This CL introduces the public API surface for Sframe (Secure Frame)
encryption and decryption on RTP senders and receivers. The actual
pipeline wiring is deferred to a follow-up CL; all factory methods
currently return nullptr.
New API headers (api/sframe/):
- sframe_types.h: shared enums SframeMode (per-frame / per-packet)
and SframeCipherSuite (AES-CTR-HMAC variants, AES-GCM-128/256).
- sframe_encrypter_interface.h: SframeEncrypterInit config struct
and SframeEncrypterInterface for sender-side key management
(SetEncryptionKey).
- sframe_decrypter_interface.h: SframeDecrypterInit config struct
and SframeDecrypterInterface for receiver-side key management
(AddDecryptionKey, RemoveDecryptionKey).
Interface changes:
- RtpSenderInterface gains CreateSframeEncrypter(SframeEncrypterInit)
- RtpReceiverInterface gains CreateSframeDecrypter(SframeDecrypterInit)
- Both proxy files updated with corresponding PROXY_METHOD entries.
New RtpReceiverBase class introduced inheriting RtpReceiverInternal,
providing CreateSframeDecrypter. This mirrors the existing RtpSenderBase
pattern. AudioRtpReceiver and VideoRtpReceiver now inherit
RtpReceiverBase instead of RtpReceiverInternal, eliminating future code
duplication.
Bug: webrtc:479862368
Change-Id: I2d62b61f2d10325d8dca9f15f08a0eb0509eed01
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/452260
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Philip Eliasson <philipel@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#47224}
1aacbbfc7a