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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 #include "content/public/browser/media_device_id.h" | 4 #include "content/public/browser/media_device_id.h" |
5 | 5 |
6 #include "base/logging.h" | |
7 #include "base/strings/string_number_conversions.h" | |
8 #include "base/strings/string_util.h" | |
9 #include "content/browser/browser_main_loop.h" | 6 #include "content/browser/browser_main_loop.h" |
10 #include "content/browser/renderer_host/media/media_stream_manager.h" | 7 #include "content/browser/renderer_host/media/media_stream_manager.h" |
11 #include "crypto/hmac.h" | |
12 | 8 |
13 namespace content { | 9 namespace content { |
14 | 10 |
15 std::string GetHMACForMediaDeviceID(const ResourceContext::SaltCallback& sc, | 11 std::string GetHMACForMediaDeviceID(const ResourceContext::SaltCallback& sc, |
16 const GURL& security_origin, | 12 const GURL& security_origin, |
17 const std::string& raw_unique_id) { | 13 const std::string& raw_unique_id) { |
18 DCHECK(security_origin.is_valid()); | 14 return MediaStreamManager::GetHMACForMediaDeviceID(sc, security_origin, |
19 DCHECK(!raw_unique_id.empty()); | 15 raw_unique_id); |
20 crypto::HMAC hmac(crypto::HMAC::SHA256); | |
21 const size_t digest_length = hmac.DigestLength(); | |
22 std::vector<uint8> digest(digest_length); | |
23 std::string salt = sc.Run(); | |
24 bool result = hmac.Init(security_origin.spec()) && | |
25 hmac.Sign(raw_unique_id + salt, &digest[0], digest.size()); | |
26 DCHECK(result); | |
27 return base::ToLowerASCII(base::HexEncode(&digest[0], digest.size())); | |
28 } | 16 } |
29 | 17 |
30 bool DoesMediaDeviceIDMatchHMAC(const ResourceContext::SaltCallback& sc, | 18 bool DoesMediaDeviceIDMatchHMAC(const ResourceContext::SaltCallback& sc, |
31 const GURL& security_origin, | 19 const GURL& security_origin, |
32 const std::string& device_guid, | 20 const std::string& device_guid, |
33 const std::string& raw_unique_id) { | 21 const std::string& raw_unique_id) { |
34 DCHECK(security_origin.is_valid()); | 22 return MediaStreamManager::DoesMediaDeviceIDMatchHMAC( |
35 DCHECK(!raw_unique_id.empty()); | 23 sc, security_origin, device_guid, raw_unique_id); |
36 std::string guid_from_raw_device_id = | |
37 GetHMACForMediaDeviceID(sc, security_origin, raw_unique_id); | |
38 return guid_from_raw_device_id == device_guid; | |
39 } | 24 } |
40 | 25 |
41 bool GetMediaDeviceIDForHMAC(MediaStreamType stream_type, | 26 bool GetMediaDeviceIDForHMAC(MediaStreamType stream_type, |
42 const ResourceContext::SaltCallback& rc, | 27 const ResourceContext::SaltCallback& rc, |
43 const GURL& security_origin, | 28 const GURL& security_origin, |
44 const std::string& source_id, | 29 const std::string& source_id, |
45 std::string* device_id) { | 30 std::string* device_id) { |
46 content::MediaStreamManager* manager = | 31 content::MediaStreamManager* manager = |
47 content::BrowserMainLoop::GetInstance()->media_stream_manager(); | 32 content::BrowserMainLoop::GetInstance()->media_stream_manager(); |
48 | 33 |
49 return manager->TranslateSourceIdToDeviceId( | 34 return manager->TranslateSourceIdToDeviceId( |
50 content::MEDIA_DEVICE_VIDEO_CAPTURE, | 35 content::MEDIA_DEVICE_VIDEO_CAPTURE, |
51 rc, | 36 rc, |
52 security_origin, | 37 security_origin, |
53 source_id, | 38 source_id, |
54 device_id); | 39 device_id); |
55 } | 40 } |
56 | 41 |
57 } // namespace content | 42 } // namespace content |
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