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<?php declare(strict_types=1); |
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/** |
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* Copyright 2023 SURFnet bv |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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namespace Surfnet\StepupGateway\GatewayBundle\Sso2fa\DateTime; |
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use DateTime as CoreDateTime; |
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use Surfnet\StepupBundle\DateTime\DateTime; |
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use Surfnet\StepupGateway\GatewayBundle\Sso2fa\Exception\InvalidAuthenticationTimeException; |
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use Surfnet\StepupGateway\GatewayBundle\Sso2fa\ValueObject\CookieValueInterface; |
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use TypeError; |
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class ExpirationHelper implements ExpirationHelperInterface |
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{ |
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/** |
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* @var CoreDateTime |
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*/ |
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private $now; |
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/* |
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* The period in seconds that we still acknowledge the |
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* cookie even tho the expiration was reached. This accounts |
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* for server time/sync differences that may occur. |
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*/ |
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private $gracePeriod; |
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/* |
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* The SSO on 2FA cookie lifetime in seconds |
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* |
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* See: config/legacy/parameters.yaml sso_cookie_lifetime |
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*/ |
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private $cookieLifetime; |
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public function __construct(int $cookieLifetime, int $gracePeriod, CoreDateTime $now = null) |
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{ |
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$this->cookieLifetime = $cookieLifetime; |
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$this->gracePeriod = $gracePeriod; |
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if (!$now) { |
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$now = DateTime::now(); |
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} |
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$this->now = $now; |
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} |
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public function isExpired(CookieValueInterface $cookieValue): bool |
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{ |
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try { |
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$authenticationTimestamp = $cookieValue->authenticationTime(); |
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} catch (TypeError $error) { |
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throw new InvalidAuthenticationTimeException( |
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'The authentication time contained a non-int value', |
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0, |
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$error |
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); |
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} |
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if ($authenticationTimestamp < 0) { |
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throw new InvalidAuthenticationTimeException( |
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'The authentication time is from before the Unix timestamp epoch' |
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); |
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} |
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if ($authenticationTimestamp > $this->now->getTimestamp()) { |
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throw new InvalidAuthenticationTimeException( |
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'The authentication time is from the future, which indicates the clock settings ' . |
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'are incorrect, or the time in the cookie value was tampered with.' |
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); |
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} |
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$expirationTimestamp = $authenticationTimestamp + $this->cookieLifetime + $this->gracePeriod; |
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$currentTimestamp = $this->now->getTimestamp(); |
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// Is the current time greater than the expiration time? |
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return $currentTimestamp > $expirationTimestamp; |
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} |
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} |
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OpenConext /
Stepup-Gateway
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