From 1e69706bb95a37c86c859e801b32d8872ce8201a Mon Sep 17 00:00:00 2001
From: rofl0r <retnyg@gmx.net>
Date: Mon, 9 Oct 2017 22:35:19 +0100
Subject: [PATCH] fix endless loop when seed wraps around from 0 to 0xffffffff

the issue could be experienced when the full brute-force space
till the unix epoch was searched.

test with: --start 02/1970 --end 01/1970
---
 src/pixiewps.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/pixiewps.c b/src/pixiewps.c
index 18b7ab7..fc6d85e 100644
--- a/src/pixiewps.c
+++ b/src/pixiewps.c
@@ -106,9 +106,14 @@ static void* crack_thread(void *arg) {
 			DEBUG_PRINT("Seed found");
 		}
 
+		if(seed == 0) break;
+
 		seed--;
+
 		if(seed < j->start - SECS_PER_JOB_BLOCK) {
-			j->start -= SECS_PER_JOB_BLOCK * job_control.jobs;
+			long long tmp = j->start - SECS_PER_JOB_BLOCK * job_control.jobs;
+			if(tmp < 0) break;
+			j->start = tmp;
 			seed = j->start;
 			if (seed < limit) break;
 		}