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// Copyright (c) 2015 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 CHROME_BROWSER_SSL_COMMON_NAME_MISMATCH_HANDLER_H_
#define CHROME_BROWSER_SSL_COMMON_NAME_MISMATCH_HANDLER_H_
#include <memory>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/sequence_checker.h"
#include "base/time/time.h"
#include "net/url_request/url_fetcher.h"
#include "net/url_request/url_fetcher_delegate.h"
#include "net/url_request/url_request_context_getter.h"
#include "url/gurl.h"
namespace net {
class URLFetcher;
}
// This class handles errors due to common name mismatches
// (|ERR_CERT_COMMON_NAME_INVALID|) and helps remediate them by suggesting
// alternative URLs that may be what the user intended to load.
class CommonNameMismatchHandler : public net::URLFetcherDelegate {
public:
enum SuggestedUrlCheckResult {
// The request succeeds with good response code i.e. URL exists and its
// certificate is valid.
SUGGESTED_URL_AVAILABLE,
// Suggested URL is either not available or has a bad certificate.
SUGGESTED_URL_NOT_AVAILABLE
};
enum TestingState {
NOT_TESTING,
// Disables the actual request to the |suggested_url|.
IGNORE_REQUESTS_FOR_TESTING
};
typedef base::Callback<void(SuggestedUrlCheckResult result,
const GURL& suggested_url)>
CheckUrlCallback;
CommonNameMismatchHandler(
const GURL& request_url,
const scoped_refptr<net::URLRequestContextGetter>& request_context);
~CommonNameMismatchHandler() override;
// Performs a network request to suggested URL. After completion, runs the
// |callback|.
void CheckSuggestedUrl(const GURL& url, const CheckUrlCallback& callback);
// Determines if, for |request_url| serving a certificate that is valid for
// the domain names |dns_names|, there is a name that the certificate is
// valid for that closely matches the original name in |request_url|. If
// so, returns true, and sets |*suggested_url| to a URL that is unlikely
// to cause an ERR_CERT_COMMON_NAME_INVALID error.
static bool GetSuggestedUrl(const GURL& request_url,
const std::vector<std::string>& dns_names,
GURL* suggested_url);
// Used in tests, to disable the request to |suggested_url|.
// If |testing_state| is IGNORE_REQUESTS_FOR_TESTING, then the
// callback won't get called.
static void set_state_for_testing(TestingState testing_state) {
testing_state_ = testing_state;
}
// Cancels the request to |suggested_url|
void Cancel();
private:
// net::URLFetcherDelegate:
void OnURLFetchComplete(const net::URLFetcher* source) override;
// Returns true if the check is currently running.
bool IsCheckingSuggestedUrl() const;
static TestingState testing_state_;
const GURL request_url_;
scoped_refptr<net::URLRequestContextGetter> request_context_;
CheckUrlCallback check_url_callback_;
std::unique_ptr<net::URLFetcher> url_fetcher_;
SEQUENCE_CHECKER(sequence_checker_);
DISALLOW_COPY_AND_ASSIGN(CommonNameMismatchHandler);
};
#endif // CHROME_BROWSER_SSL_COMMON_NAME_MISMATCH_HANDLER_H_