423 | 480 |
private function getSettings() |
| 424 | 481 |
{
|
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$this->bUseFingerprint = isset($this->oReg->SecTokenFingerprint) |
|
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? $this->oReg->SecTokenFingerprint |
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: $this->bUseFingerprint; |
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$this->iNetmaskLengthV4 = isset($this->oReg->SecTokenNetmask4) |
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? $this->oReg->SecTokenNetmask4 |
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: $this->iNetmaskLengthV4; |
|
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$this->iNetmaskLengthV6 = isset($this->oReg->SecTokenNetmask6) |
|
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? $this->oReg->SecTokenNetmask6 |
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: $this->iNetmaskLengthV6; |
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$this->iTokenLifeTime = isset($this->oReg->SecTokenLifeTime) |
|
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? $this->oReg->SecTokenLifeTime |
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: $this->iTokenLifeTime; |
|
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if (!class_exists('WbAdaptor', false)) {
|
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// for WB before 2.8.4 |
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$this->bUseFingerprint = defined('SEC_TOKEN_FINGERPRINT')
|
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? SEC_TOKEN_FINGERPRINT |
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: $this->bUseFingerprint; |
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$this->iNetmaskLengthV4 = defined('SEC_TOKEN_NETMASK4')
|
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? SEC_TOKEN_NETMASK4 |
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: $this->iNetmaskLengthV4; |
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$this->iNetmaskLengthV6 = defined('SEC_TOKEN_NETMASK6')
|
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? SEC_TOKEN_NETMASK6 |
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: $this->iNetmaskLengthV6; |
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$this->iTokenLifeTime = defined('SEC_TOKEN_LIFE_TIME')
|
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? SEC_TOKEN_LIFE_TIME |
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: $this->iTokenLifeTime; |
|
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} else {
|
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// for WB from 2.8.4 and up |
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$this->bUseFingerprint = isset($this->oReg->SecTokenFingerprint) |
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? $this->oReg->SecTokenFingerprint |
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: $this->bUseFingerprint; |
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$this->iNetmaskLengthV4 = isset($this->oReg->SecTokenNetmask4) |
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? $this->oReg->SecTokenNetmask4 |
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: $this->iNetmaskLengthV4; |
|
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$this->iNetmaskLengthV6 = isset($this->oReg->SecTokenNetmask6) |
|
| 505 |
? $this->oReg->SecTokenNetmask6 |
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: $this->iNetmaskLengthV6; |
|
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$this->iTokenLifeTime = isset($this->oReg->SecTokenLifeTime) |
|
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? $this->oReg->SecTokenLifeTime |
|
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: $this->iTokenLifeTime; |
|
| 510 |
} |
|
| 437 | 511 |
$this->iNetmaskLengthV4 = ($this->iNetmaskLengthV4 < 1 || $this->iNetmaskLengthV4 > 32) |
| 438 | 512 |
? 0 :$this->iNetmaskLengthV4; |
| 439 | 513 |
$this->iNetmaskLengthV6 = ($this->iNetmaskLengthV6 < 1 || $this->iNetmaskLengthV6 > 128) |
| 440 | 514 |
? 0 :$this->iNetmaskLengthV6; |
| 441 |
$aLifeTimes = self::LIFETIMES; |
|
| 442 |
sort($aLifeTimes); |
|
| 443 |
if ($this->iTokenLifeTime < 0 && DEBUG) {
|
|
| 515 |
$this->iTokenLifeTime = $this->sanitizeLifeTime($this->iTokenLifeTime); |
|
| 516 |
if ($this->iTokenLifeTime <= self::LIFETIME_MIN && DEBUG) {
|
|
| 444 | 517 |
$this->iTokenLifeTime = self::DEBUG_LIFETIME; |
| 445 |
} else {
|
|
| 446 |
$iRetval = array_pop($aLifeTimes); |
|
| 447 |
foreach ($aLifeTimes as $iValue) {
|
|
| 448 |
if ($this->iTokenLifeTime <= $iValue) {
|
|
| 449 |
$iRetval = $iValue; |
|
| 450 |
break; |
|
| 451 |
} |
|
| 452 |
} |
|
| 453 |
$this->iTokenLifeTime = $iRetval; |
|
| 454 | 518 |
} |
| 455 |
|
|
| 456 | 519 |
} |
| 457 | 520 |
|
| 521 |
|
|
| 458 | 522 |
} // end of class SecureTokens |
Also available in: Unified diff
! class SecureTokens: added easy handling of service requests on checkFTAN()/checkIDKEY()