Add basic autoconf script

1 files changed, 60 insertions, 0 deletions

diff --git a/src/md5.h b/src/md5.h
new file mode 100644
index 0000000..ce0e350
--- /dev/null
+++ b/src/md5.h
@@ -0,0 +1,60 @@
+#ifndef MD5_H
+#define MD5_H
+#include "config.h"
+
+/*
+ *	Try and determine endianness of the target system.
+ *
+ *	Other projects seem to use endian.h and variants, but these are
+ *	in non standard locations, and may mess up cross compiling.
+ *
+ *	Here at least the endianess can be set explicitly with
+ *	-DLITTLE_ENDIAN or -DBIG_ENDIAN.
+ */
+#if !defined(LITTLE_ENDIAN) && !defined(BIG_ENDIAN)
+#  if defined(__LITTLE_ENDIAN__) || \
+      (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)) || \
+      defined(AC_LITTLE_ENDIAN)
+#    define LITTLE_ENDIAN 1
+#  elif defined(__BIG_ENDIAN__) || \
+      (defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)) || \
+      defined(AC_BIG_ENDIAN)
+#    define BIG_ENDIAN 1
+#  else
+#    error Failed determining endianness of system
+#  endif
+#endif
+
+/*
+ *  Some operating systems MAY resolve the MD5* functions to
+ *  secret functions in one of their libraries.  These OS supplied
+ *  MD5 functions almost always blow up, and cause problems.
+ *  To get around the issue, we re-define the MD5 function names
+ *  so that we're sure that our module uses our tested and working
+ *  MD5 functions.
+ */
+#define MD5Init       pra_MD5Init
+#define MD5Update     pra_MD5Update
+#define MD5Final      pra_MD5Final
+#define MD5Transform  pra_MD5Transform
+
+#include <inttypes.h>
+
+struct MD5Context {
+	uint32_t buf[4];
+	uint32_t bits[2];
+	unsigned char in[64];
+};
+
+void MD5Init(struct MD5Context *);
+void MD5Update(struct MD5Context *, unsigned const char *, unsigned);
+void MD5Final(unsigned char digest[16], struct MD5Context *);
+void MD5Transform(uint32_t buf[4], uint32_t const in[16]);
+
+/*
+ * This is needed to make RSAREF happy on some MS-DOS compilers.
+ */
+
+typedef struct MD5Context MD5_CTX;
+
+#endif /* MD5_H */