From 4d21cda0cd44db75f6b9f5942440a07303c06b4a Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 27 May 2003 09:55:47 +0000
Subject: [PATCH] * Fix for big-endian platforms: check for endianness in MD5
computations. This is done at runtime, which is inefficient, but I can't be
bothered to write an Autoconf test right now.
---
src/md5.c | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/src/md5.c b/src/md5.c
index 64ade3c6f..fa67ebfcd 100644
--- a/src/md5.c
+++ b/src/md5.c
@@ -31,12 +31,25 @@
#include "md5.h"
-#ifdef WORDS_BIGENDIAN
-# define SWAP(n) \
- (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24))
-#else
-# define SWAP(n) (n)
-#endif
+
+static md5_uint32 SWAP(md5_uint32 n)
+{
+ static int checked = 0;
+ static int bigendian = 0;
+ static md5_uint32 test;
+
+ if (!checked) {
+ test = 1;
+ if (* (char *) &test == 0)
+ bigendian = 1;
+ checked = 1;
+ }
+
+ if (bigendian)
+ return (((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24));
+ else
+ return n;
+}
/* This array contains the bytes used to pad the buffer to the next
--
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