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// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SERVICES_NETWORK_EXPECT_CT_REPORTER_H_
#define SERVICES_NETWORK_EXPECT_CT_REPORTER_H_
#include <map>
#include <memory>
#include "base/component_export.h"
#include "base/macros.h"
#include "net/base/network_isolation_key.h"
#include "net/http/transport_security_state.h"
#include "net/url_request/url_request.h"
namespace net {
class ReportSender;
class URLRequestContext;
} // namespace net
namespace network {
// This class monitors for violations of CT policy and sends reports
// about failures for sites that have opted in. Must be deleted before
// the URLRequestContext that is passed to the constructor, so that it
// can cancel its requests.
//
// Since reports are sent with a non-CORS-allowlisted Content-Type, this class
// sends CORS preflight requests before sending reports. Expect-CT is not
// evaluated with a particular frame or request as context, so the preflight
// request contains an `Origin: null` header instead of a particular origin.
class COMPONENT_EXPORT(NETWORK_SERVICE) ExpectCTReporter
: public net::TransportSecurityState::ExpectCTReporter,
net::URLRequest::Delegate {
public:
// Constructs a ExpectCTReporter that sends reports with the given
// |request_context|. |success_callback| is called whenever a report sends
// successfully, and |failure_callback| whenever a report fails to send.
ExpectCTReporter(net::URLRequestContext* request_context,
const base::RepeatingClosure& success_callback,
const base::RepeatingClosure& failure_callback);
~ExpectCTReporter() override;
// net::TransportSecurityState::ExpectCTReporter:
void OnExpectCTFailed(
const net::HostPortPair& host_port_pair,
const GURL& report_uri,
base::Time expiration,
const net::X509Certificate* validated_certificate_chain,
const net::X509Certificate* served_certificate_chain,
const net::SignedCertificateTimestampAndStatusList&
signed_certificate_timestamps,
const net::NetworkIsolationKey& network_isolation_key) override;
// net::URLRequest::Delegate:
void OnResponseStarted(net::URLRequest* request, int net_error) override;
void OnReadCompleted(net::URLRequest* request, int bytes_read) override;
private:
// Used to keep track of in-flight CORS preflight requests. When |request|
// completes successfully and the CORS check passes, |serialized_report| will
// be sent to |report_uri| using |report_sender_|.
struct PreflightInProgress {
PreflightInProgress(std::unique_ptr<net::URLRequest> request,
const std::string& serialized_report,
const GURL& report_uri,
const net::NetworkIsolationKey& network_isolation_key);
~PreflightInProgress();
// The preflight request.
const std::unique_ptr<net::URLRequest> request;
// |serialized_report| should be sent to |report_uri| if the preflight
// succeeds.
const std::string serialized_report;
const GURL report_uri;
const net::NetworkIsolationKey network_isolation_key;
};
FRIEND_TEST_ALL_PREFIXES(ExpectCTReporterTest, FeatureDisabled);
FRIEND_TEST_ALL_PREFIXES(ExpectCTReporterTest, EmptyReportURI);
FRIEND_TEST_ALL_PREFIXES(ExpectCTReporterTest, SendReport);
FRIEND_TEST_ALL_PREFIXES(ExpectCTReporterTest,
PreflightUsesNetworkIsolationKey);
FRIEND_TEST_ALL_PREFIXES(ExpectCTReporterTest, PreflightContainsWhitespace);
FRIEND_TEST_ALL_PREFIXES(ExpectCTReporterTest,
BadCorsPreflightResponseOrigin);
FRIEND_TEST_ALL_PREFIXES(ExpectCTReporterTest,
BadCorsPreflightResponseMethods);
FRIEND_TEST_ALL_PREFIXES(ExpectCTReporterTest,
BadCorsPreflightResponseHeaders);
// Starts a CORS preflight request to obtain permission from the server to
// send a report with Content-Type: application/expect-ct-report+json. The
// preflight result is checked in OnResponseStarted(), and an actual report is
// sent with |report_sender_| if the preflight succeeds.
void SendPreflight(const GURL& report_uri,
const std::string& serialized_report,
const net::NetworkIsolationKey& network_isolation_key);
// When a report fails to send, this method records an UMA histogram and calls
// |failure_callback_|.
void OnReportFailure(const GURL& report_uri,
int net_error,
int http_response_code);
std::unique_ptr<net::ReportSender> report_sender_;
net::URLRequestContext* request_context_;
base::RepeatingClosure success_callback_;
base::RepeatingClosure failure_callback_;
// The CORS preflight requests, with corresponding report information, that
// are currently in-flight. Entries in this map are deleted when the
// preflight's OnResponseStarted() is called.
std::map<net::URLRequest*, std::unique_ptr<PreflightInProgress>>
inflight_preflights_;
DISALLOW_COPY_AND_ASSIGN(ExpectCTReporter);
};
} // namespace network
#endif // SERVICES_NETWORK_EXPECT_CT_REPORTER_H_
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