xts128 mode: avoid two -Wshadow warnings in the BIG_ENDIAN code path.

Found by, compile tested & ok bluhm.

diff --git a/lib/libcrypto/modes/xts128.c b/lib/libcrypto/modes/xts128.c
index dfd3bc4..7188122 100644 (file)
--- a/lib/libcrypto/modes/xts128.c
+++ b/lib/libcrypto/modes/xts128.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: xts128.c,v 1.9 2022/11/26 16:08:53 tb Exp $ */
+/* $OpenBSD: xts128.c,v 1.10 2023/05/07 14:38:04 tb Exp $ */
 /* ====================================================================
  * Copyright (c) 2011 The OpenSSL Project.  All rights reserved.
  *
@@ -120,9 +120,9 @@ int CRYPTO_xts128_encrypt(const XTS128_CONTEXT *ctx, const unsigned char iv[16],
        }
        if (enc) {
                for (i=0;i<len;++i) {
-                       u8 c = inp[i];
+                       u8 ch = inp[i];
                        out[i] = scratch.c[i];
-                       scratch.c[i] = c;
+                       scratch.c[i] = ch;
                }
                scratch.u[0] ^= tweak.u[0];
                scratch.u[1] ^= tweak.u[1];
@@ -165,9 +165,9 @@ int CRYPTO_xts128_encrypt(const XTS128_CONTEXT *ctx, const unsigned char iv[16],
                scratch.u[1] ^= tweak1.u[1];
 
                for (i=0;i<len;++i) {
-                       u8 c = inp[16+i];
+                       u8 ch = inp[16+i];
                        out[16+i] = scratch.c[i];
-                       scratch.c[i] = c;
+                       scratch.c[i] = ch;
                }
                scratch.u[0] ^= tweak.u[0];
                scratch.u[1] ^= tweak.u[1];