--- rsaref/source/md5.h	2018/04/24 16:37:52	1.1
+++ rsaref/source/md5.h	2018/04/24 16:38:03	1.1.1.2
@@ -1,7 +1,8 @@
 /* MD5.H - header file for MD5C.C
  */
 
-/* Copyright (C) 1991, RSA Data Security, Inc. All rights reserved.
+/* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
+   rights reserved.
 
    License to copy and use this software is granted provided that it
    is identified as the "RSA Data Security, Inc. MD5 Message-Digest
@@ -22,13 +23,27 @@
    documentation and/or software.  
  */
 
+#ifndef _MD5_H_
+#define _MD5_H_ 1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* MD5 context. */
 typedef struct {
-  UINT4 state[4];                                           /* state (ABCD) */
-  UINT4 count[2];                /* number of bits, modulo 2^64 (lsb first) */
-  unsigned char buffer[64];                                 /* input buffer */
+  UINT4 state[4];                                   /* state (ABCD) */
+  UINT4 count[2];        /* number of bits, modulo 2^64 (lsb first) */
+  unsigned char buffer[64];                         /* input buffer */
 } MD5_CTX;
 
 void MD5Init PROTO_LIST ((MD5_CTX *));
-void MD5Update PROTO_LIST ((MD5_CTX *, unsigned char *, unsigned int));
+void MD5Update PROTO_LIST
+  ((MD5_CTX *, unsigned char *, unsigned int));
 void MD5Final PROTO_LIST ((unsigned char [16], MD5_CTX *));
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif