11e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// Copyright 2013 The Chromium Authors. All rights reserved. 21e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 31e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)// found in the LICENSE file. 41e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)#include "content/public/browser/media_device_id.h" 51e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 61e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)#include "base/logging.h" 71e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)#include "base/strings/string_number_conversions.h" 81e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)#include "base/strings/string_util.h" 95c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#include "content/browser/browser_main_loop.h" 105c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#include "content/browser/renderer_host/media/media_stream_manager.h" 111e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)#include "crypto/hmac.h" 121e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 131e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)namespace content { 141e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)std::string GetHMACForMediaDeviceID(const ResourceContext::SaltCallback& sc, 16a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) const GURL& security_origin, 171e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) const std::string& raw_unique_id) { 181e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) DCHECK(security_origin.is_valid()); 191e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) DCHECK(!raw_unique_id.empty()); 201e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) crypto::HMAC hmac(crypto::HMAC::SHA256); 211e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) const size_t digest_length = hmac.DigestLength(); 221e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) std::vector<uint8> digest(digest_length); 235d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) std::string salt = sc.Run(); 241e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) bool result = hmac.Init(security_origin.spec()) && 25a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) hmac.Sign(raw_unique_id + salt, &digest[0], digest.size()); 261e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) DCHECK(result); 271e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) return StringToLowerASCII(base::HexEncode(&digest[0], digest.size())); 281e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)} 291e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 305d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)bool DoesMediaDeviceIDMatchHMAC(const ResourceContext::SaltCallback& sc, 31a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) const GURL& security_origin, 321e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) const std::string& device_guid, 331e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) const std::string& raw_unique_id) { 341e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) DCHECK(security_origin.is_valid()); 351e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) DCHECK(!raw_unique_id.empty()); 361e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) std::string guid_from_raw_device_id = 375d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) GetHMACForMediaDeviceID(sc, security_origin, raw_unique_id); 381e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) return guid_from_raw_device_id == device_guid; 391e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)} 401e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles) 415c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liubool GetMediaDeviceIDForHMAC(MediaStreamType stream_type, 425c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu const ResourceContext::SaltCallback& rc, 435c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu const GURL& security_origin, 445c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu const std::string& source_id, 455c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu std::string* device_id) { 465c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu content::MediaStreamManager* manager = 475c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu content::BrowserMainLoop::GetInstance()->media_stream_manager(); 485c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 495c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu return manager->TranslateSourceIdToDeviceId( 505c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu content::MEDIA_DEVICE_VIDEO_CAPTURE, 515c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu rc, 525c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu security_origin, 535c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu source_id, 545c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu device_id); 555c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu} 565c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu 571e9bf3e0803691d0a228da41fc608347b6db4340Torne (Richard Coles)} // namespace content 58