Struct Context 

pub struct Context { /* private fields */ }

One direction of one SRTP stream.

Directional on purpose: RFC 3711 keys each direction separately, and a context used for both would have two senders sharing one replay window and one rollover counter.

Implementations

impl Context

pub fn new(master_key: &[u8], master_salt: &[u8]) -> Result<Self, SrtpError>

A context from a master key and salt.

pub fn protect(&mut self, packet: &[u8]) -> Result<Vec<u8>, SrtpError>

Encrypt and authenticate an RTP packet in place, returning it with the tag appended.

packet is a complete serialized RTP packet. The header is left readable — a relay has to see the sequence number and SSRC to do its job — and authenticated, so it cannot be altered without detection.

pub fn unprotect(&mut self, packet: &[u8]) -> Result<Vec<u8>, SrtpError>

Authenticate and decrypt an RTP packet, returning the plaintext packet.

Authentication happens before decryption and before the replay window is updated: a packet that fails it never touches this context’s state, which is what stops an attacker advancing the window with forgeries.

pub fn protect_rtcp(&mut self, packet: &[u8]) -> Result<Vec<u8>, SrtpError>

Encrypt and authenticate an RTCP compound packet (RFC 3711 §3.4).

pub fn unprotect_rtcp(&mut self, packet: &[u8]) -> Result<Vec<u8>, SrtpError>

Authenticate and decrypt an RTCP compound packet.

Trait Implementations

impl Debug for Context

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.