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Try to decode the userinfo response like a JWT #1117

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Try to decode the userinfo response like a JWT #1117

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26 changes: 25 additions & 1 deletion lib/Service/OIDCService.php
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@
namespace OCA\UserOIDC\Service;

use OCA\UserOIDC\Db\Provider;
use OCA\UserOIDC\Vendor\Firebase\JWT\JWT;
use OCP\Http\Client\IClientService;
use OCP\Security\ICrypto;
use Psr\Log\LoggerInterface;
Expand Down Expand Up @@ -38,11 +39,34 @@ public function userinfo(Provider $provider, string $accessToken): array {
'Authorization' => 'Bearer ' . $accessToken,
],
];

try {
return json_decode($client->get($url, $options)->getBody(), true);
$userInfoResponse = $client->get($url, $options)->getBody();
} catch (Throwable $e) {
$this->logger->error('Request to the userinfo endpoint failed', ['exception' => $e]);
return [];
}

// try to decode it like a JSON string
try {
return json_decode($userInfoResponse, true);
} catch (Throwable) {
$this->logger->debug('The userinfo response is not JSON');
}

// try to decode it like a JWT token
JWT::$leeway = 60;
try {
$jwks = $this->discoveryService->obtainJWK($provider, $userInfoResponse);
$payload = JWT::decode($userInfoResponse, $jwks);
$arrayPayload = json_decode(json_encode($payload), true);
$this->logger->debug('JWT Decoded user info response', ['decoded_userinfo_response' => $arrayPayload]);
return $arrayPayload;
} catch (Throwable $e) {
$this->logger->debug('Treating the userinfo response as a JWT token. Impossible to decode it:' . $e->getMessage());
}

return [];
}

public function introspection(Provider $provider, string $accessToken): array {
Expand Down
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