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 "content/public/browser/resource_context.h" 17 #include "content/public/common/media_stream_request.h" 18 #include "url/gurl.h" 19 20 namespace content { 21 22 // Generates a one-way hash of a device's unique ID usable by one 23 // particular security origin. 24 CONTENT_EXPORT std::string GetHMACForMediaDeviceID( 25 const ResourceContext::SaltCallback& sc, 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|. 31 CONTENT_EXPORT bool DoesMediaDeviceIDMatchHMAC( 32 const ResourceContext::SaltCallback& sc, 33 const GURL& security_origin, 34 const std::string& device_guid, 35 const std::string& raw_unique_id); 36 37 CONTENT_EXPORT bool GetMediaDeviceIDForHMAC( 38 MediaStreamType stream_type, 39 const ResourceContext::SaltCallback& rc, 40 const GURL& security_origin, 41 const std::string& source_id, 42 std::string* device_id); 43 44 } // namespace content 45 46 #endif // CONTENT_PUBLIC_BROWSER_MEDIA_DEVICE_ID_H_ 47