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diff --git a/md5.h b/md5.h
index 65a2159..3946fc7 100644
--- a/md5.h
+++ b/md5.h
@@ -1,23 +1,70 @@
-#ifndef __MD5_H__
-#define __MD5_H__
+/* Declaration of functions and data types used for MD5 sum computing
+   library functions.
+   Copyright (C) 1995,1996,1997,1999,2000,2001 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _MD5_H
+#define _MD5_H 1
 
 #include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
+#include <stdint.h>
+#include <sys/types.h>
+typedef size_t md5_uintptr;
+
+/* Length in bytes of the MD5 digest */
+#define MD5_DIGEST_SIZE 16
+
+/* Structure to save state of computation between the single steps.  */
+struct md5_ctx
+{
+  char buffer[128];
+  uint32_t A;
+  uint32_t B;
+  uint32_t C;
+  uint32_t D;
+
+  uint32_t total[2];
+  uint32_t buflen;
+};
+
+/*
+ * The following three functions are build up the low level used in
+ * the functions `md5_stream' and `md5_buffer'.
+ */
+
+/* Initialize structure containing state of computation.
+   (RFC 1321, 3.3: Step 3)  */
+extern void md5_init(struct md5_ctx *ctx);
 
-#include "bithelp.h"
+/* Starting with the result of former calls of this function (or the
+   initialization function update the context for the next LEN bytes
+   starting at BUFFER.
+   It is NOT required that LEN is a multiple of 64.  */
+extern void md5_update(struct md5_ctx *ctx, unsigned length,
+		const uint8_t *buffer);
 
-typedef struct {
-    unsigned int  A,B,C,D;	  /* chaining variables */
-    unsigned int  nblocks;
-    unsigned char buf[64];
-    int  count;
-} MD5_CONTEXT;
+/* Process the remaining bytes in the buffer and put result from CTX
+   in first 16 bytes following RESBUF.  The result is always in little
+   endian byte order, so that a byte-wise output yields to the wanted
+   ASCII representation of the message digest.
 
-void md5_init(MD5_CONTEXT *);
-void md5_write(MD5_CONTEXT *, unsigned char *, size_t);
-void md5_final(MD5_CONTEXT *);
-unsigned char *md5_read(MD5_CONTEXT *);
+   IMPORTANT: On some systems it is required that RESBUF is correctly
+   aligned for a 32 bits value.  */
+extern void md5_digest(struct md5_ctx *ctx, unsigned length, uint8_t *resbuf);
 
-#endif /* __MD5_H__ */
+#endif /* md5.h */