DKIM: signing with t but no x timestamp. Bug 2851

[exim.git] / src / src / dkim.c

diff --git a/src/src/dkim.c b/src/src/dkim.c
index 59025608feb82c74e1d0c594c5dbeb887444eefa..63b16af39cea040e92178a2d9b1d61a36fe1c0f3 100644 (file)
--- a/src/src/dkim.c
+++ b/src/src/dkim.c
@@ -720,8 +720,12 @@ if (dkim_domain)
       if (!(dkim_timestamps_expanded = expand_string(dkim->dkim_timestamps)))
        { errwhen = US"dkim_timestamps"; goto expand_bad; }
       else
-       xval = (tval = (unsigned long) time(NULL))
-             + strtoul(CCS dkim_timestamps_expanded, NULL, 10);
+        {
+        tval = (unsigned long) time(NULL);
+        xval = strtoul(CCS dkim_timestamps_expanded, NULL, 10);
+        if (xval > 0)
+          xval += tval;
+        }
 
     if (!(sig = pdkim_init_sign(&dkim_sign_ctx, dkim_signing_domain,
                          dkim_signing_selector,