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<?php
declare(strict_types=1);
/**
* SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
* SPDX-License-Identifier: AGPL-3.0-or-later
*/
namespace OC\OCM;
use NCU\Security\Signature\Enum\SignatoryType;
use NCU\Security\Signature\Exceptions\IdentityNotFoundException;
use NCU\Security\Signature\ISignatoryManager;
use NCU\Security\Signature\ISignatureManager;
use NCU\Security\Signature\Model\Signatory;
use OC\Security\IdentityProof\Manager;
use OCP\IAppConfig;
use OCP\IURLGenerator;
use OCP\OCM\Exceptions\OCMProviderException;
use Psr\Log\LoggerInterface;
/**
* @inheritDoc
*
* returns local signatory using IKeyPairManager
* extract optional signatory (keyId+public key) from ocm discovery service on remote instance
*
* @since 31.0.0
*/
class OCMSignatoryManager implements ISignatoryManager {
public const PROVIDER_ID = 'ocm';
public const APPCONFIG_SIGN_IDENTITY_EXTERNAL = 'ocm_signed_request_identity_external';
public const APPCONFIG_SIGN_DISABLED = 'ocm_signed_request_disabled';
public const APPCONFIG_SIGN_ENFORCED = 'ocm_signed_request_enforced';
public function __construct(
private readonly IAppConfig $appConfig,
private readonly ISignatureManager $signatureManager,
private readonly IURLGenerator $urlGenerator,
private readonly Manager $identityProofManager,
private readonly OCMDiscoveryService $ocmDiscoveryService,
private readonly LoggerInterface $logger,
) {
}
/**
* @inheritDoc
*
* @return string
* @since 31.0.0
*/
public function getProviderId(): string {
return self::PROVIDER_ID;
}
/**
* @inheritDoc
*
* @return array
* @since 31.0.0
*/
public function getOptions(): array {
return [];
}
/**
* @inheritDoc
*
* @return Signatory
* @throws IdentityNotFoundException
* @since 31.0.0
*/
public function getLocalSignatory(): Signatory {
/**
* TODO: manage multiple identity (external, internal, ...) to allow a limitation
* based on the requested interface (ie. only accept shares from globalscale)
*/
if ($this->appConfig->hasKey('core', self::APPCONFIG_SIGN_IDENTITY_EXTERNAL, true)) {
$identity = $this->appConfig->getValueString('core', self::APPCONFIG_SIGN_IDENTITY_EXTERNAL, lazy: true);
$keyId = 'https://' . $identity . '/ocm#signature';
} else {
$keyId = $this->generateKeyId();
}
if (!$this->identityProofManager->hasAppKey('core', 'ocm_external')) {
$this->identityProofManager->generateAppKey('core', 'ocm_external', [
'algorithm' => 'rsa',
'private_key_bits' => 2048,
'private_key_type' => OPENSSL_KEYTYPE_RSA,
]);
}
$keyPair = $this->identityProofManager->getAppKey('core', 'ocm_external');
return new Signatory($keyId, $keyPair->getPublic(), $keyPair->getPrivate(), local: true);
}
/**
* - tries to generate a keyId using global configuration (from signature manager) if available
* - generate a keyId using the current route to ocm shares
*
* @return string
* @throws IdentityNotFoundException
*/
private function generateKeyId(): string {
try {
return $this->signatureManager->generateKeyIdFromConfig('/ocm#signature');
} catch (IdentityNotFoundException) {
}
$url = $this->urlGenerator->linkToRouteAbsolute('cloud_federation_api.requesthandlercontroller.addShare');
$identity = $this->signatureManager->extractIdentityFromUri($url);
// catching possible subfolder to create a keyId like 'https://hostname/subfolder/ocm#signature
$path = parse_url($url, PHP_URL_PATH);
$pos = strpos($path, '/ocm/shares');
$sub = ($pos) ? substr($path, 0, $pos) : '';
return 'https://' . $identity . $sub . '/ocm#signature';
}
/**
* @inheritDoc
*
* @param string $remote
*
* @return Signatory|null must be NULL if no signatory is found
* @since 31.0.0
*/
public function getRemoteSignatory(string $remote): ?Signatory {
try {
return $this->getRemoteSignatoryFromHost($remote);
} catch (OCMProviderException $e) {
$this->logger->warning('fail to get remote signatory', ['exception' => $e, 'remote' => $remote]);
return null;
}
}
/**
* As host is enough to generate signatory using OCMDiscoveryService
*
* @param string $host
*
* @return Signatory|null
* @throws OCMProviderException on fail to discover ocm services
* @since 31.0.0
*/
public function getRemoteSignatoryFromHost(string $host): ?Signatory {
$ocmProvider = $this->ocmDiscoveryService->discover($host, true);
$signatory = $ocmProvider->getSignatory();
$signatory?->setType(SignatoryType::TRUSTED);
return $signatory;
}
}
|
