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<?php |
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declare(strict_types=1); |
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/** |
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* @author Christoph Wurst <[email protected]> |
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* |
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* Nextcloud - Two-factor Gateway |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace OCA\TwoFactorGateway\Provider; |
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use OCA\TwoFactorGateway\Exception\SmsTransmissionException; |
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use OCA\TwoFactorGateway\PhoneNumberMask; |
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use OCA\TwoFactorGateway\Service\Gateway\IGateway; |
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use OCA\TwoFactorGateway\Service\StateStorage; |
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use OCP\Authentication\TwoFactorAuth\IProvider; |
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use OCP\IL10N; |
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use OCP\ISession; |
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use OCP\IUser; |
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use OCP\Security\ISecureRandom; |
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use OCP\Template; |
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abstract class AProvider implements IProvider { |
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const STATE_DISABLED = 0; |
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const STATE_START_VERIFICATION = 1; |
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const STATE_VERIFYING = 2; |
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const STATE_ENABLED = 3; |
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/** @var string */ |
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protected $gatewayName; |
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/** @var IGateway */ |
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protected $gateway; |
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/** @var StateStorage */ |
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protected $stateStorage; |
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/** @var ISession */ |
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protected $session; |
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/** @var ISecureRandom */ |
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protected $secureRandom; |
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/** @var IL10N */ |
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protected $l10n; |
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private function getSessionKey() { |
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return "twofactor_gateway_$this->gatewayId" . "_secret"; |
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} |
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public function __construct(string $gatewayId, |
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IGateway $gateway, |
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StateStorage $stateStorage, |
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ISession $session, |
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ISecureRandom $secureRandom, |
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IL10N $l10n) { |
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$this->gateway = $gateway; |
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$this->gatewayName = $gatewayId; |
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$this->stateStorage = $stateStorage; |
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$this->session = $session; |
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$this->secureRandom = $secureRandom; |
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$this->l10n = $l10n; |
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} |
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/** |
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* Get unique identifier of this 2FA provider |
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*/ |
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public function getId(): string { |
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return "gateway_$this->gatewayName"; |
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} |
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private function getSecret(): string { |
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if ($this->session->exists($this->getSessionKey())) { |
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return $this->session->get($this->getSessionKey()); |
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} |
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$secret = $this->secureRandom->generate(6, ISecureRandom::CHAR_DIGITS); |
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$this->session->set($this->getSessionKey(), $secret); |
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return $secret; |
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} |
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/** |
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* Get the template for rending the 2FA provider view |
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*/ |
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public function getTemplate(IUser $user): Template { |
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$secret = $this->getSecret(); |
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try { |
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$identifier = $this->stateStorage->get($user, $this->gatewayName)->getIdentifier(); |
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$this->gateway->send( |
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$user, |
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$identifier, |
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$this->l10n->t('%s is your Nextcloud authentication code', [ |
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$secret |
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]) |
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); |
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} catch (SmsTransmissionException $ex) { |
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return new Template('twofactor_gateway', 'error'); |
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} |
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$tmpl = new Template('twofactor_gateway', 'challenge'); |
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$tmpl->assign('phone', PhoneNumberMask::maskNumber($identifier)); |
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return $tmpl; |
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} |
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/** |
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* Verify the given challenge |
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*/ |
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public function verifyChallenge(IUser $user, string $challenge): bool { |
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$valid = $this->session->exists($this->getSessionKey()) |
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&& $this->session->get($this->getSessionKey()) === $challenge; |
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if ($valid) { |
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$this->session->remove($this->getSessionKey()); |
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} |
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return $valid; |
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} |
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/** |
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* Decides whether 2FA is enabled for the given user |
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*/ |
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public function isTwoFactorAuthEnabledForUser(IUser $user): bool { |
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return $this->stateStorage->get($user, $this->gatewayName)->getState() === self::STATE_ENABLED; |
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} |
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} |
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nextcloud /
twofactor_gateway
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