media/webrtc/signaling/src/mediapipeline/SrtpFlow.h@ac0c01689b40
media/webrtc/signaling/src/mediapipeline/SrtpFlow.h
Thu, 15 Jan 2015 15:59:08 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 15:59:08 +0100
- branch
- TOR_BUG_9701
- changeset 10
- ac0c01689b40
- permissions
- -rw-r--r--
Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
3 * You can obtain one at http://mozilla.org/MPL/2.0/. */
5 // Original author: ekr@rtfm.com
7 #ifndef srtpflow_h__
8 #define srtpflow_h__
10 #include "ssl.h"
11 #include "sslproto.h"
12 #include "mozilla/RefPtr.h"
13 #include "nsISupportsImpl.h"
15 typedef struct srtp_policy_t srtp_policy_t;
16 typedef struct srtp_ctx_t *srtp_t;
17 typedef struct srtp_event_data_t srtp_event_data_t;
19 namespace mozilla {
21 #define SRTP_MASTER_KEY_LENGTH 16
22 #define SRTP_MASTER_SALT_LENGTH 14
23 #define SRTP_TOTAL_KEY_LENGTH (SRTP_MASTER_KEY_LENGTH + SRTP_MASTER_SALT_LENGTH)
25 // For some reason libsrtp increases packet size by > 12 for RTCP even though
26 // the doc claims otherwise.
27 #define SRTP_MAX_EXPANSION 20
30 class SrtpFlow {
31 public:
32 ~SrtpFlow();
35 static mozilla::RefPtr<SrtpFlow> Create(int cipher_suite,
36 bool inbound,
37 const void *key,
38 size_t key_len);
40 nsresult ProtectRtp(void *in, int in_len,
41 int max_len, int *out_len);
42 nsresult UnprotectRtp(void *in, int in_len,
43 int max_len, int *out_len);
44 nsresult ProtectRtcp(void *in, int in_len,
45 int max_len, int *out_len);
46 nsresult UnprotectRtcp(void *in, int in_len,
47 int max_len, int *out_len);
49 NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SrtpFlow)
51 static void srtp_event_handler(srtp_event_data_t *data);
54 private:
55 SrtpFlow() : session_(nullptr) {}
57 nsresult CheckInputs(bool protect, void *in, int in_len,
58 int max_len, int *out_len);
60 static nsresult Init();
61 static bool initialized; // Was libsrtp initialized? Only happens once.
63 srtp_t session_;
64 };
66 } // End of namespace
67 #endif
