T3.2: Document timestamp_ms monotonic across rekey + test

2026-05-11 21:19:03 +04:00
parent f3398adb95
commit 1b4f7b0772
6 changed files with 144 additions and 4 deletions
--- a/crates/wzp-crypto/src/rekey.rs
+++ b/crates/wzp-crypto/src/rekey.rs
@@ -36,6 +36,10 @@ impl RekeyManager {
    ///
    /// The old key is zeroized after the new key is derived.
    /// Returns the new 32-byte symmetric key.
+    ///
+    /// NOTE: Rekeying changes **only** the symmetric key material.  Sequence
+    /// numbers and timestamps in the media framing layer (e.g. `MediaHeader`)
+    /// are untouched — they continue monotonically across the rekey boundary.
    pub fn perform_rekey(
        &mut self,
        new_peer_pub: &[u8; 32],