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* Fix for big-endian platforms: check for endianness in MD5 computations.

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This is done at runtime, which is inefficient, but I can't be bothered
  to write an Autoconf test right now.
This commit is contained in:
Eelco Dolstra 2003-05-27 09:55:47 +00:00
parent 9efad76595
commit 4d21cda0cd
1 changed files with 19 additions and 6 deletions
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25
src/md5.c
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@ -31,12 +31,25 @@
#include "md5.h" #include "md5.h"
#ifdef WORDS_BIGENDIAN
# define SWAP(n) \ static md5_uint32 SWAP(md5_uint32 n)
(((n) << 24) | (((n) & 0xff00) << 8) | (((n) >> 8) & 0xff00) | ((n) >> 24)) {
#else static int checked = 0;
# define SWAP(n) (n) static int bigendian = 0;
#endif 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 /* This array contains the bytes used to pad the buffer to the next