X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/41ff465810a9da24b00513e92f5aac8f1e0d5ae0..7bedb13c064e90654b709137a01c6feaee7a3abe:/windlg.c

diff --git a/windlg.c b/windlg.c
index f48051c7..a9c1200a 100644
--- a/windlg.c
+++ b/windlg.c
@@ -2952,3 +2952,23 @@ int askappend(char *filename)
     else
 	return 0;
 }
+
+/*
+ * Warn about the obsolescent key file format.
+ */
+void old_keyfile_warning(void)
+{
+    static const char mbtitle[] = "PuTTY Key File Warning";
+    static const char message[] =
+	"You are loading an SSH 2 private key which has an\n"
+	"old version of the file format. This means your key\n"
+	"file is not fully tamperproof. Future versions of\n"
+	"PuTTY may stop supporting this private key format,\n"
+	"so we recommend you convert your key to the new\n"
+	"format.\n"
+	"\n"
+	"You can perform this conversion by loading the key\n"
+	"into PuTTYgen and then saving it again.";
+
+    MessageBox(NULL, message, mbtitle, MB_OK);
+}