diff --git a/library/md.c b/library/md.c
index 96065c9..07a93ec 100644
--- a/library/md.c
+++ b/library/md.c
@@ -294,4 +294,14 @@
     return 0;
 }
 
+int md_process( md_context_t *ctx, const unsigned char *data )
+{
+    if( ctx == NULL || ctx->md_info == NULL )
+        return POLARSSL_ERR_MD_BAD_INPUT_DATA;
+
+    ctx->md_info->process_func( ctx->md_ctx, data );
+
+    return 0;
+}
+
 #endif