INCOMPATIBLE CHANGE to the SSH2 private key file format. There is

[u/mdw/putty] / windlg.c

diff --git a/windlg.c b/windlg.c
index f48051c..a9c1200 100644 (file)
--- 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);
+}