From 778d9679e15ac62523ef7eb282783c8ec9bcc6ab Mon Sep 17 00:00:00 2001
From: Monica Moniot <mamoniot@protonmail.com>
Date: Sun, 6 Aug 2023 17:06:24 -0400
Subject: [PATCH] fixed major handshake bug

---
 src/symmetric_state.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/symmetric_state.rs b/src/symmetric_state.rs
index bc4a965..878769c 100644
--- a/src/symmetric_state.rs
+++ b/src/symmetric_state.rs
@@ -119,14 +119,13 @@ impl<App: ApplicationLayer> SymmetricState<App> {
     pub fn encrypt_and_hash_in_place(&mut self, iv: [u8; AES_GCM_IV_SIZE], plaintext_start: usize, buffer: &mut Vec<u8>) {
         let tag = App::Aead::encrypt_in_place(&self.k, iv, Some(&self.h), &mut buffer[plaintext_start..]);
         buffer.extend(&tag);
-        let mut hash = App::Hash::new();
-        hash.update(&buffer[plaintext_start..]);
-        self.h = hash.finish();
+        self.mix_hash(&buffer[plaintext_start..]);
     }
     /// Corresponds to Noise `DecryptAndHash`.
     #[must_use]
     pub fn decrypt_and_hash_in_place(&mut self, iv: [u8; AES_GCM_IV_SIZE], buffer: &mut [u8], tag: [u8; AES_GCM_TAG_SIZE]) -> bool {
         let mut hash = App::Hash::new();
+        hash.update(&self.h);
         hash.update(buffer);
         hash.update(&tag);
         let ret = App::Aead::decrypt_in_place(&self.k, iv, Some(&self.h), buffer, tag);