ARC: better diagnostics for keyfile issues

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

diff --git a/src/src/arc.c b/src/src/arc.c
index 787c6e1e203f6b371778d04ca96446151b58b833..dd2ad51b097dab098592290f02f20abe1f2a6145 100644 (file)
--- a/src/src/arc.c
+++ b/src/src/arc.c
@@ -1258,6 +1258,9 @@ if (  (errstr = exim_dkim_signing_init(privkey, &sctx))
    || (errstr = exim_dkim_sign(&sctx, hm, &hhash, sig)))
   {
   log_write(0, LOG_MAIN, "ARC: %s signing: %s\n", why, errstr);
+  DEBUG(D_transport)
+    debug_printf("private key, or private-key file content, was: '%s'\n",
+      privkey);
   return FALSE;
   }
 return TRUE;
@@ -1696,7 +1699,8 @@ g = arc_sign_append_ams(g, &arc_sign_ctx, instance, identity, selector,
         including self (but with an empty b= in self)
 */
 
-g = arc_sign_prepend_as(g, &arc_sign_ctx, instance, identity, selector, &ar,
+if (g)
+  g = arc_sign_prepend_as(g, &arc_sign_ctx, instance, identity, selector, &ar,
       privkey, options);
 
 /* Finally, append the dkim headers and return the lot. */