From 6bf0a5cb5034a7e684dcc3500e841785237ce2dd Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 19:32:43 +0200 Subject: Adding upstream version 1:115.7.0. Signed-off-by: Daniel Baumann --- dom/media/webrtc/transport/SrtpFlow.h | 69 +++++++++++++++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 dom/media/webrtc/transport/SrtpFlow.h (limited to 'dom/media/webrtc/transport/SrtpFlow.h') diff --git a/dom/media/webrtc/transport/SrtpFlow.h b/dom/media/webrtc/transport/SrtpFlow.h new file mode 100644 index 0000000000..92fbfcf1a5 --- /dev/null +++ b/dom/media/webrtc/transport/SrtpFlow.h @@ -0,0 +1,69 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +// Original author: ekr@rtfm.com + +#ifndef srtpflow_h__ +#define srtpflow_h__ + +#include "mozilla/RefPtr.h" +#include "nsISupportsImpl.h" +#include "srtp.h" + +namespace mozilla { + +#define SRTP_ICM_MASTER_KEY_LENGTH 16 +#define SRTP_ICM_MASTER_SALT_LENGTH 14 +#define SRTP_ICM_MAX_MASTER_LENGTH \ + (SRTP_ICM_MASTER_KEY_LENGTH + SRTP_ICM_MASTER_SALT_LENGTH) + +#define SRTP_GCM_MASTER_KEY_MIN_LENGTH 16 +#define SRTP_GCM_MASTER_KEY_MAX_LENGTH 32 +#define SRTP_GCM_MASTER_SALT_LENGTH 12 + +#define SRTP_GCM_MIN_MASTER_LENGTH \ + (SRTP_GCM_MASTER_KEY_MIN_LENGTH + SRTP_GCM_MASTER_SALT_LENGTH) +#define SRTP_GCM_MAX_MASTER_LENGTH \ + (SRTP_GCM_MASTER_KEY_MAX_LENGTH + SRTP_GCM_MASTER_SALT_LENGTH) + +#define SRTP_MIN_KEY_LENGTH SRTP_GCM_MIN_MASTER_LENGTH +#define SRTP_MAX_KEY_LENGTH SRTP_GCM_MAX_MASTER_LENGTH + +// SRTCP requires an auth tag *plus* a 4-byte index-plus-'E'-bit value (see +// RFC 3711) +#define SRTP_MAX_EXPANSION (SRTP_MAX_TRAILER_LEN + 4) + +class SrtpFlow { + ~SrtpFlow(); + + public: + static unsigned int KeySize(int cipher_suite); + static unsigned int SaltSize(int cipher_suite); + + static RefPtr Create(int cipher_suite, bool inbound, + const void* key, size_t key_len); + + nsresult ProtectRtp(void* in, int in_len, int max_len, int* out_len); + nsresult UnprotectRtp(void* in, int in_len, int max_len, int* out_len); + nsresult ProtectRtcp(void* in, int in_len, int max_len, int* out_len); + nsresult UnprotectRtcp(void* in, int in_len, int max_len, int* out_len); + + NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SrtpFlow) + + static void srtp_event_handler(srtp_event_data_t* data); + + private: + SrtpFlow() : session_(nullptr) {} + + nsresult CheckInputs(bool protect, void* in, int in_len, int max_len, + int* out_len); + + static nsresult Init(); + static bool initialized; // Was libsrtp initialized? Only happens once. + + srtp_t session_; +}; + +} // namespace mozilla +#endif -- cgit v1.2.3