From 8b2641d36fa7f3ff5347196933715d23b668d762 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Manuel=20P=C3=A9gouri=C3=A9-Gonnard?= <mpg2@elzevir.fr>
Date: Thu, 27 Aug 2015 20:03:46 +0200
Subject: [PATCH] Fix warning with MD/SHA ALT implementation

fixes #239
---
 ChangeLog        | 2 ++
 library/md2.c    | 4 ++--
 library/md4.c    | 4 ++--
 library/md5.c    | 4 ++--
 library/sha1.c   | 4 ++--
 library/sha256.c | 4 ++--
 library/sha512.c | 4 ++--
 7 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a4772e011..d2bd81eed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -33,6 +33,8 @@ Bugfix
    * Fix memory corruption on client with overlong PSK identity, around
      SSL_MAX_CONTENT_LEN or higher - not triggerrable remotely (found by
      Aleksandrs Saveljevs) (#238)
+   * Fix unused function warning when using MBEDTLS_MDx_ALT or
+     MBEDTLS_SHAxxx_ALT (found by Henrik) (#239)
 
 Changes
    * The PEM parser now accepts a trailing space at end of lines (#226).
diff --git a/library/md2.c b/library/md2.c
index 3263a2230..88d679f47 100644
--- a/library/md2.c
+++ b/library/md2.c
@@ -47,13 +47,13 @@
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */
 
+#if !defined(MBEDTLS_MD2_ALT)
+
 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }
 
-#if !defined(MBEDTLS_MD2_ALT)
-
 static const unsigned char PI_SUBST[256] =
 {
     0x29, 0x2E, 0x43, 0xC9, 0xA2, 0xD8, 0x7C, 0x01, 0x3D, 0x36,
diff --git a/library/md4.c b/library/md4.c
index 563c65317..dcd9313d6 100644
--- a/library/md4.c
+++ b/library/md4.c
@@ -47,13 +47,13 @@
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */
 
+#if !defined(MBEDTLS_MD4_ALT)
+
 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }
 
-#if !defined(MBEDTLS_MD4_ALT)
-
 /*
  * 32-bit integer manipulation macros (little endian)
  */
diff --git a/library/md5.c b/library/md5.c
index d8f216366..42c7c343c 100644
--- a/library/md5.c
+++ b/library/md5.c
@@ -46,13 +46,13 @@
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */
 
+#if !defined(MBEDTLS_MD5_ALT)
+
 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }
 
-#if !defined(MBEDTLS_MD5_ALT)
-
 /*
  * 32-bit integer manipulation macros (little endian)
  */
diff --git a/library/sha1.c b/library/sha1.c
index 14331b3ac..ffad2287b 100644
--- a/library/sha1.c
+++ b/library/sha1.c
@@ -46,13 +46,13 @@
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */
 
+#if !defined(MBEDTLS_SHA1_ALT)
+
 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }
 
-#if !defined(MBEDTLS_SHA1_ALT)
-
 /*
  * 32-bit integer manipulation macros (big endian)
  */
diff --git a/library/sha256.c b/library/sha256.c
index 28f09e5ae..4d8c868e9 100644
--- a/library/sha256.c
+++ b/library/sha256.c
@@ -46,13 +46,13 @@
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */
 
+#if !defined(MBEDTLS_SHA256_ALT)
+
 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }
 
-#if !defined(MBEDTLS_SHA256_ALT)
-
 /*
  * 32-bit integer manipulation macros (big endian)
  */
diff --git a/library/sha512.c b/library/sha512.c
index 9e3e0e0a9..d1dc8faac 100644
--- a/library/sha512.c
+++ b/library/sha512.c
@@ -52,13 +52,13 @@
 #endif /* MBEDTLS_PLATFORM_C */
 #endif /* MBEDTLS_SELF_TEST */
 
+#if !defined(MBEDTLS_SHA512_ALT)
+
 /* Implementation that should never be optimized out by the compiler */
 static void mbedtls_zeroize( void *v, size_t n ) {
     volatile unsigned char *p = v; while( n-- ) *p++ = 0;
 }
 
-#if !defined(MBEDTLS_SHA512_ALT)
-
 /*
  * 64-bit integer manipulation macros (big endian)
  */