From b8ede042a2dcc26c96d0f41b57ef5fd205f55d64 Mon Sep 17 00:00:00 2001
From: Dmitry Belyavskiy <beldmit@gmail.com>
Date: Fri, 18 Sep 2020 16:52:47 +0300
Subject: [PATCH] KDF Tree fix for BIG_ENDIAN

(cherry picked from commit 47be42da87cb9bf9bad6f415c442b586ce0752ef)
---
 gost_keyexpimp.c | 9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/gost_keyexpimp.c b/gost_keyexpimp.c
index 3979b10..b94531f 100644
--- a/gost_keyexpimp.c
+++ b/gost_keyexpimp.c
@@ -231,17 +231,10 @@ int gost_kdftree2012_256(unsigned char *keyout, size_t keyout_len,
 int gost_tlstree(int cipher_nid, const unsigned char *in, unsigned char *out,
                  const unsigned char *tlsseq)
 {
-#ifndef L_ENDIAN
-    uint64_t gh_c1 = 0xFFFFFFFF00000000, gh_c2 = 0xFFFFFFFFFFF80000,
-        gh_c3 = 0xFFFFFFFFFFFFFFC0;
-    uint64_t mg_c1 = 0xFFFFFFC000000000, mg_c2 = 0xFFFFFFFFFE000000,
-        mg_c3 = 0xFFFFFFFFFFFFF000;
-#else
     uint64_t gh_c1 = 0x00000000FFFFFFFF, gh_c2 = 0x0000F8FFFFFFFFFF,
         gh_c3 = 0xC0FFFFFFFFFFFFFF;
     uint64_t mg_c1 = 0x00000000C0FFFFFF, mg_c2 = 0x000000FEFFFFFFFF,
         mg_c3 = 0x00F0FFFFFFFFFFFF;
-#endif
     uint64_t c1, c2, c3;
     uint64_t seed1, seed2, seed3;
     uint64_t seq;
@@ -262,7 +255,7 @@ int gost_tlstree(int cipher_nid, const unsigned char *in, unsigned char *out,
         return 0;
     }
 #ifndef L_ENDIAN
-    BUF_reverse(&seq, tlsseq, 8);
+    BUF_reverse((unsigned char *)&seq, tlsseq, 8);
 #else
     memcpy(&seq, tlsseq, 8);
 #endif
-- 
2.39.5