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

[u/mdw/putty] / psftp.c

diff --git a/psftp.c b/psftp.c
index 6439de3..6b7ff1d 100644 (file)
--- a/psftp.c
+++ b/psftp.c
@@ -1362,6 +1362,25 @@ void askcipher(char *ciphername, int cs)
 }
 
 /*
+ * Warn about the obsolescent key file format.
+ */
+void old_keyfile_warning(void)
+{
+    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"
+       "Once the key is loaded into PuTTYgen, you can perform\n"
+       "this conversion simply by saving it again.\n";
+
+    fputs(message, stderr);
+}
+
+/*
  *  Print an error message and perform a fatal exit.
  */
 void fatalbox(char *fmt, ...)