377 lines
11 KiB
PHP
377 lines
11 KiB
PHP
<?php
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declare(strict_types=1);
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/**
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* @copyright Copyright 2018, Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @author Roeland Jago Douma <roeland@famdouma.nl>
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*
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* @license AGPL-3.0
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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 OC\Authentication\Token;
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use OC\Authentication\Exceptions\ExpiredTokenException;
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use OC\Authentication\Exceptions\InvalidTokenException;
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use OC\Authentication\Exceptions\PasswordlessTokenException;
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use OC\Authentication\Exceptions\WipeTokenException;
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use OCP\AppFramework\Db\DoesNotExistException;
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use OCP\AppFramework\Utility\ITimeFactory;
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use OCP\IConfig;
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use OCP\ILogger;
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use OCP\Security\ICrypto;
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class PublicKeyTokenProvider implements IProvider {
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/** @var PublicKeyTokenMapper */
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private $mapper;
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/** @var ICrypto */
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private $crypto;
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/** @var IConfig */
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private $config;
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/** @var ILogger $logger */
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private $logger;
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/** @var ITimeFactory $time */
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private $time;
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public function __construct(PublicKeyTokenMapper $mapper,
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ICrypto $crypto,
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IConfig $config,
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ILogger $logger,
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ITimeFactory $time) {
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$this->mapper = $mapper;
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$this->crypto = $crypto;
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$this->config = $config;
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$this->logger = $logger;
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$this->time = $time;
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}
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/**
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* {@inheritDoc}
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*/
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public function generateToken(string $token,
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string $uid,
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string $loginName,
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$password,
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string $name,
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int $type = IToken::TEMPORARY_TOKEN,
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int $remember = IToken::DO_NOT_REMEMBER): IToken {
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$dbToken = $this->newToken($token, $uid, $loginName, $password, $name, $type, $remember);
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$this->mapper->insert($dbToken);
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return $dbToken;
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}
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public function getToken(string $tokenId): IToken {
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try {
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$token = $this->mapper->getToken($this->hashToken($tokenId));
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} catch (DoesNotExistException $ex) {
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throw new InvalidTokenException();
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}
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if ((int)$token->getExpires() !== 0 && $token->getExpires() < $this->time->getTime()) {
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throw new ExpiredTokenException($token);
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}
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if ($token->getType() === IToken::WIPE_TOKEN) {
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throw new WipeTokenException($token);
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}
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return $token;
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}
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public function getTokenById(int $tokenId): IToken {
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try {
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$token = $this->mapper->getTokenById($tokenId);
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} catch (DoesNotExistException $ex) {
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throw new InvalidTokenException();
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}
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if ((int)$token->getExpires() !== 0 && $token->getExpires() < $this->time->getTime()) {
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throw new ExpiredTokenException($token);
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}
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if ($token->getType() === IToken::WIPE_TOKEN) {
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throw new WipeTokenException($token);
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}
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return $token;
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}
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public function renewSessionToken(string $oldSessionId, string $sessionId) {
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$token = $this->getToken($oldSessionId);
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if (!($token instanceof PublicKeyToken)) {
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throw new InvalidTokenException();
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}
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$password = null;
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if (!is_null($token->getPassword())) {
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$privateKey = $this->decrypt($token->getPrivateKey(), $oldSessionId);
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$password = $this->decryptPassword($token->getPassword(), $privateKey);
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}
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$this->generateToken(
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$sessionId,
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$token->getUID(),
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$token->getLoginName(),
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$password,
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$token->getName(),
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IToken::TEMPORARY_TOKEN,
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$token->getRemember()
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);
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$this->mapper->delete($token);
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}
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public function invalidateToken(string $token) {
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$this->mapper->invalidate($this->hashToken($token));
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}
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public function invalidateTokenById(string $uid, int $id) {
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$this->mapper->deleteById($uid, $id);
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}
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public function invalidateOldTokens() {
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$olderThan = $this->time->getTime() - (int) $this->config->getSystemValue('session_lifetime', 60 * 60 * 24);
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$this->logger->debug('Invalidating session tokens older than ' . date('c', $olderThan), ['app' => 'cron']);
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$this->mapper->invalidateOld($olderThan, IToken::DO_NOT_REMEMBER);
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$rememberThreshold = $this->time->getTime() - (int) $this->config->getSystemValue('remember_login_cookie_lifetime', 60 * 60 * 24 * 15);
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$this->logger->debug('Invalidating remembered session tokens older than ' . date('c', $rememberThreshold), ['app' => 'cron']);
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$this->mapper->invalidateOld($rememberThreshold, IToken::REMEMBER);
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}
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public function updateToken(IToken $token) {
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if (!($token instanceof PublicKeyToken)) {
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throw new InvalidTokenException();
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}
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$this->mapper->update($token);
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}
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public function updateTokenActivity(IToken $token) {
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if (!($token instanceof PublicKeyToken)) {
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throw new InvalidTokenException();
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}
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/** @var DefaultToken $token */
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$now = $this->time->getTime();
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if ($token->getLastActivity() < ($now - 60)) {
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// Update token only once per minute
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$token->setLastActivity($now);
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$this->mapper->update($token);
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}
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}
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public function getTokenByUser(string $uid): array {
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return $this->mapper->getTokenByUser($uid);
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}
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public function getPassword(IToken $token, string $tokenId): string {
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if (!($token instanceof PublicKeyToken)) {
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throw new InvalidTokenException();
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}
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if ($token->getPassword() === null) {
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throw new PasswordlessTokenException();
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}
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// Decrypt private key with tokenId
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$privateKey = $this->decrypt($token->getPrivateKey(), $tokenId);
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// Decrypt password with private key
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return $this->decryptPassword($token->getPassword(), $privateKey);
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}
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public function setPassword(IToken $token, string $tokenId, string $password) {
