1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/webrtc/signaling/src/mediapipeline/SrtpFlow.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,68 @@
1.4 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.5 + * License, v. 2.0. If a copy of the MPL was not distributed with this file,
1.6 + * You can obtain one at http://mozilla.org/MPL/2.0/. */
1.7 +
1.8 +// Original author: ekr@rtfm.com
1.9 +
1.10 +#ifndef srtpflow_h__
1.11 +#define srtpflow_h__
1.12 +
1.13 +#include "ssl.h"
1.14 +#include "sslproto.h"
1.15 +#include "mozilla/RefPtr.h"
1.16 +#include "nsISupportsImpl.h"
1.17 +
1.18 +typedef struct srtp_policy_t srtp_policy_t;
1.19 +typedef struct srtp_ctx_t *srtp_t;
1.20 +typedef struct srtp_event_data_t srtp_event_data_t;
1.21 +
1.22 +namespace mozilla {
1.23 +
1.24 +#define SRTP_MASTER_KEY_LENGTH 16
1.25 +#define SRTP_MASTER_SALT_LENGTH 14
1.26 +#define SRTP_TOTAL_KEY_LENGTH (SRTP_MASTER_KEY_LENGTH + SRTP_MASTER_SALT_LENGTH)
1.27 +
1.28 +// For some reason libsrtp increases packet size by > 12 for RTCP even though
1.29 +// the doc claims otherwise.
1.30 +#define SRTP_MAX_EXPANSION 20
1.31 +
1.32 +
1.33 +class SrtpFlow {
1.34 + public:
1.35 + ~SrtpFlow();
1.36 +
1.37 +
1.38 + static mozilla::RefPtr<SrtpFlow> Create(int cipher_suite,
1.39 + bool inbound,
1.40 + const void *key,
1.41 + size_t key_len);
1.42 +
1.43 + nsresult ProtectRtp(void *in, int in_len,
1.44 + int max_len, int *out_len);
1.45 + nsresult UnprotectRtp(void *in, int in_len,
1.46 + int max_len, int *out_len);
1.47 + nsresult ProtectRtcp(void *in, int in_len,
1.48 + int max_len, int *out_len);
1.49 + nsresult UnprotectRtcp(void *in, int in_len,
1.50 + int max_len, int *out_len);
1.51 +
1.52 + NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SrtpFlow)
1.53 +
1.54 + static void srtp_event_handler(srtp_event_data_t *data);
1.55 +
1.56 +
1.57 + private:
1.58 + SrtpFlow() : session_(nullptr) {}
1.59 +
1.60 + nsresult CheckInputs(bool protect, void *in, int in_len,
1.61 + int max_len, int *out_len);
1.62 +
1.63 + static nsresult Init();
1.64 + static bool initialized; // Was libsrtp initialized? Only happens once.
1.65 +
1.66 + srtp_t session_;
1.67 +};
1.68 +
1.69 +} // End of namespace
1.70 +#endif
1.71 +
