media_device_id.h revision a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7 
1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4//
5// Media device IDs come in two flavors: The machine-wide unique ID of
6// the device, which is what we use on the browser side, and one-way
7// hashes over the unique ID and a security origin, which we provide
8// to code on the renderer side as per-security-origin IDs.
9
10#ifndef CONTENT_PUBLIC_BROWSER_MEDIA_DEVICE_ID_H_
11#define CONTENT_PUBLIC_BROWSER_MEDIA_DEVICE_ID_H_
12
13#include <string>
14
15#include "content/common/content_export.h"
16#include "url/gurl.h"
17
18namespace content {
19
20class ResourceContext;
21
22// Generates a one-way hash of a device's unique ID usable by one
23// particular security origin.
24CONTENT_EXPORT std::string GetHMACForMediaDeviceID(
25    ResourceContext* rc,
26    const GURL& security_origin,
27    const std::string& raw_unique_id);
28
29// Convenience method to check if |device_guid| is an HMAC of
30// |raw_device_id| for |security_origin|.
31CONTENT_EXPORT bool DoesMediaDeviceIDMatchHMAC(
32    ResourceContext* rc,
33    const GURL& security_origin,
34    const std::string& device_guid,
35    const std::string& raw_unique_id);
36
37}  // namespace content
38
39#endif  // CONTENT_PUBLIC_BROWSER_MEDIA_DEVICE_ID_H_
40