From c8c5f35bb45db0547ea4c3e1d986051e47ba78d2 Mon Sep 17 00:00:00 2001
From: Richard van der Hoff <richard@matrix.org>
Date: Mon, 16 May 2016 11:53:35 +0100
Subject: [PATCH] crypto.cpp: Fix comments

These seem to be the wrong way around.
---
 src/crypto.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/crypto.cpp b/src/crypto.cpp
index da1d617..ffe2661 100644
--- a/src/crypto.cpp
+++ b/src/crypto.cpp
@@ -298,14 +298,14 @@ void olm::hkdf_sha256(
         salt = HKDF_DEFAULT_SALT;
         salt_length = sizeof(HKDF_DEFAULT_SALT);
     }
-    /* Expand */
+    /* Extract */
     hmac_sha256_key(salt, salt_length, hmac_key);
     hmac_sha256_init(&context, hmac_key);
     ::sha256_update(&context, input, input_length);
     hmac_sha256_final(&context, hmac_key, step_result);
     hmac_sha256_key(step_result, olm::SHA256_OUTPUT_LENGTH, hmac_key);
 
-    /* Extract */
+    /* Expand */
     hmac_sha256_init(&context, hmac_key);
     ::sha256_update(&context, info, info_length);
     ::sha256_update(&context, &iteration, 1);