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if (!($token instanceof PublicKeyToken)) {
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throw new InvalidTokenException();
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}
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// When changing passwords all temp tokens are deleted
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$this->mapper->deleteTempToken($token);
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// Update the password for all tokens
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$tokens = $this->mapper->getTokenByUser($token->getUID());
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foreach ($tokens as $t) {
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$publicKey = $t->getPublicKey();
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$t->setPassword($this->encryptPassword($password, $publicKey));
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$this->updateToken($t);
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}
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}
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public function rotate(IToken $token, string $oldTokenId, string $newTokenId): IToken {
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if (!($token instanceof PublicKeyToken)) {
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throw new InvalidTokenException();
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}
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// Decrypt private key with oldTokenId
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$privateKey = $this->decrypt($token->getPrivateKey(), $oldTokenId);
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// Encrypt with the new token
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$token->setPrivateKey($this->encrypt($privateKey, $newTokenId));
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$token->setToken($this->hashToken($newTokenId));
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$this->updateToken($token);
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return $token;
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}
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private function encrypt(string $plaintext, string $token): string {
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$secret = $this->config->getSystemValue('secret');
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return $this->crypto->encrypt($plaintext, $token . $secret);
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}
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/**
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* @throws InvalidTokenException
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*/
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private function decrypt(string $cipherText, string $token): string {
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$secret = $this->config->getSystemValue('secret');
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try {
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return $this->crypto->decrypt($cipherText, $token . $secret);
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} catch (\Exception $ex) {
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// Delete the invalid token
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$this->invalidateToken($token);
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throw new InvalidTokenException();
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}
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}
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private function encryptPassword(string $password, string $publicKey): string {
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openssl_public_encrypt($password, $encryptedPassword, $publicKey, OPENSSL_PKCS1_OAEP_PADDING);
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$encryptedPassword = base64_encode($encryptedPassword);
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return $encryptedPassword;
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}
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private function decryptPassword(string $encryptedPassword, string $privateKey): string {
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$encryptedPassword = base64_decode($encryptedPassword);
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openssl_private_decrypt($encryptedPassword, $password, $privateKey, OPENSSL_PKCS1_OAEP_PADDING);
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return $password;
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}
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private function hashToken(string $token): string {
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$secret = $this->config->getSystemValue('secret');
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return hash('sha512', $token . $secret);
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}
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/**
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* Convert a DefaultToken to a publicKeyToken
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* This will also be updated directly in the Database
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* @throws \RuntimeException when OpenSSL reports a problem
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*/
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public function convertToken(DefaultToken $defaultToken, string $token, $password): PublicKeyToken {
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$pkToken = $this->newToken(
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$token,
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$defaultToken->getUID(),
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$defaultToken->getLoginName(),
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$password,
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$defaultToken->getName(),
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$defaultToken->getType(),
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$defaultToken->getRemember()
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);
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$pkToken->setExpires($defaultToken->getExpires());
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$pkToken->setId($defaultToken->getId());
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return $this->mapper->update($pkToken);
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}
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/**
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* @throws \RuntimeException when OpenSSL reports a problem
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*/
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private function newToken(string $token,
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string $uid,
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string $loginName,
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$password,
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string $name,
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int $type,
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int $remember): PublicKeyToken {
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$dbToken = new PublicKeyToken();
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$dbToken->setUid($uid);
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$dbToken->setLoginName($loginName);
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$config = array_merge([
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'digest_alg' => 'sha512',
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'private_key_bits' => 2048,
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], $this->config->getSystemValue('openssl', []));
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// Generate new key
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$res = openssl_pkey_new($config);
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if ($res === false) {
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$this->logOpensslError();
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throw new \RuntimeException('OpenSSL reported a problem');
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}
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if (openssl_pkey_export($res, $privateKey, null, $config) === false) {
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$this->logOpensslError();
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throw new \RuntimeException('OpenSSL reported a problem');
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}
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// Extract the public key from $res to $pubKey
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$publicKey = openssl_pkey_get_details($res);
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$publicKey = $publicKey['key'];
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$dbToken->setPublicKey($publicKey);
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$dbToken->setPrivateKey($this->encrypt($privateKey, $token));
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if (!is_null($password)) {
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$dbToken->setPassword($this->encryptPassword($password, $publicKey));
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}
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$dbToken->setName($name);
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$dbToken->setToken($this->hashToken($token));
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$dbToken->setType($type);
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$dbToken->setRemember($remember);
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$dbToken->setLastActivity($this->time->getTime());
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$dbToken->setLastCheck($this->time->getTime());
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$dbToken->setVersion(PublicKeyToken::VERSION);
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return $dbToken;
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}
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public function markPasswordInvalid(IToken $token, string $tokenId) {
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if (!($token instanceof PublicKeyToken)) {
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throw new InvalidTokenException();
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}
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$token->setPasswordInvalid(true);
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$this->mapper->update($token);
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}
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public function updatePasswords(string $uid, string $password) {
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if (!$this->mapper->hasExpiredTokens($uid)) {
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// Nothing to do here
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return;
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}
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// Update the password for all tokens
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$tokens = $this->mapper->getTokenByUser($uid);
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foreach ($tokens as $t) {
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$publicKey = $t->getPublicKey();
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$t->setPassword($this->encryptPassword($password, $publicKey));
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$this->updateToken($t);
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}
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}
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private function logOpensslError() {
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$errors = [];
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while ($error = openssl_error_string()) {
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$errors[] = $error;
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}
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$this->logger->critical('Something is wrong with your openssl setup: ' . implode(', ', $errors));
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}
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}
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