From: Niels Möller <nisse@lysator.liu.se>
Date: Mon, 13 Jul 2020 19:29:02 +0000 (+0200)
Subject: Tweak stop condition of _salsa20_crypt_2core
X-Git-Tag: nettle_3.7rc1~90
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=097497ec6b93dc9b2b66afa8bd9321fb87dd6439;p=thirdparty%2Fnettle.git

Tweak stop condition of _salsa20_crypt_2core

Exit when processing exactly two blocks.
---

diff --git a/salsa20-crypt-internal.c b/salsa20-crypt-internal.c
index 1b9ca42b..da4732bc 100644
--- a/salsa20-crypt-internal.c
+++ b/salsa20-crypt-internal.c
@@ -64,7 +64,7 @@ _salsa20_crypt_2core(struct salsa20_ctx *ctx, unsigned rounds,
       _salsa20_2core (x, ctx->input, rounds);
       ctx->input[8] += 2;
       ctx->input[9] += (ctx->input[8] < 2);
-      if (length < 2 * SALSA20_BLOCK_SIZE)
+      if (length <= 2 * SALSA20_BLOCK_SIZE)
 	{
 	  memxor3 (dst, src, x, length);
 	  return;