new file mode 100644
--- /dev/null
+++ b/src/core/ngx_md5.h
@@ -0,0 +1,40 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_MD5_H_INCLUDED_
+#define _NGX_MD5_H_INCLUDED_
+
+
+#include <ngx_config.h>
+#include <ngx_core.h>
+
+
+#if (NGX_HAVE_OPENSSL_MD5_H)
+#include <openssl/md5.h>
+#else
+#include <md5.h>
+#endif
+
+
+typedef MD5_CTX  ngx_md5_t;
+
+
+#if (NGX_OPENSSL_MD5)
+
+#define  ngx_md5_init    MD5_Init
+#define  ngx_md5_update  MD5_Update
+#define  ngx_md5_final   MD5_Final
+
+#else
+
+#define  ngx_md5_init    MD5Init
+#define  ngx_md5_update  MD5Update
+#define  ngx_md5_final   MD5Final
+
+#endif
+
+
+#endif /* _NGX_MD5_H_INCLUDED_ */