media/webrtc/signaling/src/mediapipeline/SrtpFlow.h@6474c204b198 (annotated)
media/webrtc/signaling/src/mediapipeline/SrtpFlow.h
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this file, |
| michael@0 | 3 | * You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | // Original author: ekr@rtfm.com |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef srtpflow_h__ |
| michael@0 | 8 | #define srtpflow_h__ |
| michael@0 | 9 | |
| michael@0 | 10 | #include "ssl.h" |
| michael@0 | 11 | #include "sslproto.h" |
| michael@0 | 12 | #include "mozilla/RefPtr.h" |
| michael@0 | 13 | #include "nsISupportsImpl.h" |
| michael@0 | 14 | |
| michael@0 | 15 | typedef struct srtp_policy_t srtp_policy_t; |
| michael@0 | 16 | typedef struct srtp_ctx_t *srtp_t; |
| michael@0 | 17 | typedef struct srtp_event_data_t srtp_event_data_t; |
| michael@0 | 18 | |
| michael@0 | 19 | namespace mozilla { |
| michael@0 | 20 | |
| michael@0 | 21 | #define SRTP_MASTER_KEY_LENGTH 16 |
| michael@0 | 22 | #define SRTP_MASTER_SALT_LENGTH 14 |
| michael@0 | 23 | #define SRTP_TOTAL_KEY_LENGTH (SRTP_MASTER_KEY_LENGTH + SRTP_MASTER_SALT_LENGTH) |
| michael@0 | 24 | |
| michael@0 | 25 | // For some reason libsrtp increases packet size by > 12 for RTCP even though |
| michael@0 | 26 | // the doc claims otherwise. |
| michael@0 | 27 | #define SRTP_MAX_EXPANSION 20 |
| michael@0 | 28 | |
| michael@0 | 29 | |
| michael@0 | 30 | class SrtpFlow { |
| michael@0 | 31 | public: |
| michael@0 | 32 | ~SrtpFlow(); |
| michael@0 | 33 | |
| michael@0 | 34 | |
| michael@0 | 35 | static mozilla::RefPtr<SrtpFlow> Create(int cipher_suite, |
| michael@0 | 36 | bool inbound, |
| michael@0 | 37 | const void *key, |
| michael@0 | 38 | size_t key_len); |
| michael@0 | 39 | |
| michael@0 | 40 | nsresult ProtectRtp(void *in, int in_len, |
| michael@0 | 41 | int max_len, int *out_len); |
| michael@0 | 42 | nsresult UnprotectRtp(void *in, int in_len, |
| michael@0 | 43 | int max_len, int *out_len); |
| michael@0 | 44 | nsresult ProtectRtcp(void *in, int in_len, |
| michael@0 | 45 | int max_len, int *out_len); |
| michael@0 | 46 | nsresult UnprotectRtcp(void *in, int in_len, |
| michael@0 | 47 | int max_len, int *out_len); |
| michael@0 | 48 | |
| michael@0 | 49 | NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SrtpFlow) |
| michael@0 | 50 | |
| michael@0 | 51 | static void srtp_event_handler(srtp_event_data_t *data); |
| michael@0 | 52 | |
| michael@0 | 53 | |
| michael@0 | 54 | private: |
| michael@0 | 55 | SrtpFlow() : session_(nullptr) {} |
| michael@0 | 56 | |
| michael@0 | 57 | nsresult CheckInputs(bool protect, void *in, int in_len, |
| michael@0 | 58 | int max_len, int *out_len); |
| michael@0 | 59 | |
| michael@0 | 60 | static nsresult Init(); |
| michael@0 | 61 | static bool initialized; // Was libsrtp initialized? Only happens once. |
| michael@0 | 62 | |
| michael@0 | 63 | srtp_t session_; |
| michael@0 | 64 | }; |
| michael@0 | 65 | |
| michael@0 | 66 | } // End of namespace |
| michael@0 | 67 | #endif |
| michael@0 | 68 |
