Add _init() and _free() for hash modules
diff --git a/include/polarssl/md5.h b/include/polarssl/md5.h
index bb0ebf3..2f378f6 100644
--- a/include/polarssl/md5.h
+++ b/include/polarssl/md5.h
@@ -67,6 +67,20 @@
md5_context;
/**
+ * \brief Initialize MD5 context
+ *
+ * \param ctx MD5 context to be initialized
+ */
+void md5_init( md5_context *ctx );
+
+/**
+ * \brief Clear MD5 context
+ *
+ * \param ctx MD5 context to be cleared
+ */
+void md5_free( md5_context *ctx );
+
+/**
* \brief MD5 context setup
*
* \param ctx context to be initialized