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

[u/mdw/putty] / pageant.c

diff --git a/pageant.c b/pageant.c
index 95eb1da..0114804 100644 (file)
--- a/pageant.c
+++ b/pageant.c
@@ -237,6 +237,26 @@ static int CALLBACK PassphraseProc(HWND hwnd, UINT msg,
 }
 
 /*
+ * 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);
+}
+
+/*
  * Update the visible key list.
  */
 static void keylist_update(void)