ssh-keygen: make verify-time argument parsing optional

From Fabian Stelzer

diff --git a/usr.bin/ssh/ssh-keygen.c b/usr.bin/ssh/ssh-keygen.c
index d7dcf85..0e4d000 100644 (file)
--- a/usr.bin/ssh/ssh-keygen.c
+++ b/usr.bin/ssh/ssh-keygen.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: ssh-keygen.c,v 1.439 2021/10/28 02:54:18 djm Exp $ */
+/* $OpenBSD: ssh-keygen.c,v 1.440 2021/10/29 03:20:46 djm Exp $ */
 /*
  * Author: Tatu Ylonen <ylo@cs.hut.fi>
  * Copyright (c) 1994 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
@@ -2657,11 +2657,13 @@ sig_process_opts(char * const *opts, size_t nopts, uint64_t *verify_timep,
        size_t i;
        time_t now;
 
-       *verify_timep = 0;
+       if (verify_timep != NULL)
+               *verify_timep = 0;
        if (print_pubkey != NULL)
                *print_pubkey = 0;
        for (i = 0; i < nopts; i++) {
-               if (strncasecmp(opts[i], "verify-time=", 12) == 0) {
+               if (verify_timep &&
+                   strncasecmp(opts[i], "verify-time=", 12) == 0) {
                        if (parse_absolute_time(opts[i] + 12,
                            verify_timep) != 0 || *verify_timep == 0) {
                                error("Invalid \"verify-time\" option");
@@ -2675,7 +2677,7 @@ sig_process_opts(char * const *opts, size_t nopts, uint64_t *verify_timep,
                        return SSH_ERR_INVALID_ARGUMENT;
                }
        }
-       if (*verify_timep == 0) {
+       if (verify_timep && *verify_timep == 0) {
                if ((now = time(NULL)) < 0) {
                        error("Time is before epoch");
                        return SSH_ERR_INVALID_ARGUMENT;